Skip to main content
added 122 characters in body
Source Link
Russell McMahon
  • 152.1k
  • 18
  • 218
  • 403

There are protected MOSFETs under various marketing names available (e.g. omnifet, hitfet, intellifet, etc). These devices include clamping diodes and overcurrent/temperature protection. They also seem to suggest that inductive loads can be connected directly:

Infineon-BSP78: 
Datasheet

Imgur

AND8202:

ClampFET topologies utilize ESD protection at the gate input and active gate to drain clamping (described later), useful when switching inductive loads. [...] All topologies drive any type of resistive or inductive load such as solenoids, heater coils, and filament bulbs limited only by the current and thermal capability of the device

Usually flyback diodes are used directly across the inductive load (and not the MOSFET) to prevent voltage spikes if the transistor is turned off. Thanks to the overvoltage protection diodes the MOSFET should be safe, but other parts may not.

Should I use these protected MOSFETs without a flyback diode and what pitfalls may occur?

There are protected MOSFETs under various marketing names available (e.g. omnifet, hitfet, intellifet, etc). These devices include clamping diodes and overcurrent/temperature protection. They also seem to suggest that inductive loads can be connected directly:

Infineon-BSP78: Imgur

AND8202:

ClampFET topologies utilize ESD protection at the gate input and active gate to drain clamping (described later), useful when switching inductive loads. [...] All topologies drive any type of resistive or inductive load such as solenoids, heater coils, and filament bulbs limited only by the current and thermal capability of the device

Usually flyback diodes are used directly across the inductive load (and not the MOSFET) to prevent voltage spikes if the transistor is turned off. Thanks to the overvoltage protection diodes the MOSFET should be safe, but other parts may not.

Should I use these protected MOSFETs without a flyback diode and what pitfalls may occur?

There are protected MOSFETs under various marketing names available (e.g. omnifet, hitfet, intellifet, etc). These devices include clamping diodes and overcurrent/temperature protection. They also seem to suggest that inductive loads can be connected directly:

Infineon-BSP78: 
Datasheet

Imgur

AND8202:

ClampFET topologies utilize ESD protection at the gate input and active gate to drain clamping (described later), useful when switching inductive loads. [...] All topologies drive any type of resistive or inductive load such as solenoids, heater coils, and filament bulbs limited only by the current and thermal capability of the device

Usually flyback diodes are used directly across the inductive load (and not the MOSFET) to prevent voltage spikes if the transistor is turned off. Thanks to the overvoltage protection diodes the MOSFET should be safe, but other parts may not.

Should I use these protected MOSFETs without a flyback diode and what pitfalls may occur?

added 466 characters in body
Source Link
someonr
  • 315
  • 1
  • 4
  • 16

There are protected MOSFETs under various marketing names available (e.g. omnifet, hitfet, intellifet, etc). These devices include clamping diodes and overcurrent/temperature protection. They also seem to suggest that inductive loads can be connected directly:

Infineon-BSP78: Imgur

AND8202:

ClampFET topologies utilize ESD protection at the gate input and active gate to drain clamping (described later), useful when switching inductive loads. [...] All topologies drive any type of resistive or inductive load such as solenoids, heater coils, and filament bulbs limited only by the current and thermal capability of the device

Usually flyback diodes are used directly across the inductive load (and not the MOSFET) to prevent voltage spikes if the transistor is turned off. Thanks to the overvoltage protection diodes the MOSFET should be safe, but other parts may not.

Should I use these protected MOSFETs without a flyback diode and what pitfalls may occur?

There are protected MOSFETs under various marketing names available (e.g. omnifet, hitfet, intellifet, etc). These devices include clamping diodes and overcurrent/temperature protection. They also seem to suggest that inductive loads can be connected directly:

Imgur

Usually flyback diodes are used directly across the inductive load (and not the MOSFET) to prevent voltage spikes if the transistor is turned off. Thanks to the overvoltage protection diodes the MOSFET should be safe, but other parts may not.

Should I use these protected MOSFETs without a flyback diode and what pitfalls may occur?

There are protected MOSFETs under various marketing names available (e.g. omnifet, hitfet, intellifet, etc). These devices include clamping diodes and overcurrent/temperature protection. They also seem to suggest that inductive loads can be connected directly:

Infineon-BSP78: Imgur

AND8202:

ClampFET topologies utilize ESD protection at the gate input and active gate to drain clamping (described later), useful when switching inductive loads. [...] All topologies drive any type of resistive or inductive load such as solenoids, heater coils, and filament bulbs limited only by the current and thermal capability of the device

Usually flyback diodes are used directly across the inductive load (and not the MOSFET) to prevent voltage spikes if the transistor is turned off. Thanks to the overvoltage protection diodes the MOSFET should be safe, but other parts may not.

Should I use these protected MOSFETs without a flyback diode and what pitfalls may occur?

Source Link
someonr
  • 315
  • 1
  • 4
  • 16

Do Protected Power MOSFETs need a flyback diodes?

There are protected MOSFETs under various marketing names available (e.g. omnifet, hitfet, intellifet, etc). These devices include clamping diodes and overcurrent/temperature protection. They also seem to suggest that inductive loads can be connected directly:

Imgur

Usually flyback diodes are used directly across the inductive load (and not the MOSFET) to prevent voltage spikes if the transistor is turned off. Thanks to the overvoltage protection diodes the MOSFET should be safe, but other parts may not.

Should I use these protected MOSFETs without a flyback diode and what pitfalls may occur?