150W LED Driver Evaluation Boards with 91% Full Load Efficiency for Street Lights


ByDinesh Kumar 0

EVL150W-HVSL LED Driver Evaluation Board

STMicroelectronics has introduced the EVL150W-HVSL, a 150W, 1A mains-input driver evaluation board with a reference design that integrates features that ensure high performance. The new evaluation board achieves a full load efficiency above 91% to maximize utility-cost saving for street lamp operators. The board is designed to analog, resistive, and PWM (Pulse Width Modulation) dimming modes, with flicker-free PWM dimming down to 1% at any frequency.

The board is designed with ST’s STCMB1 Integrated power-factor correction (PFC) controller and high-voltage resonant half-bridge controller with the LCC topology to deliver constant current despite the output voltage. Proprietary features of the device such as the constant on-time PFC control, timeshift control of the resonant half-bridge, and hard-switching prevention, save external components, and ensure superior dynamic performance and ripple rejection. The PFC and half-bridge are synchronized in burst mode to reduce light-load input consumption to less than 0.5W. The device is integrated with an 800V startup circuitry and an X-capacitor discharge and power sequencing circuitry in a compact 20-pin STCMB1, hence there is an auxiliary power supply needed.

Electromagnetic interference (EMI) is within relevant EN55022 limits and input-current total harmonic distortion (THD) less than 10% at 230V AC from 30% to 100% of full load in the EVL150W-HVSL, this meets European EN61000-3-2 Class-C and Japanese JEITA-MITI Class-C norms for lighting equipment. The device has a universal 90V-264V AC input and meets IEC 60950-1 and 62368-1 safety standards.

The EVL150W-HVSL offers various protection features such as output-overload, output short-circuit, and open-loop protection, along with the auto-restart capability to satisfy street-lighting application requirements. To know more about EVL150W-HVSL, visit the official website of STMicroelectronics.

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