High-Power & Low-Voltage Audio Power Amplifier: Audio ...NJU7089 Ver1. 4 e - 1 - HIGH-POWER & LOW-VOLTAGE AUDIO POWER AMPLIFIER GENERAL DESCRIPTION The NJU7089 is an audio power amplifier

NJU7089

- 1 - Ver1.4e

HIGH-POWER & LOW-VOLTAGE AUDIO POWER AMPLIFIER

■ GENERAL DESCRIPTION

The NJU7089 is an audio power amplifier designed for telephone applications. No external coupling capacitors are required because of the differential outputs. The closed loop gain is adjusted by two external resistors, and a SD pin permit power down with muting the input signal.

The NJU7089 improves high output power compared with other amplifier.

■ FEATURES

Operating Voltage V+=1.8 to 5.5V Operating Current IDD1=3.0mA typ. (V+=5V,RL=, no signal) IDD1=2.5mA typ. (V+=3V,RL=, no signal) Output Power P0=1.2W typ. (V+=5V,RL=8,THD=1%)

P0=500mW typ.(V+=3.3V,RL=8,THD=1%) Supply Current in Shutdown Mode Thermal Shutdown Circuit Pop Noise Suppression Circuit Over Current Protection Circuit C-MOS Technology Package Outline VSP8 / SSOP20-C3 / ESON8-V1 / HTSSOP24-P1

■ PIN CONFIGURATION & BLOCK DIAGRAM

■ PACKAGE OUTLINE

NJU7089R

NJU7089VC3

NJU7089KV1

NJU7089VP1

BIAS TSDSD

Bypass

+IN

-IN

OUTB

OUTA

V+

GND

NJU7089

- 2 -

■ PIN CONFIGURATION

VSP8 ESON8-V1

Top View Bottom View *(1) The PAD in the center part on the back is connected with the internal GND,

therefore it connects to GND

No. Symbol Function

1 SD Shutdown Enable 2 Bypass Reference Voltage 3 +IN Noninverted Input 4 -IN Inverted Input 5 OUTA Output A 6 V+ Supply Voltage 7 GND Ground 8 OUTB Output B

SSOP20-C3

No. Symbol Function No. Symbol Function

1 NC No Connect 11 NC No Connect 2 NC No Connect 12 NC No Connect 3 NC No Connect 13 NC No Connect 4 SD Shutdown Enable 14 OUTA Output A 5 Bypass Reference Voltage 15 V+ Supply Voltage 6 +IN Noninverted Input 16 GND Ground 7 -IN Inverted Input 17 OUTB Output B 8 NC No Connect 18 NC No Connect 9 NC No Connect 19 NC No Connect

10 NC No Connect 20 NC No Connect

1 432

8 567

8 567

1 4321 8

54

1 20

1110

*(1)

NJU7089

- 3 -

HTSSOP24-P1 Top View Bottom View *(2) The PAD in the center part on the back is connected with the internal GND,

therefore it connects to GND

No. Symbol Function No. Symbol Function

1 NC No Connect 13 NC No Connect 2 NC No Connect 14 NC No Connect 3 NC No Connect 15 NC No Connect 4 NC No Connect 16 NC No Connect 5 SD Shutdown Enable 17 OUTA Output A 6 Bypass Reference Voltage 18 V+ Supply Voltage 7 +IN Noninverted Input 19 GND Ground 8 -IN Inverted Input 20 OUTB Output B 9 NC No Connect 21 NC No Connect

10 NC No Connect 22 NC No Connect 11 NC No Connect 23 NC No Connect 12 NC No Connect 24 NC No Connect

1 24

1312

124

13 12

*(2)

NJU7089

- 4 -

■ ABSOLUTE MAXIMUM RATINGS (Ta=25C) PARAMETER SYMBOL RATINGS UNIT

Supply Voltage V+ +7 V

Power Dissipation PD

570 *1) / 770 *2) (VSP8) 970 *1) / 1400 *2) (SSOP20-C3) 570 *3) / 1700 *4) (ESON8-V1)

1000 *5) / 3000 *6) (HTSSOP24-P1)

mW

Output Peak Current Iop 600 mA Input Voltage Range VIN -0.3 to V++0.3 *7) V Operating Temperature Range Topr -40 to +85 C Storage Temperature Range Tstg -40 to +150 C

