STMicroelectronics EVL150W-HVSL LED-driver evaluation board and reference design

Click2Contact

Accelerating the creation of LED streetlamps and other medium- to high-power lighting applications, the STMicroelectronics EVL150W-HVSL LED-driver evaluation board and reference design integrates features that should ensure high performance and save bill-of-materials (BOM) costs.

As a 150 W, 1 A mains-input driver, the product achieves full-load efficiency above 91% to maximise utility-cost savings for streetlamp operators. Electromagnetic interference (EMI) is within relevant EN55022 limits and input-current total harmonic distortion (THD) less than 10% at 230 VAC from 30% to 100% of full load meets European EN61000-3-2 Class-C and Japanese JEITA-MITI Class-C norms for lighting equipment.

The EVL150W-HVSL has a universal 90–264 VAC input and meets IEC 60950-1 and 62368-1 safety standards. The board supports analog, resistive and PWM (pulse-width modulation) dimming modes, with flicker-free PWM dimming down to 1% at any frequency.

In addition, the board contains ST’s STCMB1 integrated power-factor correction (PFC) controller and high-voltage resonant half-bridge controller working with the LCC topology, which can deliver constant current independently of the output voltage and is therefore well suited to LED driving. Features such as constant on-time PFC control, timeshift control of the resonant half-bridge and hard-switching prevention are designed to save external components and ensure good dynamic performance and ripple rejection. The PFC and half bridge are synchronised when in burst mode, reducing light-load input power consumption to less than 0.5 W. The compact 20-pin STCMB1 also integrates 800 V start-up circuitry as well as X-capacitor discharge and power-sequencing circuitry. No auxiliary power supply is needed.

Luminaires powered by the EVL150W-HVSL benefit from comprehensive protection including output-overload, output short-circuit and open-loop protection, each with auto-restart capability to satisfy street-lighting application requirements.

For more information: www.st.com/evl150w-hvsl-pr.