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AP3783R Datasheet(PDF) 8 Page - Diodes Incorporated

Part # AP3783R
Description  PRIMARY SIDE REGULATED SWITCHING MODE POWER SUPPLY CONTROLLER
PDF  17 Pages
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Manufacturer  DIODES [Diodes Incorporated]
Direct Link  http://www.diodes.com
Logo DIODES - Diodes Incorporated

AP3783R Datasheet(HTML) 8 Page - Diodes Incorporated

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AP3783R
Document number: DS37448 Rev. 5 - 2
8 of 17
www.diodes.com
October 2015
© Diodes Incorporated
AP3783R
Operation Principle Description
+
U2
APR3415
R3
VCC
AREF
DRAIN
DRAIN
GND
GND
VDET
DRISR
R5
C2
R2
C3
CIN2
FR1
Da
T1
FB
RFB1
DRI
CPC
RCS
RFB2
CS
CVCC
U1
GND
VCC
CCPC
RST1
RST2
Q1
5V/2A
DIN
R0
R1
C1
D1
CY1
AP3783R
CIN1
Np
Na
+
+
+
LIN
Ra
1
2
3
4
5
6
COUT
Ns
R4
C4
Figure 1. Typical Application Circuit of AP3783R
Figure 1 is the typical application circuit of AP3783R, which is a conventional Flyback converter with a 3-winding transformer---primary winding
(NP), secondary winding (NS) and auxiliary winding (NAUX). The auxiliary winding is used for providing VCC supply voltage for IC and sensing the
output voltage feedback signal to FB pin.
Figure 2. The Operation Waveform of Flyback PSR System
t
ONP
t
ONS
IPK
IPKS
VS
IP
IS
t
OFFS
t
OFF
VSEC
VA
VAUX
t
SW



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