AAT3682

DATA SHEET

Li-Ion/Polymer Linear Battery Charger

16

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Figure 6: Evaluation Board Top Side Layout.

Figure 7: Evaluation Board Bottom Side Layout.

Schottky Diodes

Schottky diodes are selected for this application because

they have a low forward voltage drop, typically between

at the constant current charge level set by the system;

less power will be dissipated in this element of the cir-

cuit. A Schottky diode allows for lower power dissipation,

smaller component package sizes, and greater circuit

layout densities.

Rectifier Diodes

Any general purpose rectifier diode can be used with the

AAT3682 application circuit in place of a higher cost

Schottky diode. The design trade-off is that a rectifier

will place an input supply voltage requirement for the

battery charger system. This will also require a higher

power rated diode since the voltage drop at the constant

current charge amplitude will be greater. Refer to the