ST STEVAL-LLL012V1

The STEVAL-LLL012V1 smart LED driver reference design consists of a power board and a connectivity board. The power board is a single-stage LED driver with high power factor (HPF) and low total harmonic distortion (THD), designed for LED power supply specifications in smart home lighting applications. The primary side is managed by an HVLED001B controller driving an AC-DC HPF flyback converter; the IC independently implements primary-side regulation and optocoupler control, enabling precise regulation and ultra-low standby power consumption at no load. The converter delivers a maximum output power of 35W, with an LED voltage range of 24–48V and constant current regulation at 0.7A. The power board supplies the connectivity board with 3.3V power (J12 pin 1) and common ground (J12 pin 4) via J12. The connectivity board integrates a programmable BlueNRG-M2SP, which manages the enable/disable state (J12 pin 3) and PWM dimming signal (J12 pin 2).

• 35W LED driver with high power factor (HPF) flyback and constant current (CC) secondary regulation
• BLE module wireless connectivity support
• BLE Mesh mobile app support
• Remote on/off and PWM dimming commands (10-100%)
• LED current: 0.7A
• LED voltage range: 24-48V
• THD < 15%
• PF > 0.95 at full load over wide input range
• Efficiency > 90%
• Standby power < 0.3W

• Smart home lighting applications