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TDE1890 Datasheet(PDF) 8 Page - STMicroelectronics

No. de pieza TDE1890
Descripción Electrónicos  2A HIGH-SIDE DRIVER INDUSTRIAL INTELLIGENT POWER SWITCH
Download  12 Pages
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Fabricante Electrónico  STMICROELECTRONICS [STMicroelectronics]
Página de inicio  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

TDE1890 Datasheet(HTML) 8 Page - STMicroelectronics

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- All electrical parameters of the device, con-
cerning the calculation, are at maximum val-
ues.
- Thermal shutdown threshold is at minimum
value.
Therefore:
Vs = 30V, RDSON0 = 0.23
Ω,Iq = 8mA, Ios = 4mA
@Vos = 2.5V,
ΘLim = 135°C
Rthj-amb =35
°C/W
It follows:
Ioutx = 2.5A, RDSONx = 0.386
Ω,Pq = 240mW,
Pos = 110mW
From equation 4 we can see that, without any
heatsink, it is not possible to operate in the ON
steady state at the maximum current value. A
derating curve for this case is reported in fig. 7.
Using an external heatsink, in order to obtain a to-
tal Rth of 15
°C/W, we obtain the derating curve
reported in fig. 8.
0
20406080
100
120
0.0
0.5
1.0
1.5
2.0
2.5
D93IN033
Io
(A)
Tamb (°C)
Figure 7: Max. Output Current vs. Ambient
Temperature (Multiwatt without
heatsink, Rth j-amb =35
°C/W)
0
20
40
60
80
100
120
0.0
0.5
1.0
1.5
2.0
2.5
D93IN020A
Io
(A)
Tamb (°C)
Figure 8: Max. Output Current vs. Ambient
Temperature (Multiwatt with heatsink,
Rth j-amb =15
°C/W)
+
-
+IN
-IN
D1
D2
CONTROL
LOGIC
Ios
LOAD
OUTPUT
OUTPUT STATUS
GND
µP POLLING
+Vs
DC BUS 24V +/-25%
D93IN014
Figure 6: Application Circuit
TDE1890 - TDE1891
8/12


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