AN4599 Datasheet, PDF (1/26 Pages) STMicroelectronics – This application note describes the features

AN4599
Application note
STEVAL-ISA132V1 24 V 300 W peak power resonant converter
by Riccardo Tosoni
Introduction
This application note describes the features of the STEVAL-ISA132V1 evaluation board at
24 V, 300 W peak power conversion.
The architecture 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 a proprietary "safe-start" procedure which
prevents hard switching at start-up.
Thanks to the chipset used, the main features of this power supply are:
– very high efficiency under high-load and low-load conditions
– safe start up procedure to avoid hard switching
– hard switching prevention under overload and low-load conditions
– burst mode under low-load conditions with smooth restart to prevent audible noise
– the demo board can deliver more than 300 W peak power for a limited time thanks to
the NTC thermal protection positioned near the output diodes.
– continuous power at 30°C ambient temperature is 170 W.
– the MOSFET and diode power devices are in D²PAK packages
Figure 1. STEVAL-ISA132V1 300 W peak power SMP evaluation board
February 2015
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