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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
4.2 V + -
Regulated supply 4.53 V - + 4.1 V3.99 V
Erroneous detection prevention
OE
OUT
OUT SENSE+
Constant current control
ISET
ISENSE+
ISENSE-
- +
OE
OUT
3.07 V
+ -
VSET
Constant voltage control
VSENSE
SENSE-
1.54 V Erroneous detection prevention Current detection
VSENSE
LED2
- + - + 1.49 V
ADJ
LED1
Erroneous detection prevention
TIN
3.21 V
GND
C3
C2
REJ03F0243-0200 Rev.2.00 Sep 14, 2007 Page 1 of 12
M62253BGP
Pin Arrangement
M62253BGP
TIN C3 ADJ VDD VCC NC LED1 LED2
1 2 3 4 5
6 7 8
16 15 14 13 12
11 10 9
OUT SENSE+ SENSE- VSENSE GND NC C2 C1
(Top view) Outline: PLSP0016JA-A (16P2E-A)
Pin Description
Pin No. 1 2 3 4 5 7, 8 9 10 12 13 14 15 16 Pin Name TIN C3 ADJ VDD VCC LED1, 2 C1 C2 GND VSENSE SENSE- SENSE+ OUT Function Temperature sensing input (also battery connecting detection input) Delay time setting for temperature sensing (Tpd = 49 ms @ 0.1F) 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 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 F) Delay time setting for current sensing (Tpd = 1.15 s @ 2.2 F) Ground Battery output voltage sensing input Charging current sensing input (connect to lower voltage node) Charging current sensing input (connect to higher voltage node) Charger output (opened collector)
Absolute Maximum Ratings
(Ta = 25C, unless otherwise noted)
Item Supply voltage Output current Applying voltage to SENSE pin Applying voltage to TIN pin Power dissipation Thermal derating Operating temperature Storage temperature Symbol VCC IOUT VSENSE VTIN Pd K Topr Tstg Ratings 16 30 VCC VCC 300 3.0 -20 to +85 -40 to +125 Unit V mA V V mW mW/C C C Ta = 25C Ta > 25C Condition
REJ03F0243-0200 Rev.2.00 Sep 14, 2007 Page 2 of 12
M62253BGP
Electrical Characteristics
(VCC = 12.0 V, VSENSE = 3.6 V, Ta = 25C, unless otherwise noted)
Blocks All device VDD Voltage detection Item Supply voltage Current consumption VDD output voltage Charge start voltage Quick charge start voltage Output voltage setting Recharge start voltage Current detection VSENSE terminal input current Charging current setting voltage 1 Charging current setting voltage 2 Symbol VCC ICC VDD VTHchgon VTHqchgon Vochg VTHrchgon linVSENSE ISET1 ISET2 Min 5.0 -- 4.30 1.44 2.97 4.17 3.89 -2.0 15 232 237 Charge completion detecting voltage Charge completion detecting voltage Input current into SENSE+ pin Input current into SENSE- pin LED1 pin saturation voltage LED2 pin saturation voltage TIN pin upper threshold voltage 1 TIN pin lower threshold voltage 1 TIN pin upper threshold voltage 2 TIN pin lower threshold voltage 2 Input current into TIN pin OUT C1 C2 Output pin saturation voltage Output pin leak current Delay time for voltage detection Connect/disconnect detection time1 Delay time for current detection Delay time for LED switch over Discharging time C3 Delay time for temperature detection ITHchgoff ITHchgoff IINSENSE+ IINSENSE- VOHLED1 VOHLED2 VTHINTH1 VTHINTL1 VTHINTH2 VTHINTL2 IinTIN VOHOUT ILOUT tdC1 tdBDET1 15 75 -- -- -- -- 3.11 1.39 3.13 1.49 -1.0 -- -- 0.76 0.82 Typ -- 7 4.53 1.54 3.07 4.20 3.99 -- 26 256 256 26 100 60 60 -- -- 3.21 1.49 3.23 1.59 -- 1.0 -- 1.06 1.15 Max 15.0 -- 4.76 1.64 3.17 4.23 4.09 2.0 37 280 275 37 125 85 85 0.4 0.4 3.31 1.59 3.33 1.69 -- 2.0 1.0 1.36 1.48 Unit V mA V V V V V A mV mV mV mV mV A A V V V V V V A V A s s IOUT = 20 mA VOUT = 15 V At recharge C1 = 2.2 F 4.2 V con. voltage output period C2 = 2.2 F C2 = 2.2 F C2 = 2.2 F C2 = 2.2 F (after current detection) C3 = 0.1 F During a charge At charge completion
