S-8424AAAFT-TB-X Datasheet, PDF (17/46 Pages) Seiko Instruments Inc – BATTERY BACKUP SWITCHING IC

Rev.3.0_01
 Test Circuit
1.
VIN VRO or VOUT
VIN
VSS
↓
V
10 μF
3.
VIN
VBAT VOUT _CS
VIN
A
PREEND
A
VSS
RESET
A
VDS
5.
F.G^.
7.
VIN
VIN
VOUT
VSS VBAT CS
Oscilloscope
100 kΩ
Oscilloscope
VBAT
VIN
VBAT
VOUT
IOUT
VBAT
VSS
↓_V
BATTERY BACKUP SWITCHING IC
S-8424A Series
2.
VIN
V
V _VBAT
100 kΩ
VBAT VOUT
VIN
PREEND
VSS
RESET
CS
V
100 kΩ
100 kΩ
VV
To measure VDET3, apply 6 V to VIN.
4.
VIN
VOUT
VIN
V
VBAT
VBAT
V
VSS
Measure the value after applying 6 V to VIN.
6.
VIN
VBAT
VIN
A
VSS
8.
ISS _A
A IBAT
VIN
VBAT
VIN
VBAT
VSS
Leave open and measure the value after applying
6 V to VIN.
To measure IBAT2, apply 6 V to VIN and then leave
VIN open and measure IBAT.
Figure 5 Test Circuit
17