AN8028 Просмотр технического описания (PDF) - Panasonic Corporation

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AN8028

Self-excited RCC pseudo-resonance type AC-DC switching power supply control IC

Panasonic Corporation 

AN8028

s Terminal Equivalent Circuits (continued)

Pin No.

Equivalent circuit

3

VREF

VCC

Comp.

0.7 V

3

FB

4

VREF

Comp.

5

6

VCC

4 (−)

5

6

Voltage Regulators

Description

I/O

TON:



Terminal for connecting the capacitor for deter-

mining the maximum on-period (high) of the IC

output (VOUT). An equation for approximate

calculation of the maximum on-period (TON) is

as follows:

TON = 6 500 × C

C: External capacitance

CLM:

I

Input terminal for detection of the pulse-by-

pulse overcurrent protection.

Normally, it is recommended that a filter be

attached externally.

GND:



Grounding terminal.

VOUT:

O

Output terminal for directly driving the power

MOSFET.

It uses the totem pole type output.

The maximum rating of the output current:

Peak: ±1 A

DC: ±150 mA

7

VCC:



Terminal for applying power supply voltage.

7

It monitors the supply voltage and has the opera-

tion threshold of start/stop/OVP reset.

4

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