ST AN1213 handbook

About this manual

This document evaluates the TDE1707 power switch, specifically designed for proximity detectors, focusing on its performance in industrial environments. It compares the noise immunity of the original silicon version against the improved TDE1707-B (Rev. B) version using IEC 801/4 burst immunity tests. The analysis details how external capacitors affect immunity levels and identifies the optimal capacitor values for both silicon revisions.

What's inside

• Noise Immunity
• Burst Immunity Testing
• Short Circuit Protection
• Reverse Output Connection
• Capacitor Configuration
• Layout Recommendations
• TDE1707 vs TDE1707 Rev. B

Specifications

Frequently asked questions

What is the recommended capacitor value for the TDE1707 Rev. B to ensure short circuit protection?

A delay capacitor of 68pF on pin 3 is required to prevent protection failure at turn-on when the device is cold.

How does the TDE1707 Rev. B perform regarding noise immunity compared to the old version?

The Rev. B version has higher immunity; without a delay capacitor, it withstands +2500 / -2500 V, whereas the old version only reaches +300 / -800 V without an output capacitor.

What capacitor value is recommended for the output to improve noise immunity?

A capacitor of 1nF between ground and output (C3) or between Vcc and output is sufficient to gain correct operation with a burst amplitude of +2500 / -2500 V.