TSM121 Datasheet (STMicroelectronics) - SINGLE CHIP PWM & HOUSEKEEPING IC

TSM121, SINGLE CHIP PWM & HOUSEKEEPING IC

The TSM121 integrated circuit incorporates all sensing circuit to regulate and protect from over voltage, under voltage and over current a multiple output power supply (12V, 5V, 3.3V).

TSM121 incorporates all the necessary functions for proper PWM generation and pulse transformer drive to be adapted

TSM121 SINGLE CHIP PWM & HOUSEKEEPING IC FOR HALF BRIDGE SMPS s HOUSEKEEPING CIRCUIT : s Over voltage protection for 3.3V, 5V and 12V s Additional Over voltage protection (-5V and/ s s s s s s s s s s s s s s s s or -12V, or Primary Over Power control) with external components Under voltage protection for 3.3V, 5V and 12V without external components Over current protection for 3.3V, 5V and 12V with internal threshold voltage Externally adjustable Inrush Current blanking during transients Externa

TSM121 Features

* which allow safe operation in all conditions, and very high integration. TSM121 integrates two independent Voltage References which are uncommitted to ensure safe Regulation and Protection by the same chip. APPLICATION s Primary PWM and secondary housekeeping in PC/Server SMPS using Half Bridge top