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參數(shù)資料
| 型號(hào)： | BQ20Z80DBT-V101 |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類(lèi)： | 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)： | 57/73頁(yè) |
| 文件大?。?/td> | 1094K |
| 代理商： | BQ20Z80DBT-V101 |
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bq20z80 Normal
Charging Mode
(CHG FET = ON)
No
Yes
No
Yes
Turn CHG FET on
Reset t
Timer
and Start t
Timer
TERM
MAX
Turn CHG FET off,
Reset t
Timer
CHG_ON
Has I
Been Reached?
(Normal charge
termination)
TERM
No
Yes
Set Terminate Charge
Alarm
Has tMAX
expired?
Is VCELLMAX
MAX
> V
?
Is VCELLMAX
CHG_OFF
> V
?
Is VCELLMAX
CHG_ON
< V
?
No
Yes
No
Yes
No
Has tCHG_ON
expired?
Has tCHG_OFF
expired?
Reset and Start
tCHG_ON Timer
Hold
t
Timer
CHG_OFF
Reset
t
Timer
CHG_OFF
Cell Balancing
bq20z80-V101
SLUS625D – SEPTEMBER 2004 – REVISED OCTOBER 2005
Figure 3. Pulse Charging
The pulse-charging loop is exited and SBS.ChargingStatus( ) [PULSE] is cleared if another charging mode is
entered, a protection condition detected, or the battery is removed when DF:Operation Cfg B [NR] is cleared.
SIZE
DEFAULT
NAME
CLASS / SUBCLASS
FORMAT
VALID RANGE
UNITS
(BYTES)
VALUE
Turn ON Voltage
0 to 5000
4150
2
mV
Turn OFF Voltage
0 to 5000
4250
Charge Control /
Max ON Pulse Time
Integer
0 to 240
240
Pulse Charge Config (35)
1
s/4
Max OFF Pulse Time
0 to 240
0
Max OFF Voltage
0 to 5000
2
mV
4270
The bq20z80 uses the unique ability of Impedance Track technology to determine the chemical state of charge
of each cell. The cell balancing algorithm used in the bq20z80 causes the differences in the cells state of charge
in the fully charged state to gradually decrease, which prevents high cells from overcharge causing their
excessive degradation, and increases overall pack energy by preventing too early charge termination. This is
achieved by calculating the differences in the required amount of charge for each cell from its present state until
the cell is fully charged. For cells that require less charge to reach full, the difference in charge from those cell
requiring more charge to reach full (dQ) is by-passed during charging by turning ON bypass FETs in bq29312A
AFE for a predefined time. When any bypass FET is turned on, then SBS.ChargingStatus( ) [CB] is set;
otherwise, SBS.ChargingStatus( ) [CB] is cleared.
Note: If DF:Min Cell Deviation is 0, then no bypass FETs are turned ON and cell balancing is disabled.
The bypass time needed for each cell is calculated as
Bypass time = dQ x R / (V x duty_cycle).
Where, R is the value of the bypass resistance that can be calculated by adding the internal bypass FET resistor
value of 500
(typ) to the two series input filter resistors (Rχ) of bq29312A and corresponding cells. For
example: an input filter R
χ value of 100 , R = 500 +100 x 2 = 700 .
The value of resistances used is accounted for in DF:Min Cell Deviation with units on s/mAh and is calculated by:
60
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| 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(lèi)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(lèi)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(lèi)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(lèi)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(lèi)型:Battery Management 工具用于評(píng)估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
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