S-8232 Series 8232 series lithium-ion lithium-polymer rechargeabl

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S-8232 Series 8232 series lithium-ion lithium-polymer rechargeabl

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BATTERY PROTECTION 2-SERIAL-CELL PACK
S-8232 Series
8232 series lithium-ion lithium-polymer rechargeable battery protection incorporating highaccuracy voltage detection circuit delay circuit. S-8232 series suitable 2-cell serial lithium-ion lithium-polymer battery packs.
Features
Internal high-accuracy voltage detection circuit Overcharge detection voltage 3.85 4.60 Applicable step Overcharge release voltage 3.60 4.60 Applicable step (The overcharge release voltage selected within range where difference from overcharge detection voltage Overdischarge detection voltage 1.70 2.60 Applicable step Overdischarge release voltage 1.70 3.80 Applicable step (The overdischarge release voltage selected within range where difference from overdischarge detection voltage Overcurrent detection voltage 0.07 0.30 Applicable step High input-voltage device Absolute maximum ratings Wide operating voltage range delay time every detection external capacitor. (Each delay time Overcharge detection, Overdischarge detection, Overcurrent detection "Proportion hundred one".) overcurrent detection levels (Protection short-circuiting) Internal auxiliary over voltage detection circuit (Fail-safe overcharge detection voltage) Internal charge circuit battery (Unavailable option) current consumption Operation mode typ. 14.2 max. Power-down mode typ. max. Lead-free products
Application
Lithium-ion rechargeable battery packs Lithium- polymer rechargeable battery packs
Package
Package Name 8-Pin TSSOP Package FT008-A Drawing Code Tape FT008-E Reel FT008-E
Seiko Instruments Inc.
BATTERY PROTECTION 2-SERIAL-CELL PACK S-8232 Series Block Diagram
SENS Reference voltage Auxiliary overcharge detector Overcharge detector Overdischarge detector Control logic Delay circuit control signal
Overdischarge detector Overcharge detector Delay circuit control signal Delay circuit control signal RCOL
Over current detection circuit Delay circuit control signal Delay circuit control signal
Auxiliary overcharge Reference detector voltage
Remark Resistor (RCOL) connected transistor although serves CMOS output. this, impedance becomes high when outputting from pin. Refer Electrical Characteristics" impedance value. Figure
Seiko Instruments Inc.
Rev.5.4_00 Product Name Structure
Product Name
BATTERY PROTECTION 2-SERIAL-CELL PACK S-8232 Series
S-8232 direction tape specifications Package code 8-Pin TSSOP Serial code Sequentially from
Refer taping specifications. Product Name List Table
Overcharge detection voltage 4.25 4.35 4.35 4.35 4.25 4.25 4.25 4.20 4.30 Overcharge release voltage 4.05 4.15 4.15 4.28 4.05 4.05 4.05
Product name Item
Overdischarge detection voltage 2.40 2.30 2.30 2.15 2.30 2.20 2.20 2.40 2.40 2.30 2.00 2.00 2.00 2.30 2.30 2.00 2.40 2.00 2.30 2.30 2.00 2.30
S-8232AAFT-T2-G S-8232ABFT-T2-G S-8232ACFT-T2-G S-8232AEFT-T2-G S-8232AFFT-T2-G S-8232AHFT-T2-G S-8232AIFT-T2-G S-8232AJFT-T2-G S-8232AKFT-T2-G S-8232ALFT-T2-G
Overcharge detection battery delay time charging function 0.22 3.00 0.150 Available Overdischarge release voltage1, Overcurrent detection voltage VIOV1 3.00 0.300 3.00 0.300 2.80 0.100 2.70 0.300 2.40 0.200 2.40 0.300 3.00 0.300 3.00 0.150 2.90 0.200 3.00 0.200 3.00 0.190 3.00 0.300 3.00 0.230 2.90 0.100 2.50 0.300 3.00 0.300 3.00 0.190 3.00 0.200 3.00 3.00 2.00 2.30 0.300 20mV 0.20 0.20 0.20 3.00 0.150 Available Unavailable Available Available Available Available Unavailable Unavailable Available Available Available Unavailable Available Unavailable Unavailable Unavailable Available Unavailable Available Unavailable Unavailable Available Available
S-8232AGFT-T2-G 4.25
4.325 4.325
4.05 4.00 4.05 4.19
S-8232AMFT-T2-G 4.19 S-8232AOFT-T2-G 4.30 S-8232APFT-T2-G 4.28
S-8232ANFT-T2-G 4.325 4.325 2.40
4.05 4.05 4.20
S-8232ARFT-T2-G 4.325 4.325 2.00
S-8232ASFT-T2-G*4 4.295 S-8232AUFT-T2-G S-8232AVFT-T2-G 4.30 4.30
S-8232ATFT-T2-G 4.125 4.125 4.10 4.05 4.15
S-8232AWFT-T2-G 4.35 S-8232AXFT-T2-G 4.325 S-8232AYFT-T2-G S-8232AZFT-T2-G 4.30 4.30
4.200 4.05 4.05
Seiko Instruments Inc.
