CPFE500F Application Note
Document Number : 61066 iss 2
Page 1 of 17
CPFE500
AC/DC Power Supply Series
APPLICATION NOTE
Страница 1: ...CPFE500F Application Note Document Number 61066 iss 2 Page 1 of 17 CPFE500 AC DC Power Supply Series APPLICATION NOTE ...
Страница 2: ... AUXILIARY SUPPLY AUX 9 POWER ON SIGNAL ENA 9 INVERTER OUTPUT GOOD IOG 9 REMOTE ON OFF 9 5 OUTPUT PROTECTION 11 NO LOAD OPERATION 11 OVER CURRENT OPERATION OCP 11 OVER TEMPERATURE PROTECTION OTP 11 OVER VOLTAGE PROTECTION OVP 11 6 COOLING REQUIREMENTS 12 7 PSU MOUNTING 13 8 RELIABILITY 14 9 ELECTROMAGNETIC COMPATIBILITY 15 INSTALLATION GUIDELINES FOR EMC 16 10 CONNECTION 17 AC INPUT CONNECTOR J1 M...
Страница 3: ...57 6V On models fitted with output OR ing diode the maximum voltage shown above will be the voltage before the OR ing diode The maximum adjustment voltage after the OR ing diode will subsequently be reduced by up to 1V The main output voltage auxiliary output voltage and output signals are isolated from the baseplate but not isolated from each other The remote on off control is isolated from all o...
Страница 4: ... connected to the voltage reference of the output voltage control amplifier see figure 1 below Figure 1 CPFE500 TRIM terminal Internal Circuit The output voltage can be decreased from the adjusted set point by connecting an external resistance between TRIM and S Do not connect external resistance between TRIM and S this will cause output instability Alternatively the trim terminal maybe driven by ...
Страница 5: ...eased load current or achieve N 1 PSU redundant operation By connecting the PC terminal J2 J3 pin 7 of each PSU together and setting the output voltages within 1 the individual PSU s will share the load current A maximum of 6 PSU s of the same model can be connected in parallel Current balancing between units will have a some error and the maximum output current should be derated as follows 2 3 un...
Страница 6: ...change the voltage programming calculation refer to Figure 1 For N 1 redundant systems individual voltage source circuits would be advisable for each PSU to maintain the system redundancy Figure 3 Basic Parallel connection Figure 4 Parallel connection with adjusted output Figure 5 Parallel connection with adjusted output from voltage source ...
Страница 7: ... at the end of a 150mm length of a twisted pair of cables terminated with a 100nF ceramic capacitor and a 120µF electrolytic capacitor see Figure 6 The earth wire of the oscilloscope probe should be as short as possible winding a link wire around the earth collar of the probe is the preferred method PSU AC Input Live Neutral Load C1 C2 C1 120µF Electrolytic C2 100nF Ceramic Scope Scope probe earth...
Страница 8: ...olex 22 04 1101 The pin functions of each connector are identical see Figure 8 below Figure 8 Connector J2 J3 Pinout J2 J3 Pin Function 1 VE REMOTE SENSE 2 VE REMOTE SENSE 3 COM 4 REMOTE ON OFF VE 5 REMOTE ON OFF VE 6 AUX 7 CURRENT SHARE 8 TRIM 9 ENA Output Good 10 IOG Recommended mating parts are Molex 22 01 1102 Molex 5051 series 10way housing Molex 08 70 0064 Molex 5159 series 22 28AWG crimp te...
Страница 9: ...cifications for the ENA signal are Signal Type Open collector referenced to COM terminal Sink Current 10mA max Open circuit voltage 75V max INVERTER OUTPUT GOOD IOG The IOG signal is an open collector output which provides an indication that the switching inverter is operating The signal is low when the inverter is normally operating and high when the inverter stops or is operating abnormally Grou...
Страница 10: ...ges fit an external series resistor to limit the current as follows ON OFF Terminal current Output Voltage 2 5mA 0 5mA ON Less than 0 15mA OFF Figure 10 on off control with external switch Figure 11 connection when on off control is not used Figure 12 on off control with external optocoupler When on off control is not required the PSU may be permanently enabled as per figure 11 by fitting two shor...
Страница 11: ... exceeds 90 115DegC for 12V models or 105 130DegC for all other models OTP will shutdown the main output The Auxiliary output is not affected during OTP condition To restart the PSU main output allow the unit to cool and either i remove the ac supply for 10 seconds and then reapply or ii cycle the on off control OVER VOLTAGE PROTECTION OVP An overvoltage on the main output will cause the main outp...
Страница 12: ...mounted components Where it is necessary to verify the PSU component temperatures in the end application refer to Figure 14 for internal component temperature limits Figure 14 Internal Component Temperature Limits Component Reference Component Function Temperature Limit C1 C2 C3 C4 C5 EMC capacitor Type X2 100DegC C7 C8 C10 C14 C15 EMC capacitor Type Y2 100DegC R2 R9 R10 Surge Suppression Varistor...
Страница 13: ... this material will depend on the relative flatness of the two surfaces and should be chosen to provide thermal contact across the whole area of the PSU baseplate The PSU has 10 off 4 5mm mounting holes in the baseplate 5 off on each side Use a mounting pattern to spread the force evenly over the baseplate For thicker thermal interface materials use more fixings and tighten progressively See Figur...
Страница 14: ...rdia issue 1 Caluclation Method Method 1 case 3 Environment GB GC ground Benign Controlled Power 504w Duty Cycle 100 Baseplate MTBF MTBF temperature c hours million hours 25 887826 0 888 40 533421 0 533 80 115896 0 116 MTBF CPFE500F 0 100 1 000 25 35 45 55 65 75 Base Plate temperature c MTBF Million Hours ...
Страница 15: ...Page 15 of 17 9 ELECTROMAGNETIC COMPATIBILITY Figure 16 Typical conducted EMC measurement 12V model 230Vac 100 load Figure 17 Typical conducted EMC measurement 24V model 230Vac 100 load Figure 18 Typical conducted EMC measurement 48V model 230Vac 100 load ...
Страница 16: ... current Fit the capacitance as close as possible to the load Cables All cables and PCB tracks should be regarded as both radiation sources and receivers The following tips will assist in maximising EMC performance Both AC input and DC power output cables should be run as close as possible to the earthed metal box plane Input and output cables should be routed as far away from each other as possib...
Страница 17: ...s 10 way housing UL94V 0 08 70 0064 Molex 5159 series crimp terminal 22 28AWG SIGNAL CONNECTORS J2 J3 PIN DEFINITION J2 J3 pin Function 1 sense 2 sense 3 COM return for pins 6 7 8 9 10 4 remote on off 5 remote on off 6 Aux 7 Current share 8 Trim 9 ENA 10 IOG POWER TERMINALS The ve and ve output power terminals each have one M6x18 vertical stud M6 nuts flat washers and spring washers are supplied f...
