CPA550-4530G

Compact PCI® CPA / CPD Series 200 – 550 Watt AC-DC and DC-DC Converters Features • • • • • • • • • • • • Compliant to PICMG® CompactPCI® specifications Wide range DC or AC input with PFC Extremely high efficiency and high power density Low inrush current 4 high current outputs with flexible load distribution Integrated ORing FETs / diodes for true redundancy Inhibit and enable inputs Remote sense lines Single-wire current share function for 3 outputs Hot-swap capability 47 pin connector, type Positronic Overtemperature, overvoltage, overcurrent, and overpower protection Safety-approved to the latest edition of UL/CSA 60950-1 and IEC/EN 62368-1. 233.3 7.8" 6U 100 3.94" 3U 40.4 1.6" 162.5 6.4" Table of Contents 40.6 1.6" 8 HP 162.5 6.4" Description........................................................................................2 Model Selection.................................................................................2 Functional Description.......................................................................3 Electrical Input Data..........................................................................5 Electrical Output Data.......................................................................7 Auxiliary Functions.......................................................................... 11 Electromagnetic Compatibility (EMC)..............................................14 Immunity to Environmental Conditions............................................17 Mechanical Data..............................................................................18 Safety and Installation Instructions..................................................19 Description of Options.....................................................................21 belfuse.com/power-solutions BCD20005-G_AP2, 9 January 2024 Compact PCI® CPA/CPD Series 200 – 550 Watt AC-DC and DC-DC Converters Description The CPA and CPD Series are highly reliable power supplies for CompactPCI® systems, which are increasingly used in communications, industrial, military, aerospace, and other applications. These power supplies offer high power density in plug-in modules that meet the requirements of the PICMG® power interface specification for Compact­PCI® systems. The converters use the patented EDGETM technology and provide important advantages such as flexible output power, extremely high efficiency, excellent reliability, full input-to-output isolation, negligible inrush current, hot-swap capability, soft start, and overtemperature protection. The input is protected by a transient suppressor (varistor) against surges and transients occurring on the source lines and cover an operating input voltage range from either 90 to 264 VAC or 36 to 75 VDC. The outputs are protected against continuous overload, open-circuit, and short-circuit. Full n+1 redundant operating mode is made possible by integrated ORing FETs or ORing diodes. When several converters are connected in parallel, a single-wire connection between converters ensures proper current sharing. The converters are designed with two or three separate forward converters with fixed switching frequency and synchronous rectifiers at their output. LEDs on the front panel and various warning signals display the status of the converter. The aluminum case acts as a heat sink and as an RFI shield. It is designed for vertical insertion into 19” rack systems, but it can also be mounted in any other position, as long as the necessary airflow is ensured. The connector is a 47 pin type from Positronic or similar. Several options are available to meet different requirements. Model Selection Table 1: Model selection Model 4 Output No. Operating Input Range Rated Power 1 Efficiency 2 Vi min – Vi max Case Options Po nom [W] min [%] typ [%] 200 80 83.2 3U x 8HP - 250 80 81.7 3U x 8HP L, A, C Vo nom [V] Io nom [A] Io max [A] CPD200-4530G Vo1 Vo2 Vo3 Vo4 5.0 3.3 12 -12 20 20 2.5 0.5 40 40 5.5 2 CPD250-4530G Vo1 Vo2 Vo3 Vo4 5.0 3.3 12 -12 25 20 4 1 40 40 5.5 2 CPD500-4530G Vo1 Vo2 Vo3 Vo4 5.0 3.3 12 -12 40 50 8 3 50 60 12 4 500 83 84.5 6U x 8HP C CPA200-4530G Vo1 Vo2 Vo3 Vo4 5.0 3.3 12 -12 20 20 2.5 0.5 40 40 5.5 2 200 81.5 83.7 3U x 8HP - CPA250-4530G Vo1 Vo2 Vo3 Vo4 5.0 3.3 12 -12 25 20 4 1 40 40 5.5 2 250 81.5 83.2 3U x 8HP L, A, C CPA500-4530G Vo1 Vo2 Vo3 Vo4 5.0 3.3 12 -12 40 50 8 3 50 60 12 4 500 83 85 6U x 8HP L, A, F, C CPA550-4530G Vo1 Vo2 Vo3 Vo4 5.0 3.3 12 -12 50 50 8 3 50 60 12 4 550 83 84.7 6U x 8HP - 3 4 1 2 fi min – fi max 36...