MCP73832T-2DCI/MC

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The MCP73832T-2DCI/MC is a highly reliable and efficient stand-alone battery charger available in a small SOT-23 package optimized for space-efficient circuit board design. This small size makes it suitable for a wide range of applications, including portable electronics, industrial, medical and automotive. The MCP73832T-2DCI/MC supports a wide range of charging current levels, making it ideal for use in applications that require flexibility in charging cycle durations and current levels. Its high efficiency of up to 97%, along with its wide operating temperature range, make it an excellent choice for many different applications.

The MCP73832T-2DCI/MC design features a compact, stand-alone system for charging 1S to 4S Li-Ion and Li-Polymer cells. The device operates from either USB 5V input or other regulated power sources from 4.1V – 6.3V. LED indicators are included to meet the need for a visual charge status. The MCP73832T-2DCI/MC supports 4 common charging profiles including Constant Voltage, Constant Current, CV/CC and Taper and can be programmed with a wide range of charging parameters to suit different applications.

The MCP73832T-2DCI/MC can also be used as an adjustable low-dropout linear regulator (LDO). It employs an internal low-side N-MOSFET capable of supplying up to 500 mA. The LDO output voltage is adjustable from 1V to 4.1V, providing additional design flexibility.

The MCP73832T-2DCI/MC functionality is implemented by an asynchronous buck-boost switching regulator controlled by a sophisticated charge-detection circuit. The charging profiles are set by external resistors and the compiled program in the microcontroller. The charge-detection circuit monitors the charge/discharge current, input voltage, and cell temperature to provide protection from overcharge, overdischarge, and thermal overloads. The microcontroller provides intelligent features including: Under voltage lockout for the input supply and facility for low-battery warning. The on-board NTC thermistor allows for monitoring of cell temperature during charging.

To use the MCP73832T-2DCI/MC, connectors must be connected to the +VIN, –VIN, BAT and STAT pin, respectively, to detect the cell voltage. The charge current and charge voltage can then be adjusted with selecting the external resistor value. When threshold voltage is reached, the MCP73832T-2DCI/MC will activate the charge cycle and the LED on the STAT pin will indicate that the charging is in progress. When the charging has completed, LED will turn off and programmed charge parameters reset for next charging cycle. This device is capable of charging up to 4S packs of Li-Ion or Li-Polymer batteries when using an external Battery Management System (BMS).

In summary, the MCP73832T-2DCI/MC is an ideal solution for battery charging applications that require a reliable, space-efficient and highly configurable circuit in a single package. The device provides wide input voltage operation and its integrated safety features help ensure user safety and provide protection against overcharge and over-discharge. The MCP73832T-2DCI/MC is well suited for use in any portable device, medical equipment, or automotive application requiring a safe and efficient battery charging system.

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