SPDMXD28 Cobra Series Cobra Series Programmable Multi-Channel Amp

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SPDMXD28 Cobra Series Cobra Series Programmable Multi-Channel Amp

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Datasheet 5038,
SPDMXD28 Cobra Series
Cobra Series Programmable Multi-Channel Amp-150 Solid State Power Controllers, SPDMXD28 Series
Cobra Series Programmable Multi-Channel Solid State Power Controllers six-channel, microcontroller based, Solid State module designed used aircraft vehicle applications. Each channel Cobra series programmed rated current over 25-to-1 range support channel currents from 1-25 amps. Channels programmed operate parallel single channel with higher current capabilities. channels paralleled maximum amps. Cobra intended used where multiple Solid State Power Controller channels need co-located same card power distribution box. These modules have integrated current sensing with derating over full operating temperature range communicate with system controller over RS232, RS-422, RS-485 serial bus. MIL-STD-1275B, Notice1 April 2004 MIL-STD-704F March 2004 MIL-STD-217F, Notice 1995
Description:
Compliant Documents Standards:
Characteristics Volt Electrical Systems Military Vehicles
Aircraft Electrical Power Characteristics Reliability Prediction Electronic Equipment
Features:
channels, used individually parallel combinations Programmable from Amps rated current Parallel channel capability amps RS-232, RS-422, RS-485 serial interface BATTLESHORT setting prevent tripping extreme circumstances MAINTENANCE MODE safe maintenance Power-up continuous each channel entire module Non-volatile storage programmed parameters 28VDC Input: Current Rating with Very Drop; 50mV, typ. True Protection from 130% 1000% with Nuisance Trip Suppression Instant Trip Protection µsec typ) Loads Above 1000% Unlimited Interrupt Capability; Repetitive Fault Handling Capability Thermal Memory Internally Generated Isolated Supply Drive Switch High Control Circuit Isolation: 750V Control Power Circuit Soft Turn-On Reduce Issues Tolerant tolerant inputs Trip Reset Circuit Trip-Free Optically Isolated, Input Outputs operating temperature range heat sinking required
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Datasheet 5038,
SPDMXD28 Cobra Series
Figure Block Diagram
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Datasheet 5038, Connector Descriptions DSUB, Male Pins): Bias 5VDC VBIAS Return reference I/O. VBIAS 5VDC +10% Bias Supply.
SPDMXD28 Cobra Series
MAINTENANCE MODE MAINTENANCE MODE control. Logic high input engages MAINTENANCE MODE. Logic disengages MAINTENANCE MODE. BATTLESHORT BATTLESHORT Mode control. Mode. Logic disengages BATTLESHORT Mode. Logic high input engages BATTLESHORT
BIT* Built Test. Output logic indicates Built Test failure. RS-232 input Cobra Series with RS-232 serial interface. Used along with (pin RS-422 RS-485 differential inputs Cobra Series with RS-422/RS-485 serial interface. Used along with (pin differential Cobra Series with serial interface. description above Used along with (pin RS-422 RS-485 differential outputs Cobra Series with RS422/RS-485 serial interface. description above Also RS-232 output Cobra Series with RS-232 serial interface.
Power Connector Descriptions (Positronic MIP30M400A1, Male Pins): LINE Pins 28VDC Power Input. Rated continuous current capability: Amps Cobra Series with channels, Amps channels, Amps channels. Power Return; Reference point controlling rise/fall times. Connect 28VDC return. Caution Note that column pins that pins LINE. Also, left floating; must connected return LINE. Load Pins Connect load channel here. Load Pins Connect load channel here. Load Pins Connect load channel here. Load Pins Connect load channel here. Load Pins Connect load channel here Cobra Series with channels. Load Pins Connect load channel here Cobra Series with channels.