(48)...75 VDC 90...(230)...264 VAC 47 – 63 Hz 3 The sum of the power of all outputs may not exceed the total power for the specified required forced-air cooling. Efficiency at TA = 25 °C, Vi nom, I o nom. Rated input voltage range is 100 – 240 VAC, rated input frequency range is 50 – 60 Hz. RoHS is standard, with G suffix at the end of the part number. NFND: Not for new designs. Note: The sequence of options in the model designation must follow the order above. G is always placed at the end. tech.support@psbel.com belfuse.com/power-solutions BCD20005-G_AP2, 9 January 2024 © 2024 Bel Fuse Inc. Page 2 of 21 Compact PCI® CPA/CPD Series 200 – 550 Watt AC-DC and DC-DC Converters Product Marking Label with specific type designation, applicable safety approvals and recognition marks, CE mark, warnings, patents, company logo, input voltage range, nominal output voltages and output currents, degree of protection, batch no., serial no., and data code including production site, modification status, and date of production. Identification of LEDs on the front panel. Functional Description The inputs of all converters are protected against surges and transients occurring on the source lines. A highly efficient input filter and an active inrush current limiter ensure a very low inrush current of short duration. This prevents circuit breakers and fuses from tripping at switch-on. All CPA models have an additional bridge rectifier and a boost converter to provide active power factor correction (PFC) according to EN 61000-3-2. The CPx200/250 models (see fig.1a) are equipped with two independent high efficient 2-switch forward converters, switching 180° out of phase to minimize the ripple current at the input. On the secondary side, two high-current synchronous rectifiers supply Vo1 (5 V) and Vo2 (3.3 V) with up to 40 A. The secondarycontrolled Vo3 (+12 V) post regulator is supplied by an additional winding of the 3.3 V main transformer. The linear regulator for Vo4 (–12 V) is supplied from the output choke of the Vo3 output. The output filters reduce ripple and noise to a minimum without com­promising the dynamic response. The models CPD500 (fig. 1b) and CPA500/550 (fig. 1c) exhibit a third forward converter for both outputs Vo3 and Vo4. The outputs Vo1 an Vo2 provide up to 50 and 60 A. All outputs are fully regulated and protected from the bus by decoupling FETs or diodes. A current monitor calculates the output power. As soon as the output power exceeds the maximum threshold level, the converter starts to reduce the output power by decreasing the output voltages. In contrast to the outputs Vo1 (5 V), Vo2 (3.3 V), and Vo3 (+12 V) with active current sharing, output Vo4 (–12 V) has a droop characteristic for passive current sharing. If for some reason the voltage of any output exceeds the nominal value significantly, the converter is permanently shut down. If option L is fitted, this occurs as well, if the max. output current is exceeded for a predefined time. To reset, the input voltage must be removed for a short time. Melcher’s Efficient Dual Geometric Edge Technology (EDGE TM) facilitates high current density, increases reliability by reducing component stresses, and decreases the amount of heat dissipated. The backbone of this patented technology is an interleaved, multi-channel forward converter utilising a transitional resonant switching technique and proprietary leading and trailing-edge