EUP9232

EUP9232 EUTECH | Alldatasheet

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DS9232 Ver1.1 Feb. 2007 LI-ION/POLYMER TWO CELL PROTECTOR

DESCRIPTION

The EUP9232 Series are lithium-ion rechargeable battery protection ICs incorporating high-accuracy voltage detection circuits and delay circuits. The EUP9232 Series are suitable for a 2-cell serial lithium- ion battery pack.

FEATURES

z Highly accurate voltage detector…………...Overcharge detection (Topt=+25°C) ±25mV O v e r c h a r g e h y s t e r e s i s ±50mV O v e r d i s c h a r g e d e t e c t i o n ± 8 0 m V O v e r c u r r e n t 1 d e t e c t i o n ±20mV z Variety of detector……………………………O vercharge detection 4.25V-4.35V step of 5mV Overcharge hysteresis 0.0V-0.4V*1 step of 50mV Overdischarge detection 2.0V-2.4V step of 10mV Overdischarge hysteresis 0.0V-1V*2 step of 100mV Overcurrent 1 detection 0.095V-0.3V step of 10mV Overcurrent 2 detection 0.9V(fixed) *1 Overcharge release voltage=Over detection voltage-Overcharge hysteresis voltage *2 Overdischarge release voltage = Overdischarge detection voltage-Overdischarge hysteresis voltage. z High input-voltage device: Absolute maximum ratings 28V z Wide operating voltage range :2 to 16V z The delay time for every detection can be set via an external capacitor. (Each delay time for Overcharge detection, Ov erdischarge detection, Over curent detection are “Proportion of hundred to ten to one”.) z Two overcurrent detection levels (P rotection for shourt-circuiting) z Internal auxiliary over voltage detection circ uit (Fall-safe for overcharge detection voltage) z Internal charge circuit for 0V battery (Unavailable is option) z Low current consumption „ Operation mode: 5µA typ. 12µA max. (-40 to +85°C) „ Power-down mode 0.1µA max. (-40 to +85°C) z Package: TSSOP-8 z RoHS compliant and 100% lead (Pb)-free

APPLICATIONS

z Lithium-ion rechar geable battery packs.

DS9232 Ver1.1 Feb. 2007 Block Diagram Figure1. Pin Configurations Package Type Pin Confi gurations TSSOP-8 Pin Description Pin No. Symbol Pin Description

1 SENS Detection pin for voltage between SENS and VC (Detection for overcharge

and overdischarge)

2 DO FET gate connection pin for discharge control (CMOS output)

3 CO FET gate connection pin for charge control (CMOS output)

4 VM Detection pin for voltage between VM and VSS (Overcurrent detection

pin)

5 VSS Negative power input pin

6 ICT Capacitor connection pin for detection delay

7 VC Middle voltage input pin

8 VCC Positive power input pin

DS9232 Ver1.1 Feb. 2007 Absolute Maximum Ratings

Ordering Information

Order Number Package Type Markin g Operating Temperature range EUP9232AAQIR1 TSSOP-8 XXXX P9232A -40°C to 85°C EUP9232ABQIR1 TSSOP-8 XXXX P9232B -40°C to 85°C EUP9232ACQIR1 TSSOP-8 XXXX P9232C -40°C to 85°C EUP9232ADQIR1 TSSOP-8 XXXX P9232D -40°C to 85°C EUP9232AEQIR1 TSSOP-8 XXXX P9232E -40°C to 85°C EUP9232AFQIR1 TSSOP-8 XXXX P9232F -40°C to 85°C EUP9232AGQIR1 TSSOP-8 XXXX P9232G -40°C to 85°C EUP9232AHQIR1 TSSOP-8 XXXX P9232H -40°C to 85°C Lead Free Code 1:Lead Free 0:Lead P a c k i n g R: Tape& Reel Operating temperature range I: Industry Standard Package Type Q : T S S O P - 8 Model No.

