UB209A (UTC)
BATTERY PROTECTION IC

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UNISONIC TECHNOLOGIES CO., LTD
UB209A
Preliminary
BATTERY PROTECTION IC
WITH CELL-BALANCE
FUNCTION
CMOS IC
DESCRIPTION
The UTC UB209A Series is a protection IC for lithium-ion/lithium
polymer rechargeable batteries, including a high precision voltage
detection circuit and a delay circuit.
The UTC UB209A Series has a transmission function and two
types of cell-balance function so that users are also able to configure
a protection circuit with series multi-cell.
FEATURES
* Settable delay time by external capacitor for output pin
* High-accuracy voltage detection circuit
* Two types of cell-balance function: charge/discharge
* Control charging, discharging, cell-balance by CTLC, CTLD pins
* Low current consumption: 8.0µA max
* Wide range of operation temperature (-40°C ~ +85°C)
ORDERING INFORMATION
Ordering Number
Lead Free
Halogen Free
UB209AL-xx-S08-R
UB209AG-xx-S08-R
UB209AL-xx-P08-R
UB209AG-xx-P08-R
Note: xx: Output Voltage, refer SERIAL CODE LIST.
Package
SOP-8
TSSOP-8
Packing
Tape Reel
Tape Reel
UB209AG-xx-S08-R
(1)Packing Type
(2)Package Type
(3)Output Voltage Code
(4)Green Package
(1) R: Tape Reel
(2) S08: SOP-8, P08: TSSOP-8
(3) xx: Refer to SERIAL CODE LIST
(4) G: Halogen Free and Lead Free, L: Lead Free
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BATTERY PROTECTION IC

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UB209A
Preliminary
CMOS IC
SERIAL CODE LIST
Model
UB209A
Code
Overcharge
Detection
Voltage
[VCU](V)
Overcharge
Release
Voltage
[VCL](V)
AA 4.100
AB 3.800
AC 3.900
AD 4.250
AE 4.000
AF 4.250
AG 3.900
AH 3.900
AI 4.150
AJ 4.250
AK 4.300
4.000
3.750
3.500
4.100
3.900
4.100
3.600
3.700
4.050
4.150
4.200
Cell-balanc
e Detection
Voltage
[VBU](V)
4.050
3.650
3.550
4.200
3.950
4.100
3.550
3.600
3.900
4.100
4.225
Cell-balanc
e Release
Voltage
[VBL](V)
4.000
3.600
3.550
4.100
3.900
4.000
3.500
3.600
3.900
4.050
4.225
Overdischar
ge
Detection
Voltage
[VDL](V)
Overdischar
ge Release
Voltage
[VDU](V)
Discharge
Cell-balance
Function
2.50 2.70 Yes
2.00 2.50 Yes
2.50 2.70 Yes
2.50 3.00 Yes
2.50 2.70 Yes
2.75 3.05 Yes
2.00 2.40 Yes
2.50 2.80
No
3.00 3.30 Yes
2.50 2.80 Yes
2.00 2.50 Yes
MARKING
SOP-8
TSSOP-8
PIN CONFIGURATION
CTLC 1
CTLD 2
VDD 3
CDT 4
8 CB
7 CO
6 DO
5 VSS
PIN DESCRIPTION
PIN NO.
1
2
3
4
5
6
7
8
PIN NAME
CTLC
CTLD
VDD
CDT
VSS
DO
CO
CB
DESCRIPTION
Pin for charge control
Pin for discharge control
Connection pin for input positive power supply, for battery’s positive voltage
Connection pin to capacitor for overcharge detection delay, for over discharge detection
delay
Input pin for negative power supply, Connection pin for battery’s negative voltage
Output pin for discharge control (Nch open drain output)
Output pin for charge control (Nch open drain output)
Output pin for cell-balance control (CMOS output)
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BATTERY PROTECTION IC

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UB209A
BLOCK DIAGRAM
Preliminary
CMOS IC
CDT
VDD
8.31 M
VSS
Logic Control and Delay Circuit
CO
DO
+
-
Cell-balance
detection
comparator
+
-
Overcharge
detection
comparator
+
-
Overdischarge
detection
comparator
CB
400 nA
CTLC
400 nA
CTLD
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BATTERY PROTECTION IC

