Data Sheet
13
PWPD
VPU
VPU
SDA
SCL
R2
5.1 k
PGND
C1
0.47 µF
R3
5.1 k
1
SDA
2
SCL
3
VSS
4
NC
5
VDD
6
BAT
U1
GPOUT
12
NC
11
BIN
10
NC
9
SRP
8
SRN
7
R4
5.1 k
R5
1.8 M
GPOUT
BIN
PGND
PGND
PACKP
3
3
BIN
2
2
PACKN
1
1
J5
BIN
C2
1.0uF
R1
0.010
Note: 1% Tol.
System Load/Charger
VSYS
PGND
bq27441-G1
www.ti.com
SLUSBH1C –NOVEMBER 2013–REVISED DECEMBER 2014
10 Application and Implementation
NOTE
Information in the following application section is not part of the TI component
specification, and TI does not warrant its accuracy or completeness. TI’s customers are
responsible for determining suitability of components for their purposes. Customers should
validate and test their design implementation to confirm system functionality.
10.1 Application Information
The bq27441-G1 fuel gauge is a microcontroller peripheral that provides system-side fuel gauging for single-cell
Li-Ion batteries. The device requires minimal configuration and uses One Time Programmable (OTP) Non-
Volatile Memory (NVM). Battery fuel gauging with the fuel gauge requires connections only to PACK+ and
PACK– for a removable battery pack or embedded battery circuit. To allow for optimal performance in the end
application, special considerations must be taken to ensure minimization of measurement error through proper
printed circuit board (PCB) board layout. Such requirements are detailed in Design Requirements.
10.2 Typical Applications
Figure 6. Typical Application
10.2.1 Design Requirements
As shipped from the Texas Instruments factory, many bq27441-G1 parameters in OTP NVM are left in the
unprogrammed state (zero) while some parameters directly associated with the CHEMID are preprogrammed.
This partially programmed configuration facilitates customization for each end application. Upon device reset, the
contents of OTP are copied to associated volatile RAM-based Data Memory blocks. For proper operation, all
parameters in RAM-based Data Memory require initialization — either by updating Data Memory parameters in a
lab/evaluation situation or by programming the OTP for customer production. Chapter 6 in the bq27441-G1
Technical Reference Manual (SLUUAC9) shows the default value and a typically expected value appropriate for
most of applications.
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