STMicroelectronics STEVAL-LLL009V1 Digitally Controlled Power Supply

14 December, 2020

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STMicroelectronics STEVAL-LLL009V1 Digitally Controlled 300W Power Supply consists of power factor correction (PFC) and half-bridge LCC resonant converter power stages. An STM32F334R8 microcontroller implements DC-DC and output synchronous rectification digital control, while the PFC is driven in transition mode by the L6562AT controller. To ensure maximum efficiency, MDmesh K5 and MDmesh DK5 Power MOSFETs are used in the PFC and LCC half-bridge. The STripFET F7 Power MOSFET is employed to reduce conduction losses in the secondary side’s synchronous rectification stage. The primary and secondary sections are supplied by an off-line flyback circuit based on VIPER267KDTR high voltage converter for ultra-wide input, which provides regulated voltages to the control board, the gate driver ICs and the signal conditioning circuits.

The STMicroelectronics STEVAL-LLL009V1 Digitally Controlled 300W Power Supply delivers high efficiency, power factor near unity, and low THD across wide input voltage and load conditions.

Features

System architecture based on transition mode boost PFC, half bridge LCC and synchronous rectification (full bridge)
270V to 480V_AC input voltage range
Output can be configured in constant current (CC) or constant voltage (CV) mode:
- 300W maximum O/P power rating
- 48.5V ± 1% CV mode
- 6.25A ± 2.5% with voltage drop from 36 to 48V CC mode
Peak efficiency >93.5%
Power Factor > 0.9 for load > 33% of max. load of the input voltage range

THD < 20% for load > 25% of max. load of the input voltage range
Dimming control in CC mode configuration:
- 0V to 10V control
- 1% resolution
- Analog dimming
Soft start
I/P and O/P under and overvoltage protection, O/P open/no load circuit protection, O/P short/overload circuit protection
Digitally controlled by STM32F334R8
RoHS compliant
WEEE compliant (2012/19/UE RAEE II)

more information: https://www.st.com/en/evaluation-tools/steval-lll009v1.html

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Mike is the founder and editor of Electronics-Lab.com, an electronics engineering community/news and project sharing platform. He studied Electronics and Physics and enjoys everything that has moving electrons and fun. His interests lying on solar cells, microcontrollers and switchmode power supplies. Feel free to reach him for feedback, random tips or just to say hello :-)

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