DS9232 Ver1.1 Feb. 2007 Application Circuit Figure2. Symbol Parts Purpose Recommend min. max. Remarks FET1 Nch MOSFET Discharge control     FET2 Nch MOS FET Charge control     R1 Chip resistor ESD protection 1kΩ 300 Ω 1 kΩ  C1 Chip capacitor Filter 0.22 µF 0 µF 1 µF  R2 Chip resistor ESD protection 1kΩ 300 Ω 1 kΩ  C2 Chip capacitor Filter 0.22 µF 0 µF 1 µF  R4 Chip resistor ESD protection 1 kΩ = R1 min. = R1 max. Same value as R1 and R2. *1 Chip capacitor Delay time setting 0.22 µF 0 µF 1 µF Attention should be paid to leak current of C3. *2 Chip resistor Protection for charger reverse connection 1 kΩ 300 Ω 5 kΩ Discharge can’t be stopped at less than 300 Ω when a charger is reverse-connected. *3 *1 R4=R1 is required. Overcharge detection voltage increases by R4. For example 10 kΩ (R4) increases overcharge detection voltage by 20 mV. *2 The overcharge detection delay time (t CU), the overdischarge detection delay time (tDD), and the over current detection delay time (tIOV) change with the external capacitor C3. Refer to the “Electrical Characteristics”. *3 When the resistor R3 is set less than 300 Ω and a charger is reverse-connected, current which exceeds the power dissipation of the package will flow and the IC may break. Caution 1.The above constants may be changed without notice. 2. It has not been confirmed whether the operation is normal or not in circuits other than the above example of connection. In addition, the example of connection shown above and the constant do not guarantee proper operation. Perform through evaluation using the actual application to set the constant.

DS9232 Ver1.1 Feb. 2007 Product name list Model / No. Overcharge detection voltage1,2 [VCU1,VCU2] Overcharge release voltage 1,2 [VCD1,VCD2] Overdischarge detection voltage 1,2 [VDD1,VDD2] Overdischarge release voltage 1,2 [VDU1,VDU2] Overcurrent detection voltage 1 [VIOV1] Overcharge Detection delay time [tCU] C3 = 0.22uF 0V battery charge function Note: It is possible to change the detection voltages of the product other than above. For details, please contact our sales office. Detection Voltage Symbol Selection range Unit Overcharge release voltage 1,2 V CD1,2 3.9 4 4.05 4.15 Overdischarge detection voltage 1,2 V DD1,2 2 2.2 2.3 2.4 Overdischarge release voltage 1,2 V DU1,2 2.5 2.8 2.9 3 Overcurrent detection voltage 1 V IOV1 0.095 0.15 0.21 0.3 V Function Selection 0V battery charge function Available Unavailable

DS9232 Ver1.1 Feb. 2007 Electrical Characteristics (1) Except detection delay time (25°C) (Ta=25°C unless otherwise specified) Symbol Parameter Condition Min Typ Max Unit Test Condition Test Circuit Detection Voltage VCU1,2 Overcharge detection voltage 1,2 3.90 to 4.60V Adjustable VCU1,2 -0.025 VCU1,2 VCU1,2 +0.025 V 1,2 1 VCUaux1,2 Auxiliary overcharge detection voltage 1,2 VCU1,2 ×1.25 VCU1,2 ×1.21 VCU1,2 ×1.25 VCU1,2 ×1.29 V 1,2 1 VCD1,2 Overcharge release voltage 1,2 3.60 to 4.60V Adjustable VCD1,2 -0.050 VCD1,2 VCD1,2 +0.050 V 1,2 1 VDD1,2 Overdischarge detection voltage 1,2 1.70 to 2.60V Adjustable VDD1,2 -0.080 VDD1,2 VDD1,2 +0.080 V 1,2 1 VDU1,2 Overdischarge release voltage 1,2 1.70 to 3.80V Adjustable VDU1,2 -0.100 VDU1,2 VDU1,2 +0.100 V 1,2 1 VIOV1 Overcurrent detection voltage1 0.07 to 0.03V Adjustable V IOV1 -0.020 V IOV1 V IOV1 +0.020 V 3 1 VIOV2 Overcurrent detection voltage 2 Load short circuit 0.5 0.9 1.3 V 3 1 TCOE1 Temperature coefficient 1 for detection voltage *1 Ta= -40 to +85°C -0.6 0 0.6 mV/°C --- --- TCOE2 Temperature coefficient 2 for detection voltage *2 Ta= -40 to +85°C -0.24 -0.05 0 mV/°C --- --- Delay Time (C3=0.22µF) tCU1,2 Overcharge detection delay time 1,2 1.0s 0.7 1.00 1.4 s 8,9 5 tDD1,2 Overdischarge detection delay time1,2 0.1s 68 100 138 ms 8,9 5 tIOV1 Overcurrent detection delay time 1 0.01s 6.7 10 13.9 ms 10 5 tIOV2 Overcuttent detection delay time 2 - - 220 - us 14 1 Input Voltage, Operation Voltage VDSOP1 Operation voltage between VCC and VSS Internal circuit operating voltage 2.0 --- 16 V --- --- VDSOP2 Operation voltage between VCC and VM *3 Internal circuit operating voltage 2.0 --- 28 V --- --- Current Consumption IOPE Current consumption during normal operation V1=V2=3.6V - 5 10 µA 4 2 IPDN Current consumption at power down V1=V2=1.5V - - 0.1 µA 4 2 Output Voltage VDO(H) DO voltage “H” I OUT=10µA VCC -0.05 VCC -0.003 VCC V 6 3 VDO(L) DO voltage “L” I OUT=10µA V SS VSS +0.003 VSS +0.05 V 6 3 VCO(H) CO voltage “H” I OUT=10µA VCC -0.15 VCC -0.019 VCC V 7 4 VCO(L) CO voltage “L” I OUT=10µA V SS VSS +0.003 VSS +0.05 V 7 4 Internal Resistance RVCM Resistance between VCC and VM V1=V2=1.5V VVM=0V 100 300 900 kΩ 5 2 RVSM Resistance between VSS and VM V1=V2=3.5V VVM=1.0V 50 100 170 kΩ 5 2