BATTERY PROTECTION 2-SERIAL-CELL PACK S-8232 Series
Table
Overcharge detection voltage Overcharge release voltage
Product name Item
S-8232NAFT-T2-G S-8232NBFT-T2-G S-8232NCFT-T2-G S-8232NDFT-T2-G S-8232NEFT-T2-G S-8232NFFT-T2-G S-8232NGFT-T2-G S-8232NHFT-T2-G S-8232NIFT-T2-G S-8232NJFT-T2-G S-8232NKFT-T2-G S-8232NLFT-T2-G S-8232NMFT-T2-G S-8232NNFT-T2-G S-8232NPFT-T2-G S-8232NQFT-T2-G S-8232NRFT-T2-G S-8232NSFT-T2-G S-8232NUFT-T2-G
4.325 4.325
Overcharge detection battery delay time charging function 0.22 2.40 3.00 0.15 Unavailable Overdischarge detection voltage Overdischarge release voltage1, Overcurrent detection voltage VIOV1 3.00 2.20 2.30 2.30 2.30 2.60 2.30 2.50 2.30 2.30 2.30 2.30 2.20 2.20 2.30 2.60 2.60 2.30 2.00 2.23 3.70 3.00 2.30 3.00 2.90 3.00 2.90 3.00 2.90 2.30 3.00 2.90 2.40 2.40 3.00 3.00 3.00 3.00 2.00 2.23 0.30 0.20 0.15 0.23 0.21 0.30 0.11 0.15 0.11 0.12 0.23 0.08 0.13 0.13 0.30 0.30 0.30 0.30 0.09 0.15 0.09 Unavailable Unavailable Available Available Unavailable Available Unavailable Unavailable Available Available Available Available Unavailable Unavailable Unavailable Unavailable Unavailable Unavailable Unavailable Available Unavailable
4.35 4.275 4.35 4.35 4.325 4.35 4.28 4.25 4.28 4.35 4.30 4.28 4.28 4.25 4.25 4.15 4.15 3.85
4.25 4.05 4.15 4.15
4.15 4.05 4.05
4.05 4.15 4.05 4.05 4.08
S-8232NOFT-T2-G 4.295
4.045 4.05 4.05 3.95 3.95 4.15 3.75
S-8232NTFT-T2-G 4.225 S-8232NWFT-T2-G 4.210
4.125 2.00 2.00 overcharge detection release hysteresis magnification final overcharge 1.11; others 1.25. final overcharging function Refer Operation".
Remark Please contact sales office products with detection voltage value other than those specified above. overdischarge detection voltage selected within range from When overdischarge detection voltage higher than overcharge detection voltage overcharge release voltage limited "Table Table
Overdischarge detection voltage 1.70 2.60 1.70 2.80 1.70 3.00
Overcharge detection voltage 3.85 4.60 3.85 4.60 3.85 4.50
Voltage difference between overcharge detection voltage overcharge release voltage 0.30 0.20 0.10
Seiko Instruments Inc.
Rev.5.4_00 Configuration
8-Pin TSSOP view
BATTERY PROTECTION 2-SERIAL-CELL PACK S-8232 Series
Table
SENS
Symbol SENS
Figure
Description Detection voltage between SENS (Detection overcharge overdischarge) gate connection discharge control (CMOS output) gate connection charge control (CMOS output) Detection voltage between (Overcurrent detection pin) Negative power input Capacitor connection detection delay Middle voltage input Positive power input
Seiko Instruments Inc.
BATTERY PROTECTION 2-SERIAL-CELL PACK S-8232 Series Absolute Maximum Ratings
Table
Item Input voltage between SENS input voltage input voltage input voltage output voltage output voltage Power dissipation
Symbol VSENS VICT
Applied SENS
Operating ambient temperature Topr Storage temperature Tstg When mounted board [Mounted board] Board size 114.3 76.2 t1.6 Name JEDEC STANDARD51-7
unless otherwise specified) Absolute Maximum Ratings Unit (When mounted board) 700*1
Caution absolute maximum ratings rated values exceeding which product could suffer physical damage. These values must therefore exceeded under conditions.
Power Dissipation (PD) [mW]
Ambient Temperature (Ta) [°C]
Figure Power Dissipation Package (When Mounted Board)
Seiko Instruments Inc.
