Datasheet

Q1
R1
R2
R3
To
Load
R
S
CARD EDGE
CONNECTOR
PLUG-IN CARD
V
SYS
GND
OUT
PGD
PWR
TIMER
RETRY
SCL
SMBA
VREF
DIODE
VAUX
SENSE
GATE
VIN
UVLO
OVLO
GND
SDA
CB
FB
CL
VDD
ADD0 ADD1 ADD2
LM25066I/A
LM25066I, LM25066IA
www.ti.com SNVS824C –JUNE 2012–REVISED MARCH 2013
Figure 48. Recommended Board Connector Design
PMBus
™
Command Support
The device features an SMBus interface that allows the use of PMBus
™
commands to set warn levels, error
masks, and get telemetry on V
IN
, V
OUT
, I
IN
, V
AUX
, and P
IN
. The supported PMBus
™
commands are shown in
Table 1.
Table 1. Supported PMBus
™
Commands
Number
Default
Code Name Function R/W Of Data
Value
Bytes
01h OPERATION Retrieves or stores the operation status. R/W 1 80h
03h CLEAR_FAULTS Clears the status registers and re-arms the black box registers Send 0
for updating. Byte
19h CAPABILITY Retrieves the device capability. R 1 B0h
43h VOUT_UV_WARN_LIMIT Retrieves or stores output under-voltage warn limit threshold. R/W 2 0000h
4Fh OT_FAULT_LIMIT Retrieves or stores over-temperature fault limit threshold. R/W 2 0FFFh
(256°C)
51h OT_WARN_LIMIT Retrieves or stores over-temperature warn limit threshold. R/W 2 0FFFh
(256°C)
57h VIN_OV_WARN_LIMIT Retrieves or stores input over-voltage warn limit threshold. R/W 2 0FFFh
58h VIN_UV_WARN_LIMIT Retrieves or stores input under-voltage warn limit threshold. R/W 2 0000h
5Dh IIN_OC_WARN_LIMIT Retrieves or stores input current warn limit threshold (mirror at R/W 2 0FFFh
D3h)
78h STATUS_BYTE Retrieves information about the part operating status. R 1 01h
79h STATUS_WORD Retrieves information about the part operating status. R 2 0801h
7Ah STATUS_VOUT Retrieves information about output voltage status. R 1 00h
7Ch STATUS_INPUT Retrieves information about input status. R 1 10h
7Dh STATUS_TEMPERATURE Retrieves information about temperature status. R 1 00h
7Eh STATUS_CML Retrieves information about communications status. R 1 00h
7Fh STATUS_OTHER Retrieves other status information R 1 00h
80h STATUS_MFR_SPECIFIC Retrieves information about circuit breaker and MOSFET R 1 10h
shorted status.
86h READ_EIN Retrieves energy meter measurement. R 6 00h 00h
00h 00h
00h 00h
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