DESCRIPTION
Based on a standard current mode PWM controller this device includes some features such as programmable soft start, IN/OUT synchronization, disable (to be used for over voltage protection and for power management), precise maximum Duty Cycle Control, 100ns leading edge blanking on current sense, pulse by pulse current limit, overcurrent protection with soft start intervention, and Standby function for oscillator frequency reduction when the converter is lightly loaded. 2 RCT + 3 DC - 14 DIS - DIS + 2.5V ISEN SS OVER CURRENT 13 + 1.2V 7 1V SYNC 1 TIMING T DC-LIM 15 VCC 8 25V + 15V/10V - Vref PWM UVLO VREF 4 9 VC BLANKING PWM FAULT SOFT-START 2R R 12 SGND SQ R VREF OK CLK DIS 6 COMP 13V 10 OUT VREF STAND-BY + 2.5V E/A - 11 PGND 16 ST-BY 5 VFB D97IN725A August 2001 1/23 L5991 - L5991A ABSOLUTE MAXIMUM RATINGS
Symbol VCC IOUT Ptot Tj Tstg Parameter Supply Voltage (ICC < 50mA) (*) Output Peak Pulse Current Analog Inputs & Outputs (6,7) Analog Inputs & Outputs (1,2,3,4,5,15,14, 1...
STMicroelectronics
