ADI公司的LT8228是100V雙向電壓或電流同步調(diào)節(jié)器,具有反向電源,反向電流和故障保護功能,–60V 輸入和輸出負(fù)壓保護,雙向浪涌電流限制和升壓輸出短路保護以及開關(guān) MOSFET 短路檢測和保護,高達 100V 的寬輸入和輸出電壓范圍和10V 柵極驅(qū)動,具有廣泛的自檢,診斷和故障報告功能,可編程的固定或可同步開關(guān)頻率從80kHz 至 600kHz,可編程軟啟動和動態(tài)電流限制.在整個溫度范圍內(nèi)反饋電壓容差為 ±1.0%.主要用在工業(yè),汽車,醫(yī)療,軍事和航空電子設(shè)備應(yīng)用中需要 N+1?冗余或其他保護的高可靠性系統(tǒng).中電網(wǎng)為您整理如下詳細資料,本文介紹了LTR8228主要特性,框圖,以及多種應(yīng)用電路,以及演示板DC2351A主要特性,電路圖,材料清單和PCB設(shè)計圖.

The LTR8228 is a 100V bidirectional constant-current orconstant-voltage synchronous buck or boost controllerwith independent compensation network. The direction ofthe power flow is automatically determined by the LT8228or externally controlled. The input and output protectionMOSFETs protect against negative voltages, controlinrush currents and provide isolation between terminalsunder fault conditions such as switching MOSFET shorts.

In buck mode, the protection MOSFETs at the V1 terminalprevents reverse current. In boost mode, the sameMOSFETs regulate the output inrush current and protectsitself with an adjustable timer circuit breaker.

The LT8228 offers bidirectional input and output currentlimit as well as independent current monitoring.Masterless, fault tolerant current sharing allows anyLT8228 in parallel to be added or subtracted while maintainingcurrent sharing accuracy. Internal and externalfault diagnostics and reporting are available via the FAULTand REPORT pins. The LT8228 is available in a 38-leadTSSOP package.

LTR8228主要特性:

?Bidirectional Voltage or Current Regulation
?Bidirectional Reverse Current Protection
?Input and Output Negative Voltage Protection to –60V
?Bidirectional Inrush Current Limit and Boost OutputShort Protection
?Switching MOSFET Short Detection and Protection
?10V Gate Drive
?Wide Input and Output Voltage Range Up to 100V
?Feedback Voltage Tolerance: ±1.0% Over Temperature
?Bidirectional Programmable Current Regulation andMonitoring
?Extensive Self-Test, Diagnostics and Fault Reporting
?Programmable Fixed or Synchronizable SwitchingFrequency: 80kHz to 600kHz
?Programmable Soft-Start and Dynamic Current Limit
?Masterless, Fault Tolerant Current Sharing

LTR8228應(yīng)用:

?Dual Battery Automotive and Industrial Systems
?High Power System Backup and Supply Stabilization
?“N+1” Redundant, High Reliability Power Supplies
?Power Interrupt Protection System

圖1.LTR8228框圖

圖2.LTR8228簡化雙向電池備份系統(tǒng)框圖

圖3.LTR8228應(yīng)用電路圖(1)

圖4.LTR8228應(yīng)用電路圖(2)

圖5.LTR8228應(yīng)用電路圖(3)

演示板DC2351A

Demonstration circuit 2351A is a high voltage, high efficiencysynchronous buck or boost DC/DC converter. It isdesigned to have 36V to 56V on one side and 8V to 14Von the other side. It can supply a 35A maximum outputcurrent in buck mode and delivers 7A of current in boostmode. The demo board features the LT8228EFE controller.

This part can seamlessly transition from bucking toboosting. With built-in circuit breaker function and otherprotection features, the LT8228 is ideal for high reliabilitysystems requiring N+1 redundancy or other protectionsin industrial, automotive, medical, military, and avionicsapplications.

The DC2351A is designed to be paralleled with otherDC2351A boards to increase the total output current.With adequate heatsinking or airflow, the output currentcan be increased.

圖6.演示板DC2351A外形圖

圖7.演示板DC2351A電路圖
演示板DC2351A材料清單:

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圖8.演示板DC2351A PCB設(shè)計圖(1)

圖9.演示板DC2351A PCB設(shè)計圖(2)

圖10.演示板DC2351A PCB設(shè)計圖(3)

圖11.演示板DC2351A PCB設(shè)計圖(4)

圖12.演示板DC2351A PCB設(shè)計圖(5)
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圖13.演示板DC2351A PCB設(shè)計圖(6)

圖14.演示板DC2351A PCB設(shè)計圖(7)

圖15.演示板DC2351A PCB設(shè)計圖(8)

圖16.演示板DC2351A PCB設(shè)計圖(9)
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