L6751 datasheet(55/59 Pages) STMICROELECTRONICS

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L6751

PMBus support (preliminary)

Doc ID 023992 Rev 1

55/59

12.5

Output voltage monitoring (READ_VOUT)

The dedicated PMBus command allows the user to monitor output voltage for both sections.

The L6751 returns the value of the programmed VID in VID LSBs (i.e. number of LSBs. C8h

= 200 dec x 5 mV = 1.000 V).

12.6

Output current monitoring (READ_IOUT)

The dedicated PMBus command allows the user to monitor output current for both sections.

The L6751 returns the value of the delivered current by reading IMON voltage (same as

VR12 register 15h) in amperes (linear format, N=0).

12.7

Temperature monitoring (READ_TEMPERATURE)

The dedicated PMBus command allows the user to monitor the temperature of the power

section for multi-phase. The L6751 returns the value of the temperature sensed by NTC

connected on the TM/STM pin (the same as VR12 temperature zone) in degrees Celsius

(linear format, N=0).

12.8

Overvoltage threshold setting

The dedicated MFR_SPECIFIC command allows the user to program specific thresholds for

multi-phase and single-phase sections.

The threshold can be programmed according to Table 17. Different thresholds can be

configured for multi-phase and single-phase sections.

This product is subject to a limited license from Power-One®. related to digital power

technology patents owned by Power-One. This license does not extend to standalone power

supply products.

Table 17.

OV threshold setting

Data byte [Hex]

OC threshold [mV] (above programmed VID)

00h

+175 mV (default)

01h

+225 mV

02h

+275 mV

03h

+325 mV

L6751 Datasheet(PDF) 55 Page - STMicroelectronics