STEVAL-ILL067V1 Datasheet, PDF (1/10 Pages) STMicroelectronics – All automotive-grade components

STEVAL-ILL067V1
Six-channel ALED7707-based LED driver with embedded boost
converter for automotive interior lighting and TFT backlighting
Data brief
Features
 Wide DC input voltage (6 V - 32 V)
 Six 70 mA output channels (capable of 30
mA to 85 mA each)
 PWM brightness control (10 µs minimum
dimming on-time)
 Up to 10 white LEDs per channel (36 V OVP
threshold)
 > 90% efficiency (VIN=12 V, VBOOST=30 V,
fSW=1 MHz, no snubber)
 On-board input filter for conducted EMI
reduction
 RoHS compliant
 All automotive-grade components
Description
The purpose of this evaluation board is to provide
an application example of a six-channel, medium-
current LED driver using the ALED7707 chip. The
monolithic boost converter provides the required
LED supply voltage starting from a single supply
rail, while the brightness of the LED strings
connected to the six outputs is controlled through
a PWM signal. Open LED and LED short-circuit
fault conditions are detected and managed.
The board has been designed to provide a
compact reference solution for automotive
applications involving several LEDs arranged in
multiple strings (e.g. interior lighting, infotainment
LCD backlighting, etc.).
June 2015
DocID027964 Rev 1
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