UNISONIC TECHNOLOGIES CO., LTD UB264B

UNISONIC TECHNOLOGIES CO., LTD
UB264B
Preliminary
CMOS IC
LION BATTERY PROTECTION
IC FOR 2-SERIAL, 3-SERIAL,
OR 4-SERIAL-CELL PACK
(SECONDARY PROTECTION)
„
DESCRIPTION
The UTC UB264B Series is secondary protection IC for 2-, 3-, or
4-Cell lithium-ion rechargeable battery packs, and incorporates a
high-accuracy voltage detection circuit.
The UTC UB264B Series also includes a high accuracy delay
circuit for over voltage detection time without external capacitors.
„
*
*
*
*
*
*
*
*
*
„
FEATURES
High-accuracy voltage detection circuit for each cell
Overcharge detection voltage n (n=1 to 4): 4.30V to 4.80V (in
50mV steps)
Overcharge hysteresis voltage n (n=1 to 4): -0.52V±0.21V,
−0.39V±0.16V, −0.26V±0.11V, −0.13V±0.06V, None
Delay times for overcharge detection can be set by an internal
circuit without external capacitors
Output latch function after overcharge detection
CMOS output active “H”
Wide operating voltage range 3.6V to 24V
Wide operating temperature range −40°C to +85°C
Low current consumption: 2.5μA typ. (+25°C) at 3.5V for
each cell
ORDERING INFORMATION
Note:
Ordering Number
Lead Free
Halogen Free
UB264BL-P08-R
UB264BG-P08-R
xx: SERIAL CODE, refer SERIAL CODE LIST.
www.unisonic.com.tw
Copyright © 2012 Unisonic Technologies Co., Ltd
Package
Packing
TSSOP-8
Tape Reel
1 of 10
QW-R502-833.A
UB264B
Preliminary
„
PIN CONFIGURATION
„
PIN DESCRIPTION
PIN NO.
1
2
PIN NAME
VDD
SENSE
3
VC1
4
VC2
5
VC3
6
VSS
7
8
CTL
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
Overcharge detection latch reset pin
FET gate connection pin for charge
SERIAL CODE LIST
MODEL
CODE
OVERCHARGE
DETECTION
VOLTAGE
[VCU](V)
OVERCHARGE
HYSTERSIS
VOLTAGE
[VHC](V)
OVERCHARGE
DETECTION
DELAY TIME
[tCU](S)
OVERCHARGE
RELEASE
DELAY TIME
[tCL](mS)
AA
4.45±0.050
-0.39±0.16
4.0±1.0
60.0±20.0
AB
4.35±0.050
-0.39±0.16
4.0±1.0
60.0±20.0
AC
4.50±0.050
-0.39±0.16
4.0±1.0
60.0±20.0
AD
4.35±0.050
-0.39±0.16
2.0±0.5
30.0±10.0
AE
4.30±0.050
-0.39±0.16
4.0±1.0
60.0±20.0
AF
4.45±0.050
-0.39±0.16
2.0±0.5
30.0±10.0
AG
4.30±0.050
-0.39±0.16
2.0±0.5
30.0±10.0
AH
4.40±0.050
-0.39±0.16
4.0±1.0
60.0±20.0
UB264B
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
OUTPUT FORM
CMOS output
active “H”
CMOS output
active “H”
CMOS output
active “H”
CMOS output
active “H”
CMOS output
active “H”
CMOS output
active “H”
CMOS output
active “H”
CMOS output
active “H”
2 of 10
QW-R502-833.A
UB264B
„
Preliminary
CMOS IC
BLOCK DIAGRAM
SENSE
VC1
Overcharge
Detector 1
VC2
Overcharge
Detector 2
Oscillator
VDD
Divider
CO
Control
Logic
CTL
Overcharge
Detector 3
VC3
Overcharge
Detector 4
VSS
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
3 of 10
QW-R502-833.A
UB264B
„
Preliminary
CMOS IC
ABSOLUTE MAXIMUM RATING (TA=25°C, unless otherwise specified)
PARAMETER
SYMBOL
RATINGS
UNIT
Input Voltage Between VDD And VSS
VDS
VSS −0.3 ~ VSS+26
V
Input Pin Voltage
VIN
VSS −0.3 ~ VDD+0.3
V
CO Output Pin Voltage
VCO
VSS −0.3 ~ VDD+0.3
V
Power Dissipation (Note 2)
PD
650
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
SYMBOL
TEST CONDITIONS
DETECTION VOLTAGE
Overcharge Detection Voltage
VCUn
4.30 ~ 4.80 V, adjustable
n (n = 1, 2, 3, 4)
VHCn=−0.52 ±0.21V, −0.39 ±0.16V,
Overcharge Hysteresis
VHCn
Voltage n (n = 1, 2, 3, 4)
−0.26 ±0.11V, −0.13 ±0.06V, None
DELAY TIME
Overcharge Detection Delay
tCU
Time
For AD, AF and AG products
Overcharge Release Delay
tCL
Time
For AD, AF and AG products
Overcharge Timer Reset
tTR
