S8209A

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S-8209A Series Usage Guidelines Rev.1.5_00 © Seiko Instruments Inc., 2008-2015 Seiko Instruments Inc. 1 The S-8209A Series is a battery protection IC with the cell-balance function. This application note is a guideline on the typical connecti on examples when using the S-8209A Series for applications. Refer to the datasheet for details and spec of this IC. It is possible to configure the following applications with the S-8209A Series.

• A protection circuit with series multi-cell; 2 cells or more
• A battery protection circuit with cell-balance function
• Protection circuit with S-8209A Series for series multi-cells S-8209A S-8209A S-8209A

S-8209A Series Usage Guidelines Rev.1.5_00 Seiko Instruments Inc. 4 1. 2 Operation Following is about the operation of protection circ uit with S-8209A for seri es multi-cell shown in Figure 1. 1. 2. 1 Normal status Following is about the operation of S-8209A Series in the normal status. The S-8209A goes in the normal status; In the S-8209A (3), The CTLC3, CTLD 3 pins are pulled down to the level of VSS3 pin, BAT3 is more than the overdischarge detection voltage (V DL) and less than the overdischarge detection voltage (V CU). The CO3, DO3 pins get the level of VSS3 pin. In the S-8209A (2), The CTLC2, CTLD2 pins are pulled down to the level of VSS3 pin by the CO3, DO3 pins, BAT2 is more than V DL and less than VCU. The CO2, DO2 pins get the level of VSS2 pin. In the S-8209A (1), The CTLC1, CTLD1 pins are pulled down to the level of VSS2 pin by the CO2, DO2 pins, BAT1 is more than VDL and less than VCU. The CO1, DO1 pins get the level of VSS1 pin. The status of each pin in t he normal status is shown in Table 1. Table 1 CTLC pin CTLD pin Status of battery CO pin DO pin CTLC3 = VSS3 CTLD3 = VSS3 V DL < BAT3 < VCU CO3 = VSS3 DO3 = VSS3 CTLC2 = VSS3 CTLD2 = VSS3 V DL < BAT2 < VCU CO2 = VSS2 DO2 = VSS2 CTLC1 = VSS2 CTLD1 = VSS2 V DL < BAT1 < VCU CO1 = VSS1 DO1 = VSS1 The S-8209A (1) in the normal status turns on the charge control FET (C FET) and the discharge control FET (DFET) via transistors (Q CO, Q DO, N1, N2) externally set to each CO1 and DO1 pin. Therefore it is possible to charge/discharge by a charger or a load connected between P + and P−.

Rev.1.5_00 S-8209A Series Usage Guidelines Seiko Instruments Inc. 5 1. 2. 2 Status to inhibit charge Following is about the status to inhibit charge, for example, the S-8209A (3) detects overcharge, the S-8209A (2) and (1) are in the normal status. The S-8209A (3) goes in the ov ercharge status when BAT3 gets V CU or more by charging. The CO3 pin is set in high impedance. The CTLC2 pin of the S-8209A (2) is pulled up to the le vel of VDD2 pin by the CTLC pin source current (I CTLCH). The CTLC2 pin gets the level of VDD2 pin by the high impedance CO3 pin. Thus the S-8209A (2) goes in the overcharge status after the level of CT LC2 pin gets the CTLC pin H voltage (V CTLCH) or more. The CO2 pin is set in high impedance. The CTLC1 pin of the S-8209A (1) is pulled up to the level of VDD1 pin by I CTLCH as well. The CTLC1 pin gets the level of VDD1 pin by the high impedance CO2 pin. T he S-8209A (1) also goes in the overcharge status after the level of CTLC1 pin gets V CTLCH or more. The status of each pin in this case is shown in Table 2. Table 2 CTLC pin CTLD pin Status of battery CO pin DO pin CTLC3 = VSS3 CTLD3 = VSS3 V CU ≤ BAT3 CO3 = High-Z DO3 = VSS3 CTLC2 = VDD2 CTLD2 = VSS3 V DL < BAT2 < VCU CO2 = High-Z DO2 = VSS2 CTLC1 = VDD1 CTLD1 = VSS2 V DL < BAT1 < VCU CO1 = High-Z DO1 = VSS1 The S-8209A (1) in the overcharge status turns off the CFET via a bipolar transistor (Q CO) set externally to the CO1 pin. In this case, charging via a charger connected between P + and P− is inhibited. By this operation the overcharge status is transmitted fr om the bottom (S-8209A (3)) to the top (S-8209A (1)), from the CO pin to the CTLC pin. Charging is also inhibited; BAT1 or BAT2 gets V CU or more.

