DESCRIPTION
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).

■ HOUSEKEEPING CIRCUIT :
■ Over voltage protection for 3.3V, 5V and 12V without external components
■ Additional Over voltage protection (-5V and/ 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
■ Externally adjustable Under voltage blanking during Power Up
■ Power Good output
■ Externally adjustable PG delay
■ Remote input
■ Externally adjustable Remote delay
■ Internal Precision Voltage Reference (Vref1)
■ PWM GENERATOR :
■ Error Amplifier (easy compensation)
■ Oscillator (adjustable frequency)
■ PWM generation
■ Soft Start & Dead Time Control (adjustable)
■ Open collector outputs for indirect Pulse Transformer driving
■ Precision Voltage Reference (Vref2) (Uncommitted with Vref1)

APPLICATION
■ Primary PWM and secondary housekeeping in PC/Server SMPS using Half Bridge topology