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參數(shù)資料
| 型號： | BQ24901 |
| 英文描述： | Fast Recovery Bridge Rectifiers |
| 中文描述： | 單細(xì)胞Li-Ion/Li-Pol脫機(jī)應(yīng)用充電器（小方控制）采用TSSOP - 14 |
| 文件頁數(shù)： | 1/16頁 |
| 文件大?。?/td> | 227K |
| 代理商： | BQ24901 |
SLUS527 – DECEMBER 2002
1
www.ti.com
FEATURES
Designed for Off-Line Charger Design for
Single-Cell Li-Ion Packs
Provides Control Feedback to a Primary-Side
Controller
Robust Battery Insertion and Removal
Detection
Charge Current and Voltage Regulation
Feedback to Primary-Side for High-Accuracy
Charging
Charge Termination by Minimum Current and
Time
Pre-Charge Conditioning Regulator with
Safety Timer
Charge Status Outputs for LED or Host
Processor Interface Indicates Charge-
in-Progress, Charge Completion, and Fault
Conditions
Temperature Monitoring Before and During
Charge
Short-Circuit Protection
Small, 14-Pin TSSOP Package
APPLICATIONS
Cradle Chargers for Digital Cameras
Desktop Chargers
Handheld Devices
DESCRIPTION
The bq24901 Li-Ion charge management devices
are designed specifically for off-line charger
applications. The bq24901 resides on the
secondary-side of the transformer and provides
the control feedback to a variety of primary side
controllers. The bq24901 offers current or voltage
regulation feedback, temperature monitoring,
charge status, and adjustable charge termination,
in
a
single
monolithic
battery-absent or charge-complete conditions,
the
bq24901
continuously
secondary-side voltage, used as V
CC
supply to
the device.
device.
During
regulates
the
The bq24901 features a time-limited precon–
ditioning phase to condition deeply discharged
cells. The pre-conditioning phase is achieved by
linear regulation in the secondary side. Following
preconditioning, the bq24901 regulates the
charge current to the value set by the external
current sense resistor. Once the battery reaches
the charge voltage, the voltage regulation loop
takes over and completes the charge cycle. The
accuracy of the voltage regulation is better than
±
30mV. Charge is terminated based on minimum
current. The minimum current level is set through
TADJ pin. An internal five-hour charge timer
provides a backup for charge termination.
The bq24901 is designed to reliably detect battery
insertion and removal conditions, including packs
with open protectors. Other standard features
include a recharge feature activated when the
battery voltage falls below the V
RCH
threshold.
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Copyright
2002, Texas Instruments Incorporated
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| BQ24901PW | 功能描述:電池管理 1Cell Li-Ion Charger 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 |
| BQ24901PWG4 | 功能描述:電池管理 1Cell Li-Ion Charger 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 |
| BQ24901PWR | 功能描述:電池管理 1Cell Li-Ion Charger 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 |
| BQ24901PWRG4 | 功能描述:電池管理 1Cell Li-Ion Charger 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 |
| BQ25 | 制造商:Newport Electronics Inc 功能描述:DIGITAL PANEL PROCESS METER; Leaded Process Compatible:No; Peak Reflow Compatible (260 C):No ;RoHS Compliant: No |
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