资料介绍
UC3844_45UNISONIC TECHNOLOGIES CO., LTD UC3844/45
HIGH PERFORMANCE CURRENT MODE PWM CONTROLLERS
DESCRIPTION
LINEAR INTEGRATED CIRCUIT
The UTC UC3844/3845 are high performance fixed frequency current mode controllers that specifically designed for Off-Line and DC to DC converter applications with minimal external parts count. The differences between UC3844 and UC3845 are the maximum duty cycle ranges and under-voltage lockout thresholds. The UC3844 ideally suited to off-line applications with UVLO thresholds of 16V(ON) and 10V(OFF), and UC3845 has UVLO thresholds of 8.5V(ON) and 7.6V(OFF) for lower voltage applications.
FEATURES
*Pb-free plating product number: UC3844L/UC3845L
* Operation output switching frequency up to 500 kHz * Output deadtime adjustable from 50% to 70% * Automatic feed f