Rev.5.4_00 Electrical Characteristics
BATTERY PROTECTION 2-SERIAL-CELL PACK S-8232 Series
Table Item [DETECTION VOLTAGE] Overcharge detection voltage Auxiliary overcharge detection voltage VCUaux1, VCUaux2 VCU1, VCU2 1.25 VCUaux1, VCUaux2 VCU1, VCU2 1.11 Overcharge release voltage Overdischarge detection voltage Overdischarge release voltage Overcurrent detection voltage Overcurrent detection voltage Temperature coefficient detection voltage Temperature coefficient detection voltage [DELAY TIME 0.22 Overcharge detection delay time Overdischarge detection delay time Overcurrent detection delay time [INPUT VOLTAGE]
Symbol
Condition
unless otherwise specified) Test Test Min. Typ. Max. Unit Condition Circuit
VCU1, 0.025 VCU1, 1.21 VCU1, 1.07 VCD1, 0.050 VDD1, 0.080 VDU1, 0.100 VIOV1 0.020 VCU1, 0.025 VCU1, VCU1, 1.25 1.29 VCU1, VCU1, 1.11 1.15 VCD1, VCD1, 0.050 VDD1, VDD1 0.080 VDU1, VDU1, 0.100 VIOV1 VIOV1 0.020 1.20 0.05 1.00 0.0002 0.83 1.35 13.9 12.7 0.04 VCU1, mV/°C mV/°C
VCU1, 3.85 4.60 Adjustable VCUaux1, VCU1, 1.25 VCUaux1, VCU1, 1.11
VCD1, 3.60 4.60 Adjustable VDD1, 1.70 2.60 Adjustable VDU1, 1.70 3.80 Adjustable VIOV1 0.07 0.30 Adjustable VIOV2 Load short circuit, 1.57 reference TCOE1 TCOE2 0.24 tCU1, tDD1, tIOV1 0.01 Absolute maximum rating 0.73
Input voltage between [OPERATING VOLTAGE] Operating voltage between [CURRENT CONSUMPTION] Current consumption during normal operation Current consumption power down [OUTPUT VOLTAGE] voltage voltage voltage INTERNAL RESISTANCE] Resistance between [INTERNAL RESISTANCE] Resistance between Resistance between BATTERY CHARGE FUNCTION]
VDSOP Output logic fixed IOPE IPDN
VDO(H) IOUT VDO(L) IOUT VCO(H) IOUT RCOL RVCM RVSM
0.05 0.003 0.003 0.05 0.15 0.019 0.29 1.44
V0CHA battery charging 0.38 0.75 1.12 function "available" battery charging 0.32 0.88 1.44 battery charge inhibition battery voltage V0INH1, function "unavailable" Auxiliary overcharge detection voltage equal overcharge detection voltage times 1.11 products without overcharge hysteresis, times 1.25 other products. Temperature coefficient detection voltage should applied overcharge detection voltage, overcharge release voltage, overdischarge detection voltage, overdischarge release voltage. Temperature coefficient detection voltage should applied overcurrent detection voltage. logic established operating voltage. battery charge starting charger voltage
Seiko Instruments Inc.
BATTERY PROTECTION 2-SERIAL-CELL PACK S-8232 Series
Table Item [DETECTION VOLTAGE] Overcharge detection voltage Auxiliary overcharge detection voltage VCUaux1, VCUaux2 VCU1, VCU2 1.25 VCUaux1, VCUaux2 VCU1, VCU2 1.11 Overcharge release voltage Overdischarge detection voltage Overdischarge release voltage Overcurrent detection voltage Overcurrent detection voltage Temperature coefficient detection voltage Temperature coefficient detection voltage [DELAY TIME 0.22 Overcharge detection delay time Overdischarge detection delay time Overcurrent detection delay time [INPUT VOLTAGE]
Symbol
unless otherwise specified) Test Test Condition Min. Typ. Max. Unit Condition Circuit
VCU1, 0.045 VCU1, 1.19 VCU1, 1.05 VCD1, 0.070 VDD1, 0.100 VDU1, 0.120 VIOV1 0.029 VCU1, 0.040 VCU1, VCU1, 1.25 1.31 VCU1, VCU1, 1.11 1.17 VCD1, VCD1, 0.065 VDD1, VDD1 0.095 VDU1, VDU1, 0.115 VIOV1 VIOV1 0.029 1.20 0.05 1.00 0.0002 0.74 1.84 14.5 13.8 0.06 VCU1, mV/°C mV/°C
VCU1, 3.85 4.60 Adjustable VCUaux1, VCU1, 1.25 VCUaux1, VCU1, 1.11
VCD1, 3.60 4.60 Adjustable VDD1, 1.70 2.60 Adjustable VDU1, 1.70 3.80 Adjustable VIOV1 0.07 0.30 Adjustable VIOV2 Load short circuit, 1.66 reference TCOE1 TCOE2 0.24 tCU1, tDD1, tIOV1 0.01 Absolute maximum rating 0.60
