Description

The UC2843BD1 is a high-performance current mode PWM Controller IC. It provides the necessary features to implement offline or DC-to-DC fixed frequency current mode control schemes with a minimal external parts count. Internally implemented circuits include a trimmed oscillator for precise duty cycle control under-voltage lockout featuring a start-up current less than 0.5mA, a precision reference trimmed for accuracy at the error amp input, logic to ensure latched operation, a PWM comparator that also provides current limit control and a totem pole output stage designed to source or sink high peak current. The output stage, suitable for driving N-channel MOSFETs is low in the off-state.

Features:

Trimmed oscillator for precise frequency control
Automatic feed-forward compensation
Latching PWM for cycle-by-cycle current limiting
Internally trimmed reference with under-voltage lockout
High current totem pole output
Under-voltage lockout with hysteresis
Low start-up and operating current

Package Includes:
1 x UC2843BD1 STMICROELECTRONICS Current Mode PWM, 30V supply, 500 kHz, 5V/1A out, SOIC-8