聯(lián)系人:陳小姐 手機13714441972
電話:0755-83259945QQ:3529086935主營LED驅(qū)動IC等電子元件車燈IC
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:
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
虛擬貨幣過去一年來價格飆漲,帶動挖礦需求大增,半導(dǎo)體供應(yīng)鏈業(yè)績火紅。然近日顯卡廠商示警指出,除虛擬貨幣跌幅驚人,挖礦報酬率下降意外,由臺積電、比特大陸及NVIDIA等3大廠最新業(yè)務(wù)展望及策略布局可觀察,挖礦潮正逐步降溫中。失速的GPU挖礦列車首當(dāng)其沖,ASIC礦機訂單爆發(fā)動能亦會逐季回穩(wěn),GPU挖礦供應(yīng)鏈下半年業(yè)績將明顯低于2017年同期高峰。
比特幣于2017年初起一路飆漲,12月初攀升近2萬美元,帶動全球挖礦潮持續(xù)增溫,不論是以計算比特幣為主的ASIC礦機,或是以萊特幣、以太幣等為主的GPU礦機,均呈現(xiàn)出供不應(yīng)求的火爆,帶動全球相關(guān)供應(yīng)鏈爭相搶進。其中,GPU礦機供應(yīng)鏈在NVIDIA、超微(AMD)領(lǐng)軍下,不僅全數(shù)業(yè)績逐季揚升,顯卡出貨及獲利更寫下歷史新高,帶動股價上演大驚奇,市場投機氣焰不斷擴大,
然受到近日比特幣等虛擬貨幣大跌、多國市場出現(xiàn)交易異常與詐騙犯罪、中國大陸相關(guān)機構(gòu)未來可能全面封鎖虛擬貨幣交易市場,同時嚴(yán)禁礦場設(shè)立與挖礦業(yè)務(wù),還有挖礦所帶來的電力等能源消耗危機等利空,臺灣地區(qū)板卡廠商股價連日走跌,跌幅同樣令人驚嘆。
臺灣地區(qū)顯卡廠商表示,盡管市場彌漫著礦工搶貨、GPU飆漲有錢也買不到的大缺貨氛圍,但其實近日已見挖礦潮開始趨緩跡象,除比特幣等虛擬貨幣跌幅驚人,挖礦報酬率下降外,由臺積電、比特大陸及NVIDIA等3大廠商最新業(yè)務(wù)展望及策略布局可觀察,挖礦需求正逐步收斂中。
首先,過去一年來失速的GPU挖礦列車將首當(dāng)其沖,可由臺積電董事長張忠謀先前預(yù)告虛擬貨幣會是驅(qū)動臺積電2018年業(yè)績的主要動能,帶動上半年整體營收年增10~15%來觀察。事實上,助攻臺積電營收成長的關(guān)鍵來自比特大陸的ASIC礦機,以及即將量產(chǎn)可挖以太幣的新礦機大單等,后者勢將對GPU礦機帶來訂單排擠效應(yīng),屆時GPU價格回落已可預(yù)見。
此外,因擁有GPU大宗市占而掌握供需與行情的NVIDIA,近期也不斷向合作伙伴祭出多項限制,禁止公開宣揚挖礦效益,或是主動向礦主推銷一般消費性顯卡,希望能將市場需求重新導(dǎo)回至電競玩家為主。而過去一年來顯卡多次漲價,除因應(yīng)顯示內(nèi)存大漲外,出貨管控導(dǎo)致缺貨也是推力之一。近日NVIDIA再次上調(diào)報價,也被解讀為已預(yù)見GPU挖礦需求衰退走勢,因此急忙采取漲價以彌補未來出貨下滑影響獲利的缺口。
另一點可預(yù)見的是,NVIDIA與AMD不斷延后新品推出與延長制程成熟的舊產(chǎn)品生命周期,說明這兩家公司均已相當(dāng)清楚除了突然涌現(xiàn)的挖礦潮外,事實上,顯卡未來獲利成長動能正不斷減緩中。其中,NVIDIA不僅下一代圖形芯片圖靈(Turing)架構(gòu)系列第3季才會放量,未來戰(zhàn)略也將大打自有品牌,高端高毛利產(chǎn)品將由NVIDIA自行推出,與華碩、微星、技嘉及七彩虹等眾多合作伙伴爭利以維持獲利成長及不斷補給搶進AI戰(zhàn)場所耗費的銀彈。
臺灣地區(qū)顯卡廠商進一步指出,雖然GPU礦機將明顯感受到ASIC礦機取代效應(yīng)增強,且以臺積電為首的ASIC礦機供應(yīng)鏈對于后市相當(dāng)樂觀,但再觀察比特大陸已察覺到礦機投資所帶來的高風(fēng)險,近期已積極投入AI領(lǐng)域以分散業(yè)務(wù)風(fēng)險,同時張忠謀亦強調(diào)虛擬貨幣價格非常不穩(wěn)定,臺積電不會特別為此投資新產(chǎn)能,ASIC礦機需求爆發(fā)力與續(xù)航力仍有待觀察。