基于LT4180設(shè)計的精密負(fù)載調(diào)整電源方案
[導(dǎo)讀]LT4180是全特性電源控制器,集成有5mA光隔離器,欠壓/過壓鎖住,軟起動和±1%內(nèi)部基準(zhǔn)電壓. LT4180的虛擬遙測特性包括用戶編程的抖動頻率和擴展頻譜抖動.輸入電壓從3.1V到50V,主要用在12V高強亮度燈,28V工業(yè)系統(tǒng),大于40
LT4180是全特性電源控制器,集成有5mA光隔離器,欠壓/過壓鎖住,軟起動和±1%內(nèi)部基準(zhǔn)電壓. LT4180的虛擬遙測特性包括用戶編程的抖動頻率和擴展頻譜抖動.輸入電壓從3.1V到50V,主要用在12V高強亮度燈,28V工業(yè)系統(tǒng),大于40W的CAT5電纜系統(tǒng),AC和DC適配器,井下采集和其它遙控儀表等.本文介紹了LT4180主要特性,方框圖以及典型應(yīng)用電路,包括12V/500mA線性穩(wěn)壓器電路圖, 12V/600mA升壓穩(wěn)壓器電路圖和3.3V隔離反激穩(wěn)壓器電路圖.
The LT4180 solves the problem of providing tight load regulation over long, highly resistive cables without requiring an additional pair of remote sense wires. This Virtual Remote Sense™ device continuously interrogates the line impedance and corrects the power supply output voltage via its feedback loop to maintain a steady voltage at the load regardless of current changes.
The LT4180 is a full-featured controller with 5mA optoisolator sink capability, under/overvoltage lockout, soft-start and a ±1% internal voltage reference. The Virtual Remote Sense feature set includes user-programmable dither frequency and optional spread spectrum dither.
The LT4180 works with any topology and type of isolated or nonisolated power supply, including DC/DC converters and adjustable linear regulators.
The LT4180 is available in a 24-pin, SSOP package.
LT4180主要特性:
Tight Load Regulation with Highly Resistive Cables without Requiring Remote Sense Wiring
Compatible with Isolated and Nonisolated Power Supplies
±1% Internal Voltage Reference
5mA Sink Current Capability
Soft-Correct Reduces Turn-On Transients
Undervoltage and Overvoltage Protection
Pin-Programmable Dither Frequency
Optional Spread Spectrum Dither
Wide VIN Range: 3.1V to 50V
24-Pin SSOP Package
LT4180應(yīng)用:
12V High Intensity Lamps
28V Industrial Systems
High Power (>40 Watts) CAT5 Cable Systems
Wiring Drop Cancellation for Notebook Computer Battery Charging
AC and DC Adaptors
Well-Logging and Other Remote Instrumentation
Surveillance Equipment
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圖1.LT4180方框圖
圖2.LT4180隔離電源框圖
圖3.LT4180 12V/500mA線性穩(wěn)壓器電路圖
圖4.LT4180 12V/600mA升壓穩(wěn)壓器電路圖
圖5.LT4180 3.3V隔離反激穩(wěn)壓器電路圖
The LT4180 solves the problem of providing tight load regulation over long, highly resistive cables without requiring an additional pair of remote sense wires. This Virtual Remote Sense™ device continuously interrogates the line impedance and corrects the power supply output voltage via its feedback loop to maintain a steady voltage at the load regardless of current changes.
The LT4180 is a full-featured controller with 5mA optoisolator sink capability, under/overvoltage lockout, soft-start and a ±1% internal voltage reference. The Virtual Remote Sense feature set includes user-programmable dither frequency and optional spread spectrum dither.
The LT4180 works with any topology and type of isolated or nonisolated power supply, including DC/DC converters and adjustable linear regulators.
The LT4180 is available in a 24-pin, SSOP package.
LT4180主要特性:
Tight Load Regulation with Highly Resistive Cables without Requiring Remote Sense Wiring
Compatible with Isolated and Nonisolated Power Supplies
±1% Internal Voltage Reference
5mA Sink Current Capability
Soft-Correct Reduces Turn-On Transients
Undervoltage and Overvoltage Protection
Pin-Programmable Dither Frequency
Optional Spread Spectrum Dither
Wide VIN Range: 3.1V to 50V
24-Pin SSOP Package
LT4180應(yīng)用:
12V High Intensity Lamps
28V Industrial Systems
High Power (>40 Watts) CAT5 Cable Systems
Wiring Drop Cancellation for Notebook Computer Battery Charging
AC and DC Adaptors
Well-Logging and Other Remote Instrumentation
Surveillance Equipment
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圖1.LT4180方框圖
圖2.LT4180隔離電源框圖
圖3.LT4180 12V/500mA線性穩(wěn)壓器電路圖
圖4.LT4180 12V/600mA升壓穩(wěn)壓器電路圖
圖5.LT4180 3.3V隔離反激穩(wěn)壓器電路圖
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