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TPS60231 Datasheet

Part Number TPS60231
Manufacturers Texas Instruments
Logo Texas Instruments
Description White LED Charge Pump Current Source
Datasheet TPS60231 DatasheetTPS60231 Datasheet (PDF)

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

  TPS60231   TPS60231






Part Number TPS60230
Manufacturers Texas Instruments
Logo Texas Instruments
Description White LED Charge Pump Current Source
Datasheet TPS60231 DatasheetTPS60230 Datasheet (PDF)

TPS60230 www.ti.com SLVS516A – MAY 2004 – REVISED JUNE 2004 WHITE LED CHARGE PUMP CURRENT SOURCE WITH PWM BRIGHTNESS CONTROL FEATURES • Regulated Output Current With 0.4% Matching • Drives up to 5 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 .

  TPS60231   TPS60231







White LED Charge Pump Current Source

TPS60231 www.ti.com SLVS544A – OCTOBER 2004 – REVISED FEBRUARY 2010 WHITE LED CHARGE PUMP CURRENT SOURCE WITH PWM BRIGHTNESS CONTROL Check for Samples: TPS60231 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 With Hysteresis • Ultra-Small 3mm x 3mm QFN Package APPLICATIONS • White LED Backlight for Color Displays in Cellular Phones, Smart Phones, PDAs, Handheld PCs, Digital Cameras, and Camcorders • Keypad Backlight 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. Over an input voltage range from 3.1 V to 6.5 V, the device provides a high output current of up to 25 mA per LED with a total of 75 mA. High efficiency is achieved by utilizing a 1x/1.5x fractional conversion technique in combination with very low dropout current sources. In addition.


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