DESCRIPTION

The @vic AV3842B/3843B are specifically designed for Off-Line and dc-to-dc converter applications offering the designer a cost-effective solution with minimal external components.

The AV3842B has UVLO thresholds 16V (on) and 10V(off), ideally suited for off-line converters. The AV3843B is tailored for lower voltage applications having UVLO thresholds of 8.5V(on) and 7.6V(off).

FEATURES

* Trimmed Oscillator for Precise Frequency Control

* Oscillator Frequency Guaranteed at 250kHz

* Current Mode Operation to 500kHz

* Automatic Feed Forward Compensation

* Latching PWM for Cycle-By-Cycle Current Limiting

* Internally Trimmed Reference with Undervoltage Lockout

* High Current Totem Pole Output

* Undervoltage Lockout with Hysteresis

* Low Startup and Operating Current