Delay Time
For AD, AF and AG products
Transition Time To Test
tTST
Mode(Note1)
For AD, AF and AG products
CTL Pin Response Time
tCTL
INPUT VOLTAGE
Operating Voltage Between
VDSOP
VDD And VSS
CTL Input “H” Voltage
VCTLH
CTL Input “L” Voltage
VCTLL
INPUT CURRENT
Current Consumption During
IOPE
V1=V2=V3=V4=3.5V
Operation
Current Consumption During
IOPED V1=V2=V3=V4=2.3V
Overdischarge
SENSE Pin Current
ISENSE V1=V2=V3=V4=3.5V
VC1 Pin Current
IVC1
V1=V2=V3=V4=3.5V
VC2 Pin Current
IVC2
V1=V2=V3=V4= 3.5 V
VC3 Pin Current
IVC3
V1=V2=V3=V4=3.5 V
CTL Pin “H” Current
ICTLH
V1=V2=V3=V4=3.5 V, VCTL=VDD
CTL Pin “L” Current
ICTLL
V1=V2=V3=V4=3.5 V, VCTL=0 V
OUTPUT CURRENT
CO Pin Sink Current
ICOL
VCOP=VSS+0.5V
CO Pin Source Current
ICOH
VCOP=VDD−0.5V
Note: 1. Test conditions: V1=V2= V3=V4=3.5 V, VDD ≥ VSENSE + 8.5V.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
MIN
TYP
MAX
UNIT
VCUn−
0.050
VCUn
VCUn+
0.050
V
VHCn
3.0
1.5
40
20
10
5
40
20
4.0
2.0
60
30
15
7.5
60
30
3.6
V
5.0
2.5
80
40
20
10
80
40
3.0
24
VDD×
0.95
-0.5
-0.5
-0.5
1.0
-0.1
0.4
20
s
ms
ms
ms
ms
V
V
VDD×
0.4
V
2.5
10
μA
2.0
10
μA
1.5
0
0
0
1.5
6.0
0.5
0.5
0.5
2.0
μA
μA
μA
μA
μA
μA
mA
μA
4 of 10
QW-R502-833.A
UB264B
„
Preliminary
CMOS IC
OPERATING
1. Overcharge Detection
Under normal conditions, when the voltage of any one cell battery exceeds the overcharge detection voltage (VCU)
during charging, and after the state is retained for the overcharge detection delay time (tCU), CO will become “H”.
This state is called overcharge. Attaching FET to the CO pin provides charge control and a second protection.
Only the voltage of all the batteries decreases below the total of the overcharge detection voltage (VCU) and the
overcharge hysteresis voltage (VHC) and the state is retained for the overcharge release delay time (tCL) or longer,
the overcharge status is released; however, CO stays at “H”. When the CTL pin is switched from “L” to “H”, CO
becomes “L”.
2. Overcharge Timer Reset
When an overcharge release noise that forces the voltage of the battery temporarily below the overcharge
detection voltage (VCU) is input during the overcharge detection delay time (tCU) from when VCU is exceeded to when
charging is stopped, tCU is continuously counted if the time the overcharge release noise persists is shorter than the
overcharge timer reset delay time (tTR). Under the same conditions, if the time the overcharge release noise persists
is tTR or longer, counting of tCU is reset once. After that, when VCU has been exceeded, counting tCU resumes.
3. CTL Pin
The CTL pin is used to control the output voltage of the CO pin. In the UTC UB264B Series, when the CTL pin is
switched from “L” to “H”, a reset signal is output to the overcharge detection latch and CO becomes “L”.
CTL PIN
CO PIN
“H”
Without latch
Open
Normal state (Note 1)
“L”
Normal state (Note 1)
“L”→ “H”
Latch reset (Note 2)
“H” →“L”
Notes: 1. The state is controlled by the overcharge detection circuit.
2. Latch reset becomes effective when the voltages of all the
batteries are lower than the total of the overcharge detection
voltage (VCU) and the overcharge hysteresis voltage (VHC) and the
overcharge release delay time (tCL) has elapsed.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
5 of 10
QW-R502-833.A
UB264B
„
Preliminary
CMOS IC
OPERATING(Cont.)
Notes:
1.
2.
3.
The reverse voltage “H” to “L” or “L” to “H” of CTL pin is VDD pin voltage −2.8 V (Typ.), does not have
the hysteresis.
