Flyback Diodes for IXF007TA

does the IXF007TA need flyback diodes?

Thought for 1 min 25 sec

For a typical inductive load (motor/solenoid), you generally do not need external flyback diodes with the IFX007TAUMA1. The datasheet states both switches support active freewheeling, and it characterizes the reverse diode forward-voltage for both high-side and low-side; it also notes the diode conduction is only for a few microseconds due to active freewheeling.

When you might still add external protection is when your wiring is long / supply is noisy and you need to control supply/EMI transients:

Add a bulk, low-ESR capacitor close to VS-GND (the datasheet explicitly calls this out as necessary to avoid destructive VS peaks/drops in current-limitation events).
Optionally add a supply clamp like a TVS Diode across VS to GND if your harness/inductance causes big surges.

If you do add an external flyback diode (usually not required here), remember the clamp level is roughly VS + 0.7 V (not an absolute voltage), and size the diode’s current rating to at least the coil/load current (don’t under-rate it with a small rectifier like a 1 A class part). A generic starting point is a Flyback Diode (exact part depends on your load current and PWM conditions).

It’s driving a motor

It’s driving a solenoid

Check my schematic

Review layout placement

list all ICs and the decoupling capacitors attached to each. Ensure to include a...

antonetta388907

@copilot list all ICs and the decoupling capacitors attached to each. Ensure to include all ICs present in the design, including digital ICs, power converters, LDOs, etc. For every IC, clearly state:

What power net the decoupling capacitors are attached to. What is the stated voltage of that net.
The voltage rating and value of the attached decoupling capacitors.
Signal with the expression “[WARNING]” if any of the following conditions are met: no decoupling capacitors are attached; the voltage of the power net is higher than the voltage rating of the capacitor; No voltage range was stated for the capacitor. Give a separate “[WARNING]” for each condition. Signal with the expression “[OK]” if none of those conditions are met
Express the result in a markdown-formatted table

Someone is typing...

INH

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