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LM3697YFQR データシート(PDF) 1 Page - Texas Instruments |
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LM3697YFQR データシート(HTML) 1 Page - Texas Instruments |
1 / 43 page 70% 72% 74% 76% 78% 80% 82% 84% 86% 88% 90% 92% 2.5 3 3.5 4 4.5 5 5.5 VIN (V) Three String, L=22µH, 1MHz 3s3p 4s3p 5s3p 6s3p 7s3p C049 IN SW HVLED1 PGND HWEN SDA SCL COUT CIN L D1 PWM OVP VIN = 2.7V to 5.5V VOUT up to 40V VIN HVLED3 HVLED2 Product Folder Sample & Buy Technical Documents Tools & Software Support & Community LM3697 SNOSCS2C – NOVEMBER 2013 – REVISED OCTOBER 2015 LM3697 High-Efficiency Three-String White LED Driver 1 Features 3 Description The LM3697 11-bit LED driver provides high- 1 • Drives Three Parallel High-Voltage LED Strings performance backlight dimming for 1, 2, or 3 series for Display and Keypad Lighting LED strings while delivering up to 90% efficiency. The • High-Voltage Strings Capable of up to 40-V boost converter with integrated 1-A, 40-V MOSFET Output Voltage and up to 90% Efficiency automatically adjusts to LED forward voltage to minimize headroom voltage and effectively improve • Up to 30 mA per Current Sink LED efficiency. • 11-Bit Configurable Dimming Resolution The LM3697 is a high-efficiency three-string power • PWM Input for Content Adjustable Brightness source for backlight or keypad LEDs in smart-phone Control (CABC) handsets. The high-voltage inductive boost converter • Fully Configurable LED Grouping and Control provides the power for three-series LED strings for • Integrated 1-A/40-V MOSFET display backlight and keypad functions (HVLED1, HVLED2 and HVLED3). • Adaptive Boost Output to LED Voltages • Selectable 500-kHz and 1-MHz Switching An additional feature is a pulse width modulation Frequency (PWM) control input for content adjustable backlight control, which can be used to control any high- • Four Configurable Overvoltage Protection voltage current sink. Thresholds (16 V, 24 V, 32 V, and 40 V) The LM3697 is fully configurable via an I2C- • Overcurrent Protection compatible interface. The device operates over a • Thermal Shutdown Protection 2.7-V to 5.5-V input voltage range and a −40°C to • 29-mm2 Total Solution Size 85°C temperature range. 2 Applications Device Information(1) • Power Source for Smart Phone Illumination ORDER NUMBER PACKAGE BODY SIZE (MAX) LM3697YFQ DSBGA (12) 1.64 mm x 1.29 mm • Display, Keypad and Indicator Illumination (1) For all available packages, see the orderable addendum at the end of the data sheet. space space space Simplified Schematic Boost Efficiency 1 An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectual property matters and other important disclaimers. PRODUCTION DATA. |
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同様の説明 - LM3697YFQR |
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