TDE1897R ST Microelectronics, TDE1897R Datasheet - Page 7

• Manufacturer Part Number: TDE1897R
• Description: 0.5A HIGH-SIDE DRIVER INDUSTRIAL INTELLIGENT POWER SWITCH
• Manufacturer: ST Microelectronics

Therefore:
V
V
R
70 C/W (SIP9)
It follows:
I
P
Figure 5: Application Circuit.
outx
s
os
os
thj-amb
- No heat sink nor air circulation (R
- All electrical parameters of the device, con-
- Thermal shutdown threshold is at minimum
= 30V, R
(625mA instead of 500mA).
cerning the calculation, are at maximum val-
ues.
value.
R
= 2.5V, Lim = 135 C
= 110mW
= 0.625mA, R
thj-amb
= 100 C/W (Minidip); 90 C/W (SO20);
).
DSON0
P POLLING
= 0.6 , I
DSONx
DC BUS 24V +/-25%
= 1.006 , P
q
D93IN014
= 6mA, I
+IN
-IN
D1
D2
q
os
th
= 180mW,
= 4mA @
equal to
+
-
GND
From equation 4, we can find:
T
Therefore, the IPS TDE1897/1898, although
guaranteed to operate up to 85 C ambient tem-
perature, if used in the worst conditions, can meet
some limitations.
SIP9 package, which has the lowest R
work at maximum operative current over the en-
tire ambient temperature range in the worst condi-
tions too. For other packages, it is necessary to
consider some reductions.
With the aid of equation 3, we can draw a derat-
ing curve giving the maximum current allowable
versus ambient temperature. The diagrams, com-
puted using parameter values above given, are
depicted in figg. 6 to 8.
If an increase of the operating area is needed,
heat dissipation must be improved (R
e.g. by means of air cooling.
ambx
CONTROL
LOGIC
= 66.7 C (Minidip);
73.5 C (SO20);
87.2 C (SIP9).
OUTPUT STATUS
Ios
+Vs
TDE1897R - TDE1898R
OUTPUT
LOAD
th
thj-amb
reduced)
, can
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