Semtech SC5010超薄笔记本相移式8通道白光LED背光驱动方案
关键词：
led , sc5010 , semtech , 背光驱动 , 笔记本
semtech(升特)公司的 sc5010是超薄笔记本面板用的相移式8通道白光led背光驱动器,采用创新的pwm相移调光控制法,可使用1mm高的2.2μh微型电感，用于高效超薄的4mm厚度显示器.sc5010提供精确的背光色温以及全屏一致的亮度，通道间的电流匹配度为+/-1%，精度为+/-1.5%。它有完备的保护功能，包括led开路保护和可编程的led短路保护、可调过压保护（ovp），以及过热保护；另外还有欠压锁定（uvlo）关断功能。器件输入电4.5v至27v；输出电压最高达50v, 最高效率达92%,最多可驱动112只白光led,主要用在超薄笔记本电脑,umpc,lcd监视器和平板电脑.本文介绍了sc5010主要特性,方框图,led pwm调光控制框图,详细应用电路以及sepic配置图,高输出电压应用电路图.
the sc5010 is an 8-channel high-precision, high-effi ciency step-up (boost) led driver for backlight applications. it features wide input voltage range (4.5v to 27v) , fl exible output configuration, wide analog and pwm dimming range, phase shifting and fading. it also features video signal synchronization (vsync), i2c interface, and numerous protection features. an optional disconnect p-mosfet provides true load disconnection and inrush current limiting.
the boost controller, with programmable switching frequency from 200khz to 2.2mhz, maximizes effi ciency by dynamically minimizing the output voltage while maintaining led string current accuracy. it provides excellent line and load response with no external compensation components.
each linear current sink is matched within ±1% for superb lighting uniformity, and the accuracy of each string current is ±1.5%. an external resistor adjusts the current from 10-30ma per string. it also features pwm dimming resolution of 9 or 10 bits (user selectable) over 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.
sc5010 is available in a low-profi le, thermally enhanced, 4 x 4 x 0.6(mm) qfn 28-pin package.
sc5010主要特性:
vin range — 4.5v to 27v, vout range — up to 50v
step-up (boost) controller
excellent transient response
programmable switching frequency
linear current sinks
8 strings, up to 30ma/string
current matching ±1%
current accuracy ±1.5%
pwm dimming
string-by-string phase shifting
input dimming frequency 100hz-30khz
user selectable 9 or 10 bits dimming resolution
optional synchronization to vsync/hsync signal
5-bit analog dimming
optional external p-mosfet disconnect switch
true load disconnect and inrush current limiting
i2c interface
fault status — open/short led, uvlo, otp
device control — sync freq, pll setting
protection features
open/shorted led(s) and adjustable ovp
over-temperature and uvlo shutdown protection
4 x 4(mm) 28-pin qfn package
sc5010应用:
notebook pcs, umpc, lcd monitors, and tablet pcs
2011-9-13 11:10:42 上传
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图1.sc5010方框图
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图2.sc5010 led pwm调光控制框图
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图3.sc5010典型应用电路图
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图4.sc5010详细的应用电路图
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图5.sc5010sepic配置图
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图6.sc5010高输出电压应用电路图
详情请见:
sc5010[1].pdf(899.99 kb, 下载次数: 0)2011-9-25 21:09:20 上传
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semtech(升特)公司的 sc5010是超薄笔记本面板用的相移式8通道白光led背光驱动器,采用创新的pwm相移调光控制法,可使用1mm高的2.2μh微型电感，用于高效超薄的4mm厚度显示器.sc5010提供精确的背光色温以及全屏一致的亮度，通道间的电流匹配度为+/-1%，精度为+/-1.5%。它有完备的保护功能，包括led开路保护和可编程的led短路保护、可调过压保护（ovp），以及过热保护；另外还有欠压锁定（uvlo）关断功能。器件输入电4.5v至27v；输出电压最高达50v, 最高效率达92%,最多可驱动112只白光led,主要用在超薄笔记本电脑,umpc,lcd监视器和平板电脑.本文介绍了sc5010主要特性,方框图,led pwm调光控制框图,详细应用电路以及sepic配置图,高输出电压应用电路图.