DS9232 Ver1.1 Feb. 2007 Electrical Characteristics (1) Except detection delay time (25°C) (Ta=25°C unless otherwise specified) Symbol Parameter Condition Min Typ Max Unit Test Condition Test Circuit 0V Battery Charging Function V0CHA 0V battery charge starting charger voltage 0V battery charging function “available” 0.38 0.75 1.12 V 11 6 V0INH1,2 0V battery charge inhibition battery voltage 1,2 0V battery charging function “unavailable” 0.32 0.88 1.44 V 12,13 6 *1. Temperature coefficient 1 for detection voltage should be applied to overcharge detection voltage, overcharge release voltage, overdischarge detection voltage, and overdischarge release voltage. *2. Temperature coefficient 2 for detection voltage should be applied to overcurrent detection voltage. *3. The DO and CO pin logic are established at the operating voltage. Electrical Characteristics (2) Except detection delay time (-20°C to +70°C) (Ta= -20°C to +70°C unless otherwise specified) Symbol Parameter Condition Min Typ Max Unit Test Condition Test Circuit Detection Voltage VCU1,2 Overcharge detection voltage 1,2 3.90 to 4.60V Adjustable VCU1,2 -0.045 VCU1,2 VCU1,2 +0.040 V 1,2 1 VCUaux1,2 Auxiliary overcharge detection voltage 1,2 VCU1,2 ×1.25 VCU1,2 ×1.19 VCU1,2 ×1.25 VCU1,2 ×1.31 V 1,2 1 VCD1,2 Overcharge release voltage 1,2 3.60 to 4.60V Adjustable VCD1,2 -0.070 VCD1,2 VCD1,2 +0.065 V 1,2 1 VDD1,2 Overdischarge detection voltage 1,2 1.70 to 2.60V Adjustable VDD1,2 -0.100 VDD1,2 VDD1,2 +0.095 V 1,2 1 VDU1,2 Overdischarge release voltage 1,2 1.70 to 3.80V Adjustable VDU1,2 -0.120 VDU1,2 VDU1,2 +0.115 V 1,2 1 VIOV1 Overcurrent detection voltage1 0.07 to 0.03V Adjustable V IOV1 -0.029 V IOV1 V IOV1 +0.029 V 3 1 VIOV2 Overcurrent detection voltage 2 Load short circuit 0.45 0.9 1.35 V 3 1 TCOE1 Temperature coefficient 1 for detection voltage *1 Ta= -40 to +85°C -0.6 0 0.6 mV/°C --- --- TCOE2 Temperature coefficient 2 for detection voltage *2 Ta= -40 to +85°C -0.24 -0.05 0 mV/°C --- --- Delay Time (C3=0.22µF) tCU1,2 Overcharge detection delay time 1,2 1.0s 0.6 1.00 1.84 s 8,9 5 tDD1,2 Overdischarge detection delay time1,2 0.1s 67 100 140 ms 8,9 5 tIOV1 Overcurrent detection delay time 1 0.01s 6.5 10 14.5 ms 10 5 tIOV2 Overcuttent detection delay time 2 - - 220 - us 14 1 Input Voltage, Operation Voltage VDSOP1 Operation voltage between VCC and VSS Internal circuit operating voltage 2.0 --- 16 V --- --- VDSOP2 Operation voltage between VCC and VM *3 Internal circuit operating voltage 2.0 --- 28 V --- ---

