S-8232 Seiko, S-8232 Datasheet

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S-8232

Manufacturer Part Number
S-8232
Description
BATTERY PROTECTION IC
Manufacturer
Seiko
Datasheet

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www.DataSheet4U.com
Rev.5.4
BATTERY PROTECTION IC FOR 2-SERIAL-CELL PACK
(1) Internal high-accuracy voltage detection circuit
(2) High input-voltage device : Absolute maximum ratings 18 V.
(3) Wide operating voltage range : 2 to 16 V
(4) The delay time for every detection can be set via an external capacitor.
(5) Two overcurrent detection levels (Protection for short-circuiting)
(6) Internal auxiliary over voltage detection circuit (Fail-safe for overcharge detection voltage)
(7) Internal charge circuit for 0 V battery (Unavailable is option)
(8) Low current consumption
(9) Lead-free products
• Lithium-ion rechargeable battery packs
• Lithium- polymer rechargeable battery packs
Features
Application
Package
8-Pin TSSOP
• Overcharge detection voltage
• Overcharge release voltage
• Overdischarge detection voltage 1.70 V ± 80 mV to 2.60 V ± 80 mV
• Overdischarge release voltage
• Overcurrent detection voltage 1
• Operation mode
• Power-down mode 0.2 nA typ. 0.1 µA max. (− 40 to + 85 °C)
(Each delay time for Overcharge detection, Overdischarge detection, Overcurrent detection are
“Proportion of hundred to ten to one”.)
(The overcharge release voltage can be selected within the range where a difference from overcharge
detection voltage is 0 to 0.3 V.)
(The overdischarge release voltage can be selected within the range where a difference from
overdischarge detection voltage is 0 to 1.2 V.)
Package Name
_00
7.5 µA typ. 14.2 µA max. (− 40 to + 85 °C)
Package
FT008-A
3.85 V ± 25 mV to 4.60 V ± 25 mV
3.60 V ± 50 mV to 4.60 V ± 50 mV
1.70 V ± 100 mV to 3.80 V ± 100 mV Applicable in 50 mV step
0.07 V ± 20 mV to 0.30 V ± 20 mV
Seiko Instruments Inc.
The 8232 series is a lithium-ion / lithium-polymer
rechargeable battery protection IC incorporating high-
accuracy voltage detection circuit and delay circuit.
The S-8232 series is suitable for 2-cell serial lithium-ion
/ lithium-polymer battery packs.
Drawing Code
FT008-E
Tape
Applicable in 5 mV step
Applicable in 5 mV step
Applicable in 50 mV step
Applicable in 5 mV step
S-8232 Series
FT008-E
Reel
1

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S-8232 Summary of contents

Page 1

... TSSOP The 8232 series is a lithium-ion / lithium-polymer rechargeable battery protection IC incorporating high- accuracy voltage detection circuit and delay circuit. The S-8232 series is suitable for 2-cell serial lithium-ion / lithium-polymer battery packs. 3.85 V ± 4.60 V ± 3.60 V ± 4.60 V ± 1.70 V ± ...

Page 2

... BATTERY PROTECTION IC FOR 2-SERIAL-CELL PACK S-8232 Series Block Diagram VCC SENS VC www.DataSheet4U.com VSS Remark Resistor (RCOL) is connected to the Nch transistor although CO pin serves as a CMOS output. For this, impedance becomes high when outputting “L” from CO pin. Refer to the “ Characteristics ” for the impedance value. ...

Page 3

... V ± S-8232ALFT-T2-G S-8232AMFT-T2-G 4.19 V ± S-8232ANFT-T2-G 4.325 V ± 4.325 V ± S-8232AOFT-T2-G 4.30 V ± 4.28 V ± S-8232APFT-T2-G S-8232ARFT-T2-G 4.325 V ± 4.325 V ± 4.295 V ± S-8232ASFT-T2-G S-8232ATFT-T2-G 4.125 V ± 4.125 V ± S-8232AUFT-T2-G 4.30 V ± 4.30 V ± S-8232AVFT-T2-G S-8232AWFT-T2-G 4.35 V ± ...