pulse-width modulation. It has a proven track record in high-availability power solutions. RTN (22) INH# 39 EN# 27 1 Only Secondary control circuit Primary control circuit Vo1 Secondary control circuit 45 CY ORing FET ORing FET Vo2 ORing FET Vo3 ORing diode Vo4 + Cb Primary control circuit CY Inrush current limiter + + Secondary control circuit Bridge rectifier1 Input filter Fuse ACL –DCIN 47 CY Forward converter ≈135 kHz Forward converter ≈135 kHz + CY + Inhibit logic CY CPA models have a bridge rectifier and a boost converter Linear regulator + ACN +DCIN 46 Boost converter ≈135 kHz1 03110f + + – + Cy Fig. 1a Block diagram of CPA/CPD200 and CPA/CPD250 models. For the pin allocation, see Mechanical Data. tech.support@psbel.com belfuse.com/power-solutions BCD20005-G_AP2, 9 January 2024 © 2024 Bel Fuse Inc. Page 3 of 21 Compact PCI® CPA/CPD Series 200 – 550 Watt AC-DC and DC-DC Converters The switching frequency is typically 135 kHz. Recent models (CPD200/250 version V119 or later, CPA200/250 version V117 or later, CPA500/550 version V110 or later, not CPD500) exhibit a crystal oscillator with 131 kHz. All models have a separate auxiliary supply for the primary circuits, the CPD500 as well for the secondary circuits. The secondary bias voltage of the other models is generated by the forward converters. Only the forward converters are controlled by the inhibit and enable inputs; see Auxiliary Functions. +DCIN 46 + CY + CY Secondary control circuit Forward converter ≈135 kHz CY Secondary control circuit VSBias ORing FET Vo2 Secondary control circuit + ORing FET Vo3 Secondary control circuit Forward converter ≈135 kHz Vo1 ORing diode Vo4 Secondary control circuit Inhibit logic CY ORing FET ORing FET Vo1 Secondary control circuit Primary control circuit Primary control circuit Auxiliary converter + ORing FET Vo2 Secondary control circuit VPBias RTN (22) INH# 39 EN# 27 Cb Forward converter ≈135 kHz ORing FET Vo3 Secondary control circuit 45 + Primary control circuit CY Dual interleaved boost converter ≈105 kHz VDR Input filter Fuse –DCIN 47 CY Inrush current limiter with reverse polarity protecton JM041a Vi ORing diode Vo4 + + + – + Fig. 1b Block diagram of CPD500 models. For the pin allocation, see Mechanical Data. JM014b RTN (22) INH# 39 EN# 27 Inrush current limiter CY VPBias Inhibit logic Auxiliary converter Primary control circuit 45 Bridge rectifier Fuse ACL 47 Input filter CY Cb + Primary control circuit Vi Primary control circuit 2nd fuse (option F) Boost converter ≈135 kHz ACN 46 Forward converter ≈135 kHz + CY Forward converter ≈135 kHz + CY Forward converter ≈135 kHz + VSBias + + + CY + CY – + Fig. 1c Block diagram of CPA500/550 models. For the pin allocation, see Mechanical Data. tech.support@psbel.com belfuse.com/power-solutions BCD20005-G_AP2, 9 January 2024 © 2024 Bel Fuse Inc. Page 4 of 21 Compact PCI® CPA/CPD Series 200 – 550 Watt AC-DC and DC-DC Converters Electrical Input Data General Conditions: TA = 25 °C, unless TC is specified. Table 2a: Input data of CPD models Model Characteristics CPD200/250 Conditions min 36 typ CPD500 max min 75 36 80 0 Vi Operating input voltage Io = 0 – Io nom Vi nom Nominal input voltage TC min – TC max Vi abs Input voltage limits ≤60 s, no damage Ii Typical input current Vi nom, I o nom 5.1 / 6.3 2 Ii max Max input current Vi min, I o nom 7.0 / 8.7 2 Iinr p Peak inrush current Vi nom, I o nom Pi 0 No-load input power Vi min, Io = 0 Vi nom, Io = 0 Vi max, Io = 0 P i inh Input power when inhibited Vi min – Vi max Ci Input capacitance fswitch Switching frequency Vi nom, I o nom th Hold-up time Vi min → 0 V, Io nom 4 5 tbo Brown-out time 4 Vi nom, I o nom 4 5 tsu Start-up time Vi nom, I o nom 48 typ Unit max 75 48 0 VDC 80 12.5 7.6 / 9.5 2 17 12 14 18 27 17.5 A 25 28.6 28 27.5 30 3.2 31 W 9.4 1360 15 µF 135 135 kHz 150 ms 200 1500 Table 2b: Input data of CPA models Model Characteristics CPA200/250 Conditions min typ Vi Rated input voltage range Io = 0 – Io nom 100 Vi op Operating