Battery Fuel Gauge LSI
[Smart LiB Gauge]
for 1-Cell Lithium-ion/
Polymer (Li+) with Low Power
2
mA
Operation
LC709204F
Overview
www.onsemi.com
LC709204F is a Fuel Gauge for 1−Cell Lithium−ion/Polymer
batteries. It is part of our
Smart LiB Gauge
family of Fuel Gauges
which measure the battery RSOC (Relative State Of Charge) using its
unique algorithm called
HG−CVR2.
The
HG−CVR2
algorithm
provides accurate RSOC information even under unstable conditions
(e.g. changes of battery; temperature, loading, aging and
self−discharge). An accurate RSOC contributes to the operating time
of portable devices. The Fuel Gauge (in other words, Gas Gauge,
Battery Monitor or Battery Gauge) feature of
HG−CVR2
algorithm
makes LSI highly applicable in various application. The LSI can
immediately start battery measurement by setting a few parameters
after battery insertion. Learning cycles that make complicated
manufacturing process of applications can be avoided.
The LSI also supports battery safety by alarm functions and SOH
(State of Health) reporting to the application processor. The operating
consumption current is very low 2
mA
and it is suitable for applications
such as wearables and 1 series N parallel batteries.
Features
♦
WLCSP12 1.48x1.91x0.51
CASE 567XE
MARKING DIAGRAM
204**
AWLYW
204**
A
WL
YW
= 20401 (LC709204FXE−01TBG)
= Assembly Site
= Wafer Lot Number
= Assembly Start Week
•
HG−CVR2
Algorithm Technology
•
•
•
•
•
•
•
•
•
Small Footprint: No Need for Current Sensing Resistor
♦
Accurate RSOC of Aging Battery
♦
Stable Gauging by Automatic Convergence of Error
♦
Immediate Accurate Gauging after Battery Insertion
♦
Eliminates Learning Cycle
Low Power Consumption
♦
2
mA
Operational Mode Current
Improvement of the Battery Safety by Alarm Function
RSOC / Voltage / Temperature
Battery Lifetime Measurement
SOH / Cycle Count / Operating Time
Remaining Time Estimation
Time to Full / Time to Empty
Three Temperature Inputs
♦
Inputs to sense two NTC Thermistors
♦
Via I
2
C
Detection of Battery Operating Conditions
Charging / Discharging
Detection of Battery Insertion
I
2
C Interface (supported up to 400 kHz)
These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS
Compliant
ORDERING INFORMATION
See detailed ordering and shipping information on page 20 of
this data sheet.
Applications
•
•
•
•
•
Wearables / IoT Devices
Smartphones/PDA Devices
Digital Cameras
Portable Game Players
USB-related Devices
©
Semiconductor Components Industries, LLC, 2019
September, 2019
−
Rev. 0
1
Publication Order Number:
LC709204F/D
LC709204F
Table 1. PIN FUNCTION
WLCSP12
A1
B1
C1
A2
B2
C2
A3
B3
C3
A4
B4
C4
Name
SDA
SCL
ALARMB
V
SS
TEST2
TEST1
REG
TSENSE2
NF1
VDD
TSENSE1
NF2
I/O
I/O
I/O
O
−
I
I
O
I/O
−
−
I/O
−
Description
I
2
C Data pin (open drain). Pull−up must be done externally.
I
2
C Clock pin (open drain). Pull−up must be done externally.
This pin indicates alarm by low output (open drain). Pull−up must be done externally.
Keep this pin OPEN when not in use.
Connect this pin to the battery’s negative (−) pin.
Connect this pin to the battery’s negative (−) pin.
Connect this pin to the battery’s negative (−) pin.
Regulator output. Connect this pin to the capacitor.
Sense input and power supply for a thermistor. Connect 10 kW NTC thermistor to measure “Ambient
temperature (0x30)”. Keep this pin OPEN when not in use.
No function pin. Keep this pin OPEN. Short−pin with TSENSE2 is permitted to pull out it.
Connect this pin to the battery’s positive (+) pin.
Sense input and power supply for a thermistor. Connect 10 kW NTC thermistor to measure “Cell
temperature (0x08)”. Keep this pin OPEN when not in use.
No function pin. Keep this pin OPEN.
