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NCP4326 Datasheet(PDF) 5 Page - ON Semiconductor

Part No. NCP4326
Description  Secondary Controller for Multi−Output Quasi−Resonant Switchmode Power Supplies
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Maker  ONSEMI [ON Semiconductor]
Homepage  http://www.onsemi.com
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NCP4326
http://onsemi.com
5
VCC
Figure 3. Internal Circuit Architecture
+
GND
1V25
Sync
CP1
FB1
CP2
FB2
DRV1
DRV
1V25
FBm
CPm
VOLTAGE
REFERENCE
1
2
3
4
5
7
8
16
14
STBY
12
10
Ct
6
UVLO
Vcc OK
Vcc OK
+
1V25
GND
Ctramp
4V0
1V6
GND
STBY
GND
GND
GND
Flux
9
EN2
11
GND
13
EN1
2V5
+
2V5
0V 1V
+
8.5R
R
GND
Clamp
Int_Flux
GND
4V5
Offset
0V5
ICt
VDD1*
VDD1
VDD**
VDD1
VDD1
VDD
VDD
VDD
VCC
VCC
VCC
*VDD1 is not available in standby mode
**VDD is available all the time
OPAMP with
Open Collector Output
CHANNEL 1
CHANNEL 2
STBY
GND 15
GND
+
Ctramp
FBx
1V25
GND
+
GND
5V0
VDD
VDD
VDD
GND
Vcc OK
CPx
Int_Sync
STBY
DRVx
Int_Flux
ENx
GND
VDD
LOGIC
LATCH
IENx
GND
CHANNEL x
Enable or
Int_sync




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