s-8204a

Manufacturer Part Numbers-8204a
DescriptionBattery Protection Ic For 3-series Or 4-series Cell Pack
ManufacturerSeiko Instruments Inc.
s-8204a datasheet
 


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Rev.1.3
_00
BATTERY PROTECTION IC
FOR 3-SERIES OR 4-SERIES CELL PACK
Features
(1) High-accuracy voltage detection for each cell
• Overcharge detection voltage n (n = 1 to 4)
• Overcharge release voltage n (n = 1 to 4)
• Overdischarge detection voltage n (n = 1 to 4) 2.0 to 3.0 V (100 mV step)
• Overdischarge release voltage n (n = 1 to 4)
(2) Discharge overcurrent detection in 3-step
• Discharge overcurrent detection voltage 1
• Discharge overcurrent detection voltage 2
• Short circuit detection voltage
(3) Charge overcurrent detection
• Charge overcurrent detection voltage
(4) Settable by external capacitor; Overcharge detection delay time, Overdischarge detection delay time,
Discharge overcurrent detection delay time 1, Discharge overcurrent detection delay time 2
(Short circuit detection voltage delay time is internally fixed.)
(5) Switchable between 3-series and 4-series cell by using the SEL pin
(6) Independent charging and discharge control by the control pins
(7) Withstand voltage element
(8) Wide range of operation voltage
(9) Wide range of operation temperature
(10) Low current consumption
• Operation mode
• Power-down mode
(11) Lead-free product
*1. Overcharge hysteresis voltage n (n = 1 to 4) is selectable in 0 V, or in 0.1 V to 0.4 V in 50 mV step.
(Overcharge hysteresis voltage = Overcharge detection voltage − Overcharge release voltage)
*2. Overdischarge hysteresis voltage n (n = 1 to 4) is selectable in 0 V, or in 0.2 V to 0.7 V in 100 mV
step.
(Overdischarge hysteresis voltage = Overdischarge release voltage − Overdischarge detection voltage)
Applications
• Rechargeable lithium-ion battery packs
Package
Package Name
16-Pin TSSOP
The S-8204A Series is a protection IC for 3-series or 4-
series cell rechargeable lithium-ion battery, and
includes a voltage detection circuit with high accuracy
and a delay circuit.
By switching the voltage level which is applied to the
SEL pin, users are able to use this IC either for 3-
series or 4-series cell pack.
3.9 to 4.6 V (50 mV step)
*1
3.8 to 4.6 V
*2
2.0 to 3.4 V
0.05 to 0.25 V (50 mV step)
0.5 V (fixed)
1.0 V (fixed)
−0.25 to −0.05 V (50 mV step) Accuracy ±30 mV
Absolute maximum rating : 24 V
2 to 22 V
−40 to +85°C
33 µA max. (+25°C)
0.1 µA max. (+25°C)
Drawing Code
Package
Tape
FT016-A
FT016-A
Seiko Instruments Inc.
S-8204A Series
Accuracy ±25 mV
Accuracy ±50 mV
Accuracy ±80 mV
Accuracy ±100 mV
Accuracy ±15 mV
Accuracy ±100 mV
Accuracy ±300 mV
Reel
FT016-A
1

s-8204a Summary of contents

  • Page 1

    ... Rechargeable lithium-ion battery packs Package Package Name 16-Pin TSSOP The S-8204A Series is a protection IC for 3-series or 4- series cell rechargeable lithium-ion battery, and includes a voltage detection circuit with high accuracy and a delay circuit. By switching the voltage level which is applied to the SEL pin, users are able to use this IC either for 3- series or 4-series cell pack ...

  • Page 2

    ... BATTERY PROTECTION IC FOR 3-SERIES OR 4-SERIES CELL PACK S-8204A Series Block Diagram COP R VMD VMP R VMS DOP VINI CDT CCT CIT SEL Remark Diodes in the figure are parasitic diodes. 2 Control circuit Delay circuit Delay circuit Delay circuit Delay circuit + − Discharge overcurrent 1 + − ...

  • Page 3

    ... Sequentially set from Table 1 Overdischarge Overdischarge Detection Voltage Release Voltage 2.00 ± 0.080 V 2.70 ± 0.100 V 2.70 ± 0.080 V 2.90 ± 0.100 V Seiko Instruments Inc. S-8204A Series *2 Discharge Charge Overcurrent Overcurrent Detection Voltage 1 Detection Voltage DIOV1 CIOV 0.25 ± 0.015 V −0.10 ± 0.030 V 0.25 ± 0.015 V − ...

