LM5064PMHSLASHNOPB datasheet(34/64 Pages) TI2

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LM5064

SNVS718E – JUNE 2011 – REVISED FEBRUARY 2013

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Table 5. OT_FAULT_LIMIT Register

Value

Meaning

Default

0h – 0FFEh

Over-temperature Fault threshold value

0960h (150°C)

0FFFh

Over-temperature Fault detection disabled

n/a

OT_WARN_LIMIT (51h)

The OT_WARN_LIMIT command is a standard PMBus command that allows configuring or reading the threshold

for the over-temperature warning detection. Reading and writing to this register should use the coefficients

shown in Table 41. Accesses to this command should use the PMBus read or write word protocol. If the

measured temperature exceeds this value, an over-temperature warning is triggered and the OT WARN flags set

in the respective registers and the SMBA signal asserted. A single temperature measurement is an average of

16 round-robin cycles; therefore, the minimum temperature warn detection time is 16 ms.

Table 6. OT_WARN_LIMIT Register

Value

Meaning

Default

0h – 0FFEh

Over-Temperature Warn threshold value

07D0h (125°C)

0FFFh

Over-Temperature Warn detection disabled

n/a

VIN_OV_WARN_LIMIT (57h)

The VIN_OV_WARN_LIMIT command is a standard PMBus command that allows configuring or reading the

threshold for the VIN over-voltage warning detection. Reading and writing to this register should use the

coefficients shown in Table 41. Accesses to this command should use the PMBus read or write word protocol. If

the measured value of VIN falls below the value in this register, VIN OV Warn flags are set in the respective

registers and the SMBA signal is asserted.

Table 7. VIN_OV_WARN_LIMIT Register

Value

Meaning

Default

0h – 0FFEh

VIN Over-Voltage Warning detection

0FFFh (disabled)

threshold

0FFFh

VIN Over-Voltage Warning disabled

n/a

VIN_UV_WARN_LIMIT (58h)

The VIN_UV_WARN_LIMIT command is a standard PMBus command that allows configuring or reading the

threshold for the VIN under-voltage warning detection. Reading and writing to this register should use the

coefficients shown in Table 41. Accesses to this command should use the PMBus read or write word protocol. If

the measured value of VIN falls below the value in this register, VIN UV Warn flags are set in the respective

Table 8. VIN_UV_WARN_LIMIT Register

Value

Meaning

Default

1h – 0FFFh

VIN Under-Voltage Warning detection

0000h (disabled)

threshold

0000h

VIN Under-Voltage Warning disabled

n/a

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