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參數(shù)資料
| 型號： | AAT3697 |
| 廠商： | Advanced Analog Technology,lnc. |
| 英文描述： | 2A Lithium-Ion/Polymer Battery Charger |
| 中文描述： | 第2A鋰離子電池充電器 |
| 文件頁數(shù)： | 14/22頁 |
| 文件大?。?/td> | 1269K |
| 代理商： | AAT3697 |
AAT3697
2A Lithium-Ion/Polymer Battery Charger
14
3697.2007.02.1.1
R
T1
and R
T2
for use with
PTC
Thermistor
Eq. 3:
Where R
TC
is the thermistor's cold temperature
resistance and R
TH
is the thermistor's hot tempera-
ture resistance. See thermistor specifications for
information. To ensure there is no dependence on
the input supply changes, connect the divider
between V
ADP
and GND. Disabling the tempera-
ture-monitoring function is achieved by applying a
voltage between V
TS1
and V
TS2
on the TS pin.
Battery Charge Status Indication
The AAT3697 indicates the status of the battery
under charge with two different systems. First, the
device has two status LED driver outputs. These
two LEDs can indicate simple functions such as no
battery charge activity, battery charging, charge
complete, and charge fault. The AAT3697 also
provides a bi-directional data reporting function so
that a system microcontroller can interrogate the
DATA pin and read any one of 12 system states.
Status Indicator Display
Simple system charging status states can be dis-
played using one or two LEDs in conjunction with
the STAT1 and STAT2 pins on the AAT3697.
These two pins are simple open drain switches
used to connect the LED cathodes to ground. It is
not necessary to use both display LEDs if a user
simply wants to have a single lamp to show "charg-
ing" or "not charging."
This can be accomplished by using the STAT1 pin
and a single LED. Using two LEDs and both STAT
pins simply gives the user more information to the
charging states. Refer to Table 3 for LED display
definitions. The LED anodes should be connected
to V
ADP
.
The LEDs should be biased with as little current as
necessary to create reasonable illumination; there-
fore, a ballast resistor should be placed between
the LED cathodes and the STAT1/2 pins. LED cur-
rent consumption will add to the overall thermal
power budget for the device package, hence it is
good to keep the LED drive current to a minimum.
2mA should be sufficient to drive most low-cost
green or red LEDs. It is not recommended to
exceed 8mA for driving an individual status LED.
The required ballast resistor values can be esti-
mated using the following formulas:
Eq. 4:
Example:
Eq. 5:
Note: Red LED forward voltage (V
F
) is typically
2.0V @ 2mA
(5.5V
- 2.0
V)
2mA
R
B(STAT1)
=
= 1.75k
Ω
(V
ADP
-
V
F(LED)
)
I
LED(STAT1/2)
R
B(STAT1/2)
=
5
R
TH
R
TC
3
(R
TH
- R
TC
)
5
R
TH
R
TC
(2
R
TH
) - (7
R
TC
)
R
T1
=
R
T2
=
Table 3: LED Status Indicator.
Event Description
STAT1
STAT2
Charge Disabled or Low Supply
Charge Enabled Without Battery
Battery Charging
Charge Completed
Fault
Off
Off
Flash
1
On
Off
On
Flash
1
Off
On
On
1. Flashing rate depends on output capacitance.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AAT3697IWP-4.2-T1 | 制造商:Advanced Analogic Tech 功能描述:AAT3697 Series 5.5 V 2 A Lithium-Ion/Polymer Battery Charger - TDFN-12 制造商:SKYWORKS SOLUTIONS 功能描述:AAT3697 Series 5.5 V 2 A Lithium-Ion/Polymer Battery Charger - TDFN-12 制造商:Skyworks Solutions Inc 功能描述:POWER MANAGEMENT IC |
| AAT3698IWO-4.2-1-T1 | 功能描述:電池管理 1.6A Linear Li-Ion Battery 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 |
| AAT3698IWO-4.2-2-T1 | 功能描述:電池管理 1.6A Linear Li-Ion Battery 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 |
| AAT3783AIRN-4.2-DB1 | 制造商:SKYWORKS SOLUTIONS 功能描述:AAT3783 Series 1 A Linear Li-Ion/Polymer Battery Charger Evaluation Board |
| AAT3783AIRN-4.2-T1 | 制造商:Skyworks Solutions Inc 功能描述:IC CHARGER LI-ION/POLY 制造商:SKYWORKS SOLUTIONS 功能描述:AAT3783 Series 7.5 V 1-A Linear Li-Ion/Polymer Battery Charger - TDFN33-16 制造商:Skyworks Solutions Inc 功能描述:POWER MANAGEMENT IC |
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