Datasheet

UNISONIC TECHNOLOGIES CO., LTD
UB244A
Preliminary
CMOS IC
LI-ION BATTERY PROTECTION
IC FOR 1-CELL TO 4-CELL PACK
(SECONDARY PROTECTION)
„
DESCRIPTION
The UTC UB244A Series is secondary protection IC for 1-, 2-, 3-,
or 4-Cell lithium-ion rechargeable battery packs, and incorporates a
high-accuracy voltage detection circuit.
The UTC UB244A Series also includes a high accuracy delay
circuit for over voltage detection time can be set by an external
capacitor.
„
FEATURES
* High-accuracy voltage detection circuit for each cell
* Overcharge detection voltage n (n=1 to 4): 4.05V to 4.50V
(in 50mV steps)
* Overcharge hysteresis voltage n (n=1 to 4): 0.38V±0.10V,
0.25V±0.07V, 0.13V±0.04V, 0.045V±0.02V, None
* Delay times for overcharge detection can be set by an external
capacitor
* CMOS output active “H”
* Wide operating voltage range 3.6V to 24V
* Wide operating temperature range −40°C to +85°C
* Low current consumption: 1.5μA typ. (+25°C) at 3.5V for each cell
„
ORDERING INFORMATION
Ordering Number
Lead Free
Halogen Free
UB244AL-xx-SM1-R
UB244AG-xx-SM1-R
Note: xx: Output Voltage, refer to Marking Information.
UB244AG-xx-SM1-R
Package
Packing
MSOP-8
Tape Reel
(1)Packing Type
(1) R: Tape Reel
(2)Package Type
(2) SM1: MSOP-8
(3)Output Voltage Code
(3) xx: Refer to Marking Information
(4)Halogen Free
(4) G: Halogen Free, L: Lead Free
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Copyright © 2012 Unisonic Technologies Co., Ltd
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Preliminary
„
PIN CONFIGURATION
„
PIN DESCRIPTION
„
PIN NO.
1
2
PIN NAME
VCC
SENSE
3
VC1
4
VC2
5
VC3
6
VSS
7
8
ICT
CO
CMOS IC
DESCRIPTION
Positive power input pin
Positive voltage connection pin of battery 1
Negative voltage connection pin of battery 1
Positive voltage connection pin of battery 2
Negative voltage connection pin of battery 2
Positive voltage connection pin of battery 3
Negative voltage connection pin of battery 3
Positive voltage connection pin of battery 4
Negative power input pin
Negative voltage connection pin of battery 4
Capacitor connection pin for overcharge detection delay
FET gate connection pin for charge
SERIAL CODE LIST
MODEL
UB244A
CODE
OVERCHARGE DETECTION
VOLTAGE
[VCU](V)
OVERCHARGE HYSTERSIS
VOLTAGE
[VCD](V)
OUTPUT FORM
AA
4.450±0.050
0.380±0.10
CMOS output active “H”
AB
4.115±0.050
0.130±0.04
CMOS output active “H”
AC
4.350±0.050
0.045±0.02
CMOS output active “H”
AD
4.450±0.050
0.045±0.02
CMOS output active “H”
AE
4.300±0.050
0.250±0.07
CMOS output active “H”
AF
4.400±0.050
0.045±0.02
CMOS output active “H”
AG
4.500±0.050
0.380±0.10
CMOS output active “H”
AH
4.475±0.050
0.380±0.10
CMOS output active “H”
AI
4.350±0.050
0.250±0.07
CMOS output active “H”
AJ
4.150±0.050
0.250±0.07
CMOS output active “H”
AK
4.250±0.050
0.250±0.07
CMOS output active “H”
AL
4.050±0.050
0.250±0.07
CMOS output active “H”
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„
Preliminary
CMOS IC
BLOCK DIAGRAM
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„
Preliminary
CMOS IC
ABSOLUTE MAXIMUM RATING (TA= 25°C unless otherwise specified)
PARAMETER
SYMBOL
RATINGS
UNIT
Input Voltage Between VCC And VSS
VDS
VSS−0.3 ~ VSS+26
V
Input Pin Voltage (SENSE/VC1/VC2/VC3)
VIN
VSS−0.3 ~ VCC+0.3
V
CO Output Pin Voltage
VCO
VSS−0.3 ~ VCC+0.3
V
Power Dissipation (Note 2)
PD
500
mW
Operation Ambient Temperature
TOPR
−40 ~ +85
°C
Storage Temperature
TSTG
−40 ~ +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 printed circuit board.