Since the CTL pin implements high resistance of 8MΩ to 12MΩ for pull down, be careful of external
noise application. If an external noise is applied, CO may become “H”. Perform thorough evaluation
using the actual application.
In the UTC UB264B Series, when the CTL pin is open or “L”, CO latches “H”. When the VDD pin
voltage is decreased to the UVLO voltage of 2 V (Typ.) or lower, the latch is reset.
4. Test Mode
In the UTC UB264B Series, the overcharge detection delay time (tCU) can be shortened by entering the test mode.
The test mode can be set by retaining the VDD pin voltage 8.5 V or more higher than the SENSE pin voltage for at
least 80ms (V1=V2=V3=V4=3.5 V, Ta=25°C). The status is retained by the internal latch and the test mode is
retained even if the VDD pin voltage is decreased to the same voltage as that of the SENSE pin. When CO becomes
“H” when the delay time has elapsed after overcharge detection, the latch for retaining the test mode is reset and the
UTC UB264B Series exits from the test mode.
VDD pin voltage SENSE pin voltage
>8.5V
Pin voltage
VCUn
VHCn
Battery voltage
(n=1 to 4)
Test mode
tTST
CO Pin
tCU/64
Notes:
1.
2.
3.
4.
tCL
When the VDD pin voltage is decreased to lower than the UVLO voltage of 2 V (Typ.), the UTC
UB264B Series returns to the normal mode.
Set the test mode when no batteries are overcharged.
The overcharge release delay time (tCL) is not shortened in the test mode.
The overcharge timer reset delay time (tTR) is not shortened in the test mode.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
6 of 10
QW-R502-833.A
UB264B
„
Preliminary
CMOS IC
TIMING CHARTS
1. Overcharge Detection Operation
VHCn
VCUn
Battery voltage
(n=1 to 4)
CTL Pin
tTR or
longer
CO Pin
tTR or shorter
tCU or shorter
tCU
tCL
2. Overcharge Timer Reset Operation
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
7 of 10
QW-R502-833.A
UB264B
„
Preliminary
CMOS IC
TYPICAL APPLICATION CIRCUIT
1. 4-serial cell
SC Protector
RVDD
EB+
VDD
CVDD
SENSE
BAT1
BAT2
BAT3
R1
R2
R3
C1
VC1
C2
UTC
UB264B
VC2 Series
VC3
BAT4
R4
FET
C3
CO
DP
C4
VSS
CTL
External
input
RCTL
EB-
2. 3-serial cell
SC Protector
RVDD
EB+
VDD
CVDD
SENSE
BAT1
BAT2
BAT3
R1
R2
R3
C1
VC1
C2
UTC
UB264B
VC2 Series
FET
C3
VC3
CO
DP
VSS
CTL
External
input
RCTL
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
EB-
8 of 10
QW-R502-833.A
UB264B
„
Preliminary
CMOS IC
TYPICAL APPLICATION CIRCUIT(Cont.)
3. 2-serial cell
SC Protector
RVDD
EB+
VDD
CVDD
SENSE
BAT1
BAT2
R1
R2
C1
VC1
C2
UTC
UB264B
VC2 Series
VC3
CO
FET
DP
VSS
CTL
External
input
RCTL
EB-
Constants for External Components
NO.
1
2
3
4
Notes: 1.
2.
3.
4.
5.
6.
7.
8.
PART
MIN
TYP
MAX
UNIT
R1 to R4
0.1
1
10
KΩ
C1 to C4, CVDD
0.01
0.1
1
μF
RVDD
50
100
500
Ω
RCTL
0
100
500
Ω
the examples of connection shown above and the constants will not guarantee successful operation.
Perform thorough evaluation using the actual application to set the constant.
Set the same constants to R1 to R4 and to C1 to C4 and CVDD.
Set RVDD, C1 to C4 and CVDD so that the condition (RVDD) × (C1 to C4, CVDD) ≥ 5 × 10−6 is satisfied.
T Set R1 to R4, C1 to C4, and CVDD so that the condition (R1 to R4) × (C1 to C4, CVDD) ≥ 1 × 10−4 is
satisfied.
In some application circuits, even if an overcharged battery is not included, the order of connecting
batteries may be restricted to prevent transient output of CO detection pulses when the batteries are
connected. Perform thorough evaluation with the actual application circuit.
Since “H” may be output at CO transiently when the battery is being connected, connect the positive
terminal of BAT1 last in order to prevent the three terminal protection fuse from cutoff.
Before the battery connection, short-circuit the battery side pins RVDD and R1.
In the UTC UB264B Series, normally input “L” to the external input, and input “H” when releasing the
latch that maintains CO at “H” after overcharge detection.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
9 of 10
QW-R502-833.A
UB264B
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.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
10 of 10
QW-R502-833.A