LT1942 - Quad DC/DC Converter for Triple Output TFT Supply Plus LED Driver

The LED driver is a boost DC/DC converter that can be independently controlled. The LED driver has built-in dimming control for precise control of LED current. An 8:1 dimming range is achieved by adjusting the CTRL4 voltage.The user can elect to drive a single string or two strings of LEDs. An LED ballast circuit is included to precisely match the LED currents if two strings of LEDs are used. Soft-start is built into the LED driver as well as the primary TFT supply.

The LT1942 is available in a low profile (0.75mm) 24-lead QFN (4mm × 4mm) package.

特点

Triple Output TFT Supply with Built-In Power Sequencing
Integrated White LED Backlight Driver
Integrated Schottky Diodes
Active Ballast Circuitry Ensures Precise Current Matching in White LEDs
Low Noise 1MHz Fixed Frequency Operation
2.6V to 16V Input Voltage Range
Soft-Start Limits Inrush Current
TFT Supply Output Voltages Independently Set (Not Charge Pump Derived)
Power Good and Output Disconnect for TFT Supply
Built-In LED Dimming Capability
Open LED Protection for LED Driver
24-Lead QFN Package (4mm × 4mm)

典型应用

应用

Poly-Silicon TFT Displays
Amorphous Silicon TFT Displays

封装信息

**Order Information 订购型号**
器件型号	封装	温度	价格 (以 1 ~ 99 片为批量)	价格 (以 1000 片为批量) *
LT1942EUF#PBF	4x4 QFN-24	E	$3.27	$2.75
LT1942EUF#TRPBF	4x4 QFN-24	E		$2.85

演示电路板


器件型号	描述	价格
DC688A	LT1942EUF \| Quad Converter For TFT Supply and LED Driver, Vin=3V-4.5V, Von=10V/2mA, Voff=-10V/2mA, AVdd=5V/40mA	$100.00