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CAR0812DCBX5Z01A 데이터시트(PDF) 11 Page - Lineage Power Corporation |
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CAR0812DCBX5Z01A 데이터시트(HTML) 11 Page - Lineage Power Corporation |
11 / 16 page GE Data Sheet CAR0812DC Series DC-DC Converter Input: -36VDC to -75VDC; Output: +12 VDC @ 850W; 3.3VDC or 5 VDC @ 1A April 23, 2013 ©2013 General Electric Company. All rights reserved. Page 11 processors to update their data base so that successive reads provide fresh data. PMBusTM Commands Standard instruction: Up to two bytes of data may follow an instruction depending on the required data content. Analog data is always transmitted as LSB followed by MSB. PEC is optional and includes the address and data fields. 1 8 1 8 1 S Slave address Wr A Command Code A 8 1 8 1 8 1 1 Low data byte A High data byte A PEC A P Master to Slave Slave to Master SMBUS annotations; S – Start , Wr – Write, Sr – re-Start, Rd – Read, A – Acknowledge, NA – not-acknowledged, P – Stop Standard READ: Up to two bytes of data may follow a READ request depending on the required data content. Analog data is always transmitted as LSB followed by MSB. PEC is mandatory and includes the address and data fields . PEC is optional and includes the address and data fields. 1 7 1 1 8 1 S Slave address Wr A Command Code A 1 7 1 1 8 1 Sr Slave Address Rd A LSB A 8 1 8 1 1 MSB A PEC No-ack P Block instruction: When writing or reading more than two bytes of data at a time BLOCK instructions for WRITE and READ commands must be used instead of the Standard Instructions. Block write format: 1 7 1 1 8 1 S Slave address Wr A Command Code A 8 1 8 1 8 1 Byte count = N A Data 1 A Data 2 A 8 1 8 1 8 1 1 ………. A Data 48 A PEC A P Block read format: 1 7 1 1 8 1 S Slave address Wr A Command Code A 1 7 1 1 Sr Slave Address Rd A 8 1 8 1 8 1 Byte count = N A Data 1 A Data 2 A 8 1 8 1 8 1 1 ………. A Data 48 A PEC NoAck P Linear Data Format The definition is identical to Part II of the PMBus Specification. All standard PMBus values, with the exception of output voltage related functions, are represented by the linear format described below. Output voltage functions are represented by a 16 bit mantissa. Output voltage has a E=9 constant exponent. 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 or scaling factor, its format is shown below. Data Byte High Data Byte Low Bit 7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0 Exponent (E) Mantissa (M) The relationship between the Mantissa, Exponent, and Actual Value (V) is given by the following equation: E M V 2 Where: V is the value M is the 11-bit, two’s complement mantissa E is the 5-bit, two’s complement exponent PMBusTM Command set: Command Hex Code Data Byte Function Operation 01 1 Output ON/OFF ON_OFF_config 02 1 09, output ON default Clear_faults 03 0 Clear Status Write_protect 10 1 Write control Store_default_all 11 0 Store permanently Restore_default_all 12 0 Reset defaults Capability 19 1 30h, 400kHz, SMBAlert Vout_mode 20 1 Vout constants Vout_command 21 2 Set Vout Vout_OV_fault_limit 40 2 Set OV fault limit Vout_OV_fault_response 41 1 Vout_OV_warn_limit 42 2 Set OV warn limit Vout_UV_warn_limit 43 2 Set UV warn limit Vout_UV_fault_limit 44 2 Vout_UV_fault_response 45 1 Iout_OC_fault_limit 46 2 Iout_OC_fault_response 47 1 Latch or hiccup Iout_OC_warn_limit 4A 2 Set OC warn limit OT_fault_limit 4F 2 OT_fault_response 50 1 Latch or hiccup OT_warn_limit 51 2 Set OT warn limit UT_warn_limit 52 2 UT_fault_limit 53 2 UT_fault_response 54 1 Vin_OV_fault_limit 55 2 Vin_OV_warn_limit 57 2 Set OV warn limit Vin_UV_warn_limit 58 2 Set UV warn limit Vin_UV_fault_limit 59 2 Set UV shutdown Status_byte 78 1 Status_word 79 2 Status_Vout 7A 1 Status_Iout 7B 1 Status_input 7C 1 Status_temperature 7D 1 |
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