Microchip Technology introduced the MCP731XX and MCP732XX families of charge-management controllers. The new chargers feature Overvoltage Protection (OVP), which prevents overheating and damage to the battery-charger circuit from input-voltage spikes. The MCP73113, MCP73114, and MCP73213 Lithium-Ion (Li-Ion); and MCP73123, MCP73223 Lithium Iron Phosphate (LiFePO4) Chargers feature high-accuracy voltage regulation and an integrated pass transistor. The MCP731XX and MCP732XX chargers are all available in 10-pin, 3 mm x 3 mm DFN packages. The MCP73113, MCP73114 and MCP73123 devices are priced at $0.80 each, in 10,000-unit quantities. The MCP73213 and MCP73223 are priced at $1.28 each, in 10,000-unit quantities.
The Microchip MCP731XX and MCP732XX chargers have a maximum input voltage of 18V and come with one of two OVP set points — 5.8V and 6.5V for the single-cell MCP73114 and MCP73113/23 chargers; or 13V for the dual-cell MCP73213 and MCP73123 chargers. In addition, the MCP73113, MCP73114 and MCP73213 devices offer a variety of charging-voltage options for Li-Ion batteries — 4.1 to 4.4V for the single-cell and 8.2 to 8.8V for the dual-cell devices. The MCP73123 and MCP73223 devices target LiFePO4 batteries, and offer charging-voltage options of 3.6 and 7.2V, respectively.
The MCP73113 and MCP73114 Li-Ion, and MCP73123 LiFePO4 single-cell chargers feature high-accuracy voltage regulation of 0.5%; the dual-cell MCP73213 Li-Ion and MCP73223 LiFePO4 devices 0.6%. These highly accurate levels of regulation enable longer battery life per charge, ultimately allowing portable products to run for longer periods of time between charges. In addition, all of the chargers feature an integrated pass transistor, which eliminates the need for an external FET, and reduces overall design cost, size and complexity.
The Microchip MCP731XX and MCP732XX chargers are ideal for devices in the consumer (e.g. GPS units, portable media players, phone chargers, toys, photo and video cameras, Bluetooth headsets), medical (e.g. portable glucose meters, blood-pressure and heart-rate monitors), and industrial markets (e.g. point-of-sale terminals, handheld barcode scanners and other portable devices).
More information: Microchip Technology Battery Management Design Center