Advanced Analogic Technologies Inc. (AnalogicTech, Sunnyvale, CA), a developer of power management solutions, announced its new AAT3131 and the AAT3134 high-efficiency, low-noise, constant-frequency charge pumps for white LED applications. The AAT3131 and AAT3134 offer independent control for two separate banks of LEDs. Both the AAT3131 and AAT3134 help designers reduce parts count and system footprint in battery-powered portable applications.
The AAT3131 can be used to produce current levels up to 20 mA in three of its outputs, and 30 mA in a fourth output to drive LEDs from a 2.7 V to 5.5 V input. The AAT3134 supports six outputs with current outputs up to 20 mA, and allows independent control in two groups of four and two. A high 1 MHz switching frequency enables the use of small 1 µF external capacitors. The new devices also feature thermal management protection, automatic soft-start circuitry and a low-current shutdown feature. Both devices are specified to operate across the industrial (-40 °C to +85 °C) temperature range.
Both devices are available immediately. The AAT3131 comes in a 12-pin TSOPJW package. The AAT3134 comes in a 16-pin QFN package. Pricing in 1,000-unit quantities starts at $1.95 and $2.26 each for the AAT3131 and AAT3134, respectively.
