EUP9232AAQIR1

EUP9232 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 Highly accurate voltage detector…………...Overcharge detection (Topt=+25°C) Overcharge hysteresis Overdischarge detection Overcurrent 1 detection Variety of detector……………………………Overcharge detection Overcharge hysteresis Overdischarge detection Overdischarge hysteresis Overcurrent 1 detection Overcurrent 2 detection *1 Overcharge release voltage=Over detection voltage-Overcharge hysteresis voltage *2 Overdischarge release voltage = Overdischarge detection voltage-Overdischarge hysteresis voltage. ±25mV ±50mV ±80mV ±20mV 4.25V-4.35V step of 5mV 0.0V-0.4V*1 step of 50mV 2.0V-2.4V step of *2 10mV 0.0V-1V step of 100mV 0.095V-0.3V step of 10mV 0.9V(fixed) High input-voltage device: Absolute maximum ratings 28V Wide operating voltage range :2 to 16V The delay time for every detection can be set via an external capacitor. (Each delay time for Overcharge detection, Overdischarge detection, Overcurent detection are “Proportion of hundred to ten to one”.) Two overcurrent detection levels (Protection for shourt-circuiting) Internal auxiliary over voltage detection circuit (Fall-safe for overcharge detection voltage) Internal charge circuit for 0V battery (Unavailable is option) Low current consumption Operation mode: 5µA typ. 12µA max. (-40 to +85°C) Power-down mode 0.1µA max. (-40 to +85°C) Package: TSSOP-8 RoHS compliant and 100% lead (Pb)-free APPLICATIONS Lithium-ion rechargeable battery packs. DS9232 Ver1.1 Feb. 2007 1 EUP9232 Block Diagram Figure1. Pin Configurations Package Type Pin Configurations TSSOP-8 Pin Description Pin No. 1 2 3 4 5 6 7 8 DS9232 Ver1.1 Symbol SENS DO CO VM VSS ICT VC VCC Feb. 2007 Pin 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) Detection pin for voltage between VM and VSS (Overcurrent detection pin) Negative power input pin Capacitor connection pin for detection delay Middle voltage input pin Positive power input pin 2 EUP9232 Absolute Maximum Ratings Input voltage between VCC and VSS -------------------------------------------------Input pin voltage for VM -------------------------------------------------------------Input pin voltage for SENS and ICT ------------------------------------------------Output pin voltage for CO ------------------------------------------------------------VSS -0.3 V to VSS +18 V VCC -28V to VCC +0.3 V VSS -0.3V to VCC +0.3 V VVM -0.3 V to VCC +0.3 V 300mW Output pin voltage for DO --------------------------------------------------------------- VSS -0.3 V to VCC +0.3 V Power dissipation TSSOP-8---------------------------------------------------------------------------Operating temperature range --------------------------------------------------------------------Storage temperature range ---------------------------------------------------------------------40°C to +85°C -40°C to +125°C Ordering Information Order Number EUP9232AAQIR1 EUP9232ABQIR1 EUP9232ACQIR1 EUP9232ADQIR1 EUP9232AEQIR1 EUP9232AFQIR1 EUP9232AGQIR1 EUP9232AHQIR1 Package Type TSSOP-8 TSSOP-8 TSSOP-8 TSSOP-8 TSSOP-8 TSSOP-8 TSSOP-8 TSSOP-8 Marking XXXX P9232A XXXX P9232B XXXX P9232C XXXX P9232D XXXX P9232E XXXX P9232F XXXX P9232G XXXX P9232H Operating Temperature range -40°C to 85°C -40°C to 85°C -40°C to 85°C -40°C to 85°C -40°C to 85°C -40°C to 85°C -40°C to 85°C -40°C to 85°C EUP9232 □□ □ □ □ □ Lead