s-8424a Seiko Instruments Inc., s-8424a Datasheet - Page 16

• Manufacturer Part Number: s-8424a
• Description: Battery Backup Switching Ic
• Manufacturer: Seiko Instruments Inc.

16
BATTERY BACKUP SWITCHING IC
S-8424A Series
Test Circuit
1.
3.
5.
7.
Leave open and measure the value after applying
6 V to VIN.
F.G
V
V
IN
IN
V
IN
.
VIN
VSS
V
BAT
VIN
VSS
VSS
VIN
VBAT VOUT
VBAT
VBAT
VIN
VRO or VOUT
VOUT
PREEND
V
RESET
CS
BAT
VSS
CS
VOUT
100 k Ω
↓
Oscilloscope
Oscilloscope
I
A
A
A
OUT
Seiko Instruments Inc.
10 μ F
↓
Figure 5 Test Circuit
V
V
V
DS
2.
4.
6.
8.
To measure V
Measure the value after applying 6 V to VIN.
To measure I
VIN open and measure I
V
V
IN
V
V
V
IN
I
V
SS
IN
IN
VIN
VSS
A
VBAT
BAT2
V
DET3
V
BAT
BAT
, apply 6 V to VIN and then leave
V
PREEND
, apply 6 V to VIN.
VBAT
VIN
VOUT
A
BAT
A
RESET
I
BAT
VSS
V
CS
100 k Ω
BAT
VIN
VBAT
VIN
VBAT
.
VOUT
V
VSS
VSS
V
100 k Ω
V
Rev.2.2
100 k Ω
V
_00