ON Semiconductor Expands LED Driver Portfolio to Offer Both Charge Pump and Inductive Solutions for Portable Applications
ON Semiconductor introduced three new white LED drivers designed to drive high brightness LEDs in backlighting applications for cellular phones, digital cameras, MP3 players, and other portable consumer electronics devices. With up to 90% efficiency and an ultra-thin 0.6 mm package profile, the devices help designers meet the stringent power and board space budgets of today's battery-powered portable electronics.
The NCP5010 supplies up to 22V typical to power a series of two to five white LEDs for LCD backlighting applications. Delivering up to 84% efficiency and 1 microamp shutdown current, the NCP5010 operates on input voltages from 2.7V to 5.5V. It features true cut-off, short-circuit and overvoltage protection, and offers undervoltage lock-out. This space-saving device is offered in a flip-chip package – which utilizes less than 3 square mm of board space and requires only 0.6 mm of profile room. Its compact size makes it well-suited for use in the thinnest of portable products. The 1 megahertz (MHz) frequency of the device's integral pulse width modulation (PWM) boost converter and the integration of a Schottky rectifier enables board designs to be optimized for small inductors and capacitors – saving additional board space.
The NCP5604A and NCP5604B drive either 3 LEDs or 4 LEDs, respectively, at up to 25 milliamps (mA) of current per LED. Current matching tolerances of 0.5 percent ensure excellent uniform LED brightness. Delivering up to 90% efficiency and less than 1 microamp quiescent current, these devices operate on input voltages from 2.7V to 5.5V and feature unique short-circuit and overvoltage protection. Both the NCP5604A and NCP5604B are offered in a thin profile QFN package (WQFN) that requires only 0.8 mm of profile room – making it well-suited for ultra-slim phone form factor where space is at a premium.
The NCP5010 is offered in a Pb-free, 8-pin, 1.7 mm x 1.7 mm x 0.6 mm flip-chip package. It is priced at $0.67 per unit in 3,000-unit quantities. The NCP5604A is offered in a Pb-free WQFN-16 package and priced at $0.69 per unit in 3,000-unit quantities. The NCP5604B is offered in a Pb-free WQFN-16 package and priced at $0.66 per unit in 3,000-unit quantities.
