Application Design Center - Washing Machine
Touch Screen Controller
Solutions
Design Notes:
- Protection Application:
- The periphery of the touch panel could be an entry way for ESD.
- Solution Description:
- The example shown at the left contains four lines for demonstration purposes. The actual number will vary by application. Discrete multilayer varistors are used to provide board layout flexibility.
- Companion Solutions:
- Other solutions within the LF portfolio exist in addition to these recommendations. For example, Diode arrays with different channel counts (2 – 14 lines) can be used to match the actual conditions.
- Regulatory Issues:
- The IEC 61000-4-2 will be the most appropriate standard that applies for these circuits. It supplies a test method for verifying that the end product is not susceptible to ESD events.
- Unique Features:
- Does not apply.
- Application Warnings:
- Does not apply.
