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TDA8380A

Control circuit for switched mode power supplies

Philips Electronics 

Philips Semiconductors

Control circuit for switched mode power supplies

Product specification

TDA8380A

GENERAL DESCRIPTION

The TDA8380A is an integrated circuit intended for use as a control circuit in low-cost switched mode power supplies for

television, monitors and small industrial equipment. The TDA8380A operates using duty factor regulation in the fixed

frequency mode.

Features

• A low-current initialization circuit (maximum 150 µA) which can be switched off

• A bandgap reference generator

• Circuitry for slow-start combined with an accurate setting of the maximum duty factor (Dmax)

• Programmable low supply voltage protection with one default value

• High supply protection circuitry

• Error amplifier with a transfer characteristic generator (TCG)

• Protection against open- and short-circuited feedback loop

• An overload voltage foldback

• Primary current protection circuitry for both cycle-by-cycle and trip mode

• Protection against transformer saturation

• A direct drive output stage (sink current 2.5 A, source current 0.75 A)

• Anti-double pulse logic

• Protected against damage as a result of a short-circuited high-voltage transistor

• RC oscillator with synchronization input

QUICK REFERENCE DATA

PARAMETER

Supply voltage

Supply current

Output pulse repetition frequency range

Operating ambient temperature range

SYMBOL

VCC

ICC

fo

Tamb

MIN.

−

−

10

−25

TYP.

14

−

−

−

MAX.

−

15

100

+ 70

UNIT

V

mA

kHz

°C

PACKAGE OUTLINE

16-lead DIL; plastic (SOT38); SOT38-1 ; 1996 November 18.

November 1993

2

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