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CAR2012TE 数据表(PDF) 7 Page - Lineage Power Corporation |
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CAR2012TE 数据表(HTML) 7 Page - Lineage Power Corporation |
7 / 20 page GE Data Sheet CAR2012TE series rectifier Input: 85Vac to 264Vac; Output: 12 Vdc @ 2000W; 3.3Vdc or 5 Vdc @ 4A February 9, 2014 ©2013 General Electric Company. All rights reserved. Page 7 Control and Status Control hierarchy: Some features, such as output voltage, can be controlled both through hardware and firmware. For example, the output voltage is controlled both by a signal pin (Vprog) and a PMBus command, (OPERATION) . Unless otherwise noted, the signal pin controls the feature until the firmware command is executed. However, once the firmware command has been executed, the signal pin is ignored. In the above example, the power supply will no longer ‘listen’ to the Vprog pin if the OPERATION command has been executed. In summary, Vprog is utilized for initialized configuration of the output voltage and to change the output voltage when PMBus is not used for that function. Analog controls: Details of analog controls are provided in this data sheet under Signal Definitions. Common ground: All signals and outputs are referenced to Output return. These include ‘Vstb return’ and ‘Signal return’. Delayed overcurrent shutdown during startup: Power supplies are programmed to stay in a constant current state for up to 20 seconds during power up. This delay has been introduced to permit the orderly application of input power to a subset of paralleled front-ends during power up. If the overload persists beyond the 20 second delay, the front-end will revert back into its programmed state of overload protection. Unit in Power Limit or in Current Limit: When output voltage is > 10VDC the Output LED will continue blinking. When output voltage is < 10VDC, if the unit is in the RESTART mode, it goes into hiccup. When the unit is ON the output LED is ON, when the unit is OFF the output LED is OFF. When the unit is in latched shutdown the output LED is OFF. Auto_restart: Auto-restart is the default configuration for over-current and over-temperature shutdowns. These features are configured by the PMBus™ fault_response commands An overvoltage shutdown is followed by three attempted restarts, each restart delayed 1 second, within a 1 minute window. If within the 1 minute window three attempted restarts failed, the unit will latch OFF. If within the 1 minute less than 3 shutdowns occurred then the count for latch OFF resets and the 1 minute window starts all over again. Restart after a latchoff: PMBus™ fault_response commands can be configured to direct the power supply to remain latched off for over_temperature and over_current. To restart after a latch off either of five restart mechanisms are available. 1. The hardware pin Remote ON/OFF may be cycled OFF and then ON. 2. The unit may be commanded to restart via i2c through the Operation command by cycling the output OFF followed by ON. 3. Remove and reinsert the unit. 4. Turn OFF and then turn ON AC power to the unit. 5. Changing firmware from latch off to restart. Each of these commands must keep the power supply in the OFF state for at least 2 seconds, with the exception of changing to restart. A successful restart shall clear all alarm registers, set the restarted successful bit of the Status_2 register. A power system that is comprised of a number of power supplies could have difficulty restarting after a shutdown event because of the non-synchronized behavior of the individual power supplies. Implementing the latch-off mechanism permits a synchronized restart that guarantees the simultaneous restart of the entire system. A synchronous restart can be implemented by; 1. Issuing a GLOBAL OFF and then ON command to all power supplies, 2. Toggling Off and then ON the ENABLE signal 3. Removing and reapplying input commercial power to the entire system. The power supplies should be turned OFF for at least 20 – 30 seconds in order to discharge all internal bias supplies and reset the soft start circuitry of the individual power supplies. Control Signals MCU Device address: Address bits A2, A1, A0 configure the specific address of the power supply. With these four bits, up to sixteen (8) modules to be addressed on a single I²C bus. The pins are pulled HI internal to the power supply. For a logic LO these pins should be connected to ‘Output Return’. The least significant bit x (LSB) of the address byte is set to either write [0] or read [1]. A write command instructs the power supply. A read command accesses information from the power supply. Device Address Address Bit Assignments (Most to Least Significant) MCU Cx 1 1 0 0 A2 A1 A0 R/W Broadcast 00 0 0 0 0 0 0 0 0 Global Broadcast: This is a powerful command because it instruct all power supplies to respond simultaneously.. A read instruction should never be accessed globally. The power supply should issue a ‘invalid command’ state if a ‘read’ is attempted globally. For example, changing the ‘system’ output voltage requires this capability so that all paralleled power supplies change their output simultaneously. This command can also turn OFF the ‘main’ output or turn ON the ‘main’ output of all power supplies simultaneously. Unfortunately, this command does have a side effect. Only a single power supply needs to pull down the ninth acknowledge bit. To be certain that each power supply responded to the global instruction, a READ |
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