Texas Instruments LM3538
The LM3538 is a highly integrated LED driver capable of driving 6 LEDs in parallel for single display backlighting applications. The LM3538 provides multizone Ambient Light Sensing allowing autonomous backlight intensity control in the event of changing ambient light conditions. The LM3538 provides excellent efficiency without the use of an inductor by operating the charge pump in a gain of 3/2 or in Pass-Mode.| Part No. | LM3538 |
|---|---|
| Datasheet | LM3538 Download |
| Manufacturer |  Texas Instruments |
| Description | 6-Channel WLED Driver |
| Buy | Stock & Price |
FEATURES
1 2Lighting:● 6-channel Backlight Capability
● Internal ALS Engine; PWM Input to Support CABC
● Built-in Power Supply and Gain Control for Ambient Light Sensor
● Up to 90% Efficiency
● Adaptive Charge Pump with 1x and 1.5x Gains for Maximum Efficiency
● 128 Dimming Steps for Group A, Exponential or Linear Dimming Selectable by Register Setup
● 8 Linear Dimming States for Group B LDOs:
● 4 Programmable LDOs (300mA/150mA Output Currents)
● Default Startup Voltage States
● Low Dropout Voltage: 100mV typ. at 150mA Load Current
● LDO Input Voltage = 1.8V to VIN_A
● Overload Protection Combined Common
FEATURES
:● Wide Input Voltage Range: 2.7V to 5.5V
● I2C-compatible Serial Interface
● 2 General-purpose Outputs
DESCRIPTION
Independent LED control allows for a subset of the main display LEDs to be selected for partial illumination applications. I2C-compatible control allows full configurability of the backlighting function. A PWM input is also provided to give the user a means to adjust the backlight intensity dynamically based upon the content of the display.
