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PAC2000S12-B1 PSU
5.2 Deep Sleep Function
The PSU enters deep sleep mode if bit B of PS_CONTROL (CEh) is set to 1.
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When PSUs are connected in parallel, if one PSU enters deep sleep mode and the system communicates with it,
the primary side information including input voltage, current, and power is reported as 0, and secondary side
information is reported based on the actual situation (except that the output voltage and current are reported
as 0).
The deep sleep function is available in both MV12 and MV6 modes. In deep sleep mode:
1.
The PSU input power is less than 1.0 W.
2.
The main power circuit of the PSU is shut down and MV12/SV12 has no output.
3.
The PFC is shut down.
4.
The fan obtains power from the 12 V bus of the PSU.
5.
The PSU supports the intelligent control function through the 12 V bus.
6.
The system can control all PSUs to restore output online.
When PSUs are connected in parallel, the PSU can enter deep sleep mode if all of the following
conditions are met:
1.
The system sets PS_CONTROL (CEh) bit B of the PSU in deep sleep mode to 1.
2.
EFUSEV is less than or equal to 0.8 V.
The PSU can restore output if any of the following conditions is not met:
1.
The bus voltage is less than 5.7 V.
2.
The deep sleep control register is cleared.
3.
EFUSEV is greater than 1.0 V.
5.3 Cold Standby Energy Saving
In the 1+1 application scenario, the PSU (MV12) supports cold standby energy saving mode.
The PSU enters cold standby mode if the following conditions are met.
1.
One PSU is set to be the active unit by running the D0h 0x01 command (The Smart_ON# signal
is at high level).
2.
The other PSU is set to be the standby unit by running the D0h 0x02/0x03/0x04 command and
the Smart_ON# signal is detected to be at high level. This PSU enters cold standby mode.
3.
The total system load is less than 70% of the rated load of a single PSU.
The standby PSU exits from cold standby mode if any of the following conditions is met:
●
The system sends the D0h 0x00 command.
●
The standby PSU restarts.
Technical Manual
5 Energy Saving Feature
26
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