BQ2114LMODULE [TI]
IC DC-DC REG PWR SUPPLY MODULE, Power Supply Module;
| 型号： | BQ2114LMODULE |
| 厂家： | 
TEXAS INSTRUMENTS |
| 描述： | IC DC-DC REG PWR SUPPLY MODULE, Power Supply Module 电池 仪表 |
| 文件： | 总7页 (文件大小：661K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
bq2114
NiCd or NiMH Gas Gauge Module
with Charge-Control Output
Features
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Complete bq2014 Gas Gauge solution for NiCd or
NiMH battery packs
Charge-control output allows communication to
external charge controller (bq2004)
Battery information available over a single-wire
bidirectional serial port
Battery state-of-charge monitoring for 4- to 12-cell
series applications
On-board regulator allows direct connection to the
battery
“L” version includes push-button activated LEDs to
display state-of-charge information
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Nominal capacity and cell chemistry pre-configured
Compact size for battery pack integration
A module development kit is also available for the
bq2114. The bq2114B-KT or bq2114LB-KT includes one
configured module and the following:
1) An interface board that allows connection to the se-
rial port of an AT-compatible computer.
General Description
2) Menu-driven software with the bq2114 to display
charge/discharge activity and to allow user inter-
face to the bq2014 from any standard DOS PC.
The bq2114 Gas Gauge Module provides a complete and
compact solution for capacity monitoring of NiCd and
NiMH battery packs. Designed for battery pack integra-
tion, the bq2114 incorporates a bq2014 Gas Gauge IC, a
current sense resistor, and all other components neces-
sary to accurately monitor and display the capacity of 4
to 12 series cells. The bq2114L includes five surface-
mounted LEDs to display remaining capacity in 20% in-
crements of the learned capacity (relative mode). The
LEDs are activated with the onboard push-button
switch.
3) Source code for the TSR.
Pin Descriptions
DQ/Serial communication port
BAT+/Battery positive/pack positive
CHG/Charge control output
EMPTY/Empty indicator output
GND/Ground
P1
P2
P3
P4
P5
P6
P7
Contacts are provided on the bq2114 for direct connec-
tion to the battery stack (BAT+, BAT-), the serial com-
munications port (DQ), the empty indicator (EMPTY),
and the charge control output (CHG). Please refer to the
bq2014 data sheet for the specifics on the operation of
the Gas Gauge.
PACK-/Pack negative
Unitrode configures the bq2114 based on the informa-
tion requested in Table 1. The configuration defines the
number of series cells, the nominal battery pack capac-
ity, and the self-discharge rate.
BAT-/Battery negative
5/99 B
1
bq2114
Battery Pack
Cells
P7
P6
bq2114
P2
PACK-
PACK+
Load
Charger
FG211401.eps
Figure 1. Module Connection Diagram
Table 1. bq2114 Module Configuration
Customer Name: ___________________________________________________________________________
Contact: _________________________________________ Phone: ______________________________
Address: _________________________________________________________________________________
_________________________________________________________________________________
Sales Contact: ____________________________________
Phone: ______________________________
Number of series battery cells (4–12)
Battery type (NiCd or NiMH)
Battery pack capacity (mAh)
Discharge rate into load (3.0A max.)
Charge rate (3.0A max.)
________________________________________
________________________________________
________________________________________
Min.
Avg.
Max.
________________________________________
________________________________________
LEDs and switch (Y/N)
FAE approval: _____________________________________
Date:________________________________
2
bq2114
bq2114 Schematic
Note:
Schematic shows components which may not be placed on the
board, depending upon the configuration.
3
bq2114
bq2114 Board
4
bq2114
Absolute Maximum Ratings
Symbol
Parameter
Relative to V
Minimum Maximum
Unit
Conditions
V
-0.3
+7.0
+7.0
3
V
V
bq2014
bq2014
CC
SS
All other pins
Relative to V
-0.3
SS
-
-
W
W
Thru-hole sense resistor
Continuous sense resis-
tor power dissipation
P
SR
1
Surface-mount sense resistor
Continuous charge/
discharge current
I
-
3.0
A
CHG
T
Operating temperature
Storage Temperature
0
+70
+85
°C
°C
Commercial
OPR
STR
T
-40
Note:
Permanent device damage may occur if Absolute Maximum Ratings are exceeded. Functional operation
should be limited to the Recommended DC Operating Conditions detailed in this data sheet. Exposure to con-
ditions beyond the operational limits for extended periods of time may affect device reliability.
DC Electrical Characteristics (T = T
)
OPR
A
Symbol
Parameter
Minimum
Typical
Maximum
Unit Conditions/Notes
Number of series cells in
battery pack
NumCell
4
-
12
-
BAT+
BAT-
Positive terminal of pack
Negative terminal of pack
GND
NumCell ∗ 1.2V NumCell ∗ 1.8V
V
V
GND - 0.3
-
GND+2.0
Supply current at BAT+
terminal (no external
loads)
µA
I
-
200
300
CC
1
R
I
Internal pull-down
500k
-
-
-
-
Ω
DQ
Open-drain sink current
DQ, EMPTY, CHG
1
5.0
mA
OL
Open-drain output low,
DQ, EMPTY, CHG
1
V
OL
I
OL
< 5mA
-
-
0.5
V
1
1
V
IHDQ
V
ILDQ
V
OS
DQ input high
DQ input low
Voltage offset
2.5
-
-
-
-
V
V
-
-
0.8
150
1
µV
Note:
1. Characterized on PCB, IC 100% tested.
5
bq2114
DC Voltage Thresholds (T = T
)
A
OPR
Symbol
Parameter
Minimum
Typical Maximum
Unit
Notes
1
1
1
V
Final empty warning
First empty warning
Maximum single-cell voltage
Sense resistor range
Valid charge
0.93
1.03
2.20
-300
375
-
0.95
0.97
1.07
2.30
+2000
-
V
V
BAT+/NumCell
BAT+/NumCell
EDVF
EDV1
MCV
SRO
V
V
V
V
V
1.05
2.25
V
BAT+/NumCell
2
-
-
-
mV
µV
µV
V
+ V
SR
OS
OS
OS
2, 3
2, 3
V
V
+ V
+ V
SRQ
SR
SR
Valid discharge
-300
SRD
Notes:
1. At SB input of bq2014.
2. At SR input of bq2014.
3. Default value; value set in DMF register.
Data Sheet Revision History
Change No.
Page No.
Description
1
1
2
5
Updated Table 1 to include 3.0A limit
Added 3.0A maximum continuous charge/discharge current specification
Note:
Change 1 = May 1999 B changes from Sept. 1996.
Ordering Information
bq2114
B –
Customer Code:
1
Blank = Sample or Pre-production
KT = Evaluation system
2
XXX = Customer-specific; assigned by Unitrode
Package Option:
B = Board-level product
LED Option:
L = LEDs plus switch
Blank = No LEDs or switch
Device:
NiCd or NiMH Gas Gauge Module with Charge-Control Output
Notes:
1. Requires configuration sheet (see Table 1)
2. Example production part number: bq2114LB-003
6
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