? 2013 semtech corporation power management 1 high efciency 4-ch, 150ma/ch led driver with i 2 c interface and phase-shifte d pwm dim ming revision 2.3 SC5012Q sc5012 input voltage 4.75v to 45v output voltage up to 65v step-up (boost) controller ultra-fast transient response programmable switching frequency external sync frequency for boost controller linear current sinks 4 strings, up to 150ma/string current matching 1% current accuracy 2% pwm dimming string-by-string phase shifting dimming frequency 100hz-30khz user selectable 9 or 10 bits dimming resolution optional synchronization to vsync/hsync signal external frequency synchronization, fsync 8-bit analog dimming i 2 c interface fault status open/short led, otp device control: sync freq, pll setting protection features open/shorted led(s) and adjustable ovp over-temperature 4mm x 4mm 24 ld qfn package aec-q100 qualifed version available ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? description the sc5012/q is a 4-channel high-precision, high-effi - ciency step-up (boost) hb led driver designed for back - light applications. it features wide input voltage range (4.75v to 45v) , fexible output confguration, wide analog and pwm dimming range, phase shifting, optional fading, external boost controller frequency synchronization (fsync), i 2 c interface, and numerous protection features. the boost controller, with programmable switching fre - quency from 200khz to 2.2mhz, can maximize efciency by dynamically minimizing the output voltage while maintaining led string current accuracy. it provides excel - lent line and load response with no external compensa - tion components. each linear current sink is matched within 1% for superb lighting uniformity, and the accu - racy of each string current is 2%. an external resistor adjusts the current from 40-150ma per string. it also fea - tures pwm dimming resolution of 9 or 10 bits (user select - able) over a dimming frequency from 100hz to 20khz, synchronized to the sync signal or the boost oscillator. string-by-string phase shifting reduces the demand on the input/output capacitance, decreases emi, and improves dimming linearity. sc5012/q is available in 4mm x 4mm 24 ld qfn package. the SC5012Q is an aec-q100 qualifed version. typical application circuit drvn cs agnd iset fset cpll scp vin sc5012 pwmi pwmi r15 r4 r5 flt c21 vldo flt vcc ss sda pgnd r8 r7 c4 r6 r9 q1 c1 l1 sync sync ovp r10 r11 v out up to 65v v in 4.75 to 45v up to 150ma/ch i 2 c scl i 2 c io1 io2 io3 c6 io4 fsync fsync en c22 r24 c20 vldo SC5012Q features applications medium-sized lcd panel automotive car navigation/information display lcd monitors automotive aec-q100 qualifed application ? ? ? ?
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