„
ELECTRICAL CHARACTERISTICS (TA=25°C unless otherwise specified)
PARAMETER
DETECTION VOLTAGE
Overcharge Detection Voltage n (n = 1,
2, 3, 4)
Overcharge Hysteresis
Voltage n (n = 1, 2, 3, 4)
(Note 1)
DELAY TIME
Overcharge Detection Delay
Time
OPERATING VOLTAGE
Operating Voltage Between
VCC And VSS (Note 2)
CURRENT CONSUMPTION
Current Consumption During
Operation
Current Consumption At Power Down
VC1 Pin Current
VC2 Pin Current
VC3 Pin Current
OUTPUT VOLTAGE
SYMBOL
VCUn
TEST CONDITIONS
4.05V ~ 4.50V Adjustment
VCDn
tCU
C=0.1μF
VDSOP
MIN
TYP
MAX
UNIT
VCUn −
0.050
VCUn
VCUn +
0.050
V
0.28
0.38
0.48
V
1.0
1.5
2.0
S
24
V
3.6
IOPE
V1=V2=V3=V4=3.5V
1.5
6.0
μA
IPDN
IVC1
IVC2
IVC3
V1=V2=V3=V4=2.3V
V1=V2=V3=V4=3.5V
V1=V2=V3=V4=3.5V
V1=V2=V3=V4=3.5V
1.2
0
0
0
6.0
0.5
0.5
0.5
μA
μA
μA
μA
CO “H” VOLTAGE
VCO(H)
IOUT = -10μA
CO “L” VOLTAGE
VCO(L)
IOUT = 10μA
-0.5
-0.5
-0.5
VCC
-0.05
V
VSS
+0.05
V
Notes: 1. 0.25±0.07V, 0.13±0.04V, 0.045±0.02V except for 0.38V hysteresis models.
2. After detecting the overcharge, the delay circuit operates normally in the range of operating voltage.
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Preliminary
CMOS IC
OPERATING
1. Overcharge Detection
CO is turned to “H” (for CMOS output active “H”) when the voltage of one of the batteries exceeds the overcharge
detection voltage (VCU) during charging under normal conditions beyond the overcharge detection delay time (tCU).
This state is called “overcharge.” Attaching FET to the CO pin provides charge control and a second protection. At
that time, the overcharge state is maintained until the voltage of all batteries decreases from the overcharge
detection voltage (VCU) by the equivalent to the overcharge hysteresis voltage (VCD).
2. Delay Circuit
The overcharge detection delay time (tCU) change with an external capacitor (CICT). The delay times are calculated
by the following equations:
Overcharge detection delay time tCU[s] = (15±5 )×CICT [μF]
„
TIMING CHARTS
V1 Battery
VCU
V2 Battery
V3 Battery
V4 Battery
VCD
Battery voltage
VSS
VCC
CO pin voltage
CMOS output active “H” and
Nch open drain models
VSS
VCC
VDET
ICT pin voltage
VSS
tCU
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Preliminary
CMOS IC
TYPICAL APPLICATION CIRCUIT
(1) Connection Example 1 (for 4-cells)
SC PROTECTOR
EB+
RVCC
SENSE
BAT1
BAT2
R1
R2
CVCC
C1
VC1
C2
UTC
UB244A
VC2
BAT3
R3
VCC
ICT
CICT
C3
VC3
BAT4
R4
FET
C4
VSS
CO
DP
EB-
Constants for External Components 1
SYMBOL
R1 to R4
MIN
0
TYP
1k
MAX
10 k
UNIT
Ω
C1 to C4
0
0.1
1
μF
RVCC
0
100
1k
Ω
CVCC
0
0.1
1
μF
CICT
0
0.1
1
μF
Notes: 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.
