TI Power Design Cookbook

Reference Design CookbookPower Management Products

3Q 2005

Technology for InnovatorsTM

2 Reference Design Cookbook

Welcome

Power Quick Search Tool

Texas Instruments 3Q 2005 Reference Design Cookbook for Power Management Products

Welcome to TI’s first Power Management Cookbook. Many thanks to Robert Kollman and his Design Services Teamand TI Applications Engineering for supplying this collection of complete power solutions and design documentationfrom TI’s extensive library of reference designs and evaluation modules (EVMs) available to our customers.

TI also has many other reference designs that can be found at: www.ti.com/powerreferencedesigns. If you do notfind what you are looking for in this booklet, please check this website. It is frequently updated with new circuits.

TI hopes that this Cookbook will help to simplify and streamline your power supply designs.

Enjoy!

Check out TI’s Power Quick Search Toolfor recommended power solutions across DC/DC Conversion and PWM Controller products based on user input criteria.

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Reference Design Cookbook

Table of Contents

3

Inside

Converter Design Topology VIN VOUT IOUT (A) Part Number Page

Synchronous Buck 2.5 - 6.0 1.5 0.4 TPS62220 4

Synchronous Buck 2.5 - 6.0 1.8 1.2 TPS62040 6

Non-Synchronous Buck 12 - 18 9.6 1 TPS54350 8

Inverting Buck Boost 5 –5 1.5 TPS54350 10

6-A Monolithic Buck 4.0 - 6.0 3.3 6 TPS54610 12

5-V, 1-A Boost Converter 1.8 - 5.0 5 1 TPS61030 14

5-V, Non-Synchronous Buck in SOT-23 4.5 - 5.5 3.3 2.75 TPS64201 16

Sepic Controller 3.0 - 4.2 3.3 3 TPS43000 18

Low Input Voltage Synchronous Buck 3.0 - 5.5 2.5 15 TPS40007 20

12-V, Input Synchronous Buck 12 1.8 15 TPS40055 22

Negative Output Flyback 12 –12 0.5 UC3572 24

Synchronous Buck 5 - 14 1.8 10 TPS40071 26

Dual Output Synchronous Buck 9.0 - 18.0 5.0 and 3.3 14 and 10 TPS51020 28

Wide Input Synchronous Buck 10 - 55 3.3 4 TPS40060 30

2-Phase Buck with Integrated Drivers 10 - 14 1.5 40 TPS40130 32

UCC38C4x Boost 12 24 3.5 UCC38C4x 34

Isolated Synchronous Flyback 36 - 75 3.3 V 5 UCC3809 36

Triple Output Flyback 5 - 24 12/5/–5 1.0.5/0.3 UCC3813 38

Active Clamp Forward Converter –36 - 72 3.3 30 UCC2580 40

Synchronous Switch-Mode Lithium-Ion Charger 4.35 - 16 2 bq24103 42

TI also has many other reference designs that can be found at: www.ti.com/powerreferencedesigns

Evaluation Module - TPS62220EVM-014

4 TPS62220: 400-mA Synchronous Buck Converter in ThinSOT-23


SpecificationsParameter Test Conditions Min Typ Max Unit

Input Voltage 2.5 3.6 6.0 V

Output Voltage 1.455 1.5 1.545 V

Load Current 0 400 mA

Output Ripple Voltage VIN = 3.6 V; IO = 10 mA 25 40 mVPP

VIN = 3.6 V; IO = 400 mA 5 10 mVPP

Efficiency VIN = 2.7 V; IO = 100 mA 90 %

VIN = 3.7 V; IO =100 mA 87 %

Web LinksReference Designs:http://www.ti.com/powerreferencedesigns

Datasheets, User’s Guides, Samples:www.ti.comPart Number Search: TPS62220

C410 µF

C34.7 µF

VI

GND

EN

SW

FB

TPS62220

1

2

3

5

4

C2100 pF

C122 pF

R2180 kΩ

R1360 kΩ

L14.7 µHVI

2.5 V to 6 VVO1.5 V/400 mA

DescriptionThe TPS6222x family of synchronous buck converters with integrated FETs inThinSOT-23 can provide up to 400 mA of output current from inputs as low as2.5 V. The circuit below was configured to provide 1.8 V at 400 mA with a 4.7-µH inductor and 10-µF output capacitor. The TPS6222x achieves high efficiency over the entire load current range by switching from traditional pulse width modulation (PWM) at high load to pulsed frequency modulation(PFM or Power Save Mode) at light load.


TPS62220: 400-mA Synchronous Buck Converter in ThinSOT-23 5

Test Results

Efficiency vs. Load Current Load Transient Response

PWM Mode Operation

Startup

Power Save Mode Operation

6 TPS62040: 1.2-A Synchronous Buck Converter in MSOP-10 / 3x3 QFN



Input Voltage 2.5 3 - 6 6.0 V


Load Current 0 1200 mA

Output Ripple Voltage VIN = 3.6 V; IO = 10 mA 30 40 mVPP

VIN = 3.6 V; IO = 1000 mA 10 15 mVPP


VIN = 3.6 V; IO =1000 mA 87 %

DescriptionThe TPS6204x family of synchronous buck converters with integrated FETs in 10-pin MSOP PowerPad™ or 3x3 QFN can provide up to 1.2 A of output currentfrom inputs as low as 2.5 V. The circuit below was configured to provide 1.8 Vwith a 4.7-µH inductor and 22-µF output capacitor. The TPS6204x achieves highefficiency over the entire load current range by switching from traditional pulsewidth modulation (PWM) at high load to pulsed frequency modulation (PFM orPower Save Mode) at light load. Power save mode can be disabled by tying theMODE pin to VIN.



C422 µF

C322 µF

VINVINEN

GNDMODE

SWSW

FB

PGNDPGND

TPS62040

23 7164

5109

8

C2100 pF

C133 µF

R2180 kΩ

R1470 kΩ

L14.7 µHVIN

2.5 V to 6 VVOUT1.8 V/1.2 A

Components:C1: Taiyo Yuden JMK316BJ226MLC2: Taiyo Yuden JMK316BJ226MLL1: Sumida CDRH4D28C-4R7

Evaluation Module - TPS62040


TPS62040: 1.2-A Synchronous Buck Converter in MSOP-10 / 3x3 QFN 7

Test Results

Efficiency vs. Load Current Load Transient Response

PWM Mode Operation

Startup

Power Save Mode Operation

8 TPS54350 : 12-V Non-Synchronous Buck Converter



Input Voltage 12 18 V


Load Current 0.02 1 A

Switching Frequency 500 kHz

Output Ripple Voltage VIN = 18 V; VOUT = 9.68 V; IO = 1A 8 mVPP

Efficiency VIN = 12 V; VOUT= 9.68 V; IO = 1A 95 %

VIN = 18 V; VOUT = 9.68 V; IO = 1A 94 %

DescriptionThe TPS54350 is a medium output current synchronous buck PWM converterwith an integrated high-side MOSFET and a gate driver for an optional low-sideexternal MOSFET. Features include a wide input voltage range (4.5 to 20 VDC)with an adjustable output voltage down to 0.9 V, an adjustable switching frequency up to 700 kHz, as well as current limit, adjustable under-voltage lockout circuit, an internal slow-start circuit to limit in-rush currents, and apower good output to indicate valid output conditions. The synchronization feature is configurable as either an input or an output for easy 180° out-of-phase synchronization. This device is also available in a thermally enhancedPowerPAD™ package.



