Linear solution controls rear combination lamps

A linear regulator and controller product from ON Semiconductor is ideal for rear combination lamps, daytime running lights, fog lights, centre stop lamp arrays, turn signal lamps and LCD backlighting. The NCV7680 consists of eight linear programmable constant-current sources. It is designed for use in the regulation and control of solid-state rear combination lamps on vehicles and is capable of supporting a light-emitting diode (LED) driving current of up to 75mA per channel.

Thanks to its integrated functionality, the NCV7680 enables support for two brightness levels: one for stop and one for tail illumination. Optional pulse-width-modulation (PWM) control can also be implemented if required. System designers can set the output current (global set point) with the use of one external resistor. An optional external ballast FET allows for power distribution on designs requiring high currents. Qualified to the AEC Q100 automotive standard, the NCV7680 has a MSL 1 moisture resistance rating and an operating temperature range of -40C to +150C.

Andy Williams, senior vice-president of the Automotive Power Group at ON Semiconductor, said: 'The release of the NCV7680 takes care of powering rear combination lamps in a single chip, delivering enhanced performance and higher levels of efficiency in a smaller footprint than existing solutions on the market. 'It also allows for the better matching of LED outputs than would be possible with a discrete solution, as well as enabling fault identification,' he added. The NCV7680 is offered in a SOIC-16 lead-free package. Pricing for these devices is USD1.70 (GBP1.17) per unit in 10,000-unit quantities.

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