SN75461P datasheet by Texas Instruments

SN75461P Frequently Asked Questions (FAQs)

• What is the maximum current that can be sourced or sunk by each output?
  The maximum current that can be sourced or sunk by each output is 1A, but it's recommended to limit it to 500mA for reliable operation.
• How do I handle the heat dissipation of the SN75461P?
  The SN75461P has a thermal pad on the bottom, so it's essential to provide a good thermal connection to the PCB or a heat sink to dissipate heat. A thermal interface material can be used to improve heat transfer.
• What is the purpose of the enable pins (1EN and 2EN) and how do I use them?
  The enable pins (1EN and 2EN) are used to enable or disable the respective half-bridge drivers. A logic high on the enable pin enables the driver, while a logic low disables it. This can be used to implement PWM control or to shut down the driver when not in use.
• How do I protect the SN75461P from back-EMF and voltage spikes?
  It's recommended to use a flyback diode or a TVS diode across the motor windings to protect the SN75461P from back-EMF and voltage spikes. Additionally, a capacitor can be used to filter out high-frequency noise.
• What is the recommended layout and PCB design considerations for the SN75461P?
  A good layout and PCB design are crucial for the SN75461P. Keep the high-current paths short and wide, use a solid ground plane, and separate the analog and digital sections. Also, ensure that the thermal pad is properly connected to the PCB or a heat sink.