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LM2791LD-L датащи(PDF) 1 Page - Texas Instruments |
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LM2791LD-L датащи(HTML) 1 Page - Texas Instruments |
1 / 18 page LM2791 www.ti.com SNVS156M – FEBRUARY 2001 – REVISED MAY 2013 LM2791 Current Regulated Switched Capacitor LED Driver with Analog Brightness Control Check for Samples: LM2791 1 FEATURES DESCRIPTION The LM2791 is a CMOS charge-pump voltage 2 • Output Matching of ± 0.3% doubler and regulator that provides two regulated • Drives up to Two LEDs current sources. The LM2791 is designed to drive two • 3V to 5.8V Input Voltage white (or blue) LEDs with matched currents (within ± 0.3%) to produce balanced light sources for display • Up to 36mA Output Current backlights. They accept an input voltage range from • Soft Start Limits Inrush Current 3V to 5.8V and maintain a constant current • Analog Brightness Control determined by an external set resistor. • Separate Shutdown Input The LM2791 delivers up to 36mA of load current to • Very Small Solution Size - No Inductor accommodate two high forward voltage (typically white) LEDs. The switching frequency is 450kHz • 0.7mA Typical Operating Current (min.) to keep the conducted noise spectrum away • 1µA (max.) Shutdown Current from sensitive frequencies within portable RF • 450kHz Switching Frequency (min.) devices. • Linear Regulation Generates Predictable Noise In the LM2791, brightness is controlled by applying a Spectrum voltage between GND and 3.0V to the BRGT pin. The • WSON-10 Package: 3mm X 3mm X 0.8mm LM2791 is available in active high or low shutdown versions. The shutdown pin reduces the operating current to 1µA (max.). APPLICATIONS The LM2791 is available in a 10 pin WSON CSP • White LED Display Backlights package. • White LED Keypad Backlights • 1-Cell Li-Ion Battery-Operated Equipment Including PDAs, Hand-Held PCs, Cellular Phones • Flat Panel Displays Basic Application Circuit 1 Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. 2 All trademarks are the property of their respective owners. PRODUCTION DATA information is current as of publication date. Copyright © 2001–2013, Texas Instruments Incorporated Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. Not Recommended For New Designs |
Аналогичный номер детали - LM2791LD-L |
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Аналогичное описание - LM2791LD-L |
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