Texas Instruments LM3528
The LM3528 current mode boost converter offers two separate outputs. The first output (MAIN) is a constant current sink for driving series white LED’s. The second output (SUB/FB) is configurable as a constant current sink for series white LED bias, or as a feedback pin to set a constant output voltage for powering OLED panels.| Part No. | LM3528 |
|---|---|
| Datasheet | LM3528 Download |
| Manufacturer |  Texas Instruments |
| Description | Multi Display LED Driver |
| Buy | Stock & Price |
FEATURES
1●2 128 Exponential Dimming Steps
● Programmable Auto-Dimming Function
● Up to 90% Efficient
● Low Profile 12 Bump DSBGA Package (1.2mm x 1.6mm x 0.6mm)
● Integrated OLED Display Power Supply and LED Driver
● Programmable Pattern Generator Output for LED Indicator Function
● Drives up to 12 LED’s at 20mA
● Drives up to 5 LED’s at 20mA and delivers 18V at 40mA
● 1% Accurate Current Matching Between Strings
● Internal Soft-Start Limits Inrush Current
● True Shutdown Isolation for LED’s
● Wide 2.5V to 5.5V Input Voltage Range
● 22V Over-Voltage Protection
● 1.25MHz Fixed Frequency Operation
● Dedicated Programmable General Purpose I/O
● Active Low Hardware Reset
APPLICATIONS
● Dual Display LCD Backlighting for PortableAPPLICATIONS
● Large Format LCD Backlighting● OLED Panel Power Supply
● Display Backlighting with Indicator Light
DESCRIPTION
As a dual output white LED bias supply, the LM3528 adaptively regulates the supply voltage of the LED strings to maximize efficiency and insure the current sinks remain in regulation.