Table 2. ABSOLUTE MAXIMUM RATINGS
(T
A
= 25°C, V
SS
= 0 V)
Specification
Parameter
Maximum Supply Voltage
Input Voltage
Output Voltage
Symbol
V
DD
max
V
I
(1)
V
o
(1)
Pin/Remarks
VDD
ALARMB, SDA,
SCL, NF1, NF2
REG,
TSENSE1,
TSENSE2
T
A
=
−40
to
+85_C
Conditions
V
DD
(V)
−
−
−
Min
−0.3
−0.3
−0.3
Typ
−
−
−
Max
+6.5
+6.5
+4.6
Unit
V
Allowable Power Dissipation
Operating Ambient Temperature
Storage Ambient Temperature
P
d max
T
aopr
T
stg
−
−
−
−
−40
−40
−
−
−
150
+85
+125
mW
_C
Stresses exceeding those listed in the Maximum Ratings table may damage the device. If any of these limits are exceeded, device functionality
should not be assumed, damage may occur and reliability may be affected.
Table 3. ALLOWABLE OPERATING CONDITIONS
(T
A
=
−40
to +85°C, V
SS
= 0 V)
Specification
Parameter
Operating Supply Voltage
Symbol
V
DD
(1)
Pin/Remarks
VDD
Conditions
V
DD
(V)
−
Min
2.5
Typ
−
Max
5.0
Unit
V
Functional operation above the stresses listed in the Recommended Operating Ranges is not implied. Extended exposure to stresses beyond
the Recommended Operating Ranges limits may affect device reliability.
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4
LC709204F
Table 4. ELECTRICAL CHARACTERISTICS
(T
A
=
−40
to +85°C, V
SS
= 0 V, Typ: 4 V, T
A
= 25°C)
Parameter
LDO
LDO Output Voltage
Operational Mode
V
REG
I
DD
(1)
REG
VDD
2.5 to 5.0
2.5 to 5.0
Ta =
−20_C
to +70_C
Average current with 0.01C
Constant discharge.
Ta =
−20_C
to +70_C
ALARMB,
SDA, SCL
ALARMB,
SDA, SCL
ALARMB,
SDA, SCL,
NF1, NF2
ALARMB,
SDA, SCL,
NF1, NF2
ALARMB,
SDA, SCL
ALARMB,
SDA, SCL
TSENSE1,
TSENSE2
TSENSE1, Ta =
−20_C
to +70_C
TSENSE2
V
IN
= V
DD
(including output transistor
off leakage current)
V
IN
= V
SS
(including output transistor
off leakage current)
I
OL
= 3.0 mA
I
OL
= 1.3 mA
2.5 to 5.0
2.5 to 5.0
2.5 to 5.0
2.5 to 5.0
1.4
2.3
2.7
2
3.0
V
μA
CONSUMPTION CURRENT
Symbol
Pin/
Remarks
Specification
Conditions
V
DD
[V]
Min
Typ
Max
Unit
Sleep Mode
INPUT / OUTPUT
High Level Input
Voltage
Low Level Input
Voltage
High Level Input
Current
Low Level Input
Current
Low Level Output
Voltage
Hysteresis Voltage
Pull−up Resistor
Resistance
Pull−up Resistor
Temperature
Coefficient
POWER ON RESET
Reset Release Voltage
Initialization Time after
Reset Release
TIMER
Time Measurement
Accuracy
BATTERY VOLTAGE
Voltage Measurement
Accuracy
I
DD
(2)
V
IH
V
IL
I
IH
1.3
5.5
0.5
1
mA
V
I
IL
2.5 to 5.0
−1
V
OL
(1)
V
OL
(2)
VHYS
Rpu
Rpuc
3.3 to 5.0
2.5 to 5.0
2.5 to 5.0
2.5 to 5.0
2.5 to 5.0
−0.05
0.2
10
0.4
0.4
V
kΩ
＋0.05
%/_C
V
RR
T
INIT
VDD
2.4 to 5.0
2.4
90
V
ms
T
ME
Ta = 25_C
2.5 to 5.0
−1
+1
%
V
ME
(1)
V
ME
(2)
VDD
Ta = +25_C
Ta =
−20_C
to +70_C
4
2.5 to 5.0
−7.5
−20
+7.5
+20
mV/cell
Product parametric performance is indicated in the Electrical Characteristics for the listed test conditions, unless otherwise noted. Product
performance may not be indicated by the Electrical Characteristics if operated under different conditions.
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