UC3842G

DESCRIPTION

The UTC UC3842G of high performance current mode

controller is specifically designed for off-line and DC-to-DC

converter applications offering the designer a cost effective

solution with minimal external components. This integrated

circuit features approximately 40μA start up current, a precision

reference trimmed the error amplifier input. Also included are

protective  features  consisting  of  input  and  reference

undervoltage lockouts each with hysteresis, cycle-by-cycle

current limiting, and so on.

■ FEATURES

* Low startup and operating current

* User defined switching frequency(Norm is 52kHz)

* Power-saving mode for low power

* Under voltage lockout with hysteresis

* Over voltage protection

* Latching PWM for Cycle-By-Cycle current limiting

* Internally trimmed reference with undervoltage lockout

规格书UC3842G