MCP73842T-820I/UN

Overview

The MCP73842T-820I/UN is a charge management controller designed for lithium-ion and lithium polymer batteries. It supports single or dual cell configurations with an output voltage of 8.241 V and a maximum output current of 10 mA. The device operates within a supply voltage range of 8.7 V to 12 V. It features integrated charging safety timers and temperature monitoring capabilities. The component is housed in a 10-pin MSOP package and is rated for industrial temperatures from -40°C to +85°C.

Feature Summary

• Integrated charging safety timer to prevent overcharging conditions
• Temperature monitoring functionality for enhanced battery safety
• Supports both single and dual cell lithium-ion/polymer battery architectures

Applications

• Portable electronic devices requiring dual-cell lithium battery power
• Medical equipment utilizing protected lithium-ion power sources
• Industrial handheld instruments with strict charging safety requirements

Procurement Notes

Verify the specific suffix '820' corresponds to the required 8.241 V output voltage for dual-cell applications. Confirm the 'I' designation indicates the industrial temperature range suitable for your operational environment. Ensure the MSOP-10 package dimensions align with your PCB layout constraints before finalizing procurement.

Selection Notes

Select this component when dual-cell lithium battery charging is required with low current demands around 10 mA. The integrated safety timer and temperature monitoring make it suitable for applications where regulatory compliance or high reliability is critical. Compare against the MCP73842T-840I/UN if a standard 8.4 V output is acceptable instead of the precise 8.241 V threshold.

Part Context

This part belongs to the MCP7384x series of charge management controllers from Microchip Technology. The series provides solutions for single and dual cell lithium batteries with various output voltages and packages. The MCP73842 variant specifically offers enhanced safety features compared to basic chargers, integrating monitoring functions directly into the control logic.

Replacement Considerations

The MCP73842T-840I/UN serves as a direct functional substitute if the 8.4 V output voltage meets system requirements. Verify that the pinout and thermal characteristics remain compatible during substitution.