參數(shù)資料
型號(hào)： AAT3687IWP-4.2-2-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)： 18/22頁(yè)
文件大?。?/td> 526K
代理商： AAT3687IWP-4.2-2-T1
AAT3687
Lithium-Ion/Polymer Battery Charger
18
3687.2006.10.1.7
Capacitor Selection
Input Capacitor
In general, it is good design practice to place a
decoupling capacitor between the ADP pin and
ground. An input capacitor in the range of 1
μ
F to
22
μ
F is recommended. If the source supply is
unregulated, it may be necessary to increase the
capacitance to keep the input voltage above the
under-voltage lockout threshold during device
enable and when battery charging is initiated.
If the AAT3687 adapter input is to be used in a sys-
tem with an external power supply source, such as
a typical AC-to-DC wall adapter, then a C
IN
capac-
itor in the range of 10
μ
F should be used. A larger
input capacitor in this application will minimize
switching or power transient effects when the
power supply is "hot plugged" in.
Output Capacitor
The AAT3687 only requires a 1
μ
F ceramic capaci-
tor on the BAT pin to maintain circuit stability. This
value should be increased to 10
μ
F or more if the
battery connection is made any distance from the
charger output. If the AAT3687 is to be used in
applications where the battery can be removed
from the charger, such as with desktop charging
cradles, an output capacitor greater than 10
μ
F may
be required to prevent the device from cycling on
and off when no battery is present.
Printed Circuit Board Layout
Considerations
For the best results, it is recommended to physi-
cally place the battery pack as close as possible to
the AAT3687 BAT pin. To minimize voltage drops
on the PCB, keep the high current carrying traces
adequately wide. For maximum power dissipation
of the AAT3687 3x3mm TDFN package, the metal
substrate should be solder bonded to the board. It
is also recommended to maximize the substrate
contact to the PCB ground plane layer to further
increase local heat dissipation. Refer to the
AAT3687 evaluation board for a good layout exam-
ple (see Figures 4 and 5).
AAT3687 Evaluation Board Layout
Figure 4: AAT3687 Evaluation Board
Component Side Layout.
Figure 5: AAT3687 Evaluation Board
Solder Side Layout.
相關(guān)PDF資料
PDF描述
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
AAT3689IWP-4.2-T1 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
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