Product overview
Description
The STEVAL-ISA029V1 demonstration board is an isolated triple-output flyback converter, suitable for wide-range input voltage operation. The converter is based on the smart power VIPer53-E which, in a single package, integrates an enhanced current-mode PWM controller and a high-voltage MDmesh power MOSFET. The switching frequency is set to 60 kHz by means of an external RC network connected to a dedicated pin on the IC. The closed loop regulation is performed on the 12 V output using an optocoupler, which drives the COMP pin of the VIPer53-E. The 3.3 V output is post-regulated using a non-integrated low drop linear voltage regulator to achieve the required accuracy. The negative 24 V output is achieved by means of a discrete linear voltage regulator, made up of a Zener diode, a resistor and a PNP transistor.
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All features
- IOUT3= 40 mA
- VOUT3= -24 V (±10%)
- EMI - conducted EN55022-B compliant
- Input voltage range: 85 VAC – 300 VAC
- IOUT1= 1 A
- VOUT1= 12 V (±5%)
- IOUT2= 100 mA
- Safety EN60950 compliant
- VOUT2= 3.3 V (±2%)