UC3844B, UC3845B,
UC2844B, UC2845B
High Performance Current Mode Controllers
The UC3844B, UC3845B series are high perfor...
UC3844B, UC3845B,
UC2844B, UC2845B
High Performance Current Mode Controllers
The UC3844B, UC3845B series are high performance fixed frequency current mode controllers. They are specifically designed for Off−Line and dc−dc converter applications offering the designer a cost−effective solution with minimal external components. These integrated circuits feature an oscillator, 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 under
voltage lockouts each with hysteresis, cycle−by−cycle current limiting, a latch for single pulse metering, and a flip−flop which blanks the output off every other oscillator cycle, allowing output deadtimes to be programmed from 50% to 70%.
These devices are available in an 8−pin dual−in−line and surface mount (SOIC−8) plastic package as well as the 14...