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BQ2168LB-XXX

更新时间： 2024-09-15 22:24:55
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德州仪器 - TI 仪表
页数 文件大小 规格书
9页 849K
描述
Li-Ion Power Gauge⑩ Module with Pack Supervisor

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BQ2168LB-XXX 数据手册

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bq2168  
Li-Ion Power Gauge™ Module  
with Pack Supervisor  
Features  
➤
➤
➤
➤
Complete and compact lithium ion gas gauge and  
protection solution for three or four series cells  
Accurate measurement of available battery  
capacity  
Provides overvoltage, undervoltage, and  
overcurrent protection  
Designed for battery pack integration  
–
–
–
–
Small size  
Includes bq2050H and bq2058 ICs  
On-board charge and discharge control FETs  
Low operating current for minimal battery drain  
➤
➤
High side FET control  
or graphite anode), and the threshold limits. Figure 1  
shows how the module connects to the cells.  
Battery capacity available through single-wire  
serial port  
The bq2168L includes five LEDs to display remaining capac-  
ity in 20% increments of the learned capacity. The LEDs are  
activated with the onboard push-button switch.  
➤
“L” version includes 5 push-button activated LEDs  
to display state-of-charge information  
A module development kit is also available for the  
bq2168. The bq2168B-KT or the bq2168LB-KT includes  
one configured module and the following:  
General Description  
The bq2168 Power Gauge Module provides a complete and  
compact battery management solution for Li-Ion battery  
packs. Designed for battery pack integration, the bq2168  
combines the bq2050H Power Gauge IC with the bq2058  
Supervisor IC on a small printed circuit board. The board  
includes all the necessary components to accurately monitor  
battery capacity and protect the cells from overvoltage, un-  
dervoltage, and overcurrent conditions. The board works  
with three or four Li-Ion series cells.  
1) An EV2200-50H interface board that allows con-  
nection to the serial port of any AT-compatible com-  
puter.  
2) Menu driven software to display charge/discharge  
activity and to allow user interface to the bq2050H  
from any standard Windows 3.1x or 95 PC.  
Pin Descriptions  
The Power Gauge IC uses the on-board sense resistor to  
track charge and discharge activity of the battery pack.  
Critical battery information can be accessed through the  
serial communications port at HDQ. The supervisor cir-  
cuit consists of the bq2058 and two FETs. The bq2058  
controls the FETs to protect the batteries during  
charge/discharge cycles and short circuit conditions. The  
bq2168 provides contacts for the positive and negative  
terminals of each battery in the stack. Please refer to  
the bq2050H and bq2058 data sheets for the specifics on  
the operation of the power gauge and supervisor ICs.  
Pack positive  
POS  
BAT1P/Battery 1 positive input  
BAT1N/Battery 1 negative input  
BAT2N/Battery 2 negative input  
BAT3N/Battery 3 negative input  
BAT4N/Battery 4 negative input  
Overcurrent test input  
B1P  
B1N  
B2N  
B3N  
B4N  
ITEST  
HDQ  
NEG  
Unitrode configures the bq2168 based on the informa-  
tion requested in Table 1. The configuration defines the  
number of series cells, the nominal battery pack capac-  
ity, the self-discharge rate, the Li-Ion battery type (coke  
Serial communications port  
Pack negative  
5/99 B  
1
1234567...9

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