the sc5010 is an 8-channel high-precision, high-effi ciency step-up (boost) led driver for backlight applications. it features wide input voltage range (4.5v to 27v) , fl exible output configuration, wide analog and pwm dimming range, phase shifting and fading. it also features video signal synchronization (vsync), i2c interface, and numerous protection features. an optional disconnect p-mosfet provides true load disconnection and inrush current limiting.
the boost controller, with programmable switching frequency from 200khz to 2.2mhz, maximizes effi ciency by dynamically minimizing the output voltage while maintaining led string current accuracy. it provides excellent line and load response with no external compensation components.
each linear current sink is matched within ±1% for superb lighting uniformity, and the accuracy of each string current is ±1.5%. an external resistor adjusts the current from 10-30ma per string. it also features pwm dimming resolution of 9 or 10 bits (user selectable) over 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.
sc5010 is available in a low-profi le, thermally enhanced, 4 x 4 x 0.6(mm) qfn 28-pin package.
sc5010主要特性:
vin range — 4.5v to 27v, vout range — up to 50v
step-up (boost) controller
excellent transient response
programmable switching frequency
linear current sinks
8 strings, up to 30ma/string
current matching ±1%
current accuracy ±1.5%
pwm dimming
string-by-string phase shifting
input dimming frequency 100hz-30khz
user selectable 9 or 10 bits dimming resolution
optional synchronization to vsync/hsync signal
5-bit analog dimming
optional external p-mosfet disconnect switch
true load disconnect and inrush current limiting
i2c interface
fault status — open/short led, uvlo, otp
device control — sync freq, pll setting
protection features
open/shorted led(s) and adjustable ovp
over-temperature and uvlo shutdown protection
4 x 4(mm) 28-pin qfn package
sc5010应用:
notebook pcs, umpc, lcd monitors, and tablet pcs
2011-9-13 11:10:42 上传
下载附件 (37.91 kb)
图1.sc5010方框图
2011-9-13 11:10:42 上传
下载附件 (16.12 kb)
图2.sc5010 led pwm调光控制框图
2011-9-13 11:10:42 上传
下载附件 (23.3 kb)
图3.sc5010典型应用电路图
2011-9-13 11:10:42 上传
下载附件 (28.76 kb)
图4.sc5010详细的应用电路图
2011-9-13 11:10:42 上传
下载附件 (25.6 kb)
图5.sc5010sepic配置图
2011-9-13 11:10:42 上传
下载附件 (26.84 kb)
图6.sc5010高输出电压应用电路图
详情请见:
sc5010[1].pdf(899.99 kb, 下载次数: 0)2011-9-25 21:09:20 上传
下载次数: 0
下载积分: 积分 -1
基尔霍夫定律有哪两种
智能可穿戴产品持续快速增长 一季度出货量同比增长三成
诺基亚8消失？诺基亚9网上引热评，真能比肩三星S8？
IOT网关是什么，它的功能都有哪些
Banana Pi BPI-P2 Zero开源硬件物联网开发板基准测试和评论
Semtech SC5010超薄笔记本相移式8通道白光LED背光驱动方案
5G时代不仅要快速传输 还要快速消化和应用
通过KNX使家庭和楼宇自动化的控制面板设计更简单
一文知道AOI的优点
高温磁翻板液位计的特点及应用
灯具产品标准CISPR15:2018版与2013版有哪些变化
终端产品中使用高通5G解决方案已超150款
Microchip推首款支持电容式旋转编码器检测和报告的车用级触摸屏控制器产品
胶水固含量测试注意事项
云对于传统IT有什么影响
激光熔覆再制造复兴矿山机械
超华科技坚持纵向一体化产业链发展战略
航嘉MVPVision机箱评测 创新的设计使人眼前一亮
物联网大数据开启医疗产业的医疗革命
Smartcardia开发无线电子贴片取代监测仪器