Toshiba introduces six eFuse ICs

Providing safety for low voltage applications, the TCKE8xx series is the first range of eFuse IC products developed by Toshiba Electronics Europe. The six devices in the range support various protection functions for power supply lines.

Conventional fuses physically break the electrical link to the circuit they protect but eFuses additionally provide protection features that a typical fuse cannot. This includes an accurate over-current limit, over-voltage protection and over-temperature protection in addition to short-circuit protection. Compared to polymeric positive temperature co-efficient (PPTC) devices that are also resettable, they react significantly faster, can be reset directly via an external logic signal, and retain their low on-resistance even after multiple trip events, observes Toshiba.

The TCKE8xx series has three categories: no over-voltage protection, 5V (VOVC = 6.04V), and 12V (VOVC = 15.1V). Each over-voltage category is offered in auto-retry or latched options as the response after a fault event. The status of the latch type is recovered by the application of an external signal, while the auto-retry is capable of re-enabling its output automatically.

The integrated fast-trip comparator can switch off the output typically within 150 nano seconds. An external capacitor can be included to reduce inrush current by setting a turn-on slew-rate at the output as required. Provision is also made to support an external N-channel MOSFET for reverse-current blocking protection. Typical applications include the supply lines to cameras, cordless cleaner and power tools, cleaning robots, server, smart speaker, thermostats and wireless chargers.

The WSON10B package is thin (0.75mm) and has dimensions of 3.0 x 3.0mm, Typical RON is just 28mOhm and an over-current limit accuracy is ±11 per cent. Input voltages of 4.4 to 18.0V are supported and output currents can lie at up to 5A. The TCKE8 series is certified to IEC 62368-1.

Toshiba Electronics Europe offers European consumers and businesses a variety of innovative hard disk drive (HDD) products plus semiconductor solutions for automotive, industrial, IoT, motion control, telecoms, networking, consumer and white goods applications. The company’s broad portfolio encompasses integrated wireless ICs, power semiconductors, microcontrollers, optical semiconductors, ASSPs and discrete devices ranging from diodes to logic ICs.  

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