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On Semi公司的NCV8855是集成了高邊負載開關的多輸出電源控制器/穩壓器,能滿足汽車無線系統和儀表盤電源的要求. NCV8855還集成了開關電源(SMPS)降壓控制器,2.5A SMPS降壓穩壓器和兩個低壓降(LDO)線性穩壓器控制器,和超低靜態電流的NCV861x一起能組成8輸出的無線系統或儀表盤電源解決方案.器件滿足ES−XW7T−1A278−AB測試脈沖G負載條件,VIN工作電壓9.0V-18.0V.本文介紹了NCV8855主要特性, 應用電路/方框圖, 汽車無線電系統框圖以及NCV8855評估板電路圖與材料清單. The NCV8855 is a multiple output controller / regulator IC with an integrated high−side load switch. The NCV8855 addresses automotive radio system and instrument cluster power supply requirements. In addition to the high−side load switch, the NCV8855 includes a switch−mode power supply (SMPS) buck controller, a 2.5 A SMPS buck regulator and two low dropout (LDO) linear regulator controllers. The NCV8855 in combination with the ultra−low quiescent current NCV861x IC forms an eight−output automotive radio or instrument cluster power solution. The NCV8855 has an internally set switching frequency of 170 kHz, with a SYNC pin for external frequency synchronization. The NCV8855 is intended to supply power to various loads, such as a tuner, CD logic, audio processor and CD / tape control within a car radio. The high−side switch can be used for a CD / tape mechanism or switching an electrically−powered antenna or display unit. In an instrument cluster application, the NCV8855 can be used to power graphics display, flash memory and CAN transceivers. In addition, the high−side switch can be used to limit power to a TFT display during a battery over−voltage condition. NCV8855主要特性: • < 1 uA Shutdown Current • Meets ES−XW7T−1A278−AB Test Pulse G – Loaded Conditions • VIN Operating Range 9.0 to 18.0 V • 1 SMPS Controller with Adjustable Current Limit • 1 SMPS Regulator with Internal 300 m NMOS Switch • 2 LDO Controllers with Current Limit and Short Circuit Protection • 1 High−side Load Switch with Internal 300 m NMOS FET • Adjustable Output Voltage for All Controllers / Regulators • 800 mV, +/-1% Reference Voltage • System Enable Pin • Single Enable Pin for Both LDO Controllers • Independent Enable for High−side Load Switch • Thermal Shutdown with Thermal Warning Indicator • This is a Pb−Free Device NCV8855應用: • Automotive Radio • Instrument Cluster, Driver Information System (DIS) 
圖1. NCV8855應用電路/方框圖
圖2. NCV8855和NCV8612汽車無線電系統框圖 NCV8855評估板
圖3.評估板NCV8855BMNR2GEV外形圖
圖4.評估板NCV8855BMNR2GEV電路圖 評估板NCV8855BMNR2GEV材料清單:
詳情請見: 
EVBUM2120-D[1].pdf
(731.53 KB)
NCV8855BMNR2GEVB_SCHEMATIC[1].pdf
(294.76 KB)
來源：網絡 |
