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LM3532 Datasheet(PDF) 1 Page - Texas Instruments |
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LM3532 Datasheet(HTML) 1 Page - Texas Instruments |
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1 / 52 page  VOUT up to 40V VIN IN SW OVP ILED1 ILED2 ILED3 PGND ALS2 ALS1 INT Ambient Light Sensor 1 Ambient Light Sensor 2 VALS VIN HWEN SDA SCL LM3532 COUT CIN L D1 PWM1 PWM2 T0 Product Folder Sample & Buy Technical Documents Tools & Software Support & Community LM3532 SNVS653E – JULY 2011 – REVISED AUGUST 2015 LM3532 High-Efficiency White LED Driver With Programmable Ambient Light Sensing Capability and I2C-Compatible Interface 1 Features 3 Description The LM3532 is a 500-kHz fixed frequency 1 • Drives up to 3 Parallel High-Voltage LED Strings asynchronous boost converter which provides the at 40 V Each With up to 90% Efficiency power for 3 high-voltage, low-side current sinks. The • 0.4% Typical Current Matching Between Strings device is programmable over an I2C-compatible • 256 Level Logarithmic and Linear Brightness interface and has independent current control for all three channels. The adaptive current regulation Control With 14-Bit Equivalent Dimming method allows for different LED currents in each • I2C-Compatible Interface current sink thus allowing for a wide variety of • Direct Read Back of Ambient Light Sensor Via backlight and keypad applications. 8-bit ADC The main features of the LM3532 include dual • Programmable Dual Ambient Light Sensor Inputs ambient light sensor inputs each with 32 internal With Internal Sensor Gain Selection voltage setting resistors, 8-bit logarithmic and linear • Dual External PWM Inputs for LED Brightness brightness control, dual external PWM brightness control inputs, and up to 1000:1 dimming ratio with Adjustment programmable fade in and fade out settings. • Independent Current String Brightness Control The LM3532 is available in a 16-pin, 0.4-mm pitch • Programmable LED Current Ramp Rates thin DSBGA package. The device operates over a • 40-V Overvoltage Protection 2.7-V to 5.5-V input voltage range and the −40°C to • 1-A Typical Current Limit +85°C temperature range. 2 Applications Device Information(1) PART NUMBER PACKAGE BODY SIZE (MAX) • Power Source for White LED Backlit LCD Displays LM3532 DSBGA (16) 1.87 mm x 1.77 mm • Programmable Keypad Backlight (1) For all available packages, see the orderable addendum at the end of the data sheet. Typical Application Circuit 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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