XD50-24S28-POCW Technical Specification

Transcription

1 Key Features Package: Open Frame Small footprint: in mm Product Overview These DC-DC converter modules use advanced power processing, control and packaging technologies to provide the performance, flexibility, reliability and cost effectiveness of a mature power component. High frequency Active Clamp switching provides high power density with low noise and high efficiency. Output power: 50W Wide input range: 20-60VDC High conversion efficiency: Up to 93% Line regulation to ±1% Load regulation to ±1% Fixed operating frequency Isolation voltage :1,500V Enable (ON/OFF) control Output over-voltage protection Output over-load protection Hiccup mode short circuit protection Over-temperature protection Input under-voltage lock-out Output voltage trim: ±10% Vout Applications Communications Military Industry control Railway Servers,workstations Product s Introduction The XD series is an independently regulated single output converter that uses a industry nonstandard brick package. The very high efficiency is a result of ENARGY CORP patented topology that uses synchronous rectification and an innovative construction design to minimize heat dissipation and allow extremely high power densities. The power dissipated by the converter is so low that a heat sink is not required, which saves cost, weight, height, and application effort. All of the power and control components are mounted to the multi-layer PCB substrate with highyield surface mount technology, resulting in a more reliable product. Part Numbering XD50 24S28 POCW XD Product Output Input Output Output Options Options Options Options Family Power Voltage Number Voltage (Enable) Logic ( Package) (Temperature) (Input XD 20=20W 12=12V S=Single 5=5.0V P=Positive O=Open Frame C= 55~+100 Voltage) 30=30W 24=24V D=Dual 12=12V N=Negative E=Encapsulated W=Wide 50=50W 48=48V 15=15V 28=28v PD092A V00 Page 1 of 13

2 Content 1. ELECTRIC CHARACTERISTICS Absolute Maximum Ratings Input Characteristics Output Characteristics Dynamic Response Characteristics Functional Characteristics Isolation Characteristics GENERAL CHARACTERISTICS ENVIRONMENTAL CHARACTERISTICS STANDARDS COMPLIANCE QUALIFICATION SPECIFICATION TYPICAL WAVE AND CURVES FUNCTION SPECIFICATIONS Enable (ON/OFF) Control (Pin 1) Voltage Trim (Pin 6) Protection Features TYPICAL APPLICATION AND DESIGN CONSIDERATION Typical Application Circuit Input Filtering TEST METHOD Output Ripple & Noise Test PHYSICAL INFORMATION Mechanical Outline Pin Designations PD092A V00 Page 2 of 13

3 1. Electric Characteristics Electrical characteristics apply over the full operating range of input voltage, output load and base plate temperature, unless otherwise specified. All temperatures refer to the operating temperature at the center of the base plate. All data testing at Ta=25 o C except especial definition. 1.1 Absolute Maximum Ratings 72 Vdc Continuous, non-operating Input Voltage 65 Vdc Continuous, operating 72 Vdc Operating transient protection,<100ms Isolation Voltage 2,000 Vdc Input to Output Operating Temperature Storage Temperature Enable to Vin- Voltage Vdc 1.2 Input Characteristics Input Voltage Range Vdc Continuous Under-Voltage Lockout Vdc Turn-on Threshold Vdc Turn-off Threshold Maximum Input Current 3.2 A Full load;20vdc Input Efficiency 92 % Figures 1-4 Dissipation W Min. load Disabled Input Current 5 ma Enable pin low Recommend External Input Capacitance 100 µf Typical ESR Ω 1.3 Output Characteristics Output Voltage Set point Vdc Nominal input; No load Output Voltage Range Vdc Output Current Range A Subject to thermal derating; Figures 5-8 Line Regulation ±0.2 ±1 % Low line to high line; full load Load Regulation ±0.2 ±1 % No load to full load; nominal input Temperature Regulation ±0.002 ±0.02 % / C Over operating temperature range Current Limit 2.2 A Output voltage 95% of nominal Short Circuit Current A Output voltage <250 mv Ripple (RMS) 75 mv Nominal input; full load; 20 MHz Noise(Peak-to-Peak) 100 mv bandwidth; Figure 13 Maximum Output Cap µf Nominal input; full load Output Voltage Trim % Nominal input; full load PD092A V00 Page 3 of 13

