Accessing main ATX outputs without monitoring all outputs

Details Accessing main ATX outputs without monitoring all outputs Accessing main ATX outputs without monitoring all outputs

2005-04-19

2005-04-19

Hoff, Marc S. (Department: 2857)

Data processing: measuring, calibrating, or testing

Measurement system in a specific environment

Electrical signal parameter measurement system

C702S057000, C702S089000, C702S189000, C340S870390, C340S455000, C340S693100, C340S007320, C324S433000, C324S607000, C324S076110, C327S058000, C327S161000, C327S547000, C700S022000, C700S027000, C700S297000

Reexamination Certificate

active

06882942

ABSTRACT:
A power monitor circuit and method delays the start of a computer until multiple power lines are at a safe level of operation. The integrated circuit monitors only the voltage of a primary power supply output and eliminates the need for monitor circuits on each supply output. The power supply is made to exacting specifications that tie the 5 volt and 3.3 volt supplies to the primary 12 volt supply. The ATX power supply drives the 3.3 and 5.0 supplies to reach 90% of their values within 40 ms after the 12 volt supply reaches 90% of its value. A time delay circuit25delays switching the 3.3 and 5 volt dual outputs from the standby voltage supply to the active voltage supplies until after the primary 3.3 and 5 volt are at a safe operating level.

REFERENCES:
National Semiconductor, LM2637 Motherboard Power Supply Solution with a 5-Bit Programmable Switching Controller and Twol Linear Regulator Controllers, Published on Oct. 1998.*
Kelly, ‘A Soft Starting AC Voltage Regulator’, 1992, IEEE, pp. 184-185.*
Duduman, Bogdan, M., “Advanced PWM and Dual Linear Power Control”, Intersil Corporation 1999, pp. 2-210-2-223.
Duduman, Bogdan, M., “Total Power Conversion Solutions for Computer Motherboards Using HIP6017, HIP6019 Controller ICs”, Intersil Corporation 1999, pp. 4-67-4-77.
Duduman, Bogdan, M., “Triple Linear Power Controller with ACPI Control Interface”, Intersil Corporation 2000, pp. 1-14.
Duduman, Bogdan, M., “Power Management IC Simplifies ACPI Implementation (HIP6501AEVAL1)”, Intersil Corporation 1999, pp. 4-148-4-158.

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