M62253BGP Charge Control IC for Li-Ion Batteries REJ03F0243-0200 Rev.2.00 Sep 14, 2007 Description M62253BGP is a charge control IC dedicated to Lithium-ion batteries. Constant current/voltage charging suitable for Li-Ion batteries are available by utilizing on-chip current/voltage control circuits. It also includes charge inhibit function for over discharged battery and charge control function detecting battery temperature, allowing for easy configuration of Li-Ion battery charging circuit. Features • • • • • • • • • Available for 4.2 V battery High precision reference voltage 4.2 V ± 30 mV Constant current and constant voltage charging Charge completion detection voltage settable by external resistors Charging inhibit and protection function for over discharged battery Charging inhibit and protection function for both high and low temperature battery Dual LED indications monitoring charging status Recharging function (LED2 remains turned on after recharging) Delay circuit to prevent erroneous detection Applications Li-Ion battery charger for hand-held instruments such as cellular phones and notebook computers Block Diagram VDD C1 VCC Regulated supply 4.53 V 4.2 V + − − OE 4.1 V⇔3.99 V + ISENSE+ ISET Erroneous detection prevention + OE + − VSET SENSE+ ISENSE- − 3.07 V OUT OUT Constant current control OUT SENSE− Constant voltage control VSENSE VSENSE 1.54 V Erroneous detection prevention Current detection LED2 ADJ − + Erroneous detection prevention LED1 GND REJ03F0243-0200 Rev.2.00 Sep 14, 2007 Page 1 of 12 C3 − + C2 1.49 V TIN 3.21 V M62253BGP Pin Arrangement M62253BGP TIN 1 16 OUT C3 2 15 SENSE+ ADJ 3 14 SENSE− VDD 4 13 VSENSE VCC 5 12 GND NC 6 11 NC LED1 7 10 C2 LED2 8 9 C1 (Top view) Outline: PLSP0016JA-A (16P2E-A) Pin Description Pin No. Pin Name Function 1 2 TIN C3 Temperature sensing input (also battery connecting detection input) Delay time setting for temperature sensing (Tpd = 49 ms @ 0.1µF) 3 ADJ 4 VDD Charge completion detection voltage setting (One fifth of ADJ terminal voltage is equal to charge completion detection voltage.) Reference voltage output VDD = 4.53 V 5 7, 8 VCC LED1, 2 9 C1 Power supply LED driver outputs (opened collector) LED1 for during charge, LED2 for completion of charge Delay time setting for voltage sensing (Tpd = 1.06 s @ 2.2 µF) 10 12 C2 GND Delay time setting for current sensing (Tpd = 1.15 s @ 2.2 µF) Ground 13 14 VSENSE SENSE– Battery output voltage sensing input Charging current sensing input (connect to lower voltage node) 15 16 SENSE+ OUT Charging current sensing input (connect to higher voltage node) Charger output (opened collector) Absolute Maximum Ratings (Ta = 25°C, unless otherwise noted) Item Supply voltage Symbol VCC Ratings 16 Unit V Output current Applying voltage to SENSE pin IOUT VSENSE 30 VCC mA V Applying voltage to TIN pin Power dissipation VTIN Pd VCC 300 V mW Thermal derating Operating temperature Kθ Topr 3.0 –20 to +85 mW/°C °C Storage temperature Tstg –40 to +125 °C REJ03F0243-0200 Rev.2.00 Sep 14, 2007 Page 2 of 12 Condition Ta = 25°C Ta > 25°C M62253BGP Electrical Characteristics (VCC = 12.0 V, VSENSE = 3.6 V, Ta = 25°C, unless otherwise noted) Blocks All device Item Supply voltage Symbol VCC Min 5.0 Typ — Max 15.0 Unit V VDD Current consumption VDD output voltage ICC VDD — 4.30 7 4.53 — 4.76 mA V Voltage detection Charge start voltage Quick charge start voltage VTHchgon VTHqchgon 1.44 2.97 1.54 3.07 1.64 3.17 V V Output voltage