CPS250-M. Product Descriptions. 250 Watts (forced air) 155 Watts (convection) Special Features

Transcription

1 CPS250M 250 Watts (forced air) 155 Watts (convection) ITE / Medical CPS250M Page 1 Total Power: Watts Input Voltage: Vac # of Outputs: Single Special Features Designed for forced air and natural convection cooling Medical and ITE safety approvals, 2x MOPP Dual fused Type BF ready Active Power Factor Correction, compliant Builtin Class B EMI filter Less than 1U high LPX100 enclosure kit available <500 mw noload power consumption Threeyear warranty (consult factory for extended terms) Product Descriptions The CPS250M series power supply features a universal 90264Vac input and employs active power factor correction to minimize input harmonic current distortion and to ensure compliance with the international EN standard. The power supply produces a tightly regulated main output and come with 12Vdc fan output as standard. The main output can deliver up to 155W continuously with convection cooling, or up to 250W continuously with at least 300LFM forced air cooling. The output can be adjusted up to +10% of nominal setpoint through trimpot. The power supply s main output has a holdup time of 10 ms minimum when the supply is fed with a 115/230 Vac input and is delivering 225Watts of output power. The CPS250M series power supply is comprehensively protected against overvoltage, overcurrent, over temperature and shortcircuit conditions. The power supplies operate from 20 O C to +50 O C ambient with start up at 40 O C. Safety TUV: / UL/CSA: / CB: IEC / CE: LVD / RoHS CCC: Approval

2 Model Numbers CPS250M Page 2 Standard Output Voltage Minimum Load Maximum Load Convection Cooling Peak Load Convection Cooling 1 Maximum Load Forced Air 2 CPS253M 12V 0A 12.92A 15.5A 20.83A CPS255M 24V 0A 6.45A 7.74A 10.42A CPS258M 48V 0A 3.23A 3.88A 5.21A Note 1 Peak Load current cannot exceed 30 seconds with maximum 10% duty cycle. Note 2 Requires at least 300 LFM of airflow. Options CPS253M1 (Suffix 1 for optional features, please refer to Page 29 for more details).

3 Electrical Specifications CPS250M Page 3 Absolute Maximum Ratings Stress in excess of those listed in the Absolute Maximum Ratings may cause permanent damage to the power supply. These are stress ratings only and functional operation of the unit is not implied at these or any other conditions above those given in the operational sections of this TRN. Exposure to any absolute maximum rated condition for extended periods may adversely affect the power supply s reliability. Table 1. Absolute Maximum Ratings: Parameter Model / Conditions Symbol Min Typ Max Unit Input Voltage AC continuous operation All Models V IN,AC Vac Maximum Output Power (Main + Fan) Convection continuous operation Maximum Output Power (Main + Fan) Force air continuous operation Isolation Voltage 1 Input to output Input to safety ground Outputs to output ground All Models P O,maxCC 155 W All Models P O,maxFA 250 W All Models All Models All Models Ambient Operating Temperature 2 All Models T A O C Cold Startup Temperature 3 All Models T ST 40 O C Storage Temperature All Models T STG O C Vdc Vac Vac Humidity (noncondensing) Altitude Altitude Operating Nonoperating Operating All Models All Models ITE Application Medical Application % % Meters Meters Nonoperating All Models Meters Note 1 All Hipot testing will pass without removal of any components. Note 2 Please refer to Page 28 for derating from 50 O C to 70 O C. Note 3 40 O C start up after a 5 minutes stabilization time before going to 20 O C. Power supply start up below 20 O C may result in instability but will not cause damage.

