STMicroelectronics AN495 Application Note for TDE1707 Filtering

About this manual

The document provides guidance on implementing filter capacitors in circuits using the TDE1707 industrial P.S. (intelligent power switch). It addresses voltage variations caused by connection wire inductance during power-on or load changes, which can lead to overvoltage on the +Vs pin or internal circuit disturbances.

What's inside

• Introduction
• Effective filtering
• Filtering the overvoltage on the +Vs
• Immunity problems in the circuit
• Test circuit

Frequently asked questions

Where should filter capacitors be placed for the TDE1707?

Filter capacitors are recommended on both the power supply (+Vs pin) and the +5 V regulated voltage (Vreg pin).

What is the maximum current the TDE1707 can deliver to a load?

The device can deliver up to 0.5 A to a configurable load.

What voltage rating must the capacitor on the +Vs pin meet?

The capacitor must be rated for 25-50 V to handle the +Vs bus voltage.

What capacitance value is recommended for the Vreg pin in most practical cases?

A 4.7 nF capacitor is sufficient for the Vreg pin in most practical cases.