DATASHEET To request the full datasheet, please visit www.intersil.com/products/isl98611a High Efficiency Display Power and LED Driver for Smart Phones ISL98611A Features The ISL98611A 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 two output rails for the display power: +5V (default) and -5V (default). It also integrates a boost regulator and 3-channel current sinks for the LED backlight driver. The ±5V output voltages can be adjusted from ±4.5V up to ±6V. • >87% efficiency with 12mA load between VP and VN • More than 90% efficient LED driver • Only 9 external components; integrated compensation and feedback circuits • Analog, PWM and hybrid dimming • ±2.2% current matching down to 1mA • Can drive 2 or 3 strings of LEDs ISL98611A extends the battery life of mobile devices by delivering greater than 87% efficiency for the display power function. For a backlight driver ISL98611A uses nonsynchronous rectification and by using a 3-channel topology ISL98611A provides more than 90% efficiency. ISL98611A integrates all compensation and feedback components, which minimizes BOM count and reduces the solution PCB size. • 35V maximum VLED voltage • 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 This product drives backlight LEDs with excellent current matching even at very low LED current (±2.2% down to 1mA), improving the brightness uniformity of LCD displays. It includes analog, PWM and hybrid dimming to maximize LED efficiency while eliminating color shift issues. • I2C adjustable output voltages and settings • 1µA shutdown supply current • Pb-free (RoHS compliant) The ISL98611A 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. Applications • TFT-LCD smart phone displays • Small size/handheld display 3P6S 30mA/string VIN 2.5V TO 5V L2 10µH CIN 10µF 0402 L1 2.2µH VIN CVLED 4.7µF 0603 LXLED VLED CH0 CH1 CH2 LXBST ISL98611A VBSTCP VBST CP CCP 10µF 0402 CVBST 10µF 0402 FAULT PROCESSOR SWIRE PWMI SCL SDA ENP ENN ENLED CN CVN 10µF 0402 VN VSUB AGND PGND VP -5.0V NEGATIVE SUPPLY LCD PANEL POSITIVE SUPPLY CVP 10µF 0402 +5.0V FIGURE 1. TYPICAL APPLICATION CIRCUIT FOR 3-CHANNEL LED DRIVER July 29, 2015 FN8742.1 1 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 1-888-468-3774 | Copyright Intersil Americas LLC 2015. All Rights Reserved Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries. All other trademarks mentioned are the property of their respective owners. ISL98611A For additional products, see www.intersil.com/en/products.html Intersil products are manufactured, assembled and tested utilizing ISO9001 quality systems as noted in the quality certifications found at www.intersil.com/en/support/qualandreliability.html Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries. For information regarding Intersil Corporation and its products, see www.intersil.com Submit Document Feedback 2 FN8742.1 July 29, 2015