MBI6662 is a high efficiency, constant current and step-down DC/DC converter. It
is designed to deliver constant current to light up high power LEDs. With the adaptive hysteretic PFM control scheme, MBI6662 can achieve constant frequency operation under common anode connection. The output current of MBI6662 can be set by an external resistor, and LED brightness can be controlled via a pulse width modulation (PWM) signal through DIM pin. In addition, the soft-start function limits the inrush current while the power is turned on. MBI6662 also features under voltage lock out (UVLO), over temperature protection (OTP), and over current protection (OCP) to ensure system robustness and prevent IC and LEDs from being damaged once any abnormal condition occurs. To ensure system reliability, MBI6662 is equipped with thermal shutdown protection (TSD), which protects IC from overheating by turning off the internal MOSFET. MBI6662 is available in thermal-enhanced DFN-10 and SOP-10 package to handle power dissipation more efficiently.
特點(diǎn):
Maximum 2A constant output current
>95% efficiency @ input voltage 36V, load condition: 2A, 10 LEDs
4.5V~60V wide input voltage range
Common anode connection
Adaptive hysteretic PFM with adjustable fixed frequency operation
Tunable output current
Integrated power switch with 0.2Ω on-resistance
Full protections: UVLO/OCP/ Thermal/ LED Open-/ LED Short- Circuited
應(yīng)用:
Stage Lighting
High Power LED Wall-Washer
Automotive LED Lighting
Parallel Lighting Fixtures Connected by Common-Anode Scheme
醫(yī)療器械作為市場(chǎng)需求旺盛的朝陽產(chǎn)業(yè),近年來由小到大,迅速發(fā)展。其市場(chǎng)規(guī)模連續(xù)多年保持高位增長(zhǎng),產(chǎn)品出口數(shù)量和科技含量日益提升。隨著人民生活水平的明顯提高及健康意識(shí)的覺醒,醫(yī)療器械產(chǎn)品需求有望暴增。預(yù)計(jì)2018年我國醫(yī)療器械行業(yè)市場(chǎng)規(guī)模將達(dá)到2900億元。
眾所周知,醫(yī)療器械行業(yè)是多學(xué)科交叉、資金密集型的高技術(shù)產(chǎn)業(yè)。主要涉及醫(yī)藥、機(jī)械、電子等多個(gè)技術(shù)領(lǐng)域,其核心技術(shù)涵蓋高分子材料、檢驗(yàn)醫(yī)學(xué)、血液學(xué)、生命科學(xué)等。在市場(chǎng)需求的強(qiáng)烈刺激、國家政策的大力扶持下,醫(yī)療器械已成為衡量一個(gè)國家綜合實(shí)力與科學(xué)技術(shù)發(fā)展水平的重要標(biāo)志之一。
不言自明,國產(chǎn)醫(yī)療器械產(chǎn)品在技術(shù)能級(jí)、檔次方面,還是在產(chǎn)品功能、外觀以及操作便捷方面,與美、歐、日等發(fā)達(dá)國家有明顯的差距。對(duì)此,2015年5月,國務(wù)院印發(fā)《中國制造2025》,其中重點(diǎn)提出要提高醫(yī)療器械的創(chuàng)新能力和產(chǎn)業(yè)化水平。
在此發(fā)展背景下,衛(wèi)計(jì)委等多部門頒布多項(xiàng)政策支持我國醫(yī)療器械國產(chǎn)化。2017年8月,CFDA發(fā)文醫(yī)療器械臨床試驗(yàn)機(jī)構(gòu)將實(shí)行“備案管理”;2017年9月,CFDA發(fā)布新《醫(yī)療器械分類目錄》;2017年10月,中共中央辦公廳、國務(wù)院辦公廳印發(fā)了《關(guān)于深化審評(píng)審批制度改革鼓勵(lì)藥品醫(yī)療器械創(chuàng)新的意見》,利好政策密集出臺(tái),醫(yī)療器械市場(chǎng)規(guī)模正不斷擴(kuò)張。2017年醫(yī)療器械市場(chǎng)延續(xù)了近幾年的高增長(zhǎng)趨勢(shì),行業(yè)市場(chǎng)規(guī)模高達(dá)5233.4億元。
談及醫(yī)療器械產(chǎn)業(yè)的長(zhǎng)遠(yuǎn)發(fā)展,業(yè)內(nèi)一致認(rèn)為,政策、市場(chǎng)和新技術(shù)依然是影響我國醫(yī)療器械行業(yè)發(fā)展的主要因素。當(dāng)然,除政策上的持續(xù)發(fā)力外,趕超發(fā)達(dá)國家高端醫(yī)療器械技術(shù)水平,我國醫(yī)療器械企業(yè)還需要付出巨大努力。
想要在高端醫(yī)療器械領(lǐng)域有所建樹,企業(yè)必須加大研發(fā)投入水平。早篩技術(shù)、人工智能、3D打印、醫(yī)療機(jī)器人、石墨烯等新材料技術(shù)的發(fā)展,將為企業(yè)醫(yī)療器械設(shè)備自主創(chuàng)新提供更多可能。隨著人口老齡化的加劇,人們生活水平的提升和政策的大力支持,未來醫(yī)療器械行業(yè)仍有廣闊的成長(zhǎng)空間。
總體而言,目前我國高端醫(yī)療器械仍存在低端產(chǎn)品扎堆、產(chǎn)品同質(zhì)化現(xiàn)象凸顯,高端核心技術(shù)依賴進(jìn)口等發(fā)展難題?上驳氖,目前,國產(chǎn)醫(yī)療器械的創(chuàng)新研發(fā)、質(zhì)量升級(jí)提升到了前所未有的高度——國家戰(zhàn)略的位置。醫(yī)療器械國產(chǎn)化產(chǎn)業(yè)化發(fā)展、高端醫(yī)療器械設(shè)備研發(fā)創(chuàng)新之路正漸行漸近。