4 Input Specifications CPS250M Page 4 Table 2. Input Specifications: Parameter Conditions Symbol Min Typ Max Unit Operating Input Voltage, AC 1 All V IN,AC / Vac Input AC Frequency 2 Maximum Input Current (I O = I O,maxFA ) No Load Input Power (V O = ON, I O = 0) Medical Application V IN,AC = 110Vac f IN,AC / V IN,AC = 90Vac I IN,max 3.5 A RMS V IN,AC = 50Hz or 60Hz P IN,noload 0.5 W Harmonic Line Currents All THD Per EN Class A Power Factor 3 All PF 0.9 Startup Surge Current 25 O C Input Fuse V IN,AC = 230Vac Cold start Internal, L and N 250Vac Hz I IN,surge 70 A PK 6.3 A Input AC Low Line Startup Voltage V IN,ACstart Vac Input AC Undervoltage Lockout Voltage V IN,ACstop Vac 25 O C Hold Up Time V IN,AC = 100Vac I O = I O,maxFA η % V IN,AC = 115 / 230Vac P O = 225W t HoldUp 10 msec Turn On Delay V IN,AC = 100Vac t TurnOn 2 Sec The Earth Leakage Current Secondary Output Leakage Current System Stability Class I Class II Phase Margin Gain Margin V IN = 264Vac, f IN,AC = 50/60 Hz V IN = 264Vac, f IN,AC = 50/60 Hz All I IN,leakage ua ua I IN,leakage 100 ua Ø db Note 1 Output load derating will apply for input voltage below 100Vac. Note 2 The power supply will have higher leakage current when input frequency is Hz. Note 3 Measured at 95W input power and above.

5 Output Specifications CPS250M Page 5 Table 3. Output Specifications: Parameter Condition Symbol Min Typ Max Unit Output Regulation At 25 O C, including factory setpoint, Line voltage and Load current variations %V O % Output Adjust Range 1 %V O % Output Ripple, pkpk 2 CPS253M CPS255M CPS258M Measure with a 0.1µF ceramic capacitor in parallel with a 10µF tantalum capacitor across the output & at 25 O C and output load 6W V O mv PKPK Convection Output Current, continuous Force Air Output Current, continuous Output Current, peak V O Overshoot / Undershoot 3 CPS253M CPS255M I O,maxCC CPS258M Convection cooling 3.23 All models I FAN,maxCC 0.5 CPS253M1 I SB,maxCC 0.1 CPS253M CPS255M I O,maxFA CPS258M All models 300 LFM forced air cooling I FAN,maxFA CPS253M1 I SB,maxFA 0.1 CPS253M CPS255M CPS258M Maximum duration of 30 seconds with maximum duty cycle of 10% I O,peak Tested with Maximum 330uF/Amp capacitive load, CR mode, %V O 7 % I O 80% I O,max Note 1 The adjust pot is shown on page 18. Note 2 Minimum load required to meet 1% ripple requirement. More details please refer to Page29. Note 3 All output voltages must rise and fall in a monotonic fashion. Worst case (line and load) overshoot and undershoot shall be less than 7% or 150mV whichever is greater with a minimum main output load of 150mA or capacitive load of 100uF and a maximum capacitive load of 330uF/A on the output tested on CR mode, 80% load max. A A A

6 Output Specifications con t CPS250M Page 6 Table 3. Output Specifications Parameter Condition Symbol Min Typ Max Unit Maximum Convection Output Power, continuous Maximum Force air Output Power, continuous V O Capacitive Load V O Dynamic Response Peak Deviation V O Dynamic Response Setting Time V O Long Term Stability Vo Temperature Coefficient V O Over Voltage Protection V O Over Current Protection FreeAir Convection ForcedAir Cooling Main output + fan output + Standby output Main output + fan output + Standby output, 400LFM Start up, CR load and capacitive load in parallel 50% (50% to 100% of I O,maxFA ) load change Output capacitance = 100µF/A 50% (50% to 100% of I O,maxFA ) load change Output capacitance = 100µF/A Max change over 24 hours after thermal equilibrium (30 mins) P O,maxCC 155 W P O,maxFA 250 W µf/a ±%V O 4 % t s 500 µsec ±%V O 1.0 % V IN,AC = 100Vac I O = I O,max %V O 0.04 %/ O C Latch off (AC recycle to reset) All %I O %V O % Over Temperature Protection All Auto Recovery Short Circuit Protection All Auto Recovery DCDC Switching Frequency All f SW,DCDC 108 KHz % %

