The new TPS61165, from Texas Instruments Incorporated (TI) (NYSE: TXN), is a high-brightness LED driver with an integrated 40-V, 1.2-A switch that can drive up to three 1-W LEDs in series. The device features an input voltage range of 3-V to 18-V, which enables designers to efficiently manage multiple high-power LEDs used in single-cell, battery-powered applications or point-of-load designs with a 9-V or 12-V bus. The TPS61165 allows LED brightness to be controlled by a digital single-wire interface or pulse width modulating (PWM) signal. The digital interface can program an internal register to set the LED current to one of the 32 logarithmic steps. The converter also comes with built-in protection features, such as open LED protection, soft-start, over-current limit and over-temperature protection.
In addition to driving illumination LEDs, the TPS61165 can drive backlight LEDs for media form factor displays up to 9″ in diameter, such as those used in ultra-mobile PCs and LCD photo frames, industrial laser diodes or medical and industrial lighting.
TPS61165′s Key Features
- Wide input voltage range up to 18-V
- Integrated 40-V 1.2-A high-efficiency switching FET
- 1.2-MHz switching frequency
- 90-percent power efficiency
- 32-step single-wire digital dimming or PWM dimming
TI also announced the TPS61160 and TPS61161 converters, which support input voltages from 3-V to 18-V. Both devices integrate a 0.6-A current switch and target portable and battery powered applications with small displays, such as small 3-inch or 4-inch LCD display backlighting in portable game players, GPS systems and smart phones. The TPS61160 drives up to six LEDs with 26-V open LED protection, while the TPS61161 drives up to 10 LEDs with 38-V open LED protection. As with the TPS61165, the brightness of the LED can be controlled by a singe-wire digital interface or PWM signal, and analog dimming eliminates noise.
The TPS61165, TPS61161 and TPS61160 are available today from TI, and come in a thin 2 mm x 2 mm QFN package. Suggested resale price starts at $0.85 in 1,000-unit quantities for TPS61160, $1.00 for TPS61161 and $1.40 for TPS61165.
More info: TI TPS61165 High Brightness White LED Driver