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AAT4621EV: Evaluation kit guide for AAT4621 PC card supercap charger

Posted: 27 Jun 2008 ?? ?Print Version ?Bookmark and Share

Keywords:application note? power control? PC card? supercapacitor charger?

The AAT4621EV evaluation kit is a fully assembled and tested circuit board designed to demonstrate the features of the AAT4621 SmartSwitch supercapacitor charger. The board accepts a 3V to 5.5V supply and provides the power control loop, reverse blocking and temperature foldback required to charge high capacitance supercapacitors for applications such as PC cards and other portable high current requirements. Numerous test points are available to connect input/output control signals for system integration and to ease measurements of key parameters. Jumpers are included to enable/disable the device or to connect to a logic level for on/off control.

The AAT4621 uses very few external components, The current limit is set by two external resistors allowing a 10 percent current limit accuracy over the normal operating temperature range. The switch can be controlled from either of the two enable inputs and in the off condition will block currents in both directions. The AAT4621 also incorporates a system ready function, which can advise the system that the supercapacitor is fully charged and ready for use. Adjustable hysteresis is provided with the addition of an external resistor.

The AAT4621EV kit is shipped with the AAT1162IWO and a 550mF CAPXX supercapacitor installed and the device is programmed to the high charge current limit level.

View the PDF document for more information.





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