DC1961A 演示板在隔離式無
光耦合器反激式轉換器中使用 LT8309 次級同步
驅動器。它可調節 36V 至 72V 輸入源的 12V、5A 輸出。輸出調節在初級側由 LT3748 處理,LT3748 是一種邊界導通模式反激式控制器,直接從初級感測輸出電壓,從而形成一個不帶光耦合器的簡單反激原理圖。 LT8309
同步整流器驅動器通過感測同步 MOSFET 漏極至源極電壓來確定其導通周期,從而復制
二極管的行為
說明
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DC1961A, Demonstration Board using LT8309 secondary synchronous driver in an isolated, no optocoupler, flyback converter. It regulates a 12V, 5A output from a 36V to 72V input source. Output regulation is handled on the primary side by the LT3748, a boundary conduction mode flyback controller which senses output voltage directly from the primary, resulting in a simple flyback schematic with no Optocoupler. The LT8309 synchronous rectifier driver replicates the behavior of a diode by sensing the synchronous MOSFET drain-to-source voltage to determine its turn on period
主要特色
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Conversion Type
DC to DC
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Input Voltage
36 to 72 V
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Output Voltage
11.4 to 12.6 V
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Output Current
5 A
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Efficiency
91.5 %
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Topology
Flyback