Electronic Components Datasheet Search
  English  ▼

Delete All
ON OFF
ALLDATASHEET.COM

X  

Preview PDF HTML

BQ2050 Datasheet(PDF) 1 Page - Texas Instruments

Click here to check the latest version.
Part No. BQ2050
Description  Lithium Ion Power Gauge™ IC
Download  21 Pages
Scroll/Zoom Zoom In 100% Zoom Out
Maker  TI [Texas Instruments]
Homepage  http://www.ti.com
Logo 

BQ2050 Datasheet(HTML) 1 Page - Texas Instruments

 
Zoom Inzoom in Zoom Outzoom out
 1 / 21 page
background image
1
Features
➤ Conservative and repeatable
measurement of available capac-
ity in Lithium Ion rechargeable
batteries
➤ Designed for battery pack inte-
gration
- 120µA typical operating
current
- Small size enables imple-
mentations in as little as 1
2
square inch of PCB
➤ Integrate within a system or as a
stand-alone device
- Display capacity via single-
wire serial communication
port or direct drive of LEDs
➤ Measurements compensated for
current and temperature
➤ Self-discharge compensation us-
ing internal temperature sensor
➤ 16-pin narrow SOIC
General Description
The bq2050 Lithium Ion Power
Gauge™ IC is intended for battery-
pack or in-system installation to
maintain an accurate record of
available battery capacity. The IC
monitors a voltage drop across a
sense resistor connected in series
between the negative battery termi-
nal and ground to determine
charge and discharge activity of
the battery. Compensations for bat-
tery temperature and rate of charge
or discharge are applied to the
charge, discharge, and self-discharge
calculations to provide available ca-
pacity information across a wide
range of operating conditions. Bat-
tery capacity is automatically recali-
brated, or “learned,” in the course of
a discharge cycle from full to empty.
Nominal available capacity may be
directly indicated using a five-
segment LED display. These seg-
ments are used to graphically indi-
cate available capacity. The bq2050
supports a simple single-line bidi-
rectional serial link to an external
processor (common ground). The
bq2050 outputs battery information
in response to external commands
over the serial link.
The bq2050 may operate directly
from one cell (VBAT > 3V). With the
REF output and an external transis-
tor, a simple, inexpensive regulator
can be built for systems with more
than one series cell.
Internal registers include available
capacity, temperature, scaled avail-
able energy, battery ID, battery
status, and programming pin set-
tings. To support subassembly test-
ing, the outputs may also be con-
trolled. The external processor may
also overwrite some of the bq2050
power gauge data registers.
LCOM
LED common output
SEG1/PROG1
LED segment 1/
program 1 input
SEG2/PROG2
LED segment 2/
program 2 input
SEG3/PROG3
LED segment 3/
program 3 input
SEG4/PROG4
LED segment 4/
program 4 input
SEG5/PROG5
LED segment 5/
program 5 input
PROG6
Program 6 input
1
PN205001.eps
16-Pin Narrow SOIC
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
VCC
REF
N/C
DQ
RBI
SB
DISP
SR
LCOM
SEG1/PROG1
SEG2/PROG2
SEG3/PROG3
SEG4/PROG4
SEG5/PROG5
PROG6
VSS
REF
Voltage reference output
N/C
No connect
DQ
Serial communications
input/output
RBI
Register backup input
SB
Battery sense input
DISP
Display control input
SR
Sense resistor input
VCC
3.0–6.5V
VSS
System ground
Pin Connections
Pin Names
bq2050
9/96 C
Lithium Ion Power Gauge™ IC


Html Pages

1  2  3  4  5  6  7  8  9  10  11  12  13  14  15  16  17  18  19  20  21 


Datasheet Download




Link URL




Privacy Policy
ALLDATASHEET.COM
Does ALLDATASHEET help your business so far?  [ DONATE ]  

About Alldatasheet   |   Advertisement   |   Datasheet Upload   |   Contact us   |   Privacy Policy   |   Alldatasheet API   |   Link Exchange   |   Manufacturer List
All Rights Reserved© Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn