MBRM140_06 Datasheet, PDF (3/5 Pages) ON Semiconductor – Surface Mount Schottky Power Rectifier

MBRM140
10E−3
1.0E−3
T_J = 85°C
100E−3
10E−3
T_J = 85°C
100E−6
10E−6
T_J = 25°C
1.0E−3
100E−6
T_J = 25°C
1.0E−6
0
10
20
30
V_R, REVERSE VOLTAGE (VOLTS)
Figure 3. Typical Reverse Current
10E−6
40
0
10
20
30
40
V_R, REVERSE VOLTAGE (VOLTS)
Figure 4. Maximum Reverse Current
1.8
dc
1.6
FREQ = 20 kHz
1.4
1.2
SQUARE WAVE
1.0
0.8
0.6
0.4
0.2
0
25 35
I_pk/I_o = p
I_pk/I_o = 5
I_pk/I_o = 10
I_pk/I_o = 20
45 55 65 75 85 95 105 115 125
T_L, LEAD TEMPERATURE (°C)
Figure 5. Current Derating
1.0
0.9
0.8
0.7
I_pk/I_o = p _SQUARE
I_pk/I_o = 10 ^{Ipk/Io = 5}
WAVE
dc
0.6 ^Ipk^/Io ^{= 20}
0.5
0.4
0.3
0.2
0.1
0
0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6
I_O, AVERAGE FORWARD CURRENT (AMPS)
Figure 6. Forward Power Dissipation
1000
125
115
T_J = 25°C
105
100
R_tja = 33.72°C/W
95
51°C/W
69°C/W
85
83.53°C/W
96°C/W
10
0
5.0 10 15 20 25 30 35 40
V_R, REVERSE VOLTAGE (VOLTS)
Figure 7. Capacitance
75
0 5.0 10 15 20 25 30 35 40
V_R, DC REVERSE VOLTAGE (VOLTS)
Figure 8. Typical Operating Temperature Derating*
* Reverse power dissipation and the possibility of thermal runaway must be considered when operating this device under any re-
verse voltage conditions. Calculations of T_J therefore must include forward and reverse power effects. The allowable operating
T_J may be calculated from the equation: T_J = T_Jmax − r(t)(Pf + Pr) where
r(t) = thermal impedance under given conditions,
Pf = forward power dissipation, and
Pr = reverse power dissipation
This graph displays the derated allowable T_J due to reverse bias under DC conditions only and is calculated as T_J = T_Jmax − r(t)Pr,
where r(t) = Rthja. For other power applications further calculations must be performed.
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