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UB209A
Preliminary
CMOS IC
ABSOLUTE MAXIMUM RATING (TA=25°C unless otherwise specified)
PARAMETER
SYMBOL
RATINGS
UNIT
Input Voltage Between VDD and VSS
CB Pin Output Voltage
VDS VSS-0.3 ~ VSS+9.0 V
VCB VSS-0.3 ~ VDD+0.3 V
CDT Pin Voltage
DO Pin Output Voltage
VCDT
VDO
VSS-0.3 ~ VDD+0.3
VSS-0.3 ~ VSS+18
V
V
CO Pin Output Voltage
CTLC Pin Input Voltage
VCO
VCTLC
VSS-0.3 ~ VSS+18
VDD-18 ~ VDD+0.3
V
V
CTLD Pin Input Voltage
Power Dissipation (Note 2)
SOP-8
TSSOP-8
VCTLD
PD
VDD-18 ~ VDD+0.3
700
V
mW
mW
Operating Ambient Temperature
TOPR
-40 ~ +85
°C
Storage Temperature
TSTG
-55 ~ +125
°C
Notes: 1. Absolute maximum ratings are those values beyond which the device could be permanently damaged.
Absolute maximum ratings are stress ratings only and functional device operation is not implied.
2. When mounted on board Size: 114.3mm×76.2mm×1.6mm.
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BATTERY PROTECTION IC

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UB209A
Preliminary
CMOS IC
ELECTRICAL CHARACTERISTICS (TA=25°C unless otherwise specified)
PARAMETER
SYMBOL TEST CONDITIONS MIN
TYP
MAX
UNIT
Test
circuit
Overcharge Detection Voltage
Overcharge Release Voltage
VCU
VCL
VCU -0.05 VCU VCU +0.05 V
VCL-0.05 VCL VCL+0.05 V
1
1
Cell-balance Detection Voltage VBU
Cell-balance Release Voltage VBL
VBU-0.05 VBU VBU+0.05 V
VBL-0.05 VBL VBL+0.05 V
1
1
Over Discharge Detection
Voltage
VDL
VDL-0.10 VDL VDL+0.10 V
1
Over Discharge Release
Voltage
VDU
VDU-0.10 VDU VDU+0.10 V
1
Detection Delay Time (Note 1) tDET CCDT=0.01µF
Release Delay Time
tREL CCDT=0.01µF
50 100 150 ms 2
5 10 15 ms 2
CDT Pin Detection Voltage
Operating Voltage Between
VDD and VSS
VCDET
VDSOP
VDS=3.5V
VDS×0.65
Output Voltage of CO,
DO, CB Fixed
1.5
VDS×0.70
VDS×0.75
8.0
V
V
3
CTLC Pin H Voltage
CTLD Pin H Voltage
VCTLCH VDS=3.5V
VCTLDH VDS=3.5V
VDS×0.55
VDS×0.55
VDS×0.90
VDS×0.90
V
V
4
4
CTLC Pin L Voltage
CTLD Pin L Voltage
VCTLCL VDS=3.5V
VCTLDL VDS=3.5V
VDS×0.10
VDS×0.10
VDS×0.45
VDS×0.45
V
V
4
4
Current Consumption During
Operation (Note 2)
IOPE VDS=3.5V
3.5 8.0 µA 5
Source Current CTLC (Note 2) ICTLCH VDS=3.5V, VCTLC=0V
200
400
600 nA 6
Source Current CTLD (Note 2) ICTLDH VDS=3.5V, VCTLD=0V
200
400
600 nA 6
Source Current CB
ICBH VCB=4.0V, VDS=4.5V
30
µA 7
Sink Current CB
Sink Current CO
ICBL VCB=0.5V, VDS=3.5V
ICOL VCO=0.5V, VDS=3.5V
30
30
µA 7
µA 7
Leakage Current CO
Sink Current DO
ICOH
IDOL
VCO=18V, VDS=4.5V
VDO=0.5V, VDS=3.5V
30
0.2 µA 8
µA 7
Leakage Current DO
IDOH VDO=18 V, VDS=1.8V
0.2 µA 8
Notes: 1. In the UTC UB209A Series, users are able to set delay time for the output pins. By using the following
formula, delay time is calculated with the value of CDT pin’s resistance in the IC (RCDT) and the value of
capacitor set externally at the CDT pin (CCDT).
tD [s]=-ln(1-VCDET /VDS)×CCDT [µF]×RCDT [M]
=-ln (1-0.7(Typ.) )×CCDT [µF]×8.31M(Typ.)
=10.0M(Typ.)×CCDT [µF]
In case of the capacitance of CDT pin CCDT=0.01µF, the output pin delay time tD is calculated by using the
above formula and as follows.
tD [s]=10.0M(Typ.)×0.01µF=0.1s(Typ.)
Test the CDT pin detection voltage (VCDET) by test circuits shown in this datasheet after applying the power
supply while pulling-down the CTLC, CTLD pins to the level of VSS pin outside the IC.
2. In case of using CTLC, CTLD pins pulled-down to the level of VSS pin externally, the current flows into the
VDD pin (IDD) is calculated by the following formula.
IDD=IOPE+ICTLCH+ICTLDH
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BATTERY PROTECTION IC

