UNISONIC TECHNOLOGIES CO., LTD
UB2012
Preliminary
LINEAR INTEGRATED CIRCUIT
ADVANCED LINEAR CHARGE
MANAGEMENT IC FOR SINGLE
AND TWO-CELL LITHIUM-ION AND
LITHIUM-POLYMER
DESCRIPTION
UTC
UB2012
is designed for portable electronics with lower cost. Its
advantages of high-accuracy voltage/current regulation, charging status
indication, temperature monitoring, and automatic charge-rate compensation.
In applications, the battery temperature is continuously under monitor
by using an external thermistor, if the temperature is over user-defined
threshold; UTC
UB2012
inhibits charge for safety concern.
Generally, the UTC
UB2012
charges the battery in conditioning, constant voltage and constant current phases.
If the battery voltage is lower than the low-voltage threshold (V
MIN
), a low current is used for conditioning the battery.
The conditioning charge rate is around 10% of the regulation current and the heat dissipation in the external pass
element during the initial stage of the charge is minimized by the conditioning current. After the conditioning phase,
the UTC
UB2012
applies a constant current that be set by an external sense-resistor to the battery. The
sense-resistor can be on the battery without additional components. The constant current phase continues until the
battery reaches the charge-regulation voltage, then the constant voltage phase is beginning.
UTC
UB2012
offers 4.1V, 4.2V, 8.4V and 8.4V fixed-voltage for single and dual cells. Charge stops when the
current tapers to the charge termination threshold (I
TERM
) and will recharge if the battery voltage falls below the V
RCH
.
The automatic charge-rate compensation feature reduces the charging time of batteries. For the internal
impedance of battery pack during charge, this advanced technique offers safe and dynamic compensation.
FEATURES
*
*
*
*
*
*
*
*
*
*
*
*
Ideal for Single 4.1V,4.2V and Dual-Cell 8.2V,8.4V Li-Ion or Li-Pol Packs
0.3V Dropout Voltage for Minimizing Heat Dissipation
Better than ±1% Accuracy of Voltage Regulation With Preset Voltages
Dynamic Compensation of Battery Pack’s Internal Impedance to short Charging Time
Optional Cell-Temperature Monitoring
Integrated Voltage and Current Regulation With Programmable Charge-Current
Integrated Cell Conditioning for Reviving Deeply Discharged Cells and Minimizing Heat Dissipation During Initial
Charge Stage
Charge Status Output for Single or Dual Led or Host Processor Interface
Automatic Battery-Recharge Feature
Charge Termination by Minimum Current
Automatic Low-Power Sleep Mode When V
CC
is Removed
EVMs Available for Quick Evaluation
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Copyright © 2012 Unisonic Technologies Co., Ltd
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QW-R121-018.C
UB2012
Preliminary
LINEAR INTEGRATED CIRCUIT
ORDERING INFORMATION
Ordering Number
Lead Free
Halogen Free
UB2012xL-S08-R
UB2012xG-S08-R
UB2012xL-S08-T
UB2012xG-S08-T
x: Output Voltage, refer to Marking Information.
(1) Packing Type
(2) Package Type
(3) Lead Free
(4) Output Voltage Code
Package
SOP-8
SOP-8
(1) R: Tape Reel, T: Tube
(2) S08: SOP-8
(3) G: Halogen Free, L: Lead Free
(4) x: Refer to Marking Information
Packing
Tape Reel
Tube
Note:
UB2012xL-S08-R
MARKING INFORMATION
PACKAGE
VOLTAGE CODE
A: 4.1V
B: 4.2V
C: 8.2V
D: 8.4V
MARKING
UTC
UB2012xG
G: Halogen Free
L: Lead Free
Voltage Code
Lot Code
SOP-8
Date Code
PIN CONFIGURATION
SNS
BAT
V
CC
TS
1
2
3
4
8
7
6
5
COMP
CC
V
SS
STAT
PIN DESCRIPTION
PIN NO.
1
2
3
4
5
6
7
8
PIN NAME
SNS
BAT
V
CC
TS
STAT
V
SS
CC
COMP
I/O
I
I
I
I
O
O
I
PIN DESCRIPTION
Current sense input
Voltage sense input
Supply voltage
Temperature sense input
Charge status output
Ground
Charge control output
Charge-Rate compensation input (Auto Comp)
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QW-R121-018 .C
UB2012
PARAMETER
Supply Voltage
(V
CC
with respect to GND)
Preliminary
LINEAR INTEGRATED CIRCUIT
ABSOLUTE MAXIMUM RATING
(unless otherwise specified.)
