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PDF LC709203F Data sheet ( Hoja de datos )
| Número de pieza | LC709203F | |
| Descripción | Battery Fuel Gauge LSI | |
| Fabricantes | ON Semiconductor | |
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LC709203F
Smart LiB Gauge
Battery Fuel Gauge LSI
for 1-Cell Lithium-ion (Li+)
Overview
LC709203F is a Fuel Gauge for a single lithium ion battery. 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-CVR. The HG-CVR algorithm eliminates the use of a sense
resistor and 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.
LC709203F is available in two small packages realizing the industries
smallest PCB footprint for the complete solution. It has minimal
parameters to be set by the user enabling simple, quick setup and
operation.
www.onsemi.com
WDFN8 3x4, 0.65P
Pb-Free, Halogen Free type
Features
HG-CVR algorithm technology
No external sense resistor
2.8% accuracy of RSOC
Accurate RSOC of aging battery
Automatic convergence of error
Adjustment for the parasitic impedance around the battery
Simple and Quick Setup
Low power consumption
3μA Operational mode
Precision Voltage measurement
±7.5mV
Precision Timer
±3.5%
Alerts for Low RSOC and / or Low Voltage
Temperature compensation
Sense Thermistor input
Via I2C
Detect Battery insertion
I2C Interface (up to 400 kHz supported)
WLCSP9, 1.60x1.76
Pb-Free, Halogen Free type
ORDERING INFORMATION
See detailed ordering and shipping information in the
package dimensions section on page 23 of this data sheet
Applications
Wireless Handsets
Smartphones / PDA devices
MP3 players
Digital cameras
Portable Game Players
USB-related devices
* I2C Bus is a trademark of Philips Corporation.
© Semiconductor Components Industries, LLC, 2015
March 2015- Rev. 8
1
Publication Order Number:
LC709203F/D
1 page  
LC709203F
Table 2. Absolute Maximum Ratings at Ta = 25C, VSS = 0V
Parameter
Symbol
Maximum supply
voltage
Input voltage
Output voltage
Input/output
voltage
Allowable power
dissipation
VDD max
VI (1)
Vo (1)
Vo (2)
VIO (1)
Pd max
Operating ambient
temperature
Storage ambient
temperature
Topr
Tstg
Pin/Remarks
VDD
TSENSE
TSW
ALARMB
SDA, SCL
WDFN8
WLP9
Conditions
VDD [ V ]
Ta = 40 to +85C
Specification
min typ max
0.3
+6.5
0.3
0.3
VDD
+0.3
VDD
+0.3
0.3
0.3
+5.5
480
210
40 +85
55 +125
Unit
V
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 at Ta = 40 to +85C, VSS = 0V
Parameter
Operating supply
voltage
High level input
voltage
Symbol
VDD (1)
VIH (1)
VIH (2)
Pin/Remarks
VDD
TSENSE
ALARMB, SDA, SCL
Conditions
VDD [ V ]
Specification
min typ max
2.5 4.5
2.5 to 4.5
0.7VDD
2.5 to 4.5
1.4
VDD
Low level input
voltage
VIL (1)
VIL (2)
TSENSE
ALARMB, SDA, SCL
2.5 to 4.5
2.5 to 4.5
VSS
0.25VDD
0.5
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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5
5 Page 
LC709203F
Before RSOC (0x04)
This LSI obtains Open Circuit Voltage (OCV) reading 10 ms
after Power-on reset to initialize RSOC (See figure 7).
Or the LSI can be forced to initialize RSOC by sending the
Before RSOC Command (004 = AA55) or the Initial RSOC
Command (007 = AA55). The accuracy of the Initialization
requires the OCV reading to be taken with minimal load or
charge, under 0.025C, on the battery. (i.e. less than 75mA for
3000mAh design capacity battery.).
The LSI initializes RSOC by the maximum voltage between
initialize after Power-on reset and setting the command when the
Before RSOC command is written. (See figure 8).
Thermistor B (0x06)
Sets B-constant of the thermistor to be measured. Refer to the
specification sheet of the thermistor for the set value to use.
Initial RSOC (0x07)
The LSI can be forced to initialize RSOC by sending the Before
RSOC Command (004 = AA55) or the Initial RSOC Command
(007 = AA55).
Figure 7. RSOC automatic initialization
The LSI initializes RSOC by the measured voltage at that
time when the Initial RSOC command is written. (See
figure 9). The maximum time to initialize RSOC after the
command is written is 1.5 ms.
Cell Temperature (0x08)
This register contains the cell temperature from 20C (009E4)
to +60C (00D04) measured in 0.1C units.
In the Thermistor mode (016 = 01) the LSI measures the
attached thermistor and loads the temperature into the Cell
Temperature register. In the Thermistor mode, the thermistor
shall be connected to the LSI as shown in figure 2. The
temperature is measured by having TSW pin to provide power
into the thermistor and TSENSE pin to sense the output voltage
from the thermistor. Temperature measurement timing is
controlled by the LSI, and the power to the thermistor is not
supplied for other reasons except to measure the temperature.
In the I2C mode (016 = 00) the temperature is provided by the
host processor. During discharge/charge the register should be
updates when the temperature changes more than 1C
Cell Voltage (0x09)
This register contains the voltage on VDD 1mV units.
Current Direction (0x0A)
This register is used to control the reporting of RSOC. In Auto
mode the RSOC is reported as it increases or decreases. In
Charge mode the RSOC is not permitted to decrease. In
Discharge mode the RSOC is not permitted to increase.
With consideration of capacity influence by temperature, we
recommend operating in Auto because RSOC is affected by the
cell temperature. A warm cell has more capacity than a cold cell.
Be sure not to charge in the Discharge mode and discharge in the
Charge mode; it will create an error.
An example of RSOC reporting is shown in Figures 10 and 11.
Figure 8. Before RSOC command
Figure 9. Initial RSOC command
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11
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