*1) EIA/JEDEC STANDARD Test board (76.2 x 114.3 x 1.6mm, 2layers, FR-4) mounting. *2) EIA/JEDEC STANDARD Test board (76.2 x 114.3 x 1.6mm, 4layers, FR-4) mounting. *3) EIA/JEDEC STANDARD Test board (76.2 x 114.3 x 1.6mm, 2layers, FR-4) mounting. The PAD connecting to GND in the center part on the back *4) EIA/JEDEC STANDARD Test board (76.2 x 114.3 x 1.6mm, 4layers, FR-4, Applying a thermal via hole to a board based on JEDEC standard JESD51-5)

mounting. The PAD connecting to GND in the center part on the back *5) EIA/JEDEC STANDARD Test board (114.5 x 101.5 x 1.6mm, 2layers, FR-4) mounting. The PAD connecting to GND in the center part on the back *6) EIA/JEDEC STANDARD Test board (114.5 x 101.5 x 1.6mm, 4layers, FR-4, Applying a thermal via hole to a board based on JEDEC standard JESD51-5)

mounting. The PAD connecting to GND in the center part on the back *7) SD, IN+, IN-, OUTA, OUTB terminals.

■ RECOMMENDED OPERATING VOLTAGE RANGE (Ta=25C) PARAMETER SYMBOL TEST CONDITION MIN. TYP. MAX. UNIT

Operating Voltage Range V+ - 1.8 3.0 5.5 V ■ ELECTRICAL CHARACTERISTICS Amplifier (Ta=25C,V+=5V,GV=6dB,f=1kHz,RL=8,Active)

PARAMETER SYMBOL TEST CONDITION MIN. TYP. MAX. UNIT Operating Current 1 IDD1

No signal, RL= - 3.0 6 mA Operating Current 2 IDD2 No signal, RL=, VSD=0.25V - - 2 A Output Power 1 PO1 THD1% 0.9 1.2 - W Output Power 2 PO2 V+=3.3V, THD1% 375 500 - mW Output Power 3 PO3 V+=1.8V, THD1% - 125 - mW Total Harmonic Distortion (THD+N) THD+N PO=1W - 0.1 - %

Shutdown Attenuation ATTSD Vin=1Vrms, Shutdown - -135 - dB Supply Voltage Rejection Raito PSRR Vripple=100mVrms - 55 - dB

Output Offset Voltage VOD No signal - - 35 mV (Ta=25C,V+=3V,GV=6dB,f=1kHz,RL=8,Active)

PARAMETER SYMBOL TEST CONDITION MIN. TYP. MAX. UNIT Operating Current 1 IDD1

No signal, RL= - 2.5 4 mA Operating Current 2 IDD2 No signal, RL=, VSD=0.25V - - 2 A Total Harmonic Distortion (THD+N) THD+N PO=400mW - 0.1 - %

Shutdown Attenuation ATTSD Vin=500mVrms, Shutdown - -130 - dB Supply Voltage Rejection Raito PSRR Vripple=100mVrms - 55 - dB

Output Offset Voltage VOD No signal - - 35 mV VSD: SD Terminal Voltage

NJU7089

- 5 -

Mode Control (Ta=25C) PARAMETER SYMBOL TEST CONDITION MIN. TYP. MAX. UNIT

High Level Input Voltage VIH - 1.5 - V+ V Low Level Input Voltage VIL - 0 - 0.25

■ CONTROL TERMINAL EXPLANATION

MODE CONTROL SIGNAL (SD Terminal) STATUS Shutdown L(=VIL) IC is standby.

Active H(=VIH) IC is active.

NJU7089

- 6 -

BIAS TSD

-IN

+IN

V+

OUTA

OUTBBypass

SD

GND

RL=∞

20kΩ

20kΩ

0.39uF

V+

+

1uF

V+

■ TEST CIRCUIT (IDD1, IDD2, VOD) ■ TEST CIRCUIT (PO1, PO2, PO3, THD+N, ATTSD)

BIAS TSD

-IN

+IN

V+

OUTA

OUTBBypass

SD

GND

RL=8Ω

Vin

V+

+

20kΩ

20kΩ

0.39uF

1uF

V+

NJU7089

- 7 -

■ TEST CIRCUIT (PSRR)