S-8209A Series Usage Guidelines Rev.1.5_00 Seiko Instruments Inc. 6 1. 2. 3 Status to inhibit discharge Following is the status to inhibit discharge, for exampl e, the S-8209A (3) detects overdischarge, the S-8209A (2) and (1) are in the normal status. The S-8209A (3) goes in the overdischarge status when BAT3 gets V DL or less by discharging. The DO3 pin is set in high impedance. The CTLD2 pin of the S-8209A (2) is pulled up to the le vel of VDD2 pin by the CTLD pin source current (I CTLDH). The CTLD2 pin gets the level of VDD2 pin by the high impedance DO3 pin. Thus the S-8209A (2) goes in the overdischarge status after the level of CTLD2 pin gets the CTLD pin H voltage (V CTLDH) or more. The DO2 pin is set in high impedance. The CTLD1 pin of the S-8209A (1) is pulled up to the level of VDD1 pin by I CTLDH as well. The CTLD1 pin gets the level of VDD1 pin by the high impedance DO2 pin. T he S-8209A (1) also goes in the overdischarge status after the level of CTLD1 pin gets V CTLDH or more. The status of each pin in this case is shown in Table 3. Table 3 CTLC pin CTLD pin Status of battery CO pin DO pin CTLC3 = VSS3 CTLD3 = VSS3 BAT3 ≤ VDL CO3 = VSS3 DO3 = High-Z CTLC2 = VSS3 CTLD2 = VDD2 V DL < BAT2 < VCU CO2 = VSS2 DO2 = High-Z CTLC1 = VSS2 CTLD1 = VDD1 V DL < BAT1 < VCU CO1 = VSS1 DO1 = High-Z The S-8209A (1) in the overdischarge status turns off the DFET via transistors (Q DO, N1, N2) externally set to the DO1 pin. In this case, discharging to a load connected between P + and P− is inhibited. By this operation the overdischarge status is transmitted from the bottom (S-8209A (3)) to the top (S-8209A (1)), from the DO pin to the CTLD pin. Discharging is also inhibited; BAT1 or BAT2 gets V DL or less.

Rev.1.5_00 S-8209A Series Usage Guidelines Seiko Instruments Inc. 7 1. 2. 4 Charge cell-balance function In Figure 1 , The S-8209A (3) sets the CB3 pin at the leve l of VDD3 pin when BAT3 gets the cell-balance detection voltage (V BU) or more by charging. By this operation, the cell-balance control FET (CBFET3) is turned on so that the cell-balance control FET bypasses the charge current which flows into BAT3. At this point, if BAT1, BAT2 are less than V BU, the speed to charge BAT3 gets slower than to charge BAT1, BAT2. This is the charge cell-balance functi on. Even if any of battery voltages reaches V BU, the cell-balance control FET which corresponds to each battery turns on and the cell-balance is adjusted. The S-8209A Series turns off the cell-balance control FET when the battery voltage decreases to the cell-balance release voltage (V BL) or less by discharging again. Caution If a battery having the voltage V BL or more is included among batteries when composing a protection circuit shown in Figure 1, the cell-balance control FET may turn on immediately after connecting the batteries. 1. 2. 5 Delay circuit Connecting a delay capacitor only to the CDT1 pin of the S-8209A (1), as seen in Figure 1, allows to gain the detection delay time (t DET) and the release delay time (t REL). In detecting by any of batteries, each delay time is the same length. (1) Detection delay time (t DET) BAT3 gets V CU or more by charging, the CTLC2 pin gets the level of VDD2 pin because a capacitor is not connected to the CDT3 pin so that the CO3 pin is se t in high impedance after delay of several hundred μs. After that in the S-8209A (2), the level of CTLC2 pin gets V CTLCH or more, after delay of several hundred μs the CO2 pin is set in high impedance. impedance because connected C CDT to the CDT1 pin. Even if any of batteries detects, by th is operation, users are able to gain the detection delay time almost the same to delay time of t he S-8209A (1), because it defines the whole delay time in the S-8209A Series. (2) Release delay time (t REL) The S-8209A Series also has the release delay time (t REL), and this delay time is set its length as approx. 1/10 of the detection delay time. Connecting a delay capacitor only to the CDT1 pin of the S-8209A (1) allows having the same release delay time, as well as in the detection delay time.