6 V Max Pull-up VoltageTP1

R110 kΩ

TP2Power Good

EnableTP4

SyncTP3

12-18 V InputTP5

TP8

VINGND

J112

C310 F25 V

U1TP554350PWP

12345678

161514131211109

VINVINUVLOPWRGDRTSYNCENACOMP

BOOTPHPHLSG

VBIASPGNDAGND

VSENSEPwrPd17

C10.1 F

C61 F

D1MBRS340SMC

L2100 H

C51 F25 V

TP6 TP7

VOUTJ2

9.6 V @ 1 AGND2

1

TP9R9

49.9Ω

TP10C9

5600 pF 2.5 kΩ 10 kΩ

R7 R8

C11

100 pF

TP11

R111.82 kΩ

R10 C10

200 Ω 1000 pF

Reference Design Number - PMP 718


TPS54350 : 12-V Non-Synchronous Buck Converter 9

Test Results

Gain

Phase

Output Ripple (across C5)VIN = 18 V at 1 A

Phase Node Waveform (TP6 to GND from schematic pg. 8)VIN = 18 V; VOUT = 9.68 VOUT at 1 A

Control Loop Gain/ PhaseVIN = 15 V at 1 A

65%

70%

75%

80%

85%

90%

95%

100%

0 200 400 600 800 1000Load (mA)

eff 12 V eff 18 V

Effic

ienc

y

Startup WaveformTurn On VIN = 18 V, VOUT = 9.68 V at 1 A Efficiency

6 V Max Pull-up VoltageTP1

R11.0 kΩ0603

TP2 Power Good EnableTP4

SyncTP3

TP5

TP8

VIN5 VINGND

J112 C3

10 µF

U1TPS54350PWP

12345678

161514131211109

VINVINUVLOPWRGDRTSYNCSS/ENACOMP

BOOTPHPH

LSGVBIASDGNDAGND

VSENSEPwrPd17

C10.1 µF

C61 µF

C4220 µF

L2

C1310 µF

C1410 µFC12

10 µF

TP6 TP14

VOUTJ2

GND-5 V @ 1.0 A2

1

TP7R9

49.9 Ω

TP10 TP13C9

4700 pF 40 kΩ 100 kΩ

R7 R8

C11

470 pF

TP11 R1121.5 kΩ

R10 C15

+

+8 7 6 5

4

3 2 1

Q1IRF7402

22 µHC2220 µF

R2100 kΩ

R443.2 kΩ

R50Ω

R6OPEN

C84700 pF

10 kΩ 1000 pF

Do not connect to system ground1

1

10 TPS54350: 5-V Inverting Synchronous Buck Boost Converter



Input Voltage 5 V

Output Voltage –5.06 –5.05 –5.05 V

Load Current 0.03 1.5 A

Switching Frequency 250 500 700 kHz

Output Ripple Voltage VIN = 5 V; VOUT = –5.05 V; IO = 1.2 A 100 mVPP

Efficiency VIN = 5 V; VOUT = –5.05 V; IO = 0.56 A 75 88 %

DescriptionPMP 546 uses the TPS54350 in a buck-boost mode to generate negative voltagefrom a positive one. This configuration can be used when the input plus the output voltage do not exceed the device’s voltage limitations of 20 V and whenthe sum of the input and output current do not exceed the device’s rated currentof 3 A. The circuit functions by turning the hide-side switch on to increase theinductor current. Then the low switch or diode charges the output capacitor.Note, the output current is discontinuous so significant filtering is required.





TPS54350: 5-V Inverting Synchronous Buck Boost Converter 11

Efficiency

10%

20%

30%

40%

50%

60%

70%

80%

90%

0 200 400 600 800 1000 1200 1400 1600

Load (mA)

Eff (

%)

Eff 5 V

Startup WaveformTurn On VIN = 5 V, VOUT = –5.05 V at 1.0 A

Efficiency 5 VIN

Test Results

Phase

Gain

Output Ripple (across C14)VIN = 5 VOUT at 1.0 A

Control LoopVIN = 5 VOUT at 1.0 A

Phase Node Waveform (TP6 to GND from schematic on page 10)VIN = 5 V; VOUT = –5.05 V at 1.0 A

Phase Node Waveform (LSG Pin 13 of TPS54350)VIN = 5 V; VOUT = –5.05 V at 1.0 A

12 TPS54610: 5-V, 6-A Monolithic Buck Converter


SYNCHSS/ENA

GNDPWRGD

J21

12

234

+

VIN

VIN

+

+ + +

Optional

GNDVIN

TP6

TP7

C1 C3220 µF

JP1

C20.047 µF

C40.1 µF

R710 kΩ

TP1

C568 pF

C66800 pF

R19.76 kΩ

R23.74 kΩ

C7 R5 R6

0.012 µF 1.18 kΩ 49.9 ΩR4

10 kΩ

TP3

0.047

C8

C14

R8

TP2

R3

U1TPS54610PWP

2423222120

131211109876519181716

28

27

26

25

4

3

2

115

14

C910 µF

L14.7 µH

C10470 µF4 V

C11470 µF4 V

C12

TP8

TP4J3

VOUTGNDC13

1000 pF

TP5

1

1 1

1

1

1

RT

PGNDPGNDPGNDPGNDPGNDBOOT

PHPHPHPHPHPHPHPHPH

VINVINVINVINVIN

SYNCH

SS/ENA

VBIAS

PWRGD

COMP/NC

VSENSE

ANAGND

PwrPd




Load Current 0 5 6 A


Output Ripple Voltage VIN = 5 V; IO = 5 A 50 mVPP

Efficiency VIN = 5 V; IO = 1 A 95.7 %

VIN = 5 V; IO = 5 A 91.4 %

DescriptionThe TPS54610 is a member of the SWIFT™ family of synchronous buck PWM converters. The TPS54610 DC/DC regulator is ideal for low input voltage, high output current applications. The TPS54610 integrates all required activecomponents including a true, high-performance, voltage-error amplifier thatenables maximum performance and flexibility in choosing the output filter L and C components; an under-voltage-lockout circuit to prevent Startup untilthe input voltage reaches 3 V; an internally or externally set slow-start circuit tolimit inrush currents; and a power good output useful for processor/logic reset,fault signaling, and supply sequencing. The TPS54610 is available in a thermallyenhanced 28-pin TSSOP (PWP) PowerPAD™ package, which eliminates bulkyheatsinks. TI provides evaluation modules and the SWIFT designer software tool to aid in quickly achieving high-performance power supply designs to meet aggressive equipment development cycles.





TPS54610: 5-V, 6-A Monolithic Buck Converter 13

Test Results

Efficiency vs. Load Current Using Electronic Load

89%90%91%92%93%94%95%96%97%

0 1 2 3 4 5 6

Load Current (A)

4 Vin 5 Vin 6 Vin

Load Regulation

3.26

3.27

3.28

3.29

3.3

0 1 2 3 4 5 6

Load Current (A)

4 Vin 5 Vin 6 Vin

VIN

VOUT

Startup: The input voltage was set at 5.5 V with no load on theoutput.

Output Ripple Voltage: The image was taken with a 5-A load and5-V input.

Efficiency

Load Regulation

Load Transients: The input voltage was set to 5 V. The 4-A loadstep shown below results in 60 mVPP of output ripple.

14 TPS61030: Synchronous Boost Converter with Integrated 4.5-A Switch



Input Voltage 1.8 5.5 V

Output Voltage VIN 5.5 V

Output Current 1000 mA

Output Ripple Voltage VIN = 3.3 V; IO = 1 A; Sync = VDD 25 40 mVPP

VIN = 3.3 V; IO = 50 mA; Sync = GND 5 10 mVPP


VIN = 2.4 V; IO = 300 mA 93 %

DescriptionThe TPS6103x family of synchronous boost converters provides a power solutionfor one-cell lithium or two to three-cell alkaline, NiCd, or NiMH based systems.The TPS6103x is also the ideal solution for circuits that require a 3.3-V to 5.0-Vconversion. The circuit below was configured to provide 5.0 V at 1000 mA witha 6.8-µH inductor and 220-µF output capacitor. The TPS6103x achieves high efficiency over the entire load current range by switching from a fixed frequencymode of operation at high loads to a power save mode at light loads. The powersave mode can be disabled by connecting the SYNC pin to VDD. The design alsofeatures a low battery detection circuit configured to pull LBO low when theinput voltage reaches approximately 1.8 V.