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Datasheet 5038,
SPDMXD28 Cobra Series
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Datasheet 5038,
SPDMXD28 Cobra Series
Figure Outline, Open Package West Industry Court Deer Park, 11729-4681 Phone (631) 7600 (631) 9798 World Wide http://www.sensitron.com E-Mail Address sales@sensitron.com
SPDMXD28 Cobra Series
Datasheet 5038, Serial Command serial consists 4-byte initiated system controller. system controller first sends unique command Cobra Series, Cobra Series then responds with unique character. Then system controller sends second byte Cobra Series responds with second byte. commands, first byte sent system controller Cobra Series cleared; second byte from system controller set. This protocol allows sufficient error checking provide robust communications minimum overhead. ON/OFF, Program Current Rating Parallel Combinations, system controller's second byte contains information telling Cobra Series what other commands, except BATTLESHORT commands, request information from Cobra Series system controller's second byte another unique byte Cobra Series responds with requested information. BATTLESHORT Commands, information contained bytes unique bytes used. Normal Mode commands accepted when MAINTENANCE MODE logic low. MAINTENANCE MODE commands accepted when MAINTENANCE MODE logic high. Normal Mode commands understood when MAINTENANCE MODE logic high MAINTENANCE MODE commands understood when MAINTENANCE MODE logic low. Commands understood responded Cobra Series with byte representing character "E". Cobra Series expect that four-byte sequence will start after responds with "E". following descriptions commands, trailing means hexadecimal number trailing means binary number. Normal Mode Commands ON/OFF Turns channels off. Protocol: System Controller sends (4Fh) Cobra Series sends (51h) System Controller sends 10XX XXXXb Cobra Series sends 00XX XXXXb where each "X", LSBs, either logic high indicating that channel should respectively. position logic high indicates channel, such high LSB, position means that channel should turned logic means that channel should turned off. Load Status Asks Load Status channels. Logic means load drawing least rated current. Protocol: System Controller sends (4Ch) Cobra Series sends (4Dh) System Controller sends (4Dh 80H) Cobra Series sends XXXX XXXXb where each "X", LSBs, either logic high indicating that channel passed failed power-on test, respectively. position logic high indicates channel, such LSB, position means that channel drawing load current logic means that channel drawing load current. Master channels report Load Status entire set; slave channels Load Status meaningless.
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SPDMXD28 Cobra Series
Datasheet 5038, Trip Status Asks Trip Status channels. Logic high means that channel tripped. Trip Timings chart current trip time. Protocol: System Controller sends (54h) Cobra Series sends (55h) System Controller sends (55h 80H) Cobra Series sends 00XX XXXXb where each "X", LSBs, either logic high indicating that channel tripped tripped, respectively. position logic high indicates channel, such logic high LSB, position means that channel tripped logic means that channel tripped. Master channels report Trip Status entire set; slave channels Load Status meaningless. Channel Status Asks Status channels. Protocol: System Controller sends (42h) Cobra Series sends (44h) System Controller sends (44h 80H) Cobra Series sends X0XX XXXXb where each "X", LSBs, either logic high indicating that channel passed failed BIT, respectively. position logic high indicates channel, such logic high LSB, position means that channel failed logic means that channel passed BIT. logic high means that there more "missing" channels logic means that there "missing" channels. Missing channels described below paragraph "PowerOn Tests". Master channels report Status entire set; slave channels Load Status meaningless. Card Status Asks Status card. Protocol: System Controller sends (43h) Cobra Series sends (48h) System Controller sends (48h 80H) Cobra Series sends XXXX XXXXb where each "X", LSBs, either logic high indicating that channel drawing load current drawing load current, respectively. position logic high indicates channel. Example: logic high LSB, position means that channel failed power-on test logic means that channel passed power-on test. Power-On Test paragraph below difference between "missing" channels other channels that failed power-on test. logic high indicates that there error last attempt program EEPROM logic high indicates that attempt made parallel combinations that required more consecutive working channels than Cobra Series card. After Card status sent, BIT* high. paragraph Errors Error Recovery more information. Begin BATTLESHORT Mode Engages BATTLESHORT Mode, which prevents channel from tripping causes previously tripped channels turn back long they commanded off. Note that BATTLESHORT will also engage BATTLESHORT Mode. Protocol: System Controller sends (53h) Cobra Series sends (4Ah) System Controller sends (4Ah 80H) Cobra Series sends (4Bh)
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SPDMXD28 Cobra Series
