On Semi CAT3649
發布時間:2010/11/27 11:28:18 訪問次數:606
cat3649主要特性:
high efficiency 1.33x charge pump
quad−mode charge pump: 1x, 1.33x, 1.5x, 2x
drives up to 6 leds at 25 ma each
pwm dimming 100 hz to 200 khz for cabc
1−wire ezdim_ 32 linear steps (adim)
power efficiency up to 92%
low noise input ripple in all modes
“zero” current shutdown mode
soft start and current limiting
short circuit protection
thermal shutdown protection
3 mm x 3 mm, 16−pad tqfn package
this device is pb−free, halogen free/bfr free and is rohs compliant
cat3649典型應用:
lcd display backlight
cellular phones
digital still cameras
handheld devices
圖1.cat3649功能方框圖
圖2.cat3649典型應用電路
圖3.cat3649驅動5夾led的應用電路on semi公司的cat3649是具有32種調光亮度的六路四模式led驅動器,提供4種電荷泵模式(1倍、1.33倍、1.5倍及2倍), 這種分數型電荷泵支持從2.4 v到5.5 v的寬輸入電壓范圍。led電流可以通過單線(1-wire)接口以32個線性增量的模擬調光來調節,也可以通過pwm作進一步的調節,廣泛用于最新的智能手機及其它消費類手持應用,如數碼相機和便攜式媒體播放器(pmp)。
high efficiency 1.33x charge pump
quad−mode charge pump: 1x, 1.33x, 1.5x, 2x
drives up to 6 leds at 25 ma each
pwm dimming 100 hz to 200 khz for cabc
1−wire ezdim_ 32 linear steps (adim)
power efficiency up to 92%
low noise input ripple in all modes
“zero” current shutdown mode
soft start and current limiting
short circuit protection
thermal shutdown protection
3 mm x 3 mm, 16−pad tqfn package
this device is pb−free, halogen free/bfr free and is rohs compliant
cat3649典型應用:
lcd display backlight
cellular phones
digital still cameras
handheld devices
圖1.cat3649功能方框圖
圖2.cat3649典型應用電路
圖3.cat3649驅動5夾led的應用電路on semi公司的cat3649是具有32種調光亮度的六路四模式led驅動器,提供4種電荷泵模式(1倍、1.33倍、1.5倍及2倍), 這種分數型電荷泵支持從2.4 v到5.5 v的寬輸入電壓范圍。led電流可以通過單線(1-wire)接口以32個線性增量的模擬調光來調節,也可以通過pwm作進一步的調節,廣泛用于最新的智能手機及其它消費類手持應用,如數碼相機和便攜式媒體播放器(pmp)。
cat3649主要特性:
high efficiency 1.33x charge pump
quad−mode charge pump: 1x, 1.33x, 1.5x, 2x
drives up to 6 leds at 25 ma each
pwm dimming 100 hz to 200 khz for cabc
1−wire ezdim_ 32 linear steps (adim)
power efficiency up to 92%
low noise input ripple in all modes
“zero” current shutdown mode
soft start and current limiting
short circuit protection
thermal shutdown protection
3 mm x 3 mm, 16−pad tqfn package
this device is pb−free, halogen free/bfr free and is rohs compliant
cat3649典型應用:
lcd display backlight
cellular phones
digital still cameras
handheld devices
圖1.cat3649功能方框圖
圖2.cat3649典型應用電路
圖3.cat3649驅動5夾led的應用電路on semi公司的cat3649是具有32種調光亮度的六路四模式led驅動器,提供4種電荷泵模式(1倍、1.33倍、1.5倍及2倍), 這種分數型電荷泵支持從2.4 v到5.5 v的寬輸入電壓范圍。led電流可以通過單線(1-wire)接口以32個線性增量的模擬調光來調節,也可以通過pwm作進一步的調節,廣泛用于最新的智能手機及其它消費類手持應用,如數碼相機和便攜式媒體播放器(pmp)。
high efficiency 1.33x charge pump
quad−mode charge pump: 1x, 1.33x, 1.5x, 2x
drives up to 6 leds at 25 ma each
pwm dimming 100 hz to 200 khz for cabc
1−wire ezdim_ 32 linear steps (adim)
power efficiency up to 92%
low noise input ripple in all modes
“zero” current shutdown mode
soft start and current limiting
short circuit protection
thermal shutdown protection
3 mm x 3 mm, 16−pad tqfn package
this device is pb−free, halogen free/bfr free and is rohs compliant
cat3649典型應用:
lcd display backlight
cellular phones
digital still cameras
handheld devices
圖1.cat3649功能方框圖
圖2.cat3649典型應用電路
圖3.cat3649驅動5夾led的應用電路on semi公司的cat3649是具有32種調光亮度的六路四模式led驅動器,提供4種電荷泵模式(1倍、1.33倍、1.5倍及2倍), 這種分數型電荷泵支持從2.4 v到5.5 v的寬輸入電壓范圍。led電流可以通過單線(1-wire)接口以32個線性增量的模擬調光來調節,也可以通過pwm作進一步的調節,廣泛用于最新的智能手機及其它消費類手持應用,如數碼相機和便攜式媒體播放器(pmp)。
上一篇:IR IRS2053M
下一篇:聯通:iPhone入網新政