NCV3843BV

The UC3842B, UC3843B series are high performance fixed frequency current mode controllers. UC3842B, UC3843B  are specifically designed for OffLine and dctodc converter applications offering the designer a costeffective solution with minimal external components. These integrated circuits feature a trimmed oscillator for precise duty cycle control, a temperature compensated reference, high gain error amplifier, current sensing comparator, and a high current totem pole output ideally suited for driving a power MOSFET. Also included are protective features consisting of input and reference undervoltage lockouts each with hysteresis, cyclebycycle current limiting, programmable output deadtime, and a latch for single pulse metering.

These UC3842B, UC3843B  devices are available in an 8pin dualinline and surface mount (SO8) plastic package as well as the 14pin plastic surface mount (SO14). The SO14 package has separate power and ground pins for the totem pole output stage.

In the UC3842B, UC3843B  series, the UCX842B has UVLO thresholds of 16 V (on) and 10 V (off), ideally suited for offline converters. The UCX843B is tailored for lower voltage applications having UVLO thresholds of 8.5 V (on) and 7.6 V (off).