DAK-34 Power Integrations, DAK-34 Datasheet - Page 3

• Manufacturer Part Number: DAK-34
• Description: KIT DESIGN ACCELERATOR AC/DC PS
• Manufacturer: Power Integrations
• Series: TOPSwitch®-GXr

Specifications of DAK-34

• Main Purpose: AC/DC, Primary Side
• Outputs And Type: 1, Isolated
• Power - Output: 30W
• Voltage - Output: 12V
• Current - Output: 2.5A
• Voltage - Input: 85 ~ 265VAC
• Regulator Topology: Flyback
• Frequency - Switching: 132kHz
• Board Type: Bare (Unpopulated) and Fully Populated
• Utilized Ic / Part: TOP245
• Lead Free Status / RoHS Status: Not applicable / Not applicable
• Other names: 596-1004

Design Idea DI-55
TOPSwitch-GX
20 W (25 W peak) DVD Supply
NTRL
Figure 1. 20 W Multiple Output DVD Supply.
LINE
Design Highlights
• Simple, low cost, low part count solution
• No heatsink required
• Low EMI-frequency jitter allows EN55022B/FCC B
• High efficiency, >75% at 90 VAC
• Low zero load power consumption, <100 mW at
• Low standby power consumption, <1 W input at 0.5 W output,
• Excellent cross-regulation
• Differential and common mode surge immunity to 3 kV
J1-2
J1-1
Application
compliance with simple EMI filter
230 VAC
230 VAC
(EN 61000-4-5)
250 VAC
275 VAC
3.15 A
RV1
F1
DVD
0.047 µF
RT1
C3
X2
t°
1N4007 x 4
TOP245P
Device
D
S
33 µF
400 V
C1
TOPSwitch-GX
CONTROL
CM Choke
TOP245P
M
5.1 kΩ
5 mH
U1
R6
L1
10 kΩ
R4
®
C
20 W (25 W pk)
Power Output
33 µF
400 V
47 µF
C4
25 V
C13
P6KE
1N3906
VR1
130
Q3
1 kΩ
1N4007GP
R7
0.1 µF
270 Ω
C16
R3
D5
68 Ω
0.01 µF
R1
1 kV
C2
1
4
www.powerint.com
www.powerint.com
2.2 nFY1
EE25L
C8
T1
12
13
10,11
8
9
UF4003
150 µF
14
35 V
7
5
D12
Input Voltage
C9
85-265 VAC
1N4148
SB540CT
SB540CT
1200 µF
1N5819
D6
10 V
C12
D11
D10
D7
18 kΩ
1/2 W
150 µF
1 Ω
R8
35 V
R2
Operation
The TOP245P selected for the design in Figure 1 is ideal for DVD and
set-top applications. The P package removes the need for a heatsink
while still delivering 20 W/25 W peak at an ambient temperature of
50 °C.
The external current limit programming and remote ON/OFF
(inhibit) functions of the M pin allow current mode control and reduced
switching frequency at light and no-load conditions. Current mode
control is implemented by R2, Q3, R3, C16, R4 and R6.
Feedback current above ~2 mA (U1 supply current) forward biases
Q3 and pulls up R6. This adjusts the sink current out of the M pin,
C6
1200 µF
10 V
C12
BEAD
L5
470 µF
47 µF
C15
25 V
25 V
C5
U2
200 Ω
TL431
R17
U3
3.3 µH
L2
180 µF
3.3 µH
3.3 µH
25 V
LTV817A
C20
0.1 µF
L3
L4
3.3 V / 5 V / 12 V / -24 V
C14
6.34 kΩ
R12
1%
10 kΩ
Output Voltage
R10
10.0 kΩ
20.0 kΩ
470 µF
1%
R11
R9
10 V
1%
C17
1.13 kΩ
20.0 kΩ
R14
R13
1%
1%
2N3906
Q5
2.0 kΩ
R16
OPTIONAL
1%
2.4 kΩ
R15
470 µF
2N3904
10 V
C18
PI-3648-080603
Q4
2SA0885
1N4005
Q1
D9
1N4005
Topology
D8
Flyback
+12 V, 500mA
-24 V, 50 mA
J2-2, 4, 5, 7
+5 V, 2.5 A
+3.3 V, 2 A
J2-3
J2-6
RET
J2-1
3