DS9232 Ver1.1 Feb. 2007 Electrical Characteristics (2) Except detection delay time (-20°C to +70°C) (Ta= -20°C to +70°C unless otherwise specified) Current Consumption IOPE Current consumption during normal operation V1=V2=3.6V - 5 11 µA 4 2 IPDN Current consumption at power down V1=V2=1.5V - - 0.1 µA 4 2 Output Voltage VDO(H) DO voltage “H” I OUT=10µA VCC -0.14 VCC -0.003 VCC V 6 3 VDO(L) DO voltage “L” I OUT=10µA V SS VSS +0.003 VSS +0.14 V 6 3 VCO(H) CO voltage “H” I OUT=10µA VCC -0.24 VCC -0.019 VCC V 7 4 VCO(L) CO voltage “L” I OUT=10µA V SS VSS +0.003 VSS +0.14 V 7 4 Internal Resistance RVCM Resistance between VCC and VM V1=V2=1.5V VVM=0V 83 300 1200 kΩ 5 2 RVSM Resistance between VSS and VM V1=V2=3.5V VVM=1.0V 40 100 190 kΩ 5 2 0V Battery Charging Function V0CHA 0V battery charge starting charger voltage 0V battery charging function “available” 0.29 0.75 1.21 V 11 6 V0INH1,2 0V battery charge inhibition battery voltage 1,2 0V battery charging function “unavailable” 0.23 0.88 1.53 V 12,13 6 *1. Temperature coefficient 1 for detection voltage should be applied to overcharge detection voltage, overcharge release voltage, overdischarge detection voltage, and overdischarge release voltage. *2. Temperature coefficient 2 for detection voltage should be applied to overcurrent detection voltage. *3. The DO and CO pin logic are established at the operating voltage. Electrical Characteristics (3) Except detection delay time (-40°C to +85°C) (Ta= -40°C to +85°C unless otherwise specified) Symbol Parameter Condition Min Typ Max Unit Test Condition Test Circuit Detection Voltage VCU1,2 Overcharge detection voltage 1,2 3.90 to 4.60V Adjustable VCU1,2 -0.055 VCU1,2 VCU1,2 +0.045 V 1,2 1 VCUaux1,2 Auxiliary overcharge detection voltage 1,2 VCU1,2 ×1.25 VCU1,2 ×1.19 VCU1,2 ×1.25 VCU1,2 ×1.31 V 1,2 1 VCD1,2 Overcharge release voltage 1,2 3.60 to 4.60V Adjustable VCD1,2 -0.080 VCD1,2 VCD1,2 +0.070 V 1,2 1 VDD1,2 Overdischarge detection voltage 1,2 1.70 to 2.60V Adjustable VDD1,2 -0.110 VDD1,2 VDD1,2 +0.100 V 1,2 1 VDU1,2 Overdischarge release voltage 1,2 1.70 to 3.80V Adjustable VDU1,2 -0.130 VDU1,2 VDU1,2 +0.120 V 1,2 1 VIOV1 Overcurrent detection voltage1 0.07 to 0.03V Adjustable V IOV1 -0.033 V IOV1 V IOV1 +0.033 V 3 1 VIOV2 Overcurrent detection voltage 2 Load short circuit 0.4 0.9 1.4 V 3 1 TCOE1 Temperature coefficient 1 for detection voltage *1 Ta= -40 to +85°C -0.6 0 0.6 mV/°C --- --- TCOE2 Temperature coefficient 2 for detection voltage *2 Ta= -40 to +85°C -0.24 -0.05 0 mV/°C --- ---

