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HMC980 vs HMC981

Category: Hardware
Product Number: HMC980; HMC981


I am doing some DC tests using an Electronic Load on HMC980 and HMC981 DevBoards, an I'm having different results.


  • Does not matter what sequence VDIG and VDD are applied. It just works.
  • EN pin enables and disables VDRAIN and VGATE as intended, and does not cause it to latch.


  • VDIG needs to be turned on AFTER VDD, contrary to graph in datasheet.
  • When disabling the ABC using the EN pin it latches off, requiring power cycle of VDIG.

Would you know why this difference in the power up sequence and EN pin behaviour?


Mateus Ohse