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Details for LM3530UME-40/NOPB by Texas Instruments
Electronic & Electrical Components > Semiconductors - ICs > Driver & Interface ICs
LED DRIVER 12 MicroSMD
LM3530UME-40/NOPB image

LM3530UME-40/NOPB by Texas Instruments

LED DRIVER 12 MicroSMD
Features
1000:1 Dimming Ratio
40-V and 25-V Overvoltage Protection Options
500-kHz Fixed Frequency Operation
839-mA Peak Current Limit
90% Efficient
Drives up to 11 LEDs in series
External PWM Input for Simple Brightness Adjustment
I2 C Programmable Logarithmic or Linear Brightness Control
Internal Soft-Start Limits Inrush Current
Programmable Dual Ambient Light Sensor Inputs with Internal ALS Voltage Setting Resistors
True Shutdown Isolation for LEDs and Ambient Light Sensors
Wide 2.7-V to 5.5-V Input Voltage Range
Part Information
LM3530UME-40/NOPB image
RoHS Compliant
Description
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.
Specifications
Device Topology:
Boost (Step Up)
No. of Outputs:
1
Output Current:
29.5mA
Output Voltage:
40V
Driver Case Style:
DSBGA
Input Voltage Min:
2.7V
Input Voltage Max:
5.5V
Switching Frequency:
500kHz
Alternate Descriptions
LED DRVR 11Segment 3.3V/5V 12-Pin uSMD T/R Avnet America
LED DRVR 11Segment 3.3V/5V 12-Pin uSMD T/R Avnet Europe