TI's 800-mA power management IC provides brighter flash
Texas Instruments Incorporated (TI) announced today a high-power, white LED power conversion chip for next-generation camera phones and PDAs.
The IC will enable brighter flashes and ultimately, better quality pictures.
TI's TPS61059 single-cell white LED driver is optimized to safely and efficiently support up to 800 mA over the input voltage range of a single-cell Lithium-Ion battery.
Based on a fixed frequency of 650 kHz pulse width modulation (PWM) controller, the device can achieve an 80 percent maximum efficiency.
To further maximize battery life, the TPS61059 can be disabled and placed in a shutdown mode where the power is disconnected to the LED and current consumption reduced to less than 1 uA.
Built-in pre-charge and soft- start circuitry prevents excessive current to build during start-up.
Additionally, the LED is safely protected by the TPS61059's open and short- circuit as well as over-temperature protection features.
TI also introduced the TPS65552A, a new photo-flash capacitor charger with integrated IGBT driver for Xenon lamp applications in digital still cameras, as well as the TPS65520, an integrated 13-channel power management IC that meets all power requirements for today's digital still cameras while minimizing the number of required external components.
Pricing and Availability
All three power ICs are available in volume production from TI and its authorized distributors. The TPS61059 comes in a tiny 10-pin, 3mm x 3mm QFN package, and is priced at $0.95 each in quantities of 1,000 units.
Texas Instruments Incorporated Semiconductor Group, SC-05219 Literature Response Center 14950 FAA Blvd. Fort Worth, TX 76155 1-800-477-8924