NCP1337PG 查看數據表（PDF） - ON Semiconductor

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NCP1337PG

PWM Current−Mode Controller for Free Running Quasi−Resonant Operation

ON Semiconductor 

VCC

VCCON

VCCMIN

CS

Setpoint

Fault

VCSstby

CS

VCSLimit

FAULT

NCP1337

Timing Diagrams

At startup, a 4.0 ms soft−start is activated.

If the current Setpoint is above the fault

level, FAULT flag is raised.

SS

TIMER

80 ms

When FAULT is activated,

the 80 ms timer starts.

When the timer ends, if FAULT is not activated

anymore, the controller works normally.

Figure 3. Startup Sequence

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