  • Page 4

    ... BATTERY PROTECTION IC FOR 3-SERIES OR 4-SERIES CELL PACK S-8204A Series Pin Configuration COP VMP DOP VINI CDT CCT CIT SEL Pin No. Symbol 1 COP 2 VMP 3 DOP 4 VINI 5 CDT 6 CCT 7 CIT 8 SEL 9 VSS 10 VC4 11 VC3 12 VC2 13 VC1 14 VDD 15 CTLD 16 CTLC 4 16-Pin TSSOP Top view ...

  • Page 5

    ... D  T opr  T stg 1200 1000 800 600 400 200 100 Ambient Temperature Ta (°C) Seiko Instruments Inc. S-8204A Series (Ta = 25°C unless otherwise specified) Absolute Maximum Ratings −0 + −0 +0 −0 + −0 +0.3 ...

  • Page 6

    ... BATTERY PROTECTION IC FOR 3-SERIES OR 4-SERIES CELL PACK S-8204A Series Electrical Characteristics Item [ DETECTION VOLTAGE ] Overcharge detection voltage Overcharge release voltage Overdischarge detection voltage Overdischarge release voltage Discharge overcurrent detection ...

  • Page 7

    ... COH COP 0.5 V COL COP SS I − 0 DOH DOP 0.5 V DOL DOP SS Seiko Instruments Inc. S-8204A Series (Ta = 25°C unless otherwise specified) Min. Typ. Max. Unit    0.91 V   0.59 V   0.91 V 0.59    ...

  • Page 8

    ... BATTERY PROTECTION IC FOR 3-SERIES OR 4-SERIES CELL PACK S-8204A Series Test Circuit In this chapter, describing how to test the S-8204A Series. In case of selecting to use it for 4-series cell battery, set SEL pin = V level. For 3-series cell battery, set SEL pin = V DD VC4 pin. 1. Current consumption during operation and power-down (Test circuit 1) 1 ...

  • Page 9

    ... CIT1 DS CIT1 CIT1 max. + 0.05 V from the initial status. ) CIT2 ) CIT2 CIT2 DS CIT2 CIT2 max. + 0.05 V from the initial status. Seiko Instruments Inc. S-8204A Series ) CTLCL ) CTLDL ) SELL ). SELH = VMP SEL DD VINI CTLC is the current which flows from the CCT pin ...

  • Page 10

    ... BATTERY PROTECTION IC FOR 3-SERIES OR 4-SERIES CELL PACK S-8204A Series 3. 5 CCT pin Detection Voltage (V The CCT pin detection voltage (V × 0 more) after increasing the CCT pin’s voltage gradually, after setting “H” (voltage V DS 4.7 V from the initial state. ...

  • Page 11

    ... V, a current which flows in the COP pin is the COP pin COP SS COH ), DOP Pin Sink Current (I DOH = current which flows in the DOP pin is the DOP pin DOP SS Seiko Instruments Inc. S-8204A Series ) can be defined VMS DS ), VC4 Pin Current (I VC3 ), the VC4 pin current (I VC3 ) CTLCL ...

  • Page 12

    ... BATTERY PROTECTION IC FOR 3-SERIES OR 4-SERIES CELL PACK S-8204A Series S-8204A 1 COP CTLC 2 VMP CTLD VDD 3 DOP VC1 4 VINI VC2 5 CDT 6 CCT VC3 7 CIT VC4 8 SEL VSS Figure 4 Test Circuit 1 S-8204A 1 COP CTLC 16 2 VMP CTLD 15 3 DOP 14 VDD ...

  • Page 13

    ... A 2 VMP 15 CTLD A VDD 14 3 DOP 4 VINI VC1 13 5 CDT VC2 12 6 CCT VC3 11 7 CIT VC4 SEL 9 VSS Figure 8 Test Circuit 5 Seiko Instruments Inc. S-8204A Series 0.1 µ ...

  • Page 14

    ... The VMP pin voltage Power-down Status In the S-8204A Series, when it reaches the overcharge status, the VMP pin is pulled down to the resistor between VMP and VSS pin (R less, almost every circuit in the S-8204A stops working so that the current consumption decreases to the level of current consumption at power down (I the COP pin is set in high impedance ...

  • Page 15

    ... The VMP pin voltage gets V 6. Charge Overcurrent Status In the S-8204A Series, in batteries in the normal status, the charge current increases more than a certain value result, if the status in which the VINI pin voltage decreases to the level of V COP pin is set in high impedance. This is the charge overcurrent status. The charge control FET is turned off and it stops discharging ...