Input voltage between [OPERATING VOLTAGE] Operating voltage between [CURRENT CONSUMPTION] Current consumption during normal operation Current consumption power down [OUTPUT VOLTAGE] voltage voltage voltage INTERNAL RESISTANCE] Resistance between [INTERNAL RESISTANCE] Resistance between Resistance between BATTERY CHARGE FUNCTION]
VDSOP Output logic fixed IOPE IPDN
VDO(H) IOUT VDO(L) IOUT VCO(H) IOUT RCOL RVCM RVSM
0.14 0.003 0.003 0.14 0.24 0.019 0.24 1.96 1332
V0CHA battery charging 0.29 0.75 1.21 function "available" battery charging 0.23 0.88 1.53 battery charge inhibition battery voltage V0INH1, function "unavailable" Auxiliary overcharge detection voltage equal overcharge detection voltage times 1.11 products without overcharge hysteresis, times 1.25 other products. Temperature coefficient detection voltage should applied overcharge detection voltage, overcharge release voltage, overdischarge detection voltage, overdischarge release voltage. Temperature coefficient detection voltage should applied overcurrent detection voltage. logic established operating voltage. battery charge starting charger voltage
Seiko Instruments Inc.
BATTERY PROTECTION 2-SERIAL-CELL PACK S-8232 Series
Table Item Symbol
unless otherwise specified) Test Test Condition Min. Typ. Max. Unit Condition Circuit
VCU1, 0.055 VCU1, 1.19 VCU1, 1.05 VCD1, 0.080 VDD1, 0.110 VDU1, 0.130 VIOV1 0.033 VCU1, 0.045 VCU1, VCU1, 1.25 1.31 VCU1, VCU1, 1.11 1.17 VCD1, VCD1, 0.070 VDD1, VDD1 0.100 VDU1, VDU1, 0.120 VIOV1 VIOV1 0.033 1.20 0.05 1.00 0.0002 0.71 2.06 14.7 14.2 0.10 VCU1, mV/°C mV/°C
[DETECTION VOLTAGE] Overcharge detection voltage Auxiliary overcharge detection voltage VCUaux1, VCUaux2 VCU1, VCU2 1.25 VCUaux1, VCUaux2 VCU1, VCU2 1.11 Overcharge release voltage Overdischarge detection voltage Overdischarge release voltage Overcurrent detection voltage Overcurrent detection voltage Temperature coefficient detection voltage Temperature coefficient detection voltage [DELAY TIME 0.22 Overcharge detection delay time Overdischarge detection delay time Overcurrent detection delay time [INPUT VOLTAGE]
VCU1, 3.85 4.60 Adjustable VCUaux1, VCU1, 1.25 VCUaux1, VCU1, 1.11
VCD1, 3.60 4.60 Adjustable VDD1, 1.70 2.60 Adjustable VDU1, 1.70 3.80 Adjustable VIOV1 0.07 0.30 Adjustable VIOV2 Load short circuit, 1.70 reference TCOE1 TCOE2 0.24 tCU1, tDD1, tIOV1 0.01 Absolute maximum rating 0.55
Input voltage between [OPERATING VOLTAGE] Operating voltage between [CURRENT CONSUMPTION] Current consumption during normal operation Current consumption power down [OUTPUT VOLTAGE] voltage voltage voltage INTERNAL RESISTANCE] Resistance between [INTERNAL RESISTANCE] Resistance between Resistance between BATTERY CHARGE FUNCTION]
VDSOP Output logic fixed IOPE IPDN
VDO(H) IOUT VDO(L) IOUT VCO(H) IOUT RCOL RVCM RVSM
0.17 0.003 0.003 0.17 0.27 0.019 0.22 2.20 1491
V0CHA battery charging 0.26 0.75 1.25 function "available" battery charging 0.20 0.88 1.57 battery charge inhibition battery voltage V0INH1, function "unavailable" Auxiliary overcharge detection voltage equal overcharge detection voltage times 1.11 products without overcharge hysteresis, times 1.25 other products. Temperature coefficient detection voltage should applied overcharge detection voltage, overcharge release voltage, overdischarge detection voltage, overdischarge release voltage. Temperature coefficient detection voltage should applied overcurrent detection voltage. logic established operating voltage. battery charge starting charger voltage
Seiko Instruments Inc.