BIAS TSD

-IN

+IN

V+

OUTA

OUTBBypass

SD

GND

RL=8Ω

Vin

V++

20kΩ

20kΩ

0.39uF

1uF

V+

NJU7089

- 8 -

TERMINAL DESCRIPTION TERMINAL SYMBOL FUNCTION EQUIVALENT CIRCUIT VOLTAGE VSP8,

ESON8 SSOP

20 HTSSOP

24

1 4 5 SD Shutdown Enable

0V

2 5 6 Bypass Reference Voltage

V+/2

3 6 7 +IN Noninverted Input

V+/2

4 7 8 -IN Inverted Input

V+/2

5 8

14 17

17 20

OUTA OUTB

Output A Output B

V+/2

GND

OUTAOUTB 300Ω

20kΩ

V+

GND

-IN 300

V

GND

+IN 300Ω

V+

V+

GND

Bypass 300Ω

V+

75kΩ

50kΩ

V+

V+

GND

SD 300Ω

100kΩ

NJU7089

- 9 -

■ APPLICATION CIRCUIT

BIAS

+

TSDSD

Bypass

+IN

-IN

OUTB

OUTA 8ΩSpeaker

V+

GNDShutdown

Control

Cb

Ci RiVin

Rf

BIAS

+

TSDSD

Bypass

+IN

-IN

OUTB

OUTA 8ΩSpeaker

V+

GNDShutdown

Control

Cb

Ci RiVin-

Rf

Ci RiVin+

Rf

NJU7089

- 10 -

Technical Information ■ APPLICATION NOTES

The NJU7089 is a 1.2W mono bridge–tied-load [BTL] amplifier designed to drive a speaker with 8 impedance. The NJU7089 can run from a 1.8V to 5.5V supply. The voltage gain is set by the user-selected resister (Ri, Rf). The NJU7089 is equipped with a shutdown [SD] mode that will reduce the supply current and pop noise during the SD mode ON/OFF.

In this application note, detailed information on the usage of this IC and its operation are discussed.

1. Operating Overview

Fig.1 shows the NJU7089 internal circuit. It comprises of two power amps (Amp-A, Amp-B), a bias circuit, and a thermal shutdown[TSD] circuit. Pin 4 and Pin 3 are the inverting and noninverting terminal to Amp-A. A reference voltage is provided at Pin 2, which should be connected to Pin 3. Pin 5 is the output terminal to Amp-A. A second operational amplifier, Amp-A is configured with a fixed gain of Av=-1 and produces the inverted signal of Pin5. The NJU7089 outputs at Pin 5 and Pin 8 produce a bridged configuration output to which a speaker can be connected. Twice the output voltage and four times output power in a bridged amplifier are possible as compared to a single-ended amplifier. When a SD mode is active, the internal switch(SW) turns off to stop an internal bias current. As a result, a SD mode reduces the supply current. The external capacitor (Cb) and Internal resistance eliminate disturbing pop noise during the SD mode ON/OFF. (Ref. Page 3) The external capacitor (Cb) value depends on the turn-on time. (Ref. Page 7)

BIAS1

2

3

4

8

5

7

6

-

+

-

+

TSD

V+

VOUTA

VOUTB

GNDSD

Bypass

+IN

-IN

Ci0.39uF

Ri20kΩ

Cb1uF

Rf20kΩ

Cv10uF

SW

IrefRL

8Ω+

+

ShutdownInput

SupplyVoltage

Input Singnal

Amp-B

Amp-A

Fig1. Block diagram and Application circuit

NJU7089

- 11 -

Technical Information 2. External Component 2.1 Bypass Capacitor

Power source bypass capacitor (Cv) should have margin for temperature characteristics and the better characteristic in high frequency. Design to provide low impedance for the wiring between the IC and the capacitor.

2.2 Input Resistor and Feedback Resistor

The voltage gain is set by the user-selected resistor(Ri, Rf) [1].

)2

(20=i

f

RR

LogGv …… [1] *Gain setting for BTL output

Design to lower the resistance value for Ri and Rf, because of the increase in output noise voltage and disturbing pop noise. Ri forms a HPF with the input coupling capacitor (Ci). (Ref. 2.3) 2.3 Input Coupling Capacitor

The input coupling capacitor (Ci) is necessary for DC cut. Ci forms a HPF with Ri. The cutoff frequency is calculated using [2].

cii fR

C2

1 …… [2] *fc=Cut-off frequency

2.4 Bypass Capacitor for Reference Voltage

The capacitor (Cb) stabilzes DC bias voltage. As Cb becomes lager, PSRR and pop noise are improved but turn on time becomes longer.

Table 1 Cv,Ri,Rf,Ci,Cb,and RL has limits in below table.

Please set these component values in the ranges.

Component Function Default value Recommendation Ranges Cv Supply bypass capacitor 10uF 1uF<Cv Ri input resistor 20kΩ 10kΩ<Ri<50kΩ Rf feedback resistor 20kΩ 10kΩ<Rf<50kΩ Ci Input coupling capacitor 0.39uF 0.047uF<Ci Cb Bypass pin capacitor 1uF 0.1uF<Cb RL Load resistor(speaker) 8Ω 4Ω<RL

NJU7089

- 12 -

Technical Information 3. Pop Noise during SD mode ON/OFF NJU7089 builds anti-pop circuit, but Pop noise is dependent on the value of external elements.

