PJ494 Datasheet - Promax-Johnton

PJ494 Switchmode Pulse Width Modulation Control Circuit

The PJ494 is a fixed-frequency pulse width modulation control circuit, incorporating the primary building blocks required for the control of a switching power supply . (See Figure 1.) An internal-linear sawtooth oscillator is frequescy-programmable by two external components, RT and CT. The approxim.

PJ494 Switchmode Pulse Width Modulation Control Circuit he PJ494 incorporates on a single monolithic chip all the functions required in the construction of a pulsewidth-modulation control circuit. Designed primarily for power supply control, these devices offer the systems engineer the flexibility to tailor the power supply control circuitry to his application. The PJ494 contains an error amplifier, an on-chip adjustable oscillator, a deed-time control comparator, pulse-steering control flip-fl.

PJ494 Features

* Complete PWM Power Control Circuitry Uncommitted Outputs for 200mA Sink or Source Current Output Control Selects Single-Ended or Push

* Pull Operation Internal Circuitry Prohibits Double Pulse at Either Output Variable Dead

PJ494 Datasheet (711.58 KB)