IRLR8726 Datasheet, PDF (7/11 Pages) Kersemi Electronic Co., Ltd. – High Frequency Synchronous Buck Converters for Computer Processor Power

IRLR/U8726PBF
D.U.T
+
Driver Gate Drive
P.W.
Period
D=
P.W.
Period
+
‚
-

R_G
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
Re-Applied
** ^{+ Voltage}
Body Diode Forward Drop
• I_SD controlled by Duty Factor "D"
-
• D.U.T. - Device Under Test
Inductor Curent
Ripple ≤ 5%
* Use P-Channel Driver for P-Channel Measurements
** Reverse Polarity for P-Channel
*** V_GS = 5V for Logic Level Devices
V^*_G^*_S^*=10V
V_DD
I_SD
Fig 14. Diode Reverse Recovery Test Circuit for HEXFET^® Power MOSFETs
L
DUT
0
210K
S
Fig 15. Gate Charge Test Circuit
Id
Vgs
VCC
Vds
Vgs(th)
Qgodr
Qgd Qgs2 Qgs1
Fig 16. Gate Charge Waveform
2014-8-16
7
www.kersemi.com