Description

TP4056 buffer power supply – Mini USB 1A charger

Mini USB charger TP4056 with a maximum power of 1A for lithium-ion batteries.

• It has functions to work as a buffer power supply. This circuit will come in handy when building additional power sources (such as a power bank).
• It has security, which prevents the charging voltage from exceeding 4.2V, and also protects against over-discharge – 2.5V (under load). This is important because Li-Ion, Li-Pol batteries during overcharging, as well as excessive discharge may get damaged.
• The principle of operation is very simple: given a 5V INPUT power supply, the module charges the battery pack, and also this voltage appears at the output of the OUT+ and OUT- terminals. When this power supply is disconnected, the module gives power from the battery, so that the powered receiver will receive current all the time.
• A useful device especially when using alternative energy sources such as photovoltaic panels or wind turbines.

TP4056 Technical Data:

• Power supply 4.5-5.5V (built-in Mini USB socket to power the chip) or connectors to solder 4.5- 5.5V power supply marked +-
• Voltage on B+ and B- terminals is max 4.2V – one cell (1S)
• Charge voltage 4.2V +/- 1.5%
• Discharge threshold voltage: 2,5V +/- 1,5%
• Maximum current 1A – adjustable (R3)
• LED charging indication red
• Charge indication LED blue
• Dimensions 19x25x10mm
• Protection against overcharging and also over-discharge
• B+, B- terminals are used to connect Li-Ion – Li-Pol cell
• OUT +, – terminals are used to connect a device powered by the cell

Product features

Possibility to adjust the battery charging current using the resistor marked R3 on the board. This will adjust the charging current to suit our battery cell.