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Saturday, March 13, 2010

Versatile Boost Converter with TPS6108x

This is design circuit for converter. There are two types of highly integrated boost converters, the TPS61081 and TPS61080. Both of them require low input voltage of 2.5V and the output is adjustable up to 27 V. The TPS61080’s current limit rating of the integrated power switches is 0.5 A and 1.3 A for TPS61081. This is the figure of the circuit;


It is useful for industrial application such as a 12- or 24-V industrial power rail from a 3.3- or 5-V bus. It also can be used to boost the 3.6-V Li-ion battery voltage used in most portable applications. Besides that, it can be used for higher voltages required applications such as OLED displays, powering thin film-transistor (TFT) LCDs, camera flashlights or WLED backlights.

For light-load efficiency, we can configure the switching frequency about 600kHz and 1.2 MHz for smaller external components . An extremely small boost converter is enabled by the 3 × 3-mm QFN package for a wide variety of applications because it has, fast PWM switching and internal power switches, and integrated feedback compensation. [Source: Texas Instruments Application Note]

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