1.56 V < battery V. < 3.07 V 5.0 V < VCC < 8.0 V 3.07 V < battery V. < 4.2 V 8.0 V < VCC < 15.0 V 3.07 V < battery V. < 4.2 V
Condition LED is off
Vadj = 0.13 V Vadj = 0.5 V During a charge During a charge ILED1 = 10 mA ILED2 = 10 mA VDD = 4.53 V
LED TIN
tdIDET tdILED tdchg tdC3
0.82 1.56 30 34
1.15 2.21 90 49
1.48 2.86 -- 64
s s ms ms
REJ03F0243-0200 Rev.2.00 Sep 14, 2007 Page 3 of 12
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 F) 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 F) 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 F) 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 F) 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 2.5C.) Temperature detection is completed after 49 ms (C3 = 0.1 F) 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 F) 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
Charge inhibit charge off LED1: turned OFF LED2: turned OFF
No
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
less than 1.54 V
4.2 V or more
Check battery voltage
Const. current charge: 250 mA
1.54 V < Vbatt < 4.2 V
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
Check battery voltage
3.07 V < Vbatt < 4.2 V 4.2 V or more
1.54 V < Vbatt < 3.07 V
Const. current charge: 26 mA
No
Charge current: charge completion current or less (pass to 1.15 s)
Const. voltage charge: 4.2 V
Check battery voltage
less than 3.07 V 3.07 V or more
Yes
Stop the charge (to change output voltage to 1.46 V)
Check charge current charge completion charge completion current or more current or less
Delay CKT. for current detect is start to action
Flowchart of temp. detect. (with hysteresis) during charge
When high temp. Const. current or Const. voltage charge. (1.49 V < VTIN < 3.23 V) When low temp. Const. current or Const. voltage charge. (1.49 V < VTIN < 3.23 V)
No
Charge current: charge completion current or less (pass to 1.15 s)
No
VTIN < 1.49 V
No
3.23 V < VTIN
Yes
Stop the charge (to change output voltage to 1.46 V)
Yes
Delay CKT. for temp. detect is start to action
Yes
Delay CKT. for temp. detect is start to action
LED1: OFF LED2: ON
Complete charge (charge OFF) passed 1.06 s LED1: turned OFF, LED2: turned ON
No
After 49 ms VTIN < 1.59 V
No
After 49 ms 3.21 V < VTIN
Yes
Charge inhibit 3.99 V or more
Yes
Charge inhibit
Check battery voltage
No
3.99 V or less Delay CKT. for current detect is start to action
1.59 V < VTIN
No
VTIN < 3.13 V
Yes
Delay CKT. for temp. detect is start to action
Yes
Delay CKT. for temp. detect is start to action
No
Battery voltage 3.99 V or less (pass to 1.06 s)
No
After 49 ms 1.49 V < VTIN
No
After 49 ms VTIN < 3.23 V
Yes
Yes
Yes
Notes:
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
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
4.2 V
49 ms
Output voltage
1.46 V
1.15 s
Voltage detection
106 ms
Current detection Charge starts
(2) Battery Temperature Detection Timing
Battery temper.
45C
42.5C
3C 2.5C
49 ms 49 ms
49 ms 49 ms
ON
Charge
OFF
REJ03F0243-0200 Rev.2.00 Sep 14, 2007 Page 7 of 12
M62253BGP (3) Timing Diagram During a Charge
4.2 V Battery voltage 3.99 V 3.07 V 1.54 V
Completion of detecting the battery temper.