3.1 Shutdown (SD terminal = Low) -> Active (SD terminal=High) BTL amplifier does not generate sound, if there is no voltage difference between two outputs. But, common power amplifier generates pop noise according to the voltage difference of IN- and IN+ resulting from the difference of the charge time of Ci and Cb. NJU7089 does not generate pop noise by changing amp1(Fig3) from amp2(Fig2), after Ci and Cb are charged.

Fig2. Voltage follower amplifier Fig3. Inverting amplifier

VOUTA

VOUTB

Bypass

Ci Ri

Cb

Rf

AmpB

AmpA

-

+

-

+

-

+

amp1

amp2

V+

IN-

IN+

INPUT

VOUTA

VOUTB

Bypass

Ci Ri

Cb

Rf

AmpB

AmpA

-

+

-

+

-

+

amp1

amp2

V+

IN-

INPUT

IN+

charge

charge

NJU7089

- 13 -

Technical Information The terminal voltage in application circuit and the relation of time are shown in Fig. 4.

Fig. 5 shows that the pop noise became large by the input terminal voltage difference resulting from

change of the time constant. In order to make small the pop noise which became large by increase of Rf, etc., it is necessary to

enlarge Cb and to make small Ci. (However, Cb influences a turn on time, and Ci influences a frequency characteristic.) Table2~6 show the value of Cb for realizing the pop noise at an application circuit.

0 0.25 0.5 0.75 1

Time[sec]

Term

inal

vol

tage

[5V

/div

]

0 0.25 0.5 0.75 1

Time[sec]te

rmin

al v

olta

ge[5

V/d

iv]

OUTA

SD

OUTB

OUTA-OUTB

IN+ ,IN-

OUTA

SD

OUTB

OUTA-OUTB

IN+ ,IN-

Small pop noise Large pop noise

Large voltage difference Small voltage difference

Fig4. Terminal Voltage at application circuit Fig5. Terminal Voltage at Rf=100kΩ

NJU7089

- 14 -

Technical Information

Table2 the value of Cb at Ri=10kΩ





10kΩ 20kΩ 30kΩ 40kΩ 50kΩ0.047uF 01uF 0.33uF 0.33uF 0.33uF 0.33uF

0.1uF 0.33uF 0.33uF 1uF 1uF 1uF0.39uF 1uF 1uF 2uF 2uF 3.3uF0.47uF 1uF 2uF 2uF 3.3uF 3.3uF

1uF 2uF 3.3uF 4.7uF 10uF 10uF

Rf

Cin




Rf

Cin




Rf

Cin




Rf

Cin




Rf

Cin

NJU7089

- 15 -

Technical Information 3.2 Active (SD terminal = High) -> Shutdown (SD terminal=Low) When changing to a shutdown, pop noise is very small, because the voltage of OUTA and OUTB falls steeply and simultaneously. (This theory is realized only BTL) 3.3 Cut-off frequency In order to make small the pop noise, it is necessary to make small Ci. But, The value of Ci affects the low frequency performance of the circuit, because Ci forms with Ri a high-pass filter.

iic CRπ

f2

1= (Hz)

0 0.25 0.5 0.75 1

Time[sec]

Term

inal

Vol

tage

[5V

/div

]

OUTA

SD

OUTB

OUTA-OUTB

Fig6. Terminal Voltage at Shutdown

OUTA and OUTB fall simultaneously

Pop noise is not generated

NJU7089

- 16 -

Technical Information 4. Turn on/off time

As Cb becomes smaller, turn on time becomes shorter but pop noise and PSRR become worse. Turn off time is always very short. (It does not depend on the value of Cb.)

Relationship of turn on time and the value of Cb are shown in Fig. 7~8.

)5.0

5.0ln(•Ω100•= +VkCT bON -- (sec)

5. PSRR vs Cb As Cb becomes lager, PSRR becomes good. Relationship of PSRR and the value of Cb are shown in Fig. 9~10.

Turn on time vs Cb V+=5V Vin=1Vrms f=1kHz RL=8Ω　Ta=25℃

0

100

200

300

400

500

600

0 1 2 3 4 5

Cb[uF]

Turn

on

time[

ms]

Turn on time vs Cb V+=3V Vin=0.5Vrms f=1kHz RL=8Ω　Ta=25℃

0

100

200

300

400

500

600

0 1 2 3 4 5

Cb[uF]

Turn

on

time[

ms]

Fig7. Turn on time vs Cb (V+=5V) Fig.8 Turn on time vs Cb (V+=3V)

PSRR vs Frequency V+=5V RL=8Ω　RIN=GND

0

10

20

30

40

50

60

70

1.E+01 1.E+02 1.E+03 1.E+04 1.E+05

Frequency[Hz]

PS

RR

[dB

]

PSRR vs Frequency V+=3V RL=8Ω　RIN=GND

0

10

20

30

40

50

60

70

1.E+01 1.E+02 1.E+03 1.E+04 1.E+05

Frequency[Hz]

PSR

R[d

B]

Fig9. PSRR vs Frequency (V+=5V) Fig10. PSRR vs Frequency (V+=3V)

Cb=2.2uF

Cb=1uF

Cb=0.47uF

Cb=0.1uF

Cb=2.2uF

Cb=1uF

Cb=0.47uF

Cb=0.1uF

NJU7089

- 17 -

0

500

1000

1500

2000

2500

3000

3500

-50 0 50 100 150

Technical Information 6. Power dissipation and Output Power

Pd is the maximum permissible power at Ta=25°C.Pd is dependent on the ambient temperature, which shown in Fig.11.

*1 The PAD connecting to GND in the center part on the back. *2 The PAD connecting to GND in the center part on the back. Applying a thermal via hole to a board.

Fig11. Power derating curves

Ambient Temperature [°C]

Pac

kage

Pow

er D

issi

patio

n [m

W]

VSP8 (2layers) ESON8 (2layers *1)

VSP8 (4layers)

SSOP20 (2layers)

HTSSOP24 (2layers *1)

SSOP20 (4layers)

ESON8 (4layers *2)

HTSSOP24 (4layers *2)

NJU7089

- 18 -

Technical Information Maximum output power can be determined from Power dissipation vs Output Power characteristics

with PD (ABSOLUTE MAXIMUM RATINGS). An example is shown in Fig.12.

Power Dissipation vs Output Power[W]V+=5V Gv=6dB RL=8Ω Ta=25°C BTL

0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0 0.2 0.4 0.6 0.8 1 1.2

Output Power[W]

Pow

er D

issi

patio

n[W

]

Fig12. Power dissipation vs Output Power

PD:VSP8 (4layers)

PD:VSP8 (2layers)

Maximum output power is restricted by PD.

Maximum output power is not restricted by PD.

Output Power Range

NJU7089

- 19 -

Technical Information 7. PCB layout In order to demonstrate the performance of IC, it is necessary to design a PCB appropriately. Power

line, GND line, and signal line should be drawn so that wiring resistance may become small. And please connect all the GND to the single point of Cv.

NJU7089 demo board layout pattern

Layer1(Top Layer)

NJU7089

- 20 -


Layer3(Power plane)

Layer2(Ground plane)

NJU7089

- 21 -


Layer4(Bottom Layer)

[CAUTION] The specifications on this databook are only

given for information , without any guarantee as regards either mistakes or omissions. The application circuits in this databook are described only to show representative usages of the product and not intended for the guarantee or permission of any right including the industrial rights.

NJU7089

- 22 -

■ TYPICAL CHARACTERISTICS

Supply Current vs TemperatureRL=OPEN, SD=V+

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

4.5

-50 -25 0 25 50 75 100 125 150

Temperature [˚C]

Sup

ply

Cur

rent

[mA

]

V+=5VV+=3.3V

V+=1.8V

Supply Current vs Supply VoltageRL=OPEN, SD=V+, Ta=25˚C

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

4.5

0 1 2 3 4 5 6 7

Supply Voltage [V]S

uppl

y C

urre

nt[m

A]

Ta=25˚C

Ta=-40˚C

Ta=85˚C

Ta=105˚C

Supply Current vs Temperature [STANDBY]V+=5V, RL=OPEN, SD=0.25V

1.E-10

1.E-09

1.E-08

1.E-07

1.E-06

1.E-05

1.E-04

1.E-03

-50 0 50 100 150

Temperature [˚C]

Sup

ply

Cur

rent

[A]

VSD Terminal vs Supply CurrentV+=5V, RL=OPEN, Ta=25˚C

1.E-10

1.E-09

1.E-08

1.E-07

1.E-06

1.E-05

1.E-04

1.E-03

1.E-02

1.E-01

1.E+00

0 1 2 3 4 5

VSD Terminal [V]

Sup

ply

Cur

rent

[A]

Ta=105˚C

Ta=85˚C

Ta=25˚C

Ta=-40˚C

VSD Terminal vs Supply CurrentV+=3V, RL=OPEN

1.E-121.E-111.E-101.E-091.E-081.E-071.E-061.E-051.E-041.E-031.E-021.E-01

1.E+00

0 0.5 1 1.5 2 2.5 3

VSD Terminal [V]