7 Technical Reference Note CPS250M Page 7 CPS253M1 Performance Curves Figure 1: CPS253M1 Turnon delay via AC mains Load: IO = 18.75A (forced air) VIN = 90Vac Ch 1: VIN Ch 2: Remote Inhibit Ch3: VO Ch4: DCOK Figure 2: CPS253M1 Turnon delay via Remote Inhibit Load: IO = 18.75A (forced air) VIN = 90Vac Ch 1: VIN Ch 2: Remote Inhibit Ch3: VO Ch4: DCOK Figure 3: CPS253M1 Holdup Time VIN = 90Vac Load: IO = 18.75A (forced air) Ch 1: VIN Ch 2: Remote Inhibit Ch3: VO Ch4: DCOK Figure 4: CPS253M1 Holdup Time VIN = 264Vac Load: IO = 20.83A (forced air) Ch 1: VIN Ch 2: Remote Inhibit Ch3: VO Figure 5: CPS253M1 Output Voltage Startup Characteristic VIN = 90Vac Load: IO = 18.75A (forced air) Ch 3: VO Ch 4: DCOK Figure 6: CPS253M1 Ripple and Noise Measurement VIN = 115Vac Load: IO = 20.83A (forced air) Ch 2: VO Ch4: DCOK

8 CPS253M1 Performance Curves CPS250M Page 8 Figure 7: CPS253M1 Turn Off Characteristic via Remote Inhibit V IN = 115Vac Load: I O = 20.83A (forced air) Ch 2: Remote Inhibit Ch 3: V O Ch 4: DCOK Figure 8: CPS253M1 Inrush Current V IN = 264Vac Load: I O = 0A, Turn on Angle = 90 deg Ch 1: V IN Ch 2: I IN Figure 9: CPS253M1 Transient Response Vo Deviation (High to Low) V IN = 115Vac Load: I O = 100% to 50% load change, 1A/us slew rate Ch 2: I O Ch 3: V O Figure 10: CPS253M1 Transient Response Vo Deviation (Low to High) V IN = 115Vac Load: I O = 50% to 100% load change, 1A/us slew rate Ch 2: I O Ch 3: V O Efficiency (%) CPS253M1 Efficiency Curves Convection Out put Current (A) 90V ac 115V ac 230V ac 264V ac Figure 11: CPS253M1 Efficiency Room Temp. Convection V IN = 90 to 264Vac Load: I O = 10% increment to 12.92A Efficiency (%) CPS253M1 Efficiency Curves Forced Air Output Current (A) 90Vac 115Vac 230Vac 264Vac Figure 12: CPS253M1 Efficiency Room Temp. Forced Air V IN = 90 to 264Vac Load: I O = 10% increment to 20.83A, Fan=300LFM

9 Technical Reference Note CPS250M Page 9 CPS255M Performance Curves Figure 13: CPS255M Turnon delay via AC mains Load: IO = 9.38A (forced air) VIN = 90Vac Ch 1: VIN Ch 3: VO Figure 14: CPS255M Holdup Time Load: IO = 9.38A (forced air) VIN = 90Vac Ch 1: VIN Ch 3: VO Figure 15: CPS255M Holdup Time VIN = 264Vac Load: IO = 10.42A (forced air) Ch 1: VIN Ch 3: VO Figure 16: CPS255M Output Voltage Startup Characteristic VIN = 90Vac Load: IO = 9.38A (forced air) Ch 3: VO Figure 17: CPS255M Ripple and Noise Measurement VIN = 115Vac Load: IO = 10.42A (forced air) Ch 3: VO Figure 18: CPS255M Inrush Current VIN = 264Vac Load: IO = 0A, Turn on Angle = 90 deg Ch 1: VIN Ch 2: IIN

