ncp1001 ON Semiconductor, ncp1001 Datasheet - Page 13

• Manufacturer Part Number: ncp1001
• Description: Integrated Off-line Switching Regulator
• Manufacturer: ON Semiconductor

Power Switch
Circuit Voltage
(Pin 5)
V
CC
(Pin 1)
Limiter
Start−Up Circuit
Hysteretic Regulation
Switching Disabled
Start−up
I
On
start
Switching
I
CC1
Off
Figure 20. Auto Restart Operation Timing Diagram
1
On
I
start
NCP1000, NCP1001, NCP1002
Switching Disabled
2
I
Eight Cycles
Off
CC2
7
I
On
start
Auto Restart Operation with Overloaded or Shorted Output
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8
I
Off
CC2
Power Switch Circuit Duty Cycle During Auto Restart
I
start
13
On
Switching
I
CC1
5%
Off
1
2
During Auto Restart
Switching Disabled
Start−Up MOSFET
7
Duty Cycle
35%
95%
8
65%
Switching
1
8.6 V
7.5 V
0 V
Flyback Voltage
Rectified Line Voltage
0 V