參數(shù)資料
型號： BQ2083
英文描述： Silicon Bridge Rectifiers
中文描述： 銀紫荊星章符合電量監(jiān)測計芯片的使用與BQ29311
文件頁數(shù)： 18/54頁
文件大?。?/td> 461K
代理商： BQ2083
SLUS573 JULY 2003
www.ti.com
18
Li-Ion Protector Control
The bq2083V1P2 provides protection for Li-Ion batteries, as shown in Table 10. The bq2083V1P2 uses the
bq29311 to measure and report individual series cell voltages. The bq2083V1P2 determines if a voltage protection
condition has been breached and turns off the respective control FET via I
2
C communication to the bq29311. It is
recommended that the bq2083V1P2 protection control be validated by two successive measurements by setting
VOD=1
in
Misc Configuration
.
The bq29311 can detect and protect the load from an overcurrent (OC) or short circuit (SC). The bq29311 alerts the
bq2083V1P2 with the XALERT output when ever an overcurrent or short circuit threshold is breached in either the
charge or discharge directions.
The bq2083V1P2 asserts CVOV and instructs the bq29311 to turn off the charge FET if an Overvoltage or
Overtemperature condition exists, or if AverageCurrent( )
≥
Fast-Charging Current
+
Over Current Margin
(Prolonged Overcurrent condition in Table 6). The bq2083V1P2 does not turn off the charge FET if there is a
discharge current > 50 mA. The bq2083V1P2 instructs the bq29311 to turn on the charge FET when Overvoltage
and Overtemperature conditions no longer exist, and AverageCurrent( ) < 256 mA (if Prolonged Overcurrent
generated the fault condition).
The bq2083V1P2 asserts CVUV and instructs the bq29311 to turn off the discharge FET if an Overdischarged
condition exists, or if AverageCurrent( )
≤
overload current (Overload). The bq2083V1P2 does not turn off the
discharge FET if there is a charge current
≥
50 mA. The bq2083V1P2 instructs the bq29311 to turn on the discharge
FET when the Overdischarged condition no longer exists and AverageCurrent( ) > 256 mA (if Overload generated
the fault condition).
Table 10. bq2083V1P2 to bq29311 Interface (FET Protection Control)
Battery State (Table 6)
DISCHARGING FET
Normal (see Note 1)
CHARGING FET
Off (see Note 2)
CVOV = 1: Prolonged Overcurrent, Overvoltage, Overtemperature
CVOV = CVUV = 0
Normal (see Note 1)
Normal (see Note 1)
CVUV = 1: Overload, Overdischarged
(1)State determined by bq29311
(2)On if there is a discharge current
≥
50 mA
(3)On if there is a charge current
≥
50 mA.
Off (see Note 3)
Normal (see Note 1)
Table 11. Stand-Alone bq29311 Protection Control
MODE
CONDITION
CLEAR (see Note 1)
AverageCurrent() = 0 mA
Over Load
AFE Over Curr Dsg
(DF 0xb2) is breached for
Over Curr Delay
(DF 0xb4)
Over Current
AFE
Over Curr Chg
(DF 0x0b3) is breached for
Over Curr Delay
(DF 0xb4)
AverageCurrent() = 0 mA
Short Circuit, Discharge
AFE Short Circ Thresh
(DF 0xb6) is breached for
AFE Short Circuit Delay
(DF
0xb7, lower nibble)
AverageCurrent() = 0 mA
Short Circuit, Charge
AFE Short Circ Thresh
(DF 0xb6) is breached for
AFE Short Circuit Delay
(DF
0xb7, upper nibble)
(1)Clear is detected and controlled by the bq2083V1P2.
AverageCurrent() = 0 mA
SAFE Output
The SAFE output of the bq2083V1P2 provides an additional level of safety control. The active low safety output
can blow a fuse or control another switch on the basis of temperature, pack-voltage cell-voltage, or an integrity check
of the AFE registers.
The SAFE output is driven low in any of the following 4 conditions and if the SAFE output activates, the bq2083V1P2
sets the SOV bit in pack status. SOV remains set until the bq2083V1P2 is reset. The SAFE output can be pulled
high (cleared) by a POR of the bq2083V1P2 only.
SAFE activation conditions:
When CVOV = 1 AND after a minimum of 1s Voltage() >
Safety Over Voltage
(DF 0x68 and 0x69), or
When CVOV = 1 AND after a minimum of 1s the Temperature() >
Safety Temperature
(DF 0x6a and 0x6b)
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BQ2083DBT 功能描述:電池管理 SBS-Cmplnt Gas Gauge for Use w/BQ29311 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
BQ2083DBTG4 功能描述:電池管理 SBS-Cmplnt Gas Gauge for Use w/BQ29311 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
BQ2083DBTR 功能描述:電池管理 SBS-Cmplnt Gas Gauge for Use w/BQ29311 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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