4 1.4 Dynamic Response Characteristics Change In Output Current (di/dt= 0.1A/µs) Change In Output Current (di/dt= 2.5A/µs) 800 mv 50% to 75% to 50% Iout max, Figure mv 50% to 75% to 50% Iout max, Figure 12 Settling Time 300 µs To within 1% Vout nom. Turn-on Time 5 ms Full load; Vout=90% nom. Figure 9 Shut-down Fall Time 2 ms Full load; Vout=10% nom. Figure 10 Output Voltage Overshoot 5 % 1.5 Functional Characteristics Switching Frequency KHz Regulation stage and Isolation stage Trim(Pin6) Output Voltage Trim See part 7.2 Voltage Trim(Pin6) 10 % Trim Up, Trim Pin to Com. 8 % Trim Down, Trim Pin to Vout(+). Enable(ON/OFF)Control(Pin1) See part 7.1 Enable Voltage Enable Source Current Enable (ON/OFF) control Positive Logic 15 Vdc Enable pin floating 1 ma Vdc On-Control, Logic high or floating Vdc Off-Control, Logic low Over-Load Protection 120 % Over-Load Protection 120 % Short-Circuit Protection 65 mω Current-Mode, Pulse by Pulse Current Limit Threshold,(%Rated Load) Type: Hiccup Mode, Non-Latching, Auto-Recovery,Threshold,Short-Circuit Resistance 1.6 Isolation Characteristics Isolation Voltage 1,500 Vdc Input to Output 1,500 Vdc Input to Base 500 Vdc Input to Base Isolation Resistance 10 MΩ Isolation Capacitance 1,000 pf At 500VDC to test it when atmospheric pressure and R.H. is 90% PD092A V00 Page 4 of 13

5 2. General Characteristics Weight 0.88(25) Oz (g) Open Frame TR-NWT ; 80% load,300lfm, MTBF ( calculated ) 1 MHrs 40 Ta 3. Environmental Characteristics Operating Temperature Extended, base PCB temperature Storage Temperature Ambient Temperature Coefficient ±0.02 %/ Humidity %R.H. Relative Humidity, Non - Condensing 4. Standards Compliance Parameter UL/cUL60950 EN60950 GB4943 Needle Flame Test (IEC ) IEC Notes Test on entire assembly; board & plastic components UL94V-0 compliant 5. Qualification Specification Parameter Vibration Mechanical Shock Cold(in operation) Damp heat Temperature Cycling Power/Thermal Cycling Design Marginality Life Test Solderability Notes 10-55Hz sweep, 1 min./sweep, 120 sweeps for 3 axis 100g min, 2 drops in x and y axis, 1 drop in z axis IEC Ad IEC Cy -40 C to 100 C, ramp 15 C/min., 500 cycles Vin = min to max, full load, 100 cycles Tmin-10 C to Tmax+10 C, 5 C steps, Vin = min to max, 0-105% load 95% rated Vin and load, units at derating point, 1000 hours IEC PD092A V00 Page 5 of 13

6 6. Typical Wave And Curves Efficiency(%) Vin 24Vin 60Vin Load Current(A) Efficiency(%) C 40 C 55 C Air Flow (LFM) Figure 1: Efficiency at nominal output voltage vs. load current for minimum, nominal, and maximum input voltage at 25 C. Figure 2: Efficiency at nominal output voltage and 60% rated power vs. airflow rate for ambient air temperatures of 25 C, 40 C, and 55 C (nominal input voltage). Power Dissipation(W) Vin 24Vin 60Vin Load Current(A) Power dissipation (W) Air Flow (LFM) 25 C 40 C 55 C Figure 3: Power dissipation at nominal output voltage vs. load current for minimum, nominal, and maximum input voltage at 25 C. Figure 4: Power dissipation at nominal output voltage and 60% rated power vs. airflow rate for ambient air temperatures of 25 C, 40 C, and 55 C (nominal input voltage). PD092A V00 Page 6 of 13

7 Load(A) LFM(2.0m/s) 300LFM(1.5m/s) 200LFM(1.0m/s) 100LFM(0.5m/s) 0LFM(0m/s) Ambient Air Temperature( C) Figure 5: Maximum output power derating curves vs. ambient air temperature for airflow rates of 0 LFM through 400 LFM with air flowing from pin 1 to pin 3 (nominal input voltage). Figure 6: Thermal plot of converter at full load current (50W) with 25 C air flowing at the rate of 200 LFM. Air is flowing across the converter from pin 1 to pin 3 (nominal input voltage). Load(A) LFM(2.0m/s) 300LFM(1.5m/s) 200LFM(1.0m/s) 100LFM(0.5m/s) 0LFM(0m/s) Ambient Air Temperature( C) Figure 7: Maximum output power-derating curves vs. ambient air temperature for airflow rates of 0 LFM through 400 LFM with air flowing from input to output (nominal input voltage). Figure 8: Thermal plot of converter at full load current (50W) with 25 C air flowing at the rate of 200 LFM. Air is flowing across the converter from input to output (nominal input voltage). PD092A V00 Page 7 of 13