input voltage TC min – TC max 90 Vi nom Nominal input voltage 50 - 60 Hz 1 Vi abs Input voltage limits ≤60 s, no damage Ii Typical input current Vi nom, I o nom 1.1 / 1.4 2 Ii max Max input current Vi min, I o nom 2.9 / 3.6 2 Iinr p Peak inrush current Vi nom, I o nom Pi 0 No-load input power Vi min – Vi max, Io = 0 P i inh Input power when inhibited Vi min – Vi max Ci Input capacitance fswitch Switching frequency Vi nom, I o nom th Hold-up time Vi min → 0 V, Io nom tbo Brown-out time 4 Vi nom, I o nom tsu Start-up time Vi nom, I o nom Power factor Vi nom, I o nom 1 2 3 4 CPA500/550 max min 240 100 264 90 230 0 typ max 240 264 230 280 0 VAC 1 280 2.8 / 3.1 3 3.2 / 4.0 2 7.1 / 7.8 3 15 23 Unit A 20 30 26 3.2 32 3.2 W 1 4 µF 135 135 kHz 20 20 ms 150 0.95 150 0.95 W/VA Rated input frequency: 50 – 60 Hz, operating input frequency range: 47 – 63 Hz First value for CPD/CPA200, 2nd value for CPD/CPA250 First value for CPA500, 2nd value for CPA550 Short interruption of Vi without affecting the outputs (EN 61000-4-11) tech.support@psbel.com belfuse.com/power-solutions BCD20005-G_AP2, 9 January 2024 © 2024 Bel Fuse Inc. Page 5 of 21 Compact PCI® CPA/CPD Series 200 – 550 Watt AC-DC and DC-DC Converters Input Fuse and Reverse Polarity Protection A metal oxide varistor (voltage dependent resistor VDR) together with the input filter form an effective protection against high input voltage transients, which typically occur in most installations. An incorporated fuse protects the converter against further damage in the case of a failure. Note: The fuse is not customer-accessible. Table 3: Fuse specification Model Fuse rating Reference CDP200/250 250 V, 12.5 A T Schurter SPT 5x20, 0001.2515 CPA200/250 250 V, 5 A T Schurter SPT 5x20, 0001.2511 CPD500 80 V, 25 A F Littlefuse FKS, 166.7000.525 CPA500/550 250 V, 10 A T Schurter MXT250, 0034.6925 To avoid unwanted power losses, the CPD200/250 models are not protected against reverse polarity at the input by a serial diode, but only with an antiparallel diode. In the case of reversed input voltage, the input fuse will blow; however no further damage will occur. The CPD500 models are protected against reverse polarity by a special circuitry, which generates no losses. The converter will simply not start-up, but no damage will occur. The CPA Series converters are designed for AC input and have a rectifier bridge on the input. Input Current Limitation All converters incorporate an active inrush current limiter in the input circuitry, which reduces the peak inrush current value by a factor of 10 – 15 to protect connectors and switching devices from damage. Note: The inrush current limitation is achieved using electronic circuitry. For effective limitation the converter should not be switched on and off more frequently than every 8 seconds. Input Undervoltage Shutdown CPD200/250 models start at approx. Vi = 22 V, when the input voltage is applied; at decreasing Vi, they switch off at approx. 21 V. Note: The input current I i may exceed I i max, if Vi ≤ Vi min. CPD500 models start at Vi = 35 V and switch off at Vi = 33 V. CPA models exhibit an undervoltage trigger controlling start-up and shutdown. The threshold is between 80 and 90 VAC. See also Power Fail Signal. Note: CPA200/250 with version ≤ V116 should not be operated at Vi ≤Vi min, as these models have no undervoltage shutdown and will therefore operate with a high input current at full load. Efficiency The efficiency is specified in table 1. Its dependence upon the input voltage Vi is shown in fig. 2a (CPA models) and fig. 2b (CPD500 models). The efficiency of CPD200/250 models depends only marginally upon Vi. η [%] 90 η [%] CPA500/550 JM042 JM018a 86 86 85 CPD500 82 84 CPA200/250 78 0 50 100 150 200 Fig. 2a CPA Series: Efficiency versus input voltage 250 VAC 83 40 50 60 70 V Fig. 2b CPD500 Series: Efficiency versus input voltage tech.support@psbel.com belfuse.com/power-solutions BCD20005-G_AP2, 9 January 2024 © 2024 Bel Fuse Inc. Page 