Description:
Many of the latest
processors require a 2-level power supply voltage that must
be dynamically switched. A power supply that satisfies these
requirements can be constructed using a DC/DC controller
specifically designed for VID service. However, substantial
external circuitry is still required to make a functioning,
reliable power supply. Notebook computer manufacturers also
prefer the VID feature because it provides the ability to
change output voltages to support future processor core
voltages. These power supplies are generally programmed for
an output of 1.3 to 1.5 volts at up to 15 Amps of current.
Long life is assured by careful selection of the filter
capacitors and by proper thermal analysis. Overvoltage
protection is a must to prevent a CPU failure in the event
of a power supply overvoltage. Some newer chips require a
single output voltage but with the ability to switch from
amps to tens of amps in 1 uSec or less. All these new
supplies place great demands on the supply. At 10 amps, the
traces and connectors have such a large resistance that, if
not carefully designed they may drop several percent of the
total output voltage.
- DAC, Resistor and
Control pin inputs to select core voltage
possible.
- Very high frequency
switching with low noise outputs.
- Very fast control loops
for fast response.
- +5 to +15 volt
inputs.
- 0.8 to 7.0 volt outputs
at up to 12 amps.
- Efficiencies greater
than 90% possible.
- Short circuit, over
temperature and overvoltage protection a must!
- Connectorized I/O for
reliable, long life operation.
- Power good status
output.
- Environmentally rugged
design, 0 to 70 Deg C operating range, fully ESD
protected.
* Pentium is a registered trademark of Intel
|
Home...
