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參數(shù)資料
| 型號(hào)： | 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(yè)數(shù)： | 13/16頁(yè) |
| 文件大?。?/td> | 227K |
| 代理商： | BQ24901 |
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SLUS527
–
DECEMBER 2002
13
www.ti.com
APPLICATION INFORMATION
Table 1. State Machine Status
STATE MACHINE
STATUS
BATTERY PACK
STATUS
ACTION
1
Following power-on
reset (POR)
New pack insertion.
The device remains in the battery presence detection loop until a new battery is
detected.
Depending on the battery voltage, the device either enters pre
–
charge or fast
charge.
2
Following POR
New deeply-discharged
battery (with an open
protector inserted).
The device remains in the battery presence detection loop until a new battery is
detected.
Depending on the battery voltage, the device either enters pre
–
charge or fast
charge.
3
Pre-conditioning
Pack is removed.
The device enters fast charge (since the output capacitor rises above VLOWV) and
terminates immediately due to ITERM detection.
The device then enables IDISCHG for tDISCHG2. In the absence of a battery, the
BAT voltage falls below VRCH, prompting the device to indicate BATTERY
ABSENT. If the battery is present the BAT voltage does not fall below VRCH and
therefore device assumes a battery is still connected and indicates DONE on
STAT pins.
4
Fastcharge
(current or voltage
regulation)
Pack is removed.
The device terminates immediately due to ITERM detection.
The device then enables IDISCHG for tDISCHG2. In the absence of a battery, the
BAT voltage falls below VRCH, prompting the device to indicate BATTERY
ABSENT. If the battery is present the BAT voltage does not fall below VRCH and
therefore device assumes a battery is still connected and indicates DONE on
STAT pins.
5
Charge suspend
Pack is removed.
The device remains the charge suspend mode as long as the TS pin voltage is
outside the VLTF to VHTF range.
The device leaves the charge-suspend mode and resumes charging depending
on the battery voltage.
The device resets the timers only if it enters a charge mode different from where
the initial charge suspend condition happened (for instance from pre-charge to
fast or vice versa)
6
Charge suspend
Pack is removed. A new
pack with normal tempera-
ture inserted.
7
Charge suspend
Pack is removed. A new
pack with abnormal
temperature inserted.
The device remains the charge suspend mode as long as the TS pin voltage is
outside the VLTF to VHTF range.
Once temperature returns to normal, item 6 in this table applies.
8
Charge suspend
Pack is removed. A pack
with open protector and nor-
mal temperature inserted
The device leaves the charge suspend mode.
The device enters pre-charge (since the voltage is below VLOWV). This action
closes the protector and charging resumes.
9
Charge suspend
Pack is removed. A pack with
open protector and abnormal
temperature inserted
The device remains the charge suspend mode as long as the TS pin voltage is
outside the VLTF to VHTF range.
Once temperature returns to normal, item 8 in this table applies.
10
Timer fault
Pack remains in charger.
The device remains in the fault condition until POR or battery removal is detected.
11
Timer fault
Pack is removed.
Once in the fault mode, the device applies the IDETECT current to the output. The
purpose of this current is to detect the removal of the pack.
If voltage regulation can be maintained with IDETECT current, the device assumes
the pack has been removed (and only output capacitor is present).
The device then awaits battery insertion as outlined item 1 of this table.
12
Timer fault
Pack is removed. A new
pack is inserted.
See item 11 in this table.
13
Timer fault
Pack is removed. A new
pack with open protector is
inserted.
See items 11 and 12 in this table.
14
Timer fault
Pack remains in charger.
The bq24901 in the Done state as long as the pack voltage is above the VRCH
threshold. While in the done state there is no current flow to the battery (zero
current)
While in the DONE state, the device monitors the BAT voltage and initiates a new
cycle once the BAT voltage falls below VRCH threshold (this happens as the output
capacitor discharges through the input leakage on the BAT pin).
15
Done
Pack is removed.
While in the DONE state, the device monitors the BAT voltage and initiates a new
cycle once the BAT voltage falls below VRCH threshold (this happen as the output
capacitor discharges through the input leakage on the BAT pin).
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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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