S-8209A Series Usage Guidelines Rev.1.5_00 Seiko Instruments Inc. 8 1. 3 Timing chart 1. 3. 1 Overcharge detection VCU (1) VBU (1) VBL (1) VCL (1) VCU (2) VBU (2) VBL (2) VCL (2) VCU (3) VBU (3) VBL (3) VCL (3) VSS (1) VSS (2) VSS (3) VDD3 VDD2 VDD1 CB3 CB2 CB1 CB2 CB1 CFET gate voltage Charger connection Load connection VDD3 VDD2 VDD1 VSS3 tDET t DET CO3 CO2 CO1 VDD1 VDD2 VDD3 Status to inhibit charge CB3 Normal status tREL tREL Normal status *1. In this period, the discharge current flows via a parasitic diode in the CFET. Figure 2

Rev.1.5_00 S-8209A Series Usage Guidelines Seiko Instruments Inc. 9 1. 3. 2 Overdischarge detection Normal status Status to inhibit discharge Normal status VDD1 VDD2 VDD3 Charger connection Load connection VDD3 VDD2 VDD1 VSS3 DO3 DO2 DO1 DFET gate voltage VSS (1) tDET VDL (1) VDU (1) tREL VSS (2) VDL (2) VDU (2) VSS (3) VDL (3) VDU (3) *1. In this period, the charge current flows via a parasitic diode in the DFET. Figure 3

S-8209A Series Usage Guidelines Rev.1.5_00 Seiko Instruments Inc. 10 1. 4 Demonstration data of charge cell-balance detection The demonstration data shows cell-balance for 3-series lithium ion rechargeable ba ttery using the S-8209AAA. 1. 4. 1 High ratio of bypass current to charge current Charger: a constant current charger (0.05 C = 145 mA) VCU VBU VBL = VCL S-8209AAA charge cell-balance, 0.05 C constant current charger Absolute value of battery voltage [V] 4.2 4.1 4.0 3.9 3.8 0 60 120 180 240 300 360 420 480 Charger connection CB1 CB2 CB3 CFET Gate BAT3 BAT2 BAT1 Cell-balance detection Overcharge detection Time [min.] CBFET1 on CBFET2 on CBFET3 on Figure 4 Test conditions Test circuit: Figure 1 Battery: 3-series cell Lithium ion rechargeable battery, Nominal capacitance: 2.9 Ah, Size: 18650 R PASS: 51 Ω (1 W) → Bypass current = 4.1 V / 51 Ω = 80 mA

Rev.1.5_00 S-8209A Series Usage Guidelines Seiko Instruments Inc. 11 1. 4. 2 Low ratio of bypass current to charge current When the ratio of bypass current to charge current is low, repeating cell-balance cycle enables to adjust cell-balance. Charger: a constant current charger (0.1 C = 290 mA) S-8209AAA charge cell-balance, 0.1 C constant current charger Absolute value of battery voltage [V] 4.2 4.1 4.0 3.9 3.8 0 120 180 240 300 360 420 480 Charger connection Time [min.] BAT3 BAT2 BAT1 VCU VBU VBL = VCL Figure 5 Test conditions Test circuit: Figure 1 Battery: 3-series cell lithium ion rechargeable battery, Nominal capacitance: 2.9 Ah, Size: 18650 R PASS: 51 Ω (1 W) → bypass current = 4.1 V / 51 Ω = 80 mA

