System and method for power supply controls for selection of voltage operation
A system for controlling voltage operation of a power supply unit (PSU) for an information handling system. If the PSU is established as a High-Line power supply and is a dual wattage unit, Low-Line capabilities are disabled and the PSU turns off if power drops below a High-Line minimum voltage. If the PSU is established as a Low-Line PSU or is not dual wattage unit, the PSU is maintained in a current operational state and is either reset or turned off before making changes.
1. A method for controlling voltage operation of a power supply unit (PSU) in an information handling system, the method comprising:
determining if a High-Line Only bit is set, wherein:
if the High-Line Only bit is set, determining if a current line status is High-Line;
if the current line status is High-Line, determining if the PSU is a dual wattage unit;
if the PSU is a dual wattage unit, enabling High-Line Only voltage settings;
if the PSU is not a dual wattage unit, determining if a PS_ON setting is disabled;
if the PS_ON is enabled, de-asserting a V IN _GOOD setting, changing a set of Low-Line settings to a set of High-Line Only settings and asserting the V IN _GOOD setting;
if the PS_ON setting is disabled, determining if the High-Line Only bit is reset;
if the High-Line Only bit is not set, determining if the PSU is off due to low input voltage;
if the PSU is off due to low input voltage, disabling High-Line Only settings and asserting the V IN _GOOD setting;
if the PSU is not due to low input voltage, determining if the PS_ON is disabled; and
if the PS_ON is disabled, de-asserting the V IN _GOOD setting, disabling High-Line Only settings and asserting the V IN _GOOD setting.
2. The method of claim 1 , further comprising determining the input voltage is greater than a minimum input voltage level before asserting the V IN _GOOD setting.
3. The method of claim 1 , further comprising storing the High-Line Only bit in non-volatile memory.
4. The method of claim 1 , further comprising maintaining the PSU in a Low Line mode until the PS_ON setting is disabled.
5. The method of claim 1 , further comprising:
determining that the PSU is a dual wattage unit; and
determining to enable the PSU for High-Line Only operation based upon other operational PSUs in the system.
6. The method of claim 1 , wherein the High-Line Only settings include input voltage turn-on and turn-off voltages, brown-out voltage settings and input over-current settings.
7. A system for controlling voltage operations in a Power Supply Unit (PSU), the system comprising:
a memory medium storing a set of voltage operation settings; and
a microcontroller unit (MCU) in the PSU, the MCU configured to:
determine if a High-Line Only bit is set in the memory medium, wherein:
if the High-Line Only bit is set, determine if a current line status is High-Line;
if the current line status is High-Line, determine if the PSU is a dual wattage unit;
if the PSU is a dual wattage unit, enable High-Line Only voltage settings;
if the PSU is not a dual wattage unit, determine if a PS_ON setting is disabled;
if the PS_ON setting is enabled, de-assert a V IN _GOOD setting, change a set of Low-Line settings to a set of High-Line Only settings and assert the V IN _GOOD setting;
if the PS_ON setting is disabled, determine if the High-Line Only bit is reset; and
if the High-Line Only bit is not set, determine if the PSU is off due to low input voltage;
if the PSU is off due to low input voltage, disable High-Line Only settings and assert the V IN _GOOD setting;
if the PSU is not due to low input voltage, determine if the PS_ON is disabled;
if the PS_ON is disabled, de-assert the V IN _GOOD setting, disable High-Line Only settings and assert the V IN _GOOD setting.
8. The system of claim 7 , wherein the MCU is further configured to determine the input voltage is greater than a minimum input voltage level before asserting the V IN _GOOD setting.
9. The system of claim 7 , wherein the MCU is further configured to store the High-Line Only bit in non-volatile memory.
10. The system of claim 7 , wherein the MCU is further configured to maintain the PSU in a Low Line mode until the PS_ON setting is disabled.
11. The system of claim 7 , wherein the MCU is further configured to:
determine that the PSU is a dual wattage unit; and
determine to enable the PSU for High-Line Only operation based upon other operational PSUs in the system.
12. The system of claim 7 , wherein the High-Line Only settings include input voltage turn-on and turn-off voltages, brown-out voltage settings and input over-current settings.
13. An information handling system, comprising:
a processor subsystem;
a memory subsystem storing information; and
a power supply unit (PSU) for providing power at a voltage to the information handling system, the PSU comprising:
a memory medium storing a set of voltage operation settings; and
a microcontroller unit (MCU) in the PSU, the MCU configured to:
determine if a High-Line Only bit is set in the memory medium, wherein:
if the High-Line Only bit is set, determine if a current line status is High-Line;
if the current line status is High-Line, determine if the PSU is a dual wattage unit;
if the PSU is a dual wattage unit, enable High-Line Only voltage settings;
if the PSU is not a dual wattage unit, determine if a PS_ON setting is disabled;
if the PS_ON setting is enabled, de-assert a V IN _GOOD setting, change a set of Low-Line settings to a set of High-Line Only settings and assert the V IN _GOOD setting;
if the PS_ON setting is disabled, determine if the High-Line Only bit is reset; and
if the High-Line Only bit is not set, determine if the PSU is off due to low input voltage;
if the PSU is off due to low input voltage, disable High-Line Only settings and assert the V IN _GOOD setting;
if the PSU is not due to low input voltage, determine if the PS_ON is disabled; and
if the PS_ON is disabled, de-assert the V IN _GOOD setting, disable High-Line Only settings and assert the V IN _GOOD setting.
14. The information handling system of claim 13 , wherein the MCU is further configured to determine the input voltage is greater than a minimum input voltage level before asserting the V IN _GOOD setting.
15. The information handling system of claim 13 , wherein the MCU is further configured to store the High-Line Only bit in non-volatile memory.
16. The information handling system of claim 13 , wherein the MCU is further configured to maintain the PSU in a Low Line mode until the PS_ON setting is disabled.
17. The information handling system of claim 13 , wherein the MCU is further configured to:
determine that the PSU is a dual wattage unit; and
determine to enable the PSU for High-Line Only operation based upon other operational PSUs in the system.
18. The information handling system of claim 13 , wherein the High-Line Only settings include input voltage turn-on and turn-off voltages, brown-out voltage settings and input over-current settings.