6 of 21 Compact PCI® CPA/CPD Series 200 – 550 Watt AC-DC and DC-DC Converters Electrical Output Data General Conditions for table 4: – TA = 25 °C, unless Tc is specified. – CPD/CPA200: 250 LFM (1.25 m/s), CPD/CPA250: 400 LFM (2 m/s) – Sense lines connected directly at the connector Table 4a: Output data of CPD/CPA200 and CPD/CPA250 Vo1 (5.0 V) Output Characteristics Conditions Vo Output voltage  Io nom Nominal output current Io max Max. output current IoL Output current limit Io min Minimum load Vo Output voltage noise 4 ∆VoV Static line regulation ∆VoL Static load regulation ∆VoS Overshoot at switch on/off Vo d td α Vo Dynamic load regulation V i nom, 50% Io nom  max min typ max 4.95 5.0 5.05 3.25 3.3 3.35 20 / 25 1 A 50 no min. load required no min. load required 20 20 Total 45 Temperature coefficient of output voltage 40 50 BW = 20 MHz 4 Cext = 22 μF + 100 nF 60 40 60 Vi min – Vi max, Io nom ±10 ±10 V i nom, 50 - 100% Io max ±10 ±10 0 Vo2: ∆Io2 = 10 A, dIo2/dt = 2 A/µs TC min – TC max 0 – Io nom, Vi min – Vi max mVpp mV 0 ±120 Vo1: ∆Io1 = 10 A, dIo1/dt = 2 A/µs V 20 40 Vi min – Vi max TC min – TC max Vi nom, Io nom Recovery time Unit typ Switch. frequ. Voltage deviation Vo2 (3.3 V) min ±120 100 100 µs ±0.3 ±0.2 %/K Table 4b: Output data of CPD/CPA200 and CPD/CPA250 Vo3 (+12 V) Output Characteristics Conditions Vo Output voltage  V i nom, 50% Io nom  Io nom Nominal output current Io max Max. output current IoL Output current limit Io min Minimum load max 11.76 12.0 12.24 -11.30 -12.0 -12.48 2.5 / 4 1 5.5 Vi min – Vi max TC min – TC max 2 7 no min. load required Vi min – Vi max, Io nom ±10 V i nom, 50 - 100% Io max ±30 ∆VoS Overshoot at switch on/off Voltage deviation Recovery time Temperature coefficient of output voltage 0 Vo4: ∆Io4 = 0.5 A, dIo4/dt = 2 A/µs TC min – TC max 0 – Io nom, Vi min – Vi max 120 mVpp ±10 -380 3 mV 0 ±200 Vo3: ∆Io3 = 2 A, dIo3/dt = 2 A/µs A 3.5 120 Static load regulation V 0.5 / 1 1 BW = 20 MHz 4 Cext = 22 μF + 100 nF Static line regulation α Vo typ Total ∆VoL td min Vi nom, Io nom ∆VoV Dynamic load regulation max Switch. frequ. Output voltage noise 4 Unit typ Io3 > 75% Io4 2 Vo Vo d Vo4 (–12 V) min ±200 500 500 µs ±0.3 ±0.5 %/K First value for CPD200/CPA200, second value for CPD250/CPA250 Minimum load is only required to maintain regulation of output Vo4 3 Droop characteristic for passive current sharing 4 Measured with a probe according to IEC/EN 61204, annex A 1 2 tech.support@psbel.com belfuse.com/power-solutions BCD20005-G_AP2, 9 January 2024 © 2024 Bel Fuse Inc. Page 7 of 21 Compact PCI® CPA/CPD Series 200 – 550 Watt AC-DC and DC-DC Converters General conditions for table 5: – TA = 25 °C, unless Tc is specified. – CPD500, CPA500: 300 LFM (1.5 m/s), CPA550: 400 LFM (2 m/s) – Sense lines connected directly at the connector Table 5 a: Output data of CPD500 and CPA500/550 Vo1 (5.0 V) Output Characteristics Conditions Vo Output voltage  Io nom Nominal output current Io max Max. output current IoL Output current limit Io min Minimum load Vo Output voltage noise 2 ∆VoV Static line regulation ∆VoL Static load regulation ∆VoS Overshoot at switch on/off Vo d td α Vo Dynamic load regulation V i nom, 50% Io nom  Vi min – Vi max TC min – TC max Vo2 (3.3 V) min typ max min typ max 4.95 5.0 5.05 3.25 3.3 3.35 40 / 50 1 50 / 50 1 50 60 52.2 62 Vi nom, Io nom Total BW = 20 MHz 2 Cext = 22 μF + 100 nF Voltage deviation Recovery time Temperature coefficient of output voltage Vi min – Vi max, Io nom 74 no min. load required 50 50 ±10 ±10 ±10 V i nom, 50 - 100% Io max mV 0 ±150 Vo2: ∆Io2 = 40 A, dIo2/dt = 2 A/µs TC min – TC max 0 – Io nom, Vi min – Vi max mVpp ±10 0 Vo1: ∆Io1 = 20 A, dIo1/dt = 2 A/µs V A 63 no min. load required Switch. frequ. Unit ±150 300 300 µs ±0.3 ±0.2 %/K Vo3 (+12 V) Vo4 (–12 V) Unit Table 5 b: Output data of CPD500 and CPA500/550 Output Characteristics Conditions Vo Output voltage  V i nom, 50% Io nom  Io nom Nominal output current Io max Max. output current IoL Output current