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AP3981D2 Datasheet(PDF) 2 Page - Diodes Incorporated

Part # AP3981D2
Description  PRIMARY SIDE REGULATED POWER SWITCHER
PDF  16 Pages
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Manufacturer  DIODES [Diodes Incorporated]
Direct Link  http://www.diodes.com
Logo DIODES - Diodes Incorporated

AP3981D2 Datasheet(HTML) 2 Page - Diodes Incorporated

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AP3981D2
Typical Applications Circuit
AC
R1
C13
T 1
D3
F1
R17
C3
C12
CY1
GND
DRAIN
SOURCE
VCC
AP3981D2
U1
FB
VOUT
GND
C2
L1
5,6,7,8
4
1
R5
R6
2
R18
R2
D1
C1
DB1
B1
3
D3
R13
R16
R15
C10
R7
R9
C14
Pin Descriptions
Pin Number
Pin Name
Function
1
GND
IC ground
2
FB
Connect to the auxiliary winding through a divider network. Used as a multi-function pin to realize
output voltage sample for CV control, tons detection for CC control, line voltage sense for line
compensation, and FB-negative-protection detection.
3
VCC
IC power supply
4
SOURCE
SOURCE terminal of the integrated MOSFET
5, 6,7,8
DRAIN
DRAIN terminal of the integrated MOSFET
AP3981D2
Document number: DS41421 Rev. 2 - 2
2 of 16
www.diodes.com
May 2019
© Diodes Incorporated



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