Free Code 1:Lead Free 0:Lead Packing R: Tape& Reel Operating temperature range I: Industry Standard Package Type Q: TSSOP-8 Model No. DS9232 Ver1.1 Feb. 2007 3 EUP9232 Application Circuit Figure2. Symbol FET1 FET2 R1 C1 R2 C2 R4 C3 R3 Parts Nch MOSFET Nch MOS FET Chip resistor Chip capacitor Chip resistor Chip capacitor Chip resistor Chip capacitor Chip resistor Purpose Discharge control Charge control ESD protection Filter ESD protection Filter ESD protection Delay time setting Protection for charger reverse connection Recommend   1kΩ 0.22 µF 1kΩ 0.22 µF 1 kΩ 0.22 µF 1 kΩ min.   300 Ω 0 µF 300 Ω 0 µF = R1 min. 0 µF 300 Ω max.   1 kΩ 1 µF 1 kΩ 1 µF = R1 max. 1 µF 5 kΩ Remarks       Same value as R1 and R2. *1 Attention should be paid to *2 leak current of C3. 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 (tCU), 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 300Ω 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 4 EUP9232 Product name list 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 Model / No. EUP9232AA EUP9232AB EUP9232AC EUP9232AD EUP9232AE EUP9232AF EUP9232AG EUP9232AH 4.28 V 4.25 V 4.30 V 4.30 V 4.325 V 4.325 V 4.35 V 4.35 V 4.05 V 4.05 V 4.05 V 4.05 V 4.05 V 4.15 V 4.15 V 4.15 V 2.3 V 2.4 V 2.0 V 2.4 V 2.3 V 2.3 V 2.3 V 2.3 V 2.9 V 3.0 V 3.0 V 3.0 V 2.9 V 2.9 V 3.0 V 3.0 V 0.095 V 0.15 V 0.30 V 0.21 V 0.21 V 0.30 V 0.21 V 0.30 V 1.0 s 1.0 s 1.0 s 1.0 s 1.0 s 1.0 s 1.0 s 1.0 s Available Available Available Unavailable Unavailable Unavailable Available Available Note: It is possible to change the detection voltages of the product other than above. For details, please contact our sales office. Detection Voltage Overcharge detection voltage 1,2 Overcharge release voltage 1,2 Overdischarge detection voltage 1,2 Overdischarge release voltage 1,2 Overcurrent detection voltage 1 Symbol VCU1,2 VCD1,2 VDD1,2 VDU1,2 VIOV1 4.25 3.9 2 2.5 0.095 Selection range 4.28 4 2.2 2.8 0.15 4.3 4.325 4.05 2.3 2.9 0.21 4.35 4.15 2.4 3 0.3 Unit V Function 0V battery charge function Selection Available Unavailable DS9232 Ver1.1 Feb. 2007 5 EUP9232 Electrical Characteristics (1) Except detection delay time (25°C) Symbol Detection Voltage VCU1,2 Overcharge detection voltage 1,2 3.90 to 4.60V Adjustable VCU1,2 × 1.25 3.60 to 4.60V Adjustable 1.70 to 2.60V Adjustable 1.70 to 3.80V Adjustable 0.07 to 0.03V Adjustable VCU1,2 -0.025 VCU1,2 VCU1,2 +0.025 V V V V V V V mV/°C mV/°C 1,2 1,2 1,2 1,2 1,2 3 3 ----1 1 1 1 1 1 1 ----- Parameter Condition Min (Ta=25°C unless otherwise specified) Test Test Typ Max Unit Condition Circuit VCUaux1,2 Auxiliary overcharge detection voltage 1,2 VCD1,2 VDD1,2 VDU1,2 VIOV1 VIOV2 TCOE1 TCOE2 Overcharge release voltage 1,2 Overdischarge detection voltage 1,2 Overdischarge release voltage 1,2 Overcurrent detection voltage1 × 1.21 VCU1,2 VCD1,2 -0.050 VDD1,2 -0.080 VDU1,2 -0.100 V IOV1 -0.020 0.5 -0.6 -0.24 VCU1,2 VCU1,2 × 1.25 × 1.29 VCD1,2 VCD1,2 +0.050 VDD1,2 VDD1,2 +0.080 VDU1,2 VDU1,2 +0.100 V IOV1 V IOV1 +0.020 0.9 0 -0.05 1.3 0.6 0 Load short circuit Overcurrent detection voltage 2 Temperature coefficient 1 for detection Ta= -40 to +85°C voltage *1 Temperature coefficient 2 for detection Ta= -40 to +85°C voltage *2 Overcharge detection delay time 1,2 Overdischarge detection delay time1,2 Overcurrent detection delay time 1 Overcuttent detection delay time 2 Operation