s-8204bad-tct1g

Manufacturer Part Numbers-8204bad-tct1g
DescriptionBattery Protection Ic For 3-series Or 4-series Cell Pack
ManufacturerSeiko Instruments Inc.
s-8204bad-tct1g 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)
• 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)
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.)
(4)
Switchable between 3-series and 4-series cell by using the SEL pin
(5)
Independent charging and discharge control by the control pins
(6)
Withstand voltage element
(7)
Wide range of operation voltage
(8)
Wide range of operation temperature
(9)
Low current consumption
• Operation mode
• Power-down mode
(10) 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-8204B Series includes a voltage detection circuit with
high accuracy and a delay circuit, in single use, makes it
possible for users to monitor the status of 3-series or 4-series
cell lithium-ion rechargeable battery. 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.
By using cascade connection, it is also possible to protect 5-
series or more cells rechargeable lithium-ion battery pack.
3.8 to 4.6 V (50 mV step)
*1
3.6 to 4.6 V
2.0 to 3.0 V (100 mV step)
*2
2.0 to 3.4 V
0.05 to 0.30 V (50 mV step)
0.5 V (fixed)
1.0 V (fixed)
Absolute maximum rating : 24 V
2 to 22 V
−40 to +85°C
µ
33
A max. (+25°C)
µ
0.1
A max. (+25°C)
Drawing Code
Package
Tape
FT016-A
FT016-A
Seiko Instruments Inc.
S-8204B 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-8204bad-tct1g Summary of contents

  • Page 1

    ... Power-down mode (10) Lead-free product *1. Overcharge hysteresis voltage selectable 0 0 step. (Overcharge hysteresis voltage = Overcharge detection voltage − Overcharge release voltage) *2. Overdischarge hysteresis voltage selectable 0 0 100 mV step. ...

  • Page 2

    ... BATTERY PROTECTION IC FOR 3-SERIES OR 4-SERIES CELL PACK S-8204B 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 + − Discharge overcurrent 1 + − Discharge ...

  • Page 3

    ... S-8204BAB-TCT1G 4.350 ± 0.025 V 4.150 ± 0.050 V 2.00 ± 0.080 V 2.70 ± 0.100 V S-8204BAC-TCT1G 4.225 ± 0.025 V 4.075 ± 0.050 V 2.30 ± 0.080 V 3.00 ± 0.100 V S-8204BAD-TCT1G 3.800 ± 0.025 V 3.600 ± 0.050 V 2.00 ± 0.080 V 2.30 ± 0.100 V Remark Please contact our sales office for products with detection voltage values other than those specified above. ...

  • Page 4

    ... FET gate connection pin for discharge control FET (CMOS output) Pin for voltage detection between VSS and VINI Pin for discharge overcurrent detection 1, 2/Pin for short circuit detection voltage Capacitor connection pin for delay for overdischarge detection voltage Capacitor connection pin for delay for overcharge detection voltage ...

  • Page 5

    ... Board size : (2) Board name : JEDEC STANDARD51-7 Caution The absolute maximum ratings are rated values exceeding which the product could suffer physical damage. These values must therefore not be exceeded under any conditions. Figure 3 Power Dissipation of Package (When Mounted on Board) Table 3 ...

  • Page 6

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

  • Page 7

    ... Voltage temperature coefficient 1 : Overcharge detection voltage *2. Voltage temperature coefficient 2 : Discharge overcurrent detection voltage 1 *3. Since products are not screened at high and low temperature, the specification for this temperature range is guaranteed by design, not tested in production. *4. Delay time function is described in “ Operation” in detail. ...

  • Page 8

    ... BATTERY PROTECTION IC FOR 3-SERIES OR 4-SERIES CELL PACK S-8204B Series Test Circuit In this chapter, describing how to test the S-8204B 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 = Current consumption during operation and power-down (Test circuit 1) 1 ...

  • Page 9

    ... SEL Input Voltage “H” (V Start from the initial status, set Confirm the DOP pin is in “L”. After that, decreasing the SEL pin’s voltage gradually, the SEL pin’s voltage when the DOP pin’s voltage is set to “H”; is the SEL input voltage “L” ...

  • Page 10

    ... 1.8 V after the initial status. VMS 5. 3 VC1 Pin Current (I VC1 In the initial status, each current flows in the VC1 pin, VC2 pin, VC3 pin, VC4 pin is the VC1 pin current (I VC2 pin current (I ), the VC3 pin current (I VC2 5. 4 CTLC Pin Current “H” the initial status, a current which flows in the CTLC pin is the CTLC pin current “ ...

  • Page 11

    ... In the initial status, a current which flows in the SEL pin is the SEL pin current “H” (I which flows in the SEL pin when setting COP Pin Source Current (I Start from the initial status, set V current (I ). After that, a current which flows in the COP pin when setting 5 COH V is; the COP pin leakage current ( ...

  • Page 12

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

  • Page 13

    ... BATTERY PROTECTION IC FOR 3-SERIES OR 4-SERIES CELL PACK Rev.1.3 _00 S-8204B 1 COP 16 CTLC A 2 VMP CTLD DOP VDD VINI VC1 13 5 CDT VC2 12 6 CCT VC3 11 7 CIT VC4 10 8 SEL VSS 9 A Figure 7 Test Circuit 4 Seiko Instruments Inc. S-8204B Series ...

  • Page 14

    ... Overcharge Status In the S-8204B Series, any voltage of the batteries increases to the level of V impedance. This is the overcharge status. The COP pin is pulled down to EB− external resistor so that the charge FET is turned off and it stops charging. This overcharge status is released if either condition satisfied; ...

