On Semi NCV8855多输出电源控制解决方案
发布时间：2012-7-30 11:14
发布者：1770309616
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On Semi公司的NCV8855是集成了高边负载开关的多输出电源控制器/稳压器,能满足汽车无线系统和仪表盘电源的要求. NCV8855还集成了开关电源(SMPS)降压控制器,2.5A SMPS降压稳压器和两个低压降(LDO)线性稳压器控制器,和超低静态电流的NCV861x一起能组成8输出的无线系统或仪表盘电源解决方案.器件满足ES−XW7T−1A278−AB测试脉冲G负载条件,VIN工作电压9.0V-18.0V.本文介绍了NCV8855主要特性, 应用电路/方框图, 汽车无线电系统框图以及NCV8855评估板电路图与材料清单. 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应用: • Automotive Radio • Instrument Cluster, Driver Information System (DIS) 
图1. NCV8855应用电路/方框图 
图2. NCV8855和NCV8612汽车无线电系统框图 NCV8855评估板 
图3.评估板NCV8855BMNR2GEV外形图 
图4.评估板NCV8855BMNR2GEV电路图 评估板NCV8855BMNR2GEV材料清单: 
详情请见: 
EVBUM2120-D[1].pdf
(731.53 KB)
NCV8855BMNR2GEVB_SCHEMATIC[1].pdf
(294.76 KB)
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