AAT3697 データシートの表示（PDF） - Advanced Analogic Technologies

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AAT3697

2A Lithium-Ion/Polymer Battery Charger

Advanced Analogic Technologies 

BatteryManagerTM

Output Capacitor

The AAT3697 only requires a 1µF ceramic capacitor on

the BAT pin to maintain circuit stability. This value should

be increased to 10µF or more if the battery connection is

made any distance from the charger output. If the

AAT3697 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 10µF

may be required to prevent the device from cycling on

and off when no battery is present.

PRODUCT DATASHEET

AAT3697

2A Lithium-Ion/Polymer Battery Charger

Printed Circuit Board

Layout Considerations

For the best results, it is recommended to physically

place the battery pack as close as possible to the

AAT3697 BAT pin. To minimize voltage drops on the PCB,

keep the high current carrying traces adequately wide.

For maximum power dissipation of the AAT3697 3x3mm

TDFN package, the metal substrate should be solder

bonded to the board. It is also recommended to maxi-

mize the substrate contact to the PCB ground plane layer

to further increase local heat dissipation. Refer to the

AAT3697 evaluation board for a good layout example

(see Figures 4 and 5).

AAT3697 Evaluation Board Layout

Figure 4: AAT3697 Evaluation Board

Component Side Layout.

Figure 5: AAT3697 Evaluation Board

Solder Side Layout.

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