EEWORLDEEWORLDEEWORLD

Part Number

Search

DS2786BK

Description
Power Supply Support Circuit
CategoryPower/power management    The power supply circuit   
File Size356KB,21 Pages
ManufacturerMaxim
Websitehttps://www.maximintegrated.com/en.html
Download Datasheet Parametric Compare View All

DS2786BK Overview

Power Supply Support Circuit

DS2786BK Parametric

Parameter NameAttribute value
Is it Rohs certified?incompatible
MakerMaxim
package instruction,
Reach Compliance Codeunknown
ECCN codeEAR99
Analog Integrated Circuits - Other TypesPOWER SUPPLY SUPPORT CIRCUIT
Peak Reflow Temperature (Celsius)NOT SPECIFIED
Maximum time at peak reflow temperatureNOT SPECIFIED
Base Number Matches1
19-5223; Rev 1; 4/10
Stand-Alone OCV-Based Fuel Gauge
General Description
The DS2786B estimates available capacity for recharge-
able Li-ion (Li+) and Li+ polymer batteries based on the
cell voltage in the open-circuit state following a relax-
ation period. The open-circuit voltage (OCV) is used to
determine relative cell capacity based on a lookup table
stored in the IC. This capability makes accurate capacity
information available immediately after a battery pack is
inserted. During periods of moderate to high rate dis-
charging, which preclude OCV measurements, the
DS2786B uses coulomb counting as a secondary
means of estimating relative capacity.
Remaining capacity is reported in percent, along with
cell voltage, current, and temperature information. Cell
characteristics and application parameters used in the
calculations are stored in on-chip EEPROM.
The DS2786B is intended for use on the host side of
portable devices, though it can also be mounted within a
battery pack. Measurement and estimated capacity data
are accessed through an I
2
C interface. Temperature
data is available from an on-die sensor. Resistance mea-
surements of a pack identification resistor and pack ther-
mistor are supported by ratiometric measurements on
two auxiliary inputs.
The DS2786B comes in a 10-pin, lead-free, TDFN 3mm
x 3mm package with an exposed pad (EP).
Features
Relative Capacity Calculated from Combination
Coulomb Counter and Open-Circuit Cell Voltage
(OCV) Battery Model
Accurate Warning of Low-Battery Conditions
Even on First Cycle (No Learn Cycle Needed)
12-Bit Battery Voltage Measurement
±10mV Accuracy
1.22mV LSB, 0V to 4.5V Input Range
11-Bit Bidirectional Current Measurement
25µV LSB, ±51.2mV Dynamic Range
1.67mA LSB, ±3.4A (R
SNS
= 15mΩ)
Current Accumulation Measurement Resolution
±204.8mVh Range
±13.65Ah (R
SNS
= 15mΩ)
Internal Temperature Measurement
0.125°C LSB, ±3°C Accuracy
Two 11-Bit Auxiliary Input-Voltage Measurements
±8 LSB Accuracy, Ratiometric Inputs Eliminate
Supply Accuracy Issues
V
OUT
Pin Drives Resistive Dividers, Reduces
Current Consumption
2-Wire Interface
Low Power Consumption
Active Current: 50µA (typ), 80µA (max)
Sleep Current: 1µA (typ), 3µA (max)
DS2786B
Applications
3G Multimedia Wireless Handsets
Digital Still Cameras
Digital Audio (MP3) Players
PART
DS2786BG+
Ordering Information
TEMP RANGE
-20°C to +70°C
PIN-PACKAGE
10 TDFN-EP*
DS2786BG+T&R
-20°C to +70°C
10 TDFN-EP*
+Denotes
a lead(Pb)-free/RoHS-compliant package.
*EP
= Exposed pad.
T&R = Tape and reel.
Operating Diagram
V
OUT
V
IN
SYSTEM
μP
DS2786B
Li+
PROTECTION
CIRCUIT
THERMISTOR
PACKID
AIN0
AIN1
V
SS
SDA
SCL
SNS
I
2
C
INTERFACE
R
SNS
(EEPROM PROGRAMMING TEST POINT NOT SHOWN)
________________________________________________________________
Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.

DS2786BK Related Products

DS2786BK DS2786B DS2786BG+ DS2786BG+TR DS2786BG+T&R DS2786BG+T&R;
Description Power Supply Support Circuit Stand-Alone OCV-Based Fuel Gauge Stand-Alone OCV-Based Fuel Gauge Stand-Alone OCV-Based Fuel Gauge battery management stand-alone fuel gauge IC FUEL GAUGE OCV-BASED 10-TDFN

Recommended Resources

Power Management and Applications
ACPI is a more advanced and effective power management mode than APM. Using ACPI mode can save more power. What does this mean? The temperature of the CPUs that are "overclocked" by enthusiasts will b...
zbz0529 Power technology
MXCHIP Open1081——Summary of problems encountered in testing and discussion of solutions
Everyone has received the development board and has tried it out. Let's make a simple summary here and exchange ideas with each other:) Please leave a message for any problems you encounter during tes...
qq849682862 RF/Wirelessly
Audio and video storage issues
Hello everyone, my graduation project needs to realize the function of audio and video storage and playback. But I don't have experience and don't know how to start. I hope that experts can give me so...
img2007 Embedded System
What competitions are available at the moment?
What electronic competitions are available at the moment? Let's talk about it. :)...
beian10 Electronics Design Contest
Our country has developed a beautiful robot... Would you buy one?
[align=left][font=微软雅黑][size=3][color=#000000]Last year, the beauty robot product developed by Japanese scientific research institutions attracted the attention of media around the world. This year, t...
eric_wang Robotics Development
I have a question for you. Has anyone used m-sequence to generate Gaussian white noise? I need your advice!
I have a question, has anyone used m-sequence to generate Gaussian white noise? How do you choose and determine the series of the m-sequence and the frequency of the clock? How do you calculate the ba...
ye339067707 FPGA/CPLD

Popular Articles

EEWorld
subscription
account

EEWorld
service
account

Automotive
development
circle

Robot
development
community

Index Files: 2220  2619  2717  2734  2829  45  53  55  56  57 
Datasheet   0 1 2 3 4 5 6 7 8 9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Room 1530, 15th Floor, Building B, No. 18 Zhongguancun Street, Haidian District, Beijing Telephone: (010) 82350740 Postal Code: 100190
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved 京ICP证060456号 京ICP备10001474号-1 电信业务审批[2006]字第258号函 京公网安备 11010802033920号