setting Recharge start voltage Vochg VTHrchgon 4.17 3.89 4.20 3.99 4.23 4.09 V V VSENSE terminal input current Charging current setting voltage 1 linVSENSE ISET1 –2.0 15 — 26 2.0 37 µA mV 1.56 V < battery V. < 3.07 V Charging current setting voltage 2 ISET2 232 256 280 mV 5.0 V < VCC < 8.0 V 237 256 275 mV 8.0 V < VCC < 15.0 V Current detection Condition LED is off During a charge At charge completion 3.07 V < battery V. < 4.2 V 3.07 V < battery V. < 4.2 V Charge completion detecting voltage ITHchgoff 15 26 37 mV Vadj = 0.13 V Charge completion detecting voltage Input current into SENSE+ pin ITHchgoff 75 100 125 mV Vadj = 0.5 V IINSENSE+ — 60 85 µA During a charge IINSENSE– — 60 85 µA During a charge LED Input current into SENSE– pin LED1 pin saturation voltage VOHLED1 — — 0.4 V ILED1 = 10 mA TIN LED2 pin saturation voltage TIN pin upper threshold voltage 1 VOHLED2 VTHINTH1 — 3.11 — 3.21 0.4 3.31 V V ILED2 = 10 mA VDD = 4.53 V TIN pin lower threshold voltage 1 TIN pin upper threshold voltage 2 VTHINTL1 VTHINTH2 1.39 3.13 1.49 3.23 1.59 3.33 V V TIN pin lower threshold voltage 2 Input current into TIN pin VTHINTL2 IinTIN 1.49 –1.0 1.59 — 1.69 — V µA OUT Output pin saturation voltage Output pin leak current VOHOUT ILOUT — — 1.0 — 2.0 1.0 V µA C1 Delay time for voltage detection Connect/disconnect detection time1 tdC1 0.76 1.06 1.36 s At recharge C1 = 2.2 µF tdBDET1 0.82 1.15 1.48 s Delay time for current detection tdIDET 0.82 1.15 1.48 s 4.2 V con. voltage output period C2 = 2.2 µF C2 = 2.2 µF Delay time for LED switch over Discharging time tdILED 1.56 2.21 2.86 s C2 = 2.2 µF tdchg 30 90 — ms tdC3 34 49 64 ms C2 C3 Delay time for temperature detection REJ03F0243-0200 Rev.2.00 Sep 14, 2007 Page 3 of 12 IOUT = 20 mA VOUT = 15 V C2 = 2.2 µF (after current detection) C3 = 0.1 µF M62253BGP Functional Description (1) Detection of connection/disconnection of battery Connection/disconnection of battery is detected via TIN pin. The detection is performed by external resistor and thermistor using the regulated 4.53 V of VDD terminal. When TIN terminal voltage is between 1.49 V and 3.21 V, battery is confirmed to be connected according to the internal setting. When TIN terminal voltage is 1.49 V or less, or 3.21 V or more, charge is inhibited owing to possibilities of battery din connection or unusual battery temperature. Charging start conditions (when battery is confirmed to be connected) Charging voltage is set to 4.2 V when battery connection is confirmed. 1.15 second (C2 = 2.2 µF) later, the voltage is changed to 1.46 V to detect battery voltage. (Voltage detection is not done until the voltage is changed to 1.46 V.) During 4.2 V constant voltage output, the voltage drop by current detecting resistor is limited to 256 mV. When battery voltage is between 1.54 V and 4.2 V, constant current charge gets started. In the case the voltage is 4.2 V or more, 4.2 V constant voltage charging starts to monitor charging current. (2) Constant current control block and current detection Charging current is measured between SENSE+ and SENSE– terminals so that constant current control is performed. Current sensing resistor voltage drop is set as follows: When battery voltage is between 1.54 V and 3.07 V, voltage drop is set to 26 mV. When battery voltage is 3.07 V or more, voltage drop is set to 256 mV. When charge current is detected and battery voltage is 4.1 V or more, and the above voltage drop of less than