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參數(shù)資料
| 型號(hào)： | bq2014H |
| 廠商： | Benchmark Technology Group |
| 英文描述： | Low-Cost NiCd/NiMH Gas Gauge IC(低價(jià)格NiCd/NiMHGas Gauge芯片) |
| 中文描述： | 低成本鎳鎘/鎳氫電池電量監(jiān)測(cè)計(jì)芯片（低價(jià)格鎳鎘/ NiMHGas計(jì)芯片） |
| 文件頁數(shù)： | 8/22頁 |
| 文件大?。?/td> | 185K |
| 代理商： | BQ2014H |
Count Compensations
Charge Compensation
Two charge efficiency compensation factors are used for
trickle and fast charge. Trickle charge is defined as a rate
of charge < C/3. The compensation defaults to the fast-
charge factor until the actual charge rate is determined.
Temperature adapts the charge rate compensation fac-
tors over two ranges between nominal and hot tempera-
tures.The compensation factors are shown below.
Charge
Temperature
Trickle-Charge
Compensation
Fast-Charge
Compensation
< 40°C
0.81
0.94
> 40
°
C
0.75
0.88
Compensated Available Capacity
NAC is adjusted for rate of discharge and temperature
to derive the CACD and CACT values.
Corrections for the rate of discharge are made by adjust-
ing an internal discharge compensation factor. The dis-
charge factor is based on the discharge rate. This com-
pensation is applied to NAC to derive the value in the
CACD register.
The compensation factors during discharge are:
Approximate
Discharge Rate
Rate Efficiency
Factor
< 2C
100%
> 2C
95%
Temperature compensation during discharge also takes
place. At lower temperatures, the compensation factor
increases by 0.05 for each 10
°
C temperature range below
10
°
C. This compensation is applied to CACD to derive
the value in the CACT register. The temperature com-
pensation factor follows the equation
Temperature Efficiency Factor = 1.00 - (0.05
N)
where N = number of 10
°
C steps below 10
°
C.
For example,
T > 10°C:Nominal compensation,N = 0
0°C < T < 10°C:N = 1 (temperature efficiency = 95%)
-10°C < T < 0°C:N = 2 (temperature efficiency = 90%)
-20°C < T < -10°C:N = 3 (temperature efficiency = 85%)
-20°C < T < -30°C:N = 4 (temperature efficiency = 80%)
Self-Discharge Compensation
The self-discharge compensation is programmed for a
nominal rate of
1
64
*NAC per day,
147
NAC per day, or
disabled.
This is the rate for a battery within the
20
°
C–30°C temperature range (TMPGG = 6x). This rate
varies across 8 ranges from <10°C to >70°C, doubling
with each higher temperature step (10°C). See Table 3.
Digital Magnitude Filter
The bq2014H has a digital filter to eliminate charge and
discharge counting below a set threshold. The threshold
for both V
SRD
and V
SRQ
is 250
μ
V
.
8
Temperature
Step
Typical Rate
PROG
5
= Z
PROG
5
= L
< 10°C
10–20°C
20–30°C
30–40°C
40–50°C
50–60°C
60–70°C
> 70°C
NAC256
NAC188
NAC128
NAC94
NAC64
NAC47
NAC32
NAC23 5
NAC16
NAC11 8
NAC8
NAC5 88
.
NAC4
NAC2 94
.
NAC2
NAC1 47
.
Table 3. Self-Discharge Compensation
bq2014H
Preliminary
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| BQ2014HEVM-001 | 功能描述:電源管理IC開發(fā)工具 BQ2014H Eval Kit for NiMH 10.8V RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評(píng)估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
| BQ2014HSN | 功能描述:電池管理 NiCd/NiMH Gas Gauge RoHS:否 制造商:Texas Instruments 電池類型:Li-Ion 輸出電壓:5 V 輸出電流:4.5 A 工作電源電壓:3.9 V to 17 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:VQFN-24 封裝:Reel |
| BQ2014HSN-A309 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:Low-Cost NiCd/NiMH Gas Gauge IC |
| BQ2014HSNG4 | 功能描述:電池管理 NiCd/NiMH Gas Gauge RoHS:否 制造商:Texas Instruments 電池類型:Li-Ion 輸出電壓:5 V 輸出電流:4.5 A 工作電源電壓:3.9 V to 17 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:VQFN-24 封裝:Reel |
| BQ2014HSNTR | 功能描述:電池管理 NiCd/NiMH Gas Gauge RoHS:否 制造商:Texas Instruments 電池類型:Li-Ion 輸出電壓:5 V 輸出電流:4.5 A 工作電源電壓:3.9 V to 17 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:VQFN-24 封裝:Reel |
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