DI-30 Ver la hoja de datos (PDF) - Power Integrations, Inc
Número de pieza
componentes Descripción
Fabricante
DI-30 Datasheet PDF : 2 Pages
| |||
Design Idea DI-30
®
TOPSwitch®-GX
180 W PC Main SFX Supply
Application Device Power Output
Input Voltage
Output Voltage
Topology
PC Main TOP249Y
180 W
90-130 VAC / 180-265 VAC 3.3 V / 5 V / 12 V / -12 V Forward
Design Highlights
• 180 W cont. (200 W peak) in PC SFX form factor
• Includes passive power factor correction (PFC)
• TOPSwitch-GX integrated features enable extremely low
component count
• Meets 1 W standby spec (0.91 W input, 0.5 W output)
• High efficiency (71% minimum)
• Integrated line undervoltage and overvoltage detection
• Low EMI due to frequency jitter
• SOURCE referenced TO-220 tab lowers conducted EMI
• Maximum duty cycle reduction (DCMAX) prevents transformer
saturation for fault and transient loads
• Uses conventional magamp for 3.3 V output
• Meets CISPR22B/EN55022B conducted EMI
Operation
TOPSwitch-GX integrates many features designed for use with
forward converters. Passive power factor correction (PFC) is
implemented using inductors LPFC1 and LPFC2. Transistors
Q4, Q6, R1, R2, R3, R5, and R6 form an active capacitor (C2,
BR1
KBL06
CY3
2.2 nF
(Safety)
LPFC1
JP9
CY4
2.2 nF
(Safety)
CX1
0.047 µF
250 VAC
L7
8.2 mH
CX2
0.33 µF
250V
RT1
10 Ω
R10
560 K
1/2 W
RV1
275 V, 14 mm
C2
470 µF
200 V
R1
330 kΩ
C4
2.2 nF
1 kV
Q4
MPSA42
D1
1N5407
R3
2.2 MΩ
R5
180 kΩ
R6
2.2 MΩ
R4
2.2 MΩ
LPFC2
To AC Selector
Switch
Q6
MPSA92
TOPSwitch-GX
U1
TOP249
R8
130 kΩ
1%
R36
43.2 kΩ
1%
C3
470 µF
200 V
VR3
BZY97C-
200
VR4
BZY97C-
180
VR5
R2 BZY97C-
330 kΩ 180
D
L
C22
100 pF
CONTROL
50 V
C
S
XF
R30
3.3 kΩ
C8
0.033 µF
50 V
R9
47 Ω
C6
47 µF
16 V
F1
4A
L
G
N
C7
100 nF
50 V
R12
12 kΩ
R38
5.1 kΩ
R106
27 kΩ
Q7
2N3904
U3
LTV817
C23
33 nF
50 V
R37
10 kΩ
C3) balancing circuit, operating only as needed to minimize
zero-load power consumption.
Resistors R3, R5 and R6 implement start-up undervoltage
lockout, which prevents the supply from starting below
180 VDC. Components R4, R14, Q1 and R30 implement an
independent undervoltage using the X pin, which allows the
supply to continue delivering power all the way down to
140 VDC (increasing holdup time). Resistor R7 provides
additional hysteresis.
The primary side components D1, VR3-5 and C4, along with
secondary side C9 and R30, implement the Zener/capacitor
reset/clamp circuit. This circuit provides reset voltage for the
transformer and clamps the DRAIN pin voltage to a safe level
(<~600 V) under all conditions.
The reset circuit works in conjunction with the DCMAX
reduction circuit (R8, R36, C22, VR19 and D18) to limit the
maximum duty cycle and prevent transformer saturation
under fault and transient conditions.
C10
1 nF
50 V
Coupled
choke
L1
5 13 µH 4
2
14
D7
7, 8
1, 2
MBR3045
C9
47 nF
13
50 V
63
C11
1000 µF
16 V L2
0.5 µH
R30
1Ω
1
1W
8, 9, 10
C20
330 pF
50 V
11,12
D8
MBR6045
3 R13
10 Ω
D6
BAV20
D18
4
BAV20
R7
560 kΩ
VR19
1N5229
R11
300 Ω
Q1
2N3908
R14
75 kΩ
D105
1N4148
C5
1 µF
100 V
C12
2200 µF
6.3 V
C27
330 pF
50 V
R11
330 Ω
D20
UF4002
U2
SFH615A-2
U5
TL431
R21
270 Ω
C24
330 µF
25 V
R18
4.74 kΩ
1%
R15
1.8 kΩ
C17
100 nF
50 V
R16
1 kΩ
C16
100 nF R17
50 V 15 kΩ
R19
4.12 kΩ
1%
+12 V
+5 V
C13
220 µF
63 V
TO
MAGAMP OUT
(3.3 V)
RTN
C25
1 µF
50 V
LM
320
- 12 V
R20
270 kΩ
+12 V STBY
PI-3384-120902
Remote
ON/OFF
Figure 1. 180 W (200 W pk.) PC Main Power Supply Schematic (Note: Schematic does not include transformer Y-capacitor).
DI-30
www.powerint.com
December 2002
Share Link: 