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High Efficiency White LED Driver with Programmable Ambient Light Sensing Capability and I2C Compati


Package | PIN: YFQ | 16
Temp: Q (-40 to 125)
Carrier: Cut Tape
Qty Price
1-9 $1.23
10-24 $1.10
25-99 $1.02
100-249 $0.89
250-499 $0.82
500-749 $0.69
750-999 $0.57
1000+ $0.52


  • 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
  • Independent Current String Brightness Control
  • Programmable LED Current Ramp Rates
  • 40-V Overvoltage Protection
  • 1-A Typical Current Limit

Texas Instruments  LM3532TME-40A/NOPB

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.