Document
Smart LiB Gauge Battery Fuel Gauge LSI For 1‐Cell Lithium‐ion/ Polymer (Li+)
LC709203F
Overview LC709203F is a Fuel Gauge for a single lithium ion/polymer
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.
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
♦ 3 mA Operational Mode
• Precision Voltage Measurement
♦ ±7.5 mV
• 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)
• These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS
Compliant
Applications
• Wireless Handsets
• Smartphones/PDA Devices
• MP3 Players
• Digital Cameras
• Portable Game Players
• USB-related Devices
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WDFN8 CASE 509AF
WLCSP9 CASE 567JH
MARKING DIAGRAMS
WDFN8
9203F **
ASWLYW G
9203F** = Specific Device Code ** = 01 (LC709203FQH−01TWG)
02 (LC709203FQH−02TWG) 03 (LC709203FQH−03TWG) 04 (LC709203FQH−04TWG) AS = Assembly Location WL = Lot Number YW = Work Week G = Pb−Free Package
(Note: Microdot may be in either location)
WLCSP9
203** YMXXX
203** **
Y M XXX
= Specific Device Code = 01 (LC709203FXE−01MH)
02 (LC709203FXE−02MH) 03 (LC709203FXE−03MH) 04 (LC709203FXE−04MH) 05 (LC709203FXE−05MH) = Year = Month Code = Lot Number
ORDERING INFORMATION
See detailed ordering and shipping information on page 19 of this data sheet.
© Semiconductor Components Industries, LLC, 2015
January, 2020 − Rev. 16
1
Publication Order Number: LC709203F/D
Application Circuit Example T
LC709203F
10 kW 10 kW
System VDD
I2C Bus VDD Master
SCL SDA TSENSE TSW
PACK− PACK+
Battery Pack
LC709203F
ASIC
TEST VSS VDD ALARMB
10 kW
1 mF
System
Interrupt Input VSS
System VSS
Figure 1. Example of an Application Schematic using LC709203F (Temperature Input via I2C)
Battery Pack
10 kW Thermistor
T
SCL SDA
100 W TSENSE
TSW
10 kW 10 kW
10 kW (same as Thermistor Resistance Value)
System VDD
I2C Bus VDD Master
LC709203F
ASIC
TEST VSS VDD ALARMB
PACK− PACK+
10 kW
1 mF
System
Interrupt Input VSS
System VSS
Figure 2. Example of an Application Schematic using LC709203F (The Temperature is Measured Directly by a Thermistor)
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LC709203F
SDA SCL
TSW
TSENSE VDD VSS
I2C Interface
VDD Drv
ADC
Look Up Table for Internal Battery Impedance & OCV
Voltage Sense
Timer
Reference Voltage
Power On Reset
Processing Unit
ALARMB TEST
Figure 3. Simplified Block Diagram
WDFN8 3x4, 065P “Pb-Free, Halogen Free Type”
(Bottom View)
WLCSP9 1.60x1.76 “Pb-Free, Halogen Free Type”
(Bottom View)
TEST VSS VDD ALARMB
1234 9
8765
C1 C2 C3
SDA SCL TSENSE
B1 B2 B3
TEST NC
TSW
A1 A2 A3
VSS ALARMB VDD
Figure 4. Pin Assignment
SCL SDA TSENSE TSW
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LC709203F
Table 1. PIN FUNCTION
WDFN8
WLP9 Pin Name
I/O
Description
1
B1 TEST
I Connect this pin to VSS.
2
A1 VSS
− Connect this pin to the battery’s negative (−) pin.
3
A3 VDD
− Connect this pin to the battery’s positive (+) pin.
4
A2 ALARMB
O This pin indicates alarm by low output(open drain). Pull-up must be done externally.
Alarm conditions are specified by registers (0x13 or 0x14).
Connect this pin to VSS when not in use.
5
B3 TSW
O Power supply output for thermistor. This pin goes HIGH during temperature read operation. Resistance value of TSW (for thermistor pull-up) must be the same value
as the thermistor. (Note 1)
6
C3 TSENSE
I Thermistor sense input. If you connect this pin to thermistor, insert 100 W resistance
between them for ESD. (Note 1)
7 C1 SDA I/O I2C Data pin (open drain). Pull-up must be done externally. 8 C2 SCL I/O I2C Clock pin (open drain). Pull-up must be done externally.
− B2 NC − Don’t care.
9 − Exposed − Don’t care. PAD
1. TSW and TSENSE must be disconnected as Figure 1 when not in use.
Table 2. ABSOLUTE MAXIMUM RATINGS (TA = 25°C, VSS = 0 V)
Specification
Parameter Maximum Supply Voltage Input Voltage Output Voltage
Input/Output Voltage Allowable Power Dissipation
Symbol VDD max
VI (1) Vo (1) Vo (2) VIO (1) Pd max
Pin/Remarks VDD
.