Sup

ply

Cur

rent

[A]

Ta=-40˚C

Ta=85˚C

Ta=25˚C

Ta=105˚C

Supply Current vs Temperature [STANDBY]V+=3V, RL=OPEN, SD=0.25V

1.E-10

1.E-09

1.E-08

1.E-07

1.E-06

1.E-05

1.E-04

1.E-03

-50 0 50 100 150

Temperature [˚C]

Sup

ply

Cur

rent

[A]

NJU7089

- 23 -


VSD Terminal vs Supply CurrentV+=1.8V, RL=OPEN

1.E-11

1.E-10

1.E-09

1.E-08

1.E-07

1.E-06

1.E-05

1.E-04

1.E-03

1.E-02

1.E-01

1.E+00

0 0.5 1 1.5 2

VSD Terminal [V]S

uppl

y C

urre

nt [A

]

Ta=-40˚C

Ta=85˚C

Ta=25˚C

Ta=105˚C

Supply Current vs Temperature [STANDBY]V+=1.8V, RL=OPEN, SD=0.25V

1.E-10

1.E-09

1.E-08

1.E-07

1.E-06

1.E-05

1.E-04

1.E-03

-50 0 50 100 150

Temperature [˚C]

Sup

ply

Cur

rent

[A]

Voltage Gain / Phase vs FrequencyV+=5V, Gv=40dB, RL=8Ω, Ta=25˚C

-60

-40

-20

0

20

40

60

1.E+02 1.E+03 1.E+04 1.E+05 1.E+06 1.E+07

Frequency [Hz]

Vol

tage

Gai

n[dB

]

-200

-150

-100

-50

0

50

100

150

200

Gain [dB]

Phase [˚]

Voltage Gain / Phase vs FrequencyV+=5V, Gv=40dB, RL=OPEN, Ta=25˚C

-60

-40

-20

0

20

40

60

1.E+02 1.E+03 1.E+04 1.E+05 1.E+06 1.E+07

Frequency [Hz]

Vol

tage

Gai

n[dB

]

-200

-150

-100

-50

0

50

100

150

200

Gain [dB]

Phase [˚]


-60

-40

-20

0

20

40

60

1.E+02 1.E+03 1.E+04 1.E+05 1.E+06 1.E+07

Frequency [Hz]

Vol

tage

Gai

n[dB

]

-200

-150

-100

-50

0

50

100

150

200

Gain [dB]

Phase [˚]


-60

-40

-20

0

20

40

60

1.E+02 1.E+03 1.E+04 1.E+05 1.E+06 1.E+07

Frequency [Hz]

Vol

tage

Gai

n[dB

]

-200

-150

-100

-50

0

50

100

150

200

Gain [dB]

Phase [˚]

NJU7089

- 24 -


Voltage Gain / Phase vs FrequencyV+=3V, Gv=40dB, RL=OPEN, Ta=25˚C

-60

-40

-20

0

20

40

60

1.E+02 1.E+03 1.E+04 1.E+05 1.E+06 1.E+07

Frequency [Hz]V

olta

ge G

ain[

dB]

-200

-150

-100

-50

0

50

100

150

200

Gain [dB]

Phase [˚]


-60

-40

-20

0

20

40

60

1.E+02 1.E+03 1.E+04 1.E+05 1.E+06 1.E+07

Frequency [Hz]

Vol

tage

Gai

n[dB

]

-200

-150

-100

-50

0

50

100

150

200

Gain [dB]

Phase [˚]

Voltage Gain / Phase vs Frequency　V+=1.8V, Gv=40dB, RL=OPEN, Ta=25˚C

-60

-40

-20

0

20

40

60

1.E+02 1.E+03 1.E+04 1.E+05 1.E+06 1.E+07

Frequency [Hz]

Vol

tage

Gai

n[dB

]

-200

-150

-100

-50

0

50

100

150

200

Gain [dB]

Phase [˚]

Voltage Gain / Phase vs FrequencyV+=1.8V, Gv=40dB, RL=8Ω, Ta=25˚C

-60

-40

-20

0

20

40

60

1.E+02 1.E+03 1.E+04 1.E+05 1.E+06 1.E+07

Frequency [Hz]

Vol

tage

Gai

n[dB

]

-200

-150

-100

-50

0

50

100

150

200

Gain [dB]

Phase [˚]

Voltage Gain / Phase vs FrequencyV+=1.8V, Gv=40dB, RL=4Ω, Ta=25˚C

-60

-40

-20

0

20

40

60

1.E+02 1.E+03 1.E+04 1.E+05 1.E+06 1.E+07

Frequency [Hz]