KFF

L1

6.8 µH

1.8 V to 5 VInput

C110 µF

R1

R2

SW

VBAT

EN

LBI

SYNC

GND

VOUT

FB

LBO

PGND

TPS6103x

R3

R4

C22.2 µF

C3220 µF

R6

Low BatteryComparatorOutput

5 V Up to1000 mA

Evaluation Module - TPS61030


TPS61030: Synchronous Boost Converter with Integrated 4.5-A Switch 15

Test Results

Efficiency vs. Output Current Load Transient Response

Output Voltage in Continuous Mode

Maximum Output Current vs. Input Voltage

Output Voltage in Power Save Mode

16 TPS64201: 5-V Buck Converter - Non-Synchronous Controller





Load Current 0 2.25 3 A


Output Ripple Voltage VIN = 5 V; IO = 1 A 10 20 mVPP


VIN = 5 V; IO = 2.5 A 90.3 %

DescriptionThe TPS64201 is a member of the TPS6420x family of non-synchronous step-down controllers. The TPS6420x controllers are ideal for systems powered froma 5-V or 3.3-V bus or for applications powered from a 1-cell Li-Ion battery orfrom a 2- to 4-cell NiCd, NiMH, or alkaline battery. These step-down controllersdrive an external P-channel MOSFET allowing design flexibility. To achieve highest efficiency over a wide load current range, this controller uses a minimum on time, minimum off time control scheme and consumes only 20-µAquiescent current. The minimum on time of typically 600 ns (TPS64203) allowsthe use of small inductors and capacitors. When disabled, the current consump-tion is reduced to less than 1 µA. The TPS6420x is available in the 6-pin SOT23 (DBV) package and operates over a free air temperature range of –40 °C to 85 °C.



J112

J212

4.5 to 5.5 VIN

GND

C410 µF

C5 R4100 kΩ

JP1

U1TPS64201

1

2

3

6

5

4

R60 Ω

R5

R7

0 Ω

D1B320A

R81 MΩ

Q1Si2323

L1

10 µHR1

165 kΩ

R282.5 kΩ

C182 pF

C222 µF

C3

J4

3.3 VOUT @ 2.75 A

GND

12

12

R30.02 Ω

ENGNDFB

SWVIN

ISENSE

User defined

Short R5 and R3 and open R6 to allow current sense using Q1’s Rds On

1

2

1

1

2



TPS64201: 5-V Buck Converter - Non-Synchronous Controller 17

Test Results

Efficiency vs. Load Current Using R-Box

88%

89%90%

91%

92%

93%

94%

95%

0 0.5 1 1.5 2 2.5 3

Load Current (A)

5 Vin 4.5 Vin 5.5 Vin

Load Regulation

3.233.243.253.263.273.283.29

3.33.313.323.33

0 0.5 1 1.5 2 2.5 3

Load Current (A)

5 Vin 4.5 Vin 5.5 Vin

Startup: The input voltage was set at 5 V with no load on the output.

Output Ripple Voltage: The image was taken with a 1-A load and a 5-V input.

Efficiency

Load Regulation

Load Transients: The input voltage was set to 5 V. The 1-A load step shown below results in 200 mV of output ripple.Channel 1: VOUT (AC coupled)Channel 2: Load Current (1 A –> 2 A)

18 TPS43000: SEPIC Converter - High Frequency Synchronous Controller







Output Ripple Voltage VIN = 3.7 V; IO = 3 A 12 mVPP

Efficiency VIN = 4.2 V; IO = 1 A 87 %

VIN = 4.2 V; IO = 3 A 85 %

VIN = 3.0 V; IO = 1 A 88.5 %

VIN = 3.0 V; IO = 3 A 80.5 %

DescriptionThis reference design uses the TPS43000 in SEPIC topology to convert from 3.0 to 4.2 V input to 3.3 V at 3-A output. The TPS43000 in SEPIC topology is ideal for nickel, alkaline or lithium-ion battery applications. The TPS43000 operates either in a fixed-frequency mode, where the user programs the frequency, or in an automatic PFM mode. In the automatic mode, the controllergoes to sleep when the inductor current goes discontinuous, and wakes upwhen the output voltage has fallen by 2%. The TPS43000 also has a user programmable discontinuous or continuous conduction mode.



U1TPS43000

+ + +

J4123

J3123

5 6

7

1 2

3

8 L31.5 µH

SYNC/SDCSSRTCCMBUCKPCMCOMPFG

SWNSWP

VPHDRV

GNDHDRVVOUT

VIN

3.0 - 4.2 VIN

GND

J11234

C10470 µF6.3 V

R3127 kΩ

C14470 pF

C134700 pF

R430.1 kΩ

R653.6 kΩ

C15Open

R5Open

161514131211109

12345678

C111 µF

C121 µF

R7169 kΩ

C61 µF

D2BAT54

R11 kΩ

R21 kΩ

C110 µF6.3 V

L16.8 µH

C2220 µF

6.3 VC310 µF6.3 V

C410 µF6.3 V C5

Open

D21RFR3706 L2

6.8 µH

D1MBRS340T3

C710 µF6.3 V

C610 µF6.3 V

C9220 µF6.3 V

C10220 µF6.3 V

C1710 µF6.3 V

3.3 VOUTJ2

GND

1234

Q1Si4403DY

Fsw = 300 KHz



TPS43000: SEPIC Converter - High Frequency Synchronous Controller 19

Test Results

Phase

Gain

PMP169 EFFICIENCY3.3 VOUT

70.071.072.073.074.075.076.077.078.079.080.081.082.083.084.085.086.087.088.089.090.0

0.2 0.6 1.0 1.4 1.8 2.2 2.6 3.0Output Current

3.0 VIN 3.7 VIN 4.2 VIN

Turn On VIN = 3.7 VOUT; No LoadChannel 1: VIN; Channel 2: VOUT Efficiency

Transient ResponseTop Trace: VO at 200 mV/div; Bottom Trace: IO at 1 A/div

FET Drain Voltage4.2 VIN at 3 A

Output Ripple 3.7 VIN; IO = 3 A

Control Loop3.7 VIN; IO = 3 A

20 TPS40007: Highly Efficient, Low Input Voltage, Synchronous Buck Controller



Input Voltage 3.0 5.5 V


Load Current 0 15 A


Output Ripple Voltage VIN = 5 V; IO = 15 A 20 25 mVPP


VIN = 3.3 V; IO = 9 A 93 %

DescriptionThe TPS40007 synchronous buck controller generates a 2.5-V output at up to 15 A from either a 3.3-V or 5-V input. The TPS40007 is a voltage-mode, synchronous buck PWM controller that utilizes TI’s proprietary Predictive GateDrive™ technology to wring maximum efficiency from step-down converters.Predictive Gate Drive technology controls the delay from main switch turn-off to synchronous rectifier turn-on and also the delay from rectifier turn-off to main switch turn-on. This allows minimization of both reverse recovery and conduction losses in the MOSFET body diodes. The TPS40007 allows this design to achieve a peak efficiency greater than 94%.