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UB209A
TEST CIRCUIT
Preliminary
CMOS IC
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BATTERY PROTECTION IC

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UB209A
TEST CIRCUIT(Cont.)
Preliminary
CMOS IC
OPERATION
Figure 9 shows the operation transition of UTC UB209A.
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BATTERY PROTECTION IC

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UB209A
OPERATION
1. Normal Status
Preliminary
CMOS IC
In the UTC UB209A, both of CO and DO pin get the VSS level; the voltage between VDD and VSS (VDS) is more
than the overdischarge detection voltage (VDL), and is less than the overcharge detection voltage (VCU) and
respectively, the CTLC pin input voltage (VCTLC)<the CTLC pin voltage “H” (VCTLCH), the CTLD pin input voltage
(VCTLD)<the CTLD pin voltage “H” (VCTLDH). This is the normal status.
2. Overcharge Status
In the UTC UB209A, the CO pin is in high impedance; when VDS gets VCU or more, or VCTLC gets VCTLCH or more.
This is the overcharge status.
If VDS gets the overcharge release voltage (VCL) or less, and VCTLC gets the CTLC pin voltage “L” (VCTLCL) or less,
the UTC UB209A releases the overcharge status to return to the normal status.
3. Overdischarge Status
In the UTC UB209A, the DO pin is in high impedance; when VDS gets VDL or less, or VCTLD gets VCTLDH or more.
This is the overdischarge status.
If VDS gets the overdischarge release voltage (VDU) or more, and VCTLD gets the CTLD pin voltage “L” (VCTLDL) or
less, the UTC UB209A releases the overdischarge status to return to the normal status.
4. Cell-balance Function
In the UTC UB209A, the CB pin gets the level of VDD pin; when VDS gets the cell-balance detection voltage (VBU)
or more. This is the charge cell-balance function.
If VDS gets the cell-balance release voltage (VBL) or less again, the UTC UB209A sets the CB pin the level of VSS
pin.
In addition, the CB pin gets the level of VDD pin; when VDS is more than VDL, and VCTLD is VCTLDH or more. This is
the discharge cell-balance function.
If VCTLD gets VCTLDL or less, or VDS is VDL or less again, the UTC UB209A sets the CB pin the level of VSS.
5. Delay Circuit
In the UTC UB209A, users are able to set delay time which is from detection of changes in VDS, VCTLC, VCTLD to
output to the CO, DO, CB pin.
For example in the detection of overcharge status, when VDS exceeds VCU, or VCTLC gets VCTLCH or more, charging
to CCDT starts via RCDT. If the voltage between CDT and VSS (VCDT) reaches the CDT pin detection voltage (VCDET),
the CO pin is in high impedance. The output pin delay time tD is calculated by the following formula.
tD [s]=10.0M(Typ.)×CCDT [µF]
The electric charge in CCDT starts to be discharged when the delay time has finished.
The delay time that users have set for the CO pin, as seen above, is settable for each output pin DO, CB.
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UB209A
Preliminary
TYPICAL APPLICATION CIRCUIT
CMOS IC
EB+
EB-
1 MΩ
1 MΩ
510 kΩ
510 kΩ
1 kΩ
1 kΩ
1 MΩ
CFET DFET
1 MΩ
1 kΩ
CO1
DO1
VDD1
CDT1
UTC UB209A
(1) CB1
CTLC1
CTLD1
VSS1
0.01 µF
470 Ω
0.1 µF
BAT1
1 kΩ
CO2
DO2
VDD2
CDT2
0.1 µF
470 Ω
UTC UB209A
(2) CB2
CTLC2
CTLD2
VSS2
1 kΩ
CO3
DO3
VDD3
CDT3
UTC UB209A
(3) CB3
CTLC3
CTLD3
VSS3
BAT2
0.1 µF
470 Ω
BAT3
1 kΩ
Figure 10
Caution
1. The above constants may be changed without notice.
2. The example of connection shown above and the constant do not guarantee proper operation.
Perform thorough evaluation using the actual application to set the constant.
UTC assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or
other parameters) listed in products specifications of any and all UTC products described or contained
herein. UTC products are not designed for use in life support appliances, devices or systems where
malfunction of these products can be reasonably expected to result in personal injury. Reproduction in
whole or in part is prohibited without the prior written consent of the copyright owner. The information
presented in this document does not form part of any quotation or contract, is believed to be accurate
and reliable and may be changed without notice.
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