驱动IC
RICHTEK/立錡
RT9284
12
白光LED驱动芯片
6
仪器
SOT23-6
2013
类型:经销商
电话:
手机:15817468549
联系人:何丽贤
地址:广东深圳中国 广东 深圳市福田区 TEL:158 1746 8549 Q Q :1160453817(海纳百川) 华强北中航路新亚洲2期N2B071
白光LED驱动--RT9284
RT9284为一*率升压(boost)白光LED驱动IC,可以同时驱动4颗串联白光LED以及支持100Hz to 100KHz的微控频率,这样即可*避免噪音产生。另外,当白光LED出现异常情况下,具有过电压保护功能的RT9284可以*保护其周边元器件。
RT9284采用薄型SOT封装,使用者可以大幅减低所需板裁面积。
白光LED驱动IC--SN3228
Applications
l White LED backlighting
l Mp3, Mp4, PMP
l Cell phone, *art phone, PDA
Features
l UTQFN-12 (2mm × 2mm ) package
l Low shutdown current: ISHDN <3μA
l Automatic soft start
l Built-in thermal protection
l No inductors, low noise operation
l Drives up to four (SN3228A)/six (SN3228B) channels of LEDs -14 current levels
l Fully programmable current with single wire
l VCC range: 2.8V to 5.5V
Description
The SN3228A (SN3228B) is a low noise, constant frequency charge pump DC/DC converter for white LED applications. The SN3228A (SN3228B) is capable of driving up to four (six) channels of LEDs at preset 20mA per channel from a 2.8V to 5.5V input. The current sinks may be operated individually or in parallel for driving higher current LEDs. Only one 1μF *all capacitor (at C thru C-) and two *all 2.2μF capacitors (at VCC and VOUT) are needed, it makes this part ideally suited for *all, battery-powered applications.
The serial di*al input is used to enable, disable, and set current for each LED with 14 settings down to 1.8mA. Each output of the SN3228A/SN3228B is equipped with built-in soft-start circuitry prevents excessive inrush current during start-up. A low-current shutdown feature disconnects the load from the input and reduces quiescent current to less than 3μA.The SN3228A and SN3228B are available in a Pb-free, space-saving 2mm × 2mm UTQFN-12 package.
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类型:经销商
电话:
手机:15817468549
联系人:何丽贤
地址:广东深圳中国 广东 深圳市福田区 TEL:158 1746 8549 Q Q :1160453817(海纳百川) 华强北中航路新亚洲2期N2B071
友情链接: 深圳市元东发电子有限公司