Milpitas, Calif. – Intersil Corporation has introduced the single-chip ISL98611 display power and LED driver for smartphones. The company touts the ISL98611 as the first power management IC that integrates the display power and backlight LED driver functions in a single chip, improving efficiency of both functions to increase smartphone battery life by an hour or more.
In addition to extending battery life, the ISL98611 also is said to improve display brightness uniformity and color consistency. The ISL98611 integrates a boost regulator, LDO and inverting charge pump for generating two output rails at +5V and -5V in a single device. It also includes a boost regulator with 3-channel current sinks for the LED backlight driver.
According to Intersil, this single-chip solution offers designers four key benefits: extended battery life, improved display uniformity, better display color consistency, and space savings.
- Extended battery life: The ISL98611 backlight LED driver delivers seven percent higher efficiency (up to 93 percent) than competitive multi-chip solutions and generates +/-5V display power supplies with greater than 88 percent efficiency at 15 mA load using a 2.5- x 2-mm2 size inductor, compared to 85 percent efficiency of the nearest competitor.
- Improved display uniformity: The ISL98611 achieves +/- 2.2 percent matching down to 1 mA and +/- 2.8 percent at 50μA.
- Improved display color consistency: Hybrid dimming eliminates white LED color shift issues at low LED current, which occur with DC dimming.
- Smallest footprint: The ISL98611’s total display power plus backlight solution uses 24 percent less PCB area compared to the competition, while requiring only eight external components, providing additional space for the battery.
“With each new product generation, smartphone designers are challenged to add more features, reduce size and extend battery life,” said Andrew Cowell, senior vice president of Intersil’s Mobile Power Products, in a statement. “The ISL98611 delivers the integration, extended battery life and display image quality improvement our customers want in their next-generation smartphone designs.”
Availability: Available now in a 2.33- x 2.61-mm2, 30-ball WLCSP package.
Pricing: $1.50 in quantities of 1,000. The ISL98611EVAL1Z evaluation board can be purchased for $100 each.