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1.8V 2A Portable Power Supply Li-Ion USB Charging - 1V82AR5

author: jckz82
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2 layer board of 1.44 x 1.44 inches (36.5 x 36.5 mm)
Uploaded: May 08, 2017
Shared: May 08, 2017
Total Price: $10.30

I designed this power supply for small projects, prototyping, Arduino, IoT, and wireless embedded applications. An ATtiny45 provides the ideal balance between features and efficiency. When on, efficiencies go as high as 92%. When off, it only consumes 2μA! It uses two LEDs, red and green, to provide simple information about the charging and power of the device.

This power supply has protection for input overcurrent, output short circuit, output disconnect, battery disconnect, battery overvoltage, and battery undervoltage.

It’s difficult to find a power supply to convert a Lithium-Ion battery to a 1.8V output with high current output, high efficiency, and safety features. This board uses the Texas Instruments TPS63020, which is capable of this task.

This power supply uses a single cell Lithium-Ion battery. The battery is charged at a maximum of 500mA using the Microchip MCP73831. A battery is required to use this power supply.

Specs 1.8VDC output 4A peak output (100ms max) 2A continuous output 90%+ efficiency 2μA sleep current Micro USB charge input Micro JST Connector for Single Cell Li-Ion 500mA max charge rate Minimum recommended battery capacity - 500mAh

I designed this power supply for small projects, prototyping, Arduino, IoT, and wireless embedded applications. An ATtiny45 provides the ideal balance between features and efficiency. When on, efficiencies go as high as 92%. When off, it only consumes 2μA! It uses two LEDs, red and green, to provide simple information about the charging and power of the device.

This power supply has protection for input overcurrent, output short circuit, output disconnect, battery disconnect, battery overvoltage, and battery undervoltage.

It’s difficult to find a power supply to convert a Lithium-Ion battery to a 1.8V output with high current output, high efficiency, and safety features. This board uses the Texas Instruments TPS63020, which is capable of this task.

This power supply uses a single cell Lithium-Ion battery. The battery is charged at a maximum of 500mA using the Microchip MCP73831. A battery is required to use this power supply.

Specs 1.8VDC output 4A peak output (100ms max) 2A continuous output 90%+ efficiency 2μA sleep current Micro USB charge input Micro JST Connector for Single Cell Li-Ion 500mA max charge rate Minimum recommended battery capacity - 500mAh

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      Since this is a project designed by a community member, it may contain design errors that prevent it from working as intended. OSH Park cannot place any guarantees about the functionality or correctness of the design.
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