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參數(shù)資料
| 型號： | AAT3686IXN-4.2-1-T1 |
| 廠商： | Advanced Analog Technology,lnc. |
| 英文描述： | USB Port/AC Adapter Lithium-Ion/Polymer Battery Charger |
| 中文描述： | USB接口/ AC適配器鋰離子電池充電器 |
| 文件頁數(shù)： | 19/24頁 |
| 文件大?。?/td> | 528K |
| 代理商： | AAT3686IXN-4.2-1-T1 |
AAT3686
USB Port/AC Adapter
Lithium-Ion/Polymer Battery Charger
3686.2006.10.1.9
19
Thermal Considerations
The AAT3686 is offered in a 3x4mm TDFN pack-
age and a 4x4mm TDFN package, each of which
can provide up to 2.7W of power dissipation when
it is properly bonded to a printed circuit board and
has a maximum thermal resistance of 37°C/W.
Many considerations should be taken into account
when designing the printed circuit board layout, as
well as the placement of the charger IC package in
proximity to other heat generating devices in a
given application design. The ambient temperature
around the charger IC will also have an effect on
the thermal limits of a battery charging application.
The maximum limits that can be expected for a
given ambient condition can be estimated by the
following discussion:
First, the maximum power dissipation for a given
situation should be calculated:
Eq. 1:
Where:
P
D
V
IN
= Total power dissipation by the device
= Either V
ADP
or V
USB
, depending on which
mode is selected
V
BAT
= Battery voltage as seen at the BAT pin
I
CC
= Maximum constant fast charge current pro-
grammed for the application
I
OP
= Quiescent current consumed by the charg-
er IC for normal operation
Next, the maximum operating ambient temperature
for a given application can be estimated based on
the thermal resistance of the 3x4mm and 4x4mm
TDFN packages when sufficiently mounted to a
PCB layout and the internal thermal loop tempera-
ture threshold.
Eq. 2:
Where:
T
A
T
J
= Ambient temperature in degrees C
= Maximum device junction temperature
below the thermal loop threshold
P
D
θ
JA
= Total power dissipation by the device
= Package thermal resistance in °C/W
T
A
= T
J
- (
θ
JA
· P
D
)
P
D
= [(V
IN
- V
BAT
) · I
CC
+ (V
IN
· I
OP
)]
Timing Diagram
SQ
SQ
PULSE
Data
System Reset
System Start
CK
T
SYNC
T
LAT
N=1
N=2
N=3
T
OFF
T
DATA(RPT)
= T
SYNC
+ T
LAT
< 2.5 P
DATA
T
OFF
DATA
P
DATA
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AAT3686IXN-4.2-T1 | USB Port/AC Adapter Lithium-Ion/Polymer Battery Charger |
| AAT3687 | Lithium-Ion/Polymer Battery Charger |
| AAT3687IWP-4.2-1-T1 | Lithium-Ion/Polymer Battery Charger |
| AAT3687IWP-4.2-2-T1 | Lithium-Ion/Polymer Battery Charger |
| AAT3687IWP-4.2-T1 | Lithium-Ion/Polymer Battery Charger |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AAT3687IWP-4.2-1-T1 | 制造商:Skyworks Solutions Inc 功能描述:POWER MANAGEMENT IC |
| AAT3687IWP-4.2-T1 | 制造商:Skyworks Solutions Inc 功能描述:POWER MANAGEMENT IC |
| AAT3688AIWP-4.2-DB1 | 制造商:Skyworks Solutions Inc 功能描述:AAT3688 Series USB Port Lithium-Ion/Polymer Battery Charger Evaluation Board |
| AAT3688AIWP-4.2-T1 | 制造商:Skyworks Solutions Inc 功能描述:Battery Management 1A USB Port LI-Ion Polymer Battery Chgr 制造商:Skyworks Solutions Inc 功能描述:POWER MANAGEMENT IC |
| AAT3688IWP-4.2-T1 | 制造商:SKYWORKS SOLUTIONS 功能描述:AAT3688 Series 5.5 V USB Port Lithium-Ion/Polymer Battery Charger - TDFN33-12 制造商:Skyworks Solutions Inc 功能描述:POWER MANAGEMENT IC |
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