BATTERY PROTECTION 2-SERIAL-CELL PACK S-8232 Series Test Circuits
Test Condition Test Circuit
OFF, under normal condition. Increase from gradually. voltage when overcharge detection voltage (VCU1). Decrease gradually. voltage when overcharge release voltage (VCD1). Further decrease voltage when overdischarge voltage (VDD1). Increase gradually. voltage when overdischarge release voltage (VDU1). under normal condition. Increase from gradually. voltage when auxiliary overcharge detection voltage (VCUaux1).
Test Condition Test Circuit
OFF, under normal condition. Increase from gradually. voltage when overcharge detection voltage (VCU2). Decrease gradually. voltage when overcharge release voltage (VCD2). Further decrease voltage when overdischarge voltage (VDD2). Increase gradually. voltage when overdischarge release voltage (VDU2). under normal condition. Increase from gradually. voltage when auxiliary overcharge detection voltage (VCUaux2).
Test Condition Test Circuit
OFF, under normal condition. Increase from gradually. voltage when overcurrent detection voltage (VIOV1). under normal condition. Increase from gradually. (The voltage change rate voltage when overcurrent detection voltage (VIOV2).
Test Condition Test Circuit
under normal condition measure current consumption. Current consumption normal condition current consumption (IOPE). OFF, under overdischarge condition measure current consumption. Current consumption power-down current consumption (IPDN).
Test Condition Test Circuit
under overdischarge condition. internal resistance between (RVCM). under overcurrent condition. internal resistance between (RVSM).
Test Condition Test Circuit
OFF, under normal condition. Increase from gradually. voltage when voltage (VDO(H)). OFF, under overcurrent condition. Increase from gradually. voltage when voltage (VDO(L)).
Seiko Instruments Inc.
BATTERY PROTECTION 2-SERIAL-CELL PACK S-8232 Series
Test Condition Test Circuit
OFF, under normal condition. Increase from gradually. voltage when voltage (VCO(H)). OFF, 4.7, under over voltage condition. (V5) internal resistance (RCO(L)).
Test Condition Test Circuit
under normal condition. Increase from (VCU1 (VCU1 immediately (within µs). time after becomes (VCU1 until goes overcharge detection delay time (tCU1). under normal condition. Decrease from (VDD1 (VDD1 immediately (within µs). time after becomes (VDD1 until goes overdischarge detection delay time (tDD1).
Test Condition Test Circuit
under normal condition. Increase from (VCU2 (VCU2 immediately (within µs). time after becomes (VCU2 until goes overcharge detection delay time (tCU2). under normal condition. Decrease from (VDD2 (VDD2 immediately (within µs). time after becomes (VDD2 until goes overdischarge detection delay time (tDD2).
(10) Test Condition Test Circuit
under normal condition. Increase from immediately (within µs). time after becomes until goes overcurrent detection delay time (tIOV1).
(11) Test Condition Test Circuit
increase gradually. voltage when (VVM higher) charge starting voltage (V0CHA).
(12) Test Condition Test Circuit
increase gradually. voltage when (VVM higher) charge inhibiting voltage (V0INH1).
(13) Test Condition Test Circuit
increase gradually. voltage when (VVM higher) charge inhibiting voltage (V0INH2).
Seiko Instruments Inc.
BATTERY PROTECTION 2-SERIAL-CELL PACK S-8232 Series
SENS S-8232 Series
SENS S-8232 Series
Test Circuit
SENS S-8232 Series
Test Circuit
SENS S-8232 Series
Test Circuit
SENS S-8232 Series 0.22
Test Circuit
SENS
S-8232 Series
Test Circuit Figure
Test Circuit
Seiko Instruments Inc.
Rev.5.4_00 Operation
Normal Condition
BATTERY PROTECTION 2-SERIAL-CELL PACK S-8232 Series
This monitors voltages serially connected batteries discharge current control charging discharging. When voltages batteries range from overdischarge detection voltage (VDD1, overcharge detection voltage (VCU1, current flowing through batteries becomes equal lower than specified value (the voltage equal lower than overcurrent detection voltage charging discharging FETs turned this condition, charging discharging carried freely. This condition called normal condition. this condition, pins shorted RVSM resistor.
Overcurrent Condition
When discharging current becomes equal higher than specified value (the voltage equal higher than overcurrent detection voltage) during discharging under normal condition continues overcurrent detection delay time (tIOV) longer, discharging turned stop discharging. This condition called overcurrent condition. pins shorted RVSM resistor this time. charging also turned off. When discharging load connected, voltage equals potential. overcurrent condition returns normal condition when load released impedance between pins (refer Figure higher. When load released, pin, which shorted with RVSM resistor, goes back potential. detects that potential returns overcurrent detection voltage (VIOV1) lower returns normal condition.
Overcharge Condition
Following cases detected overcharge conditions battery voltages becomes higher than overcharge detection voltage (VCU1, during charging under normal condition continues overcharge detection delay time (tCU1, longer, charging turns stop charging. battery voltages becomes higher than auxiliary overcharge detection voltage (VCUaux1, charging turns immediately stop charging. pins shorted RVSM resistor under overcharge condition. auxiliary overcharge detection voltages (VCUaux1, correlated with overcharge detection voltages (VCU1, defined following equations VCUaux1, 1.25 VCU1, overcharge hysteresis type (VCU1, VCD1, VCUaux1, 1.11 VCU1, overcharge condition released cases battery voltage which exceeded overcharge detection voltage (VCU1, falls below overcharge release voltage (VCD1, charging turns normal condition returns. battery voltage which exceeded overcharge detection voltage (VCU1, equal higher than overcharge release voltage (VCD1, charger removed, load placed, discharging starts, charging turns normal condition returns. release mechanism follows discharge current flows through internal parasitic diode charging immediately after load installed discharging starts, voltage increases about from voltage momentarily. detects this voltage (overcurrent detection voltage higher), releases overcharge condition returns normal condition.
Overdischarge Condition
battery voltages falls below overdischarge detection voltage (VDD1, during discharging under normal condition continues overdischarge detection delay time (tDD1, longer, discharging turns discharging stops. This condition called overdischarge condition. When discharging turns off, voltage becomes equal voltage IC's current consumption falls below power-down current consumption (IPDN). This condition called power-down condition. pins shorted RVCM resistor under overdischarge power-down conditions. power-down condition canceled when charger connected voltage between overcurrent detection voltage higher. When battery voltages becomes equal higher than overdischarge release voltage (VDU1, this condition, overdischarge condition changes normal condition. Seiko Instruments Inc.
BATTERY PROTECTION 2-SERIAL-CELL PACK S-8232 Series
Delay Circuit
overcharge detection delay time (tCU1, overdischarge detection delay time (tDD1, overcurrent detection delay time (tI0V1) change with external capacitor (C3). Since capacitor determine each delay time, delay times correlated following ratio Overcharge delay time Overdischarge delay time Overcurrent delay time delay times calculated following equations Min., Typ., Max. Overcharge detection delay time Delay factor 2.500, 4.545, 9.364 [µF] Overdischarge detection delay time Delay factor 0.3045, 0.4545, 0.6409 [µF] Overcurrent detection delay time tIOV1 Delay factor 0.02864, 0.04545, 0.06682 [µF]
Remark delay time overcurrent detection fixed internal circuit. delay time cannot changed external capacitor. Battery Charging Function
This function used recharge both serially-connected batteries after they self-discharge When charging start voltage (V0CHA) higher applied between connecting charger, charging gate fixed potential. When voltage between gate source charging becomes equal higher than turn-on voltage charger voltage, charging turns start charging. this time, discharging turns charging current flows through internal parasitic diode discharging FET. battery voltages become equal higher than overdischarge release voltage (VDU1, normal condition returns.
Battery Charge Inhibiting Function
This function used inhibiting charging when either connected batteries goes self-discharge. When voltage either connected batteries goes below charge inhibit voltage (V0INH1, charging gate fixed "EB-" inhibit charging. Charging possible only when voltage both connected batteries goes charge inhibit voltage (V0INH1, more. Note that charging possible when total voltage both connected batteries less than minimum value (VDSOPmin) operating voltage between even voltage either connected batteries charge inhibit voltage (V0INH1, less. Charging prohibited when total voltage both connected batteries reaches minimum value (VDSOPmin) operating voltage between VSS. When using this optional function, resistor needed between gate source charging control (refer Figure
When initially connecting batteries, fail enter normal condition (discharging ready state). once voltage (short pins connect charger). products indicated with Product Name List Product Name Structure" "overcharge detection release hysteresis", final overcharge function", battery charge inhibiting function." following phenomena found, there problem practical use. product overcurrent condition overload connection when battery voltage overcharge release voltage (VCD1, more overcharge detection voltage (VCU1, less. Usually, returns normal condition when overload removed under this condition. However, charging turned when overload removed under this condition, leading overcharge condition. attach load start discharge. charging turned return normal condition. Refer "Overcharge condition" this section. Some lithium batteries recommended recharged after having been completely discharged. Please contact battery manufacturer when decide select battery charging function.
Seiko Instruments Inc.
Rev.5.4_00 Timing Charts
Overcharge Detection
VCUaux Battery voltage voltage voltage voltage VIOV1 Charger connection Load connection Delay Mode
BATTERY PROTECTION 2-SERIAL-CELL PACK S-8232 Series
battery
battery
over voltage detect
over voltage detect
auxiliary over voltage detect
auxiliary over voltage detect
VIOV2
Delay
Delay time
Delay time
Normal mode Over charge mode Over discharge mode Over current mode
Remark charger assumed charge with constant current. Figure
Seiko Instruments Inc.
