MM3474K02VBE

Overview

The MM3474K02VBE is a monolithic integrated circuit designed for battery protection, manufactured by Mitsumi Electric. It serves as an overcharge, overdischarge, and overcurrent protection IC specifically for lithium-ion and lithium-polymer rechargeable secondary batteries. The device detects conditions such as cell overcharge, over-discharge, discharge overcurrent, and short circuits within a 3 to 5-cell configuration. It is housed in a TSSOP-20 package with a plastic/epoxy body, featuring gull-wing terminals and a dual position layout. The component operates within an industrial temperature range of -40 °C to 85 °C and has a maximum supply current of 0.02 mA.

Feature Summary

• Monolithic integration of overcharge, overdischarge, and overcurrent protection functions
• Detection capability for short circuits and abnormal current states
• Designed for multi-cell lithium-ion and lithium-polymer battery packs

Applications

• Protection circuits for 3 to 5-cell lithium-ion battery packs
• Safety monitoring for lithium-polymer rechargeable secondary batteries
• Overcurrent and short-circuit detection in portable electronic devices

Procurement Notes

Verify the specific suffix 'K02VBE' against official Mitsumi documentation to confirm exact tape-and-reel specifications or marking codes, as generic datasheets may list base part numbers without suffix details. Ensure the supplier provides traceability to the original manufacturer's production records. Confirm that the received components match the TSSOP-20 physical dimensions and terminal pitch specified in the official mechanical drawings. Request material compliance certificates if required for your assembly process.

Selection Notes

Select this component when designing protection systems for 3 to 5-series lithium-ion or lithium-polymer battery configurations. It is suitable for applications requiring integrated detection of overcharge, overdischarge, and overcurrent conditions within a single IC. Consider the TSSOP-20 package size and industrial temperature range (-40 °C to 85 °C) for environmental compatibility. This IC is appropriate for portable electronics where space efficiency and comprehensive battery safety monitoring are critical design constraints.

Part Context

The MM3474 series represents a family of battery protection ICs from Mitsumi Electric, tailored for multi-cell lithium-based battery management. While other series like MM3645 target single-cell applications, the MM3474 variant specifically addresses 3 to 5-cell architectures. This places it within the power supply support circuit category, distinct from simple linear regulators or DC-DC converters found in the same manufacturer's portfolio. It complements broader battery management strategies by providing dedicated hardware-level fault detection.

Replacement Considerations

Publicly confirmed substitute part numbers for the MM3474K02VBE are not available in the provided reference data. When seeking alternatives, verify functional equivalence regarding cell count support (3-5 cells), protection thresholds, and package compatibility (TSSOP-20). Cross-reference with other Mitsumi models like the MM3684 or third-party lithium protection ICs only after confirming detailed parameter alignment through official manufacturer datasheets.