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參數(shù)資料
| 型號： | AAT3689IWP-4.2-T1 |
| 廠商： | Advanced Analog Technology,lnc. |
| 英文描述： | 0.5A/1.0A USB Port/Adapter Lithium-Ion/Polymer Battery Charger |
| 中文描述： | 0.5A/1.0A USB接口/適配器鋰離子電池充電器 |
| 文件頁數(shù)： | 11/20頁 |
| 文件大?。?/td> | 420K |
| 代理商： | AAT3689IWP-4.2-T1 |
AAT3689
0.5A/1.0A USB Port/Adapter
Lithium-Ion/Polymer Battery Charger
3689.2006.11.1.0
11
Figure 1: Current vs. Voltage Profile During Charging Phases.
Preconditioning
Trickle Charge
Phase
Constant Current
Charge Phase
Constant Voltage
Charge Phase
Charge Complete Voltage
Constant Current Mode
Voltage Threshold
Regulated Current
Trickle Charge and
Termination Threshold
I = CC / 10
I = Max CC
Battery Preconditioning
Before the start of charging, the AAT3689 checks
several conditions in order to assure a safe charging
environment. The input supply must be above the
minimum operating voltage, or under-voltage lock-
out threshold (V
UVLO
), for the charging sequence to
begin. Also, the cell temperature, as reported by a
thermistor connected to the TS pin from the battery,
must be within the proper window for safe charging.
When these conditions have been met and a battery
is connected to the BAT pin, the AAT3689 checks
the state of the battery. If the cell voltage is below the
Preconditioning Voltage Threshold (V
MIN
), the
AAT3689 begins preconditioning the cell.
The battery preconditioning trickle charge current is
equal to the fast charge constant current divided by
10. For example, if the programmed fast charge cur-
rent is 500mA, then the preconditioning mode (trick-
le charge) current will be 50mA. Cell preconditioning
is a safety precaution for a deeply discharged bat-
tery and also aids in limiting power dissipation in the
pass transistor when the voltage across the device
is at the greatest potential.
Fast Charge / Constant Current Charging
The cell preconditioning continues until the voltage
on the BAT pin exceeds the Preconditioning Voltage
Threshold (V
MIN
). At this point, the AAT3689 begins
the constant-current fast charging phase. The fast
charge Constant Current (I
CC
) amplitude is deter-
mined by the charge mode, ADP or USB, and is pro-
grammed by the user via the R
SETADP
and R
SETUSB
resistors. The AAT3689 remains in constant current
charge mode until the battery reaches the voltage
regulation point, V
BAT_EOC
.
Constant Voltage Charging
The system transitions to a constant voltage charg-
ing mode when the battery voltage reaches output
charge regulation threshold (V
BAT_EOC
) during the
constant current fast charge phase. The regulation
voltage level is factory programmed to 4.2V (±1%).
The charge current in the constant voltage mode
drops as the battery cell under charge reaches its
maximum capacity.
End of Charge Cycle Termination and
Recharge Sequence
When the charge current drops to 7.5% of the pro-
grammed fast charge current level in the constant
voltage mode, the device terminates charging and
goes into a standby state. The charger will remain
in a standby state until the battery voltage decreas-
es to a level below the battery recharge voltage
threshold (V
RCH
).
When the input supply is disconnected or drops
below UVLO or EN = 0, the charger will automatical-
ly enter power-saving sleep mode. Consuming an
ultra-low 0.3
μ
A in sleep mode, the AAT3689 mini-
mizes battery drain when it is not charging. This fea-
ture is particularly useful in applications where the
input supply level may fall below the battery charge or
under-voltage lockout level. In such cases where the
AAT3689 input voltage drops, the device will enter the
sleep mode and automatically resume charging once
the input supply has recovered from its fault condition.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AAT3690IWP-4.2-T1 | 制造商:Advanced Analogic Tech 功能描述:AAT3690 Series 4 - 5.5 V 1A USB Port/Adapter Lithium-Ion/Polymer Battery Charger 制造商:SKYWORKS SOLUTIONS 功能描述:AAT3690 Series 4 - 5.5 V 1A USB Port/Adapter Lithium-Ion/Polymer Battery Charger 制造商:Skyworks Solutions Inc 功能描述:POWER MANAGEMENT IC |
| AAT3691IRN-4.2-T1 | 制造商:SKYWORKS SOLUTIONS 功能描述:AAT3691 Series 1.6 A 28 V Dual Input 1.6 A Linear Charger - TDFN-16 |
| AAT3692IRN-4.2-T1 | 功能描述:電池管理 2 Input 1.6A Linear Chrg w/28V OVP 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 |
| aat3693idh-aa-db1 | 制造商:Skyworks Solutions Inc 功能描述:AAT3693 Series 1.6 A Lithium-Ion/Polymer Battery Charger Eval Board |
| AAT3693IDH-AA-T1 | 功能描述:電池管理 Lithium-Ion/Polymer Batt Charger 1.6A 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 |
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