1.15 s
1.06 s
Constant current charging
106 ms 26 mA
Constant current charging
256 mA
Constant voltage charging
Vo = 4.2 V
Completion of charging
Recharging (Constant current charging)
256 mA
Vo = 1.46 V
Charging current
256 mA
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
M62253BGP
The Application Circuit
Note: The following thermistor is recommended. Maker: ISHIZUKA DENSHI Type: 103HT Characteristic: 10 k at 25C (1) When Thermistor is Located in Battery Pack
1 F
+
VDD 4.2 V
Regulated supply 4.53 V
+
C1
2.2 F VCC
OE
OUT
OUT
+ -
- + - +
[4.1 V3.99 V]
Erroneous detection prevention
Constant current control
ISET ISENSE+ ISENSE-
SENSE+ 1
OE
OUT
SENSE-
3.07 V
+ -
Constant voltage control
VSET VSENSE
1.54 V
VSENSE
Erroneous detection prevention
LED2
Current detection
-
to VDD pin
ADJ
LED1
Erroneous detection prevention
+
- +
1.49 V
to VDD pin 10 k
Battery
3.21 V GND C3 0.1 F C2 TIN
+
+
2.2 F
Thermistor
REJ03F0243-0200 Rev.2.00 Sep 14, 2007 Page 9 of 12
M62253BGP (2) When Thermistor is Located in Charger or Thermistor is not Used (For Your Reference)
1 F
+
VDD
Regulated supply 4.53 V
+
2.2 F
C1
OE
VCC OUT Constant current control
ISET
ISENSEOUT
+ -
- + - +
3.07 V
[4.1 V3.99 V] Erroneous detection prevention
ISENSE+
SENSE+
1
OE
OUT
Constant voltage control
VSET VSENSE
SENSE-
+ -
1.54 V
VSENSE
Erroneous detection prevention
Current detection
1.49 V
To VDD terminal
LED2
ADJ
-
Battery
10 k
LED1
Erroneous detection prevention
+ - +
3.21 V
GND
C3
0.1 F
C2
TIN
10 k
+
+
2.2 F
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 [] = 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 x RSENSE [] x 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 Rsense Charge comp. current lcomp ADJ term. voltage Vadj = 5 x Rs x lcomp Note: 256 mA 1 26 mA 125 mV 450 mA 0.56 100 mA 130 mA 280 mV 364 mV 512 mA 0.50 100 mA 130 mA 250 mV 325 mV 700 mA 0.36 100 mA 130 mA 180 mV 234 mV
Several 10 k or around is recommended for the total resistor value R1 and R2 for ADJ.
How lcomp Relates itself to Vadj
Rsense = 1 (quick charge current = 256 mA) 1000
Rsense = 0.50 (quick charge current = 512 mA)
Vadj (mV)
750
Rsense = 0.36 (quick charge current = 700 mA)
500 250 0 0 50 100 150 200 250 300 Note: Set charge current setting voltage 2 to be greater than charge current setting voltage 1.
Icomp (mA)
REJ03F0243-0200 Rev.2.00 Sep 14, 2007 Page 11 of 12
M62253BGP
Package Dimensions
JEITA Package Code P-LSSOP16-4.4x5-0.65 RENESAS Code PLSP0016JA-A Previous Code 16P2E-A MASS[Typ.] 0.06g
16
9
HE
E
F
NOTE) 1. DIMENSIONS "*1" AND "*2" DO NOT INCLUDE MOLD FLASH. 2. DIMENSION "*3" DOES NOT INCLUDE TRIM OFFSET.
*1
1 Index mark
8
c
A2
A1
Reference Symbol
Dimension in Millimeters
*2
D
*3 e y
bp Detail F
D E A2 A A1 bp c HE e y L
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
Min 4.9 4.3
REJ03F0243-0200 Rev.2.00 Sep 14, 2007 Page 12 of 12
A
L
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