Vivanco UNIVERSAL SWITCHMODE AC TO DC MAINS ADAPTERS WITH USB CHARGING FUNCTION Guía de usuario Pagina 84

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SMPS AC/DC Reference Design User’s Guide
DS70320B-page 80 © 2008 Microchip Technology Inc.
FIGURE A-6: SYNCHRONOUS RECTIFIER AND ZVT CURRENT SENSE SCHEMATIC
LIVE_GND
ZVT_CT_|BURDEN|_POS
BRIDGE_B
BRIDGE_A
LIVE_GND
+DIG
SR#1_FIRE
DRIVE_SUPPLY
NEG_OUT
LIVE_GND
12V_BUS_ERROR_F/B
D11
BAT54S_SOT23
+HV_BUS
R13
DNP
NEG_OUT
SR#2_FIRE
D8
BAS16
L1
9uH
C24
1000pF
C25
D13
BAT54S_SOT23
C20
4.7nF
SYNCH_RECT_#2_FIRE
SYNCH_RECT_#1_FIRE
12V_F/B_OPTO_CATHODE
NEG_OUT
SR#1_FIRE
12V_F/B_OPTO_ANODE
12V_OUT
12V_F/B_OPTO_ANODE
2N2 Y2
C43
SR#2_FIRE
D9
12V_F/B_OPTO_CATHODE
12V_OUT
C21
100pF
3
4
SFH617-2
Q23
R14
15R 3W AX P=20mm
7
4
BAS16
D7
L2
9uH
2
S
4
S
10
P
6
P
U2
10mm dia, 5mm pitch
L3
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