  • Page 15

    ... The discharge overcurrent status is released if the following condition is satisfied. (1) The VMP pin voltage gets Battery Charge Function In this IC, regarding how to charge a discharged battery (0 V battery), users are able to select either function of the two mentioned below. (1) Allow to charge battery (enable to charge battery) ...

  • Page 16

    ... In the S-8204B 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

    ... The S-8204B 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. These controls precede the battery protection circuit. ...

  • Page 18

    ... The overdischarge detection for V4-cell is inhibited by setting the SEL pin “L”, so that short-circuiting the V4 cell does not allow the overdischarge detection. This setting makes it possible to use the S-8204B Series for 3-cell protection. The control by this SEL pin precedes the battery protection circuit. Be sure to use the SEL pin in “H” or “L”. *1. High; SEL ≥ V *2. Low ...

  • Page 19

    ... DD VMP pin voltage 1/2× Charger connection Load connection *1 Status *1. <1> : Normal status <2> : Overcharge status <3> : Overdischarge status Remark The charger is assumed to charge with a constant current. V charger. High-Z Overcharge detection delay time ( <1> <2> Figure 8 Seiko Instruments Inc. S-8204B Series High-Z Overdischarge detection ...

  • Page 20

    ... V V DIOV2 VINI pin voltage V DIOV1 V SS Charger connection Load connection detecion delay time1 (t *1 Status *1. <1> : Normal status <2> : Discharge overcurrent status Remark The charger is assumed to charge with a constant current. V the charger High-Z Discharge overcurrent ) detecion delay time2 (t DIOV1 <1> <2> ...

  • Page 21

    ... BATTERY PROTECTION IC FOR 3-SERIES OR 4-SERIES CELL PACK Rev.1.3 _00 Connection Examples of Battery Protection IC 1. 4-Series Cell (with protect overcurrent function) EB VMP R ATL COP EB − EB− Charging Discharging FET 1 COP 2 VMP 3 DOP 4 VINI S-8204B 5 CDT 6 CCT C CDT 7 CIT C 8 SEL ...

  • Page 22

    ... BATTERY PROTECTION IC FOR 3-SERIES OR 4-SERIES CELL PACK S-8204B Series 2. 7-Series Cell (cascade connection without protect overcurrent function) EB+ R VMP1 R VINI1 R IFC R IFD R VMP2 R VINI2 D COP R DOP R COP EB− Charging Discharging FET FET 22 1 COP 2 VMP 3 DOP 4 VINI S-8204B 5 CDT (1) 6 CCT ...

  • Page 23

    ... BATTERY PROTECTION IC FOR 3-SERIES OR 4-SERIES CELL PACK Rev.1.3 _00 3. 8-Series Cell (cascade connection with protect overcurrent function) EB INV4 R R INV3 INV2 ATL COP R R COP EB − EB− Charging FET 1 COP 2 VMP 3 DOP 4 VINI S-8204B ...

  • Page 24

    ... Contact our sales office in case the constants should be set to other than 47 µF • Ω has not been confirmed whether the operation is normal in circuits other than the above example of connection. In addition, the example of connection shown above and the constants do not guarantee proper operation ...

  • Page 25

    ... Batteries can be connected in any order; however, there may be cases when discharging cannot be performed when a battery is connected. In such a case, short the VMP pin and VDD pin to return the IC to the normal mode. • If both an overcharge battery and an overdischarge battery are included among the whole batteries, the condition is set in overcharge status and overdischarge status. Therefore either charging or discharging is impossible. • ...

  • Page 26

    ... I vs. V OPE 1.3 I vs. V PDN DS 0.10 0.09 0.08 0.07 0.06 0.05 0.04 0.03 0.02 0. Overcharge Detection / Release Voltage, Overdischarge Detection / Release Voltage, Overcurrent Detection Voltage 2 4.375 4.370 4.365 4.360 4.355 4.350 4.345 4.340 4.335 4.330 4.325 −40 −25 2 2.80 2.78 2.76 2.74 2.72 2.70 2.68 2.66 2.64 2.62 2.60 −40 − ...

  • Page 27

    ... BATTERY PROTECTION IC FOR 3-SERIES OR 4-SERIES CELL PACK Rev.1.3 _00 2.5 V vs. V DIOV1 DS 0.29 0.28 0.27 0.26 0.25 0.24 0.23 0.22 0. 2.7 V vs. V DIOV2 DS 0.58 0.56 0.54 0.52 0.50 0.48 0.46 0.44 0. 2.9 V vs. V SHORT DS 1.3 1.2 1.1 1.0 0.9 0 [ [ [V] DS Seiko Instruments Inc. S-8204B Series vs. Ta DIOV1 ...

  • Page 28

    ... BATTERY PROTECTION IC FOR 3-SERIES OR 4-SERIES CELL PACK S-8204B Series 3. CCT pin Resistance / Detection Voltage, CDT pin Resistance / Detection Voltage, CIT pin Resistance / Detection Voltage and Short circuit Detection Voltage Delay Time − CCT 12.0 11.0 10.0 9.0 8.0 7.0 6.0 −40 −25 − CDT 1200 1100 ...

  • Page 29

    ... BATTERY PROTECTION IC FOR 3-SERIES OR 4-SERIES CELL PACK Rev.1.3 _00 4. COP / DOP Pin 4.1 I vs. V COH COP 3.5 4.3 I vs. V DOH DOP 3 [V] COP 4 10 [V] DOP Seiko Instruments Inc. S-8204B Series vs. V COL COP 0.10 0.09 0.08 0.07 0.06 0.05 0.04 0.03 0.02 0.01 0. ...

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  • Page 33

    ... 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 ...