Microchip Technology Inc, a provider of microcontroller and analogue semiconductors, has released MCP73811 and MCP73812 (MCP7381X) Li-Ion/Li-Polymer charge-management controllers. The MCP73811 and MCP73812 (MCP7381X) Li-Ion/Li-Polymer charge-management controllers are single-cell devices that provide fully integrated charge-management functions, and selectable or programmable charge currents up to 500 mA in a 5-pin SOT-23 package.
The MCP73811 and MCP73812 (MCP7381X) Li-Ion/Li-Polymer charge-management controllers are USB compatible and come with integrated current sense, pass transistor and reverse battery protection onboard to enable smaller and more cost-effective designs.
As they conform to USB output-power specifications, the MCP7381X charge-management controllers can be powered via the USB ports on PCs. This eliminates the need for an external power adapter, and saves end users the trouble of finding an electrical outlet to charge their portable device. Additionally, the MCP7381X charge-management controllers feature on-chip thermal regulation, which decreases charge current if the temperature rises above safe levels. The remaining feature set of the family is minimised, in order to provide a cost-effective charging solution.
According to Microchip, as an increasing number of applications are beginning to utilise Li-Ion and Li-Polymer batteries, small, low-cost battery-charging solutions are needed. The MCP7381X chargers support this demand and provide the features necessary for a complete, yet cost-effective, charging solution.
Both MCP7381X devices are ideal for consumer electronic devices, such as rechargeable toys, and low-cost MP3 players.
Other key features
With their charge-enabled input, the MCP7381X charge-management controllers provide a simple interface for designers to use. The MCP73811 has a digital input and selectable USB charge currents of either 100 mA or 500 mA, meaning it provides charge currents without intervention from external components. The MCP73812 offers a user-programmable charge current via an external resistor, enabling designers to optimise charge currents for their particular application.