IRLML2803
Q G
V DS
R D
- V DD
10V
V G
Q GS
Q GD
V GS
R G
10V
D.U.T.
+
Charge
Fig 9a. Basic Gate Charge Waveform
Pulse Width ≤ 1 μs
Duty Factor ≤ 0.1 %
Fig 10a. Switching Time Test Circuit
Current Regulator
Same Type as D.U.T.
V DS
50K Ω
90%
12V
.2 μ F
.3 μ F
- DS
V GS
D.U.T.
+
V
10%
V GS
3mA
t d(on)
t r
t d(off)
t f
I G
I D
Current Sampling Resistors
Fig 9b. Gate Charge Test Circuit
1000
Fig 10b. Switching Time Waveforms
100
10
D = 0.50
0.20
0.10
0.05
0.02
0.01
P DM
1
SINGLE PULSE
(THERMAL RESPONSE)
t 1
t 2
Notes:
1. Duty factor D = t 1 / t 2
0.1
0.00001
0.0001
0.001
0.01
0.1
2. Peak T J = P DM x Z thJA + T A
1               10
100
t 1 , Rectangular Pulse Duration (sec)
Fig 11. Maximum Effective Transient Thermal Impedance, Junction-to-Ambient
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