Automotive LED drivers & controllers for advanced vehicle lighting applications from ON Semi

04 February 2020

On Semiconductor-automotive-LED-drivers-controllers-NCV7685_580x280

New family of devices from On Semiconductor simplifies task of designing efficient & reliable lighting solutions with sophisticated functionality to enhance road safety.

ON Semiconductor has launched a new family of four devices that facilitate the high levels of performance and innovative functionality that vehicle manufacturers and consumers now expect from automotive exterior and interior lighting. Aimed specifically at low power solid state lighting, the new family comprises two LED drivers (NCV7683 and NCV7685) and two current controllers (NCV7691 and NCV7692).

In the pursuit of improved road safety, automakers are moving away from simple ‘on/off’ operation to sophisticated systems that incorporate movement and variable intensity within rear combination lamps (RCLs), turn signals, fog lamps, and other externally modulated LED clusters to give clearer and highly visible warnings to other road users.

The NCV7685 and NCV7683 integrate 12 and 8 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.

With the performance and functionality now possible with LED lighting, and demanded by automakers and consumers alike, sophisticated lighting drivers and controllers are fundamental to help turn ideas into reality,” said Jim Alvernaz, Automotive Products Division at ON Semiconductor. “In addition to important safety gains, LED-based automotive lighting creates exciting opportunities for vehicle engineers to reinforce branding and identity.


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