C1330 µF

C141 µF

C134.7 nF

C11180 pF

C7

1.5 nF

R4

5.90 kΩ

R2 16.2 kΩ R1 1.8 Ω

R5 1.8 Ω

R216.2 kΩ

C6 1 µF

C2330 µF

C322 µF

C422 µF

C522 µF

C1210 nF

R610 kΩ

C156.8 nF

R7698 Ω

R83.92 kΩ

C8470 µF

C9470 µF

C101 µF

TP6

TP5

TP7

1234

TP1J1

TP2

TP8

L11 uH

1234

J2

TP4

Q1

Q2+ +

++

1

2

345

10

9

876

ILIMFBCOMPSS/SDGND

BOOTHDRV

SWVDD

LDRVPwrPd

U1TPS40007DGQ

11

VIN

VOUT - 2.5 V

Si4866DY

Si4866DY



TPS40007: Highly Efficient, Low Input Voltage, Synchronous Buck Controller 21

Test Results

Gain and Phase Margin vs. Frequency Output Voltage Ripple

Typical Switch Node Waveform

Efficiency vs. Output Current Transient Response

22 TPS40055 : 15-A Buck Converter, Wide Input Range Synchronous Controller


12345678

(+)(+)(–)(–)

1234

161514131211109

L11.7 µH

C1547 µF

C134.7 nF

C7100 pF

C1 470 pF

C2 0.1 µF

C3 2.2 nF

D1BAS16

R4243 kΩ

R8 226 Ω

R1220 Ω

R110 Ω

TP3 TP6

TP5

TP7

VOUT = 1.8 V

TP1J1

TP2

TP4

R35.49 kΩ

C64.7 nF

C110.1 µF

R2 165 kΩ

C4 470 pF

R5

10 kΩ

R7

8.66 kΩ

C5

5.6 nF

R1 1 kΩ

R916.2 kΩ

R671.5 kΩ

C100.1 µF

C1222 µF

C80.1 µF

C91 µF

C1422 µF

C180.1 µF

Q1

Q2D2

30BQ040

U1TPS40055PWP

PwrPd

KFFRTBP5SYNCSGNDSSVFBCOMP

ILIMVIN

BOOSTHDRV

SWBP10LDRV

PGND

17

+C17

470 µFC16

470 µF

+

(+)(+)(–)(–)

4321

TP9

J1

TP10

TP8

0 ΩHAT2167H

HAT2168H


Input Voltage 10.8 12 13.2 V

VOUT 1.75 1.80 1.85 V

IOUT 0 10 15 A


Output Ripple 35 mVPP

Efficiency IOUT = 6 A 92 %

DescriptionThe TPS40055 is a family of high-voltage, wide-input, synchronous, step-downconverters. This family of controllers offers design flexibility with a variety ofuser programmable functions including soft start, UVLO, voltage feedforward,high-side current limit, and loop compensation. This design consists of twotracking, synchronized buck converters using the TPS40055 and TPS40052. The TPS40055 generates a 3.3-V/0.3-A output and the TPS40052 generates a1.2-V/5.9-A output. The input to both converters is 12VDC. The output voltage of each converter tracks both at power up and power down. The TPS40052 converter is synchronized to run at the same frequency (phase shifted 180°) as the TPS40055 converter.





TPS40055 : 15-A Buck Converter, Wide Input Range Synchronous Controller 23

Test Results

0

1

2

3

4

5

6

7

0 2 4 6 8 10 12 14 16

IOUT - Output Current - A

P DISS

- Po

wer

Dis

sipa

tion

- WGa

in -

dB

Phas

e - °

100 100 k10 k1 k

20

−30

10

−20

30

50

−10

0

40

100

0

80

20

120

160

40

60

140

Gain

Phase

t − Time − 200 µs/div

V OUT = 50 mV/div

IOUT 5 A/div

78.00

80.00

82.00

84.00

86.00

88.00

90.00

92.00

94.00

0 2 4 6 8 10 12 14 16

IOUT - Output Current - A

Eff (

%)

t − Time − 1 µs/div

IOUT = 15 A

V RIPPLE(10 mV/div)

Efficiency vs. Load

Overall Gain and Phase vs. Frequency

Power Dissipation vs. Load Transient Response

Output Voltage Ripple

24 UC3572 PWM: Negative Output Flyback Converter


J11

2

3

4

1

2

TP1

TP2

10.8 V - 13.2 VIN

GND

R123.2 kΩ

R1001.74 kΩ

C41µF

C50.01 µF

R349.9 kΩ

C21 µF16 V

C122 µF16 V

U1UC3572D

1

3

4

2

8

6

5

7

C3330 pF

freq = 200 KHz

R20.05 Ω

C847 pF R4

100 kΩ

L18.2 µH

Q1Si2343DS

TP4

D1B340LA

C722 µF16 V

TP5J2

-12 V @ 0.5 A

GND

EAINV

EAOUT

CS

VCC

3VREF

RAMP

GND

OUT


Input Voltage 10.8 12 13.2 V

Output Voltage –12.36 –12 –11.64 V

Load Current 0 0.5 A


Output Ripple Voltage VIN = 12 V; IO = 0.5 A 120 150 mVPP

Efficiency VIN = 12 V; IO = 0.5 A 83 %

VIN = 12 V; IO = 0.25 A 82 %

DescriptionThe UC3572 is a negative output flyback pulse width modulator used to converta positive 12-V input voltage to a regulated –12-V output voltage at a current up to 0.5 A. The chip is optimized for use in a single inductor negative flybackswitching converter employing an external PMOS switch. The controller consistsof a precision reference, an error amplifier configured for voltage mode opera-tion, an oscillator, a PWM comparator with latching logic, and a 0.5-A peak gatedriver. The UC3572 includes an undervoltage lockout circuit to insure sufficientinput supply voltage is present before any switching activity can occur, and apulse-by-pulse current limit. Output current is sensed and limited to a definedmaximum value. The UVLO circuit turns the chip off when the input voltage isbelow the UVLO threshold. The UC3572 allows this design to achieve a peakefficiency of 83%.


Datasheets, User’s Guides, Samples:www.ti.comPart Number Search: UC3572



UC3572 PWM: Negative Output Flyback Converter 25

Test Results

Phase @ 0.1 A

Phase @ 0.5 A

Gain @ 0.5 AGain @ 0.1 A

Output RippleVIN = 12 V; IO = 0.5 A, 0.1 V/div

Control loopVIN = 12 V; IO = 0.1 A/0.5 A

Transient ResponseTop Trace: VO at 200 mV/divBottom Trace: IO at 200 mA/div

Switch Mode WaveformVoltage at TP4 (5 V/div)

65%

70%

75%

80%

85%

0 0.1 0.2 0.3 0.4 0.5 0.6

Output Current (A)

Effic

ienc

y

Turn On VIN = 12 V; 0.5-A LoadChannel 1: VOUT; Channel 2: VIN

Efficiency

26 TPS40071: Buck Converter with Predictive Gate Drive™ Technology



Input Voltage 4.75 5/12 14 V

VOUT 1.76 1.8 1.84 V

IOUT 0 6 10 A


Output Ripple VIN = 5 V 16 mVPP

Efficiency VIN = 5 V 94 %

DescriptionThe TPS40071EVM-001 evaluation module (EVM) is a synchronous buck converter which utilizes Predictive Gate Drive (PGD) to maximize conversion efficiency by minimizing the body diode conduction loss. The use of theTPS40071 midrange input synchronous buck controller allows the EVM to deliver 10 A from a bus voltage ranging from 5 to 14 V. The output voltage is originally set to 1.8 V, but can also be configured to provide 1.2 V to 3.3 V at a load current up to 10 A by changing one surface mount resistor.