Datasheet 5038, BATTLESHORT Mode Disengages BATTLESHORT Mode which allows channels trip. BATTLESHORT logic low, then BATTLESHORT Mode ended Cobra Series sends "Z". However, BATTLESHORT logic high, BATTLESHORT Mode command ignored Cobra Series send "X". user should either BATTLESHORT serial commands engaging disengaging BATTLESHORT Mode; methods should combined. Protocol: System Controller sends (4Eh) Cobra Series sends (52h) System Controller sends (52h 80h) Cobra Series sends (5Ah) (58h) Measured Current Asks measured current requested channel. data bits, right-justified bytes. high order bytes must requested separately. System Controller sends (41h) Cobra Series sends (57h) System Controller sends 1X00 0XXXb Cobra Series sends XXXX XXXXb where "XXX" LSBs from system controller channel number through (000b through 101b). logic high high order byte current data requested logic order byte. current data worth 2.442% rated current. This means that order byte show measured current from about 623% rated current; therefore, most cases, data from order byte will sufficient high order byte need retrieved. Protocol: Channel Current Ratings Asks current rating requested channel. Protocol: System Controller sends (77h) Cobra Series sends (61h) System Controller sends 1000 0XXXb Cobra Series sends 0000 0XXXb where "XXX" LSBs from system controller channel number through (000b through 101b) "XXX" LSBs from Cobra Series code current rating (see Table through (000b through 111). Parallel Combinations Asks parallel combinations. Protocol: System Controller sends (66h) Cobra Series sends (70h) System Controller sends (70h 80h) Cobra Series sends 0000 XXXXb where "XXXX" LSBs from Cobra Series code parallel combinations (see Table through (0001b through 1110). Module Temperature Asks module temperature. Protocol: System Controller sends (74h) Cobra Series sends (75h) System Controller sends (75h 80h) Cobra Series sends XXXX XXXXb where bits represent positive temperature, degrees offset 80h. Therefore, actual module temperature XXXX XXXXb minus 1000 0000b. temperature measured internally chip that communicates with main processor using interface. there communication problems, module sends code 0000 0000b which corresponds temperature -128C. Accuracy module temperature
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SPDMXD28 Cobra Series
Datasheet 5038, Line Voltage Asks voltage LINE with respect pin. Protocol: System Controller sends (76h) Cobra Series sends (77h) System Controller sends (77h 80h) Cobra Series sends XXXX XXXXb where bits, representing positive number, used calculate LINE voltage. Using decimal value represent bits, Value, calculation follows:
Value LINE Voltage fffffffffffffffff
Accuracy LINE voltage +0.5V.
MAINTENANCE MODE Commands Program Current Rating Programs specific channel with number which correspond following current ratings: 10,15, Amps shown Table System Controller sends (49h) Cobra Series sends (47h) System Controller sends 1XXX 0XXXb Cobra Series sends 0XXX 0XXXb where "XXX" upper nibble defines channel number allowed values though (000b though 101b) "XXX" lower nibble defines current rating programmed allowed values through (000b through 111b). Protocol: Parallel Combinations Programs specific channels parallel with number Parallel Combinations chart, Table possible combinations. System Controller sends (50h) Cobra Series sends (46h) System Controller sends 1000 XXXXb Cobra Series sends 0000 XXXXb where four LSBs define parallel combinations. Allowable values though (0001b through 1110b). number channels column Table defines number consecutive working channels Cobra Series card particular parallel combination channels. Consecutive working channels, starting from channel determined during power-on test. parallel combination requested Cobra Series card that doesn't have enough consecutive working channels, Cobra Series card automatically defaults parallel channels will Card indicate problem. LSBs CARD then used determine many channels failed power-on test. Protocol: First Time Operation Prior applying power first time, switches (jumpers) Baud Rate (see Table using Cobra Series with RS-422/RS-485 serial interface, 422-485 Select switch (jumper) appropriate position. position implements RS-422/RS-485 protocol without addresses; position implements protocol using 8-bit addresses (not implemented this time). using Cobra Series with interface (not implemented this time), 10-bit identifier using address switches (jumpers). Power then applied: 5VDC +10% VBIAS BIAS 28VDC LINE with connected return loads. 28VDC between 50VDC, worst case, between VDC, typically. VBIAS 28VDC supplied order. ensure microcontroller resets starts properly, power supply must have turn rate least 0.05V/ms. West Industry Court Deer Park, 11729-4681 Phone (631) 7600 (631) 9798 World Wide http://www.sensitron.com E-Mail Address sales@sensitron.com
SPDMXD28 Cobra Series
Datasheet 5038, factory, Cobra Series programmed channels parallel current ratings channels Amp. order program card, MAINTENANCE MODE must logic high, then commands sent from system controller Cobra Series. order commands between current rating parallel combinations doesn't matter since data written into nonvolatile memory until MAINTENANCE MODE brought logic low. Once data written memory, actual functions then programmed. MAINTENANCE MODE brought logic high safe maintenance system. Within 100ms reaching logic high, channels shut cannot turned back until MAINTENANCE MODE brought logic low. Parallel Definitions table what legal parallel combinations number channels Cobra Series programming. Selecting wrong parallel combinations will result error. Besides setting Card status, Cobra Series will default channels parallel. When setting parallel combinations, channels parallel must same current rating. user doesn't have program channels. lowest number channel parallel considered Master channel set. other channels Slave channels. Slave channels automatically same current rating Master channel only Master channel needs set. Subsequent Operation After Cobra Series been programmed above, operation simple. Commands sent turn various channels Trip, Load, Measured Current, Channel Card status obtained. Channels parallel sets turned commands Master channels. actual current each channel measured well programmed current ratings each channel parallel combinations. actual current that reported over Serial LSBs converter that measures current. 100% rated current LSBs. Since converter 10-bit converter, maximum current that reported 2,495% rated current. value Amps
