7.Application and recommended usage of small high power thin film ship resistors

7.1 Gate resistor

・Where IGBT is used in motor driving circuits or inverter circuits, gate resistor is used to suppress surge voltage as shown below.

・Rapid turn on/off fast switching IGBT and SiC FET require small high power resistors.

An example of gate resistor

An example of gate resistor
Surge voltage control by gate resistor when IGBT is turned off

Gate resistor
suppresses surge
voltage

Gate resistor
buffers the change
of corrector current

Surge voltage control by gate resistor when
IGBT is turned off

・Application example:Motor driving circuits, Inverter circuits where IGBT and SiC FET are used.
・Recommended products: PRG series(long side terminal)HRG series(short side terminal)

7.2 Snubber circuits

・Power supply circuits, or inverter circuits where high speed switching such as IGBT is needed, snubber circuit below is added to absorb surge voltage due to switching.

・With miniaturization of the units, small but high power resistors are needed for snubber circuits.

image


RC snubber circuit

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RCD snubber circuit

Examples of snubber circuits

Absorption of surge voltage by snubber circuit

Absorption of surge voltage by snubber circuit

・Application:Motor driving circuits, Inverters, Power supply circuits, IGBT related circuits
・Recommended products:PRG series(long side terminal)HRG series(short side terminal)

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