STEVAL-ISA029V1 Datasheet, PDF (1/4 Pages) STMicroelectronics – Compact power supply for DVD/set top box evaluation board with three Vout (-30 V, +3.3 V, +12 V)

STEVAL-ISA029V1
Compact power supply for DVD/set top box evaluation board
with three V_out (-30 V, +3.3 V, +12 V)
Data Brief
Features
■ Input voltage range 85 V_AC – 300 V_AC
■ V_OUT1= 12 V (±5%)
■ I_OUT1= 1 A
■ V_OUT2= 3.3 V (±2%)
■ I_OUT2= 100 mA
■ V_OUT3= -24 V (±10%)
■ I_OUT3= 40 mA
■ Safety EN60950 compliant
■ EMI - conducted EN55022-B compliant
STEVAL-ISA029V1
Description
The STEVAL-ISA029V1 evaluation 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
integrates, in the same package, an enhanced
current-mode PWM controller with 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 VIPer. 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.
December 2007
Rev 1
For further information contact your local STMicroelectronics sales office.
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