  • Page 16

    ... S-8204A Series 8. Delay Time Setting In the S-8204A Series, users are able to set delay time for the period; from detecting any voltage of the batteries or detecting changes in the voltage at the VINI pin, to the output to the COP, DOP pin. Each delay time is determined by a resistor in the IC and an external capacitor. ...

  • Page 17

    ... CTLC and CTLD Pins The S-8204A Series has two pins to control. The CTLC pin controls the output voltage from the COP pin, the CTLD pin controls the output voltage from the DOP pin. Thus it is possible for users to control the output voltages from the COP pin and DOP pin independently ...

  • Page 18

    ... BATTERY PROTECTION IC FOR 3-SERIES OR 4-SERIES CELL PACK S-8204A Series Timing Chart 1. Overcharge Detection and Overdischarge Detection V CUn V CLn Battery voltage V DLn ( DOP pin voltage EB+ COP pin voltage EB 39/40×V DD VMP pin voltage 1/2× ...

  • Page 19

    ... Remark The charger is assumed to charge with a constant current. V the charger High-Z Discharge overcurrent Discharge overcurrent detection delay time DIOV1 <1> <2> Figure 10 Seiko Instruments Inc. S-8204A Series High-Z High-Z Short circuit detection voltage delay time (t ) DIOV2 <1> <2> <1> <2> indicates the open voltage of EB+ ) SHORT <1> ...

  • Page 20

    ... BATTERY PROTECTION IC FOR 3-SERIES OR 4-SERIES CELL PACK S-8204A Series 3. Charge Overcurrent Detection V CUn V CLn Battery voltage V DUn V DLn ( DOP pin voltage EB+ COP pin voltage EB VMP pin voltage VINI pin voltage V DIOV1 ...

  • Page 21

    ... VMP 15 CTLD 3 DOP 14 VDD 4 VINI VC1 13 5 CDT VC2 12 6 CCT VC3 11 7 CIT VC4 10 C CIT 8 SEL VSS Figure 13 Seiko Instruments Inc. S-8204A Series R CTLC R CTLD C R VC1 VC1 C R VC2 VC2 C R VC3 VC3 R VC4 C 9 VSS R SEL R VSS ...

  • Page 22

    ... BATTERY PROTECTION IC FOR 3-SERIES OR 4-SERIES CELL PACK S-8204A Series No. Symbol DOP 6 R COP 7 R VMP 8 R CTLC 9 R CTLD SENSE CCT 19 C CDT *1. Set up a filter constant × ...

  • Page 23

    ... [ [ [°C] 2 [°C] Seiko Instruments Inc. S-8204A Series vs. Ta OPE −40 − [°C] vs. Ta PDN 0.10 0.09 0.08 0.07 0.06 0.05 0.04 0.03 0.02 0.01 0.00 −40 − [°C] vs 4.20 4.18 4.16 4.14 4.12 4.10 −40 − ...

  • Page 24

    ... BATTERY PROTECTION IC FOR 3-SERIES OR 4-SERIES CELL PACK S-8204A Series 2.5 V vs. V DIOV1 DS 0.30 0.29 0.28 0.27 0.26 0.25 0.24 0.23 0.22 0.21 0. 2.7 V vs. V DIOV2 DS 0.60 0.58 0.56 0.54 0.52 0.50 0.48 0.46 0.44 0.42 0. 2.9 V vs. V SHORT DS 1.3 1.2 1.1 1.0 0.9 0.8 0 2.11 V vs. V CIOV DS −0.05 −0.06 −0.07 −0.08 −0.09 −0.10 −0.11 −0.12 −0.13 −0.14 −0. 2 [ ...

  • Page 25

    ... [° [° [° [°C] Seiko Instruments Inc. S-8204A Series − 15.2 V) CCT DS 10.9 10.8 10.7 10.6 10.5 10.4 −40 − [°C] − 12.0 V) CDT DS 10.0 9.9 9.8 9.7 9.6 −40 − [°C] − ...

  • Page 26

    ... BATTERY PROTECTION IC FOR 3-SERIES OR 4-SERIES CELL PACK S-8204A Series 4. COP / DOP Pin 4.1 I vs. V COH COP 0.10 0.09 0.08 0.07 0.06 0.05 0.04 0.03 0.02 0.01 0. 4.3 I vs. V DOH DOP 5.0 4.5 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0 1 [V] COP 4.4 I 3.6 5.4 7.2 V [V] DOP Seiko Instruments Inc. vs. V COL COP 3 [V] COP vs. V DOL ...

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  • Page 30

    ... 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 ...