Data Brief
For further information contact your local STMicroelectronics sales office.
November 2008 Rev 1 1/4
4
STEVAL-ISA057V1
15 W wide range SMPS for metering based on the ESBT™
STC03DE220HV and L6565 PWM controller
Features
■Minimum input voltage: 125 VDC
■Maximum input voltage: 1250 VDC
■Output voltage: 5 V to 3.0 A
■Maximum output power: 15 W
■Short-circuit protection based on auto-restart
feature
■Minimum switching frequency limited to 30 kHz
■Safety compliant according EN60950
■Overall converter efficiency > 60%
■Not galvanic isolated solution used in most
metering applications
■PCB type and size:
– Material of PCB: FR4
– Double side layout
– Total diameter of demonstration board
58 x 120 mm
Description
This demonstration board implements a 15 W
flyback SMPS which is a very popular and much
known topology in applications switch mode
power supplies where the required output power
is in the range of 5 W to 200 W.
The converter is based on the L6565 PWM driver
working in quasi resonant mode, it means zero
voltage switching or at least switching in valley
during turn-off phases and current mode primary
control.
Excellent wide voltage input range from 125 VDC
to 1250 VDC with good efficiency.
For this application is used an ESBT™ switch:
STC03DE22HV.
The ESBT™ is a cascade configuration of a high
voltage BJT and a low voltage power MOSFET.
STMicroelectronics optimizes performance of
both devices and offers this kind of switch in one
single package to reduce application complexity,
EMI, price and increase reliability and
performance.
STEVAL-ISA057V1
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www.st.com
Circuit schematic STEVAL-ISA057V1
2/4
1 Circuit schematic
Figure 1. Schematic
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STEVAL-ISA057V1 Revision history
3/4
2 Revision history
Table 1. Document revision history
Date Revision Changes
12-Nov-2008 1 Initial release.
STEVAL-ISA057V1
4/4
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