AN4191 datasheet(5/20 Pages) STMICROELECTRONICS

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AN4191 Fiches technique(PDF) 5 Page - STMicroelectronics

No de pièce	AN4191

Description	This report shows the analysis performed on Power MOSFET devices

PDF	20 Pages

Scroll/Zoom	100%

Fabricant	STMICROELECTRONICS [STMicroelectronics]

Site Internet	http://www.st.com

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5 / 20 page

AN4191

Brief introduction to Power MOSFET intrinsic gate resistance

Doc ID 023815 Rev 1

5/20

Figure 2.

Internal parameters of the device

In order to better understand the impact of Rg on the device’s switching performance, two

different analyses are performed:

“Unclamped inductive switching” test on a characterization board; the device under test

is a 120 A / 40 V LL Vth device selected with different intrinsic Rg values.

Application analysis on a 2.5" HDD board, where “good” parts (with correct Rg value)

are compared with “bad” devices (with high Rg) in terms of switching behavior and

device temperature.

Cds

Cgd

Cgs

AM16409V1

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