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TL1451A Datasheet Dual Pwm Controller

Manufacturer: Texas Instruments

Overview: ąą TL1451A DUAL PULSEĆWIDTHĆMODULATION CONTROL CIRCUITS ą SLVS024E – FEBRUARY 1983 – REVISED NOVEMBER 1999 D Complete PWM Power Control Circuitry D Completely Synchronized Operation D Internal Undervoltage Lockout Protection D Wide Supply Voltage Range D Internal Short-Circuit Protection D Oscillator Frequency . . . 500 kHz Max D Variable Dead Time Provides Control Over Total Range D Internal Regulator Provides a Stable 2.

General Description

The TL1451A incorporates on a single monolithic chip all the functions required in the construction of two pulse-width-modulation (PWM) control circuits.

Designed primarily for power-supply control, the TL1451A contains an on-chip 2.5-V regulator, two error amplifiers, an adjustable oscillator, two dead-time comparators, undervoltage lockout circuitry, and dual common-emitter output transistor circuits.

3 2 1 20 19 1IN+ 4 18 2IN+ 1IN– 5 17 2IN– NC 6 16 NC 1FEEDBACK 7 15 2FEEDBACK IDTC 8 14 2DTC 9 10 11 12 13 1OUT GND NC V CC 2OUT The uncommitted output transistors provide common-emitter output capability for each controller.

TL1451A Distributor