- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄381238 > AAT3687IWP-4.2-1-T1 (Advanced Analog Technology,lnc.) Lithium-Ion/Polymer Battery Charger PDF資料下載
參數(shù)資料
| 型號(hào)： | AAT3687IWP-4.2-1-T1 |
| 廠商： | Advanced Analog Technology,lnc. |
| 英文描述： | Lithium-Ion/Polymer Battery Charger |
| 中文描述： | 鋰離子電池充電器 |
| 文件頁(yè)數(shù)： | 17/22頁(yè) |
| 文件大?。?/td> | 526K |
| 代理商： | AAT3687IWP-4.2-1-T1 |
第1頁(yè)第2頁(yè)第3頁(yè)第4頁(yè)第5頁(yè)第6頁(yè)第7頁(yè)第8頁(yè)第9頁(yè)第10頁(yè)第11頁(yè)第12頁(yè)第13頁(yè)第14頁(yè)第15頁(yè)第16頁(yè)當(dāng)前第17頁(yè)第18頁(yè)第19頁(yè)第20頁(yè)第21頁(yè)第22頁(yè)
AAT3687
Lithium-Ion/Polymer Battery Charger
3687.2006.10.1.7
17
Thermal Considerations
The AAT3687 is offered in a 3x3mm TDFN pack-
age which can provide up to 2.0W of power dissi-
pation when it is properly bonded to a printed cir-
cuit board and has a maximum thermal resistance
of 50°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 gen-
erating devices in a given application design. The
ambient temperature around the charger IC will
also have an effect on the thermal limits of a bat-
tery 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. 5:
Where:
P
D
V
IN
V
BAT
= Battery Voltage as Seen at the BAT Pin
I
CC
= Maximum Constant Fast Charge Current
Programmed for the Application
= Total Power Dissipation by the Device
= Input Voltage Amplitude, V
ADP
I
OP
= Quiescent Current Consumed by the
Charger IC for Normal Operation
Next, the maximum operating ambient temperature
for a given application can be estimated based on
the thermal resistance of the 3x3mm TDFN pack-
age when sufficiently mounted to a PCB layout and
the internal thermal loop temperature threshold.
Eq. 6:
Where:
T
A
= Ambient Temperature in °C
T
J
= Maximum Device Junction Temperature
Below the Thermal Loop Threshold
P
D
= Total Power Dissipation by the Device
θ
JA
= Package Thermal Resistance in °C/W
Example:
For an application where the fast charge current for
the adapter mode is set to 1A, V
ADP
= 5.0V and the
battery voltage at 3.6V, what is the maximum ambi-
ent temperature at which the thermal loop will
become active
Given:
V
ADP
= 5.0V
V
BAT
= 3.6V
I
CC
= 1A
I
OP
= 0.75mA
T
J
= 110°C
θ
JA
= 50°C/W
Using Equation 5, calculate the device power dissi-
pation for the stated condition:
Eq. 7:
The maximum ambient temperature before the
AAT3687 thermal loop becomes active can now be
calculated using Equation 6:
Eq. 8:
Therefore, under the stated conditions for this
worst case power dissipation example, the
AAT3687 will enter the thermal loop and lower the
fast charge constant current when the ambient
operating temperature rises above 39.8°C.
T
A
= 110
°
C -
(
50
°
C/W
·
1.40375W)
= 39.8125
°
C
P
D
= (5.0V - 3.6V)
(1A)
+ (5.0V
·
0.75mA)
= 1.40375W
T
A
= T
J
- (
θ
JA
·
P
D
)
P
D
= [(V
IN
- V
BAT
)
·
I
CC
+ (V
IN
·
I
OP
)]
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AAT3687IWP-4.2-2-T1 | Lithium-Ion/Polymer Battery Charger |
| AAT3687IWP-4.2-T1 | Lithium-Ion/Polymer Battery Charger |
| AAT3688 | USB Port Lithium-Ion/Polymer Battery Charger |
| AAT3688IWP-4.2-T1 | USB Port Lithium-Ion/Polymer Battery Charger |
| AAT3689 | 0.5A/1.0A USB Port/Adapter Lithium-Ion/Polymer Battery Charger |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 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 |
| 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 |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。