Page 4

... S-8232NIFT-T2-G 4.28 V ± S-8232NJFT-T2-G 4.35 V ± S-8232NKFT-T2-G 4.30 V ± S-8232NLFT-T2-G S-8232NMFT-T2-G 4.28 V ± 4.28 V ± S-8232NNFT-T2-G S-8232NOFT-T2-G 4.295 V ± 4.045 V ± 4.25 V ± S-8232NPFT-T2-G 4.25 V ± S-8232NQFT-T2-G 4.15 V ± S-8232NRFT-T2-G 4.15 V ± S-8232NSFT-T2-G S-8232NTFT-T2-G 4.225 V ± 3.85 V ± S-8232NUFT-T2-G ± ...

Page 5

... VSS 6 ICT VCC Seiko Instruments Inc. S-8232 Series Table 3 Description Detection pin for voltage between SENS and VC (Detection for overcharge and overdischarge) FET gate connection pin for discharge control (CMOS output) FET gate connection pin for charge control (CMOS output) ...

Page 6

... BATTERY PROTECTION IC FOR 2-SERIAL-CELL PACK S-8232 Series Absolute Maximum Ratings Item Input voltage between VCC and VSS SENS input pin voltage ICT input pin voltage VM input pin voltage DO output pin voltage CO output pin voltage Power dissipation Operating ambient temperature Storage temperature *1 ...

Page 7

... VSM battery charging V 0CHA function “available” battery charging V function 0INH1, 2 “unavailable” Seiko Instruments Inc. S-8232 Series ( °C unless otherwise specified) Test Min. Typ. Max. Unit Condition CU1, 2 CU1, 2 CU1 − 0.025 + 0 ...

Page 8

... BATTERY PROTECTION IC FOR 2-SERIAL-CELL PACK S-8232 Series Item [DETECTION VOLTAGE] Overcharge detection voltage 1, 2 Auxiliary overcharge detection voltage × 1. CUaux1 CUaux2 CU1 CU2 × 1.11 CUaux1 CUaux2 CU1 CU2 Overcharge release voltage 1, 2 Overdischarge detection voltage 1, 2 Overdischarge release voltage 1, 2 ...

Page 9

... − 1.1 V VSM battery charging V 0CHA function “available” battery charging V function 0INH1, 2 “unavailable” Seiko Instruments Inc. S-8232 Series Test Min. Typ. Max. Unit Condition CU1, 2 CU1, 2 CU1 − 0.055 + 0.045 ...

Page 10

... BATTERY PROTECTION IC FOR 2-SERIAL-CELL PACK S-8232 Series Test Circuits (1) Test Condition 1, Test Circuit 1 Set S1 = OFF 3.6 V, and under normal condition. Increase V1 from 3.6 V gradually. The V1 voltage when CO = “L” is overcharge detection voltage 1 (V voltage when CO = “H” is overcharge release voltage 1 (V when DO = “L” is overdischarge voltage overdischarge release voltage 1 (V condition. Increase V1 from 3.6 V gradually. The V1 voltage when CO = “ ...

Page 11

... BATTERY PROTECTION IC FOR 2-SERIAL-CELL PACK ). CU1 ). DD1 ). CU2 ). DD2 ). 0CHA ). 0INH1 ). 0INH2 Seiko Instruments Inc. S-8232 Series ). CO(H) − 0 CU1 + 0.2 V) until CO goes “L” is the CU1 + 0 DD1 − 0.2 V) until DO goes “L” is the DD1 − 0 CU2 + 0.2 V) until CO goes “L” is the CU2 + 0 DD2 − ...

Page 12

... 0.22 µF C3 ICT VM CO Figure 4 Seiko Instruments Inc. Rev.5.4 SENS I1 VCC S-8232 Series V1 ICT VSS Test Circuit 2 SENS VCC S-8232 Series V1 ICT VSS Test Circuit 4 SENS VCC S-8232 Series V1 ICT VSS DO CO 4.7 MΩ ...

Page 13

... FET turns on and the normal condition returns. CD1 but the charger is removed, a load is placed, and CD1 this condition, the overdischarge condition DU1, 2 Seiko Instruments Inc. S-8232 Series ), and the current flowing through the CU1 longer, the discharging FET is turned off lower and returns IOV1 [V] = 1.11 × ...

Page 14

... BATTERY PROTECTION IC FOR 2-SERIAL-CELL PACK S-8232 Series Delay Circuit The overcharge detection delay time (t overcurrent detection delay time 1 (t determine each delay time, delay times are correlated by the following ratio : Overcharge delay time : Overdischarge delay time : Overcurrent delay time = 100 : The delay times are calculated by the following equations : (Ta = − °C) ...

