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NCP1030_06 Datasheet(PDF) 3 Page - ON Semiconductor

Part No. NCP1030_06
Description  Low Power PWM Controller with On−Chip Power Switch and Startup Circuits for 48V Telecom Systems
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Maker  ONSEMI [ON Semiconductor]
Homepage  http://www.onsemi.com
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 3 page
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NCP1030, NCP1031
http://onsemi.com
3
Figure 2. Pulse Width Modulation Timing Diagram
CT Ramp
CT Charge
Signal
PWM
Comparator
Output
PWM Latch
Output
Power Switch
Circuit Gate Drive
Leading Edge
Blanking Output
COMP Voltage
Current Limit
Propagation Delay
Current Limit
Threshold
Normal PWM Operating Range
Output Overload
Figure 3. Auxiliary Winding Operation with Output Overload Timing Diagram
VCC(on)
VCC(off)
VCC(reset)
0 V
0 mA
ISTART
0 V
0 V
VDRAIN
VFB
Normal Operation
Power−up &
standby Operation
Output Overload
2.5 V
VUV
0 V
3.0 V




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