BATTERY PROTECTION 2-SERIAL-CELL PACK S-8232 Series
Overdischarge Detection
Battery voltage voltage voltage VIOV2 voltage VIOV1 Charger connection Load connection Delay Mode Delay Delay battery battery
Normal mode Over charge mode Over discharge mode Over current mode
Remark charger assumed charge with constant current. Figure
Seiko Instruments Inc.
Overcurrent Detection
Battery voltage voltage voltage voltage VIOV1 Charger connection Load connection delay tIOV1 Mode
BATTERY PROTECTION 2-SERIAL-CELL PACK S-8232 Series
battery
VIOV2
delay tIOV2
tIOV1
Normal mode Over charge mode Over discharge mode Over current mode
Remark charger assumed charge with constant current. Figure
Seiko Instruments Inc.
BATTERY PROTECTION 2-SERIAL-CELL PACK S-8232 Series Battery Protection Connection Example
SENS Battery Battery 0.22 Delay time setting 0.22 0.22 S-8232 Series
FET1
FET2
Figure Table Constants External Components
Symbol FET1 FET2 Parts Chip resistor Chip capacitor Chip resistor Chip capacitor Chip resistor Purpose Discharge control Charge control protection Filter protection Filter protection Typ. 0.22 0.22 0.22 Min. Max. Remark min. max. Same value Attention should paid leak current Discharge can't stopped less than when charger reverse-connected. should added when product battery charge inhibition. Lower resistance increases current consumption.
Chip capacitor Delay time setting Chip resistor Protection charger reverse connection battery charging inhibition
Chip resistor
(4.7
required. Overcharge detection voltage increases example (R4) increases overcharge detection voltage overcharge detection delay time (tCU), overdischarge detection delay time (tCD), over current detection delay time (tIOV) change with external capacitor Refer Electrical Characteristics". When resistor less than charger reverse-connected, current which exceeds power dissipation package will flow break. excessive causes increase overcurrent detection voltage (VIOV1). VIOV1 changes VIOV1 RVSM) RVSM VIOV1. example, resistor (R3) increases overcurrent detection voltage (VIOV1) from 0.100 0.113 resistor needed inhibit battery charging. Current consumption increases when resistance below should connected when product battery charging inhibition. Caution above constants changed without notice. been confirmed whether operation normal circuits other than above example connection. addition, example connection shown above constant guarantee proper operation. Perform through evaluation using actual application constant.
Seiko Instruments Inc.
Rev.5.4_00 Precautions
BATTERY PROTECTION 2-SERIAL-CELL PACK S-8232 Series
After overcurrent detection delay, either battery voltages equals overdischarge detection voltage (VDD1,2) lower, overdischarge detection delay time becomes shorter than 10ms (min.). occurs because capacitor sets delay times (refer Figure
attery voltage
battery voltage equal less overdischarge voltage (VDD) after stopping overcurrent.
voltage
over current delay over discharge delay delay time becomes shorter than typical
voltage
Load connect
Figure
[Cause] When overcurrent detection released until tIOV1, capacitor charged S-8232 Series. battery voltage lower than VDD1, that time, charging goes delay time shorter than typical. [Conclusion] This phenomenon occurs when battery voltage nearly equal overdischarge voltage (VDD1, after overcurrent detected. means that battery capacity small those must charged future. Even state changes overdischarge condition, battery package capacity same typical. When battery voltages overdischarge detection voltage (VDD1, lower other becomes higher than overcharge detection voltage (VCU1, detects overcharge without overcharge detection delay time (tCU) (refer Figure
attery oltage attery oltage oltage
elay Charger connected
Overcharge detect
Overdischarge state
Figure
[Cause] same overdischarge detection under overcurrent condition. occurs because capacitor sets delay times. [Conclusion] This phenomenon occurs when battery voltage lower than overdischarge voltage (VDD1, batteries charged charger. Since voltage difference between batteries large this situation, S-8232 Series immediately stops charging other battery reduce voltage difference. This action improves safety battery pack dose harm pack.
Seiko Instruments Inc.
