Circuit Protection - Mobile Devices
Mobile Devices
TE Circuit Protection devices help safeguard mobile and portable devices from damage from thermal / overcurrent events, ESD breakdown, and improper charging.
When an unsuitable or faulty USB cable is plugged into the USB port, the applied voltage, polarity and permitted current may exceed the specifications of the power regulation circuits. This can damage the equipment and could become a safety concern. PolySwitch devices limit the flow of dangerously high currents during fault conditions and reset back to normal operating mode once the fault condition is removed; while PolyZen devices help clamp the voltage and shunt excess power to ground.
A PolySwitch resettable device can be thermally linked to the the LCD (Liquid Crystal Display) glass. It will “thermally trip” thus reducing the current flowing through the heating element. If the control circuitry fails to turn off the element, the current flowing through the heating element can increase and lead to thermal runaway.
External shorts, runaway charging conditions, or abusive charging can cause considerable damage to primary and secondary lithium cells. Rechargeable lithium batteries are used in notebook computers and cellular phones, as well as other portable electronic applications.
PolySwitch devices help protect against overcurrent and overtemperature fault conditions by limiting the flow of current in the DC input power port circuit.
Extremely low capacitance ESD protection devices, such as Raychem PESD devices, help shunt ESD away from sensitive circuitry in mobile device buttons and keyboards without inducing signal distortion.
An electrostatic discharge or ESD event can result in damage to the device. Extrememly low capacitance ESD protection devices such as our PESD devices help shunt ESD away from sensitive circuitry without inducing signal distortion.
Gas Discharge Tubes (GDTs) help protect the sensitive data transmission lines equipment by switching to a low impedance state, and diverting energy away from the equipment.
ESD damage to a LED can cause permanent failure. If an LED does not have built-in ESD protection, a PESD protection device placed in parallel with the LED can help protect against ESD damage.
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