PMP9474, Fly-Buck Bias Solution for MCU and RS-485
Progetto di riferimento usando la parte LM5017MR di Texas Instruments
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- PMP9474, Fly-Buck Bias Solution for MCU and RS-485. The PMP9474 reference design is Fly-Buck solution, with two outputs, one non-isolated power supply, 3.3V@300mA, for MCU, one isolated power supply, 5V@100mA, for RS-485. The most important feature of this design is ultra compact solution size, which is only 26mmx14.5mm. The design uses the LM5017 synchronous buck converter configured as a Fly-Buck regulator. With the benefit of primary side regulation, the supply has the output regulated without the Optocoupler or additional transformer winding. The LM5017 has a wide Vin range which is up to 100V and 600mA output current capability with integrated switch FETs. The input voltage to the reference board can be loosely regulated with a range of 18V to 36V
Funzioni principali
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Conversion TypeDC to DC
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Input Voltage18 to 36 V
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Output Voltage3.3|5 V
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Output Current0.1@5V|0.3@3.3V A
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Efficiency83 %
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TopologyBuck