10 CPS255M Performance Curves CPS250M Page 10 Figure 19: CPS255M Transient Response Vo Deviation (High to Low) V IN = 115Vac Load: I O = 100% to 50% load change, 1A/us slew rate Ch 2: I O Ch 3: V O Figure 20: CPS255M Transient Response Vo Deviation (Low to High) V IN = 115Vac Load: I O = 50% to 100% load change, 1A/us slew rate Ch 2: I O Ch 3: V O Efficiency (%) CPS255M Efficiency Curves Convection Out put Current (A) 90V ac 115V ac 230V ac 264V ac Figure 21: CPS255M Input Current V IN = 115Vac Load: I O = 10.42A (forced air) Ch 2: I IN Figure 22: CPS255M Efficiency Room Temp. Convection V IN = 90 to 264Vac Load: I O = 10% increment to 6.45A Efficiency (%) CPS255M Efficiency Curves Forced Air Out put Current (A) 90V ac 115V ac 230V ac 264V ac Figure 23: CPS255M Efficiency Room Temp. Forced Air V IN = 90 to 264Vac Load: I O = 10% increment to 10.42A, Fan=300LFM

11 Technical Reference Note CPS250M Page 11 CPS258M Performance Curves Figure 24: CPS258M Turnon delay via AC mains Load: IO = 4.69A (forced air) VIN = 90Vac Ch 1: VIN Ch 3: VO Figure 25: CPS258M Holdup Time Load: IO = 4.69A (forced air) VIN = 90Vac Ch 1: VIN Ch 3: VO Figure 26: CPS258M Holdup Time VIN = 264Vac Load: IO = 5.21A (forced air) Ch 1: VIN Ch 3: VO Figure 27: CPS258M Output Voltage Startup Characteristic VIN = 90Vac Load: IO = 4.69A (forced air) Ch 3: VO Figure 28: CPS258M Ripple and Noise Measurement VIN = 115Vac Load: IO = 5.21A (forced air) Ch 3: VO Figure 29: CPS258M Inrush Current VIN = 264Vac Load: IO = 0A, Turn on Angle = 90 deg Ch 1: VIN Ch 2: IIN

12 CPS258M Performance Curves CPS250M Page 12 Figure 30: CPS258M Transient Response Vo Deviation (High to Low) V IN = 115Vac Load: I O = 100% to 50% load change, 1A/us slew rate Ch 2: I O Ch 3: V O Figure 31: CPS258M Transient Response Vo Deviation (Low to High) V IN = 115Vac Load: I O = 50% to 100% load change, 1A/us slew rate Ch 2: I O Ch 3: V O Efficiency (%) CPS258M Efficiency Curves Convection Out put Current (A) 90V ac 115V ac 230V ac 264V ac Figure 32: CPS258M Input Current V IN = 115Vac Load: I O = 5.21A (forced air) Ch 2: I IN Figure 33: CPS258M Efficiency Room Temp. Convection V IN = 90 to 264Vac Load: I O = 10% increment to 3.23A Efficiency (%) CPS258M Efficiency Curves Forced Air Out put Current (A) 90V ac 115V ac 230V ac 264V ac Figure 34: CPS258M Efficiency Room Temp. Forced Air V IN = 90 to 264Vac Load: I O = 10% increment to 5.21A, Fan=300LFM

13 Protective Function Specifications CPS250M Page 13 Input Fusing Protective Fuse is provided on the Line and Neutral side of the primary line of each power supply. 250Vac and 6.3A rated. Over Voltage Protection (OVP) The CPS250M series power supply main output will latch off during output overvoltage with the AC line recycled to reset the latch. CPS253M Parameter Min Nom Max Unit V O Output Overvoltage 15.6 / 18.0 V CPS255M Parameter Min Nom Max Unit V O Output Overvoltage 31.2 / 36 V CPS258M Parameter Min Nom Max Unit V O Output Overvoltage 62.4 / 72 V Over Current Protection (OCP) The CPS250M series power supply includes internal current limit circuitry to prevent damage in the event of overload or short circuit. The OCP mode is hiccup. Recovery is automatic when the overload is removed. The customer have access to the OCP potentiometer to set it for Forced Air condition or FreeAir Convection Rating. Please refer to Page 27 for more details. The OCP range under FreeAir Convection cooling is 120% to 150%. (typical setting is at 135%). The OCP range under ForcedAir cooling 103% to 120% (typical setting is110%). The OCP level does not vary linearly but rather 2 settings only and is either forced air or convection limits.

