전자부품 데이터시트 검색엔진 |
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SC620 데이터시트(PDF) 1 Page - Semtech Corporation |
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SC620 데이터시트(HTML) 1 Page - Semtech Corporation |
1 / 16 page Description January 16, 2007 Typical Application Circuit The SC620 is a multi-purpose LED driver with eight identi- cal, independently controlled current sinks. Each current sink can drive an LED by connecting the LED’s anode to the system power supply and the cathode to the current sink input pin. Any combination of outputs can be enabled or disabled for optimal design flexibility. In addition to the individual current settings, the SC620 employs an adjustable global current gain setting register to allow the current setting step size to vary from 31.25μA to 500μA, giving the designer a wide range of options for LED variation and dimming functions. The maximum output is also scaled by this step size, with a maximum of 25mA at the highest step setting. Multi-colored and white LEDs with different forward volt- ages can be driven using the same SC620 due to its floating cathode technology. This feature allows each output pin to vary in voltage from 150mV to V IN - 1.5V. All current control is done via an I2C interface bus. Only a single input bypass capacitor is required - no other exter- nal 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-conscious backlighting designs. Eight identical current drivers with independent control Wide current setting range - 31.25μA to 25mA 3% current matching, 5% accuracy I2C interface for microprocessor control I2C slave address 1110 000x Less than 1μA quiescent current in shutdown Low dropout voltage: ≤ 150mV Over-temperature protection MLPQ-UT-16 package (3mm x 3mm) Ultra-thin 0.6mm maximum package height Fully WEEE and RoHS compliant LCD backlighting LED driver Multicolor and RGB LED driver General purpose current sink array General purpose digital output (open-drain) expander Auto-focus voice-coil driver Features Applications Battery SC620 VIN 2 SCL 11 SDA 10 EN 3 GND 1 GND 4 GND 9 GND 12 ILED1 5 ILED2 6 ILED3 7 ILED4 8 ILED6 14 ILED7 15 ILED8 16 ILED5 13 Sub Panel Color/R/G/B LEDs 1μF SCL SDA EN Main Panel LED Backlighting www.semtech.com 1 POWER MANAGEMENT SC620 Octal LED Driver, General Purpose Current Sink with Serial Interface |
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