STEVAL-LLL003V1 STMicroelectronics

STEVAL-LLL003V1 7.5 W non-isolated constant current LED driver based on VIPer0P Data brief Description The STEVALLLL003V1 evaluation board is a constant current LED driver, based on nonisolated buck topology using VIPer0P. The board delivers 130 mA 2.5% at an output load of 15 21 white LEDs. The buck topology ensures a minimum number of components as well as higher efficiency when operating at high output voltage (60 V and above). The application core is the new VIPer0P offline high voltage converter which smartly integrates an 800 V avalanche rugged power MOSFET with current-mode control. Thanks to the embedded E/A (EAGND) floating GND, the direct current regulation can be applied to the buck converter, improving the LED current accuracy. Features Non-isolated buck topology Two input voltage ranges: US range: 85-135 V (jumper J2 - AC closed, voltage doubler) EU range: 175-285 VAC (jumper J2 - open, bridge rectifier) 130 mA 2.5% output constant current (15-21 white LEDs connected) 60 kHz fixed frequency operation 89% efficiency at maximum load Protections: open/no-load circuit protection short/overload circuit protection thermal shutdown Soft start for improved system reliability Meets IEC55022 Class B conducted EMI even with reduced EMI filter, thanks to the frequency jittering feature Meets IEC61000-4-2(ESD), IEC61000-4-4 (Burst) and IEC61000-4-5 (Surge) RoHS compliant September 2017 DocID030904 Rev 1 1/4 www.st.com For further information contact your local STMicroelectronics sales office Schematic diagram STEVAL-LLL003V1 Schematic diagram Figure 1: STEVAL-LLL003V1 circuit schematic 2/4 DocID030904 Rev 1