S-8209A Series Usage Guidelines Rev.1.5_00 Seiko Instruments Inc. 12 2. Protection circuit with S-8209A Series (with discharge cell-balance function) for series multi-cells 2. 1 Connection example of battery protection IC Setting bipolar transistors (Q CTLD1, QCTLD2) allows adding the function to transmi t the overdischarge status from the top (S-8209A (1)) to the bottom (S-8209A (3)). CFET DFET RCTLD1 QCTLD2 QCTLD1 RCO3 QCO QDO RCO2 RDO3 RDO2 RCO4 RDO4 RCTLC RCTLD RCTLC RCTLD RCTLD0 RCTLC0 RCTLD2 RCTLD3 RCTLD4 RDO1 RDO7 RDO9 RDO8 N1 N2 RVDD CVDD BAT3 CBFET3 RPASS RCB RVDD CVDD BAT2 CBFET2 RPASS RCB RVDD CVDD BAT1 CCDT CBFET1 RPASS RCB RDO6 VSS VDD1 CB1 DO1 CO1 CTLD1 CTLC1 S-8209A(1) CDT1 VSS VDD2 CB2 DO2 CO2 CTLD2 CTLC2 S-8209A(2) CDT2 VSS VDD3 CB3 DO3 CO3 CTLD3 CTLC3 S-8209A(3) CDT3 Remark Refer to “ 5. External components list ” for constants of external components. Figure 6 Caution 1. The above constants may be changed without notice. 2. The example of connection shown above and the constant do not guarantee proper operation. Perform thorough evaluation using the actual application to set the constant.

Rev.1.5_00 S-8209A Series Usage Guidelines Seiko Instruments Inc. 13 2. 2 Operation Following is about the operation of protection circ uit with S-8209A for seri es multi-cell shown in Figure 6. Setting bipolar transistors (Q CTLD1, Q CTLD2) to the circuit in Figure 6 allows adding the function to transmit the overdischarge status from the top (S-8209A (1)) to the bo ttom (S-8209A (3)). By this, even if any IC among the S-8209A (1) to (3) first goes in the overdischarge status, it is possible to turn on all other cell-balance control FETs (CBFET) of the S-8209A Series. Thus cell-balance is certainly adjusted. Following is about the operation in the status to inhibi t discharge, when the S-8209A (2) detects overdischarge, and the S-8209A (1), (3) are in the normal status. 1. The S-8209A (2) goes in the overdischarge status when BAT2 decreases to V DL or less by discharging. The DO2 pin is set in high impedance. 2. The S-8209A (1) also goes in the overdischarge status via the DO2 pin to the CTLD1 pin. 3. The S-8209A (1) turns on the cell-balance control FET (CBFET1) by the discharge cell-balance function. 4. The S-8209A (1) in the overdischarge st atus turns off DFET via a transistor (Q DO, N 1, N 2) and inhibits discharging to a load connected between P + and P−. 5. The P − pin is pulled up by a load connected between P + and P−. 6. Q CTLD1, QCTLD2 are turned off and the CTLD3 pin of the S-8209A (3) is set in high impedance. 7. The S-8209A (3) also goes in the overdischarge status. The cell-balance control FET (CBFET3) turns on by the discharge cell-balance function. As mentioned above, even in case that the S-8209A (2) first detects overdisch arge by voltage drop in BAT2, the overdischarge status is transmitted from the S-8209A (1) to S-8209A (3) via Q CTLD1, QCTLD2. As a result all (1) to (3) of the S-8209A go in the overdischar ge status so that cell-balance is adjusted by the discharge cell-balance function, when each BAT is more than V DL. The cell-balance FET which corresponds to each battery turns off by the voltages of BAT1 to 3 that decreased to V DL or less. And QCTLD1, QCTLD2 are turned on by connecting a charger between P + and P − after inhibit discharging, and the CTLD3 pin is pulled down to the level of VSS3 pin. In this case, the cell-balance co ntrol FET (CBFET3) turns off although the voltage of BAT3 does not reach V DL or less. Caution If a battery having the voltage V BL or more, or a battery having the voltage overdischarge release voltage (VDU) or less is not included among batteries wh en composing a protection circuit shown in Figure 6, the cell-balance control FET may turn on immediately after connecting the battery. To turn off the cell-balance control FET, connect a charger between P + and P−.

S-8209A Series Usage Guidelines Rev.1.5_00 Seiko Instruments Inc. 14 2. 3 Timing chart of overdischarge detection VSS (1) VSS (2) VSS (3) Charger connection Load connection VDD3 VDD2 VDD1 VSS3 tDET DO3 DO2 VDL (3) VDL (2) VDL (1) VDU (3) VDU (2) VDU (1) DO1 Normal status Status to inhibit discharge CB3 CB1 CB3 CB1 tREL tREL DFET gate voltage Normal status VDD1 VDD2 VDD3 *1. In this period, the charge current flows via a parasitic diode in the DFET. Figure 7

