AP3988 Ver la hoja de datos (PDF) - Diodes Incorporated.
Número de pieza
componentes Descripción
Fabricante
AP3988 Datasheet PDF : 13 Pages
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Pin Descriptions
Pin Number
1
2
3
4
5, 6
7
Pin Name
CPC
FB
VCC
CS
C
GND
A Product Line of
Diodes Incorporated
AP3988/89/90
Function
This pin connects a capacitor to GND for output cable compensation
The voltage feedback from auxiliary winding
This pin receives rectified voltage from the auxiliary winding of the transformer
Current sense for primary side of transformer
This pin is connected with an internal power BJT’s collector
This pin is the signal reference ground
Functional Block Diagram
VCC
OVP
OCkP
Output Short
OTP
Max Tonp
Rcs Short
OSC
0.05V
2
FB
COMP
PFM
tOSC
tONS, NL and LL
Detector
tONS
NL
Pro
LL
3
Regulator
&
Bias
LL
UV
NL
Vload
UV
Dynamic
Response Dyn
Constant Voltage Control
VFB_ref
Cable Compensation
Vload
CV_ctrl
(LL+NL)Bar
DetectON
RQ
S
Detect
Pulse
tosc NL LL
Line
Comp.
CS
tONS
VCSN(N=1,2,3)
Peak Current Control
LEB
Frequency Dither
VCSN Select
Vload CV_M
UV
DetectON
Constant Current
Control
Shutdown
Pre_Shutdown
RQ
S
CC_ctrl
UVLO
PFM
Vally
ON
Driver
7
GND
5, 6
C
VCSN(N=1,2,3)
AP3988/89/90
Document number: DS36722 Rev. 3 - 2
CPC Vload
1
CPC
3 of 13
www.diodes.com
4
CS
March 2014
© Diodes Incorporated
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