The electrical characteristics shown by the MOSFET will give us a wide understanding that MOSFET is a power component, series and parallel MOSFET connections may enable different electrical characteristics.

In this post, we explain MOSFET in series and parallel, which include possible advantages and disadvantages shown by both networks at a circuit.

MOSFET in series

MOSFET in series
MOSFET in series

The figure shows the MOSFET in the series model network, the connection is made by connecting the same gate resistor for each MOSFET and also MOSFET must be identical to each other.

Most of the time series MOSFET network is made by connecting MOSFETs back to back that is, connect the source terminal of the first MOSFET into the second MOSFET drain terminal and go on.

A single low voltage input signal acts in the first MOSFET, which will turn ON all the other MOSFET in that connection and devices to turn ON by charge injection through.

MOSFET in series high voltage

The main reason to make the series connection with MOSFET is that it has a high voltage rating.

But the series MOSFET network has a problem which is its unequal voltage sharing between devices, the transient and steady-state operation which can damage all the devices in series.

The series MOSFET connection had high power handling capability and when we connect the MOSFET in series, their channel length gets doubled but the width will remain unchanged.

Parallel MOSFET circuit

Parallel MOSFET circuit
Parallel MOSFET circuit
  • When we connect the MOSFETs in parallel we need to consider the MOSFET used and gate resistor, because need to keep everything identical to each other.
  • The purpose of a parallel MOSFET network is that they need to handle high current and share the load, this may possible when all the MOSFETs are the same.
  • The gate resistor has to keep at the same resistance value because we need to keep the triggering time of each MOSFET the same.
  • The parallel MOSFET network evenly divides loads to each device, this will reduce the amount of heat generated at the whole circuit.

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