DC2821A 演示電路是一款采用 LT8302 的緊湊型無光電隔離
反激式轉換器。 DC2821A 輸出 12V,并在 5mA 至 1.4A 的
負載電流以及 4V 至 28V 的輸入電壓范圍內保持 ±1%(典型值)調節(jié)。輸出電流能力隨著輸入電壓的增加而增加。電源開關關閉后,
變壓器漏感會導致初級側出現(xiàn)電壓尖峰。為了將漏感尖峰限制在 65V MOSFET
額定電壓范圍內,安裝了 RC
緩沖器和 TVS 鉗位來抑制振鈴并將 MOSFET 漏極電壓鉗位到安全水平
說明
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DC2821A, Demonstration Circuit is a compact no-opto isolated flyback converter featuring the LT8302. The DC2821A outputs 12V, and maintains ±1% (typ) regulation with a load current from 5mA up to 1.4A and over an input voltage from 4V to 28V. The output current capability increases with the input voltage. Transformer leakage inductance causes a voltage spike on the primary side after the power switch turns off. To limit this leakage inductance spike within the MOSFET voltage rating of 65V, an RC snubber and a TVS clamp are installed to damp the ringing and clamp the MOSFET drain voltage to a safe level
主要特色
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Conversion Type
DC to DC
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Input Voltage
4 to 28 V
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Output Voltage
12 V
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Output Current
1.4 A
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Efficiency
89.9 %
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Topology
Flyback