BATTERY PROTECTION 2-SERIAL-CELL PACK S-8232 Series
After overcurrent detection, load connected long time, even battery voltage became lower than overdischarge detection voltage (VDD1, can't detects overdischarge long load connected. Therefore IC's current consumption battery voltage lower than overdischarge detection voltage same normal condition current consumption (IOPE) (refer Figure 11).
battery voltage less than overdischarge detection voltage, self current consum ption attery voltage
long load connected, current norm current consum ption
urrent consum ption
voltage
voltage
Load connect
over current delay Long haul load connected
Figure
[Cause] reason follows. overcurrent detection overdischarge detection occur same time, overcurrent detection takes precedence overdischarge detection. long detects overcurrent, can't detect overdischarge. [Conclusion] load taken least time, overcurrent released overdischarge detection works. Unless keeping with load long time, reduction battery voltage will neglected, because IC's current consumption (typ. small. apply electrostatic discharge this that exceeds performance ratings built-in electrostatic protection circuit. claims responsibility disputes arising connection with infringement products including this upon patents owned third party.
Seiko Instruments Inc.
Rev.5.4_00 Typical Characteristics
BATTERY PROTECTION 2-SERIAL-CELL PACK S-8232 Series
Detection Voltage Temperature Characteristics
Overcharge detection voltage1 temperature
Overcharge detection voltage2 temperature
VCU1 4.30
VCU2 4.30
VCU1
VCU2
[°C]
Overcharge release voltage1 temperature
[°C]
Overcharge release voltage2 temperature
VCD1 4.00
VCD2 4.00
VCD1
VCD2
[°C]
Auxiliary overcharge detection voltage1 temperature
5.45
[°C]
Auxiliary overcharge detection voltage2 temperature
5.45
VCUaux1 5.375
VCUaux2 5.375
VCUaux1
VCUaux2
5.35
5.35
5.25
5.25
[°C]
[°C]
Seiko Instruments Inc.
BATTERY PROTECTION 2-SERIAL-CELL PACK S-8232 Series
Overdischarge detection voltage1 temperature
Overdischarge detection voltage2 temperature
VDD1 2.00
VDD2 2.00
VDD1
VDD2
[°C]
Overdischarge release voltage1 temperature
[°C]
Overdischarge release voltage1 temperature
VDU1 2.60
VDU2 2.60
VDU1
VDU2
[°C]
Overcurrent1 detection voltage temperature
0.12
[°C]
Overcurrent1 detection voltage temperature
-1.10 -1.15
VIOV1
VIOV2 1.20 (VCC reference)
VIOV1
0.10
VIOV2
-1.20 -1.25 -1.30
0.08
[°C]
[°C]
Seiko Instruments Inc.
BATTERY PROTECTION 2-SERIAL-CELL PACK S-8232 Series
Current Consumption Temperature Characteristics Current consumption temperature normal mode
Current consumption temperature power-down mode
IOPE [µA]
IPDN [nA]
[°C]
Delay Time Temperature Characteristics
[°C]
Overcharge detection1 time temperature
Overcharge detection1 time temperature
0.22 [µF]
0.22 [µF]
[ms]
[°C]
Overcurrent1 detection time temperature
[°C]
0.22 [µF]
tIOV1 [ms]
[°C]
Seiko Instruments Inc.
3.00 -0.2
+0.3
0.17±0.05
0.2±0.1 0.65
FT008-A-P-SD-1.1
TITLE SCALE UNIT
TSSOP8-E-PKG Dimensions FT008-A-P-SD-1.1
Seiko Instruments Inc.
4.0±0.1 2.0±0.05 0.3±0.05
8.0±0.1
-0.05
+0.1
(4.4)
-0.2
+0.4
Feed direction
FT008-E-C-SD-1.0
TITLE SCALE UNIT
TSSOP8-E-Carrier Tape FT008-E-C-SD-1.0
Seiko Instruments Inc.
13.4±1.0 Enlarged drawing central part 2±0.5 17.5±1.0
FT008-E-R-SD-1.0
TITLE SCALE UNIT
TSSOP8-E-Reel FT008-E-R-SD-1.0
QTY. 3,000
Seiko Instruments Inc.
information described herein subject change without notice. Seiko Instruments Inc. responsible problems caused circuits diagrams described herein whose related industrial properties, patents, other rights belong third parties. application circuit examples explain typical applications products, guarantee success specific mass-production design. When products described herein regulated products subject Wassenaar Arrangement other agreements, they exported without authorization from appropriate governmental authority. information described herein other purposes and/or reproduction copying without express permission Seiko Instruments Inc. strictly prohibited. products described herein cannot used part device equipment affecting human body, such exercise equipment, medical equipment, security systems, equipment, apparatus installed airplanes other vehicles, without prior written permission Seiko Instruments Inc. Although Seiko Instruments Inc. exerts greatest possible effort ensure high quality reliability, failure malfunction semiconductor products occur. user these products should therefore give thorough consideration safety design, including redundancy, fire-prevention measures, malfunction prevention, prevent accidents, fires, community damage that ensue.

S-8232 Series 8232 series lithium-ion lithium-polymer rechargeabl

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