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S-812C31BPI-C4LTFU ๋ฐ์ดํ„ฐ์‹œํŠธ(HTML) 23 Page - ABLIC Inc.

๋ถ€ํ’ˆ๋ช… S-812C31BPI-C4LTFU
์ƒ์„ธ๋‚ด์šฉ  16 V INPUT, 75 mA VOLTAGE REGULATOR
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S-812C31BPI-C4LTFU ๋ฐ์ดํ„ฐ์‹œํŠธ(HTML) 23 Page - ABLIC Inc.

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16 V INPUT, 75 mA VOLTAGE REGULATOR
Rev.7.0_01
S-812C Series
23
2. Constant current circuit
This circuit can be used as a constant current circuit if making the composition seen in
Figure 20 and
21. Constant current IO is calculated from the following equation (VOUT(E) = actual output voltage):
IO = (VOUT(E) ๏‚ธ RL) + ISS
Note that by using a circuit in
Figure 20, it is impossible to set the better driving ability to the constant
amperage (IO) than the S-812C Series basically has.
To gain the driving ability which exceeds the S-812C Series, thereโ€™s a way to combine a constant
current circuit and a current boosting circuit, as seen in
Figure 21.
The maximum input voltage for a constant current circuit is 16 V + the voltage for device (VO).
It is not recommended to add a capacitor between the VIN pin (power supply) and the VSS pin or the
VOUT pin (output) and the VSS pin because the rush current flows at power-on.
GND
RL
VOUT
VIN
VIN
VOUT
VO
IO
CIN
ON/OFF
VSS
S-812C
Series
Device
Figure 20 Constant Current Circuit
IO
ON/OFF
R1
GND
RL
VOUT
VIN
VOUT
CIN
VSS
S-812C
Series
Tr1
VO
Device
VIN
Figure 21 Constant Current Boost Circuit
3. Output voltage adjustment circuit
(Only for S-812CxxA Series (Unavailable short-circuit protection and power-off function))
By using the composition seen in
Figure 22, users are able to increase the output voltage. The value of
output voltage VOUT1 is calculated from the following equation (VOUT(E) = actual output voltage):
VOUT1 = VOUT(E) ๏‚ด (R1 + R2) ๏‚ธ R1 + R2 ๏‚ด ISS
Set the value of resistors R1 and R2 so that the S-812C Series is not affected by current consumption
ISS.
Capacitor C1 reduces output fluctuation due to power-on, power fluctuation and load fluctuation. Set the
value according to the actual evaluation.
It is not recommended to add a capacitor between the VIN pin (power supply) and the VSS pin or the
VOUT pin (output) and the VSS pin because it causes output fluctuation and output oscillation due to
power-on.
GND
VOUT1
R2
R1
VOUT
VIN
VIN
CL
C1
CIN
VSS
S-812C
Series
Figure 22


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