Texas Instruments LM3530
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.| Part No. | LM3530 |
|---|---|
| Datasheet | LM3530 Download |
| Manufacturer |  Texas Instruments |
| Description | High-Efficiency White-LED Driver |
| Buy | Stock & Price |
FEATURES
●1 Drives up to 11 LEDs in series● 1000:1 Dimming Ratio
● 90% Efficient
● Programmable Dual Ambient Light Sensor Inputs with Internal ALS Voltage Setting Resistors
● I2C Programmable Logarithmic or Linear Brightness Control
● External PWM Input for Simple Brightness Adjustment
● True Shutdown Isolation for LEDs and Ambient Light Sensors
● Internal Soft-Start Limits Inrush Current
● Wide 2.7-V to 5.5-V Input Voltage Range
● 40-V and 25-V Overvoltage Protection Options
● 500-kHz Fixed Frequency Operation
● 839-mA Peak Current Limit 2
APPLICATIONS
● Smartphone LCD Backlighting● Personal Navigation LCD Backlighting
● 2 to 11 Series White-LED Backlit Display Power Source space 3
DESCRIPTION
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.
