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30V~10A Auto Step-Up/Step-Down DC-DC Converter Module – HandsOn Tech
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20A (Single Voltage) or 10A (Dual Voltages): A DC/DC Voltage Regulator Module from Linear Technology - News
10A DC DC 4 32V to 1.2 32V Step Down Module Solar Charger Constant Voltage Current Adjustable Buck Converter LED Driver|buck converter|driver ledconstant current - AliExpress