LED Drive Product Series
LED Drive series products from ON Semiconductor, provide charge pump and inductance these two kinds of solutions for portable applications.
The world's leading power management solutions provider ON Semiconductor company has launched three new white-light LED drivers, especially designed for use in backlight applications of mobile phones, digital cameras, MP3 players and other portable consumer electronic devices to drive high brightness LEDs. These three new devices are energy efficiency up to 90%, using 0.6 mm ultra-thin package, help designers to achieve today's battery-powered portable electronic equipment on the power supply and plate space requirements.
The NCP5010 offers up to 22 volts, which is usually powered by 2 to 5 Series white LEDs for LCD backlight applications. It's energy efficiency up to 84%, shutdown current 1 micro-ann, working input voltage range of 2.7 V to 5.5 v. It features short-circuit and overvoltage protection and provides undervoltage cut-off.
The device adopts flip chip package, occupies less than 3 mm2, height only 0.6 mm. Its small size makes it the ideal choice for the thinnest portable product. The integral pulse width modulation (PWM) boost converter has a frequency of 1 MHz (MHz) and an integrated Schottky rectifier that can be designed with small inductors and capacitor optimization plates to save more board space.
Charge Pump Solution
NCP5604A and ncp5604b Drive 3 or 4 LEDs, each LED can be up to 25 Ma respectively. Current matching tolerance is only 0.5%, to ensure that the LED brightness consistent performance is good. The energy efficiency is as high as 90%, the static current is lower than 1μa, the working input voltage range is 2.7 V to 5.5 V, and has unique short-circuit and over-voltage protection function.
Both use thin-QFN packaging (WQFN), only occupy 0.8 mm space, very suitable for the space of precious ultra-thin cell phone.