430 datasheet(71/71 Pages) INTEL

71 / 71 page

Datasheet

Thermal Specifications and Design Considerations

reached its maximum operating temperature or be driven from an external source to

activate the TCC. The ability to activate the TCC via PROCHOT# can provide a means

for thermal protection of system components.

When PROCHOT# is driven by an external agent, TM1 is enabled and the processor

core will have their core clocks modulated.

One application is the thermal protection of voltage regulators (VR). System designers

can create a circuit to monitor the VR temperature and activate the TCC when the

temperature limit of the VR is reached. By asserting PROCHOT# (pulled-low) and

activating the TCC, the VR can cool down as a result of reduced processor power

consumption. Bi-directional PROCHOT# can allow VR thermal designs to target

maximum sustained current instead of maximum current. Systems should still provide

proper cooling for the VR, and rely on bi-directional PROCHOT# only as a backup in

case of system cooling failure. The system thermal design should allow the power

delivery circuitry to operate within its temperature specification even while the

processor is operating at its TDP. With a properly designed and characterized thermal

solution, it is anticipated that bi-directional PROCHOT# would only be asserted for very

short periods of time when running the most power intensive applications. An under-

designed thermal solution that is not able to prevent excessive assertion of PROCHOT#

in the anticipated ambient environment may cause a noticeable performance loss.

Contact your Intel representative for details on implementing the bi-directional

PROCHOT# feature.

430 Fiches technique(PDF) 71 Page - Intel Corporation