Toshiba Electronic Devices & Storage Corporation launches TCKE9 series of eight compact, high-voltage electronic fuses (eFuse ICs). The new series supports multiple functions to protect power supply lines.
Shipments of the first two products TCKE903NL and TCKE905ANA have started.
The TCKE9 Series products have a current limit and voltage clamp function to protect the lines in power supply circuits against overcurrent and overvoltage conditions, something that standard physical fuses cannot do. Even in the event of abnormal overcurrent or overvoltage, the specified current and voltage are maintained.
TCKE9 series can be used in PCs, servers, SSDs, gaming consoles, augmented reality and virtual reality equipment and more to protect power supply circuits.
It features a maximum input voltage of 25.0 V and a low on-resistance of 34mΩ. It supports an output current of up to 4.0A and includes four types of input overvoltage clamp functions. With an overcurrent limit accuracy of -17% to +14% (at -40 to 125°C, RILIM=487Ω) and a rapid output-short reaction time of 2μs, this device ensures both safety and efficiency. It also features a FLAG function and comes in a compact WSON8 package measuring 2.0×2.0mm with a maximum thickness of 0.8mm.
The new products also feature over-temperature and short-circuit protection. This protects a circuit by immediately shutting off the eFuse IC when abnormal heat is generated in the circuit or an unexpected short-circuit occurs. A further eFuse IC advantage is the elimination of complex circuit designs and a reduced component count, realizing much simpler circuit designs with fewer components and a smaller area than is possible with a protection function secured with discrete parts.
Toshiba intends to obtain IEC 62368-1 certification, the international safety standard for high-level safety, for the eFuse ICs, which will also simplify certification tests customers’ devices are required to undergo.
The product lineup offers eight products: four, 3.3V, 5V, 12V, 20V, are suitable for overvoltage protection of a range of power supply voltages, and each has two types – an auto-retry type, where the eFuse IC automatically recovers the circuit itself, and a latch type, where recovery is triggered by an external signal. Customers can select the appropriate product for their requirements and the size of their equipment.
