Industrial and factory automation systems — including PLCs and digital output modules — routinely drive highly inductive loads, such as solenoid valves, relay coils, and actuators, where the stored energy in the inductor generates potentially damaging voltage flyback transients at turn-off. To validate real-world robustness under these conditions, the DRV81545 and DRV81646 were tested driving all four channels simultaneously into a representative inductive load (1.2H + 40Ω) at 24V, PWM-switched at 1Hz with a 50% duty cycle — conditions directly reflecting a customer use case. All three integrated demagnetization decay modes (slow, fast, and fastest) were exercised, as the best decay strategy depends on system-level constraints such as external clamp topology and switching speed requirements.

Both devices passed across all applicable decay modes, and the DRV81646 was further validated at 48V, demonstrating practicality for higher-voltage industrial bus environments. This test confirms that the DRV81x4x family can reliably manage inductive energy recirculation across the full range of decay configurations, giving PLC and industrial digital output module designers confidence in safe, flexible, multi-channel operation without the need for additional external protection components.