Date: 02/07/2010

Six-string White LED driver from Maxim for notebooks and netbooks

Maxim has made available the MAX17127, a six-string White LED driver that provides a complete backlighting solution for notebooks and netbooks. The step-up controller consists of a 48V MOSFET and is capable of driving up to 13 LEDs/string. The controller frequency can be programmed from 250kHz to 1MHz. This driver has a wide input-voltage range (5V to 26V). It is suggested for both netbooks that use a 2- to 3-cell Li+ battery and notebooks that use a larger battery.

The key features of the MAX17127 are:
1. The current in each string can be programmed from 10mA to 30mA using an external resistor.
2. It provides better than ±2% accurate current matching between strings therefore ensuring even LED brightness.
3. Operates in a direct-dimming mode with a dimming frequency ranging from 100Hz to 25kHz.
4. The LED current is directly controlled by the external dimming signal's frequency and duty cycle.
5. Provides a wide dimming range eliminates the audible noise.
6. It also features a low feedback voltage at each LED string.
7. It offers multiple features to protect the controller from faults such as overcurrent, overtemperature, and open-/short-string conditions.
8. The step-up controller has cycle-by-cycle current limiting and soft-start capability to control inrush current.

Package: 4mm x 4mm, 20-pin TQFN

Operating temperature range: -40°C to +85°C

Price: start at US$0.73

Availability: Now

For more information visit: www.maxim-ic.com