SSD1821 Solomon Systech, SSD1821 Datasheet - Page 35

• Manufacturer Part Number: SSD1821
• Description: (SSD1820A / SSD1821) LCD Segment / Common Driver
• Manufacturer: Solomon Systech

www.DataSheet4U.com
Application Circuit: DC-DC Converter Circuit Configuration
SSD1820A and SSD1821 IC work from 2X to 5X and 2X to 6X DC-DC converter respectively. For the capactior connections,
please refer to below circuit diagrams. Note that if the capacitor connection does not match with the software setting of DC-DC
Converter Factor (0x64~0x67), abnormal current consumption will be observed.
SOLOMON
*Note: Capacitor value = 1.0uF to 4.7uF
2x Converter
V
V
C
C
C
C
C
C
C
SS
CC
5P
3P
1N
1P
2P
2N
4P
5x Converter
+
+
V
V
C
C
C
C
C
C
C
SS
CC
5P
3P
1N
1P
2P
2N
4P
3x Converter
+
+
+
+
+
V
V
C
C
C
C
C
C
C
SS
CC
5P
3P
1N
1P
2P
2N
4P
6x Converter
+
+
+
V
V
C
C
C
C
C
C
C
SS
CC
5P
3P
1N
1P
2P
2N
4P
4x Converter
+
+
+
+
+
V
V
C
C
C
C
C
C
C
+
SS
CC
5P
3P
1N
1P
2P
2N
4P
+
+
+
+
REV 1.4
01/03
SSD1820A/21
35