DRQ-12-42-D48 Datasheet, PDF (18/24 Pages) Murata Power Solutions Inc. – 500W Digital Fully Regulated Intermediate DC-DC Bus Converter

OVERALL (CONT.)
Notes:
* Only available in supervisor mode (default state is user mode, send password to comand 0xFC to
change to supervisor mode)
1. a) Unit restores the entire contents of the non-volatile User Store memory when power up
b) PEC is supported
c) Max bus speed: 400kHZ
d) SMBALERT# is supported
e) Linear data format used
f) addressing: If the calculated PMBus address is 0d, 11d or 12d, SA0 or SA1 lefts open, default
PMBus address 120d is assigned instead.
2. Not supported items:
100101XXb Margin Low(Ignore Fault),
101001XXb On Margin High(Ignore Fault)
3. Restart delay of turned off by OPEATION or CONTROL or primary on/off is 200ms
4. Unit will shutdown 1 second for protection, then recover automaticly
5. Restart delay unit: 500ms, lower limit: 500ms.
Turn off delay unit: 0ms, lower limit: 0ms
if bits 7:6=11b, restart delay is 500ms
DRQ-12/42-D48 Series
500W Digital Fully Regulated
Intermediate DC-DC Bus Converter
6. Restart delay unit and Turn off delay unit are same as note 5
Bits 7:6: 00b,01b,10b are not supported
7. Restart delay unit: 100ms, lower limit: 100ms.
Turn off delay unit:0ms, lower limit: 0ms
if bits 7:6=11b, restart delay is 100ms
8. Temperature of baseplate side
9. Temperature of pin side
10. Unit’s actual inforamtion
11. Default value of negative logic: 0x04
Default value of positive logic: 0x06
12. Unit can receive any value for VOUT_TRIM command, but Vout is limited to 8.1~13.2V, if calculated
Vout exceeds limit, then equal to limit.
13. Value of 0 is acceptable, which is the same as lower limit to unit.
MURATA-PS defined commands (01-CFh Refer to PMBus 1.2 SPEC)
D0h: MFR_VARIABLE_FREQUENCY_DISABLE
Bits Purpose
Value
Meaning
7:1
0000000 Reserved
0
Variable frequency
control
0 Turn on variable frequency control
1 Turn off variable frequency control
DDh: MFR_PRIMARY_ON_OFF_CONFIG
Bits Purpose
Value
Meaning
7:3
00000 Reserved
Controls how the
0 Unit ignores the primary ON/OFF pin
2 unit responds to the
CONTROL pin
1
Unit requires the primary ON/OFF pin to be
asserted to start the unit
1
Polarity of primary
ON/OFF logic
0 Active low (Pull pin low to start the unit)
1 Active high (Pull high or open to start the unit)
0
0 Reserved
DEh: MFR_ PGOOD_POLARITY
Bits Purpose
Value
Meaning
7:1
0000000 Reserved
0
Power good polarity
of pin 12
0
Negative logic, output low if Vout rises to
specific value
1
Positive logic, output high if Vout rises to
specific value
E9h: MFR_VIN_UV_FAULT_HYS
Hysteresis of VIN_UV_FAULT recover, Linear data format
EAh: MFR_OT_FAULT_HYS
Hysteresis of OT_FAULT recover, Linear data format
F6h: MFR_CALIBRATION_STATUS
Refer to calibration procedure file
F9h: MFR_VIN_SENSE_CALIBRATION
Refer to calibration procedure file
FAh: MFR_IOUT_SENSE_CALIBRATION
Refer to calibration procedure file
FBh: MFR_VOUT_SET_POINT_CALIBRATION
Refer to calibration procedure file
FCh: MFR_SUPERVISOR_PASSWORD
Set unit to supervisor mode or ROM mode, Refer to password table
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MDC_DRQ-12/42-D48.A03 Page 18 of 24