Global Sources
EE Times-Asia
Stay in touch with EE Times Asia
EE Times-Asia > Power/Alternative Energy
Power/Alternative Energy??

'Smallest' LDO drives LED lighting in portables

Posted: 04 Dec 2006 ?? ?Print Version ?Bookmark and Share

Keywords:Texas Instruments? TPS75105? LDO? regulator? LED?

Texas Instruments Inc. (TI) has introduced a two-bank, low dropout (LDO) regulator, touted to be the smallest of its kind, for support in LED lighting in portable applications such as mobile phones, navigation systems, and MP3 and media players. The device enables quality color backlighting from a tiny 1.2-by-1.2mm package, allowing the blinking and dimming of color keypads and navigation pad lights.

The TPS75105 linear, quad-LDO with matching LED constant current source drives up to four LEDs in two banks with each LED at 25mA (max). Each bank features independent PWM brightness control that controls the dimming level from "full brightness" to "off."

The TPS75105 has a regulated output current with two percent LED-to-LED matching, 28mV typical dropout voltage that extends usable supply range in Li-ion battery applications.

The TPS75105 LED driver, as well as a TPS75103 version that supports 3mA, are available today in volume production. Both come in an ultrasmall, 9-ball, 0.4mm ball-pitch wafer chip-scale package (WCSP). Suggested resale price starts at 65 cents in 1,000-unit quantities.

Article Comments - 'Smallest' LDO drives LED lighting i...
*? You can enter [0] more charecters.
*Verify code:
Related Datasheets
Part Number Description Category
? TPS75105 Low Dropout, Two-Bank LED Driver with PWM Brightness Control (Rev. E) ICs, Interface



Visit Asia Webinars to learn about the latest in technology and get practical design tips.

Back to Top