one fifth of ADJ terminal voltage continues for 1.15 second (C2 = 2.2 µF) during constant voltage charging, completion of charge is confirmed and then output changes to constant voltage of 1.46 V. (Preventing function of erroneous detection works.) (3) Constant voltage control block Battery voltage and output voltage is measured via VSENSE terminal. When battery voltage rises up to 4.2 V or more by constant current charging, 4.2 V constant voltage control starts instead. When the above voltage drop of less than one fifth of ADJ terminal voltage continues for 1.15 second (C2 = 2.2 µF) during constant voltage charging, charge completion is confirmed and then output changes to constant voltage of 1.46 V. (The preventing function of erroneous detection works.) (4) Voltage detection block When battery voltage monitored via the VSENSE terminal is 1.54 V or less, charging is inhibited by confirming that battery is over discharged or shorted battery is connected. When battery voltage is 1.54 V or more, following two charging current values are to be set according to the battery outputs: When battery voltage is between 1.54 V and 3.07 V, current measuring resistor voltage drop is set to 26 mV. When battery voltage is 3.07 V or more, above voltage drop is set to 256 mV. When battery voltage rises up to 4.2 V during the constant current charging, constant voltage charging gets started. When battery voltage is 3.99 V or less for 1.06 second (C1 = 2.2 µF) after charge completion, recharging will start. (Prevention function of erroneous detection works.) (5) Temperature detecting block Temperature detection is done through TIN terminal. Detecting battery temperature is accomplished by external resistor and thermistor using the regulated 4.53 V of the VDD terminal. When TIN voltage is between 1.49 V and 3.21 V, measured temperature is regarded as normal according to internal setting, then charging will start. When TIN voltage is 1.49 V or less, or 3.21 V or more, charging is inhibited due to the decision of the unusual battery temperature. When TIN voltage goes down to 1.49 V or less after charging starts, charging stops until TIN voltage rises up to 1.59 V or more. (It has hysteresis corresponding to battery temperature range of 2.5°C.) Temperature detection is completed after 49 ms (C3 = 0.1 µF) halt of detection voltage. Preventing function of erroneous detection works.) REJ03F0243-0200 Rev.2.00 Sep 14, 2007 Page 4 of 12 M62253BGP (6) Regulated power supply block Regulated 4.53 V is provided at VDD terminal. Detecting battery temperature is done by this regulated voltage together with external resistor and thermistor. (7) Output block External PNP transistor should be connected to OUT terminal because of an opened collector output circuit configuration. Maximum output current is 30 mA, so charging can be done with charging current up to 30 mA multiplied by hFE of external transistor. (8) LED driving block Output configuration of this block is opened collector by NPN Tr. Charging states are indicated by using two LEDs. LED1 is on during charge, LED2 is on at the completion of charge, where "on" refers to turning on of LED, "off" turning off of LED. LED indication changes from "charge" to "completion of charge" 2.21 second (C2 = 2.2 µF) after the completion is confirmed by monitoring the charging current. Once charge completion is indicated (LED1 = OFF, LED2 = ON), LED1 continues to be OFF, and LED2 