DS9232 Ver1.1 Feb. 2007 Electrical Characteristics (3) Except detection delay time (-40°C to +85°C) (Ta= -40°C to +85°C unless otherwise specified) Delay Time (C3=0.22µF) tCU1,2 Overcharge detection delay time 1,2 1.0s 0.55 1.00 2.06 s 8,9 5 tDD1,2 Overdischarge detection delay time1,2 0.1s 67 100 141 ms 8,9 5 tIOV1 Overcurrent detection delay time 1 0.01s 6.3 10 14.7 ms 10 5 tIOV2 Overcuttent detection delay time 2 - - 220 - us 14 1 Input Voltage, Operation Voltage VDSOP1 Operation voltage between VCC and VSS Internal circuit operating voltage 2.0 --- 16 V --- --- VDSOP2 Operation voltage between VCC and VM *3 Internal circuit operating voltage 2.0 --- 28 V --- --- Current Consumption IOPE Current consumption during normal operation V1=V2=3.6V - 5 12 µA 4 2 IPDN Current consumption at power down V1=V2=1.5V - - 0.1 µA 4 2 Output Voltage VDO(H) DO voltage “H” I OUT=10µA VCC -0.17 VCC -0.003 VCC V 6 3 VDO(L) DO voltage “L” I OUT=10µA V SS VSS +0.003 VSS +0.17 V 6 3 VCO(H) CO voltage “H” I OUT=10µA VCC -0.27 VCC -0.019 VCC V 7 4 VCO(L) CO voltage “L” I OUT=10µA V SS VSS +0.003 VSS +0.17 V 7 4 Internal Resistance RVCM Resistance between VCC and VM V1=V2=1.5V VVM=0V 78 300 1310 kΩ 5 2 RVSM Resistance between VSS and VM V1=V2=3.5V VVM=1.0V 30 100 200 kΩ 5 2 0V Battery Charging Function V0CHA 0V battery charge starting charger voltage 0V battery charging function “available” 0.26 0.75 1.25 V 11 6 V0INH1,2 0V battery charge inhibition battery voltage 1,2 0V battery charging function “unavailable” 0.2 0.88 1.57 V 12,13 6 *1. Temperature coefficient 1 for detection voltage should be applied to overcharge detection voltage, overcharge release voltage, overdischarge detection voltage, and overdischarge release voltage. *2. Temperature coefficient 2 for detection voltage should be applied to overcurrent detection voltage. *3. The DO and CO pin logic are established at the operating voltage.

DS9232 Ver1.1 Feb. 2007 TEST Circuits (1) Test Condition 1, Test Circuit 1 Set S1=OFF, V1= V2 =3.6 V, and V3= 0 V under normal condition. Increase V1 from 3.6V gradually. The V1 voltage when CO = “L” is overcharge detection voltage 1 (V CU1). Decrease V1 gradually. The V1 voltage when CO = “H” is overcharge release voltage 1(V CD1). Further decrease V1. The V1 voltage when DO= “L” is overdischarge voltage 1(V DD1). Increase V1 gradually. The V1 voltage when DO = “H” is overdischarge release voltage 1 (V DU1). Set S1 = ON, and V1= V2= 3.6 V and V3 = 0 V under normal condition. Increase V1 from 3.6V gradually. The V1 voltage when CO = “L” is auxiliary overcharge detection voltage 1 (V CUaux1). (2) Test Condition 2, Test Circuit 1 Set S1=OFF, V1= V2 =3.6 V, and V3= 0V under normal condition. Increase V2 from 3.6V gradually. The V2 voltage when CO = “L” is overcharge detection voltage 2 (V CU2). Decrease V2 gradually. The V2 voltage when CO = “H” is overcharge release voltage 2(VCD2). Further decrease V2. The V2 voltage when DO= “L” is overdischarge voltage 2(V DD2). Increase V2 gradually. The V2 voltage when DO = “H” is overdischarge release voltage 2 (V DU2). Set S1 = ON, and V1= V2= 3.6 V and V3 = 0 V under normal condition. Increase V2 from 3.6V gradually. The V2 voltage when CO = “L” is auxiliary overcharge detection voltage 2 (V CUaux2). (3) Test Condition 3, Test Circuit 1 Set S1=OFF, V1 =V2 =3.6 V, and V3 = 0V under normal condition. Increase V3 from 0V gradually. The V3 voltage when DO= “L” is overcurrent detection voltage 1 (V IOV1). Set S1 =ON, V1=V2= 3.6V, V3=0 under normal condition. Increase V3 from 0 V gradually.V3 voltage when DO= “L” is overcurrent detection voltage 2 (V IOV2). (4) Test Condition 4, Test Circuit 2 Set S1 = ON, V1 = V2 =3.6V, and V3 =0 V under normal condition and measure current consumption. Current consumption I1 is the normal condition current consumption (IOPE). Set S1 =OFF, V1 =V2 =1.5V under overdischarge condition and measure current consumption. Current c onsumption I1 is the power-down current consumption (I PDN). (5) Test Condition 5, Test Circuit 2 Set S1 =ON, V1=V2 = 1.5 V, and V3 =0 V under overdischarge condition. (V1+ V2)/I2 is the internal resistance between VCC and VM (Rvcm). Set S1= ON, V1=V2=3.5V, and V3 = 1.0 V under overcurrent condition. V3 / I2 is the internal resistance between VSS and VM (Rvsm). (6) Test Condition 6, Test Circuit 3 Set S1=ON, S2=OFF,V1=V2=3.6V, and V3 =0 V under normal condition. Increase V4 from 0V gradually. The V4 voltage when I1=10µA is DO voltage “H” (V DOH). Set S1=OFF, S2=ON,V1=V2=3.6V, and V3=0.5 V under overcurrent condition. Increase V5 from 0V gradually. The V5 voltage when I2=10 µA is DO voltage “L” (V DOL). (7) Test Condition 7, Test Circuit 4 Set S1 = ON, S2=OFF, V1=V2 =3.6V, and V3 =0 V under normal condition. Increase V4 from 0V gradually. The V4 voltage when I1=10 µA is the CO “H” voltage COH). Set S1=OFF, S2=ON,V1=4.4, V2 =3.6V, and V3 =0 V under overcharge condition. Increase V4 from 0V gradually. The V5 voltage when I1=10µA is CO voltage “L” (V COL). (8) Test Condition 8, Test Circuit 5 Set V1=V2=3.6V and V3=0V under normal condition. Increase V1 from (V CU1-0.2V) to (V CU1+0.2V) immediately (within 10 µs). The time after V1 becomes (VCU1+0.2V) until CO goes “L” is the overcharge detection delay time 1 (tCU1). Set V1=V2=3.5V and V3=0V under normal condition. Decrease V1 from (V DD1+0.2V) to (V DD1-0.2V) immediately (within 10 µs). The time after V1 becomes (VDD1-0.2V) until DO goes “L” is the overcharge detection delay time 1 (tDD1). (9) Test Condition 9, Test Circuit 5 Set V1=V2=3.6V and V3=0V under normal condition. Increase V2 from (V CU2-0.2V) to (V CU2+0.2V) immediately (within 10 µs). The time after V2 becomes (VCU2+0.2V) until CO goes “L” is the overcharge detection delay time 2 (tCU2). Set V1=V2=3.6V and V3=0V under normal condition. Decrease V2 from (V DD2+0.2V) to (V DD2-0.2V) immediately (within 10 µs). The time after V2 becomes (VDD2-0.2V) until DO goes “L” is the overcharge detection delay time 2 (tDD2). (10) Test Condition 10, Test Circuit 5 Set V1=V2=3.6V and V3=0V under normal condition. Increase V3 from 0V to 0.5V immediately(within 10 µs). The time after V3 becomes 0.5V until DO goes “L” is the overcurrent detection delay time 1(tI0V1). (11) Test Condition 11, Test Circuit 6 Set V1=V2=0V and V3=2V,and decrease V3 gradually. The V3 voltage when CO=”L”(VCC-0.3V or lower) is the 0V charge starting voltage (V0CHA).