Vol

tage

Gai

n[dB

]

-200

-150

-100

-50

0

50

100

150

200

Gain [dB]

Phase [˚]

NJU7089

- 25 -


THD+N vs Output PowerV+=1.8V, Gv=6dB, RL=8Ω, BW:10-80kHz, Ta=25˚C

0.01

0.1

1

10

100

0.001 0.01 0.1 1

Po[W]

THD

+N[%

]

100Hz

1kHz

20kHz

THD+N vs Output PowerV+=5V, Gv=6dB, RL=8Ω, BW:10-80kHz, Ta=25˚C

0.01

0.1

1

10

100

0.001 0.01 0.1 1 10

Po[W]

THD

+N[%

]

100Hz

1kHz

20kHz

THD+N vs Output PowerV+=3.3V, Gv=6dB, RL=8Ω, BW:10-80kHz, Ta=25˚C

0.01

0.1

1

10

100

0.001 0.01 0.1 1

Po[W]

THD

+N[%

]

100Hz

1kHz

20kHz

THD+N vs Output Power V+=5V, Gv=6dB, RL=8Ω, f=1kHz, BW:10-80kHz

0.01

0.1

1

10

100

0.001 0.01 0.1 1 10

Po[W]TH

D+N

[%]

Ta=25˚C

Ta=85˚C Ta=105˚C

Ta=-40˚C

THD+N vs Output Power V+=1.8V, Gv=6dB, RL=8Ω, BW:10-80kHz

0.01

0.1

1

10

100

0.001 0.01 0.1 1

Po[W]

THD

+N[%

]

Ta=25˚C

Ta=85˚C Ta=105˚C

Ta=-40˚C

THD+N vs Output Power V+=3.3V, Gv=6dB, RL=8Ω, f=1kHz, BW:10-80kHz

0.01

0.1

1

10

100

0.001 0.01 0.1 1 10

Po[W]

THD

+N[%

]

Ta=25˚C

Ta=85˚C Ta=105˚C

Ta=-40˚C

NJU7089

- 26 -


THD+N vs Output Power[differntial]V+=5V, Gv=6dB, RL=8Ω, BW:10-80kHz, Ta=25˚C

0.01

0.1

1

10

100

0.001 0.01 0.1 1 10

Po[W]

THD

+N [%

]

100Hz

1kHz

20kHz

THD+N vs Output Power[differntial]V+=3.3V, Gv=6dB, RL=8Ω, BW:10-80kHz, Ta=25˚C

0.01

0.1

1

10

100

0.001 0.01 0.1 1 10

Po[W]TH

D+N

[%]

100Hz

1kHz

20kHz

THD+N vs Output Power[differntial]V+=1.8V, Gv=6dB, RL=8Ω, BW:10-80kHz, Ta=25˚C

0.01

0.1

1

10

100

0.001 0.01 0.1 1

Po[W]

THD

+N [%

]

100Hz

1kHz

20kHz

Output Power vs Supply VoltageRL=8Ω, THD=1%

0

0.2

0.4

0.6

0.8

1

1.2

1.4

1.6

1.8

0 1 2 3 4 5 6

Supply Voltage [V]

Out

put P

ower

[W] Ta=105, 85, 25, -40˚C

Output Power vs Supply VoltageRL=4Ω THD=1%

0

0.2

0.4

0.6

0.8

1

1.2

1.4

0 1 2 3 4 5 6

Supply Voltage [V]

Out

put P

ower

[W]

Ta=105, 85, 25, -40˚C

NJU7089

- 27 -


Power Dissipation vs Output PowerV+=5V, Gv=6dB, RL=4Ω/8Ω, BTL

0

0.2

0.4

0.6

0.8

1

1.2

1.4

0 0.5 1 1.5 2

Output Power W]

Pow

er D

issi

patio

n [W

]

RL=4Ω

RL=8Ω

Power Dissipation vs Output PowerV+=3.3V, Gv=6dB, RL=4Ω/8Ω, BTL

0

0.1

0.2

0.3

0.4

0.5

0.6

0 0.25 0.5 0.75 1

Output Power [W]P

ower

Dis

sipa

tion

[W]

RL=4Ω

RL=8Ω

Power Dissipation vs Output Power V+=1.8V, Gv=6dB, RL=4Ω/8Ω, BTL

0

0.02

0.04

0.06

0.08

0.1

0.12

0.14

0.16

0.18

0.2

0 0.05 0.1 0.15 0.2 0.25

Output Power [W]

Pow

er D

issi

patio

n [W

]

