SC620 Octal LED Driver, General Purpose Current Sink with Serial Interface POWER MANAGEMENT Features Description The SC620 is a multi-purpose LED driver with eight identi- Wide current setting range 31.25A to 25mA cal, independently controlled current sinks. Each current Eight identical current drivers with independent sink can drive an LED by connecting the LEDs anode to control the system power supply and the cathode to the current 5% current matching, 7% accuracy sink input pin. Any combination of outputs can be enabled 2 I C interface for microprocessor control or disabled for optimal design fl exibility. 2 I C slave address 1110 000x Less than 1A quiescent current in shutdown The SC620 also employs an adjustable global current gain Low dropout voltage 150mV setting register to allow the current setting step size to Over-temperature protection vary from 31.25A to 500A. This provides a wide range of MLPQ-UT-16 package (3mm x 3mm) options for LED variation and dimming functions. The Ultra-thin 0.6mm maximum package height maximum output is also scaled by this step size, with a Fully WEEE and RoHS compliant maximum of 25mA at the highest step setting. Applications Multi-colored and white LEDs with diff erent forward volt- ages can be driven using the same SC620 due to its fl oat- LCD backlighting LED driver ing cathode technology. This feature allows each output Multicolor and RGB LED driver pin to vary in voltage from 150mV to V - 1.5V. IN General purpose current sink array General purpose digital output (open-drain) expander 2 All current control is programmed using an I C interface Auto-focus voice-coil driver bus. Only a single input bypass capacitor is required no other external resistors or capacitors are needed. The 3mm x 3mm MLPQ package and minimal support components make the SC620 an ideal solution for low-cost, area-con- scious backlighting designs. Typical Application Circuit LED Backlighting Main Panel Sub Panel Color/R/G/B LEDs Battery 1 F SC620 IN ILED1 SCL SCL ILED2 SDA SDA ILED3 EN EN ILED4 GND ILED5 GND ILED6 GND GND ILED8 April 22, 2009 2009 Semtech Corporation 11 ILED7SC620 Pin Confi guration Ordering Information Device Package (1)(2) (2) SC620ULTRT MLPQ-UT-16 33 SC620EVB Evaluation Board 16 15 14 13 Notes: GND GND 1 12 TOP VIEW (1) Available in tape and reel only. A reel contains 3,000 devices. IN SCL (2) Lead-free package only. Device is WEEE and RoHS compliant. 2 11 EN 3 10 SDA T GND 4 9 GND 5678 MLPQ-UT-16 3x3, 16 LEAD = 39C/W JA Marking Information 620 yyww xxxx yy = two digit year of manufacture ww = two digit week of manufacture xxxx = lot number 22 ILED1 ILED8 ILED2 ILED7 ILED3 ILED6 ILED4 ILED5