s-8243b Seiko Instruments Inc., s-8243b Datasheet - Page 11

• Manufacturer Part Number: s-8243b
• Description: Battry Protection Ic For 3-serial Or 4-serial Cell Pack
• Manufacturer: Seiko Instruments Inc.

Rev.2.5
In this chapter test methods are explained for the case of S-8243B series, which is designed for 4-serial cell pack. For the
case of S-8243A series, which is designed for 3-serial cell, voltage source V2 should be shorted, V3 should be read as V2,
and V4 as V3.
1. Current consumption (Test circuit 1)
2. Voltage regulator (Test circuit 2)
3. Battery monitor amp and pin current for VC1 to VC3 (Test circuit 3)
Test Circuits
Current consumption at not monitoring V
3.5 V and V
V3 = V4 = 1.5 V and V
Output voltage of the regulator V
Line regulation of the voltage regulator ∆V
output voltage when V
= 3 mA.
Load regulation of the regulator is defined by the equation ∆V
V
Voltage gain of the battery monitor amp for each cell is defined by the input offset voltage and the measurement result
provided from the VBATOUT pin for the combination of the CTL3 pin and CTL4 pin expressed by the following table at
the condition where V1 = V2 = V3 = V4 = 3.5 V. Pin current for VC1 to VC3, I
measured.
DD
Voltage gain of the battery monitor amp for each cell is calculated by the equation
= V
CTL3 pin status
_00
V
V
V
V
V
GAMPn = (V
MP
CTL3L
CTL3L
CTL3H
CTL3H
CTL3H
Open
Open
Open
= 14 V and I
MP
max.
max.
min.
min.
min.
= V
BATTERY PROTECTION IC FOR 3-SERIAL OR 4-SERIAL CELL PACK
DD
BATn
. Current consumption at power down, I
DD
MP
OUT
−V
= V
CTL4 pin status
= V
OFFn
= 5 µA.
V
V
V
V
V
MP
CTL4L
CTL4L
CTL4H
CTL4H
CTL4H
SS
) / Vn (n = 1 to 4)
Open
Open
Open
.
= 6 V and I
OUT
max.
max.
min.
min.
min.
is a voltage measured at the VREG pin when V
BATOUT
OUT
Seiko Instruments Inc.
OUT1
VBATOUT pin output
= 3 mA, and V
, I
is defined by the equation ∆V
OPE
Table 8
, is a current measured at the VSS pin when V1 = V2 = V3 = V4 =
V
V
V
V
V
V
V
V
OFF1
BAT1
OFF2
BAT2
OFF3
BAT3
OFF4
BAT4
PDN
OUT2
OUT2
, is a current measured at the VSS pin when V1 = V2 =
is the output voltage when V
= V
OUT3
VCn (n = 1, 2, 3) pin current
I
−V
VCnN
OUT
at VCn pin (n = 1, 2, 3)
OUT1
I
I
I
where V
VC1
VC2
VC3
VCn
at VC1 pin
at VC2 pin
at VC3 pin
= V
DD
−
−
−
−
and I
= V
OUT2
OUT3
MP
−V
VCnN
S-8243A/B Series
is the output voltage when
= 14 V and I
DD
OUT1
= V
are at the same time
where V
MP
= 18 V and I
OUT
OUT1
= 3 mA.
is the
OUT
11