S-8327 Seiko, S-8327 Datasheet - Page 48

• Manufacturer Part Number: S-8327
• Description: (S-8323 / S-8327) SMALL PACKAGE PWM CONTROL STEP-UP SWITCHING REGULATOR
• Manufacturer: Seiko

Collection of Product FAQs
Author: Tachibana Midori
<Information level>
<Product>
Related Documents:
Question:
Answer:
A:
Index:
Division name: 01 IC
Category 1:
Category 2:
Cal No.:
Is there any way to adjust the output-voltage value using the DAC output of a microcomputer, etc.?
The output voltage can be adjusted by adding Tr2 and RE to the output-voltage regulation circuit in the
above circuit diagram. If the internal resistance of VOUT, etc. is not taken into account, output voltage
VEE can be represented by the following equation:
The above equation indicates that output voltage VEE changes with variations in DAC output voltage
VDAC of a microcomputer, etc.
VEE
VIN
=
VOUT
CIN
Tr1
×
L
RA
S-8323/24/27/28
Public (Printing O.K.)
B: Technical
11 Power Supply
4. Switching Regulators
RB
+
RB
VDD S-8327/8E
EXT
+
RA
×
Date: 98/11/12 (Thursday) 10:17 (Modified:)
VSS
VDAC
D
RE
VOUT
-
VBE
47
CC
RB
RA
Tr2
RE
VDAC
DAC
Output
COUT
Output voltage
VEE