eFuse protects 48-V power lines
Toshiba’s TCKE1401NM 75-V, 6-A eFuse provides 48-V power-line protection for industrial and consumer equipment, including servers and power tools. In addition to short-circuit, overcurrent, and overvoltage protection, it integrates reverse current blocking, input reverse polarity protection, and thermal shutdown in a 4×4-mm VQFN24D package.
The TCKE1401NM operates from a 4.7-V to 75-V input, with an 80-V absolute maximum input voltage. Its high-voltage tolerance makes it suitable for power-line protection in 24-V, 48-V, and 54-V systems. The eFuse has a maximum output current of 6 A and integrates a MOSFET with a typical on-resistance of 44.5 mΩ, helping to reduce power loss during operation.
Operating thresholds for overcurrent limiting (0.82 A to 6.43 A typical), undervoltage lockout, and overvoltage protection are set with external resistors. Slew-rate control is adjustable with an external capacitor to reduce inrush current. Overcurrent fault response is selectable via a mode pin for either auto-retry or latch-off operation. Reverse current blocking and reverse polarity protection are provided using an external MOSFET.
Toshiba says it has now begun shipments of the TCKE1401NM eFuse.
Toshiba Electronic Devices & Storage
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