continues to be ON until non-connection of battery is confirmed at TIN terminal. Such is also the case with the period for recharging. REJ03F0243-0200 Rev.2.00 Sep 14, 2007 Page 5 of 12 M62253BGP Flowchart for Charging Insert Battery No Charge inhibit charge off LED1: turned OFF LED2: turned OFF 1.49 V < VTIN < 3.21 V Yes Delay CKT. for temp. detect is start to action No After 49 ms 1.49 V < VTIN < 3.23 V Yes LED1: turned ON and Const. current charge: 256 mA or Const. voltage charge: 4.2 V (during 1.15 s) Charge inhibit charge off LED1: turned OFF LED2: turned OFF Const. voltage output: 1.46 V (during 106 ms) Const. voltage charge: 4.2 V 4.2 V or more less than 1.54 V Check battery voltage 1.54 V < Vbatt < 4.2 V Const. current charge: 250 mA Check charge current charge completion charge completion current or more current or less Delay CKT. for current detect is start to action Check battery voltage 3.07 V < Vbatt < 4.2 V 1.54 V < Vbatt < 3.07 V Check battery voltage 3.07 V < Vbatt < 4.2 V Const. current charge: 26 mA No 4.2 V or more Charge current: charge completion current or less (pass to 1.15 s) Const. voltage charge: 4.2 V Check battery voltage Yes less than 3.07 V Stop the charge (to change output voltage to 1.46 V) 3.07 V or more Check charge current charge completion charge completion current or more current or less Flowchart of temp. detect. (with hysteresis) during charge Delay CKT. for current detect is start to action No Charge current: charge completion current or less (pass to 1.15 s) No Yes When high temp. When low temp. Const. current or Const. voltage charge. (1.49 V < VTIN < 3.23 V) Const. current or Const. voltage charge. (1.49 V < VTIN < 3.23 V) VTIN < 1.49 V No Stop the charge (to change output voltage to 1.46 V) 3.23 V < VTIN Yes Yes Delay CKT. for temp. detect is start to action Delay CKT. for temp. detect is start to action Complete charge (charge OFF) LED1: OFF LED2: ON passed 1.06 s No After 49 ms VTIN < 1.59 V LED1: turned OFF, LED2: turned ON No Yes After 49 ms 3.21 V < VTIN Yes Charge inhibit Charge inhibit 3.99 V or more Check battery voltage No 3.99 V or less Battery voltage 3.99 V or less (pass to 1.06 s) Yes Notes: No Delay CKT. for temp. detect is start to action Delay CKT. for temp. detect is start to action No After 49 ms 1.49 V < VTIN No Yes 1. The voltage, current, and time values depend on application circuit. 2. Chage completion current = one fifth ADJ voltage/Rsense REJ03F0243-0200 Rev.2.00 Sep 14, 2007 Page 6 of 12 VTIN < 3.13 V Yes Yes Delay CKT. for current detect is start to action No 1.59 V < VTIN After 49 ms VTIN < 3.23 V Yes M62253BGP Functional Timing Diagram (The component Values are the Same as those of the Application Circuits) (1) Battery Connecting/Disconnecting Detection Timing Battery is connected Output voltage 4.2 V 49 ms 1.46 V 1.15 s 106 ms Voltage detection Current detection Charge starts (2) Battery Temperature Detection Timing Battery temper. 