Hi Fernando,
The layout also appears to be good. Please look at the outputs, VCC, and VM with a scope. This usually provides more information.
From your description, there could be a problem that the outputs are switching on and off. This could be caused by undervoltage, overcurrent, or thermal issues. If it is undervoltage this will also appear at the VM and VCC pins.
The layout also appears to be good. Please look at the outputs, VCC, and VM with a scope. This usually provides more information.
From your description, there could be a problem that the outputs are switching on and off. This could be caused by undervoltage, overcurrent, or thermal issues. If it is undervoltage this will also appear at the VM and VCC pins.