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TPS60231 Datasheet White Led Charge Pump Current Source

Manufacturer: Texas Instruments

Overview: TPS60231 www.ti.com SLVS544A – OCTOBER 2004 – REVISED FEBRUARY 2010 WHITE LED CHARGE PUMP CURRENT SOURCE WITH PWM BRIGHTNESS CONTROL Check for Samples:.

General Description

The TPS60231 charge pump is optimized for white LED supplies in color display backlight applications.

The device provides a constant current for each LED, which the initial value can be set by an external resistor.

The supply voltage ranges from 2.7 V to 6.5 V and is ideally suited for all applications powered by a single LI-Ion battery cell or three to four NiCd, NiMH, or alkaline battery cells.

Key Features

  • 1.
  • Regulated Output Current With 0.4% Matching.
  • Drives up to 3 LEDs at 25 mA Each.
  • LED Brightness Control Through PWM Control Signal.
  • High Efficiency by Fractional Conversion With 1x and 1.5x Modes.
  • 1 MHz Switching Frequency.
  • 2.7 V to 6.5 V Operating Input Voltage Range.
  • Internal Softstart Limits Inrush Current.
  • Low Input Ripple and Low EMI.
  • Overcurrent and Overtemperature Protected.
  • Undervoltage Lockout Wi.

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