X3100V28T1

Overview

The Intersil X3100V28T1 is a protection and monitor IC designed for battery packs consisting of four series Lithium-Ion cells. It provides internal over-charge, over-discharge, and overcurrent protection circuitry, along with an internal EEPROM memory, voltage regulator, and drive circuitry for external FETs controlling cell charge, discharge, and balancing. Protection thresholds are software-selectable via a 3MHz SPI interface, while detection delays vary using external capacitors. An internal analog multiplexer allows monitoring of cell voltage and current by a separate microcontroller. The device features a selectable current sense amplifier with gains of 10, 25, 80, and 160 to enhance resolution with external A/D converters.

Feature Summary

• Software-selectable protection levels and variable detection times via SPI interface
• Integrated FET drive circuitry for external cell control
• Internal analog multiplexer for cell voltage and current monitoring
• 4k-bit EEPROM with IDLock technology for secure data partitioning

Applications

• Battery pack protection for 4-series Lithium-Ion configurations
• Cell balancing systems controlled by external microcontrollers
• Gas gauge implementations requiring high-resolution current sensing

Procurement Notes

Verify the specific suffix V28T1 against official Intersil documentation to confirm package type and tape-and-reel specifications. Ensure compatibility with the required 3MHz SPI interface speed and external capacitor values for delay settings. Confirm that the 28 Ld TSSOP package aligns with your PCB layout constraints.

Selection Notes

Select this component for applications requiring precise, software-configurable protection thresholds for 4-cell Li-ion batteries. Consider the integrated current sense amplifier gains if system design benefits from simplified external ADC requirements. Verify that the host microcontroller can support the necessary SPI communication and gas gauge algorithms.

Part Context

The X3100 series complements Intersil's portfolio of battery management solutions. While the X3101 targets 3-cell applications, the X3100 is specifically engineered for 4-series configurations. Both devices share similar architectures but differ in cell count support, allowing designers to choose based on specific battery pack topology requirements.

Replacement Considerations

Publicly confirmed substitute part numbers for the X3100V28T1 are not available in the provided reference material. Designers should consult official Intersil resources or authorized distributors for qualified alternatives.