STEVAL-ILL084V1 Datasheet, PDF (1/4 Pages) STMicroelectronics – Digital dimming

STEVAL-ILL084V1
0.5 A, floating boost LED driver board based on the LED6000
Data brief
Features
 18 V to 36 V input voltage
 Step-up conversion (up to 15 LEDs)
 0.5 A programmed LED current
 500 kHz switching frequency
 Digital dimming
 Compliant with ceramic output capacitors
 180° out-of-phase synchronization available
 Auto recovery overcurrent and thermal
protection
 RoHS compliant
Description
The STEVAL-ILL084V1 product evaluation board
is based on the LED6000 monolithic current
source for high power LED driving. The floating
boost topology can benefit from the LED6000
wide input voltage range to drive many power
LED in series. The LED6000 is a 61 V
asynchronous switching regulator with embedded
power MOSFET, designed to supply up to 3 A
DC currents depending on the application
conditions. The 250 mV typical RSENSE voltage
drop, embedded switch-over feature on the VBIAS
pin and light load management (pulse skipping)
maximize power conversion efficiency across the
entire load range. Digital dimming is implemented
by driving the dedicated DIM pin.
The current limit threshold and the switching
frequency are adjustable for application
optimization. The device includes an internal 250
kHz oscillator that can be externally adjusted up
to 1.5 MHz. The size of the overall application is
minimized thanks to the high switching frequency
and its compatibility with ceramic output
capacitors. Two LED6000 regulators can be
synchronized in a 180° out-of-phase
configuration for reduced total input RMS current.
January 2016
DocID028902 Rev 1
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