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IRFR7440PBF Datasheet(PDF) 8 Page - International Rectifier

Part # IRFR7440PBF
Description  Brushed Motor drive applications
Download  12 Pages
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Manufacturer  IRF [International Rectifier]
Direct Link  http://www.irf.com
Logo IRF - International Rectifier

IRFR7440PBF Datasheet(HTML) 8 Page - International Rectifier

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IRFR7440PbF/IRFU7440PbF
8
www.irf.com © 2015 International Rectifier
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January 6, 2015
Fig 24a. Switching Time Test Circuit
Fig 24b. Switching Time Waveforms
Fig 23b. Unclamped Inductive Waveforms
Fig 23a. Unclamped Inductive Test Circuit
tp
V(BR)DSS
IAS
RG
IAS
0.01
Ω
tp
D.U.T
L
VDS
+
- VDD
DRIVER
A
15V
20V
VGS
Fig 25a. Gate Charge Test Circuit
Fig 25b. Gate Charge Waveform
Vds
Vgs
Id
Vgs(th)
Qgs1 Qgs2
Qgd
Qgodr
Fig 22.
Peak Diode Recovery dv/dt Test Circuit for N-Channel
HEXFET® Power MOSFETs
Circuit Layout Considerations
• Low Stray Inductance
• Ground Plane
• Low Leakage Inductance
Current Transformer
P.W.
Period
di/dt
Diode Recovery
dv/dt
Ripple
≤ 5%
Body Diode
Forward Drop
Re-Applied
Voltage
Reverse
Recovery
Current
Body Diode Forward
Current
VGS=10V
VDD
ISD
Driver Gate Drive
D.U.T. ISD Waveform
D.U.T. VDS Waveform
Inductor Curent
D =
P.W.
Period
* VGS = 5V for Logic Level Devices
*
+
-
+
+
+
-
-
-
ƒ
„
‚
RG
VDD
• dv/dt controlled by RG
• Driver same type as D.U.T.
• ISD controlled by Duty Factor "D"
• D.U.T. - Device Under Test
D.U.T

Inductor Current
D.U.T.
VDS
ID
IG
3mA
VGS
.3
μF
50K
Ω
.2
μF
12V
Current Regulator
Same Type as D.U.T.
Current Sampling Resistors
+
-
VDS
90%
10%
VGS
td(on)
tr
td(off) tf
VDS
Pulse Width ≤ 1 µs
Duty Factor ≤ 0.1 %
RD
VGS
RG
D.U.T.
10V
+
- VDD
VGS


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