14 CPS253M CPS250M Page 14 Parameter Min Nom Max Unit V O Output Overcurrent (FreeAir cooling) / A V O Output Overcurrent (ForcedAir cooling) / A CPS255M Parameter Min Nom Max Unit V O Output Overcurrent (FreeAir cooling) 7.74 / 9.68 A V O Output Overcurrent (ForcedAir cooling) / A CPS258M Parameter Min Nom Max Unit V O Output Overcurrent (FreeAir cooling) 3.88 / 4.85 A V O Output Overcurrent (ForcedAir cooling) 5.37 / 6.25 A Short Circuit Protection (SCP) The power supply will withstand a continuous short circuit with no permanent damage. The power supply will automatically restart when the short circuit is removed. A short is defines as impedance less than 50 milliohms. The SCP mode is hiccup. Over Temperature Protection (OTP) The power supply will shut down during overtemperature condition and return back to normal operation when the power supply is cooled down (including hysteresis). The CPS250M series power supply might experience overtemperature conditions during a persistent overload on the output. Overload conditions can be caused by external faults. OTP might also be entered due to a loss of control of the environmental conditions e.g. an increase in the converter s ambient temperature due to a failing fan or external cooling system etc.

15 Mechanical Specifications CPS250M Page 15 Mechanical Drawing (12V Variant ) Note: All dimensions in mm.

16 Mechanical Drawing (24V, 48V Variants) CPS250M Page 16 Note: All dimensions in mm. Weight: The CPS250M series power supply weight is 0.44lb/0.2kg maximum.

17 Mechanical Drawing (Enclosure Kit) Part number for the Enclosure Kit is LPX100 CPS250M Page 17 Note: All dimensions in inches (mm).

18 Connector Definitions CPS250M Page 18 AC Input Connector J5 Pin 1 Line Pin 3 Neutral Mounting Holes PE Output Connector J0 (12V Variant) Barr1 Main Output Barr2 Main Output Return Output Connector J0 (Other Variants) Pin 13 Main Output Return Pin 46 Main Output 12V Fan Supply Header J2 Pin 1 Fan Return Pin 2 Fan Voltage Control Signal Header CPS253M1 only Pin 1 5Vdc Standby Pin 2 Standby Return Pin 3 Remote Inhibit Pin 4 DC OK Pin 5 VFB (feedback loop pin)

19 Power / Signal Mating Connectors and Pin Types CPS250M Page 19 Table 4. Mating Connectors for CPS250M Reference J5: AC Input Mating Connector Molex or equivalent(housing); Molex (crimp); AWG 2018 wires. J0: DC Output (12V Variant) Ring terminal: Tyco or KST RV34 or equivalent. J0: DC Output (24V, 48V Variants) J2: Fan Output J403: Control Signals (CPS253 M1 models only) Molex or equivalent (housing); Molex (crimp); AWG 2018 wires. Cvilux CI0102S0000 (housing); CI01T01MPP0 (crimp); AWG 3024 wires. Molex (housing); Molex (crimp); AWG 3026 wires.

