OnSemiNCV8855多輸出電源控制解決方案

作者：時(shí)間：2012-07-30 來(lái)源：網(wǎng)絡(luò)

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On Semi公司的NCV8855是集成了高邊負(fù)載開(kāi)關(guān)的多輸出電源控制器/穩(wěn)壓器,能滿(mǎn)足汽車(chē)無(wú)線系統(tǒng)和儀表盤(pán)電源的要求. NCV8855還集成了開(kāi)關(guān)電源(SMPS)降壓控制器,2.5A SMPS降壓穩(wěn)壓器和兩個(gè)低壓降(LDO)線性穩(wěn)壓器控制器,和超低靜態(tài)電流的NCV861x一起能組成8輸出的無(wú)線系統(tǒng)或儀表盤(pán)電源解決方案.器件滿(mǎn)足ES?XW7T?1A278?AB測(cè)試脈沖G負(fù)載條件,VIN工作電壓9.0V-18.0V.本文介紹了NCV8855主要特性, 應(yīng)用電路/方框圖, 汽車(chē)無(wú)線電系統(tǒng)框圖以及NCV8855評(píng)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(yīng)用:

? Automotive Radio

? Instrument Cluster, Driver Information System (DIS)