Reading Channel Rating Number Channels Parallel
Therefore, example, single channel with reading reported over Serial channel rating Amps would carrying 25/41*7*1 4.27 Amps. channels parallel reported reading master channel channel rating equal Amps, parallel channels would carrying 8.54 Amps rating parallel channels would Amps. slave channel always reports current should ignored. accuracy reported current room temperature +10% over full temperature range. Cobra Series re-programmed repeating programming instructions above. Power-On Tests Upon application power, each channel tested. channel that fails test Card BIT. firmware used Cobra Series cards with channels this test will firmware know there fewer channels. channels checked consecutive order starting with channel last channel that passes test with intervening failing channels used determine valid parallel combinations shown Table
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SPDMXD28 Cobra Series
Datasheet 5038, During channel test sequence, channel that passed test follows channel that failed test, assumed that failing channel defective (Missing Channel) Channel BIT* brought low. non-volatile memory then read stored current ratings used each channel's rating stored parallel combinations set. there error last write non-volatile memory (such power failure during write), Card BIT* brought low. There sets data non-volatile memory pointer always points last good data. stored data requires parallel combinations that cannot implemented insufficient number consecutive passing channels, Card set, BIT* brought parallel combinations channels parallel. Errors Error Recovery Power Errors There possible error types result power-up testing: Missing Channel Error (MSB Channel Status) Memory Write Error (MSB Card Status). Missing Channel Error only cleared shutting down re-powering with defective channel being repaired. Memory Write Error cleared successful write non-volatile memory. Errors After Power There possible errors that occur after power-up tests complete: Error Parallel Combinations Error. errors BIT* first time they detected. error that been corrected will again BIT* occurs again. error occur channel drawing load current while that channel supposed off, either command trip. error will cleared automatically there longer cause error. Parallel Combination error occur parallel combinations being programmed require more consecutive working channels than present. Parallel Combinations error cleared programming parallel combinations appropriate number channels. When there error paralleling channels, error reported Cobra card defaults channels parallel. This default condition written non-volatile memory error hasn't been cleared writing non-error producing combination non-volatile memory, next time Cobra card powered there will error shown. MAINTENANCE MODE BATTLESHORT Pins BATTLESHORT pin, used, expected driven from TTL/CMOS compatible logic therefore de-bounced. connected switch Vbias), switch bouncing will likely cause repeated entry/exit/entry to/form BATTLESHORT Mode. BATTLESHORT sampled every 20mS this effect will last long cause tripped channels cycle ending with them used, this left open pull down resistor. MAINTENANCE MODE pin, other hand, de-bounced since it's expected that this will controlled switch Vbias). also sampled every 20mS requires successive samples logic high enter MAINTENANCE MODE. sample logic will reset counter back This also pull down resistor. MAINTENANCE MODE West Industry Court Deer Park, 11729-4681 Phone (631) 7600 (631) 9798 World Wide http://www.sensitron.com E-Mail Address sales@sensitron.com
SPDMXD28 Cobra Series
Datasheet 5038, MAINTENANCE MODE functions. allow safe maintenance system. Placing logic high MAINTENANCE MODE causes channels turn off. wayward commands from System Controller turn these channels when MAINTENANCE MODE high. MAINTENANCE MODE also allows changing current rating each channel allows setting parallel combinations. While MAINTENANCE MODE high, System Controller send many commands necessary current ratings parallel combinations. Once MAINTENANCE MODE brought back logic low, serial data received from System Controller written non-volatile memory. Each byte written take long 12mS write. There total bytes overhead plus bytes data write could take long 120mS. minimize write time, only data that's different from data already non-volatile memory written. Furthermore, data same, meaning data, then writing skipped altogether. help user know when writing complete, BIT* toggled when write starts toggled again when write complete. Serial communications inhibited during write nonvolatile memory. second toggle BIT* indicates when serial communications enabled. Paralleling Channels Each channel maximum rating Amps. higher current requirements, channels paralleled. channels parallel will have rating Amps, channels will have rating Amps, channels parallel rating Amps. channels parallel, simply channels' Load pins together program required parallel combination. Cobra Series card will automatically current rating higher number channel(s) same lowest number channel parallel set. Cobra Series will then command lowest number channel parallel channels Trip, Load statuses lowest number channel reflects statuses combined channel.