20 Potentiometer Definitions VR1 Vo Output Adjust CPS250M Page 20 VR2 OCP Limit Adjust

21 Environmental Specifications CPS250M Page 21 EMC Immunity CPS250M series power supply is designed to meet the following EMC immunity specifications: Table 5. Environmental Specifications: Document Description EN ESD up to 15KV air contact, 8KV contact discharge, Criteria A, no enclosure preferred, but with LPX100 enclosure if necessary. EN Radiated Immunity 10V/m, Criteria A. EN Electrical Fast Transients level 3 minimum, 100kHz rate, Criteria A. EN Surge level 3 minimum, Criteria A. EN Radio frequency common mode, Levels 3V (rms), Modulated AM 80%, 1 khz, 150 ohm source impedance, Criteria A. EN Power Frequency Magnetic Immunity, 30 A/m, Criteria A. EN AC Input transients [Reference EN :2001] 1 Condition Criteria >95% dip, 0.5 period A, 225W 60% dip, 5.0 periods B (A when Vin >230 Vac, 225W) 30% dip, 25 periods B (A when Vin >130 Vac) >95% dip, 5 Secs B Note 1 For conditions where Criteria A cannot be met, characterize the boundary condition (Line and/or Load) where Criteria A becomes Criteria B. Ringwave Test 3KV at 200A, per ANSI , Criteria A.

22 Safety Certifications CPS250M Page 22 The CPS250M series power supply is intended for inclusion in other equipment and the installer must ensure that it is in compliance with all the requirements of the end application. This product is only for inclusion by professional installers within other equipment and must not be operated as a stand alone product. The CPS250M series power supply has been designed in accordance with following safety standards. Appropriate safety certificates and approvals are available to download from our website Table 6. Safety Certifications for CPS250M Document ES CSA C22.2 No M90 EN UL CSA C22.2 No EN CE Mark CCC / CQC IEC Description 2 x MOPP and BF rated, Safety of medical electric Equipment. 2 x MOPP and BF rated, Medical Equipment. 2 x MOPP and BF rated, European Community Safety investigated and marketed by TUV or VDE. US and Canada Safety Requirements of Information Technology Equipment, including electrical business equipment. Canada Safety Requirements of Information Technology Equipment, including electrical business equipment. European Community Safety investigated and marketed by TUV or VDE. LVD China Safety Approval Audio/Video Information Technology and Communication Technology Equipment (CPS253M1 only)

23 EMI Emissions CPS250M Page 23 The CPS250M series power supply has been designed to comply with the Class B limits of EMI requirements of EN55022 (FCC Part 15) and CISPR 22 (EN55022) for emissions and relevant sections of EN61000 (IEC 61000) for immunity. Conducted Emissions The power supply is tested under worst case conditions or AC input voltage, frequency and load conditions. The power supply will meet the following requirements with 6 db margin across the frequency range; when tested on a wooden bench. This will be met with the output common floating or connected to ground. Additionally for single models the positive output connected to ground (operated as a negative output). For class II operation, conducted EMI tested without ground plane or metal enclosure but all earth connection needs to be interconnected to meet class A limit. Table 7. Conducted EMI emission specifications of the CPS250M Parameter Model Symbol Min Typ Max Unit FCC Part 15, class B All Models Margin 6 db CISPR 22 (EN55022) class B All Models Margin 6 db Radiated Emissions For appliance IEC protection Class I operation, CPS250M series power supply meet Class A and B conducted and radiated EMI with ground plane LPX100 metal enclosure. For appliance IEC protection Class II operation, Radiated EMI tested with ground plane to meet class A limit. Please refer to below for earth connections.

24 Operating Temperature CPS250M Page 24 The CPS250M series power supply will start and operate within stated specifications at an ambient temperature from 20 O C to 50 O C. Free Air Convection Cooling The total output power rating is 155W under freeair convection cooling at 50 O C and nominal input voltage ranges of 100 to 264 Vac. Below 100 Vac and up to 50 O C, output current and power derates by 1% / Vac. Above 50 O C the freeair convection rated power shall be derated at 2.5% / O C for input line voltage of 100 to 264 Vac. Above 50 O C the freeair convection rated power shall be derated at 2.9% / O C up to 70 O C for input line voltage of Vac. AC Input (Vac) Output Power (W) Ambient Temperature ( O C) Figure 35: Qualified airflow direction for natural convection cooling