Rev.1.5_00 S-8209A Series Usage Guidelines Seiko Instruments Inc. 15 2. 4 Demonstration data of overdischarge cell-balance detection The demonstration data shows cell-balance for 3-series lithium ion rechargeable ba ttery using the S-8209AAA. Time [min.] S-8209AAA discharge cell-balance 2.4 2.5 2.6 2.7 2.8 2.9 3.0 3.1 3.2 3.3 3.4 3.5 0 200 400 600 800 1000 1200 1400 1600 1800 2000 Absolute value of battery voltage [V] Load connection BAT1 BAT2 BAT3 VDU VDL DFET Gate Figure 8 Test conditions Test circuit: Figure 6 Battery: 3-series cell lithium ion rechargeable battery, Nominal capacitance: 2.9 Ah, Size: 18650 R PASS: 51 Ω (1 W) → bypass current = 2.5 V / 51 Ω = 49 mA Load: 100 Ω Battery voltage’s oscillation 1. The cell-balance control FET turns off when the battery voltage decrease to the overdischarge detection voltage DL) or less. 2. Discharge via the cell-balance control FE T stops so that the battery voltage rises. 3. The cell-balance control FET turns on when the battery voltage increases to the overdischarge release voltage (VDU) or more. 4. Discharge via the cell-balance control FE T starts so that the battery voltage falls. Repeating the procedures 1 to 4 enables to adjust cell-balance.

S-8209A Series Usage Guidelines Rev.1.5_00 Seiko Instruments Inc. 16 3. Examples of application circuit added the discharge overcurrent protection function 3. 1 10-series cell protection circuit added the discharge overcurrent protection function (Charge pin and discharge pin are separated, S-8239A Series active "L" product) CO VDD CVDD RVDD RCB RPASSCCDT S-8209A(1) DO CDT CTLC CTLD VSS CB CBFET1 CO VDD RVDD RCB RPASS S-8209A(7) DO CDT CTLC CTLD VSS CB CBFET7 CO VDD RCTLC RCTLC RDO2 RDO3 QDO RCO2 RDO1 RCO4 RDO4 RDO5 RVM RCO1 RDO8 RDO6 RCO3 QCO RCTLC RCTLC RCTLD RCTLC RVDD RCB RPASS S-8209A(6) DO CDT CTLC CTLD VSS CB CBFET6 CO VDD RVDD RCB RPASS S-8209A(8) DO CDT CTLC CTLD VSS CB CBFET8 CO VDD RVDD RCB RPASS S-8209A(9) DO CDT CTLC CTLD VSS CB CBFET9 CO VDD RVDD RCB RPASS S-8209A(10) DO CDT CTLC CTLD VSS CB CBFET10 S-8239A DP VM VDD DO VSS VIN RDO7 DFETCFET Cha Dis N103 N102 N201 P101 R102 R202 R201 C201 RINI RSENSE C101 TB1 TB2 BAT9 BAT10 BAT8 BAT7 BAT6 BAT1 CVDD CVDD RCTLD RCTLD RCTLD RCTLD CVDD CVDD CVDD N101 R101 ZINI Remark Refer to “ 5. External components list ” for constants of external components. Figure 9 Caution 1. The above constants may be changed without notice. 2. The example of connection shown above and the constant do not guarantee proper operation. Perform thorough evaluation using the actual application to set the constant.

Rev.1.5_00 S-8209A Series Usage Guidelines Seiko Instruments Inc. 17 3. 2 10-series cell protection circuit added the discharge overcurrent protection function (Charge pin and discharge pin are separated, S-8239A Series active "H" product) CO VDD CVDD RVDD RCB RPASSCCDT S-8209A(1) DO CDT CTLC CTLD VSS CB CBFET1 CO VDD CVDD RVDD RCB RPASS S-8209A(7) DO CDT CTLC CTLD VSS CB CBFET7 CO VDD CVDD RCTLC RCTLD RCTLC RCTLD RDO2 RDO3 QDO RCO2 RDO1 RCO4 RDO4 RDO5 RVM RCO1 RDO8 RDO6 RCO3 QCO RCTLC RCTLD RCTLC RCTLD RCTLC RCTLD RVDD RCB RPASS S-8209A(6) DO CDT CTLC CTLD VSS CB CBFET6 CO VDD CVDD RVDD RCB RPASS S-8209A(8) DO CDT CTLC CTLD VSS CB CBFET8 CO VDD CVDD RVDD RCB RPASS S-8209A(9) DO CDT CTLC CTLD VSS CB CBFET9 CO VDD CVDD RVDD RCB RPASS S-8209A(10) DO CDT CTLC CTLD VSS CB CBFET10 S-8239A DP VM VDD DO VSS VIN RDO7 DFETCFET Cha Dis N103 N101 N201 R101 R102 R202 R201 C201 RINI RSENSE ZINI C101 TB1 TB2 BAT9 BAT10 BAT8 BAT7 BAT6 BAT1 Remark Refer to “ 5. External components list ” for constants of external components. Figure 10 Caution 1. The above constants may be changed without notice. 2. The example of connection shown above and the constant do not guarantee proper operation. Perform thorough evaluation using the actual application to set the constant.

