skyworks solutions, inc. ? phone [781] 376 - 3000 ? fax [781] 376 - 3100 ? sales@skyworksinc.com ? www.skyworksinc.com 202714d ? skyworks proprietary i nformation ? products and product informatio n are subject to change without notice ? march 29 , 2013 1 product summary sky81452 - 13 : six - channel, high efficiency white led driver with touch screen driver supply applications ? tablet pcs ? notebook computers ? monitors ? portable tv/dvd players features ? input voltage range: 2.5 v to 5.5 v ? integrated 28 v boost conve rter ? minimum off time: 50 ns ? adjustable switching frequency ? frequency range: 600 khz to 2 mhz ? up to 93% efficiency ? boost current limit selection ? six current sinks ? up to 28 v, 60 ma per channel ? accuracy matching: 1.5% @ 25 c, 30 ma ? fade in/out feature for brightness control ? i 2 c interface control ? individual channel enable/disable, fault trigger point, and status programming ? eight - bit/256 programmable analog dimming ? pwm output frequency, led current control ? direct pwm dimming (100 hz to 50 khz) ? fault protect ion and independent channel shutdown for: ? open or shorted led(s) ? boost over - voltage and current protection ? over temperature condition ? ultra small, low profile wlcsp (25 - bump, 2.44 mm x 2.44 mm) package (msl1, 260 c per jedec j - std - 020) description the s ky81452 - 13 is a highly integrated, high efficiency led backlight solution for tablet s , notebook computers, monitors , and other portable devices. an integrated boost converter provides a high voltage output for driving up to 28 v. six precision current sink s are programmable up to 60 ma per string. the integrated boost regulator switching frequency is adjustable from 600 khz to 2 mhz for system integration flexibility, which optimizes efficiency and minimize s external passive component requirements. the sky8 1452- 13 supports direct pulse width modulation ( dpwm ) dimming and analog dimming modes. in the dpwm dimming mode, the output waveform follow s the pulse width modulation input (pwm i ) signal and the current level is set by i 2 c control and an external rset re sistor. in the analog dimming mode , the pwm i signal duty and the i 2 c brightness control signal are multiplied to control the output current level. when the pwm pin is not used, it should be pulled high . for system protection, the sky81452 - 13 senses open or short led conditions and over temperature events. high voltage current sink design prevents damage resulting fro m shorted leds. system faults are reported through the i 2 c interface. the sky81452 - 13 is available in a space saving 2.44 mm x 2.44 mm, 25- bump wafer - level chip scale package (wlcsp). typical application circuits are shown in figure 1 (single cell input) and in figure 2 (dual cell input). http://www..net/ datasheet pdf - http://www..net/
product summary ? sky81452- 13 six - channel boost led dr iver with touch screen dr iver supply 4lxpslt4pmvupotodt1ipo - t - tmsts 2 .si ts sss st ss s n sii t figure 1. typical application circuit (single cell input ) http://www..net/ datasheet pdf - http://www..net/
product summary ? sky81452- 13 six - channel boost led dr iver with touch screen dr iver supply 4lxpslt4pmvupotodt1ipo - t - tmsts ts sss st ss s n sii t .si figure 2. typical application circuit ( dual cell input) http://www..net/ datasheet pdf - http://www..net/
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