STEVAL-ISA132V1 Datasheet, PDF (1/4 Pages) STMicroelectronics – Safe startup procedure to avoid hard switching

STEVAL-ISA132V1
300 W peak power (170 W continuous power) LLC resonant
converter based on L6699, STB13N60M2 and STPS20H100CG
Data brief
Features
 Input mains range: 190 to 264 VAC -
frequency 50 Hz
 Output voltage: 24 V 5%
 No-load consumption: < 0.6 W
 Efficiency @ 230 VAC > 92%
 EMI: within EN55022 Class-B limits
conducted pre-compliance
 Safety: meets EN60950-1
 Dimensions: 90 x 90 mm, 50 mm component
maximum height
 Safe startup procedure to avoid hard
switching
 Hard switching prevention in overload
condition and low load condition
 Burst mode in low load condition with
smooth restart to prevent audible noise
 Evaluation board can deliver more than 300
W peak power for a limited time by a thermal
protection NTC positioned near output
diodes
 Continuous power at 30 °C ambient
temperature:170 W
 The power MOSFETs and diodes are both in
D²PAK packages
 RoHS compliant
Description
The STEVAL-ISA132V1 evaluation board
implements a converter capable of delivering 170
W of continuous power (VIN = 190 VAC to 264
VAC, VOUT = 24 V) and more than 300 W peak
power for a limited time. The architecture of the
board is based on a single-stage LLC resonant
converter without PFC using the new L6699
resonant controller. The L6699 integrates some
very innovative functions such as self-adjusting
adaptive dead-time, anti-capacitive mode
protection and proprietary “safe-start” procedure
preventing hard switching at startup. High
efficiency at full load (> 92%) and no load (< 0.6
W) is obtained thanks to the STB13N60M2 (600
V, 0.35 W typ., 11 A) MDmesh M2 power
MOSFET in the half-bridge, and the
STPS20H100CG (VRRM = 100 V, IF(AV) = 2 x 10
A) Schottky diode for secondary rectification.
May 2015
DocID026808 Rev 2
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