25 Forced Air Cooling CPS250M Page 25 The total output power rating is 250W under forcedair cooling at 50 O C and nominal input voltage ranges of 100 to 264 Vac. Below 100 Vac, and up to 50 O C, output current and power derates at 1% / Vac. The PSU shall be characterized with 4 airflow directions as shown in Figure 36 below. Airflow directions 1, 3 and 4 require 10 CFM (see table below for LFM conversion). Airflow direction 2 requires higher LFM of 300 (12CFM). The airflow required shall be evaluated using a tunnel with cross sectional dimensions of 3.5 x 1.65 for Airflow directions 1 and 2, and 5.5 x 1.65 for Airflow directions 3 and 4. The power supply have safety approval at these various conditions. Air flow direction CFM LFM 1 10 CFM 250 LFM 2 12 CFM 300 LFM 3 / 4 10 CFM 160 LFM At ambient above 50 O C the forcedair rated power shall be derated at 1.9% / O C up to 70 O C. AC Input (Vac) Output Power (W) Ambient Temperature ( O C) Figure 36 Airflow Direction

26 Derating conditions for AC input are summarized in Figures 37 and 38. CPS250M Page 26 Figure 37 Derated Output Power vs. Input AC voltage Figure 38 Derated Output Power vs. Ambient Temperature The power supply derating under DC input conditions is the same as for AC input conditions, except 127 Vdc replaces 90 Vac, 140 Vdc replaces 100 Vac and 370 Vdc replaces 264 Vac. This is summarized in Figure 39 below. Figure 39 Derated Output Power vs. Input DC voltage

27 Free Air Convection Rating with Chassis (LPX100 enclosure) CPS250M Page 27 The total output power rating is 155W under freeair convection cooling at 35 O C and nominal input voltage ranges of 100 to 264 Vac. Above 35 O C the freeair convection rated power shall be derated at 1.72 % / O C for input line voltage of 100 to 264 Vac. AC Input (Vac) Output Power (W) Ambient Temperature ( O C) Forced Air Rating with Chassis (LPX100 enclosure) The total output power rating is 250W under forcedair cooling at 50 O C and nominal input voltage ranges of 100 to 264 Vac. Above 50 O C output power shall be derated at 1.9 % / O C up to 70 O C with at least 12 CFM forced air cooling. AC Input (Vac) Output Power (W) Ambient Temperature ( O C)

28 Storage and Shipping Temperature / Humidity CPS250M Page 28 The CPS250M series power supply can be stored or shipped at temperatures between 40 O C to +85 O C and relative humidity from 5% to 95% noncondensing. Altitude The CPS250M series power supply will operate within specifications at altitudes up to 5,000 meters above sea level for ITE and 3000 meters for medical over allowable temperature range with thermal derating. The power supply will not be damaged when stored at altitudes of up to 16,000 meters above sea level over allowable temperature range. Humidity The CPS250M series power supply will operate within specifications when subjected to a relative humidity from 5% to 90% noncondensing. The CPS250M series power supply can be stored in a relative humidity from 5% to 95% noncondensing. Vibration The CPS250M series power supply pass the following vibration specifications: Operating Random Vibration Acceleration 4.0 grms Frequency Range 8200 Hz Sweep Rate 1 oct / min Direction Levels 3 mutually perpendicular axis AMP/DISP Frequency Notes 2G s 8200Hz X, Y, Z axis 4G s Hz X, Y, Z axis Shock The CPS250M series power supply pass the following shock specifications: Operating HalfSine Shock Acceleration 30 G Duration 11 msec Pulse No. of Shock HalfSine 3 positive and 3 negative pulses in each X, Y, Z axis

