Part Number Search

Cross Reference Search

About information presented in this cross reference

The information presented in this cross reference is based on TOSHIBA's selection criteria and should be treated as a suggestion only. Please carefully review the latest versions of all relevant information on the TOSHIBA products, including without limitation data sheets and validate all operating parameters of the TOSHIBA products to ensure that the suggested TOSHIBA products are truly compatible with your design and application.
Please note that this cross reference is based on TOSHIBA's estimate of compatibility with other manufacturers' products, based on other manufacturers' published data, at the time the data was collected.
TOSHIBA is not responsible for any incorrect or incomplete information. Information is subject to change at any time without notice.

Keyword Search

Parametric Search

Stock Check & Purchase

Select Product Categories

How does overcurrent protection of eFuse IC (electronic fuses) work?

There are two types of protection operation methods for overcurrent protection of our eFuse IC.
Please select according to the system requirements. The figure below shows an operation example of the TCKE8 series. Please check each the data sheets for details.

  • Auto-retry type
    Limits the current that flows through eFuse IC to the inside MOSFET by ILIM  when the current exceeds the over-current limit ILIM.
    At this time, eFuse IC occurs power loss PD= ( VIN  - VOUT ) × ILIM and the junction temperature rises, thus moves to thermal shutdown operation and turns off MOSFET. 
    After MOSFET turns off,  junction temperature become lowers, then MOSFET turns on again. If the overcurrent condition is not resolved, ILIM limits the current and then performs the thermal shutdown operation again.

  • Latch type
    Like the auto-retry type, after limiting the current flowing through MOSFET when an overcurrent occurs with the current determined by ILIM, eFuse IC moves to thermal shutdown and turns off MOSFET.
    the latch type keeps MOSFET off.
    To release the latch state, after the overcurrent state is resolved, set the voltage of the EN / UVLO pin to the “L” level and then set it to the “H” level again.
Occurring the overcurrent / short circuit
A new window will open