voltage between VCC and VSS Operation voltage between VCC and VM *3 Current consumption operation during normal 1.0s 0.1s 0.01s Internal circuit operating voltage Internal circuit operating voltage V1=V2=3.6V V1=V2=1.5V Delay Time (C3=0.22µF) tCU1,2 tDD1,2 tIOV1 tIOV2 VDSOP1 VDSOP2 0.7 68 6.7 2.0 2.0 1.00 100 10 220 ----1.4 138 13.9 16 28 s ms ms us V V 8,9 8,9 10 14 ----5 5 5 1 ----- Input Voltage, Operation Voltage Current Consumption IOPE IPDN 5 10 0.1 µA µA 4 4 2 2 Current consumption at power down Output Voltage VDO(H) VDO(L) VCO(H) VCO(L) DO voltage “H” DO voltage “L” CO voltage “H” CO voltage “L” IOUT=10µA IOUT=10µA IOUT=10µA IOUT=10µA VCC -0.05 VSS VCC -0.15 VSS VCC -0.003 VSS +0.003 VCC -0.019 VSS +0.003 VCC VSS +0.05 VCC VSS +0.05 V V V V 6 6 7 7 3 3 4 4 Internal Resistance RVCM RVSM Resistance between VCC and VM Resistance between VSS and VM V1=V2=1.5V VVM=0V V1=V2=3.5V VVM=1.0V 100 50 300 100 900 170 kΩ kΩ 5 5 2 2 DS9232 Ver1.1 Feb. 2007 6 EUP9232 Electrical Characteristics (1) Except detection delay time (25°C) (Ta=25°C unless otherwise specified) Symbol Parameter Condition Min Typ Max Unit Test Test Condition Circuit 0V Battery Charging Function V0CHA V0INH1,2 0V battery charge starting charger voltage 0V battery charge voltage 1,2 inhibition battery 0V battery charging function “available” 0V battery charging function “unavailable” 0.38 0.32 0.75 0.88 1.12 1.44 V V 11 12,13 6 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) Symbol Detection Voltage VCU1,2 Overcharge detection voltage 1,2 3.90 to 4.60V Adjustable VCU1,2 × 1.25 3.60 to 4.60V Adjustable 1.70 to 2.60V Adjustable 1.70 to 3.80V Adjustable 0.07 to 0.03V Adjustable VCU1,2 -0.045 VCU1,2 VCU1,2 +0.040 V V V V V V V mV/°C mV/°C 1,2 1,2 1,2 1,2 1,2 3 3 ----1 1 1 1 1 1 1 ----- Parameter Condition (Ta= -20°C to +70°C unless otherwise specified) Test Test Min Typ Max Unit Condition Circuit VCUaux1,2 Auxiliary overcharge detection voltage 1,2 VCD1,2 VDD1,2 VDU1,2 VIOV1 VIOV2 TCOE1 TCOE2 Overcharge release voltage 1,2 Overdischarge detection voltage 1,2 Overdischarge release voltage 1,2 Overcurrent detection voltage1 × 1.19 VCU1,2 VCD1,2 -0.070 VDD1,2 -0.100 VDU1,2 -0.120 V IOV1 -0.029 0.45 -0.6 -0.24 VCU1,2 VCU1,2 × 1.25 × 1.31 VCD1,2 VCD1,2 +0.065 VDD1,2 VDD1,2 +0.095 VDU1,2 VDU1,2 +0.115 V IOV1 V IOV1 +0.029 0.9 0 -0.05 1.35 0.6 0 Load short circuit Overcurrent detection voltage 2 Temperature coefficient 1 for detection Ta= -40 to +85°C voltage *1 Temperature coefficient 2 for detection Ta= -40 to +85°C voltage *2 Overcharge detection delay time 1,2 Overdischarge detection delay time1,2 Overcurrent detection delay time 1 Overcuttent detection delay time 2 Operation voltage between VCC and VSS Operation voltage between VCC and VM *3 1.0s 0.1s 0.01s Internal circuit operating voltage Internal circuit operating voltage Delay Time (C3=0.22µF) tCU1,2 tDD1,2 tIOV1 tIOV2 VDSOP1 VDSOP2 0.6 67 6.5 2.0 2.0 1.00 100 10 220 ----1.84 140 14.5 16 28 s ms ms us V V 8,9 8,9 10 14 ----5 5 5 1 ----- Input Voltage, Operation Voltage DS9232 Ver1.1 Feb. 2007 7 EUP9232 Electrical Characteristics (2) Except detection delay time (-20°C to +70°C) (Ta= -20°C to +70°C unless otherwise specified) Current Consumption IOPE IPDN Current consumption operation during normal V1=V2=3.6V V1=V2=1.5V 5 11 0.1 µA µA 4 4 2 2 Current consumption at power