MCP73832T-2ATI/MC

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MCP73832T-2ATI/MC is a two-cell lithium-ion (Li-ion) charger with built-in power-management circuit that provides high accuracy, low voltage, and automatic charge current control. It is typically used to charge two-cell Li-Ion or Li-Po batteries with a high current output capability and with a high efficiency internal charge pump.

Application Field

The MCP73832T-2ATI/MC provides two programmable steady state charge current settings that are adjustable from 150 mA to 2.1 A for each cell, making it suitable for applications where charging time needs to be closely controlled. The high output current capability of the MCP73832T-2ATI/MC allows it to charge the main battery from a supply voltage as low as 4.4 V, and it will protect the connected battery from over-voltage.

The MCP73832T-2ATI/MC can be used in applications where the load needs to be regulated, such as in cell phones, laptops, tablets, and wearable electronics. Additionally, the MCP73832T-2ATI/MC can be used in non-battery applications such as portable AC/DC power adapters, solar charger, and USB power adapters.

Working Principle

The MCP73832T-2ATI/MC features a current-limited on-battery charging circuit with two programmable charging current settings. A battery voltage feedback pin is provided, which allows accurate tracking of the battery voltage. A low battery input signal is provided to ensure the charger will not be activated if the battery voltage is too low. The MCP73832T-2ATI/MC requires no external power switching components, making it ideal for cost sensitive applications.

The MCP73832T-2ATI/MC is a constant-voltage, constant-current charger, which allows it to deliver a steady output current according to the charge current setting. As the battery approaches its full charge voltage, the output current is gradually reduced until it reaches the termination current setting. This allows the battery to achieve a full charge without overcharging, providing battery protection and extended battery life.

The MCP73832T-2ATI/MC uses a voltage-current reduction mechanism to ensure that the connected battery is not over-discharged or over-charged. Furthermore, the device features a charge status pin that provides an indication of when the battery is fully charged or when the connected battery is present.

The MCP73832T-2ATI/MC also features a temperature monitor and under-voltage lockout (UVLO) to ensure safe battery charging. The temperature monitor allows the device to reduce the charge current if it exceeds the programmed temperature limit. The UVLO prevents the device from operating if the battery voltage is too low, preventing the device from attempting to charge an empty battery.

In summary, the MCP73832T-2ATI/MC is an advanced two-cell Li-Ion charger capable of providing a high output current with a high accuracy internal charge pump. With its Programmable Charge Current settings, voltage feedback pin, temperature monitor, and UVLO, The MCP73832T-2ATI/MC provides a safe and reliable battery charger for Li-Ion and Li-Po batteries.

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