S-8209A Series Usage Guidelines Rev.1.5_00 Seiko Instruments Inc. 18 4. Example of application circuit In the application that interm ediate pins are connected by connectors as s een in the application circuit below, safety is enhanced since both charge and discharge stop even if the intermediate pins are disconnected. CO1 VDD1 CVDD RVDD RCB RPASS RCO2 RCO3 QCO RDO2 RCTLD4 RCTLD3 QCTLD2 RDO3 QDO CCDT S-8209A(1) DO1 CDT1 CTLC1 CTLD1 VSS1 CB1 CO2 VDD2 CVDD RVDD RCB RPASS S-8209A(2) DO2 CDT2 CTLC2 CTLD2 VSS2 CB2 CO3 VDD3 CVDD RVDD RCB RPASS S-8209A(3) DO3 CDT3 CTLC3 CTLD3 VSS3 CB3 CO4 VDD4 CVDD RVDD RCB RPASS S-8209A(4) DO4 CDT4 CTLC4 CTLD4 VSS4 CB4 CO5 VDD5 CVDD RVDD RCB RPASS S-8209A(5) DO5 CDT5 CTLC5 CTLD5 VSS5 CB5 RCTLC RCTLD RCTLC RCTLD RCTLC RCTLD RCTLC RDO6RDO8RDO1RCO1 RCTLD RCTLD2 RCTLD1 RDO7 RDO9 RDO4 RDO5 RCO4 RCTLC0 QCTLD1 RCTLD0 DFET CFET N2 N1 BAT5 BAT4 BAT3 BAT2 BAT1 CBFET1 CBFET2 CBFET3 CBFET4 CBFET5 Welding or Soldering Connector Welding or Soldering Remark Refer to “ 5. External components list ” for constants of external components. Figure 11

Rev.1.5_00 S-8209A Series Usage Guidelines Seiko Instruments Inc. 19 5. External components list Table 4 shows external components in the connection examples in Figure 1, Figure 6 and Figure 9 to Figure 11. Table 4 (1 / 2) Symbol Typical Unit Components name Maker Remark IC1 to IC10 － － S-8209A Seiko Instruments Inc. Necessary － － － S-8239A*1 Seiko Instruments Inc. Necessary CBFET1 to CBFET10 － － － － User setting CFET － － － － User setting DFET － － － － User setting CCDT － － － － User setting CVDD 0.1 μF GRM188 Murata Manufacturing Co., Ltd. Recommended C101 － － － － User setting,0.1μF min. C201 － － － － User setting,0.1μF min. N1 － － 2SK1590C Renesas Electronics Corporation Recommended N2 － － 2SK1590C Renesas Electronics Corporation Recommended N101 － － 2SK1590C Renesas Electronics Corporation Recommended N102 － － 2SK1590C Renesas Electronics Corporation Recommended N103 － － 2SK1590C Renesas Electronics Corporation Recommended N201 － － 2SK1590C Renesas Electronics Corporation Recommended P101 － － 2SJ210C Renesas Electronics Corporation Recommended QCO PNP － 2SB1198K ROHM CO., LTD. Recommended QDO PNP － 2SB1198K ROHM CO., LTD. Recommended QCTLD1 NPN － 2SC2412K ROHM CO., LTD. Recommended QCTLD2 PNP － 2SB1198K ROHM CO., LTD. Recommended RCB 10 M Ω MCR03 ROHM CO., LTD. Recommended RCO1 RCO2 510 k Ω MCR03 ROHM CO., LTD. Recommended RCO3 1 M Ω MCR03 ROHM CO., LTD. Recommended RCO4 1 M Ω MCR03 ROHM CO., LTD. Recommended RCTLC *3 1 k Ω MCR03 ROHM CO., LTD. Recommended RCTLD *3 1 k Ω MCR03 ROHM CO., LTD. Recommended RCTLC0 1 k Ω MCR03 ROHM CO., LTD. Recommended RCTLD0 1 k Ω MCR03 ROHM CO., LTD. Recommended RCTLD1 1 M Ω MCR03 ROHM CO., LTD. Recommended RCTLD2 4.7 M Ω MCR03 ROHM CO., LTD. Recommended RCTLD3 1 M Ω MCR03 ROHM CO., LTD. Recommended RCTLD4 4.7 M Ω MCR03 ROHM CO., LTD. Recommended RDO1 RDO2 510 k Ω MCR03 ROHM CO., LTD. Recommended RDO3 1 M Ω MCR03 ROHM CO., LTD. Recommended RDO4 1 M Ω MCR03 ROHM CO., LTD. Recommended RDO5 － － － － User setting RDO6 RDO7 1 M Ω MCR03 ROHM CO., LTD. Recommended RDO8 RDO9 1 M Ω MCR03 ROHM CO., LTD. Recommended RINI 1 k Ω MCR03 ROHM CO., LTD. Recommended RPASS RSENSE RVDD 470 Ω MCR03 ROHM CO., LTD. Recommended