DS9232 Ver1.1 Feb. 2007 (12) Test Condition 12, Test Circuit 6 Set V1=0V and V2=3.6V and V3=12V, and Increase V1 gradually. The V1 voltage when CO=”H” (V VM+0.3V or higher) is the 0V charge inhibiting voltage 1(V0INH1). (13) Test Condition 13, Test Circuit 6 Set V1=3.6V and V2=0V and V3=12V, and Increase V2 gradually. The V2 voltage when CO=”H” (V VM+0.3V or higher) is the 0V charge inhibiting voltage 2(V0INH2). (14) Test Condition 14, Test Circuit 1 Set S1=ON, V1=V2=3.6V and V3=0V under normal condition. Increase V3 from 0V to 1.5V immediately ( within 10 us ). The time after DO goes “L” is the overcurrent detection delay time 2 ( t IOV2 ).

DS9232 Ver1.1 Feb. 2007 Test Circuit T e s t C i r c u i t 1 T e s t t C i r c u i t 2 T e s t C i r c u i t 3 T e s t C i r c u i t 4 T e s t C i r c u i t 5 T e s t C i r c u i t 6

DS9232 Ver1.1 Feb. 2007 Typical Characteristics 1. Detection Voltage Temperature Characteristics - 4 0 - 2 00 2 04 06 08 04.22 4.24 4.26 4.28 4.30 4.32 4.34 Overcharge detection voltage1 vs. temperature VCU1 (V) Ta(°C) - 4 0 - 2 00 2 04 06 08 0 4.22 4.24 4.26 4.28 4.30 4.32 4.34 Overcharge detection voltage2 vs. temperature VCU2 (V) Ta(°C) Figure3. Figure4. - 4 0 - 2 00 2 04 06 08 0 3.84 3.86 3.88 3.90 3.92 3.94 3.96 Overcharge release voltage1 vs. temperature VCD1 (V) Ta(°C) - 4 0 - 2 00 2 04 06 08 0 3.84 3.86 3.88 3.90 3.92 3.94 3.96 Overcharge release voltage2 vs. temperature VCD2 (V) Ta(°C) Figure5. Figure6. - 4 0 - 2 00 2 04 06 08 0 5.29 5.31 5.33 5.35 5.37 5.39 5.41 Auxiliary overcharge detection voltage1 vs. temperature VCUaux1 (V) Ta(°C) - 4 0 - 2 00 2 04 06 08 0 5.29 5.31 5.33 5.35 5.37 5.39 5.41 Auxiliary overcharge detection voltage2 vs.temperature VCUaux2 (V) Ta(°C) Figure7. Figure8.

