Comparison of eFuse IC performance with conventional fuses

Only the eFuse IC cuts off the current path at high speed and does not allow a large current to flow.

Results of short circuit protection operation

 

eFuse IC

(TCKE812NL)

Polyfuse

Chip fuse

Rated current

3 A (Setting)

3.1 A (Rated)

3 A (Rated)

Interruption time

2 μs

2.9 S

7 μs

Protective operation review

Results of short circuit protection operation

Results of short circuit protection operation

Results of short circuit protection operation

It was confirmed that a large current of 70A or more flowed momentarily in the poly fuse and chip fuse, and the chip fuse was broken.

The figure above shows the result of comparing the short circuit protection performance between the eFuse IC and the conventional fuse (poly fuse, chip fuse).

We were checking how long the output current  turned off when the output is short-circuited to GND.
(For comparison, the overcurrent settings of the eFuse IC, poly fuses, and chip fuse ratings were unified around 3A.)

As a result, the off time of the eFuse IC on the left side was about 2 μs, while that of the poly fuse in the middle figure was about 3 seconds, and that of the chip fuse in the right figure was about 7 μs.

The peak current was also suppressed to about 35A by the eFuse IC.
On the other hand, conventional fuses did not fit in the measurement range, and a large current of 70A or more flowed.

eFuse IC基礎知識

What is the semi-conductor fuse eFuse IC?
詳細資料
Advantages of Semiconductor-fuse eFuse IC (1)
詳細資料
Advantages of Semiconductor-fuse eFuse IC (2)
詳細資料
Advantages of Semiconductor-fuse eFuse IC (3)
詳細資料
Examples of applications where semiconductor fuses (eFuse ICs) are used
詳細資料
Overcurrent protection function (OCP)
詳細資料
Short circuit protection function
詳細資料
Overvoltage protection function (overvoltage clamp)
詳細資料
Slew rate control (Suppressing rush current)
詳細資料

Related information

Back to Basics of eFuse ICs

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