down Output Voltage VDO(H) VDO(L) VCO(H) VCO(L) DO voltage “H” DO voltage “L” CO voltage “H” CO voltage “L” IOUT=10µA IOUT=10µA IOUT=10µA IOUT=10µA V1=V2=1.5V VVM=0V V1=V2=3.5V VVM=1.0V 0V battery charging function “available” 0V battery charging function “unavailable” VCC -0.14 VSS VCC -0.24 VSS VCC -0.003 VSS +0.003 VCC -0.019 VSS +0.003 300 100 VCC VSS +0.14 VCC VSS +0.14 1200 190 V V V V 6 6 7 7 3 3 4 4 Internal Resistance RVCM RVSM Resistance between VCC and VM Resistance between VSS and VM 83 40 kΩ kΩ 5 5 2 2 0V Battery Charging Function V0CHA V0INH1,2 0V battery charge starting charger voltage 0V battery charge voltage 1,2 inhibition battery 0.29 0.23 0.75 0.88 1.21 1.53 V V 11 12,13 6 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) Symbol Detection Voltage VCU1,2 Overcharge detection voltage 1,2 3.90 to 4.60V Adjustable VCU1,2 × 1.25 3.60 to 4.60V Adjustable 1.70 to 2.60V Adjustable 1.70 to 3.80V Adjustable 0.07 to 0.03V Adjustable VCU1,2 -0.055 VCU1,2 VCU1,2 +0.045 V V V V V V V mV/°C mV/°C 1,2 1,2 1,2 1,2 1,2 3 3 ----1 1 1 1 1 1 1 ----- Parameter Condition (Ta= -40°C to +85°C unless otherwise specified) Test Test Min Typ Max Unit Condition Circuit VCUaux1,2 Auxiliary overcharge detection voltage 1,2 VCD1,2 VDD1,2 VDU1,2 VIOV1 VIOV2 TCOE1 TCOE2 Overcharge release voltage 1,2 Overdischarge detection voltage 1,2 Overdischarge release voltage 1,2 Overcurrent detection voltage1 × 1.19 VCU1,2 VCD1,2 -0.080 VDD1,2 -0.110 VDU1,2 -0.130 V IOV1 -0.033 0.4 -0.6 -0.24 VCU1,2 VCU1,2 × 1.25 × 1.31 VCD1,2 VCD1,2 +0.070 VDD1,2 VDD1,2 +0.100 VDU1,2 VDU1,2 +0.120 V IOV1 V IOV1 +0.033 0.9 0 -0.05 1.4 0.6 0 Load short circuit Overcurrent detection voltage 2 Temperature coefficient 1 for detection Ta= -40 to +85°C voltage *1 Temperature coefficient 2 for detection Ta= -40 to +85°C voltage *2 Feb. 2007 DS9232 Ver1.1 8 EUP9232 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 tDD1,2 tIOV1 tIOV2 VDSOP1 VDSOP2 Overcharge detection delay time 1,2 Overdischarge detection delay time1,2 Overcurrent detection delay time 1 Overcuttent detection delay time 2 Operation voltage between VCC and VSS Operation voltage between VCC and VM *3 Current consumption operation during normal 1.0s 0.1s 0.01s Internal circuit operating voltage Internal circuit operating voltage V1=V2=3.6V V1=V2=1.5V 0.55 67 6.3 2.0 2.0 1.00 100 10 220 ----2.06 141 14.7 16 28 s ms ms us V V 8,9 8,9 10 14 ----5 5 5 1 ----- Input Voltage, Operation Voltage Current Consumption IOPE IPDN 5 12 0.1 µA µA 4 4 2 2 Current consumption at power down Output Voltage VDO(H) VDO(L) VCO(H) VCO(L) DO voltage “H” DO voltage “L” CO voltage “H” CO voltage “L” IOUT=10µA IOUT=10µA IOUT=10µA IOUT=10µA VCC -0.17 VSS VCC -0.27 VSS VCC -0.003 VSS +0.003 VCC -0.019 VSS +0.003 VCC VSS +0.17 VCC VSS +0.17 V V V V 6 6 7 7 3 3 4 4 Internal Resistance RVCM RVSM Resistance between VCC and VM Resistance between VSS and VM V1=V2=1.5V VVM=0V V1=V2=3.5V VVM=1.0V 78 30 300 100 1310 200 kΩ kΩ 5 5 2 2 0V Battery Charging Function V0CHA V0INH1,2 0V battery charge starting charger voltage 0V battery charge voltage 1,2 inhibition battery 0V battery charging function “available” 0V battery charging function “unavailable” 0.26 0.2 0.75 0.88 1.25 1.57 V V 11 12,13 6 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 9 EUP9232 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 (VCU1). Decrease V1 gradually. The V1 voltage when CO = “H” is overcharge release voltage 1(VCD1). Further decrease V1. The V1 voltage when DO= “L” is overdischarge voltage 1(VDD1). Increase V1 gradually. The V1 voltage when DO = “H” is overdischarge release voltage 1 (VDU1). 