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CAR1248TNBCXZ01A Arkusz danych(PDF) 5 Page - Lineage Power Corporation |
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CAR1248TNBCXZ01A Arkusz danych(HTML) 5 Page - Lineage Power Corporation |
5 / 8 page GE CAR1248TN series rectifier Input: 90Vac to 264Vac; Output: -54Vdc @ 1200W November 20, 2012 ©2012 General Electric Company. All rights reserved. Page 5 Serial Bus Communications – CAR1248TN The I²C interface facilitates the monitoring and control of various operating parameters within the unit and transmits these on demand over an industry standard I²C Serial bus. All signals are referenced to ‘Signal Return’. Device addressing: The microcontroller (MCU) and the EEPROM have the following addresses: Device Address Bit Assignments (Most to Least Significant) MCU 1 0 1 1 A2 A1 A0 R/W EEPROM 1 0 1 0 A2 A1 A0 R/W Address lines (A2, A1, A0): Up to eight (8) modules to be addressed on a single I²C bus. The pins are pulled HI internal to the power supply. For a logic LO connect to ‘Output Return’ Serial Clock (SCL): Host generated, this signal needs to be pulled up externally ensuring that rise and fall time timing and the maximum sink current is in compliance to the I²C specification. Serial Data (SDA): This is a bi-directional line that needs to be pulled up externally ensuring that rise and fall time timing and the maximum sink current is in compliance to the I²C specification. Command code: All registers are 16 bits, written as LSB followed by MSB. All A/D’s are 10 bit (1024 steps). All constants can be fine-tuned to compensate for manufacturing tolerances; Name CMD Access Default /Name Bits Constant Vout 00 R -54 0.102 Iout 01 R - 0.042 Temperature 02 R - 0.005 ON/OFF 03 R/W 1 – OFF, 0 – ON Ilimit 04 R/W 25 0.042 Vset 05 R/W -54 0.094 Vprog 06 R Vout= 20 x Vprog OT trip 07 R/W 120 0.005 OT recover 08 R/W 110 0.005 DC_OK_HI 09 R/W 55.6 0.102 DC_OK_LO 0A R/W 52.4 0.102 STATUS 0B R Input 0 1-LL AC_OK 1 1-normal DC_OK 2 OT 3 Fault 4 Intrpt 5 OV 6 DC_INT 7 Firmware 0C R EEPROM 0D- 7C R/W Vout [00]: Output voltage read back, returns the voltage on the anode side of the or’ing function, data LSB followed by MSB. The default value is -54Vdc Example; readback 0211h, convert into its decimal equivalent and then multiply by the constant, Vout = 529 x 0.102 = 54Vdc Iout [01]: Output current read back, data LSB followed by MSB. Example; readback 021Fh, convert into its decimal equivalent and multiply by the constant, Iout=543 x 0.042 = 22.8A Temperature [02]: Temperature read back, data LSB followed by MSB. Example; readback 037Bh, convert into its decimal equivalent and multiply by the constant, temp = 891 x 0.005 = 4.36. In the table below this corresponds to 25C Data Temp C Data Temp C Data Temp C 4.83 -5 3.71 45 1.7 95 4.78 0 3.51 50 1.54 100 4.72 5 3.3 55 1.4 105 4.65 10 3.09 60 1.26 110 4.56 15 2.88 65 1.14 115 4.46 20 2.67 70 1.03 120 4.35 25 2.46 75 0.93 125 4.21 30 2.25 80 0.84 130 4.06 35 2.06 85 3.89 40 1.88 90 ON/OFF [03]: A logic ‘1’ turns OFF the -54V output of the power supply. Ilim [04]: This feature lowers the current limit from the default values of 0253h (595), corresponding to 25A at high line and 01EFh (495) corresponding to 20.8A at low line. The delivered output current cannot exceed the maximum power capacity of the unit. At high line the power supply is limited to 1200W, thus, at -48Vdc the output current is limited to 25A. Example: At high line, reduce the current limit to 20A. Compute the data to be sent to the controller; 20 / 0.042 = 476. The hex equivalent of this decimal data is 01DCh. The data should be sent across the bus as LSB [DC] followed by MSB [01]. Vset [05]: Changes the output voltage via i2c, if the Vprog hardware signal is > 4Vdc. If the Vprog pin voltage level is < 4Vdc, this command is ignored. The output voltage setting must be between -42 – -58Vdc. The default value is 023Eh, corresponding to -54Vdc. Example; set the output to 48Vdc. Compute the data to be sent to the controller; 48 / 0.094 = 510. The hex equivalent of this decimal data is 01FEh. The data should be sent across the bus as LSB [FE] followed by MSB [01]. |
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