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Preliminary
CMOS IC
TYPICAL APPLICATION CIRCUIT(Cont.)
(2) Connection Example 2 (for 4-cells)
EB+
RVCC
SENSE
BAT1
BAT2
R1
R2
CVCC
C1
VC1
UTC
UB244A
C2
VC2
BAT3
R3
VCC
ICT
CICT
C3
VC3
BAT4
R4
FET
C4
VSS
CO
DP
EB-
SC PROTECTOR
Constants for External Components 2
SYMBOL
R1 to R4
MIN
0
TYP
1K
MAX
10 k
UNIT
Ω
C1 to C4
0
0.1
1
μF
RVCC
0
100
1k
Ω
CVCC
0
0.1
1
μF
CICT
0
0.1
1
μF
Notes: 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.
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Preliminary
CMOS IC
TYPICAL APPLICATION CIRCUIT(Cont.)
(3) Connection Example 3 (for 3-cells)
SC PROTECTOR
EB+
RVCC
SENSE
BAT1
BAT2
R1
R2
CVCC
C1
VC1
C2
UTC
UB244A
VC2
BAT3
R3
VCC
ICT
CICT
C3
VC3
VSS
FET
CO
DP
EB-
Constants for External Components 3
SYMBOL
R1 to R3
MIN
0
TYP
1k
MAX
10 k
UNIT
Ω
C1 to C3
0
0.1
1
μF
RVCC
0
100
1k
Ω
CVCC
0
0.1
1
μF
CICT
0
0.1
1
μF
Notes: 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.
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„
Preliminary
CMOS IC
TYPICAL APPLICATION CIRCUIT(Cont.)
(4) Connection Example 4 (for 2-cells)
SC PROTECTOR
EB+
RVCC
SENSE
BAT1
BAT2
R1
R2
VCC
CVCC
C1
VC1
C2
UTC
UB244A
VC2
ICT
CICT
VC3
VSS
FET
CO
DP
EB-
Constants for External Components 4
SYMBOL
MIN
TYP
MAX
UNIT
R1 to R2
0
1k
10 k
Ω
C1 to C2
0
0.1
1
μF
RVCC
0
100
1k
Ω
CVCC
0
0.1
1
μF
CICT
0
0.1
1
μF
Notes: 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.
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„
Preliminary
CMOS IC
TYPICAL APPLICATION CIRCUIT(Cont.)
(5) Connection Example 5 (for 1-cell)
SC PROTECTOR
EB+
RVCC
SENSE
BAT1
R1
VCC
CVCC
C1
VC1
UTC
UB244A
VC2
ICT
CICT
VC3
VSS
FET
CO
DP
EB-
Constants for External Components 5
SYMBOL
R1
MIN
0
TYP
1k
MAX
10 k
UNIT
Ω
C1
0
0.1
1
μF
RVCC
0
100
1k
Ω
CVCC
0
0.1
1
μF
CICT
0
0.1
1
μF
Notes: 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.
„
PRECAUTIONS
1.
DO NOT connect any of overcharged batteries. Even if only one overcharged battery is connected to this IC,
the IC detects overcharge, then charge current flows to the delay capacitor through the parasitic diode between
pins where the battery is not connected yet. This may lead to a malfunction. Please perform sufficient
evaluation in the case of use. Depending on an application circuit, even when the fault charge battery is not
contained, the connection turn of a battery may be restricted in order to prevent the output of CO detection
pulse at the time of battery connection.
Any position from V1 to V4 can be used when applying this IC for a one to three-cell battery. However, be sure
to short circuit between pins not in use (SENSE-VC1, VC1-VC2, VC2-VC3, or VC3-VSS).
The application conditions for the input voltage, output voltage, and load current should not exceed the package
power dissipation.
Do not apply an electrostatic discharge to this IC that exceeds the performance ratings of the built-in
electrostatic protection circuit.
2.
3.
4.
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Preliminary
CMOS IC
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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