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 (VCUaux1). (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 (VCU2). 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(VDD2). Increase V2 gradually. The V2 voltage when DO = “H” is overdischarge release voltage 2 (VDU2). 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 (VCUaux2). (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 (VIOV1). 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 (VIOV2). (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 consumption I1 is the power-down current consumption (IPDN). (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). DS9232 Ver1.1 Feb. 2007 (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” (VDOH). 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=10µA is DO voltage “L” (VDOL). (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=10µA is the CO “H” voltage (VCOH). 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” (VCOL). (8) Test Condition 8, Test Circuit 5 Set V1=V2=3.6V and V3=0V under normal condition. Increase V1 from (VCU1-0.2V) to (VCU1+0.2V) immediately (within 10µs). 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 (VDD1+0.2V) to (VDD1-0.2V) immediately (within 10µs). 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 (VCU2-0.2V) to (VCU2+0.2V) immediately (within 10µs). 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 (VDD2+0.2V) to (VDD2-0.2V) immediately (within 10µs). 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 10µs). 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). 10 EUP9232 (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” (VVM+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” (VVM+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 ( tIOV2 ). DS9232 Ver1.1 Feb. 2007 11 EUP9232 Test Circuit Test Circuit 1 Test t Circuit 2 Test Circuit 3 Test Circuit 4 Test Circuit 5 Test Circuit 6 DS9232 Ver1.1 Feb. 2007 12 EUP9232 Typical Characteristics 1. Detection Voltage Temperature Characteristics Overcharge detection voltage1 vs. temperature 4.34 4.32 4.30 Overcharge detection voltage2 vs. temperature 4.34 4.32 4.30 VCU1 (V) 4.28 4.26 4.24 4.22 -40 -20 0 20 40 60 80 VCU2 (V) 4.28 4.26 4.24 4.22 -40 -20 0 20 40 60 80 Ta(°C) Ta(°C) Figure3. Overcharge release voltage1 vs. temperature Figure4. Overcharge release voltage2 vs. temperature 3.96 3.94 3.92 3.96 3.94 3.92 VCD1 (V) 3.90 3.88 3.86 3.84 -40 -20 0 20 40 60 80 VCD2 (V) 3.90 3.88 3.86 3.84 -40 -20 0 20 40 60 80 Ta(°C) Ta(°C) Figure5. Auxiliary overcharge detection voltage1 vs. temperature Figure6. Auxiliary overcharge detection voltage2 vs.temperature 5.41 5.39 5.41 5.39 VCUaux1 (V) VCUaux2 (V) 5.37 5.35 5.33 5.31 5.29 -40 -20 0 20 40 60 80 5.37 5.35 5.33 5.31 5.29 -40 -20 0 20 40 60 80 Ta(°C) Ta(°C) Figure7. Figure8. DS9232 Ver1.1 Feb. 2007 13 EUP9232 Overdischarge detection voltage1 vs. temperature 2.06 2.04 2.02 2.06 2.04 2.02 Overdischarge detection voltage2 vs. temperature VDD1 (V) 2.00 1.98 1.96 1.94 -40 -20 0 20 40 60 80 VDD2 (V) 2.00 1.98 1.96 1.94 -40 -20 0 20 40 60 80 Ta(°C) Ta(°C) Figure 9. Figure10. 