8 Figure 9: Turn-on transient at full load (resistive load) (10 ms/div).input voltage pre-applied. Ch 1: Vout (20V/div).Ch 2: ON/OFF input(500mv/div) Figure 10: Shut-down fall time at full load (10 ms/div). Ch 1: Vout (20V/div).Ch 2: ON/OFF input (500mV/div). Figure 11: Output voltage response to step-change in load current (50%-75%-50% of Iout(max); di/dt = 0.1A/μs). Load cap: 10μF, 100 mω ESR tantalum capacitor and 1μF ceramic capacitor. Ch 1: Vout (500mV/div). Figure 12: Output voltage response to step-change in load current (50%-75%-50% of Iout(max): di/dt = 2.5A/μs). Load cap: 470μF, 30 mω ESR tantalum capacitor and 1μF ceramic cap. Ch 1: Vout (500mV/div). Figure 13: Output voltage ripple at nominal input voltage and rated load current (20mV/div). Load capacitance: 1μF ceramic capacitor and 10μF tantalum capacitor. Bandwidth: 20 MHz. PD092A V00 Page 8 of 13

9 7. Function Specifications XD50-24S28-POCW Technical Specification 7.1 Enable (ON/OFF) Control (Pin 1) The Enable pin allows the power module to be switched on and off electronically. The Enable (On/Off) function is useful for conserving battery power, for pulsed power application or for power up sequencing. The Enable pin is referenced to the -Vin. It is pulled up internally, so no external voltage source is required. An open collector (or open drain) switch is recommended for the control of the Enable pin. When using the Enable pin, make sure that the reference is really the -Vin pin, not ahead of EMI filtering or remotely from the unit. Optically coupling the control signal and locating the opto coupler directly at the module will avoid any of these problems. If the Enable pin is not used, it can be left floating (positive logic) or connected to the -Vin pin (negative logic).figure A details five possible circuits for driving the ON/OFF pin. Figure B is a detailed look of the internal ON/OFF circuitry. Figure A: Various circuits for driving the ON/OFF pin. Figure B: Internal ON/OFF pin circuitry 7.2 Voltage Trim (Pin 6) Output voltage can be adjusted up or down with an external resistor. There are positive trim logic and negative trim logic available. For positive logic, the output voltage will increase when an external trimming resistor is connected between the Trim and Com pin. The output voltage will decrease when an external trimming resistor is connected between Trim and Vout(+) pin. A multi-turn 20Ký trim pot can also be used to adjust the output voltage up or down.(figure C & D). Output Trim Trim-Up Trim Pin to Com Trim-Down Trim Pin to Vout(+) Figure C: Output-voltage Trim external circuit Figure D: Trim Pot Connection. PD092A V00 Page 9 of 13

10 7.3 Protection Features Input Under-Voltage Lockout: The converter is designed to turn off when the input voltage is too low, helping avoid an input system instability problem, The lockout circuitry is a comparator with DC hysteresis. When the input voltage is rising, it must exceed the typical Turn-On Voltage Threshold value(listed on the specification page) before the converter will turn on. Once the converter is on, the input voltage must fall below the typical Turn-Off Voltage Threshold value before the converter will turn off. Output Current Limit: The maximum current limit remains constant as the output voltage drops. However, once the impedance of the short across the output is small enough to make the output voltage drop below the specified Output DC Current-Limit Shutdown Voltage, the converter into hiccup mode indefinite short circuit protection state until the short circuit condition is removed. This prevents excessive heating of the converter or the load board. Over-Temperature Shutdown: A temperature sensor on the converter senses the average temperature of the module. The thermal shutdown circuit is designed to turn the converter off when the temperature at the sensed location reaches the Over-Temperature Shutdown value. It will allow the converter to turn on again when the temperature of the sensed location falls by the amount of the Over-Temperature Shutdown Restart Hysteresis value. 8. Typical Application and Design Consideration 8.1 Typical Application Circuit 8.2 Input Filtering Figure E: Typical application circuit (negative logic unit, permanently enabled). DC-DC converters, by nature, generate significant levels of both conducted and radiated noises. The conducted noises included common mode and differential mode noises. The common mode noise is directly related to the effective parasitic capacitance between the power module input conductors and chassis ground. The differential mode noise is across the input conductors. It is recommended to have some level of EMI suppression to the power module. Conducted noise on the input power lines can occur as either differential or common-mode noise currents. The required standard for conducted emissions is EN55022 Class A (FCC Part15). (Figure F) Figure F: Input Filtering PD092A V00 Page 10 of 13

