Tuesday, September 3, 2013

Power converters maximise smartphone battery life

The first rf power converters to integrate the MIPI Alliance's RFFE digital control interface have been unveiled by Texas Instruments.
The LM3263 buck converter and LM3279 buck-boost converter are designed to reduce the heat and power consumption in rf power amplifiers, improving battery life and extending talk time in 2G, 3G and 4G LTE smartphones, tablets and data cards.

The 2.5A LM3263 has been optimised to meet the stringent rf requirements of multi-mode, multi-band power amplifiers with fast output voltage transients.

The device also includes active current assist and bypass to minimise inductor size without loss of output regulation. TI says this results in a 10mm2 solution, which is half the size of competing solutions.

The 1A LM3279 supports fast output voltage transients for 3G and 4G LTE. The device enables the amplifier to support high output power and high data rates, even at low battery voltages.

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