GUI for evaluation module (EVM)
LM3532
High efficiency white LED driver with programmable Ambient Light Sensing Capability and I2C Compati
Data sheet
LM3532
- Drives up to 3 Parallel High-Voltage LED Strings
at 40 V Each With up to 90% Efficiency - 0.4% Typical Current Matching Between Strings
- 256 Level Logarithmic and Linear Brightness
Control With 14-Bit Equivalent Dimming - I2C-Compatible Interface
- Direct Read Back of Ambient Light Sensor Via
8-bit ADC - Programmable Dual Ambient Light Sensor Inputs
With Internal Sensor Gain Selection - Dual External PWM Inputs for LED Brightness
Adjustment - Independent Current String Brightness Control
- Programmable LED Current Ramp Rates
- 40-V Overvoltage Protection
- 1-A Typical Current Limit
The LM3532 is a 500-kHz fixed frequency asynchronous boost converter which provides the power for 3 high-voltage, low-side current sinks. The device is programmable over an I2C-compatible interface and has independent current control for all three channels. The adaptive current regulation method allows for different LED currents in each current sink thus allowing for a wide variety of backlight and keypad applications.
The main features of the LM3532 include dual ambient light sensor inputs each with 32 internal voltage setting resistors, 8-bit logarithmic and linear brightness control, dual external PWM brightness control inputs, and up to 1000:1 dimming ratio with programmable fade in and fade out settings.
The LM3532 is available in a 16-pin, 0.4-mm pitch thin DSBGA package. The device operates over a 2.7-V to 5.5-V input voltage range and the −40°C to +85°C temperature range.
Technical documentation
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View all 7 | Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | LM3532 High-Efficiency White LED Driver With Programmable Ambient Light Sensing Capability and I2C-Compatible Interface datasheet (Rev. E) | PDF | HTML | 28 Aug 2015 |
| White paper | Common LED Functions and LED Driver Design Considerations | 21 Sep 2020 | ||
| Selection guide | Power Management Guide 2018 (Rev. R) | 25 Jun 2018 | ||
| Application note | Analog PWM Dimming in White-LED Drivers | 21 Dec 2016 | ||
| Application note | Inductor Selection in Boost Converters for LCD Backlight Applications | 24 Oct 2016 | ||
| User guide | AN-2249 LM3532 Evaluation Kit (Rev. B) | 30 Apr 2013 | ||
| User guide | AN-2249 LM3532 Evaluation Kit | 21 Jun 2012 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.
Evaluation board
LM3532EVM — LM3532 Evaluation Module
The LM3532 Evaluation Board is designed to fully evaluate the LM3532 Triple Output, White LED Driver with I2C-Compatible Interface. For a detailed description of the LM3532 refer to the LM3532 datasheet. The board comes equipped with 3 series strings of 10 white LEDs. Additionally there are two (...)
User guide: PDF
Driver or library
LM3532SW-LINUX — Linux Driver for LM3532
The Linux driver supports the LMU(Lighting Management Unit) devices for smartphone handsets. The Linux driver supports communication through the I2C bus and interfaces with various sub-systems.
Linux Mainline Status
Available in Linux Main line: No
Available through git.ti.com: (...)
Simulation tool
PSPICE-FOR-TI — PSpice® for TI design and simulation tool
PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
| Package | Pins | Download |
|---|---|---|
| DSBGA (YFQ) | 16 | View options |
Ordering & quality
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