NCP1031 ON, NCP1031 Datasheet - Page 3

• Manufacturer Part Number: NCP1031
• Description: Low Power PWM Controller with On-Chip Power Switch and Startup Circuits for 48V Telecom Systems
• Manufacturer: ON

Circuit Gate Drive
Blanking Output
Leading Edge
Power Switch
Comparator
PWM Latch
C
C
T
T
Charge
Output
Output
Signal
Ramp
PWM
V
CC(reset)
V
V
V
I
CC(on)
CC(off)
START
DRAIN
0 mA
3.0 V
2.5 V
V
V
0 V
0 V
0 V
0 V
UV
FB
Figure 3. Auxiliary Winding Operation with Output Overload Timing Diagram
standby Operation
Power−up &
Figure 2. Pulse Width Modulation Timing Diagram
Normal PWM Operating Range
Normal Operation
NCP1030, NCP1031
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3
Output Overload
Output Overload
Current Limit
Propagation Delay
COMP Voltage
Current Limit
Threshold