limit Io min Minimum load typ max -12.0 -12.48 8 3 12 4 13.5 4.3 no min. load required no min. load required Vi min – Vi max TC min – TC max BW = 20 MHz 2 Cext = 22 μF + 100 nF 120 Vi min – Vi max, Io nom ±10 V i nom, 50 - 100% Io max ±50 Static line regulation ∆VoL Static load regulation ∆VoS Overshoot at switch on/off α Vo min -11.52 Total ∆VoV td max 12.24 Switch. frequ. Output voltage noise 2 Dynamic load regulation typ 12.0 Vi nom, Io nom Vo Vo d min 11.76 Voltage deviation Recovery time Temperature coefficient of output voltage 0 Vo4: ∆Io4 = 1 A, dIo4/dt = 2 A/µs TC min – TC max 0 – Io nom, Vi min – Vi max A 120 mVpp ±10 -220 3 mV 0 ±200 Vo3: ∆Io3 = 4 A, dIo3/dt = 2 A/µs V ±150 300 300 µs ±0.3 ±0.5 %/K First value for CPA500, second value for CPA550 Measured with a probe according to IEC/EN 61204, annex A 3 Droop characteristic for passive current sharing 1 2 tech.support@psbel.com belfuse.com/power-solutions BCD20005-G_AP2, 9 January 2024 © 2024 Bel Fuse Inc. Page 8 of 21 Compact PCI® CPA/CPD Series 200 – 550 Watt AC-DC and DC-DC Converters Hold-up Time of CPD Models For extended hold-up time of CPD models, use external output capacitors or decoupling diodes and input capacitors of adequate size. Formula for additional external input capacitor:      2 • Po • (t h total – th) • 100    Ci ext =  –––––––––––––––––––––     η • (Vti 2 – Vi min2) whereas: C i ext = external input capacitance [mF] Po = output power [W] η = efficiency [%] th total = total hold-up time [ms] t h = hold-up time [ms] Vi min = minimum input voltage [V] Vti = threshold level [V] Note: After Vi was removed, the outputs maintain their voltage for the time t h. Even if Vi comes back during t h, but after th, the output voltage might be affected. Redundant Operation and Hot Swap Due to the integrated ORing FETs/diodes, the converters are designed to be operated in redundant systems. Hot swap is also possible, but the output voltages of each bus may deviate dynamically by ≤5% during the plug-in / plug-out operation. Note: We recommend connecting some capacitors parallel to the bus to limit voltage deviations during hot swapping and during switch-on / switch-off of the input voltage of one of the parallel-connected converters. Output Characteristic and Protection All outputs are fully protected against continuous open-circuit (no load) and continuous short-circuit conditions. All outputs of CPx200/250 models have a constant current limitation with a rectangular characteristic; see figure 3. In addition, the total power from outputs Vo1, Vo2, and Vo3 is limited to Po max, resulting in a free choice of load distribution between these outputs. Output Vo4 is disabled in the case of overtemperature generated by overcurrent. In CPA500/550 and CPD500 models, the total power of all four outputs is limited to Po max. In all models, all outputs are monitored for an overvoltage condition. If an overvoltage of 120 – 130% is detected, the converter is permanently disabled. To reset, the input voltage must be removed for 10 – 20 seconds. Note: The models CPA500/550 with version number before V110 need approx. 60 s to recover. Vo/Vo nom 1.0 0.95 Io nom Io max Io L 05186b 0.5 0 Io Fig. 3 Typical output characteristic Vo versus I o tech.support@psbel.com belfuse.com/power-solutions BCD20005-G_AP2, 9 January 2024 © 2024 Bel Fuse Inc. Page 9 of 21 Compact PCI® CPA/CPD Series 200 – 550 Watt AC-DC and DC-DC Converters Thermal Considerations and Protection If a converter is mounted in the upright position with airflow as specified in the general conditions of the tables 4 and 5, allowing unrestricted forced-air cooling, and is operated at its nominal input voltage and power at maximum ambient temperature TA max (see Temperatures), the temperature at the measurement point of the case temperature TC (see Mechanical Data) will approach after an initial warm-up phase the indicated maximum value of TC max (105 °C). However, the relationship between TA and TC depends heavily