U1TPS40071PWP

12345678

161514131211109

J1

C132.2 nF

R675 kΩ R9

1.4 k Ω

R40 Ω

C91 µF

C110.1 µF

C1547 µF

C1647 µF

C1747 µF

C180.1 µF

Q1

Q2

C1222 µF

C80.1 µF

C100.1 µF

D1BAT54

C1422 µF

C1470 µF

C710 pF

C3 10nF

R10

R5

1.87 kΩ

C5

8.2 nF

C4 470 pF

330 kΩ

R11 0 Ω

R12

20 Ω

R7 25.5 kΩ

R316.2 kΩ

R2 165 kΩ

R1 10 kΩ

C2 0.1µF

R8100 Ω

C88.2 nF

TP7

TP2TP4

TP11

TP3 TP6

TP8

TP5

TP1

TP9

TP10

L11.6 µH

J1

2

1

2 2

1

(+)

(–)

+

KFFRTBPSSYNCSGNDSSVFBCOMP

ILIMVDD

BOOSTHDRV

SWDSP

LDRVPGND

1

2(+)

(–)

PwrPd17

VIN = 5 - 12 V

Power Good VOUT = 1.8 V



TPS40071: Buck Converter with Predictive Gate Drive™ Technology 27

Test Results

Efficiency with Vout = 1.8 V

82

84

86

88

90

92

94

96

0 5 10 15Iout (A)

Vin = 12 V Vin = 8 V Vin = 5 V


90

91

92

93

94

95

96

97

98

0 5 10 15Iout (A)

Eff (

%)

Vin = 12 V Vin = 8 V Vin = 5 V

Vin = 5 V

-20

-10

0

10

20

30

40

50

10 100 1000 10000 100000Frequency (Hz)

Gain

(dB)

0

30

60

90

120

150

180

210

Gain (dB) Phase (deg)


78

80

82

84

86

88

90

92

94

0 5 10 15Iout (A)

Eff (

%)

Vout = 1.2 V Vout = 1.8 V Vout = 3.3 V

Efficiency with VOUT = 1.2 V Transient Response

Efficiency with VOUT = 3.3 V

Efficiency with VOUT = 1.8 VLoop GainVOUT = 5 V

Vin = 12 V

-20

-10

0

10

20

30

40

50

10 100 1000 10000 100000Frequency (Hz)

Gain

(dB)

0

30

60

90

120

150

180

210

Gain Phase

Phase Frequency ResponseVOUT = 12 V

28 TPS51020: Dual Output Buck Converter - Synchronous Dual, DDR Selectable Controller



Input Voltage 9 12 18 V

Output Voltage 1 4.85 5.00 5.15 V

Output Voltage 2 3.25 3.35 3.45 V




Output Ripple Voltage 1 VIN = 12 V; IO = 14 A 25 50 mVPP

Output Ripple Voltage 2 VIN = 12 V; IO = 10 A 20 33 mVPP

Efficiency 1 VIN = 12 V; IO = 6 A 95 %

Efficiency 2 VIN = 12 V; IO = 6 A 93 %

Description

This reference design uses the TPS51020 in a dual synchronous buck application thatprovides output voltages of 5 V/14 A and 3.3 V/10 A from a wide 9-V to 18-V input. TheTPS51020 utilizes feed-forward voltage mode control to attain high efficiency withoutsacrificing line response. Each converter runs 180 degrees out of phase with respect tothe other, effectively reducing the input capacitor requirement. Other features of theTPS51020 are adjustable short circuit protection, selectable Autoskip operation forimproved light load efficiency, selectable DDR tracking option, and a built-in 5-V biasregulator.



VOUT2

VIN

VIN

VOUT1

VOUT1

VOUT2VOUT1

VOUT1

VOUT1

VREG5VREG5SKIPGNDVIN

DDRGND

ENBL1GNDGND

ENBL2

VOUT2V02

GND

++VINTRIP2GND

VOUT1REG5_IN

GND

VREG5

++ ++

++ ++

VBST1OUT1_L

LL1OUT1_D

OUTGND1TRIP1

VINTRIP2_SNS

VREG5REG5_IN

OUTGND2OUT2_D

LL2OUT2_L

VBST2

INV1COMP1SSTRT1SKIPVO1DDRGNDREF_XENBL1ENBL2VO2PGOODSSTRT2COMP2INV2

C220.01 µF

C171 µF

C1922 pF

Q2Si7388DP

Q4Si7856DP

Q3Si7856DP

R1112.7 kΩR1318.2 kΩ

C351 µF

C2322 pF

D1MBR0530

R63.3 Ω

R230 Ω

R260 Ω

J7R1210 Ω

C210.1 µF16 V

L12.2 µH

C310 µF25 V

C410 µF25 V

C13330 µF6.3 V

C14330 µF6.3 V

C1547 µF6.3 V

C20150 µF20 V

J1

J3

J3

TP3

TP4

TP6

TP18

TP5

C510 µF25 V

123

R173.3 Ω

R24

0 ΩD2MBP0530

Q5Si7856DP

Q7Si388DP

C3610 µF6.3 V

J8

C280.01 µF

TP8

C180.01 µF

R16

C20.01 µF

R410 kΩ

R270 Ω

U1TPS51020DBTR8

1 MΩ

C6100 pF

R320.5 kΩ

R2100 kΩ

R12 kΩ

C11000 pF

R10100 kΩ

R9100 k

Ω

R1810 kΩ

R2134 kΩ

C410.01 µF

C37100 pF

R222 kΩ

C421000 pF

R20100 kΩ

R1951.1 Ω

TP11

J5

J4

J2

R551.1 Ω

TP1

123456

123456789

101112131415

302928272625242322212019181716

1234

123

123

321

321

321

321

123

5 V @ 14 AGND

9 V - 18 VINGND

3.3 V @ 10 AGND

12

12

21

C26330 µF6.3 V

C27330 µF6.3 V

C2847 µF6.3 V

L22.2 µH

TP9

C4010 µF25 V

C3910 µF25 V

R25Open

Note:1. For fixed frequency operation, connect SKIP to VREG5.2. For Sync Buck operation, connect DDR to VIN.3. To discharge outputs at turnoff, connect VOx to VOUTx, GND V0x if discharge is not required.4. Connect REG5_IN to 5 V output voltage.5. Connect TRIP2 to VIN for sync buck output.

123

TP2

TP7

freq. = 270 KHz1 MΩ



TPS51020: Dual Output Buck Converter - Synchronous Dual, DDR Selectable Controller 29

Test Results

Phase

Gain

5-V Output RippleVIN = 12 V; IO = 14 A, 20 mV/div

3.3-V Output RippleVIN = 12 V; IO = 10 A, 20 mV/div

5-V Control LoopVIN = 12 V; IO = 14 A

5-V Transient ResponseTop Trace: 5 VOUT at 100 mV/divBottom Trace: IO at 5 A/div

90.0%

90.5%

91.0%

91.5%

92.0%

92.5%

93.0%

93.5%

94.0%

94.5%

95.0%

0 2 4 6 8 10 12 14 16

Output Current (A)

Effic

ienc

y

5 V 3.3 V

Turn on: VIN = 12 V; 0-A Loads Efficiency

30 TPS40060: Buck Converter - Wide Input Range, Synchronous Controller



Input Voltage 10 55 V


Load Current 0 4 A



Efficiency VIN = 12 V; IO = 3 A 90 %

DescriptionThe TPS40060EVM evaluation module (EVM) is a high-efficiency, wide inputrange synchronous buck converter providing a fixed 3.3-V output at 4 A from a 10-V to 55-V input. The EVM is designed to start up from a supply, so no addi-tional bias voltage is required for start-up directly from the supply. The moduleuses the TPS40060 with P-channel, high-side MOSFET.

