The NCV7685 and NCV7683 integrate twelve and eight linear programmable current sources, respectively, enabling multiple strings of LEDs to be driven with up to 100 mA per channel. The devices provide an array of configurability options, including daisy-chaining, illumination level control, current regulation, sequencing functionality, and channel combination. The NCV7685 incorporates an 8-bit I2C interface with CRC8 error detection for individual output current adjustment via pulse width modulation (PWM), and for advanced diagnostics – including detection of an open LED string or under voltage condition – a dedicated diagnostic pin is also available. The NCV7685 may be powered with a DC-DC controller and/or LDO voltage regulator, depending upon specific design requirements.
The NCV7691 provides a regulated wide current range for driving LEDs in one or multiple strings, with only an external NPN bipolar transistor and a feedback resistor. The driver provides design flexibility to add additional single channels to multichannel systems, and supports a dimming function via its PWM input. The NCV7691 includes open string, short circuit, and thermal shutdown, ensuring safe and reliable operation of essential lighting. The derivative NCV7692 offers a faster response time and a reduced threshold for open load detection.
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