HT494ARZ

The HT494A incorporates on a single monolithic chip all the function required in the development of a pulse - width modulation control circuits. Designed primarily for power supply control, the HT494A 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 provide either common - emitter or emitterfollower output capability. Push - pull or single - ended output operation may be selected through the outputcontrol function. The architecture of the HT494A prohibits the possibility of either output being pulsed twice during push - pull operation.

Key features

• Complete PWM Power Control Circuitry
• Uncommitted Outputs for 200 mA 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 Whole Range