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Example of Temperature Gradient Change by External Temperature Sensor (Ther-
mistor)
S1F76640 has a temperature gradient selection circuit inside the stabilization circuit, and three kinds of tempera-
ture gradients, –0.20%/˚C, –0.40%/˚C and –0.60%/˚C, can be selected as the V
gradients are necessary, a thermistor is connected in series to the resistor R
in Figure 8.8, and temperature gradients can be changed to any values.
Figure 8.8 Example of Temperature Gradient Change
(Pins other than the above Pins 1, 2 and 6 are connected as per Figure 5.2. For Pins 3 and 4, smaller temperature
gradients than those to be changed are selected from Table 4.1 and are set.)
Note 1 :
Relations among the thermistor, RT and V
R
+ R
RV
V
=
REG
R
1
When a thermistor is used for RT, it can make the temperature gradient of V
Note 2 :
The thermistor temperature characteristics are non-linear but can be corrected to linear ones when the
resistor RP is connected to the thermistor in parallel.
S1F70000 Series
Technical Manual
V
REG
R
T
R
P
R
1
R
RV
REG
T
· V
RV
EPSON
output. When other temperature
REG
for output voltage regulation as shown
RV
1
16
RV
15
2
V
REG
3
14
13
4
5
12
6
11
V
SS
7
10
8
9
are expressed as follows:
S1F76640 Series
larger..
REG
2–61
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