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參數(shù)資料
| 型號(hào)： | PDT006A0X43-SRZ |
| 廠商： | LINEAGE POWER LLC |
| 元件分類： | 電源模塊 |
| 英文描述： | DC-DC REG PWR SUPPLY MODULE |
| 封裝： | ROHS COMPLIANT PACKAGE-9 |
| 文件頁(yè)數(shù)： | 10/38頁(yè) |
| 文件大?。?/td> | 760K |
| 代理商： | PDT006A0X43-SRZ |
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Preliminary Data Sheet
June 13, 2011
6A Digital Pico DLynxTM: Non-isolated DC-DC Power Modules
3 – 14.4Vdc input; 0.45Vdc to 5.5Vdc output; 6A output current
LINEAGE POWER
18
Digital Feature Descriptions
PMBus Interface Capability
The 6A Digital Pico DLynx
TM power modules have a
PMBus interface that supports both communication and
control. The PMBus Power Management Protocol
Specification can be obtained from www.pmbus.org. The
modules support a subset of version 1.1 of the
specification (see Table 6 for a list of the specific
commands supported). Most module parameters can be
programmed using PMBus and stored as defaults for
later use.
All communication over the module PMBus interface
must support the Packet Error Checking (PEC) scheme.
The PMBus master must generate the correct PEC byte
for all transactions, and check the PEC byte returned by
the module.
The module also supports the SMBALERT response
protocol whereby the module can alert the bus master if
it wants to talk. For more information on the SMBus alert
response protocol, see the System Management Bus
(SMBus) specification.
The module has non-volatile memory that is used to
store configuration settings. Not all settings programmed
into the device are automatically saved into this non-
volatile memory, only those specifically identified as
capable of being stored can be saved (see Table 6 for
which command parameters can be saved to non-
volatile storage).
PMBus Data Format
For commands that set thresholds, voltages or report
such quantities, the module supports the “Linear” data
format among the three data formats supported by
PMBus. The Linear Data Format is a two byte value with
an 11-bit, two’s complement mantissa and a 5-bit, two’s
complement exponent. The format of the two data bytes
is shown below:
Data Byte High
7 6 5 4 3
2 1 0 7 6 5 4 3 2 1 0
Data Byte Low
Exponent
MSB
Mantissa
MSB
The value is of the number is then given by
Value = Mantissa x 2
Exponent
PMBus Addressing
The power module can be addressed through the
PMBus using a device address. The module has 64
possible addresses (0 to 63 in decimal) which can be set
using resistors connected from the ADDR0 and ADDR1
pins to SIG_GND. Note that some of these addresses
(0, 1, 2, 3, 4, 5, 6, 7, 8, 12, 40 in decimal) are reserved
according to the SMBus specifications and may not be
useable. The address is set in the form of two octal (0 to
7) digits, with each pin setting one digit. The ADDR1 pin
sets the high order digit and ADDR0 sets the low order
digit. The resistor values suggested for each digit are
shown in Table 4 (1% tolerance resistors are
recommended). Note that if either address resistor value
is outside the range specified in Table 4, the module will
respond to address 127.
Table 4
Digit
Resistor Value (K)
0
10
1
15.4
2
23.7
3
36.5
4
54.9
5
84.5
6
130
7
200
The user must know which I
2C addresses are reserved
in a system for special functions and set the address of
the module to avoid interfering with other system
operations. Both 100kHz and 400kHz bus speeds are
supported by the module. Connection for the PMBus
interface should follow the High Power DC specifications
given in section 3.1.3 in the SMBus specification V2.0
for the 400kHz bus speed or the Low Power DC
specifications in section 3.1.2. The complete SMBus
specification is available from the SMBus web site,
smbus.org.
ADDR0
SIG_GND
RADDR0
RADDR1
ADDR1
Figure 48. Circuit showing connection of resistors
used to set the PMBus address of the module.
PMBus Enabled On/Off
The module can also be turned on and off via the
PMBus interface. The OPERATION command is used to
actually turn the module on and off via the PMBus, while
the ON_OFF_CONFIG command configures the
combination of analog ON/OFF pin input and PMBus
commands needed to turn the module on and off. Bit [7]
in the OPERATION command data byte enables the
module, with the following functions:
0
:
Output is disabled
1
:
Output is enabled
This module uses the lower five bits of the
ON_OFF_CONFIG data byte to set various ON/OFF
options as follows:
Bit Position
4
3
2
1
0
Access
r/w
r
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