Page 15

... Remark The charger is assumed to charge with a constant current. www.DataSheet4U.com BATTERY PROTECTION IC FOR 2-SERIAL-CELL PACK V2 battery V1 battery V2 over voltage detect V1 over voltage detect Delay <2> <1> <2> Figure 5 Seiko Instruments Inc. S-8232 Series V1 auxiliary over V2 auxiliary over voltage detect voltage detect Delay time = 0 Delay time = 0 <1> <2> <1> <2> <1> 15 ...

Page 16

... BATTERY PROTECTION IC FOR 2-SERIAL-CELL PACK S-8232 Series 2. Overdischarge Detection Battery V DU voltage pin voltage pin voltage V ss EB− pin IOV2 voltage V IOV1 V SS EB− Charger connection Load connection Delay *1 Mode <1> *1. <1> Normal mode < ...

Page 17

... Load connection *1 Mode *1. <1> Normal mode <2> Over charge mode <3> Over discharge mode <4> Over current mode Remark The charger is assumed to charge with a constant current. www.DataSheet4U.com BATTERY PROTECTION IC FOR 2-SERIAL-CELL PACK battery delay = t delay = t IOV1 <1> <4> Figure 7 Seiko Instruments Inc. S-8232 Series < t IOV2 IOV1 <1> <4> <1> 17 ...

Page 18

... In addition, the example of connection shown above and the constant do not guarantee proper operation. constant kΩ SENS R1 1 kΩ VCC C1 0.22 µ kΩ S-8232 Series VC C2 0.22 µF VSS DO CO FET1 FET2 Figure 8 Table 8 Constants for External Components Purpose Typ. Min. ...

Page 19

... Since voltage difference between two batteries is large in this situation, the S-8232 Series immediately stops the charging of the other battery to reduce voltage difference. This action improves the safety of a battery pack and dose not do any harm to the pack. ...

Page 20

... BATTERY PROTECTION IC FOR 2-SERIAL-CELL PACK S-8232 Series • After the overcurrent detection, the load was connected for a long time, even if one of the battery voltage became lower than overdischarge detection voltage (V long as the load is connected. Therefore the IC’s current consumption at the one of the battery voltage is lower than the overdischarge detection voltage is same as normal condition current consumption (I (refer to the Figure 11 ) ...

Page 21

... Ta [° 4.00 [V] CD1 100 100 Ta [°C] = 5.375 [V] V CUaux1 100 Ta [°C] Seiko Instruments Inc. S-8232 Series Overcharge detection voltage2 vs. temperature V 4.4 4.3 4.2 -40 - [°C] Overcharge release voltage2 vs. temperature V 4.1 4 3.9 -40 - [°C] Auxiliary overcharge detection voltage2 vs. temperature ...

Page 22

... BATTERY PROTECTION IC FOR 2-SERIAL-CELL PACK S-8232 Series Overdischarge detection voltage1 vs. temperature 2.1 2 1.9 -40 -20 0 Overdischarge release voltage1 vs. temperature 2.7 2.6 2.5 -40 -20 0 Overcurrent1 detection voltage vs. temperature 0.12 0.10 www.DataSheet4U.com 0.08 -40 - 2.00 [V] DD1 100 Ta [° 2.60 [V] DU1 100 Ta [° 0.1 [V] IOV1 100 Ta [° ...

Page 23

... BATTERY PROTECTION IC FOR 2-SERIAL-CELL PACK = 7.2 [ 100 C3 = 0.22 [µ 100 Ta [° 0.22 [µ 100 ] Ta [°C Seiko Instruments Inc. S-8232 Series Current consumption vs. temperature in power-down mode V 100 50 0 -40 - [°C] Overcharge detection1 time vs. temperature C3 = 0.22 [µF] 150 100 50 -40 - [° ...

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... Use of the information described herein for other purposes and/or reproduction or copying without the express permission of Seiko Instruments Inc. is strictly prohibited. The products described herein cannot be used as part of any device or equipment affecting the human body, such as exercise equipment, medical equipment, security systems, gas equipment, or any apparatus installed in airplanes and other vehicles, without prior written permission of Seiko Instruments Inc ...

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