DS2745 Maxim Integrated Products, DS2745 Datasheet - Page 6
DS2745
Manufacturer Part Number
DS2745
Description
Low-Cost I2C Battery Monitor
Manufacturer
Maxim Integrated Products
Datasheet
1.DS2745.pdf
(15 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
DS2745U
Manufacturer:
MAXIM/美信
Quantity:
20 000
Company:
Part Number:
DS2745U+
Manufacturer:
Maxim
Quantity:
2 505
Company:
Part Number:
DS2745U+T&R
Manufacturer:
APT
Quantity:
1 200
Part Number:
DS2745U+T&R
Manufacturer:
MAXIM/美信
Quantity:
20 000
Part Number:
DS2745U+TR
Manufacturer:
MAXIM/美信
Quantity:
20 000
DETAILED DESCRIPTION
Current is measured bidirectionally over a dynamic range of ±51.2mV with a resolution of 1.56V. Assuming a
15m sense resistor, the current sense range is ±3.4A, with a 1 LSB resolution of 104A. Current measurements
are performed at regular intervals and accumulated with each measurement to support accurate “coulomb
counting”. Each current measurement is reported with sign and magnitude in the two-byte Current register. The
Accumulated Current register (ACR) reports the coulomb count and supports a wide range of battery sizes. Battery
voltage measurements are reported in the two-byte Voltage register with 11-bit (4.88mV) resolution, and
Temperature is reported in the two-byte Temperature register with 0.125C resolution.
The DS2745 measurements can be used directly to provide accurate fuel gauging in typical use conditions, or
along with FuelPack™ algorithms to form a complete and accurate solution for estimating remaining capacity over
wide temperature and operating conditions.
Through its two wire I
and Measurement registers. Additionally, the I
Figure 3. APPLICATION EXAMPLE
FuelPack is a trademark of Maxim Integrated Products, Inc.
1 Cell Li+
(Li+/Polymer)
Protection IC
2
102
C interface, the DS2745 allows a host system read/write access to the Status, Configuration
102
103
500
2
C slave address can be changed from the default after power up.
5.6V
(1)
1k
6 of 15
PIO
VSS
VIN
VDD
2.5V
DS2745
R
SNS
(1)
CTG
SNS
SDA
SCL
(1) Optional for 8kV/15kV ESD
DS2745 Low-Cost I
5.6V
(1)
5.6V
(1)
150
150
PACK+
CLOCK
DATA
PACK -
www.DataSheet4U.com
2
C Battery Monitor