Power Multiplexer Circuit Using Common-Drain MOSFET

This power multiplexer circuit with 2 inputs and 1 output is realized on a small board. A new power multiplexer circuit usign common-drain MOSFET has been added to the already developed power multiplexer circuit reference design. These reference circuits allow switching between BBM and MBB modes by combining optimal devices such as MOSFET gate driver ICs and zener diodes from our diverse product lineup.

PCB photo example of Power multiplexer circuit
PCB photo example
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Features

  • 2 × 2 cm small board mounted, 2 input 1 output power multiplexer circuit
  • Uses common-drain MOSFET (SSM10N961L)
  • Switches between 20 V and 9 V inputs, and output current is 3 A (Max.)
  • Supports switching of various power supply systems such as USB power delivery, fast charging, and wireless power supply
  • MBB (Make-Before-Break), BBM (Break-Before-Make) operation switchable

Description

Circuit Dual input and single output power source multiplexer circuit
Input VINA/ Input VINB 9 V/20 V
Output current (Max.) 3 A
MBB Wave form example of Power multiplexer circuit (MUX6)
MBB Wave form example

Design Documents

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Design Data

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Used Toshiba Items

Part Number Device Category Portion Usage Description
Zener diode Module board 12 V Zener Diode, SOD-323HE(US2H)
Zener diode Module board 24 V Zener Diode, SOD-323HE(US2H)
Small-signal Schottky barrier diode Module board 30 V/0.1 A Schottky Barrier Diode, SOD-962(SL2)
Small-signal MOSFET Module board N-ch MOSFET, 30 V, 0.1 A, 3.6 Ω@4V, CST3C
Small-signal MOSFET Module board N-ch MOSFET, 60 V, 0.15 A, 3.9 Ω@10V, CST3C
Power MOSFET (N-ch dual) Module board N-ch x 2 Common-drain MOSFET, 30 V, 14.0 A, 9.9 mΩ@10 V, TCSPAG-341501
Comparator (CMOS) Module board Single Comparator (CMOS), 5.5 V, +/-2.75 V, MP6C
L-MOS SHS series (TC74LCX-equivalent) Module board One-Gate Logic(L-MOS), Inverter, SOT-765(US8)
Load switch IC Module board 2.7 to 28 V External MOSFET Driver IC, WCSP6G
Load switch IC Module board 2.7 to 28 V External MOSFET Driver IC, WCSP6G
Low Dropout (LDO) Linear Voltage Regulator Module board High voltage, Low quiescent current, Fast load transient CMOS Linear Regulator
Power MOSFET (N-ch single 30V<VDSS≤60V) Base board N-ch MOSFET, 40 V, 0.00085 Ω@10V, SOP Advance(N), U-MOSⅨ-H
Load switch IC Base board 2.7 to 28 V External MOSFET Driver IC, WCSP6E
L-MOS SHS series (TC74LCX-equivalent) Base board One-Gate Logic(L-MOS), Schmitt Buffer, SOT-363(US6)
74HC CMOS logic IC series Base board Dual Monostable Multivibrator, SOIC16
Point regulator (single output) Base board 200 mA Fixed Output LDO Regulator, 4.8 V, SOT-25(SMV)
Bias resistor built-in transistor (BRT) Base board NPN Bias Resistor Built-in Transistors (BRT), 47 kΩ/47 kΩ, SOT-723(VESM)
Bias resistor built-in transistor (BRT) Base board PNP Bias Resistor Built-in Transistors (BRT), 10 kΩ/10 kΩ, SOT-723(VESM)
Switching diode Base board 80 V/0.1 A Switching diode, SOD-523(ESC)

Related Documents

We provide materials useful for designing and considering similar circuits, such as application notes for installed products. Please click on each tab to view the contents.

Related Reference Design

Power multiplexer circuit

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