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Details for Texas Instruments


High Efficiency White LED Driver with Programmable Ambient Light Sensing Capability
Buy Directly from Texas Instruments (3950 in Stock)
$0.5400 per unit
Series Information for LM3530UME-40/NOPB - Texas Instruments


  • feature
    1000:1 Dimming Ratio
  • feature
    40-V and 25-V Overvoltage Protection Options
  • feature
    500-kHz Fixed Frequency Operation
  • feature
    839-mA Peak Current Limit
  • feature
    90% Efficient
  • feature
    Drives up to 11 LEDs in series
  • feature
    External PWM Input for Simple Brightness Adjustment
  • feature
    I2 C Programmable Logarithmic or Linear Brightness Control
  • feature
    Internal Soft-Start Limits Inrush Current
  • feature
    Programmable Dual Ambient Light Sensor Inputs with Internal ALS Voltage Setting Resistors
  • feature
    True Shutdown Isolation for LEDs and Ambient Light Sensors
  • feature
    Wide 2.7-V to 5.5-V Input Voltage Range


The LM3530 current mode boost converter supplies the power and controls the current in up to 11 series white LEDs. The 839-mA current limit and 2.7-V to 5.5-V input voltage range make the device a versatile backlight power source ideal for operation in portable applications. The LED current is adjustable from 0 mA to 29.5 mA via an I2C-compatible interface. The 127 different current steps and 8 different maximum LED current levels give over 1000 programmable LED current levels. Additionally, PWM brightness control is possible through an external logic level input. The device also features two Ambient Light Sensor inputs. These are designed to monitor analog output ambient light sensors and provide programmable adjustment of the LED current with changes in ambient light. Each ambient light sensor input has independently programmable internal voltage setting resistors which can be made high impedance to reduce power during shutdown. The 500-kHz switching frequency allows for high converter efficiency over a wide output voltage range accommodating from 2 to 11 series LEDs. Finally, the support of Content Adjusted Backlighting maximizes battery life while maintaining display image quality. The LM3530 operates over the −40°C to 85°C temperature range.


Device Topology:
Boost (Step Up)
No. of Outputs:
Output Current:
Output Voltage:
Driver Case Style:
Input Voltage Min:
Input Voltage Max:
Switching Frequency:

Alternate Descriptions

Avnet America

LED DRVR 11Segment 3.3V/5V 12-Pin uSMD T/R

Avnet America product

Avnet Europe

LED DRVR 11Segment 3.3V/5V 12-Pin uSMD T/R

Avnet Europe product

Texas Instruments

High Efficiency White LED Driver with Programmable Ambient Light Sensing Capability

Texas Instruments product