STMicroelectronics Alarmsystem Demo-Board basierend auf L5991 and STP12NK80Z STEVAL-ISA033V1 STEVAL-ISA033V1 Data Sheet

For further information contact your local STMicroelectronics sales office.

June 2008

Rev 1

1/6

6

55 W flyback SMPS demonstration board for alarm system

based on the L5991 and STP12NK80Z

■

Input voltage: 

– Vin: 88 - 300 Vac (f: 50-60 Hz)

■

Output voltages:

– Vout1 = 13.8 V, Iout1 = 3 A

– Vout2 = 25 V, Iout2= 200 mA

– Vout3 = 3.8 V, Iout3 = 350 mA (1.9 A peak)

■

Output signals: 

– AC  input  check

– Low battery check

This demonstration board is a multi-output SMPS 
which can be used to supply an alarm system.

The circuit is composed of an AC-DC single 
output converter with an approximate power 
capability of 60 W, while the other outputs are 
obtained by means of DC-DC converters. The 
power supply also integrates a battery charger 
circuit in order to charge a standard SLA 12 V 
battery.

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