Intel R1304BTSSFAN Datasheet download pdf (Page 31)

Intel

Server System R1304BTSSFAN/R1304BTLSFAN/R1304BTLSHBN TPS 350W Power Subsystem

Revision 2.0 23

Intel order number G17455-004

Table 23. Over Load Protection (OCP) Limits

Output Voltage Continuous Load

Current Limit MIN Current Limit MAX

+12V1

18.2A 20A

+12V2

18.2A 20A

+5V

19.2A 24A

+3.3V

12A 15A

-12V

+5VSB

4.5A

4.8.2 Over Voltage Protection (OVP)

Each output shall have individual OVP protection circuits built in and it shall be locally sensed.

The PSU shall shutdown and latch off after an over voltage condition occurs. The output

voltages are measured at the harness connectors. The voltage shall never exceed the

maximum levels when measured at the power pins of the output harness connector during any

single point of fail.

The voltage shall never trip any lower than the minimum levels when

measured at the power pins of the connector.

Table 24. Over Voltage Protection (OVP) Limits

Output Voltage OVP MIN (V) OVP MAX (V)

+3.3V

3.7 4.5

+5V

5.7 6.5

+12V1/+12V2

13.3 15.6

-12V

-13.3 -15.6

+5VSB

5.7 6.5

4.8.3 Over Temperature Protection (OTP)

The power supply shall be protected against over temperature conditions caused by loss of fan

cooling or excessive ambient temperature. In an OTP condition the PSU will shut down. When

the power supply temperature drops to within specified limits, the power supply shall restore

power automatically, while the +5VSB remains always on. The OTP trip level shall have a

minimum of 4°C of ambient temperature hysteresis, so that the power supply will not oscillate

on and off due to temperature recovery condition.

4.9 PMBus

The PMBus features included in this specification are requirements for ac/dc silver box power

supply for use in server systems. This specification is based on the PMBus™ Specifications

Parts I and II, revision 1.1X3.

4.9.1 Related Documents

PMBus™ Power System Management Protocol Specification Part I – General Requirements,

Transport And Electrical Interface; Revision 1.1X3

PMBus™ Power System Management Protocol Specification Part II – Command Language;

Revision 1.1X3 SMBus 2.0.

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