SYMBOL
UB2012A
UB2012B
UB2012C
UB2012D
V
CC
V
CC
RATINGS
-0.3 ~ +8.0
-0.3 ~ +15
UNIT
V
V
Input Voltage, SNS, BAT,TS, COMP
V
IN
-0.3 ~ V
CC
+0.3
V
(all with respect to GND)
Sink Current (Note 2)
STAT pin
I
SINK
20
mA
Source Current (Note 2)
STAT pin
I
SOURCE
10
mA
Output Current (Note 2)
CC pin
I
OUT
40
mA
Power Dissipation (T
A
=25°C)
P
D
300
mW
Operating Temperature
T
OPR
-20 ~ +85
°C
Storage Temperature
T
STG
-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. Not to exceed P
D
.
RECOMMENDED OPERATING CONDITIONS
PARAMETER
UB2012A
UB2012B
Supply Voltage
UB2012C
UB2012D
Operating Free-Air Temperature Range
SYMBOL
V
CC
V
CC
T
A
MIN
4.5
8.6
-20
TYP
MAX
7.0
12
85
UNITS
V
V
°C
ELECTRICAL CHARACTERISTICS
PARAMETER
V
CC
Current
SYMBOL
I
(VCC)
CONDITIONS
V
CC
>V
CC(MIN)
, Excluding
external loads
UB2012A
UB2012B
UB2012C
UB2012D
UB2012A
UB2012B
UB2012C
UB2012D
MIN
TYP
2
3
3
MAX
5
7
6
15
3
5
5
5
UB2012A
UB2012B
UB2012C
UB2012D
UB2012A
UB2012B
UB2012C
UB2012D
4.050
4.150
8.100
8.300
80
90
4.10
4.20
8.20
8.40
100
115
4.150
4.250
8.300
8.500
120
140
UNITS
mA
mA
μA
μA
μA
μA
μA
μA
V
V
V
V
mV
mV
V
CC
Sleep Current
I
(VCCS)
V
(BAT)
≥V
(MIN)
V
(BAT)
-V
CC
≥0.8V
V
(BAT)
=V
(REG)
V
(SNS)
=5V
V
(TS)
=5V
V
(COMP)
=5V
BAT Pin
I
IB(BAT)
SNS Pin
I
IB(SNS)
Input Bias Current
TS Pin
I
IB(TS)
COMP Pin I
IB(COMP)
BATTERY VOLTAGE REGULATION
Output Voltage
V
O(REG)
See Notes
CURRENT REGULATION
Current Regulation Threshold
V
(SNS)
current sensing
configuration
CHARGE TERMINATION DETECTION
Charge Termination Current
V
(TERM)
Voltage at pin SNS, 0°C≤T
A
≤50°C
Detect Threshold
-24
-14
-4
mV
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QW-R121-018 .C
UB2012
Preliminary
LINEAR INTEGRATED CIRCUIT
ELECTRICAL CHARACTERISTICS
TEMPERATURE COMPARATOR
Lower
V
(TS1)
Temperature Threshold
Upper
V
(TS2)
PRECHARGE COMPARATOR
Precharge Threshold
V
(MIN)
29.1
58.2
UB2012A
UB2012B
UB2012C
UB2012D
2.94
3.04
5.88
6.08
30
60
3.0
3.1
6.0
6.2
13
3
V
O(REG)
-70mV
V
O(REG)
-140mV
1.7
13
V
O(REG
-
-100mV
V
O(REG)
-200mV
2.2
22
V
O(REG)
-130mV
V
O(REG)
-260mV
2.7
0.7
V
CC
-0.5
1.6
40
30.9
61.8
3.06
3.16
6.12
6.32
%V
CC
%V
CC
V
V
V
V
mV
mV
TS Pin Voltage
PRECHARGE CURRENT REGULATION
Voltage at pin SNS, 0°C≤T
A
≤50°C
Precharge Current Regulation V
(PRECHG)
Voltage at pin SNS,
0°C≤T
A
≤50°C,
V
CC
= 5 V
V
RCH
COMPARATOR (BATTERY RECHARGE THRESHOLD)
UB2012A
UB2012B
Recharge Threshold
V
(RCH)
UB2012C
UB2012D
CHARGE-RATE COMPENSATION (Automatic Charge-Rate Compensation)
Automatic Charge-Rate
G
(COMP)
V
(BAT)
+0.3V≤V
CC
≤V
CC(MAX),
Compensation Gain
STAT PIN
Output (Low) Voltage
V
OL(STAT)
I
OL
=10mA
Output (High) Voltage
V
OH(STAT)
I
OH
=5mA
CC PIN
Output Low Voltage
V
OL(CC)
I
O(CC)
=5mA (sink)
Sink Current
I
O(CC)
Not to exceed power rating (P
D
)
Note:
V
(BAT)
+0.3 V≤V
CC
≤V
CC(MAX)
V
V
V/V
V
V
V
mA
5
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QW-R121-018 .C
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