M62242FP Lithium-Ion Battery Charger Control IC REJ03F0241-0200 Rev.2.00 Sep 14, 2007 Description M62242FP is general purpose battery charger designed for 1-2 cell lithium-ion batteries. Integrating the indispensable circuits for charge control and the interface with MCU *1 allows for protections against over-temperature, over-current, and over-voltage as well as charge control corresponding to the kind of battery by the simplified component design. Note: 1. Recommended MCU: M34501 Features • Built-in accurate reference voltage for full charge detection (4.2 V ± 30 mV accuracy, prepared for 4.1 V battery voltage) • Built-in 5 V power supply for MCU • Using with MCU, various charge flow are available. • Small size 16-pin SSOP package Application Hand held equipments and general battery charger for other digital equipments, etc. Block Diagram OUT 16 VCC SD 4 Constant current control − Charge ON/OFF 1 + 14 HBAT − 13 LBAT 12 VDIF 11 VSENSE 10 TYPE 9 TH 15 GND Aamp + − + Bbuff Constant voltage control VBAT 5 DATA 6 REF 3 + − + + − Cbuff + 5.0 V Reg Logic CADJ 2 REJ03F0241-0200 Rev.2.00 Sep 14, 2007 Page 1 of 8 7 8 S1 S2 M62242FP Pin Arrangement M62242FP SD 1 16 OUT CADJ 2 15 GND REF 3 14 HBAT VCC 4 13 LBAT VBAT 5 12 VDIF DATA 6 11 VSENSE S1 7 10 TYPE S2 8 9 TH (Top view) Outline: PLSP0016JA-A (16P2E-A) Pin Description Pin No. 1 Pin Name SD I/O I 2 CADJ I 3 REF O 4 5 VCC VBAT — O 6 DATA I 7 S1 I 8 S2 O 9 TH I 10 TYPE I 11 VSENSE I 12 VDIF O 13 LBAT I 14 HBAT I 15 16 GND OUT — O Function Charge ON/OFF pin. L: charge on, H: charge off Charge current set pin. Charge current depends on CADJ-pin voltage. For example, • Setting current detection resistance (Rs) = 0.1 Ω • Amplification rate determined by the external resistances = 20 times • CADJ-pin voltage = 1.62 V yields Charge current = 600 mA (1.62 – 0.42 (offset) = 0.1 × Charge current × 20) Reference voltage output pin. REF-pin outputs 5.0 V reference voltage for MCU and other detector. Power supply. Battery voltage output pin. Select pin of DATA output. The output of DATA-pin depends on the conditions of S1, S2-pin. (Noted right figure) Pin name Condition Input S1 S2 L H H L Other Output DATA TYPE TH VDIF Battery temperature input pin. Reference voltage divided by external resistance and thermistor is input to TH-pin. Input pin detecting the kind of battery. Reference voltage divided by resistance detecting the kind of battery and external resistance is input to TYPE-pin. Battery voltage input pin. Charge voltage is controlled by the comparison between half of VSENSE-pin voltage and 2.1 V (inside reference voltage). Charge current detection pin. Amplified differential voltage, between the current detection resistor (Rs), with the amplification ratio set by the external resistor between HBAT and LBAT is output to VDIF terminal. Charge current is controlled by the comparison of VDIF-pin voltage and CADJ-pin voltage. Ground pin Output pin for charge control. Constant voltage/current charge is done by controlling the gate voltage of external PchTr (PNP-Tr). REJ03F0241-0200 Rev.2.00 Sep 14, 2007 Page 2 of 8 M62242FP Absolute Maximum Ratings (Ta = 25°C, VCC = 8 V, unless otherwise noted) Item Supply voltage Symbol Vmax 1 Ratings 16.0 Unit V Power dissipation * Operating temperature Pd Topr 590 –20 to +75 mW °C Storage temperature OUT pin driving current Tstg Idout –40 to +125 50.0 °C mA REF pin output current Iref 10.0 mA Note: 1. This is in the typical condition. (the velocity of the wind is 1 m/s) Power dissipation is changed by materials of the assembled board and the velocity of the wind. Electrical Characteristics (Ta = 25°C, VCC = 8 V, unless otherwise noted) Block Total Aamp Bbuff Cbuff Logic Out Item Symbol Min Typ Max Unit Notes Power supply Circuit current (normal mode) REF-pin referential voltage VCC ICC 5.3 1.0 — 2.0 15.0 3.0 V