RL=4Ω

RL=8Ω

PSRR vs Frequency V+=5V, RL=8Ω, RIN=GND

0

10

20

30

40

50

60

70

1.E+01 1.E+02 1.E+03 1.E+04 1.E+05Frequency [Hz]

PS

RR

[dB

]

Ta=105, 85, 25, -40˚C

PSRR vs Frequency V+=3V, RL=8Ω, Vin=GND

0

10

20

30

40

50

60

70

1.E+01 1.E+02 1.E+03 1.E+04 1.E+05

Frequency [Hz]

PS

RR

[dB

]

Ta=105, 85, 25, -40˚C

PSRR vs Frequency V+=1.8V, RL=8Ω, Vin=GND

0

10

20

30

40

50

60

70

1.E+01 1.E+02 1.E+03 1.E+04 1.E+05

Frequency [Hz]

PS

RR

[dB

]

Ta=25, -40, 85, 105˚C

NJU7089

- 28 -


Thermal Shutdow n Supply Current vs TemperatureV+=5V, RL=OPEN

0

0.5

1

1.5

2

2.5

3

3.5

4

130 150 170 190

Temperature [˚C]S

uppl

y C

urre

nt [m

A]

Thermal Shutdow n Supply Current vs TemperatureV+=3V, RL=OPEN

0

0.5

1

1.5

2

2.5

3

3.5

4

130 150 170 190

Temperature [˚C]

Sup

ply

Cur

rent

[mA

]

Thermal Shutdow n Supply Current vs TemperatureV+=1.8V, RL=OPEN

0

0.5

1

1.5

2

2.5

3

3.5

4

130 140 150 160 170 180 190

Temperature [˚C]

Sup

ply

Cur

rent

[mA

]

Turn On Time vs Bypass Capacitor V+=5V, Vin=1Vrms, f=1kHz, RL=8Ω, Ta=25˚C

0

100

200

300

400

500

600

0 1 2 3 4 5

Cb[uF]

Turn

On

Tim

e [m

s]

Turn On Time vs Bypass Capacitor V+=3V, Vin=0.5Vrms, f=1kHz, RL=8Ω, Ta=25˚C

0

100

200

300

400

500

600

0 1 2 3 4 5

Cb[uF]

Turn

On

Tim

e [m

s]

Turn On Time vs Bypass CapacitorV+=1.8V, Vin=0.5Vrms, f=1kHz, RL=8Ω, Ta=25˚C

0

100

200

300

400

500

600

0 1 2 3 4 5

Cb[uF]

Turn

On

Tim

e [m

s]

NJU7089

- 29 -


Current Limit vs TemperatureV+=3V

-1.5

-1

-0.5

0

0.5

1

1.5

-40 0 40 80 120 160

Temperature [˚C]

Cur

rent

Lim

it [A

]

OUTAsink, OUTBsink

OUTAsource, OUTBsource

Current Limit vs Temperature V+=5V

-1.5

-1

-0.5

0

0.5

1

1.5

-40 0 40 80 120 160

Temperature [˚C]C

urre

nt L

imit

[A]

OUTAsink, OUTBsink


Current Limit vs TemperatureV+=1.8V

-1

-0.8

-0.6

-0.4

-0.2

0

0.2

0.4

0.6

0.8

1

-40 0 40 80 120 160

Temperature [˚C]

Cur

rent

Lim

it [A

]

OUTAsink, OUTBsink


Output Voltager vs Output Current　V+=5V

0

1

2

3

4

5

6

0 100 200 300 400 500 600

Output Current [mA]

Out

put V

olta

ge [V

]

Ta=-40, 25, 85, 105˚C

Ta=-40, 25, 85, 105˚C

Output Voltager vs Output CurrentV+=3V

0

1

2

3

4

0 100 200 300 400 500

Output Current [mA]

Out

put V

olta

ge [V

]

Ta=-40, 25, 85, 105˚C

Ta=-40, 25, 85, 105˚C

Output Voltager vs Output Current V+=1.8V

0

0.5

1

1.5

2

2.5

0 100 200 300

Output Current [mA]

Out

put V

olta

ge [V

]

Ta=-40, 25, 85, 105˚C

Ta=-40, 25, 85, 105˚C

NJU7089

- 30 -

[CAUTION] The specifications on this databook are only

given for information , without any guarantee as regards either mistakes or omissions. The application circuits in this databook are described only to show representative usages of the product and not intended for the guarantee or permission of any right including the industrial rights.

Documents

High-Power & Low-Voltage Audio Power Amplifier: Audio ...NJU7089 Ver1. 4 e - 1 - HIGH-POWER & LOW-VOLTAGE AUDIO POWER AMPLIFIER GENERAL DESCRIPTION The NJU7089 is an audio power amplifier