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TPS60251 Datasheet High Efficiency Charge Pump

Manufacturer: Texas Instruments

Overview: TPS60251 www.ti.com SLVS767C – APRIL 2007 – REVISED NOVEMBER 2007 HIGH EFFICIENCY CHARGE PUMP FOR 7 WLEDs WITH I2C.

General Description

The TPS60251 is a high efficiency, constant frequency charge pump DC/DC converter that uses a dual mode 1× and 1.5× conversion to maximize efficiency over the input voltage range.

It drives up to five white LEDs for a main display and up to two white LEDs for a sub display with regulated constant current for uniform intensity.

By utilizing adaptive 1×/1.5× charge pump modes and very low-dropout current regulators, the TPS60251 achieves high efficiency over the full 1-cell lithium-battery input voltage range.

Key Features

  • 1.
  • 3.0-V to 6.0-V Input Voltage Range.
  • ×1 and ×1.5 Charge Pump.
  • Fully Programmable Current with I2C.
  • 64 Dimming Steps with 25mA Maximum (Sub and Main Display Banks).
  • 4 Dimming Steps with 80mA Maximum (DM5 for Auxiliary.

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