S-8241 Datasheet, PDF (23/38 Pages) Seiko Instruments Inc – BATTERY PROTECTION IC FOR 1-CELL PACK

Rev.7.6_00
BATTERY PROTECTION IC FOR 1-CELL PACK
S-8241 Series
„ Timing Chart
(1) Overcharge and overdischarge detection (for products with power-down function)
B a tte ry
voltag e
VCU
VCL
V_DU
V_DL
V_DD
DO pin
V_SS
VDD
C O p in
V_SS
V_DD
VM p in
V _{IOV 1}
V SS
V _{C HA}
Char ger
conn ected
Loa d
conn ected
Mode
Ove rchar ge de te ctio n del ay time (tCU )
(1)
(2)
O ve rdisch arge d etection d elay ti me (tDL)
(1)
(3)
(1)
N ote: (1) Norm al m ode, (2) Ov erc harge m ode, (3) Ov erdisc harge mode, (4) Overcurrent m ode
T he charger is as sumed to c harge with a c onstant c urrent.
Figure 7
(2) Overcharge and overdischarge detection (for products without power-down function)
B atte ry
vo lta ge
VCU
VCL
V_DU
VDL
V _DD
DO p in
V SS
C O pin
VDD
V _SS
V DD
V M p in
V _{IO V1}
V SS
V CH A
C ha rge r
con nected
Lo ad
con nected
O v erc ha rge d et ec ti on de lay tim e ( tC U)
O v erdi sc h arg e detec t ion d ela y t im e (t_DL)
O v erd is c harg e detec tio n dela y tim e (tDL )
M ode
(1 )
(2 )
(1 )
(3)
(1 )
(3 )
(1 )
N o te : (1 ) N o rm a l m o d e , ( 2 ) O ve r ch a r g e m o d e , ( 3 ) O ve r d is ch a r g e m o d e , (4 ) O v e rc u rr e n t m o d e
T h e ch a r g e r is a ssu m e d to c h a r g e wi th a co n st a n t cu r re n t.
Figure 8
Seiko Instruments Inc.
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