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參數(shù)資料
| 型號(hào)： | AAT2556 |
| 廠商： | Advanced Analog Technology,lnc. |
| 英文描述： | Battery Charger and Step-Down Converter for Portable Applications |
| 中文描述： | 電池充電器和降壓轉(zhuǎn)換器為便攜式應(yīng)用 |
| 文件頁數(shù)： | 14/29頁 |
| 文件大?。?/td> | 708K |
| 代理商： | AAT2556 |
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AAT2556
Battery Charger and Step-Down
Converter for Portable Applications
14
2556.2006.09.1.2
Pre-conditioning continues until the battery voltage
reaches V
MIN
. At this point, the charger begins con-
stant-current charging. The current level for this
mode is programmed using a single resistor from
the ISET pin to ground. Programmed current can
be set from a minimum 15mA up to a maximum of
500mA. Constant current charging will continue
until the battery voltage reaches the voltage regu-
lation point, V
BAT
. When the battery voltage reach-
es V
BAT
, the battery charger begins constant volt-
age mode. The regulation voltage is factory pro-
grammed to a nominal 4.2V (±0.5%) and will con-
tinue charging until the charging current has
reduced to 10% of the programmed current.
After the charge cycle is complete, the pass device
turns off and the device automatically goes into a
power-saving sleep mode. During this time, the
series pass device will block current in both direc-
tions, preventing the battery from discharging
through the IC.
The battery charger will remain in sleep mode,
even if the charger source is disconnected, until
one of the following events occurs: the battery ter-
minal voltage drops below the V
RCH
threshold; the
charger EN pin is recycled; or the charging source
is reconnected. In all cases, the charger will mon-
itor all parameters and resume charging in the
most appropriate mode.
Figure 1: Current vs. Voltage Profile During Charging Phases.
Constant Current
Charge Phase
Constant Voltage
Charge Phase
Preconditioning
Trickle Charge
Phase
Charge Complete Voltage
Constant Current Mode
Voltage Threshold
Regulated Current
Trickle Charge and
Termination Threshold
I = CC / 10
I = Max CC
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AAT2556IWP-CA-T1 | 制造商:AAT 制造商全稱:AAT 功能描述:Battery Charger and Step-Down Converter for Portable Applications |
| AAT2557 | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:500mA Battery Charger and 300mA LDO Regulator for Portable Systems |
| AAT2557ITO-CT-T1 | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:500mA Battery Charger and 300mA LDO Regulator for Portable Systems |
| AAT2557ITO-CW-T1 | 功能描述:電池管理 500 mA Battery Chrg 300 mA LDO Reg 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 |
| AAT2601 | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:Total Power Solution for Portable Applications |
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