S-8209A Series Usage Guidelines Rev.1.5_00 Seiko Instruments Inc. 20 Table 4 (2 / 2) Symbol Typical Unit Components name Maker Remark RVM 5.1 kΩ MCR03 ROHM CO., LTD. Recommended R101 470 Ω MCR03 ROHM CO., LTD. Recommended R102 1 M Ω MCR03 ROHM CO., LTD. Recommended R201 1 k Ω MCR03 ROHM CO., LTD. Recommended R202 100 Ω MCR03 ROHM CO., LTD. Recommended TB1*5 － － － － User setting TB2*5 － － － － User setting ZINI － － MM3Z5V6T1G ON Semiconductor Recommended *1. Select this product according to the overcu rrent detection voltage that you will use. For details, refer to datasheet of S-8239A Series. *2. Set the resistance with attention to VGS rated value of FET. *3. In order to prevent from damage when an overvoltage is applied to the IC, select R CTLC and RCTLD from 0 Ω to 100 kΩ. *4. Pay attention to the rated electric powers. *5. TB : Thermal breaker Caution 1. The above constants may be changed without notice. 2. The example of connection shown above and the constant do not guarantee proper operation. Perform thorough evaluation using the actual application to set the constant. 3. Select external components c onsidering its pressure when confi guring a series protection cell with 5 cells or more.

Rev.1.5_00 S-8209A Series Usage Guidelines Seiko Instruments Inc. 21 6. Precaution

• The usage described in this application note is typical example with our IC. Perform evaluation fully before use.
• When designing for mass production using an application circuit described herein, the product deviation and temperature characteristics of the external components should be taken into consideration. SII shall not bear any responsibility for patent infringements related to products using the circuits described herein.
• SII claims no responsibility for any disputes arising out of or in connection with any infringement by products including this IC of patents owned by a third party. 7. Related source Refer to the following datasheet for details of the S-8209A Series. S-8209A Series Datasheet The information described herein is subject to change without notice. Contact our sales offi ce for details. Regarding the newest version, select product category an d product name on our SII semiconductors website, and download the PDF file. www.sii-ic.com SII semiconductors website

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• The information described herein is subject to change without notice.
• Seiko Instruments Inc. is not responsible for any pr oblems caused by circuits or diagrams described herein whose related industrial properties, patents, or ot her rights belong to third parties. The application circuit examples explain typical applications of the products, and do not guarant ee the success of any specific mass-production design.
• When the products described herein are regulated produ cts subject to the Wassenaar Arrangement or other agreements, they may not be exported without authorization from the appropriate governmental authority.
• Use of the information described he rein for other purposes and/or repr oduction or copying without the express permission of Seiko Instruments Inc. is strictly prohibited.
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• Although Seiko Instruments Inc. exerts the greatest possible effort to ensure high quality and reliability, the failure or malfunction of semiconductor products may oc cur. The user of these products should therefore give thorough consideration to safety design, including redundancy, fire-prevention measures, and malfunction prevention, to prevent any accidents, fires, or community damage that may ensue.