Power Electronics

Power Converter Boosts Battery Life

The TPS61081 from Texas Instruments (TI) with a highly integrated boost converter is an output voltage of 27 V that improves battery life in portable industrial and medical applications, such as portable diagnostic systems. The converter combines a 1.3-A current switch, input-to-output isolation and a power diode. It is optimized to support single-cell Li-ion batteries, as well as a three-cell NiMH battery pack or a regulated 5-V input, such as a USB port.

Another version, the TPS61080, integrates a 0.5-A current switch to support lower output current. Both converters feature a switching frequency of 600 kHz or 1.2 MHz.

The TPS61081 adds a level of protection to the overall power system. The device can survive and protect external components from a short-circuit situation on any single pin except the input voltage pin. The integrated isolation MOSFET turns off when the inductor, power MOSFET or output is shorted to ground.

The TPS61080 and TPS61081 boost converters are available now . Both devices come in a 3-mm x 3-mm, 10-pin QFN package. Pricing in quantities of 1000 units is $1.60 for the TPS61080 and $1.75 for the TPS61081. Evaluation modules are available, and designers can further simplify design with these converters by leveraging TI’s Analog eLab Design Center, www.ti.com/analogelab.

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