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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)： | 12/29頁 |
| 文件大?。?/td> | 708K |
| 代理商： | AAT2556 |
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AAT2556
Battery Charger and Step-Down
Converter for Portable Applications
12
2556.2006.09.1.2
Functional Description
The AAT2556 is a high performance power system
comprised of a 500mA lithium-ion/polymer battery
charger and a 250mA step-down converter.
The battery charger is designed for single-cell
lithium-ion/polymer batteries using a constant cur-
rent and constant voltage algorithm. The battery
charger operates from the adapter/USB input volt-
age range from 4V to 6.5V. The adapter/USB
charging current level can be programmed up to
500mA for rapid charging applications. A status
monitor output pin is provided to indicate the bat-
tery charge state by directly driving one external
LED. Internal device temperature and charging
state are fully monitored for fault conditions. In the
event of an over-voltage or over-temperature fail-
ure, the device will automatically shut down, pro-
tecting the charging device, control system, and
the battery under charge. Other features include
an integrated reverse blocking diode and sense
resistor.
The step-down converter operates with an input volt-
age of 2.7V to 5.5V. The switching frequency is
1.5MHz, minimizing the size of the inductor. Under
light load conditions, the device enters power-saving
mode; the switching frequency is reduced, and the
converter consumes 30μAof current, making it ideal
for battery-operated applications. The output volt-
age is programmable from V
IN
to as low as 0.6V.
Functional Block Diagram
Charge
Control
Reverse Blocking
Constant
Current
BAT
UVLO
Over-
Temperature
Protection
STAT
GND
+
-
+
-
ISET
ADP
EN_BAT
VIN
LX
Logic
DH
DL
+
-
V
REF
V
REF
FB
Input
EN_BUCK
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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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