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| TECHNICAL DATASHEET Rev. A SPW48S24-100 100W DC-DC Converter 18-75 Vdc Input 24Vdc Output at 4.16A Half-Brick Package Features: * 84% Efficient at Full Load * Fast Transient Response * Operation to No Load * Output Trim +/-10% * Remote ON/OFF (Active High/Low) * Remote Sense Compensation * Delivers a Continuous 50W at 25C with No Air * * * * * * * * * Low Output Ripple Fixed Switching Frequency Output Over Current Protection Output Short Circuit Protection Over Temperature Protection 1500 V Isolation 100% Burn In Test Board Available UL 1950 Listed - CE Mark Description: The SPW series is a high-density half brick converter that incorporates the desired features required in today's demanding applications. When performance, reliability, and low cost are needed, the SPW series delivers. (888) 597-WALL www.wallindustries.com 1 of 13 WALL INDUSTRIES, INC. Technical Specifications Rev A TECHNICAL DATASHEET SPW48S24-100 All specifications are based on 25o C, Nominal Input Voltage and Maximum Output Current unless otherwise noted. We reserve the right to change specifications based on technological advances. Related condition Min Nom Max SPECIFICATION Switching Frequency 350 INPUT (Vin) Operating Voltage Range UVLO Turn On at UVLO Turn Off at UVLO Hysterisis Maximum Input Current (Graph 3) No Load Input Current (Graph 5) Input Current under "Remote Off" (Graph 6) Reflected Ripple Current (Photo 2, Fig. 4) Input Surge Voltage EFFICIENCY (Graph 1) OUTPUT (Vo) Voltage Set Point Voltage Adjustment (Table 1) Load Regulation Line Regulation Temperature Drift Remote Sense Compensation Ripple (Photo 8) Spikes (Photo 8) Current Current Limit Over Voltage Limit DYNAMIC RESPONSE Load step / V (Photo 7) Recovery Time (Photo 7) Turn On Delay (Photo 5) Turn On Overshoot (Photo 3,5) Hold Up Time (Photo 4,6) REMOTE ON/OFF Remote ON - Active High Remote OFF - Active High Remote ON/OFF pin Floating - Active High ION/OFF Sink to pull low - Active High Remote ON - Active Low Remote OFF - Active Low Remote ON/OFF pin Floating - Active Low ION/OFF Sink to pull low - Active Low ION/OFF Source to drive high - Active High or Low Turn On Delay - (Photo 3) Turn Off Delay - (Photo 4) ISOLATION Input-Output Isolation Resistance Isolation Capacitance THERMAL Ambient (Graph 2) Over Temperature Protection Storage Temperature MTBF MECHANICAL Weight 18 16.5 15.5 23.76 -1% 21.6 -10% 0 28.5 50% to 100% Io Recovery to within 1% Nominal Vout From Vin (min) to Vout (nom) Full Load Resistive From Vin (min) to VULVO_Turn_Off 0 Active High or Active Low (Add an `R' to the end of the PN Min High to Enable 2.5 Max Low to Disable Over Operating Voltage Range 2.0 VON/OFF =0V, Vin=75V Max Low to Enable Min High to Disable 2.0 Over Operating Voltage Range 3.0 VON/OFF =0V, Vin=75V Enabled Disabled 1 minute 1500 10 -40 -55 48 17 16 1 7.0 0.060 1 20 84 24.0 5.0 0.05 0.05 0.01 40 40 5.83 30 75 17.5 17 100 24.24 +1% 26.4 +10% 0.1 0.1 0.02 0.5 360 360 4.167 31.5 Model No. SPW48S24-100 Unit KHZ Vdc Vdc Vdc Vdc A A mA mA Vdc % Vdc % Vdc % % % / oC Vdc mV p-p mV p-p A A Vdc Low Line No Load With L-C filter as shown in Fig. 4. 100 mS Io=4.16A Sense shorted to Vout Max Output limited to 100W Sense shorted to Vout Sense shorted to Vout Max Output limited to 100W (as measured at the converter output pins) 0.1uF Ceramic & 10uF Tantalum 0.1uF Ceramic & 10uF Tantalum Power Limited-Dependent upon SENSE compensation and TRIM adjustment 400 mV 0.1 mS 250 mS 0.0 % mS ie: SPW48S24-100R) Vdc 1.3 Vdc 6.3 Vdc 1.0 mA 0.8 Vdc Vdc 5.4 1 mA mA 240 mS 10 uS 2200 Vdc G pF C C o C Hours o o Max. Ambient limited by Derating Curves (Graph 2) Calculated Using Bellcore TR-332 Method 1 case 3 Graph 2 25 110 125 2,485,707 See Figure 1 100 - g (888) 597-WALL www.wallindustries.com Page 2 of 13 WALL INDUSTRIES, INC. Figure 1: Mechanical Dimensions Rev A TECHNICAL DATASHEET SPW48S24-100 (888) 597-WALL www.wallindustries.com Page 3 of 13 WALL INDUSTRIES, INC. DESIGN CONSIDERATIONS Under Voltage Lock Out (UVLO) Rev A TECHNICAL DATASHEET SPW48S24-100 The converter output is disabled until the input voltage exceeds the UVLO turn-on limit. The converter will remain ON until the input voltage falls below the UVLO turn-off limit. Over Current Protection The converter is internally protected from short circuit and over current conditions. During these fault conditions, the converter output will `hiccup'. The converter output will recover once the short or over current fault is removed. Over Temperature Protection The converter is protected from over temperature conditions. Upon exceeding this temperature, the converter will shut down. The converter will automatically recover once the over temperature condition is removed. Input Filter No additional input capacitor is needed for the power supply to operate. However, to reduce the input ripple voltage and current