on the operating conditions and the system integration. The thermal conditions are significantly influenced by the input voltage, the output current, the airflow, and the temperature of the adjacent elements and surfaces. TA max is therefore, contrary to TC max , an indicative value only. Caution: The installer must ensure that under all operating conditions TC remains within the limits shown in the diagrams fig. 4. Po /Po nom 1.0 Po /Po nom JM011a 1.0 200 LFM = 1 m/s 250 LFM = 1.25 m/s Convection cooling in upright position 400 LFM = 2 m/s Convection cooling in upright position 0.6 0.5 0 05190c 0.5 50 40 TA min 60 70 90 °C 80 Fig. 4a Output power versus temperature TA at Vi nom (CPD/CPA200) Po /Po nom 1.0 0 TA min 40 50 60 70 80 90 °C Fig. 4b Output power versus temperature TA at Vi nom (CPD/CPA250) 300 LFM = 1.5 m/s (CPA/CPD500) 400 LFM = 2 m/s (CPA550) JM012b Convection cooling in upright position CPA/CPD500 0.6 0.5 CPA550 0 TA min 40 50 60 70 80 90 °C Fig. 4c Output power versus TA at Vi nom (CPA500/550, CPD5 Note: Forced-air cooling (or an additional heat sink on customer­-specific models) can improve the reliability or allow for higher TA, as shown in the diagrams fig. 4, but TC max shall never be exceeded. A temperature sensor fitted on the main PCB provides approx. 20 °C below TC max a warning signal (DEG#), at which the control logic begins to reduce the output power. The output power returns to the normal value, when the temperature drops back below this limit; see Temperature Warning and Shutdown. tech.support@psbel.com belfuse.com/power-solutions BCD20005-G_AP2, 9 January 2024 © 2024 Bel Fuse Inc. Page 10 of 21 Compact PCI® CPA/CPD Series 200 – 550 Watt AC-DC and DC-DC Converters Output Filter The output ripple voltage can be reduced by an external filter to less then 5 mVpp. Recommended values: • C1, C2: Low ESR capacitor, e.g., OS-CON 100 – 470 µF • L1, L2: Choke 1 – 4.7 µH with appropriate rated current, e.g., Coiltronics® HC2LP 1 µH /33 A or 2.2 µH /24 A. JM010b 30 46 1–4 Input 33 13 –18 Vo1SENSE Vo1 10 Ω L1 Vo2SENSE Vo2 L2 10 Ω C2 47 5 –12 5V 3.3 V + + C1 RTN Gnd Fig. 5 Output filter reducing the output ripple of Vo1 and Vo2. An alternative solution is shown in green. Auxiliary Functions Inhibit and Enable The inhibit input INH# enables (logic high) or disables (logic low, pull down) all outputs, when a logic signal (TTL, CMOS) is applied. In systems consisting of several converters this feature may be used to control the activation sequence of the converters or to enable the source to start-up, before full load is applied. When INH# is low, the converter cannot be activated by the EN# pin Note: If this function is not used, the inhibit pin 39 can be left open-circuit (not connected). If pin 39 is connected to a return pin (e.g. pin 22), the internal logic will disable all outputs. The inhibit input is protected by a decoupling diode. EN# (pin 27) is CMOS-compatible. However, we recommend to connect it directly with a return pin (e.g. pin 22) to enable the converter. Pin 27 is shorter than the others, ensuring start-up only, after all other pins were connected to the system. This provides true hot-swap capability. Note: When a CPA or CPD500 converter is disabled by INH# and/or EN #, the PFC booster remains active, keeping the boost capacitor Cb (fig. 1) charged. As a result, there is no inrush current at restart. Note: When a CPD 500/550 converter is disabled, on outputs 3 and 4 may appear a little voltage under no-load condition. This can be avoided by a small preload. Table 6: Inhibit characteristics Characteristics V inh Inhibit voltage  tr Rise time td Delay time Conditions V o = on V o = off Vi min – Vi max min typ max -2 0.8 2.4 50 Unit V 120 ms depending on Io 06153d 46 47 Fig. 6 Inhibit and enable inputs INH# 39 EN# 27 RTN Vo /Vo nom 1 0.1 0 VINH# 06155a tr t tf Inhibit 1 (22) 0 t Fig. 7 Typical output response as function of inhibit voltage. tech.support@psbel.com belfuse.com/power-solutions