45°C 42.5°C 3°C 2.5°C 49 ms ON Charge OFF REJ03F0243-0200 Rev.2.00 Sep 14, 2007 Page 7 of 12 49 ms 49 ms 49 ms M62253BGP (3) Timing Diagram During a Charge 4.2 V Battery voltage 3.99 V 3.07 V 1.06 s 1.54 V Completion of detecting the battery temper. Constant current charging 1.15 s Constant current charging Constant voltage charging Completion of charging 106 ms 26 mA Charging current 256 mA 256 mA Vo = 4.2 V Vo = 1.46 V 1.15 s ADJ voltage/5/RSENSE 0 1.06 s Charge LED1 (Red) ON OFF ON LED2 (Green) OFF REJ03F0243-0200 Rev.2.00 Sep 14, 2007 Page 8 of 12 Recharging (Constant current charging) 256 mA M62253BGP The Application Circuit Note: The following thermistor is recommended. Maker: ISHIZUKA DENSHI Type: 103HT Characteristic: 10 kΩ at 25°C (1) When Thermistor is Located in Battery Pack 1 µF + + VDD 4.2 V 2.2 µF VCC C1 Regulated supply 4.53 V + OE [4.1 V⇔3.99 V] − + − Erroneous detection prevention ISET − + 3.07 V OUT OUT Constant current control OE ISENSE+ ISENSE- SENSE+ OUT 1Ω SENSE− Constant voltage control + VSET − VSENSE VSENSE 1.54 V Erroneous detection prevention LED2 to VDD pin Current detection ADJ − LED1 + Erroneous detection prevention 1.49 V to VDD pin 10 kΩ − + 3.21 V GND C3 0.1 µF C2 + + TIN 2.2 µF Thermistor REJ03F0243-0200 Rev.2.00 Sep 14, 2007 Page 9 of 12 Battery M62253BGP (2) When Thermistor is Located in Charger or Thermistor is not Used (For Your Reference) 1 µF + + VDD 2.2 µF VCC C1 OUT Regulated supply 4.53 V + − − OE [4.1 V⇔3.99 V] ISENSE+ Erroneous detection prevention + OUT Constant current control ISET − + OE ISENSE- SENSE+ + VSET 1Ω OUT SENSE− Constant voltage control 3.07 V VSENSE − VSENSE 1.54 V LED2 − LED1 C3 0.1 µF Battery 1.49 V 10 kΩ − + + 3.21 V TIN C2 + ADJ + Erroneous detection prevention GND To VDD terminal Current detection Erroneous detection prevention 2.2 µF 10 kΩ Note: Replace this resistor with thermistor when thermistor is located in charger. REJ03F0243-0200 Rev.2.00 Sep 14, 2007 Page 10 of 12 M62253BGP How to Set Quick Charge Current and Charge Completion Detection Current (1) How to set quick charge current (Iqchg) Quick charge current (Iqchg) depends upon RSENSE. Set the value of RSENSE by putting Iqchg required into the formula below. RSENSE [Ω] = charge current setting voltage 2 / Iqchg [mA] =256 mA / Iqchg [mA] , where pre-charge current is given by: Pre-charge current = charge current setting voltage 1 / RSENSE = 26 mV / RSENSE (2) How to set charge completion detection current (Icomp) Charge completion detection current (Icomp) depends upon RSENSE and ADJ terminal voltage (Vadj). Set ADJ terminal voltage by putting charge completion detection current required and RSENSE given by (1) into the formula below. Vadj [V] = 5 × RSENSE [Ω] × lcomp [A] , where the constant 5 is internally fixed. Note: Refer to the chart below for setting RSENSE and ADJ terminal voltage. (Chart below shows the relationship between ADJ terminal voltage (Vadj) and charge completion detection current (Icomp).) ADJ Term. Volt. Setting Quick charge 256 mA 450 mA 512 mA 700 mA Rsense Charge comp. current lcomp 1Ω 26 mA 0.56 Ω 100 mA 130 mA 0.50 Ω 100 mA 130 mA 0.36 Ω 100 mA 130 mA ADJ term. voltage Vadj = 5 × Rs × lcomp 125 mV 280 mV 250 mV 180 mV Note: 364 mV 325 mV Several 10 kΩ or around is recommended for the total resistor value R1 and R2 for ADJ. How lcomp Relates itself to Vadj Rsense = 1 Ω (quick charge current = 256 mA) 1000 Vadj (mV) Rsense = 0.50 Ω (quick charge current = 512 mA) 750 Rsense = 0.36 Ω (quick charge current = 700 mA) 500 250 Note: Set charge current setting voltage 2 to be greater than charge current setting voltage 1. 0 0 50 100 150 200 Icomp (mA) REJ03F0243-0200 Rev.2.00 Sep 14, 2007 Page 11 of 12 250 300 234 mV M62253BGP 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 REJ03F0243-0200 Rev.2.00 Sep 14, 2007 Page 12 of 12 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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