 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
OKDY-T Datasheet(PDF) 32 Page - Murata Power Solutions Inc. |
|
||||||||||||||||||||||||||||||
OKDY-T Datasheet(HTML) 32 Page - Murata Power Solutions Inc. |
|
|
32 / 41 page  The Snapshot feature enables the user to read the parameters via the PMBus interface during normal operation, although it should be noted that reading the 22 bytes will occupy the bus for some time. The Snapshot enables the user to store the snapshot parameters to Flash memory in response to a pending fault as well as to read the stored data from Flash memory after a fault has occurred. Automatic store to Flash memory following a fault is triggered when any fault threshold level is exceeded, provided that the specific fault response is to shut down. Writing to Flash memory is not allowed if the device is configured to restart following the specific fault condition. It should also be noted that the device supply voltage must be maintained during the time the device is writing data to Flash memory; a process that requires between 700-1400 μs depending on whether the data is set up for a block write. Undesirable results may be observed if the input voltage of the product drops below 3.0 V during this process. Non-Volatile Memory (NVM) The product incorporates two Non-Volatile Memory areas for storage of the supported PMBus commands; the Default NVM and the User NVM. The Default NVM is pre-loaded with Murata factory default values. The Default NVM is write-protected and can be used to restore the Murata factory default values through the command RESTORE_DEFAULT_ALL. The User NVM is pre-loaded with Murata factory default values. The User NVM is writable and open for customization. The values in NVM are loaded into operational RAM during initialization according to sec- tion “Initialization Procedure”, where after commands can be changed through the PMBus Interface. The STORE_USER_ALL command will store the changed parameters to the User NVM. Software tools for design and production Murata provides software tools for configuration and monitoring of this product via the PMBus interface. For more information please contact your local Murata sales representative. PMBus addressing The PMBus address should be configured with resistors connected between the SA0/SA1 pins and the PREF pin, as shown in the PMBus interface This product provides a PMBus digital interface that enables the user to configure many aspects of the device operation as well as to moni- tor the input and output voltages, output current and device tem- perature. The product can be used with any standard two-wire I2C or SMBus host device. In addition, the product is compatible with PMBus version 1.1 and includes an SALERT line to help mitigate bandwidth limitations related to continuous fault monitoring. The product sup- ports 100 kHz bus clock frequency only. The PMBus signals, SCL, SDA and SALERT require passive pull-up resistors as stated in the SMBus Specification. Pull-up resistors are required to guarantee the rise time as follows: Eq. 6. = R p Cp ≤ 1μs, where Rp is the pull-up resistor value and Cp is the bus loading, the maximum allowed bus load is 400 pF. The pull-up resistor should be tied to an external supply voltage in range from 2.7 to 5.5 V, which should be present prior to or during power-up. If the proper power supply is not available, voltage dividers may be applied. Note that in this case, the resistance in the equation above corresponds to parallel connection of the resistors forming the voltage divider. Monitoring via PMBus It is possible to monitor a wide variety of parameters through the PMBus interface. Fault conditions can be monitored using the SALERT pin, which will be asserted when any number of pre-configured fault or warning conditions occurs. It is also possible to continuously moni- tor one or more of the power conversion parameters including but not limited to the following: Input voltage (READ_VIN) Output voltage (READ_VOUT) Output current (READ_IOUT) Internal junction temperature (READ_TEMPERATURE_1) Switching frequency (READ_FREQUENCY) Duty cycle (READ_DUTY_CYCLE) In the default configuration monitoring is enabled also when the output voltage is disabled. This can be changed in order to reduce standby power consumption. Snap shot parameter capture This product offers a special feature that enables the user to capture parametric data during normal operation or following a fault. The fol- lowing parameters are stored: Input voltage Output voltage Output current Internal junction temperature Switching frequency Duty cycle Status registers User NVM Factory default Customizable RAM RESTORE_DEFAULT_ALL Default NVM Factory default Write-protected READ WRITE PMBus interface STORE_USER_ALL INITIALIZATION INITIALIZATION RESTORE USER ALL OKDx-T/50-W12-C 50A Digital PoL DC-DC Converter Series MDC_OKDx-T/50-W12-C.A04 Page 32 of 41 www.murata-ps.com/support |
Similar Part No. - OKDY-T |
|
Similar Description - OKDY-T |
|
|
Link URL |
| Privacy Policy |
| ALLDATASHEET.COM |
| Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Datasheet Upload | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
| Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
|
Family Site : ic2ic.com |
icmetro.com |
English ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
