ZHCSJ23C November 2018 – September 2019 UCC20225-Q1 , UCC20225A-Q1
PRODUCTION DATA.
Setting the DISABLE pin high shuts down both outputs simultaneously. Grounding (or left open) the DISABLE pin allows UCC20225-Q1 family to operate normally. The DISABLE response time is in the range of 20ns and quite responsive, which is as fast as propagation delay. The DISABLE pin is only functional (and necessary) when VCCI stays above the UVLO threshold. It is recommended to tie this pin to ground if the DISABLE pin is not used to achieve better noise immunity.