LED driver cuts external component count

The SP6887 is compatible with PWM dimming up to 1kHz and analogue dimming and can enable/dim individual LEDs through a 3bit parallel interface.

Exar's SP6887 LED driver saves valuable board space by measuring only 3x3mm QFN, while still integrating off-chip functions to lower external component requirements.

The SP6887 is a charge pump based four-channel LED driver that requires only five external components.

It is suitable for small display/keypad LED lighting applications found in handheld portable devices such as PDAs, mobile phones and data collection devices.

It is also used in architectural and general purpose LED systems found in office equipment operator panels.

"In addition to reducing board space needs, the device delivers lowered bill-of-material (BOM) costs giving OEMs a competitive advantage for supporting price-sensitive market conditions", said Joe Vyvijal, Vice President, Power Product Line.

The SP6887 is compatible with PWM dimming up to 1kHz and analogue dimming and can enable/dim individual LEDs through a 3bit parallel interface and can vary the current through an analogue control pin.

In addition, the drivers are adjustable from 1.1 to 30mA with peak efficiencies of 90% and have an input voltage operating range of 2.5 to 5.5V.

The SP6887 has 3% channel-to-channel current matching, ensuring even colour and brightness between all four LEDs.

The SP6887 operates over a -40 to +85C temperature range.

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