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Article: Choosing the best capacitor for wireless devices and charger control circuits: for small portable wireless devices size is the predominant factor in selecting the capacitor, although the DC leakage and/or ESR are critical electrical parameters which must not be overlooked.(EYE ON CAPACITORS)
- Article from:
- Wireless Design & Development
- Article date:
- May 1, 2009
- Author:
CopyrightCOPYRIGHT 2009 Advantage Business Media. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
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There are many types of portable battery operated wireless devices and a wide range of choices of charger control circuits that reliably power the devices. Careful selection of passive components, such as tantalum and MLCC capacitors, can improve the overall performance capability of the charger control and energy storage system in these portable devices.
Multiple DC voltage levels are required for proper operation of portable wireless devices, but they cannot be supported purely from the battery. The voltages vary and are usually too high or too low for standard batteries to support, especially when the battery is in the discharge mode. Capacitors used in the ...