描述 Description

The GL494 incorporates on a single monolithic chip all the functions required in the construction of a pulse-width-modulation control circuit. Designed primarily for power supply control, the GL494 contains an on-chip 5-volt regulator, two error amplifiers, adjustable oscillator, dead-time control comparator, pulse-steering flip-flop, and output-control circuitry. The uncommitted output transistors pro-vide either common-emitter or emitter-follower output capability. Push-pull or single-ended output operation may be selected through the output control function. The ar-chitecture of the GL494 prohibits the possibility of either output being pulsed twice during push-pull operation.

特性 Features

● Complete PWM Power Control Circuitry

● Uncommitted Outputs for 200mA Sink or Source

● Output Control Selects Single-Ended or Push-Pull Operation

● Internal Circuitry Prohibits Double Pulse at Either Output

● Internal Regulator Provides a Stable 5V Reference Supply

● Variable Dead-Time Provides Control Over Total Range