Backlight power chip at the double

Edited by the Electronicstalk editorial team Apr 23, 2007

White LED driver features inductive boost convertor powering two independent drivers for driving main panel backlight and OLED subdisplay or additional white LEDs.

The SP6415 is the latest addition to the family of white LED drivers for the portable market from Sipex Corp.

The device features an inductive boost convertor powering two independent drivers for driving the white LED main panel backlighting and powering the OLED subdisplay or additional white LEDs.

The device is offered in a space saving DFN-10 package.

Ideally suited for dual display architectures such as clamshell phones, the SP6415 can easily be configured to automatically turn off the subdisplay when the phone is open.

Each driver output current is programmed by a single external resistor.

PWM dimming is possible via the enable pin which also is used to put the device into a 1uA showdown which greatly extends battery life.

With an output voltage up to 20V, as many as five LEDs in series can be powered at over 80% efficiency when the SP6415 is powered from a single cell lithium Li-ion battery or internal 3.3 or 5V rails found in most handheld equipment.

When switching from powering the main display to the subdisplay, voltage is adjusted to maximise efficiency and minimise power loss.

Additionally, the device offers a full protection scheme against fault conditions such as: overvoltage, overcurrent, overtemperature and undervoltage lockup.

The SP6415 is offered in a small lead-free DFN-10 RoHS compliant package meeting the extended temperature range -40 to +85C.

The device is priced at US $1.40 each in quantities of 1000 units.