TPS40060EVM works over the full input range of the TPS40060 to produce aregulated 3.3-V output at up to 4 A of load current. Using lossless RDS(ON)current sense and a high-side, P-channel MOSFET simplifies the circuit designwithout sacrificing performance.

The evaluation module provides test points for input voltage, output voltage, keywaveforms and a 50-Ω connection point in the feedback loop for non-invasivemeasurements of the feedback loop along with an oscilloscope jack for easymeasurements of output ripple.



U1TPS4006xPWP

KFFRTBP5SYNCSGNDSS/SDVFBCOMP

ILIMVIN

BOOSTHDRV

SWBP10LDRV

PGND

1

2

3

4

5

6

7

8

16

15

14

13

12

11

10

9R1

1.52 kΩ

+

TP1

TP2

J1

J2

L17.8 µH

TYP7

TYP6

TYP4TYP3

TYP5

C1470 µF

C2680 µF

DIBAS16

C131.0 µF

C90.1 µF

R182.0 Ω

R853.8 kΩ

C100.1 µF

C80.1 µF

C121.0 µF

C3 0.1 µF

C4 3.3 nF

C6 39 pF

C7 3900 pF

C5 10 nF

R5

15.4 kΩ R7 402 Ω

R9

49.9 Ω

R11

10 Ω

R4

806 kΩC11 39 µF

R12

73.2 kΩ

+ C1547 µF

C1610 µF

C170.1 µF

C1470 µF

TP86.04 kΩ

Evaluation Module - TPS40060EVM


TPS40060: Buck Converter - Wide Input Range, Synchronous Controller 31

Test Results

Efficiency VIN = 10 to 55 V; IOUT = 0-4 A

TPS40060EVM-002 Efficiency

70.0%

75.0%

80.0%

85.0%

90.0%

95.0%

0 0.5 1 1.5 2 2.5 3 3.5 4 4.5Load Current (Amperes)

Effic

ienc

y

55 V 42 V 36 V 24 V 16 V 10 V

Loop Response Gain and Phase Plot

Loop Response of TPS40060EVM-002

-40

-20

0

20

40

60

1.00E+01 1.00E+02 1.00E+03 1.00E+04 1.00E+05 1.00E+06Frequency (Hz)

Gai

n (d

B)

-80

-30

20

70

120

10 V 4 A Gain 55 V 4 A Gain 10 V 4 A Phase 55 V 4 A Phase

32 TPS40130: 2-Phase Buck Converter - Synchronous Controller with Integrated Drivers



Input Voltage 10 - 14 V

Output Voltage R14 = 8.88 kΩ 0.7 - 3.3 V

Load Current VIN = 14 V; IO = 0 A 40 A

Ripple Frequency 660 kHz



DescriptionThe TPS40130EVM-001 evaluation module (EVM) is a high-efficiency, two-phasesynchronous buck converter providing a fixed 1.5 V output at up to 40 A from a12-V input bus. The EVM is designed to start up from a single supply, so noadditional bias voltage is required for start-up. The module uses the TPS40130high-frequency two-phase controller.



+ + + + + +

U1TPS40130DBT

123456789

101112131415

302928272625242322212019181716

R155.11 Ω

R94.32 kΩ

C240.1 µC1

22 µ

C70.1 µ

C14220 µ

C12220 µ

C23220 µ

C260.1 µ

C271.0 n

C20220 µ

C7220 µ

C16220 µ

C181.0 µ

C61.0 n

R52.2 Ω

R102.7 Ω

R112.7 Ω

R125.11

Ω

R165.11 Ω

R222.7 Ω

R26 2.7 Ω

R282.2 Ω

R290 Ω

R27

0 Ω

R23 10 kΩ

R24

10 kΩ

R2010 Ω

R218.25 kΩ

R191.0 kΩ

R148.66 kΩ

R249.9 Ω

R410 kΩ

R18 2.21 kΩ

R8 39.2 kΩ

R1 2.94 kΩ

R8 10 kΩ

R7R135.11 Ω

R3011.5 kΩ

R311.62 kΩ

C281.0 n

C25 1.0 µ

C1910 n

C150.1 µ

C21 3.3 n

C22 1.0 µ

C13 100 n

C9 1.0 nC10 1.0 n

C11 C5

C30.1 µ

C447 p

R30 Ω

C222 µ

R264.32 kΩ

R175.11 Ω

C80.1µ

L20.68 µH

L10.68 µH

C2922µ

C3022µ

Q4

Q5

Q3

Q1 Q2 Q6

1 Not used on PCB

111

2 All capacitor values given in farads unles otherwise specified

3 All resistor values given in ohms unless otherwise specified

LDRV1VN5SW1HDRV1BOOT1OVSETVOUTGSNSDIFFCS1CRST1COMPVREF+EAFB

PGNDLDRV2

SW2HDRV2BOOT2

SSUVLO

BP5AGND

CS2CSRT2

RTPGOOD

ILIMEN/SYNC

1 1

1 1 1 1

1

1 1

VNS

GND2

ENABLE

TP11ENABLE

TP12A_GND

TP13PW_GD

TP14A_GND

REF

FB

DIFFOUT

SS

SS

VNS

VNS VNS

VN2

VN2

GND

ISENSE 1 ISENSE 2

VN1

J1TP212 V_IN1+

TP612 V_IN1–

TP81 V5_OUT–

TP7HI_DRV1

TP1LO_DRV1

TP3LOOP INJECTION

TP4A

D1

TP5A_GND

TP17LO_DRV2

TP10SOFT START

1 V5_OUT_RTN12 V_IN1

TP1612 V_IN2+

TP15HI_DRV2

TP1812 V_IN2–

12 V_IN21 V5_OUT 1 V5_OUT_RTN1 V5_OUT_SNS

TP91 V5_OUT+

J2 J3 J4 J5 J6



TPS40130: 2-Phase Buck Converter - Synchronous Controller with Integrated Drivers 33

Test Results

Line Regulation @ 20 A Load

1.505

1.507

1.509

1.511

1.513

1.515

10 11 12 13 14

Input Voltage

Out

put V

olta

ge

Line Reg

Load Regulation

1.505

1.507

1.509

1.511

1.513

1.515

0 10 20 30 40

Output Current

OU

tput

Vol

tage

10 V In 12 V In 14 V In

HPA087A Efficiency

80

82

84

86

88

90

92

4 14 24 34Output Current

Effic

ienc

y

Vin 10 V Vin 12 V Vin 14 V

Efficiency Transient Response: 5-55 A at 3A/ms, I1V5_OUT (10 A/div),V1V5_OUT(rip) (20 mV/div), Time 10 ms/div

Load Regulation

Line Regulation VIV5_OUT = 20 A

Negative Transient: 5-55 A at 3A/ms, I1V5_OUT (10 A/div),V1V5_OUT(rip) (20 mV/div), Time 10 ms/div

34 UCC38C4X: Boost Converter - Low-Power PWM Controller




Output Voltage 23.25 24 24.73 V

Load Current 0 2 3.5 A


Output Ripple Voltage VIN = 12 V; IO = 3.5 A 200 mVPP


VIN = 12 V; IO = 3 A 94 %

DescriptionThis reference design uses the UCC38C43 in boost topology to convert from +12 V to +24 V at 3.5 A. The boost topology with Schottky output diodesenables PMP781 to achieve efficiencies greater than 95%. One note of cautionwith this topology is that it does have short-circuit protection. A short on theoutput shorts through the inductor and output diode. Even if current mode con-trol were added, this path still exists. If short circuit protection is needed, usinga different topology such as flyback, SEPIC or a current limit circuit such as afuse, polyfuse or hot swap should be considered.


