TS3843B

The TS3842B and TS3843B series are high performance fixed frequency current mode controllers. This 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 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 in TS3843B are protective features consisting of input and reference undervoltage lockouts each with hysteresis, cycle-by-cycle current limiting, ogrammable output deadtime, and a latch for single pulse metering.

This device TS3843B is available in 8-pin dual-in-line plastic packages as well as the 8-pin plastic surface mount (SOP-8). The SOP-8 package has separate power and ground pins for the totem pole output stage.

The TS3843B has UVLO thresholds of 16V (on) and 10V (off), ideally suited for off-line converters.