Overdischarge detection voltage1 vs. Overdischarge detection voltage2 vs. Figure 9. Figure10. Overdischarge release voltage1 vs. Overdischarge release voltage2 vs. Overcurrent detection voltage1 vs. Overcurrent detection voltage2 vs.

DS9232 Ver1.1 Feb. 2007 2. Current Consumption Temperature Characteristics - 4 0 - 2 00 2 04 06 08 0 0.0 2.5 5.0 7.5 10.0 Current consumption vs. temperature in normal mode IOPE (µA) Ta(°C) - 4 0 - 2 00 2 04 06 08 00 100 120 Current consumption vs. temperature in power-down mode IPDN (nA) Ta(°C) Figure15. Figure16. 3. Delay Time Temperature Characteristics - 4 0 - 2 00 2 04 06 08 0 0.4 0.6 0.8 1.0 1.2 1.4 1.6 Overcharge detection time vs. tempature TCU (s) Ta(°C) - 4 0 - 2 00 2 04 06 08 0 100 120 140 160 Overdischarge detection time vs. tempature TDD (ms) Ta(°C) Figure17. Figure18. - 4 0 - 2 00 2 04 06 08 0 Overcurrent detection1 time vs. tempature TIOV1 (ms) Ta(°C) Figure19.

DS9232 Ver1.1 Feb. 2007 Description of Operation Normal Condition *1 This IC monitors the volt ages of the two serially connected batteries and t he discharge current to control charging and discharging. When the voltages of two batteries are in the range from the overdischarge detection voltage (V DD1,2) to the overcharge detection voltage (V CU1,2), and the current flowing through the batteries becomes equal or lower than a specified value (the VM pin voltage is equal or lower than overcurrent detection voltage 1) , t he charging and discharging FETs are turned on. In th is condition, charging and discharging can be carried out freely. This condition is called normal condition. Overcurrent Condition When the discharging current becomes equal to or higher than a specified val ue (the VM pin voltage is equal to or higher than the overcurrent detection voltage) during discharging under normal condition and it continues for the ov ercurrent detection delay time (t IOV) or longer, the discharging FET is turned off to stop discharging. This condition is called overcurrent condition. When the discharging FET is off and a load is connected, the VM pin voltage equals the V CC potential. The overcurrent condition returns to the normal condition when the load is released and the impedance between the EB - and EB + pins (refer to the Figure 2 for a connection example) is 400 k Ω or higher. When the load is released, the VM pin, which is shorted to the VSS pin with the Rvsm resistor, goes back to the V SS potential. The IC detects that the VM pin potential returns to overcurrent detection voltage 1 (V IOV1) or lower and returns to the normal condition. Overcharge Condition Following two cases are detected as overcharge conditions: (1) If one of the battery voltages becomes higher than the overcharge detection voltage (V CU1,2) during charging under normal condition and it continues for the overch arge detection delay time CU1,2) or longer, the charging FET turns off to stop charging. (2) If one of the battery voltages becomes higher than the auxiliary over charge detection voltage (VCUaux1, 2) the charging FET turns off immediately to stop charging. The auxiliary overchar ge detection voltages (VCUaux1,2) are correlated with the overcharge detection voltages (V CU1,2) and are defined by following equation: VCUaux1,2 [V]=1.25×VCU1,2 The overcharge condition is release in two cases: (1)The battery voltage which exceeded the overcharge detection voltage (V CU1,2) falls below the overcharge release voltage (V CD1, 2 ), the charging FET turns on and the normal condition returns. (2)If the battery voltage which exceeded the overcharge detection voltage (V CU1, 2) is equal or higher than the overcharge release voltage CD1,2), but the charger is removed, a load is placed, and discharging star ts, the charging FET turns on and the normal condition returns. The release mechanism is as follows: the discharge current flows through an internal parasitic diode of the charging FET immediat ely after a load is installed and discharging starts, and the VM pin voltage increases by about 0.6 V from the VSS pin voltage momentarily. The IC detects this voltage (overcurrent detection volt age 1 or higher), releases the overcharge condition and returns to the normal condition. Overdischarge Condition If any one of the battery voltages falls below the overdischarge detection voltage (V DD1,2) during discharging under normal c ondition and it continues for the overdischarge detection delay time (t DD1, 2) or longer, the discharging FET turns off and discharging stops. This condition is called the overdischarge condition. When the discharging FET turns off, the VM pin voltage becomes equal to the VCC voltage and the IC’s cu rrent consumption falls below the power-down cu rrent consumption (I PDN). This condition is called the power-down condition. The VM and VCC pins are shorted by the R vcm resistor under the overdischarge and power-down conditions. The power-down condition is canceled when the charger is connected an d the voltage between VM and VCC is overcurrent detection voltage 2 or higher. When all the battery voltages becomes equal to or higher than the overdischarge release voltage (V DU1,2) in this condition, the overdischarge condition changes to the normal condition.