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Datasheet 5038,
SPDMXD28 Cobra Series
Table Parallel Combinations
Table Baud Rates
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Datasheet 5038,
SPDMXD28 Cobra Series
Figure Trip Time Current Percent
Rated Current (Amps)
Table Rated Current Codes
Code Programming Current Rating
000b 001b 010b 011b 100b 101b 110b 111b
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Datasheet 5038,
SPDMXD28 Cobra Series
Control Status (TTL/CMOS Compatible)
BIAS (Vcc) BIAS (Vcc) Current BIT* Output MAINTENANCE MODE BATTLESHORT Inputs (Positive-going input threshold voltage) (Negative-going input threshold voltage) Hysteresis (VT+ VT-) Reset RS-422/RS-485 Serial Voltage terminal Driver High Level Output Current, RL=3k Driver Level Output Current, RL=3k Driver Differential Output Voltage, RL=54 Ohms Receiver Positive-going diff input threshold Receiver Negative-going diff input threshold Receiver Input Current Receiver Input Current Differential Input/Output Capacitance Human body model RS-232 Driver High Level Output Voltage Driver Level Output Voltage Driver Slew Rate, RL=3k Receiver Positive-going input threshold Receiver Negative-going input threshold Receiver Input Hysteresis Receiver Input Resistance Human body model Driver Output Voltage CANH (Dominant) Driver Output Voltage CANL (Dominant) Driver Output Voltage CANH (Recessive) Driver Output Voltage CANL (Recessive) Driver Differential Output Voltage (Dominant) Driver Differential Output Voltage (Recessive) Driver Differential Output Voltage Rise/Fall Time Receiver Positive-going input threshold Receiver Negative-going input threshold Receiver Input Hysteresis Receiver Input Resistance Differential Input/Output Capacitance Human body model
5.0V Nominal, 7.0V Absolute Maximum 4.5V (RS-422/RS-485 Serial I/O) Voh=3.7V, min, Ioh=-20mA Vol=0.4V, max, Iol=20mA 2.0V, min, 3.5V, 1.2V, min, 2.3V, 0.6V, min, 1.4V, Command Serial
-7V, min; 12V, -60mA, 60mA, 1.7V, -0.02V, -0.2V, 0.05mA, typ; 0.1mA, -0.05mA, typ; -0.1mA, 22pF, +16kV,
min; 5.4V, -5V, min; -5.4V, 4V/µs, min; 30V/µs, 1.9V, typ; 2.4V, 0.8V, min; 1.4V, 0.5V, min; typ; +15kV,
2.75V, min; 3.5V, typ; 4.5V, 0.5V, min; 1.5V, min; 2.5V, typ; 1.5V, min; 2.5V, typ; 1.2V,min; typ; 3.1V, -120mV, min; 12mV, 750mV, typ; 900mV, 500mV, min; 650mV, 100mV, 40k, min; 100k, 15pF, +14kV,
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SPDMXD28 Cobra Series
Datasheet 5038, Cobra card will equipped with only serial interface, either RS-422/RS-485, RS-232 CAN.
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Datasheet 5038,
SPDMXD28 Cobra Series
Power
Input Voltage Continuous Transient Power Dissipation Single Channel Power Dissipation Channels (Each channel indicated current) Current Voltage Drop Single Channel Voltage Drop Channels (Each channel indicated current) current without tripping current guaranteed tripping Trip time Output Rise Time (turn-on) Output Fall Time under normal turn-off Output Fall Time under Fault Load Requirement
Absolute Maximum +600V -600V Spike 0.68W 25°C 2.25W 25°C 2.88W 125°C 4.5W 25°C 15.0W 25°C 19.5W 125°C Continuous Trip Curve (Figure 15A, 25A, 15A, 25A, 110% Rated Current 145% Rated Current Trip Curve (Figure µsec typ, µsec, min. µsec typ, µsec, min. µsec
Short Circuit Protection Unlimited Instant Trip 800%, min; 1200%, Does include voltage drop power dissipation mating connector VBias power dissipation. Table Electrical Characteristics Vbias 5.0V unless otherwise specified)
Protection
Physical Characteristics Temperature
Operating Temperature Storage Temperature
+125 +125 30,000 installed unpressurized area Figure grams MHrs 25°C Full load Physical Characteristics
Environmental
Altitude Case Dimensions Operating Orientation Weight MTBF (Estimate: 217F) Table
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Datasheet 5038,
SPDMXD28 Cobra Series
Ordering Information: Part number SPDMXD28. denotes number channels. channel part, part number SPDM6D28.
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SPDMXD28 Cobra Series Cobra Series Programmable Multi-Channel Amp

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