2.56 2.54 2.52 Overdischarge release voltage1 vs. temperature 2.56 2.54 2.52 Overdischarge release voltage2 vs. temperature VDU1 (V) 2.50 2.48 2.46 2.44 -40 -20 0 20 40 60 80 VDU2 (V) 2.50 2.48 2.46 2.44 -40 -20 0 20 40 60 80 Ta(°C) Ta(°C) Figure11. Figure12. 0.140 0.125 Overcurrent detection voltage1 vs. temperature Overcurrent detection voltage2 vs. temperature 1.3 1.2 1.1 VIOV1 (V) VIOV2 (V) -20 0 20 40 60 80 0.110 0.095 0.080 0.065 0.050 -40 1.0 0.9 0.8 0.7 0.6 0.5 -40 -20 0 Ta(°C) Ta(°C) 20 40 60 80 Figure13. Figure14. DS9232 Ver1.1 Feb. 2007 14 EUP9232 2. Current Consumption Temperature Characteristics Current consumption vs. temperature in normal mode 10.0 7.5 Current consumption vs. temperature in power-down mode 120 100 80 IOPE (µA) 5.0 IPDN (nA) -20 0 20 40 60 80 60 40 20 2.5 0.0 -40 0 -40 -20 0 20 40 60 80 Ta(°C) Ta(°C) Figure15. 3. Delay Time Temperature Characteristics Figure16. 1.6 1.4 Overcharge detection time vs. tempature TDD (ms) 160 140 120 100 80 60 Overdischarge detection time vs. tempature 1.2 TCU (s) 1.0 0.8 0.6 0.4 -40 -20 0 20 40 60 80 40 -40 -20 0 Ta(°C) Ta(°C) 20 40 60 80 Figure17. Figure18. 16 14 Overcurrent detection1 time vs. tempature TIOV1 (ms) 12 10 8 6 4 -40 -20 0 20 40 60 80 Ta(°C) Figure19. DS9232 Ver1.1 Feb. 2007 15 EUP9232 Description of Operation Normal Condition *1 This IC monitors the voltages of the two serially connected batteries and the discharge current to control charging and discharging. When the voltages of two batteries are in the range from the overdischarge detection voltage (VDD1,2) to the overcharge detection voltage (VCU1,2), 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) , the charging and discharging FETs are turned on. In this 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 value (the VM pin voltage is equal to or higher than the overcurrent detection voltage) during discharging under normal condition and it continues for the overcurrent detection delay time (tIOV) 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 VCC 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 kΩ 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 VSS potential. The IC detects that the VM pin potential returns to overcurrent detection voltage 1 (VIOV1) 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 (VCU1,2) during charging under normal condition and it continues for the overcharge detection delay time (tCU1,2) or longer, the charging FET turns off to stop charging. (2) If one of the battery voltages becomes higher than the auxiliary overcharge detection voltage (VCUaux1, 2) the charging FET turns off immediately to stop charging. The auxiliary overcharge detection voltages (VCUaux1,2) are correlated with the overcharge detection voltages (VCU1,2) and are defined by following equation: VCUaux1,2 [V]=1.25 × VCU1,2 DS9232 Ver1.1 Feb. 2007 The overcharge condition is release in two cases: (1)The battery voltage which exceeded the overcharge detection voltage (VCU1,2) falls below the overcharge release voltage (VCD1, 2), the charging FET turns on and the normal condition returns. (2)If the battery voltage which exceeded the overcharge detection voltage (VCU1, 2) is equal or higher than the overcharge release voltage (VCD1,2), but the charger is removed, a load is placed, and discharging starts, 