DRQ-12-42-D48 Datasheet, PDF (16/24 Pages) Murata Power Solutions Inc. – 500W Digital Fully Regulated Intermediate DC-DC Bus Converter

PMBus Addressing
Figure 2 and the accompanying table display the recommended resistor values
for hard-wiring PMBus addresses (1% tolerance resistors recommended): The
address is set in the form of two octal (0 to 7) digits, with each pin setting one
digit. The resistor values for each digit is shown below.
The SA0 and SA1 pins can be configured with a resistor to GND according to
the following equation.
PMBus Address = 8 x (SA0value) + (SA1 value)
If the calculated PMBus address is 0d, 11d or 12d, PMBus address 119d is
assigned instead. From a system point of view, the user shall also be aware of
further limitations of the addresses as stated in the PMBus Specification. It is
not recommended to keep the SA0 and SA1 pins left open.
PMBus Commands
The products are designed to be PMBus compliant. The following tables list
the implemented PMBus read commands. For more detailed information see
“PMBus Power System Management Protocol Specification, Part I – General
Requirements, Transport and Electrical Interface” and “PMBus Power System
Management Protocol, Part II – Command Language.”
DRQ-12/42-D48 Series
500W Digital Fully Regulated
Intermediate DC-DC Bus Converter
SA0
SA1
R1
R0
Figure 2. Schematic of Connection of Address Resistors
Digit (SA0, SA1 index)
0
1
2
3
4
5
6
7
Resistor Value [kΩ]
10
22
33
47
68
100
150
220
OVERALL
CMD
Command Name¹
01h OPERATION²
02h ON_OFF_CONFIG³
03h CLEAR_FAULTS
10h WRITE_PROTECT
11h STORE_DEFAULT_ALL⁴
12h RESTORE_DEFAULT_ALL⁴
15h STORE_USER_ALL⁴
16h RESTORE_USER_ALL⁴
19h CAPABILITY
20h VOUT_MODE
21h VOUT_COMMAND
22h VOUT_TRIM
25h VOUT_MARGIN_HIGH
26h VOUT_MARGIN_LOW
40h VOUT_OV_FAULT_LIMIT
41h VOUT_OV_FAULT_RESPONSE⁵
42h VOUT_OV_WARN_LIMIT
46h IOUT_OC_FAULT_LIMIT
47h IOUT_OC_FAULT_RESPONSE⁶
4Ah IOUT_OC_WARN_LIMIT
4Fh OT_FAULT_LIMIT
50h OT_FAULT_RESPONSE⁵
51h OT_WARN_LIMIT
58h VIN_UV_WARN_LIMIT
59h VIN_UV_FAULT_LIMIT
5Ah VIN_UV_FAULT_RESPONSE⁷
5Eh POWER_GOOD_ON
5Fh POWER_GOOD_OFF
60h TON_DELAY
61h TON_RISE¹³
SMBus
Transaction Type:
Writing Data
SMBus
Number
Transaction Type: Of Data
Reading Data Bytes
Default Value
Lower Upper
Limit Limit
Cross Check
Unit
Write Byte
Write Byte
Send byte
Write Byte
Send byte
Send byte
Send byte
Send byte
N/A
N/A
Write Word
Write Word
Write Word
Write Word
Write Word
Write Byte
Write Word
Write Word
Write Byte
Write Word
Write Word
Write Byte
Write Word
Write Word
Write Word
Write Byte
Write Word
Write Word
Write Word
Write Word
Read Byte
1
0x80
Read Byte
1
0x1D
N/A
0
N/A
Read Byte
1
0x00
N/A
0
N/A
N/A
0
N/A
N/A
0
N/A
N/A
0
N/A
Read Byte
1
0xB0
Read Byte
1
0x17
Read Word
2
11.500
8.100 13.200
V
Read Word
2
0
8.1<=Vout<=13.212
V
Read Word
2
13.199
8.100 13.199 >VOUT_MARGIN_LOW
V
Read Word
2
8.100
8.100 13.200 <VOUT_MARGIN_HIGH
V
Read Word
2
14.199
8.100 15.600 >VOUT_OV_WARN_LIMIT
V
Read Byte
1
0xB8
Read Word
2
13.500
8.100 15.600
<VOUT_OV_FAULT_LIMIT
>VOUT_COMMAND
V
Read Word
2
54.00
0.00 60.00 >IOUT_OC_WARN_LIMIT
A
Read Byte
1
0xF8
Read Word
2
52.00
0.00 60.00 <IOUT_OC_FAULT_LIMIT
A
Read Word
2
132
30 145
>OT_WARN_LIMIT
°C
Read Byte
1
0xB8
Read Word
2
115
30 145
<OT_FAULT_LIMIT
°C
Read Word
2
37.00
32.00 75.00
<VIN_OV_WARN_LIMIT
>VIN_UV_FAULT_LIMIT
V
Read Word
2
35.50
32.00 75.00 <VIN_UV_WARN_LIMIT
V
Read Byte
1
0xF8
Read Word
2
10.799
1.000 13.199 >POWER_GOOD_OFF
V
Read Word
2
9.600
1.000 13.199 <POWER_GOOD_ON
V
Read Word
2
1
1 500
ms
Read Word
2
0
10 100
ms
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MDC_DRQ-12/42-D48.A03 Page 16 of 24