DS2745 데이터 시트보기 (PDF) - Maxim Integrated

부품명

상세내역

제조사

DS2745

Low-Cost I2C Battery Monitor

Maxim Integrated 

DS2745 Low-Cost I2C Battery Monitor

DETAILED DESCRIPTION

Current is measured bidirectionally over a dynamic range of ±51.2mV with a resolution of 1.56V. Assuming a

15m sense resistor, the current sense range is ±3.4A, with a 1 LSB resolution of 104A. 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 I2C interface, the DS2745 allows a host system read/write access to the Status, Configuration

and Measurement registers. Additionally, the I2C slave address can be changed from the default after power up.

Figure 3. APPLICATION EXAMPLE

PACK+

1 Cell Li+

Protection IC

(Li+/Polymer)

102

102

500

1k

5.6V

103

(1)

DS2745

PIO

VSS

VIN

VDD

CTG

SNS

SCL

SDA

RSNS

2.5V (1)

150 CLOCK

150 DATA

5.6V 5.6V

(1) (1)

PACK -

(1) Optional for 8kV/15kV ESD

FuelPack is a trademark of Maxim Integrated Products, Inc.

6 of 15

Share Link: