BQ2145B- [TI]
Smart Battery Module with LEDs; 带LED的智能电池模块
| 型号： | BQ2145B- |
| 厂家： | 
TEXAS INSTRUMENTS |
| 描述： | Smart Battery Module with LEDs |
| 文件： | 总7页 (文件大小：835K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Preliminary bq2145
Smart Battery Module with LEDs
Features
ä
Complete smart battery solution for NiCd, NiMH,
and Li-Ion battery packs
ä
ä
Based on the bq2945 Gas Gauge IC
Accurate measurement of available battery
capacity
ä
Designed for battery pack integration:
–
–
Measures only 2.5 (L) x 0.7 (W) inches
Includes Gas Gauge IC, configuration
EEPROM, and sense resistor
–
–
Five onboard state-of-charge LEDs with
push-button activation
Low operating current for minimal battery
drain
A module development kit is also available for the
bq2145. The bq2145B-KT or the bq2145LB-KT includes
one configured module and the following:
ä
Critical battery information available over two-wire
serial port
1) An EV2200-45 interface board that allows connec-
tion to the serial port of any AT-compatible com-
puter.
General Description
2) Menu-driven software to display charge/discharge
activity and to allow user interface to the Gas
Gauge IC and serial E2PROM from any standard
Windows 95 or 3.1x PC.
The bq2145 Smart Battery Module provides a complete
solution for the design of intelligent battery packs. The
bq2145 uses the SMBus protocol and supports Smart
Battery Data commands in the SMB/SBD specifications.
Designed for battery pack integration, the bq2145 com-
bines the bq2945 Gas Gauge IC with a serial EEPROM
on a small printed circuit board. The board includes all
the necessary components to accurately monitor battery
capacity and communicate critical battery parameters to
the host system or battery charger. The bq2145 also in-
cludes five LEDs. The push-button switch activates the
LEDs to show remaining battery capacity in 20% incre-
ments.
Pin Descriptions
BAT+/Battery positive/Pack positive
PACK-/Pack negative
SMBC/Communications clock
SMBD/Serial data
B+
P-
C
D
Contacts are provided on the bq2145 for direct connec-
tion to the battery stack (B+, B-) and the two-wire inter-
face (C, D). Please refer to the bq2945 data sheet for
specific information on the operation of the Gas Gauge
and communication interface.
BAT-/Battery negative
Control pin 2
B-
CP2
CP1
Control pin 1
Unitrode configures the bq2145 based on the informa-
tion requested in Table 1. The configuration defines the
pack voltage, capacity, and chemistry and charge control
parameters. The Smart Battery Module uses the on-
board sense resistor to track charge and discharge activ-
ity of the battery pack. Figure 1 shows how the module
connects to the cells.
5/99
1
bq2145 Preliminary
Battery Pack
Cells
B-
P-
bq2145
B+
PACK-
PACK+
Load
Charger
FG2145-1.eps
Figure 1. Module Connection Diagram
2
Preliminary bq2145
Table 1. bq2145 Module Configuration
Customer Name: ______________________________________________________________________________________________
Contact: _______________________________________________________ Phone:____________________________
Address:________________________________________________________________________________________________
Sales Contact: __________________________________________________
Phone: ____________________________
Board Configuration
LEDs and switch
________________ Yes or No
Display mode
________________ Relative or Absolute
Discharge rate (3.0A max.)
