Overview

Description

The ISL98611 is a high-efficiency display power supply and LED driver for small size displays, such as smart phones. It integrates a boost regulator, LDO, and inverting charge pump that are used to generate regulated positive and negative voltages for display power. It also integrates a boost regulator and 3-channel current sinks for the LED backlight driver. The positive and negative output voltages can be adjusted from ±4. 5V up to ±6V. The ISL98611 extends the battery life of mobile devices by delivering greater than 88% efficiency for the display power function and up to 93% efficiency for the backlight driver when powering 12 LEDs. It reduces the PCB area by integrating the two functions into a single IC and by requiring only eight external components in total. This product drives backlight LEDs with excellent current matching even at very low LED current (±2. 2% down to 1mA and ±2. 8% at 50μA), improving the brightness uniformity of LCD displays. It includes analog, PWM, and hybrid dimming to maximize LED efficiency while eliminating color shift issues. The ISL98611 is offered in a 2. 33x2. 61mm2 WLCSP package and the device is specified for operation across the -40°C to +85°C ambient temperature range.

Features

  • Display power output voltage: ±5V, ±5.6V
  • Positive and negative voltages can be programmed from ±4.5V to ±6V
  • >88% efficiency with 12mA load between VP and VN
  • Up to 93% efficient LED driver
  • Only 8 external components; integrated compensation and feedback circuits
  • Analog, PWM, and hybrid dimming
  • ±2.2% current matching down to 1mA and ±2.8% at 50μA
  • Can drive 2 strings of LEDs
  • 10-bit linear and 11-bit logarithmic DC output current control
  • I2C, PWM, and SWIRE dimming inputs with internal multiplier for CABC
  • 2.5V to 5V input voltage range
  • VP and VN output adjustable from ±4.5V up to ±6V with 50mV steps
  • I2C adjustable output voltages and settings
  • 1μA shutdown supply current
  • RoHS compliant

Comparison

Applications

Applications

  • TFT-LCD Smart phone displays
  • Small size/handheld display

Documentation

Type Title Date
Datasheet - Short-form PDF 227 KB
End Of Life Notice PDF 1.17 MB
Product Change Notice PDF 99 KB
Datasheet Log in to Download PDF 3.59 MB
Product Change Notice PDF 150 KB
5 items

Design & Development

Software & Tools

Software Downloads

Type Title Date
PCB Design Files ZIP 630 KB
1 item

Models