mA Vref 4.88 5.00 5.12 V Iout = 5 mA Charge control voltage Vchg 4.17 (4.07) 4.20 (4.10) 4.23 (4.13) V 4.2 V battery (4.1 V battery) VDIF-pin output offset voltage H, LBAT-pin input bias current Vdifo — 460 — mV Set at 20 times IhIb — 200 400 nA VDIF-pin output dynamic range VBAT-pin input offset voltage Vdifdr 0.3 — VCC – 0.3 V Vbato –5 0 5 mV VSENSE-pin input bias current VBAT-pin output dynamic range Ivsenseb — –50 –100 nA Vbatdr 1.0 — VCC – 0.3 V DATA-pin input offset voltage TYPE, TH, VDIF-pin Input bias current Vdatao –5 0 5 mV Ittvb — 50 100 nA DATA-pin output dynamic range S1, S2 "H" voltage Vdatadr 0.3 — VCC – 1.0 V Vlogich 1.0 — REF V S1, S2 "L" voltage OUT-pin output low voltage Vlogicl Vout 0 — — — 0.5 0.6 V V REJ03F0241-0200 Rev.2.00 Sep 14, 2007 Page 3 of 8 Same voltage when S1, S2-pin are open. Iout = 30 mA M62242FP Functional Description (Each voltage written in following are set in application example) The value of each timer, over-voltage, low-voltage, over-current and charge full-current etc, are set by MCU. 1. Function of Charging (SD = "L") (1) Detection of the battery connection/the battery temperature. When (S1, S2) = (H, L), TH-pin voltage is output from DATA-pin. TH-pin voltage is used for the detection of the battery connection and battery temperature. MCU recognizes the battery connection and the battery temperature. (Noted table 1.) (2) Detection of the battery type TYPE-pin voltage is detected to recognize a battery type. When (S1, S2) = (L, H), TYPE-pin voltage is output from DATA-pin. The recognition of the battery type by MCU selects the suitable charge flow. (Noted table 1.) Table 1 S1, S2, DATA Function Input Pin name Condition Note: Output S1 L S2 H DATA TYPE H other L TH VDIF DATA outputs 50 µs after S1 and S2 input (3) Detection of battery voltage Since VSENSE-pin voltage (the battery voltage) is always output to VBAT-pin, MCU can always detect the battery voltage. (4) Set and control of the charge current This IC performs the constant charge current function to make CADJ-pin voltage equal to the value. 0.1 Ω × charge current × 20 + offset voltage Detecting the offset voltage by MCU after connecting a battery and revising give highly accurate minute current detection. By changing CADJ-pin voltage after detecting the type, the temperature and the voltage of battery by MCU, the charge current can be set arbitrary. Notes: 0.1 Ω: current detection resistance Rs 20: Amplification rate determined by external resistances connected to HBAT and LBAT-pin (5) Control of charge voltage Charge voltage is controlled by the comparison between the battery voltage and inside reference voltage. (6) The charge completion DATA-pin outputs VDIF-pin voltage (which corresponds to charge current) when (S1, S2) = (L, L) or (H, H). If DATA-pin voltage drops below the charge completion voltage, MCU stops charging. (7) Function of protect In the following condition, MCU stops charging for battery protection by monitoring the VBAT-pin and the DATApin voltage. Example Battery voltage is less than 1.0 V (Low-voltage NG) Battery voltage is more than 4.5 V (Over-voltage NG) Charge current is more than 1.2 A (Over-current NG) Battery temperature is less than –10°C and more than 60°C (Temperature NG) Non-charge completion an hour after charge starts (Charge time up) REJ03F0241-0200 Rev.2.00 Sep 14, 2007 Page 4 of 8 M62242FP 2. Function of Non-charge (SD = "H") In each abnormal states, charge completion state and non-battery state etc, inputting "H" voltage from MCU to SD-pin makes OUT-pin "H" and then the charge function of this IC stops. 