TL1453C DUAL PULSE-WIDTH-MODULATION CONTROL CIRCUIT

SLVS039A - FEBRUARY 1990 - REVISED DECEMBER 1990

features

• Complete PWM Power Control Circuitry
• Completely Synchronized Operation
• Internal Undervoltage Lockout Protection
• Wide Supply Voltage Range
• Oscillator Frequency...500 kHz Max
• Variable Dead Time Provides Control Over Total Range
• Internal Regulator Provides a Stable 2.5-V Reference Supply

description

The TL1453C incorporates the functions required in the construction of two pulse-width-modulation control circuits on a single monolithic chip. Designed primarily for power supply control, the TL1453C 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.

The uncommitted output transistors provide common-emitter output capability for each controller. The internal amplifiers exhibit a common-mode voltage range from 1.05 V to 1.45 V. The dead-time control comparator has no offset unless externally altered and may be used to provide 0% to 100% dead time. The on-chip oscillator may be operated by terminating R_T (pin 2) and C_T (pin 1). During low-V_CC conditions, the undervoltage lockout control circuit feature inhibits the output until the internal circuitry is operational.

The TL1453C is characterized for operation from -20°C to 85°C.

View more information about generic part numbers:TL1453

Go to the Engineering Design Center to locate information on other TI Semiconductor devices.

(c) Copyright 1998 Texas Instruments Incorporated. All rights reserved.
Trademarks, Important Notice!