11 9. Test Method XD50-24S28-POCW Technical Specification 9.1 Output Ripple & Noise Test The output ripple is composed of fundamental frequency ripple and high frequency switching noise spikes. The fundamental switching frequency ripple (or basic ripple) is in the 100KHz to 1MHz range; the high frequency switching noise spike (or switching noise) is in the 10 MHz to 50MHz range. The switching noise is normally specified with 20 MHz bandwidth to include all significant harmonics for the noise spikes. The easiest way to measure the output ripple and noise is to use an oscilloscope probe tip and ground ring pressed directly against the power converter output pins, as shown below. This makes the shortest possible connection across the output terminals. The oscilloscope probe ground clip should never be used in the ripple and noise measurement. The ground clip will not only act as an antenna and pickup the radiated high frequency energy, but it will introduce the common-mode noise to the measurement as well. The standard test setup for ripple & noise measurements is shown in Figure G. A probe socket (Tektronix, P.N ) is used for the measurements to eliminate noise pickup associated with long ground clip of scope probes. Figure G: Ripple & Noise Standard Testing Means. PD092A V00 Page 11 of 13

12 10. Physical Information 10.1 Mechanical Outline Notes: 1. All pins are (1.02mm) dia. with 0.09 (2.2mm) dia. standoff shoulders. 2. Tolerances: x.xx ±0.02 in. (x.x ±0.5mm) x.xxx ±0.010 in. (x.xx ±0.25mm) 10.2 Pin Designations Pin No. Name Function 1 Enable TTL input to turn converter ON and OFF, referenced to Vin(-), with internal pull up. 2 Vin(-) Negative input voltage 3 Vin(+) Positive input voltage 4 Vout(+) Positive output voltage 5 Com Ground 6 Trim Output voltage trim. Leave TRIM pin open for nominal output voltage. PD092A V00 Page 12 of 13

13 Warranty All products from Enargy Corp. are guaranteed for two years from date of shipment against defects in material or workmanship when in designated use and service. This warranty does not extend to products subjected to misuse, accident, or improper application or maintenance. Enargy Corp. shall not be liable for collateral or consequential damage. This warranty is extended to the original purchaser only. EXCEPT FOR THE FOREGOING EXPRESS WARRANTY, ENARGY CORP MAKES NO WARRANTY, EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Enargy Corp. will repair or replace defective products in accordance with its own best judgment. For service under this warranty, the buyer must contact Enargy Corp. to obtain a Return Material Authorization (RMA) number and shipping instructions. Products returned without prior authorization will be returned to the buyer. The buyer will pay all charges incurred in returning the product to the factory. Enargy Corp. will pay all reshipment charges if the product was defective within the terms of this warranty. Information published by Enargy Corp. has been carefully checked and is believed to be accurate; however, no responsibility is assumed for inaccuracies. Enargy Corp. reserves the right to make changes to any products without further notice to improve reliability, function, or design. Enargy Corp. does not assume any liability arising out of the application or use of any product or circuit; neither does it convey any license under its patent rights nor the rights of others. Enargy Corp. general policy does not recommend the use of its components in life support applications wherein a failure or malfunction may directly threaten life or injury. Per Enargy Corp. Terms and Conditions of Sale, the user of Enargy Corp. components in life support applications assumes all risks of such use and indemnifies Enargy Corp. against all damages. Application Notes: A variety of application notes and technical white papers can be downloaded in pdf format from our website. ENARGY POWER (SHENZHEN) CO.,LTD. ENARGY CORP.(USA) Tel: (86) Add: 8th Floor, Block 8, South Honghualing Industry Zone, Xili, Shenzhen, China Tel: (1) Add: 16 Upton Dr, # 6 Wilmington MA USA PD092A V00 Page 13 of 13