3 A LED driver based on the LED5000 in BB- topology
Features
• 5.5 V to 48 V operating input voltage range
• 850 kHz fixed switching frequency
• 200 mV typ. current sense voltage drop
• BB- boost topology
• PWM dimming
• ±3% output current accuracy over
temperature
• 200 mOhm typical R
DSON
• Peak current mode architecture
• Short-circuit protection
• Compliant with ceramic output capacitors
• Inhibit for zero current consumption
• Thermal shutdown
• RoHS compliant
Description
The STEVAL-ILL064V1 is a product evaluation
board based on the LED5000, an 850 kHz fixed
switching frequency monolithic step-down DC-DC
converter designed to operate as a precise
constant current source with an adjustable
current capability up to 3 A DC.
The embedded PWM dimming circuitry features
LED brightness control. The regulated output
current level is set by connecting a sensing
resistor to the feedback pin. The 200 mV typical
R
SENSE
voltage drop enhances performance in
terms of efficiency.
The size of the overall application is minimized
thanks to the high switching frequency and its
compatibility with ceramic output capacitors. The
device is fully protected against overheating,
overcurrent and output short-circuit.
August 2014 DocID026228 Rev 1 1/4
For further information contact your local STMicroelectronics sales
office
www.st.com