29 Power / Control Signal Interface Descriptions CPS250M Page 29 Main Output (J0) 12V variant Bus Bar connector provide the main output for the CPS253M power supply. The Output Voltage and the Power Ground terminals are the positive and negative rails respectively of the main output of the CPS253M power supply. The Main Output is isolated from the Earth Ground and can be operated as a positive or negative output. Main Output (J0) 24, 48V variants These terminals provide the main output for the CPS255M / CPS258M power supplies. The Main Output is isolated from the Earth Ground and can be operated as a positive or negative output. Pin 13 Main Output Return Pin 46 Main Output

30 Main Output Voltage Adjustment (VR1) CPS250M Page 30 The main output of the CPS250M series can be adjusted by 0%~+10% from its nominal output voltage. The adjustment potentiometer is VR1. The potentiometer is sealed singleturn. Please refer to table below for maximum output load setting beyond nominal output voltage during forced air conditions. Trim% Max Output Power (W) % % 200 Over Current Protection Trimpot (VR2) A full power of 250W is allowed if the OCP trimpot (location VR2) is turned fully clockwise. If the OCP trimpot is turned fully counterclockwise, only 155W is allowed. Output power of 155W is intended for Convection cooling, while 250W is intended for Forced Air cooling. If the OCP trimpot is set at Convection Power and 250W is loaded, the unit will either protect through OCP, SCP or OTP which depends on the loading profile. The OCP settings cannot be adjusted on the fly. It is required to recycle AC before new OCP settings can take effect. It is advisable to turn off the PSU before accessing the trimpot for end user safety.

31 12V Fan Supply (J2) CPS250M Page 31 The CPS250M series power supply contains a separate 12V output for powering a cooling fan. This 12V Fan Supply is provided in 2pin connector J2. The main output and fan output have common ground connection. Pin 1 Fan Return Pin 2 Fan Voltage Monitoring And Control Signals (J403) For CPS253M1 only The CPS253M1 contains a 5 pins control signal header providing monitoring and control signals. 5V Standby Output, Standby Output Return (Pin 1 and Pin 2) 5V Standby Output at 100mA is provided on the CPS253M1 only. Remote Inhibit (Pin 3) Remote inhibit will require Pin 3 of J403 to be grounded to Pin2. Low voltage will also inhibit the power supply. Low is <0.8V and high is 2.0V, source current 1mA maximum. Left the inhibit pin open will enable the power supply. DCOK (Pin 4) It is a TTL logic signal that goes high 50150ms after output is in regulation. It goes low when the output goes out of regulation VFB (feedback loop pin) (Pin 5) This pin is an access to the Voltage loop error amp voltage feedback input and can be used for active current sharing purpose. Pulling this pin closer to output return will increase the output voltage. Maximum level that Vo can reach is around 8% typical when this pin is fully grounded.

32 Output Ripple and Noise Measurement CPS250M Page 32 The setup outlined in the diagram below has been used for main output voltage ripple and noise measurements on the CPS250M series. When measuring output ripple and noise, a scope jack in parallel with a 0.1uF ceramic chip capacitor, and a 10 uf aluminum electrolytic capacitor should be used. Oscilloscope should be set to 20 MHz bandwidth minimum for this measurement. For all valid static conditions of line and load, the main output ripple is no more than 1% of the output voltage from 0 to70 O C. Please refer to table below for minimum load required to meet 1% ripple requirement. Please refer to table below for minimum load required to meet 1% ripple requirement. No ripple issue at absolute no load. Output Ripple Spec #1 Output Ripple Spec #2 Model Max. Limit Min. Load Max. Limit Min. Load CPS253M / M1 1% 6W 2.5% 50300mA CPS255M 1% 6W 1.5% 50200mA CPS258M 1% 6W 1.5% 50150mA Note: For CPS258M, a minimum of 330uF system capacitance is required to meet 1% ripple for operation at ambient temperature 10 O C and below. The maximum output voltage trim that can meet 1% ripple is up to +5% only.

33 Record of Revision and Changes CPS250M Page 33 Issue Date Description Originators First Issue E. Wang Update Fan Output Description E. Wang Update Input Startup & Undervoltage Lockout Voltage E. Wang Update Performance Curves E. Wang For more information: For support: