eFuse Application Circuit (with Enhanced Overcurrent Protection)

This reference design provides design guide, data and other contents of eFuse IC Application Circuit (with Enhanced Overcurrent Protection) built on a small board.
This circuit provides precise overcurrent shutdown by combining the eFuse IC and the ThermoflaggerTM used as an overcurrent detection device.

This is a picture of eFuse Application Circuit (with Enhanced Overcurrent Protection).
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Features

  • Provides precise overcurrent shutdown solution in addition to various eFuse IC protection functions
  • Built on a small 2 x 2cm board

Description

Input Power Supply Voltage DC 2.7V to 6V
Rated Output Current 1.4A (Typ.), up to 4A with appropriate resistor setting

Design Documents

Materials for designers, such as an overview of circuit operation and explanations of design considerations. Please click on each tab to view the contents.

Design Data

Provides circuit data that can be loaded into EDA tools, PCB layout data, and data used in PCB manufacturing. Available in formats from multiple tool vendors. You can freely edit it with your preferred tool.

*1:Actual PCB was designed on CR5000BD. The other files were made from CR5000BD file.

*2:The data was generated on CR5000BD.

Used Toshiba Items

Part Number Device Category Portion Usage Description
eFuse IC Module Board・1 2.7 to 23 V/4.0 A eFuse IC, 34 mΩ, WSON8
Over Temperature Detection IC Module Board・1 10 μA, Open-drain, Over temperature detection IC
Small-signal MOSFET Module Board・1 N-ch MOSFET, 20 V, 0.18 A, 3.0 Ω@4V, SOT-723(VESM)
Small-signal MOSFET Module Board・1 P-ch MOSFET, -20 V, -0.25 A, 1.4 Ω@4.5V, SOT-723(VESM)
L-MOS VHS series Module Board・1 One-Gate Logic(L-MOS), Non-Inverter Buffer, SOT-353(USV)
Zener diode Module Board・2 6.8 V Zener Diode, SOD-523(ESC)
Power MOSFET (N-ch single 30V<VDSS≤60V) Base Board・4 N-ch MOSFET, 40 V, 0.00085 Ω@10V, SOP Advance(N), U-MOSⅨ-H
Load switch IC Base Board・4 2.7 to 28 V External MOSFET Driver IC, WCSP6E
L-MOS SHS series (TC74LCX-equivalent) Base Board・4 One-Gate Logic(L-MOS), Schmitt Buffer, SOT-363(US6)
74HC CMOS logic IC series Base Board・2 Dual Monostable Multivibrator, SOIC16
Point regulator (single output) Base Board・1 200 mA Fixed Output LDO Regulator, 4.8 V, SOT-25(SMV)
Bias resistor built-in transistor (BRT) Base Board・1 NPN Bias Resistor Built-in Transistors (BRT), 10 kΩ/10 kΩ, SOT-723(VESM)
Bias resistor built-in transistor (BRT) Base Board・4 PNP Bias Resistor Built-in Transistors (BRT), 10 kΩ/10 kΩ, SOT-723(VESM)
Switching diode Base Board・2 80 V/0.1 A Switching diode, SOD-523(ESC)

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