IRF8721PBF-1_15 Datasheet, PDF (7/9 Pages) International Rectifier – Industry-standard pinout SO-8 Package

IRF8721PbF-1
Current Regulator
Same Type as D.U.T.
50KΩ
12V
.2μF
.3μF
+
D.U.T. -V^DS
V_GS
3mA
I_G
I_D
Current Sampling Resistors
Fig 16a. Gate Charge Test Circuit
Id
Vgs
Vds
Vgs(th)
Qgodr
Qgd Qgs2 Qgs1
Fig 16b. Gate Charge Waveform
+
‚
-

R_G
D.U.T
+
Driver Gate Drive
P.W.
Period
D=
P.W.
Period
ƒ
Circuit Layout Considerations
• Low Stray Inductance
• Ground Plane
-
• Low Leakage Inductance
Current Transformer
-^„ +
D.U.T. I_SD Waveform
Reverse
Recovery
Current
Body Diode Forward
Current
di/dt
D.U.T. V_DS Waveform _{Diode Recovery}
dv/dt
• dv/dt controlled by R_G
• Driver same type as D.U.T.
V_DD
+
• I_SD controlled by Duty Factor "D"
-
• D.U.T. - Device Under Test
Re-Applied
Voltage
Body Diode
Inductor Curent
Forward Drop
Ripple ≤ 5%
* V_GS = 5V for Logic Level Devices
* V_GS=10V
V_DD
I_SD
Fig 17. Peak Diode Recovery dv/dt Test Circuit for N-Channel
HEXFET^® Power MOSFETs
7
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October 02, 2013