Compact eFuse ICs for high-voltage power management applications

Toshiba Electronics Europe GmbH has released two new products to its eFuse IC offering. The TCKE903NL and TCKE905ANA products are reusable, thereby decreasing maintenance costs and recovery time for equipment repairs and supporting various functions to protect power supply line circuits.

The new eFuses are ideal for a wide range of power management applications due to their low switch ON resistance of 34mOhm (typ.), high output current of up to 4A, and wide input voltage operation characteristics. The products are excellent for electronic slew rate control and power supply line circuit protection in industrial applications such as servers, professional kitchen equipment, etc.

This series of 25V high input voltage eFuse ICs offers two types of product: an auto-retry type that allows the eFuse IC to recover the circuit itself automatically and a latch type that is recovered by an external signal. Two different clamping voltage levels, 3.8V and 5.7V, are offered.

The series' current limit and voltage clamp functions protect the circuit against overcurrent and overvoltage conditions, which is impossible with conventional physical fuses. The specified current and voltage can be maintained even if abnormal overcurrent or overvoltage is applied. Also, the new products offer over-temperature and short-circuit protection features to protect the circuit by immediately shutting off when abnormal heat is generated in the circuit or an unexpected short-circuit condition occurs.

Another advantage is that eFuse ICs eradicate complex circuit design and many components, realising much simpler circuit designs with fewer components and a smaller area than a protection function secured with discrete parts. As the company intends to obtain IEC 62368-1 certification, the international safety standard for ICT and AV equipment, the eFuse ICs will also simplify and accelerate certification testing process of the end equipment.

The series is offered in a thin, compact WSON8 package measuring 2mm×2mm (typ.), t=0.8mm (max).