This document describes a 55W flyback SMPS demonstration board for an alarm system based on the L5991 and STP12NK80Z. The board features multiple output voltages and signals to meet the power requirements of the alarm system.
The STEVAL-ISA033V1 is a multi-output SMPS demonstration board designed to supply an alarm system. It features an AC-DC single output converter with an approximate power capability of 60 W, while other outputs are obtained via DC-DC converters. The board also integrates a battery charger circuit for a standard SLA 12 V battery.
| Input voltage | 88 - 300 Vac (f: 50-60 Hz) |
|---|---|
| Output voltage 1 | 13.8 V |
| Output current 1 | 3A |
| Output voltage 2 | 25 V |
| Output current 2 | 200 mA |
| Output voltage 3 | 3.8 V |
| Output current 3 | 350 mA (1.9 A peak) |
| Power capability | approximate 60 W |
The board accepts an input voltage between 88 and 300 Vac at a frequency of 50-60 Hz.
The 13.8 V output can supply a maximum current of 3 A.
The power supply integrates a circuit to charge a standard SLA 12 V battery.