SLUSF28 Data sheet

SLUSF28 November 2023 TPS546A24S

PRODUCTION DATA

Package Options

Mechanical Data (Package|Pins)

RVF|40
- MPQF268C

Thermal pad, mechanical data (Package|Pins)

RVF|40
- QFND333E

Orderable Information

6.6.42 (4Fh) OT_FAULT_LIMIT

CMD Address	4Fh
Write Transaction:	Write Word
Read Transaction:	Read Word
Format:	SLINEAR11 per CAPABILITY
Phased:	Yes
NVM Back-up:	EEPROM
Updates:	On-the-fly

The OT_FAULT_LIMIT command sets the value of the temperature limit, in degrees Celsius, that causes an overtemperature fault condition.

The converter response to an overtemperature event is described in OT_FAULT_RESPONSE.

Figure 6-48 (4Fh) OT_FAULT_LIMIT Register Map

15	14	13	12	11	10	9	8
RW	RW	RW	RW	RW	RW	RW	RW
OTF_EXP					OTF_MAN

7	6	5	4	3	2	1	0
RW	RW	RW	RW	RW	RW	RW	RW
OTF_MAN

LEGEND: R/W = Read/Write; R = Read only

Table 6-59 Register Field Descriptions

Bit	Field	Access	Reset	Description
15:11	OTF_ EXP	RW	00000b	Linear format two’s complement exponent
10:0	OTF_ MAN	RW	NVM	Linear format two’s complement mantissa. Refer to the following text.

Attempts to write (4Fh) OT_FAULT_LIMIT to any value outside those specified as valid will be considered invalid/unsupported data and cause the TPS546A24S to respond by flagging the appropriate status bits and notifying the host according to the PMBus 1.3.1 Part II specification section 10.9.3.

Command Resolution and NVM Store/Restore Behavior

The (4Fh) OT_FAULT_LIMIT command is implemented using the TPS546A24S internal telemetry system. As a result, the value of this command can be programmed with very high resolution using the linear format. However, the TPS546A24S provides only limited NVM-backed options for this command. Following a power-cycle or NVM Store/Restore operation, the value will be restored to the nearest NVM supported value. The NVM supports values from 0°C to 160°C in 1°C steps. Programming a value of 255°C will disable Programmable Overtemperature Fault Limit without disabling the on-die Bandgap thermal shutdown.