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 immediately 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 voltage 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 (VDD1,2) during discharging under normal condition and it continues for the overdischarge detection delay time (tDD1, 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 current consumption falls below the power-down current consumption (IPDN). This condition is called the power-down condition. The VM and VCC pins are shorted by the Rvcm resistor under the overdischarge and power-down conditions. The power-down condition is canceled when the charger is connected and 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 (VDU1,2) in this condition, the overdischarge condition changes to the normal condition. 16 Delay Circuits The overcharge detection delay time (tCU1,2), the overdischarge detection delay time (tDD1,2), 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. Overcharge detection delay time tCU [s] = Delay factor (2.5, Typ. 4.545, 0.4545, Max. 9.364) × C3 [µF] 0.6409) 0V Battery Charge Inhibiting Function *2 EUP9232 Overdischarge detection delay time tDD [s] = Delay factor (0.3045, Overcurrent detection delay time tIOV1 [s] = Delay factor × C3 [µF] × C3 [µF] (0.02864, 0.04545, 0.06682) This function is used for inhibiting charging when either of the connected batteries goes 0V due to its self-discharge. When the voltage of either of the connected batteries goes below 0 V charge inhibit voltage 1 and 2 (VOINH1,2), the charging FET gate is fixed to "EB-" to inhibit charging. Charging is possible only when the voltage of both connected batteries goes 0V charge inhibit voltage 1 and 2 (VOINH1, 2) or more. Note that charging may be possible when the total voltage of both connected batteries is less than the minimum value (VDSOPmin) of the operating voltage between VCC and VSS even if the voltage of either of the connected batteries is 0 V charge inhibit voltage 1 and 2 (V0INH1, 2) or less. Charging is prohibited when the total voltage of both connected batteries reaches the minimum value (VDSOPmin) 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. 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 *2 This function is used to recharge both of two serially-connected batteries after they selfdischarge to 0V. When the 0V charging start voltage (V0CHA) 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 (VDU1, 2), the normal condition returns. DS9232 Ver1.1 Feb. 2007 17 EUP9232 Timing Charts 1. Overcharge Detection Figure18. *1. Normal mode. Over charge mode. Over discharge mode. Over current mode. Remark The charger is assumed to charge with a constant current. 2. Overdischarge Detection Figure19. *1. Normal mode. Over charge mode. Over discharge mode. Over current mode. Remark The charger is assumed to charge with a constant current. DS9232 Ver1.1 Feb. 2007 18 EUP9232 3. Overcurrent Detection Figure20. *1. Normal mode. Over charge mode. Over discharge mode. Over current mode. Remark The charger is assumed to charge with a constant current. DS9232 Ver1.1 Feb. 2007 19 EUP9232 Package Information TSSOP-8 SYMBOLS A A1 b D E E1 e L MILLIMETERS MIN. MAX. 1.20 0.00 0.15 0.19 0.30 3.00 6.20 6.60 4.40 0.65 0.45 0.75 INCHES MIN. MAX. 0.048 0.000 0.006 0.007 0.012 0.118 0.244 0.260 0.173 0.026 0.018 0.030 DS9232 Ver1.1 Feb. 2007 20