Datasheet

LM25066I, LM25066IA
SNVS824C –JUNE 2012–REVISED MARCH 2013 www.ti.com
Table 4. VOUT_UV_WARN_LIMIT Register
Value Meaning Default
1h – 0FFFh VOUT Under-voltage Warning detection threshold 0000h (disabled)
0000h VOUT Under-voltage Warning disabled n/a
OT_FAULT_LIMIT (4Fh)
The OT_FAULT_LIMIT is a standard PMBus
™
command that allows configuring or reading the threshold for the
Overtemperature Fault detection. Reading and writing to this register should use the coefficients shown in
Table 44. Accesses to this command should use the PMBus
™
read or write word protocol. If the measured
temperature exceeds this value, an overtemperature fault is triggered, the MOSFET is switched off, OT Fault
flags are set in the respective registers, and the SMBA signal is asserted. After the measured temperature falls
below the value in this register, the MOSFET may be switched back on with the OPERATION command. A
single temperature measurement is an average of 16 milliseconds of data. Therefore, the temperature fault
detection time maybe up to 16 ms.
Table 5. OT_FAULT_LIMIT Register
Value Meaning Default
0h – 0FFFh Overtemperature Fault Threshold Value 0FFFh (256°C)
0FFFh Overtemperature Fault detection disabled n/a
OT_WARN_LIMIT (51h)
The OT_WARN_LIMIT is a standard PMBus
™
command that allows configuring or reading the threshold for the
Overtemperature Warning detection. Reading and writing to this register should use the coefficients shown in
Table 44. Accesses to this command should use the PMBus
™
read or write word protocol. If the measured
temperature exceeds this value, an overtemperature warning is triggered, the OT Warn flags are set in the
respective registers, and the SMBA signal is asserted. A single temperature measurement is an average of 16
milliseconds of data. Therefore, the temperature warn detection time maybe up to 16 ms.
Table 6. OT_WARN_LIMIT Register
Value Meaning Default
0h – 0FFFh Overtemperature Warn Threshold Value 0FFFh (256°C)
0FFFh Overtemperature Warn detection disabled n/a
VIN_OV_WARN_LIMIT (57h)
The VIN_OV_WARN_LIMIT 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 44. Accesses to this command should use the PMBus
™
read or write word protocol. If the measured value
of VIN rises above 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 – 0FFFh VIN Over-voltage Warning detection threshold 0FFFh (disabled)
0FFFh VIN Over-voltage Warning disabled n/a
VIN_UV_WARN_LIMIT (58h)
The VIN_UV_WARN_LIMIT 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 44. 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 registers, and the
SMBA signal is asserted.
34 Submit Documentation Feedback Copyright © 2012–2013, Texas Instruments Incorporated
Product Folder Links: LM25066I LM25066IA