DS9232 Ver1.1 Feb. 2007 Delay Circuits The overcharge detection delay time (t CU1,2), the overdischarge detection delay time (t DD1,2), and the overcurrent detection delay time1 (tI0V1) change with an external capacitor (C3). Since one capacitor determine each delay time, delay times are correlated by the following ratio: Overcharge delay time: Overdischarge delay time : Overcurrent delay time =100:10:1 The delay times are calculated by the following equations : (Ta=-40 to +85℃) Min. Typ. Max. Overcharge detection delay time tCU [s] = Delay factor (2.5, 4.545, 9.364) ×C3 [µF] Overdischarge detection delay time tDD [s] = Delay factor (0.3045, 0.4545, 0.6409) ×C3 [µF] Overcurrent detection delay time tIOV1 [s] = Delay factor (0.02864, 0.04545, 0.06682) ×C3 [µF] Remark The delay time for overcurrent detection 2 is fixed by an internal circuit. The delay time cannot be changed via an external capacitor. 0V Battery Charging Function This function is used to recharge both of two serially-connected batteri es after they self- discharge to 0V. When the 0V charging start voltage (V 0CHA) or higher is applied to between VM and VCC by connecting the charger, the charging FET gate is fixed to VCC potential. When the voltage between the gate and the source of the charging FET becomes equal to or higher than the turn-on voltage by the charger voltage, the charging FET turns on to start charging. At this time, the discharging FET turns off and the charging current flows through the internal parasitic diode in the discharging FET. If all the battery voltages become equal to or higher than the overdischarge release voltage (V DU1, 2), the normal condition returns. 0V Battery Charge Inhibiting Function This function is used for inhibiting charging when either of the c onnected batteries goes 0V due to its self-discharge. When the vo ltage of either of the connected batteries goes bel ow 0 V charge inhibit voltage 1 and 2 (V OINH1,2), the charging FET gate is fixed to "EB- " to inhibit charging. Charging is possible only when the vo ltage of both connected batteries goes 0V c harge inhibit voltage 1 and 2 (V OINH1, 2 ) or more. Note that charging may be possible when the total voltage of both connected batteries is less than the minimum value (V DSOPmin) of the operating voltage between VCC and VSS even if the voltage of ei ther of the connected batteries is 0 V charge inhibit voltage 1 and 2 0INH1, 2) or less. Charging is prohibited when the total voltage of both connected batteries reaches the minimum value (V DSOPmin) of the operating voltage between VCC and VSS. *1. When initially connecting batteries, the IC may fail to enter the normal condition (discharging ready state).If so, once set the VM pin to VSS voltage (short pins VM and VSS or connect a charger). *2.Some lithium ion batteries are not recommended to be recharged after having been completely discharged. Please contact the battery manufacturer when you decide to select a 0V battery charging function.

DS9232 Ver1.1 Feb. 2007 Timing Charts 1. Overcharge Detection Figure18. Remark The charger is assumed to charge with a constant current. 2. Overdischarge Detection Figure19. Remark The charger is assumed to charge with a constant current.

DS9232 Ver1.1 Feb. 2007 3. Overcurrent Detection Figure20. Remark The charger is assumed to charge with a constant current.

DS9232 Ver1.1 Feb. 2007

Package Information

MILLIMETERS INCHES SYMBOLS MIN. MAX. MIN. MAX. A - 1.20 - 0.048 A1 0.00 0.15 0.000 0.006 b 0.19 0.30 0.007 0.012 D 3.00 0.118 E 6.20 6.60 0.244 0.260 E1 4.40 0.173 e 0.65 0.026 L 0.45 0.75 0.018 0.030