
The HV9919B is a PWM controller IC designed to drive high brightness LEDs using a buck topology. It operates from an input voltage of 4.5 to 40VDC and employs hysteretic controlwith a high-side current sense resistor to set the constant output current.The operating frequency range can be set by selecting the proper inductor. Operation at high switching frequency is possible since the hysteretic control maintains accuracy even at high frequencies. This permits the use of small inductors and capacitors minimizing space and cost in the overall system.LED brightness control is achieved with PWM dimming from an analog or PWM input signal. Unique PWM circuitry allows true constant color with a high dimming range. The dimming frequency is programmed using a single external capacitor.The HV9919B comes in a small, 8-Lead DFN package and is ideal for industrial and general lighting applications.
Hysteretic control with high-side current sensing
Wide input voltage range: 4.5 to 40V
>90% Efficiency
Typical ±5% LED current accuracy
Up to 2.0MHz switching frequency
Adjustable constant LED current
Analog or PWM control signal for PWM dimming
Over-temperature protection
-40oC to +125oC operating temperature range
HV9919B 封裝圖
型號(hào) | 制造商 | 描述 | 購買 |
---|---|---|---|
HV9919BK7-G | ST | IC DRIVER 4/0 24SSOP | 立即購買 |
ADF4113HV電荷泵可以直接利用無源環(huán)路濾波器來驅(qū)動(dòng)高壓VCO。ADF4113HV可以用來在無線接收機(jī)和發(fā)射機(jī)的上變頻和下變頻部分實(shí)現(xiàn)本振。它由低噪聲數(shù)字鑒頻鑒相器(PFD)、精密高壓電荷泵、可編程參考分頻器、可編程A和B計(jì)數(shù)器以及雙模預(yù)分頻器(P/P+1)組成。
光博會(huì),又稱中國國際光電博覽會(huì),深耕行業(yè)22載,集聚光電產(chǎn)業(yè)優(yōu)勢(shì)資源,2020年中國國際光電博覽會(huì)同期六展覆蓋信息通信、數(shù)據(jù)中心、激光、紅外、精密光學(xué)、鏡頭及模組、機(jī)器視覺、光電傳感等版塊,面向光通信、信息處理及存...
的成本相對(duì)傳統(tǒng)的CMOS 要高很多。對(duì)于一些用途單一的LCD 和LED高壓驅(qū)動(dòng)芯片,它們的要求是驅(qū)動(dòng)商壓信號(hào),并沒有大功率的要求,所以一種基于傳統(tǒng) CMOS 工藝制程技術(shù)的低成本的HV-CMOS 工藝
高壓 LM317HV 系列 IC 將超越 LM317 IC 的傳統(tǒng)電壓限制,并能夠控制可能高達(dá) 60V 的電源。
2015年7月2日,德國慕尼黑訊HV-ModAL研究項(xiàng)目旨在進(jìn)一步提高電動(dòng)汽車動(dòng)力總成的功率。HV-ModAL希望在今后三年內(nèi),打造出一個(gè)適用于不同制造商生產(chǎn)的各類電動(dòng)汽車的電力動(dòng)力總成模塊化系統(tǒng)工具箱。包括英飛凌在內(nèi)的來自汽車...
富士通半導(dǎo)體推出了用于HV/EV電機(jī)控制的32位微控制器MB91580系列,以及用于駕駛輔助顯示控制的系統(tǒng)LSI MB86R11。我們不妨來看看兩款器件到底有哪些具體功能和特點(diǎn),又在汽車中發(fā)揮怎樣
此降壓型拓?fù)浣Y(jié)構(gòu)電路并沒有與線電壓隔離。 LED 必須在交流電源開啟之前就與驅(qū)動(dòng)器相通連。
LV/HV P-Well BCD技術(shù)能夠?qū)崿F(xiàn)低壓 5 V 與高壓 100~700 V(或更高)兼容的 BCD 工藝。為了便于高低壓 MOS 器件兼容集成,采用源區(qū)為硼磷雙擴(kuò)散形成溝道的具有漂移區(qū)的偏置柵結(jié)構(gòu)的 HV LDMOS 器件。改變漂移區(qū)的長度,寬度,結(jié)深度以...
HMC729 | HMC596 | HMC562 | HMC576-Die |
HV9110 | HMC586 | HMC752 | HMC490-Die |
HMC859 | HMC-C043 | HCPL2630 | HMC270A |
HMC-APH478 | HMC-C003 | HMC639 | HMC1086F10 |
HMC648A | HMC588 | HMC683 | HMC7885 |