NCP1200AP60 データシートの表示（PDF） - ON Semiconductor

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NCP1200AP60

PWM Current-Mode Controller for Universal Off-Line Supplies Featuring Low Standby Power

ON Semiconductor 

NCP1200A

EMI

FILTER

UNIVERSAL

INPUT

+

NCP1200A

1 Adj HV 8

2 FB

7

3 CS VCC 6

GND Drv

4

5

1N4007*

+

*Please refer to the application information section.

Figure 1. Typical Application Example

VOUT

+

PIN FUNCTION DESCRIPTION

Pin No. Pin Name

Function

1

Adj

Adjust the skipping peak current

2

FB

Sets the peak current setpoint

3

CS

Current sense input

4

GND

The IC ground

5

Drv

Driving pulses

6

VCC

7

NC

Supplies the IC

−

8

HV

Generates the VCC from the line

Pin Description

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.

By connecting an optocoupler to this pin, the peak current setpoint is

adjusted accordingly to the output power demand.

This pin senses the primary current and routes it to the internal comparator

via an L.E.B.

−

The driver’s output to an external MOSFET.

This pin is connected to an external bulk capacitor of typically 10 mF.

This unconnected pin ensures adequate creepage distance.

Connected to the high−voltage rail, this pin injects a constant current into

the VCC bulk capacitor.

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