7/28/2019 200 W, Single Output Power Supply
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DN06010/D
August 2006, Rev. 0 www.onsemi.com
Design Note DN06010/D
200 W, Single Output Power Supply
Device Application Input Voltage Output Power Topology I/O
Isolation
NCP1217 Refrigerator 90 to 270 Vac 140 W / 200 W pk
CCM(ContinuousConduction
Mode) Flyback
Yes
Circuit Description
This 14 Vout, off-line power supply was originallydesigned for
refrigeration control applications but can beuser tailored to
accommodate most 12 to 15 voltapplications requiring 140 watts
output continuous with a200 watt peak capability. The converter
circuit isdesigned around a continuous conduction mode (CCM)flyback
topology to minimize the inverters peak-to-average current ratio.
Slope compensation for D >50% isachieved with the unique
internal architecture of theNCP1217 controller and the value of
resistor R9. The 100kHz flyback transformer is designed with a
compactPQ3230 ferrite core. Voltage feedback and regulation
isimplemented with a simple TL431 programmablereference and
optocoupler.
Key Features
CCM operation for low peak to average current ratio
Output ripple reduction inductor (L3)
Dual common mode EMI filter for low conducted EM
Very low standby input current at no load (
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DN06010/D
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Schematic
C1
Notes:
1. Crossed schematic lines are not connected.2. R4 sets current
limit point; R9 sets slope compensation; R13 sets output voltage.3.
D4 sets OVP to 15V on Vcc rail (nominally 10 - 12Vdc)4. Q1 and D2
will need heatsinks; Aavid #529802B02100 or similar
5 Small heatsink or plate recommended for BD16. L1 is Coilcraft
CMT1-2.1-4L; L2 is Coilcraft F5593-A; L3 is Coilcraft
PV-0-472-20L7. TH1 is NTC thermistor for inrush limiting (Ametherm
or equivalent).8. Output caps C7, 8, 9, 10 should have low ESR with
high ripple current rating.
T
4
2
3
56
8
1
Opto
ACin
390uF400Vdc
MUR160
10nf500V
33K5W
1.0M1/2W
100pf
47uf25V
4.7
F1
R1
L1
U1
Q1
D1
D2
D3
D4
C2
C3 C4
C6
C8
R2
R3 R4
R5
R6
R7
R8
R9
+
_
1N4148A 10
U2
T1
NCP1217
(100 kHz)
1nf
C5
C7
TH1
150
4.7K,0.5W
2.4K
0.1
1K
0.1uf
C9
R10
R11
1K
TL431
2K
U3
C10
C11
C12R12
R13
C13
BD16A
600V
L2
L3
C14C15
C16
22K
R14
Gnd
0.1uf
14 V
10 A
outp
SPP20N60S5(Infineon)
MBR20100
0.15,2W
2,200uf16V x 3
2,200uf16V
1N5245B(15V)
3.3K
15K
10 ohm4A, NTC
5A 0.33uf"X2"
0.33uf"X2"
2.2nf"Y2"x 2chassis
ground
C17
10nf
SFH6156A-4or H11A817A
12
11
10
7
8
1,2,3
4,5,6
4.7uH
2
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DN06010/D
August 2006, Rev. 0 www.onsemi.com
MAGNETICS DESIGN DATA SHEET
Part Description: 100 kHz flyback transformer, 14 Vout
Project / Customer: 14 Vout, 200 Wpk power supply
Schematic ID:
Core Type: PQ3230 (Ae =1.6)Core Gap: Gap center leg
approximately 1 mm for L =300 uH
Inductance: 300 uH +/-10% (measured from pins 10 to 12)
Bobbin Type: Vertical 12 pin pcb mount
Windings (in order):
Winding #/ type Turns / Material / Gauge / Insulation Data
Hipot: 2.7 kV primary/aux to 14V secondary. Vacuum varnish.
SchematicLead Breakout / Pinout
T1
"A" Primary (12 - 11) 20 turns of 2 strands of #26HN over one
layer;Self-leads to pins; insulate for 2.7 kV to next layer.
Vcc/Aux (8 - 7) 5 turns sprial wound over the center 12.5mm
with3mm end margins. Insulate for 2.7 kV to next layer.
14 V Secondary (4,5,6 - 1,2,3) 6 turns of #17 equivalent Litz
wire (or 8 strandsof #26HN twisted) over the center 12.5mm with3mm
end margins. Insulate with tape for 2.7 kVto next winding.
"B" Primary (11 - 10) Same as "A" primary. Insulate with
tape.
Bottom (pin side) view
123
4
5
67
89
101112
12
11
10
7
8
Pri A
Pri B
Aux
456
123
14VSec
1
1
2006 ON Semiconductor.Disclaimer: ON Semiconductor is providing
this design note AS IS and does not assume any liability arising
from its use; nordoes ON Semiconductor convey any license to its or
any third partys intellectual property rights. This document is
provided only toassist customers in evaluation of the referenced
circuit implementation and the recipient assumes all liability and
risk associatedwith its use, including, but not limited to,
compliance with all regulatory standards. ON Semiconductor may
change any of itsproducts at any time, without notice.
3
Design created by Frank Cathell, E-mail:
[email protected]
