STMicroelectronics VIPer013LS | Demoboard STEVAL-LLL004V1

Description

The STEVAL–LLL004V1 digitally controlled constant current LED driver features a PFC stage and two DC-DC converters designed to work in transition mode (TM) for optimized efficiency. The LED driver can deliver 75 W output power and can dim LEDs down to 0.5% maximum brightness level via analog and digital control, and still retain flicker operation. The STEVAL-LLL004V1 was tested for a wide input voltage rage (85 to 265 VAC) with different LED loads. The overall efficiency, power factor, and Total Harmonic Distortion (THD) of the STEVAL-LLL004V1 were calculated at different loads. Testing results show high efficiency, a power factor near unity, and low THD% under wide input voltage and load conditions due to the performance of the ST power products as well as the control strategies implemented through the 32-bit STM32F0 series microcontrolle

Features

• Wide input voltage range 85 – 265 VAC
• Transition Mode PFC
• Two constant current outputs working in transition mode based on different topologies:– Buck topology– Inverse buck topology
• Output current: 500 mA ±2.5%– Number of LEDs connected at output: 16 – 24 white LEDs (3.3 V each)
• PFC > 0.97 and THD < 20% at full load with input voltage 85-265 VAC
• Peak Efficiency at maximum load ≅ 90%
• Comprehensive safety protections: – Open/no-load circuit protection – Short-/overload circuit protection
• Soft start implementation
• LED dimming range: 0.5% to 100%– Analog dimming– Digital dimming
• Dimming control options:– Push button– 0-10 V input
• Meet IEC55022 Class B
• WEEE and RoHS compliant

Typical applications

• Digital lighting

More information

• Datasheet
• IC product information