參數(shù)資料
型號(hào)： BQ20Z80DBT-V101
廠商： TEXAS INSTRUMENTS INC
元件分類： 電源管理
英文描述： 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDSO38
封裝： GREEN, PLASTIC, TSSOP-38
文件頁(yè)數(shù)： 73/73頁(yè)
文件大小： 1094K
代理商： BQ20Z80DBT-V101
www.ti.com
Gas Gauging
Impedance Track Load Model
Impedance Track Load Compensation
bq20z80-V101
SLUS625D – SEPTEMBER 2004 – REVISED OCTOBER 2005
The bq20z80 measures individual cell voltages, pack voltage, temperature, and current using features of the
bq29312A AFE device. The bq20z80 determines battery state of charge by analyzing individual cell voltages
when a time exceeding 35 minutes has passed since the batteries last charge or discharge activity. The bq20z80
measures charge and discharge activity by monitoring the voltage across a small-value series sense resistor (5
m
to 20 m typ.) between the cell stack negative terminal and the negative terminal of the battery pack. The
batteries State of charge is subsequently adjusted during load or charger application using the integrated charge
passed through the battery.
Resistance update takes place in discharge mode, while OCV and Qmax updates take place only in relaxation
mode. Entry and exit of each mode is controlled by ata flash (DF:) parameters in the subclass 'Gas Gauging:
Current Thresholds' section. Charge mode is exited and Relaxation mode is entered when SBS.Current( ) goes
below DF:Quit Current for a period of DF:Chg Relax Time. Discharge mode is entered when SBS.Current( ) goes
below DF:Dsg Current Threshold. Discharge mode is exited and Relaxation mode is entered when SBS.Current(
) goes above (–) DF:Quit Current threshold for a period of DF:Dsg Relax Time. Charge mode is entered when
SBS.Current( ) goes above DF:Chg Current Threshold.
The total battery capacity is found by comparing states of charge before and after applying the load with the
amount of charge passed. When an applications load is applied, the impedance of each cell is measured by
comparing the open circuit voltage (OCV) obtained from a predefined function for present state of charge with the
measured voltage under load.
Measurements of OCV and charge integration determine chemical state of charge and Chemical Capacity
(Qmax). The initial DF:Qmax Pack, DF:Qmax Cell 1, DF:Qmax Cell 2, DF:Qmax Cell 3, and DF:Qmax Cell 4
values are taken from the cell manufacturers' data sheet multiplied by the number of parallel cells, and are also
used for the SBS.DesignCapacity( ) value in DF:Design Capacity. The bq20z80 acquires and updates the
battery-impedance profile during normal battery usage. It uses this profile, along with state-of-charge and the
Qmax values, to determine SBS.FullChargeCapacity( ) and SBS.RelativeStateOfCharge( ) specifically for the
present load and temperature. SBS.FullChargeCapacity( ) is reported as capacity or energy available from a fully
charged battery under the present load and temperature until SBS.Voltage( ) reaches the DF:Term Voltage.
NAME
CLASS / SUBCLASS
FORMAT
VALID RANGE
SIZE (BYTES)
UNITS
DEFAULT VALUE
Term Voltage
Gas Gauging / IT Config (80)
Signed Int
-32768 to 32767
2
mV
12000
Quit Current
0 to 1000
2
mA
10
Dsg Relax Time
0 to 255
1
s
1
Gas Gauging /
Chg Relax Time
0 to 255
1
s
60
Current Thresholds (81)
Chg Current Threshold
0 to 2000
2
mA
50
Dsg Current Threshold
0 to 2000
2
mA
100
QMax Pack
Integer
0 to 65535
2
mAh
4400
Qmax Cell 1
0 to 65535
2
mAh
4400
Qmax Cell 2
Gas Gauging / State (82)
0 to 65535
2
mAh
4400
Qmax Cell 3
0 to 65535
2
mAh
4400
Qmax Cell 4
0 to 65535
2
mAh
4400
Design Capacity
SBS Configuration / Data (48)
0 to 65535
2
mAh
4400
During normal operation, the battery-impedance profile compensation of the Impedance Track algorithm can
provide more accurate full-charge and remaining state-of-charge information if the typical load type is known.
The two selectable options are constant current and constant power.
DF:Load Mode VALUE
COMPENSATION
0x00
Constant current
0x01
Constant power
In order to compensate for the I x R drop near the end of discharge, the bq20z80 needs to be configured for
whatever current (or power) will flow in the future. While it can not be exactly known, the bq20z80 can use load
history such as the averaged current of the present discharge to make a sufficiently accurate prediction. The
9
相關(guān)PDF資料
PDF描述
BQ2110LB-001 DC-DC REG PWR SUPPLY MODULE
BQ24630RGET SWITCHED CAPACITOR CONVERTER, PQCC24
BQ25070DQCR 1 A BATTERY CHARGE CONTROLLER, PDSO10
BQ3285ESSNTR 1 TIMER(S), REAL TIME CLOCK, PDSO24
BQ3285ESS-N 1 TIMER(S), REAL TIME CLOCK, PDSO24
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
BQ20Z80DBT-V101G4 功能描述:電池管理 1% acc Gas Gauge for LiIon batterie 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
BQ20Z80DBT-V102 功能描述:電池管理 SBS 1.1-Compliant 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
BQ20Z80DBT-V110 功能描述:電池管理 SBS 1.1-Compliant 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
BQ20Z80DBT-V110G4 功能描述:電池管理 SBS 1.1-Compliant 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
BQ20Z80EVM-001 功能描述:電源管理IC開(kāi)發(fā)工具 Impedance Track Fuel Gge LiIon Batt Packs 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
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*