TPIC46L01: Design Reference and Guidelines

Hi Tushar,

thanks for reaching out to us on e2e,

TPIC44L01 or TPIC46L01 is a good choice to drive 4 or 6 FETs with inductive loads and should work for your load current with the right FET. You can control the FETs gate with SPI or parallel interface with a constant controlled 2mA drive current for a stable turn on and off. For open and short load detection a comparator looks at the drain when the FET is off or on and compares the drain voltage to 1.25V or VCOMP fault reference voltage. TPIC46L01 requires the fault register to be cleared by the controller and the TPIC46L02 automatically retrys the output once the fault clears. The over load detection can be viewed as over/under VBAT protection which protects the load and the FETs and automatically recovers after the condition clears. Over load protection can be viewed as protection against inductive load transients that occur when the FET turns off. Internal zener diodes between the gate and drain protects VDS voltage of the FET from reaching its max and the gate to source or ground has a zener to prevent excessive overshoot on the gate as well. External components like a gate resistor or zener close to the gate of the FET can be added to assist the FETs protection as well. Let me know if you have any more questions on this, you can also check out the TPIC46L01/02 datasheet which goes over in detail all TPIC's features mentioned.

thanks,