S-8241 Seiko Instruments, S-8241 Datasheet - Page 18

• Manufacturer Part Number: S-8241
• Description: Battery Protection IC for 1-Cell Pack
• Manufacturer: Seiko Instruments

18
BATTERY PROTECTION IC FOR 1-CELL PACK
S-8241 Series
1-1. Overcharge and overdischarge detection (for products with power-down function)
1-2. Overcharge and overdischarge detection (for products without power-down function)
Timing Chart
B attery
voltage
DO pin
VM pin
C O pin
B a tt e r y
v o lta g e
V M p in
D O p in
C O p in
Charger
connected
Load
connected
Note: (1) N orm al m ode, (2) O vercharge m ode, (3) O verdischarge m ode, (4) O vercurrent m ode
M ode
C h a r g e r
c o n n e c te d
L o a d
c o n n e c te d
N o te : (1 ) N o rm a l m o d e , (2 ) O v e rc h a rg e m o d e , (3 ) O v e rd is c h a r g e m o d e , (4 ) O v e rc u rre n t m o d e
M o d e
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
D D
IO V 1
S S
C H A
CU
CL
DU
DL
DD
IO V1
SS
CHA
DD
SS
D D
S S
DD
SS
C U
C L
D U
D L
D D
S S
The charger is assum ed to charge with a constant current.
T h e c h a rg e r is a s s u m e d to c h a rg e w ith a c o n s ta n t c u rre n t.
O vercharge detection delay tim e (t
O v e r c h a r g e d e te c tio n d e la y tim e (t
( 1 )
(1)
( 2 )
(2)
Seiko Instruments Inc.
C U
C U
)
)
O v e r d is c h a rg e d e te c tio n d e la y tim e ( t
( 1 )
Figure 6
Figure 7
O verdischarge detection delay tim e (t
(1)
( 3 )
(3)
D L
(1 )
)
D L
)
O v e rd is c h a rg e d e te c tio n d e la y tim e ( t
(1)
( 3 )
Rev.4.1
(1 )
D L
)
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