LM3532是TI公司的一款背光产品，LM3532是High Efficiency White LED Driver with Programmable Ambient Light Sensing Capability and I2C Compati，本页介绍了LM3532的产品说明、应用、特性等，并给出了与LM3532相关的TI元器件型号供参考。
LM3532 - High Efficiency White LED Driver with Programmable Ambient Light Sensing Capability and I2C Compati - 背光 - LED驱动器 - TI公司（Texas Instruments，德州仪器）
- 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
- Power Source for White LED Backlit LCD Displays
- Programmable Keypad Backlight
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.
| PART NUMBER | PACKAGE | BODY SIZE (MAX) |
|---|---|---|
| LM3532 | DSBGA (16) | 1.87 mm x 1.77 mm |
