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Preliminary Information
NCV7691RCLEVB
NCV7691 8-channel Rear
Combo / Daylight Running
Light Evaluation Board User’s
Manual
Prepared by: Ondrej Kupcik
Updated by: Ladislav Bažant
ON Semiconductor
http://onsemi.com
EVAL BOARD USER’S MANUAL
Introduction
The evaluation board demonstrates rear combination / daylight running
light (RCL/DRL) solution with up to eight LED string. The board
regulates constant current of 100 mA (68 to 150 mA) through each on-
board LED string consisting of three red or two white LEDs in the wide
range of the supply voltage. The current is reduced for the board
temperature above 90°C. The board is designed in order to provide
good cooling of the active components with no extra cost. Additionally,
a heat sink may be mounted on the bottom side of the board to improve
the thermal capability of the board. In case of LEDs short or opening,
the current sources are disabled and the fault may be detected by the
ECU diagnostics.
On-board LEDs may be easily replaced by external ones.
Evaluation Board Features
• Wide range of supply voltage: 7 to 40 V
• Eight LED strings with on-board red or white LEDs (RCL/DRL)
• Nominal LED current 100 mA (150 mA max.)
• Over-temperature current fold-back protection
• OPEN jumper in each string allowing LEDs disconnection
• SHORT jumper in each string for short emulation or connection of
the external LEDs
• Led short-circuit and open-load emulation jumpers
• Optional external PWM input
• Optional Error flagging through indication LED and FLTS output
• Positions for optional EMC capacitors
• One-side components assembly
• Passive cooling (optional heat sink may be attached to the bottom)
© Semiconductor Components Industries, LLC, 2015 http://onsemi.com Publication Order Number:
May, 2015 – Rev i2.10 EVBUMXXXX