3. Function of Recharge VBAT-pin outputs VSENSE-pin voltage continually even after the charge completion. So MCU restarts charging if VSENSE-pin voltage drops below the set voltage by self-discharge etc. REJ03F0241-0200 Rev.2.00 Sep 14, 2007 Page 5 of 8 M62242FP Flow Chart (Noted Equivalent Circuit) <Function of MCU (M34501)> <Function of M62242FP> START DATA ⇐ TH outputs (Detection of battery connection) (S1, S2) = (H, L) LED Red LED Green Condition Charge on off NG on/off off Completion off on Other off off Battery Connection / Temperature No connecting Connecting (S1, S2) = (L, H) DATA ⇐ TYPE outputs (Detection of battery type) TYPE B Battery type TYPE A (S1, S2) = (L, L) (S1, S2) = (L, L) Select resistance B (3.0 kΩ) SD = L (Precharge start) 5 minutes timer start Select resistance B (3.0 kΩ) SD = L (Precharge start) 5 minutes timer start 5 minutes timer OUT "ON" charge start 208 mA charge constant current (Precharge) DATA ⇐ Output TH/VDIF-pin by turns. (Detection of battery temperature/charge current) VBAT ⇐ Output VSENSE-pin voltage (Detection of battery voltage) 5 minutes timer over 5 m L.T. 30 m DATA ⇐ VDIF outputs (Offset revising) over 5 m L.T. 30 m No No VBAT > 2.5 V VBAT > 3.0 V 208 mA 654 or 763 mA Yes Yes Charge current Select resistance D (15 kΩ) SD = L (Quick charge start) 1 hour timer start Select resistance A (12 kΩ) SD = L (Quick charge start) 1 hour timer start 654 mA constant current charge start (Quick charge) 763 mA constant current charge start 208 mA constant current charge (Precharge) No VSENSE = 4.2 V 1 hour timer 1 hour timer over 1 h over 1 h L.T. 1 h L.T. 1 h No No Ichg* < 70 mA 654 or 763 mA constant current charge (Quick charge) Charge current Yes 4.2 V constant current voltage start Ichg* < 50 mA VSENSE-pin voltage SD = H (charge stop) SD = H (charge stop) VBAT < 3.90 V VBAT < 3.95 V OUT = "H" Charge completion Yes Yes Recharge VBAT > 4.5 V or < 1.0 V, Ichg* > 1.2 A Temperature < −10°C or > 60°C Time 4.2 V constant voltage charge Recharge Noted left is always NG SD = H (charge stop) OUT = "H" Charge stop 2.5 V or 3.0 V • DATA-pin outputs TYPE/TH/VDIF-pin voltage by turns. VBAT-pin always outputs VSENSE-pin voltage. • Resistance C (1.5 kΩ) is selected to charge at 109 mA constant current when battery voltage is −10°C to 0°C or 50°C to 60°C. • Charge stops after recognizing abnormal mode when VBAT > 4.5 V, VBAT < 1.0 V, VDIF > 3.6 V (Ichg* > 1.2 A), time up, battery temperature < −10°C or > 60°C. • Each detection is decided after coincidence of 3 reading every 0.1 s. Note Ichg*: Charge current REJ03F0241-0200 Rev.2.00 Sep 14, 2007 Page 6 of 8 VSENSE-pin voltage 4.2 V M62242FP Equivalent Circuit DC 10 kΩ OUT HBAT VCC 10 kΩ VDIF VBAT DATA AD A: 12 kΩ D TH CADJ B C REF TYPE 30 kΩ A B: 3.0 kΩ C: 1.5 kΩ D: 15 kΩ REJ03F0241-0200 Rev.2.00 Sep 14, 2007 Page 7 of 8 200 kΩ VSENSE M62242FP REF VDD MCU (M34501) 0.1 Ω (Rs) LBAT SD AD 200 kΩ Rt S1 S2 GND Rr M62242FP Package Dimensions JEITA Package Code P-LSSOP16-4.4x5-0.65 RENESAS Code PLSP0016JA-A MASS[Typ.] 0.06g 9 E 16 NOTE) 1. DIMENSIONS "*1" AND "*2" DO NOT INCLUDE MOLD FLASH. 2. DIMENSION "*3" DOES NOT INCLUDE TRIM OFFSET. *1 HE Previous Code 16P2E-A F 1 8 Index mark c A2 A1 Reference Symbol *2 A L D *3 e bp y Detail F D E A2 A A1 bp c HE e y L REJ03F0241-0200 Rev.2.00 Sep 14, 2007 Page 8 of 8 Dimension in Millimeters Min 4.9 4.3 Nom Max 5.0 5.1 4.4 4.5 1.15 1.45 0 0.1 0.2 0.17 0.22 0.32 0.13 0.15 0.2 0° 10° 6.2 6.4 6.6 0.53 0.65 0.77 0.10 0.3 0.5 0.7 Sales Strategic Planning Div. Nippon Bldg., 2-6-2, Ohte-machi, Chiyoda-ku, Tokyo 100-0004, Japan Notes: 1. This document is provided for reference purposes only so that Renesas customers may select the appropriate Renesas products for their use. Renesas neither makes warranties or representations with respect to the accuracy or completeness of the information contained in this document nor grants any license to any intellectual property rights or any other rights of Renesas or any third party with respect to the information in this document. 2. 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