LM3431 Description
The LM3431 is a 3-channel linear current controller bined with a boost switching controller ideal for driving LED backlight panels in space critical applications. The LM3431 drives 3 external NPN transistors or MOSFETs to deliver high accuracy constant current to 3 LED strings. Output current is adjustable to drive strings in excess of 200 mA.
LM3431 Key Features
- 2 LM3431Q/LM3431AQ are Automotive Grade Products that are AEC-Q100 Grade 1 Qualified (-40°C to 125°C operating junction
- 3-Channel Programmable LED Current
- High Accuracy Linear Current Regulation
- Analog and Digital PWM Dimming Control
- Up to 25kHz Dimming Frequency
- >100:1 Contrast Ratio
- Integrated Boost Controller
- 5V-36V Input Voltage Range
- Adjustable Switching Frequency up to 1MHz
- LED Short and Open Protection