UC3825BQ

高速PWM控制器 High Speed PWM Controller

DESCRIPON

The UC3823A and UC3823B and the UC3825A and UC3825B family of PWM controllers are improved

versions of the standard UC3823 and UC3825 family. Performance enhancements have been made to several of the circuit blocks. Error amplifier gain bandwidth product is 12 MHz, while input offset voltage is 2 mV. Current limit threshold is assured to a tolerance of 5%.

FEATURES

Improved Versions of the UC3823/UC3825 PWMs

Compatible with Voltage-Mode or Current-Mode Control Methods

Practical Operation at Switching Frequencies to 1 MHz

50-ns Propagation Delay to Output

High-Current Dual Totem Pole Outputs 2-A Peak

Trimmed Oscillator Discharge Current

Low 100-μA Startup Current

Pulse-by-Pulse Current Limiting Comparator

Latched Overcurrent Comparator With Full Cycle Restart