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參數資料
| 型號： | bq2014 |
| 廠商： | Benchmark Technology Group |
| 英文描述： | Gas Gauge IC with External Charge Control(氣體Gauge（帶外部電荷控制）) |
| 中文描述： | 氣體計IC（氣體壓力表與外部充電控制（帶外部電荷控制）） |
| 文件頁數： | 6/21頁 |
| 文件大?。?/td> | 219K |
| 代理商： | BQ2014 |
determined by multiplying the rated battery capac-
ity in mAh by the sense resistor value:
Battery capacity (mAh)*sense resistor (
) =
PFC (mVh)
Selecting a PFC slightly less than the rated capac-
ity for absolute mode provides capacity above the
full reference for much of the battery's life.
Example: Selecting a PFC Value
Given:
Sense resistor = 0.1
Number of cells = 6
Capacity = 2200mAh,NiCd battery
Current range = 50mA to 2A
Relative display mode
Serial port only
Self-discharge =
C64
Voltage drop over sense resistor = 5mV to 400mV
Therefore:
2200mAh
0.1
= 220mVh
Select:
PFC = 33792 counts or 211mVh
PROG
1
= float
PROG
2
= float
PROG
3
= float
PROG
4
= low
PROG
5
= float
DONE = low
6
bq2014
PROG
x
Programmed
Full
Count
(PFC)
PROG
4
= L
PROG
4
= Z
Units
1
2
PROG3 = H
Scale =
1/80
614
563
512
461
422
384
346
320
282
PROG3 = Z PROG3 = L PROG3 = H PROG3 = Z PROG3 = L
Scale =
1/160
1/320
1/640
307
154
76.8
282
141
70.4
256
128
64.0
230
115
57.6
211
106
53.0
192
96.0
48.0
173
86.4
43.2
160
80.0
40.0
141
70.4
35.2
-
-
-
Scale =
Scale =
Scale =
1/1280
38.4
35.2
32.0
28.8
26.4
24.0
21.6
20.0
17.6
Scale =
1/2560
19.2
17.6
16.0
14.4
13.2
12.0
10.8
10.0
8.8
mVh/
count
mVh
mVh
mVh
mVh
mVh
mVh
mVh
mVh
mVh
H
H
H
Z
Z
Z
L
L
L
VSR equivalent to 2
counts/s (nom.)
H
Z
L
H
Z
L
H
Z
L
49152
45056
40960
36864
33792
30720
27648
25600
22528
90
45
22.5
11.25
5.6
2.8
mV
Table 2. bq2014 Programmed Full Count mVh Selections
Pin Connection
PROG
5
Self-Discharge Rate
Disabled
DISP Display State
H
LED disabled
Z
NAC64
LED enabled on discharge when
V
SRO
< -4mV or during a valid charge
LED on
L
NAC47
Table 1. bq2014 Programming
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