Duration at max. discharge
Number of series cells
Min ____________
________________
________________
Avg ____________
Max ___________
EEPROM Configuration
Typical Values
NiMH
10 min
C/10
Li-Ion
10 min
C/10
Remaining time alarm (min) _______________ Sets the low time alarm level
Remaining capacity alarm
(mAh)
_______________ Sets the low capacity alarm level
Charging voltage (mV)
Design cpaacity (mAh)
Design voltage (mV)
Manufacturer date
Serial number
_______________ Sets the requested charging voltage
_______________ Defines the battery pack capacity
_______________ Defines the battery pack voltage
_______________ Battery pack manufacturer date
_______________ Battery pack serial number
65535
3000
12000
mm/dd/yy mm/dd/yy
0-65535
1C
4.1V/cell
3600
10800
0-65535
1C
Fast-charging current (mA) _______________ Sets the requested charging current
Maintenance charging
current (mA)
Li-Ion taper current (mA)
Sets the requested maintenance charging
_______________ current
_______________ Sets the upper limit for charge termination
C/20
NA
0
C/10
Maximum overcharge (mAh) _______________ Sets the maximum amount of overcharge
256mAh 128mAh
61°C 61°C
3°C/3min 4.6°C/20s
_______________ Sets the maximum charge temperature
_______________ Sets the termination rate
Maximum temperature (°C)
∆T/∆t (°C/min)
Fast-charge efficiency (%)
Maintenance charge effi-
ciency (%)
_______________ Sets the fast-charge efficiency factor
_______________ Sets the maintence charge efficiency factor
95%
80%
100%
100%
Self-discharge rate (%/day)
EDV1 (mV)
EDVF (mV)
_______________ Sets the batterys self-discharge rate
_______________ Sets the initial end-of-discharge warning
_______________ Sets the final end-of-discharge warning
1.5%/day 0.2%/day
1.05V/cell 3.0V/cell
1.0V/cell 2.8V/cell
_______________
180s
320s
Hold-off timer for ∆T/∆t (sec.)
Sets the hold off period for ∆T/∆t
termination
Manufacturer name
_______________ Programs manufacturer’s name (11 char.
max)
bq
bq
Device name
Chemistry
Manufacturer data
FAE Approval
_______________ Programs device name (7 char. max)
_______________ Programs pack’s chemistry (7 char. max)
_______________ Open field (5 char. max)
bq36
NiMH
2040
bq202
LION
2040
____________________________________
Date: ____________
3
bq2145 Preliminary
bq2145 Schematic
D8
1
SEE CHART 1 FOR RESISTOR VALUES.
OPTIONAL 6.2V
BAV99
1
VCC
TP6
Q1
BAT+
1
2
R18
1
2N7002
B+
1
1
2
3
TP5
D10
3
100
BAW56
VCC
2
D9
R11
1
1
2
2
BZX84C6V2
C2
1
2
1
1%
1
1
2
1
1
1
0.1UF
R5
R13 R12
U2
1%
10K
10K
U1
1
2
3
4
8
7
6
C4
A0
VCC
WP
2
2
1
16
A1
VCC VOUT
SEG1 REF
SEG2 SMBC
SEG3 SMBD
SEG4 CP2
SEG5 SB
1
2
3
4
5
6
7
8
15
14
13
12
11
10
9
A2
VSS
SCL
SDA
5
TP4
1
OPTIONAL
24LC01
1
CP2
CP1
VCC
2
CPI
VSS
DISP
SR
1
1
1
2
bq2945
C1
R4
1
VCC
2
C5
0.1UF
1
2
1%
Q2
2
BSS84ZX
1
3
R17
100K
0.1UF
R8
R9
SMBC
1
2
1
2
1
C
100
100
SW1
D7
1
2
2
1
3
4
R16
330
D1
3
2
1
1
1
1
1
2
1
1
1
1
1
DISPLAY
COLOR
BAV99
D6
R3
330
D2
2
2
2
2
2
2
2
2
2
1
R6
1
2 3
1
COLOR
100
BAV99
R14
330
D3
CHART 1
# OF CELLS R5
R11
R4
R7
SMBD
COLOR
1
2
1
D
2
3
4
301K 86.5K 100K
499K 909K 100K
698K 909K 100K
R2
330
D4
100
R10
TP3
1
BAT-
1
2
1
B-
100K
COLOR
1
2
1
R15
330
D5
6
8
9
10
12
499K 162K 100K
698K 402K 100K
806K 604K 100K
909K 909K 100K
909K 1M 86.5K
C3
R1
0.05
3W
0.1UF
COLOR
2
PACK-
1
P-
4
Preliminary bq2145
bq2145 Board
5
bq2145 Preliminary
Ordering Information
bq2145
B – XXX
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:
Smart Battery Module with LEDs
Notes:
1. Requires configuration sheet (see Table 1)
2. Example production part number: bq2145LB-001
6
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