Datasheets, User’s Guides, Samples:www.ti.comPart Number Search: UCC38C4X

+ + + + +

U1UCC38C43

COMPFBCSRT/CT

VREFVDDOUTGND

1234

8765

J1VIN 12 V ±5%

MMBT2907Q100 R100

100 kΩ

VREF

R2OPEN

C10OPEN

R622.6 kΩ

C12OPEN

R80 Ω

C131 µF

R92.61 kΩ

R121.5 kΩ

VREF

R13150 kΩ

C1718000 pF

C1827000 pF

R14100 kΩ

R1010 Ω

C3.1 µF

C100.1 µF

R510 Ω

C111 µF

C910 µF16 V

L122 µH

Q2IRL1104S

D1MBRB2535CTL

C4330 µF35 V

C5330 µF35 V

C6330 µF35 V

C7330 µF35 V

C8330 µF35 V

C22.2 µF35 V

J224 V @ 3.5 A (max)GND

12

1

2



UCC38C4X: Boost Converter - Low-Power PWM Controller 35

Test Results

Phase

Gain

PMP781 EFFICIENCY24 VOUT

82.083.084.0

85.086.087.088.0

89.090.091.092.0

93.094.095.0

0.3 0.5 0.8 1.0 1.3 1.5 1.8 2.0 2.3 2.5 2.8 3.0 3.3 3.5Output Current (Amps)

12 VIN

Turn On VIN = 12 V; No LoadChannel 1: VIN; Channel 2: VOUT Efficiency

Transient ResponseTop Trace: VO at 1 V/div; Bottom Trace: IO at 1 A/div FET Drain Voltage

Output Ripple VIN = 48 V; IO = 3 A

Control LoopVIN = 12 V; IO = 3 A

36 UCC3809: Isolated Flyback Converter - Primary Side Controller





Load Current 0 5 A




DescriptionThis reference design uses the UCC3809, a current mode controlled synchronousflyback converter that can deliver 5 A of continuous output current at 3.3 V from an input range of 36 to 75 VDC. The UCC3809 provides all necessaryfunctions for the control of isolated off line and DC/DC power converters. Thisdesign results in a highly efficient, small, cost-effective solution for low-powerisolated applications. Peak efficiency using the UCC3809 and synchronous rectification are greater than 88%.


Datasheets, User’s Guides, Samples:www.ti.comPart Number Search: UCC3809

J412

8 7 6 5

3 2 1

5 6

7 8

1 2

3

+ +

2 3 6 7

123

J1

-48 VIN-48 VIN _RTN

EARTH_GND

C12200 pF2 kV L1

1.17 mH

C30.47 µF

100 V 13

24

C72200 pF2 kV

C30.47 µF

100 V

C433 µF100 V

R344.2 kΩ0.25 W

R1100 kΩ0.25 W

C50.1 µF100 V

+

D2MURS120T3

T1G027270

10

2

9

13

84

5

67

D418 V

D518 V

D1BAS16

R21 kΩ

R40 Ω

D36.8 V

Q1MMBT3904

C60.1 µF

VSB

C80.1 µF

R2310 kΩ

Q2Si4848DY

C1122 µF6.3 V

C1222 µF6.3 V

C1322 µF6.3 V

C14330 µF6.3 V

C15330 µF6.3 V

C161 µF

1 2

J23.3 V/5 AGND

R1510 kΩ

R1830.1 kΩ

C21OPEN

C220.018 µF

R1630.1 kΩ

U3TL431AID

VSB

R143.01 kΩ

R111 kΩ

R103.01 kΩ

D7BAS 18

C241 uF

C230.047 µF

R200 Ω

U2H11A817A

1

2

4

3

C172200 pF

2 kV

R70.68 Ω1 W

Q3Si4848DY

D6BAS 16

R520 Ω

R410

4

C910 µF16 V

C101 uF

U1UCC3809D-2

1234

8765

R811.3 kΩ

R811.3 kΩ

C180.01 µF

Q4MMBT3904

R224.12 kΩ

C25220 pF

R211 kΩ

C20560 pF

ON/OFFRTN

R183.01 kΩ

R127.50 kΩ

C180.1 µF

Q5MMBT3804

C26220 pF

R17475 Ω

R13475 Ω

FBSSRT1RT2

REFVDDOUTGND



UCC3809: Isolated Flyback Converter - Primary Side Controller 37

Test Results

Phase

Gain

PMP665 Efficiency

70.0%

80.0%

90.0%

100.0%

0.05 1.00 2.00 3.00 4.00 5.00 6.00Iout, A

36 VIN 48 VIN 60 VIN

Turn On VIN = 48 V; No Load Efficiency

Transient ResponseTop Trace: VO at 100 mV/div; Bottom Trace: IO at 2 A/div

Output Ripple VIN = 48 V; IO = 5 A

Control LoopVIN = 5 V; IO = 15 A

38 UCC3813: Triple-Output Flyback, Low-Power Economy PWM Controller


SpecificationsParameter Min Typ Max Units

Input Voltage +5 +24 V

VOUT1 +11.40 +12 +12.6 V

IOUT1 0.25 1.00 A

VOUT2 +4.75 +5.00 +5.25 V

IOUT2 0 0.50 A

VOUT3 –4.75 –5.00 –5.25 V

IOUT3 0 0.30 A


DescriptionThe UCC3813-5 controller is used in a continuous flyback converter to generatethree output voltages. The outputs are +12 V/1 A, +5 V/0.5 A and –5 V/0.3 A.The input voltage ranges from 5 V to 24 V. The UCC3813 family of high-speed,low-power integrated circuits contain all of the control and drive componentsrequired for off line and DC/DC fixed-frequency current mode switching powersupplies with minimal parts count.



+

+

++++

+

+

+

+++

+

VINGND

J1 5 V to 24 V

C1747 µF

C1810 µF

C1910 µF

C2010 µF

C2110 µF

VIN

R136.49kΩ

R12100 kΩ

C220.1 µF

D2

MURS120

R1810 kΩ

R1711.8 k

C305600 pF

R185.62 kΩ

C31.068 µF

R202 kΩTP5

TP6 TP7

R212 kΩ

C34220 pF C36

330 pF

R22

10 kΩ

R23

0 Ω

U5UCC3813-5

138 kHzC34.22 µF

C32.1 µF

1234

8765

R14

4.7 Ω

Q4SUD30N04-10

R150.0112 Ω

R19

10 Ω

D6

BAS16C3322 µF

T1

3.15 µH

D2

MURS120C14

150 µFC15

150 µFC16

150 µFR115.1 kΩ

C13150 µF

C25150 µF

C24150 µF

C23150 µF

U3UA78M05CKTP

J4

J5

J6

+5 V @ 0.5 AGND

-5 V @ 0.3 AGND

+12 V @ 1 AGND

12

12

12

D4

MURS120U4

UA79MB50KTPL2

2 µH

C26100 µFC29

100 µFC28

100 µFC27

100 µF

D5

MURD320

IN OUTCOMP

IN OUTGND

COMP REFFB VCCCS OUTRC GND

1

8

9

10

6

74

25

3T

3T

8T

8T

13T



UCC3813: Triple-Output Flyback, Low-Power Economy PWM Controller 39

Regulation and EfficiencyVIN IIN VOUT1 IOUT1 VOUT2 IOUT2 VOUT3 IOUT3 Efficiency(V) (A) (V) (A) (V) (A) (V) (A) (%)

5.00 4.46 +11.93 1.008 +4.94 0.400 –5.03 0.400 71.8

12.01 1.761 +11.94 1.008 +4.94 0.400 –5.03 0.400 75.7

24.03 0.899 +11.94 1.008 +4.94 0.400 –5.03 0.400 74.1

4.97 2.133 +11.94 0.500 +4.97 0.200 –5.03 0.200 75.2

12.00 0.876 +11.95 0.500 +4.97 0.200 –5.03 0.200 75.9

24.04 0.449 +11.95 0.500 +4.97 0.200 –5.03 0.200 73.9

5.00 1.069 +11.94 0.250 +4.98 0.100 –5.03 0.100 74.4

12.04 0.446 +11.95 0.250 +4.98 0.100 –5.03 0.100 74.1

24.02 0.232 +11.95 0.250 +4.98 0.100 –5.03 0.100 71.4

Test Results

Calculated Loop Gain

10 100 1 .103

1 .104

1 .105

50

0

50

100

Loop Gain (T), Vin = 4.75V

20 log T f i( )( )⋅

f i

10 100 1 .103

1 .104

1 .105

200

100

0

100

Loop Gain Phase Margin, Vin = 4.75V

360

2 π⋅arg T f i( )( )⋅

f i

40 UCC2580 PWM: Active-Clamp Forward Converter


SpecificationsParameter Test Conditions Min Typ Max UnitInput Voltage –36 –48 –72 VOutput Voltage 3.2 3.3 3.4 VLoad Current 0 30 ASwitching Frequency 300 kHzOutput Ripple Voltage VIN = –48 V; IO = 30 A 25 mVpp

Efficiency VIN = –48 V; IO = 10 A 93 %VIN = –48 V; IO = 30 A 89 %

Description

This reference design uses the UCC2580 in an active-clamp forward converter that candeliver up to 30 A of continuous current at 3.3 V from an input range of –36 V to –72 V.The active-clamp topology with self-driven secondary synchronous MOSFETs allowsPMP 206 to achieve efficiencies greater than 90%. The design includes remote senseconnections for point-of-load regulation.



+ + +

Q2IRF6216

Q1Si7846DP

8 7 6 5

3 2 1

REF

R12

49.9 kΩD312-V

Q3FZT655

C810 µF

BIAS

D2

MMSD914

L1PA0373

T1PA0369

1

6

11

7

2

4

9

8

VOUT = 3.3 V @ 30 A

VOUT+

VOUT-

C10210 µF6.3 V

C1180 µF6.3 V

C12180 µF6.3 V

C11180 µF6.3 V

Q9HAT2099H

Q8HAT2099H

C2 0.1 µF

200 V

R20.1 Ω1 W

R31kΩ

R1030.1 Ω

1 W

SENSE-

VIN-

VIN+

C221 µF100 V

C231 µF100 V

C241 µF100 V

D100

BAT54

C1001 µF D101

5.1-V

R1011 kΩ

C10110 µF

Q100MMBT3904

BIAS2

–36 V to –72 V Input

Q6HAT2099H

Q5HAT2099H

BIAS2 VOUT+

VOUT+

BIAS2

BIAS

BIAS

3 2 1 3 2 1

3 2 1 3 2 1

5 5

5

4 4

5

4 4

DELAYLINEVDDOUT1PGNDOUT2CLKGND

161514131211109

12345678

SHDNSS

REFEAIN

EAOUTOSC1OSC2

RAMP

REF

REF

TP5

TP4

TP7

U2TLV431ACDBV5

U6TLV431ACDBV5

SENSE+

SENSE–

SENSE–

ON/OFF

1

2

4

3

1

2

4

3

C90.1 µF

R926.7 kΩ

R8

150 kΩR4

200 kΩU1

UCC2580D-1

C6 0.1 µF

C5 1 µF

C103 100 pF

R25 10 kΩR26

10 kΩ

U5H11A817B

C16100 pF

R28499 Ω

R10210 Ω

R1634.8 kΩ

U7H11A817A

C1041 µF

C3100 pF

C191000 pF

C4330 pF

R645.3 kΩ

R32150 kΩ

C170.1 µF

R293.48 kΩ

Q4MMBT3904

U4TL331DBV

R319.53 kΩ

R414.99 kΩ R21

100 kΩR30 10 kΩ

BAS16

D4

R10010kΩ

C7 1 µF

16 V

D9BAT54

R271 kΩ

R2423.7 kΩ

C143300 pF

C18100 pF

C131000 pF

C1533 pF

R23750 Ω

R2249.9 kΩ

R2010 Ω

R3730.1 kΩ

R3310 kΩ

R3810 kΩR35

499 ΩC106

4700 pF2 kV

R344.53 kΩ

R1910 Ω

C1051 µF

R54.02 kΩR7

100 kΩ

1

3 4

5

2



UCC2580 PWM: Active-Clamp Forward Converter 41

Test Results

404550556065707580859095

100

0 5 10 15 20 25 30

IOUT - Amps

Effic

ienc

y - %

36.0 V 48.0 V 72.0 V

Turn On VIN = –48 V; No LoadTop Trace: Enable at 5 V/div;Bottom Trace: Vout at 2 V/div

Efficiency

PMP206 Safe Operating Area

20.0

30.0

40.0

50.0

60.0

70.0

80.0

90.0

0.0 5.0 10.0 15.0 20.0 25.0 30.0

Nat conv 100LFM 200LFM 300LFM

Phase

Gain

Output RippleVIN = –48 V; IO = 30 A

Control LoopVIN = –48 V; IO = 30 A

Transient ResponseTop Trace: VO at 50 mV/div;Bottom Trace: IO at 10 A/div

SOA for –48-V Input

42 bq24103: Synchronous, Switch-Mode Lithium-Ion Charger


SpecificationsParameter Min Typ Max Unit

Input Voltage 4.35 16 V

Charge Current 2 A

Sync PWM 1.1 MHz

DescriptionThe bq241xx is a synchronous, switch-mode battery charger with internal powerFETs capable of supplying up to 2 A of charge current. It enables higher chargecurrent while reducing the amount of heat generated, making it ideal for use in systems that incorporate one-, two- and three-series cell lithium-ion or lithium-polymer battery packs. Applications include portable DVD and mediaplayers, smart handhelds, medical, industrial and other portable equipment. The integrated PWM controller operates at a fixed frequency of 1.1 MHz, allowing the use of a small inductor and output capacitor. The IC delivers high-accuracy current and voltage regulation for precise battery charging, over-voltage protection, multiple charge status outputs for charge progress indicationand charge termination. Charge termination is based on a minimum currentlevel. A programmable charge timer provides a safety backup for termination.Other versions of the IC also allow the portable system’s microcontroller to control the battery charging profile and termination with digital inputs to the IC.


Datasheets, User’s Guides, Samples:www.ti.comPart Number Search: bq24103

AdapterPresent

C50.1 µF

R81.5 kΩ

• VIN = 12 V

• Icharge = 1.33 A, Iprecharge = 0.13 A

• Typical Effciency: 91%

• Surface Temp (Assume Amb ient Temp 25 °C): 50~55 °C at 91% Efficiency

Charge

R71.5 kΩ

Done

R61.5 kΩ

L110 µH

R10.1 Ω/0.5 W

C10.1 µF

C40.1 µF

C210 µF

R45.1 kΩ

R50 Ω

R37.5 kΩ

R27.5 kΩ

R9

10 kΩ

C30.1 µF

VIN

VIN VIN VIN

VIN

IN

IN

VCC

CE

PG

STAT1

STAT2

TTC

VTSB

VSS

OUT

OUT

PGND

PGND

SNS

BAT

CELLS

TS

ISET1

ISET2

bq24103

Pack+

Pack–

Temp

VTSB

Evaluation Module - bq24103EVM


bq24103: Synchronous, Switch-Mode Lithium-Ion Charger 43

Test Results

Efficiency vs. Output Charge Current Efficiency vs. Output Charge Current

IO(CHARGE) = Output Charge Current - A IO(CHARGE) = Output Charge Current - A

QFN Package

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