NCP1216A 데이터 시트보기 (PDF) - ON Semiconductor

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NCP1216A

PWM Current-Mode Controller for High-Power Universal Off-Line Supplies

ON Semiconductor 

NCP1216, NCP1216A

+

*See Application Section

EMI

Filter

Universal Input

NCP1216

1 Adj Fosc = 35kHz HV 8

+

2 FB

7

3 CS Vcc 6

4 GNDDrv 5

Rcomp

+

Rsense

Figure 1. Typical Application Example

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1

Adj

Adjust the Skipping Peak Current This pin lets you adjust the level at which the cycle skipping process

takes place. Shorting this pin to ground, permanently disables the skip

cycle feature.

2

FB

Sets the Peak Current Setpoint By connecting an Optocoupler to this pin, the peak current setpoint is

adjusted accordingly to the output power demand.

3

CS

Current Sense Input

This pin senses the primary current and routes it to the internal com-

parator via an L.E.B. By inserting a resistor in series with the pin, you

control the amount of ramp compensation you need.

4

GND

IC Ground

−

5

Drv

Driving Pulses

The driver’s output to an external MOSFET.

6

VCC

7

NC

Supplies the IC

−

This pin is connected to an external bulk capacitor of typically 22 mF.

This un−connected pin ensures adequate creepage distance.

8

HV

Generates the VCC from the Line Connected to the high−voltage rail, this pin injects a constant current

into the VCC bulk capacitor.

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