Mlv Design Guide Page 19 Appendix

GENERAL APPLICATIONS Providing protection against ESDs is a significant concern when designing wearable devices, smart phones, computers, televisions, or other electronics. Every time a user touches a screen, pushes a button, or plugs/unplugs a data cable, there is an opportunity for potentially damaging ESD and transient surges. The same threats exist for other consumer electronics (LCD/ LED TVs, set-top boxes, MP3/PMP players, and many others). Whether the application is a home appliance, a smart phone, or an industrial panel, as long as there is EMC susceptibility, MLV devices offer a smart way to protect it. The MLV devices can well protect I/O ports like audio lines, USB ports, and RS-232 interfaces where ESD could otherwise gain access. Audio I/Os like the earphone jack, can allow ESD to penetrate the audio IC and can cause damage due to the low-speed line in nature, MLVs are ideal for such applications. The characteristics and location of an MLV device will protect the video system from most over-voltage surges that might occur on the S-video input lines. The MLV devices can be applied in interface circuits, like a control line for microprocessors. Control MLV Button VCC Interface Connector CPU MLV MLV MLV SPK+ SPK- R MLV Speaker Outside World Luminance Chrominance (2) V9MLA0402 L-GND C-GND Shield Ground S-video plug Video DAC/ADC The MLV devices are ideal for ESD protection of buttons, control keys, or anywhere an ESD path can be formed. 2016 Littelfuse Multilayer Varistors (MLVs) Design Guide www.littelfuse.com Surface Mount Multilayer Varistors (MLVs) Design Guide Appendix I - General Application Examples 19

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