Self-tuning for refresh rates in a high-bandwidth memory device

A method for adjusting a refresh rate of a memory die in a stack of memory dies, the method comprising:

• receiving a current temperature reading of the memory die and an accumulated temperature signal characterizing temperatures of one or more other memory dies in the stack of memory dies;
• identifying a maximum temperature based on the current temperature reading and the accumulated temperature signal;
• determining, based at least in part on a comparison between the current temperature reading and the identified maximum temperature, a scaling factor for the memory die;
• receiving a set of refresh commands from a host device operably coupled to the stack of memory dies, wherein the received set of refresh commands is based at least in part on the maximum temperature;
• and
• filtering the set of refresh commands by selectively discarding one or more refresh commands of the set of refresh commands based at least in part on the determined scaling factor.

A memory die included in a stack of memory dies, the memory die comprising:

• an array of memory cells;
• a temperature sensor configured to generate a current temperature reading of the memory die;
• and
• a refresh rate adjustment circuit operably coupled to the array of memory cells and the temperature sensor, wherein the refresh rate adjustment circuit is configured to:
• receive the current temperature reading from the temperature sensor,
• receive an accumulated temperature signal characterizing temperatures of one or more other memory dies from temperature sensors of the one or more other memory dies,
• identify a maximum temperature based on the current temperature reading and the accumulated temperature signal,
• determine, based at least in part on a comparison between the current temperature reading and the identified maximum temperature, a scaling factor for the memory die,
• receive a set of refresh commands from a host device operably coupled to the memory die, wherein the received set of refresh commands is based at least in part on the maximum temperature, and
• filter the set of refresh commands by selectively discarding one or more refresh commands of the set of refresh commands based at least in part on the determined scaling factor.