BCD20005-G_AP2, 9 January 2024 © 2024 Bel Fuse Inc. Page 11 of 21 Compact PCI® CPA/CPD Series 200 – 550 Watt AC-DC and DC-DC Converters Temperature Warning and Shutdown A temperature warning circuitry monitors the case temperature TC. Its output signal V DEG# changes from high to low impedance, when the TC exceeds the upper threshold level, and changes back to high impedance, when TC falls below the lower threshold level, which is 85 °C ± 5 °C. Pin 38 (degrade signal DEG#) is internally connected via the collector-emitter path of an NPN transistor to the signal return pin 22. The current IDEG# through pin 38 should not exceed 40 mA, and VDEG# should not exceed 40 V. If TC exceeds 105 °C, the converter will be disabled. It resumes operation automatically, once TC falls below 105 °C. 11056a VDEG# [V] Vo+ 46 Input IDEG# 0.6 signal DEG# 0.4 2 0.2 22 0 RTN Fig. 8 Degrade signal: NPN output VDEG# ≤40 V, I DEG# ≤20 mA 0.8 4 VDEG# 47 thermal shutdown 6 DEG# 1 05189c 8 Rp 38 Po /Po max 10 60 70 80 90 100 110 °C 0 Fig. 9 Degrade signal VDEG# versus case temperature TC Power Fail Signal The power fail circuitry monitors the input voltage Vi and all output voltages. The signal VFAL# changes from high to low impedance (300 MΩ Insulation resistance at 500 VDC 1 CPA models Input to (Case + Output) Sub-assemblies connecting input to output are pre-tested with ≥ 3 kVDC. Sub-assemblies connecting input to output are pre-tested with ≥ 4.3 kVDC or 3 kVAC. tech.support@psbel.com belfuse.com/power-solutions BCD20005-G_AP2, 9 January 2024 © 2024 Bel Fuse Inc. Page 20 of 21 Compact PCI® CPA/CPD Series 200 – 550 Watt AC-DC and DC-DC Converters Operation at >60 Hz and Leakage Currents Operation up to 440 Hz is possible, but the X and Y caps are not safety-approved to this frequency. The efficiency decreases by approx. 2%, and the leakage currents are proportional higher. Protection Degree and Cleaning Liquids The converters correspond to protection degree IP 20, provided that the female connector is fitted. The power supplies are not hermetically sealed. In order to avoid possible damage, any penetration of cleaning and other fluids shall be avoided. Safety of Operator-Accessible Output Circuits If the output circuit of a converter is operator- accessible, it shall be an ES1 circuit according to the IEC/EN 62368-1 related safety standards. However, it is the sole responsibility of the installer to ensure the compliance with the relevant and applicable local safety regulations Options L: Output Current Latch All CPA/CPD models exhibit a latching shutdown, which is activated if only one output voltage is too high; see Output Characteristic and Protection. If option L is fitted, this latch is as well activated, if the current limit of one output is exceeded for approx. 0.5 s. A: Face Plate without Logo No logo is not printed to the front plate. F: Built-in Second Fuse Available for CPA500 models only. A 2nd fuse in the neutral input line provides safe phase to phase connection at low mains voltages (e.g., USA 120/208 V / 60 Hz systems). The built-in second fuse enables safe connection to the mains, where phase and neutral line are not defined, as e.g., in the case of plug and socket connection to the mains via German Schuko-plugs; see also Safety and Installation Instructions. C: Protective Lacquer All boards are covered by a protective lacquer. G: RoHS RoHS-compliant for all six substances. This feature is standard. NUCLEAR AND MEDICAL APPLICATIONS - These products are not designed or intended for use as critical components in life support systems, equipment used in hazardous environments, or nuclear control systems. TECHNICAL REVISIONS - The appearance of products, including safety agency certifications pictured on labels, may change depending on the date manufactured. Specifications are subject to change without notice. tech.support@psbel.com belfuse.com/power-solutions BCD20005-G_AP2, 9 January 2024 © 2024 Bel Fuse Inc. Page 21 of 21