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What is MCP73831?
MCP73831 is a highly advanced linear charge management controller for use in space-limited, cost-sensitive applications. This IC employs a constant current/constant voltage charge algorithm with selectable preconditioning and charges termination.
What is linear charger?
Linear Chargers. One way to minimize the size and complexity of the charger is to use a linear charger. The linear charger uses a pass transistor (typically a MOSFET, but sometimes a bipolar transistor) to drop the AC adapter voltage down to the battery voltage.
What are battery chargers made of?
Chargers work by passing an electric current into the battery cells, forcing those lithium ions to transform. Since the 1980s, most battery chargers have been made from silicon components. Silicon transistors are extremely cheap to produce and conduct electricity much better than previously used materials.
What is float charging mode?
Float mode is where the voltage on the battery is maintained at approximately 2.25 volts per cell, or 13.5 volts for a 12V battery. This voltage will maintain the full charge condition in the battery without boiling our electrolyte or overcharging the battery.
What are the features of a mcp73831 Charger?
Let’s discuss the features of MCP73831 Li-Ion/Li-Po Charger 4.2V, 500mA. Its features are as follows: Linear Charge Management Controller: 02. High Accuracy Preset Voltage Regulation: + 0.75% 03. Four Voltage Regulation Options: 4.20V, 4.35V, 4.40V, 4.50V 04. Programmable Charge Current: 15 mA to 500 mA 05.
What is the stat output on the mcp73831?
Charge Status Output (STAT) STAT is output for connection to an LED for charge status indication. Alternatively, a pull-up resistor can be applied for interfacing to a host microcontroller. STAT is a tri-state logic output on the MCP73831 and an open-drain output on the MCP73832.
How does the Adafruit LiPoly USB charger work?
Charging is performed in three stages: first a preconditioning charge, then a constant-current fast charge and finally a constant-voltage trickle charge to keep the battery topped-up. The charge current is 100mA by default, so it will work with any size battery and USB port.
Is there a LiPo battery charger from Microchip?
The little board was built to charge a single lipo battery using the MCP73831 from Microchip. I plan to use it along with several other boards featured on this blog in a larger project, but I like to break things up and make sure they’re working individually before making them work together.