beyond what is seen in Photo 1, additional capacitance may be added across the input (see Photo 2). No inductor should be placed between the capacitor and the input to the converter without a termination capacitor ("Cin" Fig. 4). Output Filter No additional output capacitor is needed for the power supply to operate. However, to reduce the ripple and noise on the output, additional capacitance may be added. Usually, a 0.1uF X7R capacitor works best for reducing H.F.spike noise. Also, capacitance in the form of a tantalum or aluminum electrolytic capacitor may also be placed across the output in order reduce base ripple, and improve the transient peak-to-peak voltage deviation. Remote Sense To improve the regulation at the load, route the connections from the -Sense and the +Sense pins to the -Vout and +Vout connections AT the load. This will force the converter to regulate the voltage at the load and not at the pins of the converter (refer to Graph 9). If it is not desired to use the Remotes Sense feature, the -Sense and +Sense pins should be shorted to the -Vout and +Vout pins respectively. Shorting the Sense pins to the Vout pins will reduce the voltage drops through the converter pins. Fusing It is required that the input to the converter be supplied with a maximum 10 A, 250 V rated fuse. Safety The SPW series is CE marked and certified by the following: UL1950 ,CUL950, TUV60950 FILE 155800. The isolation provided by the SPW series is a Basic insulation in accordance with EN60950. SELV output reliability is maintained only if the input to the SPW converter is a SELV source. Remote ON/OFF The converter has the ability to be remotely turned ON or OFF. The SPW series may be ordered Active-High or Active-Low (place an option `R' at the end of the part number). Active-High means that a logic high or open at the ENABLE pin will turn ON the supply. With Active-High, if the ENABLE pin is left floating, the supply will be enabled. Active-Low means that a logic low at the ENABLE pin will turn ON the supply. With Active-Low, if the ENABLE pin is left floating, the supply will be disabled. If remote On/Off is not used on an Active-Low supply, short the Enable pin to -Vin. Figure 2. Remote (L/E) (888) 597-WALL www.wallindustries.com Page 4 of 13 WALL INDUSTRIES, INC. Output Voltage Trim Rev A TECHNICAL DATASHEET SPW48S24-100 The following information is provided to allow quick calculation of the trim resistor value for a desired output voltage. The general procedure for calculating a trim resistor is as follows: 1. Determine the desired output voltage (Vo) 2. Select Equation. (Trim Low/Trim High) 3. Use the data in Table 1 to complete the equation. 4. Evaluate. In order to trim low use Equation 1 and Table 1 to calculate resistor RTL for the desired output voltage. Equation 1: Trim Low Vo - VREF RTL = V - RLIM REF 1 ( RL ) - ( RH (Vo - VREF )) Vo - Desired output voltage. All resistor values in K ohms. Schematic 1: Trim Low In order to trim high use Equation 2 and Table 1 to calculate resistor RTH for the desired output voltage. Equation 2: Trim High RTH = ( VREF Vo -VREF RH )-( ) VREF RL - R LIM Vo - Desired output voltage. All resistor values in K ohms. Schematic 2: Trim High MODEL (Output Voltage) 3.3V 5.0V 12.0V 15.0V 24.0V RH (K OHMS) RLIM (K OHMS) RL (K OHMS) VREF (VOLTS) 0.750 2.49 9.53 12.4 21.5 0.499 10.0 13.7 13.7 15.4 2.32 2.49 2.49 2.49 2.49 2.495 2.495 2.495 2.495 2.495 Table 1 : Trim Low/High Data Table. (888) 597-WALL www.wallindustries.com Page 5 of 13 WALL INDUSTRIES, INC. Note: Output trim +/- 10% max. Rev A TECHNICAL DATASHEET SPW48S24-100 Graph 1: SPW48S24-100 Efficiency vs. Output Current 90% 85% Effiency (%) 80% Vin=36V 75% Vin=48V Vin=60V Vin=75V 70% 0.833 1.666 2.499 Io (A) 3.332 4.165 Graph 2: SPW48S24-100 Max Ambient vs. Io 4.00 3.50 3.00 2.50 Io (A) 2.00 1.50 1.00 0.50 0.00 -40 -30 -20 -10 0 10 20 Ambient (C) 30 40 50 60 70 400 LFM 300 LFM 200 LFM 100 LFM 0 LFM Note: When trimming the output high, Io vs. Ambient is derated by power. ie: from Graph 2, find the maximum current at the desired ambient and airflow, and multiply this current by the nominal voltage (24V) to get the maximum power. Divide this power by the desired trimmed high voltage to get the maximum current at that ambient. When trimming low, the maximum current stays the same as shown in graph 2. (888) 597-WALL www.wallindustries.com Page 6 of 13 WALL INDUSTRIES, INC. Graph 3: SPW48S24-100 Input Current vs. Input Voltage 8.0 7.5 7.0 6.5 6.0 5.5 5.0 Iin (A) 4.5 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0.0 15 20 25 30 35 40 45 50 Vin(V) 55 60 65 70 75 Io=0A Io=1.04A Io=2.08A Io=3.12A Rev A TECHNICAL DATASHEET SPW48S24-100 Graph 4: SPW48S24-100 Power Dissipation vs. Input Voltage 30 Io=0A Io=3.12A Io=1.04A Io=4.16A Io=2.08A 25 Pdissipation (W) Io=4.16A 20 15 10 5 0 15 20 25 30 35 40 45 V in(V) 50 55 60 65 70 75 Graph 5: SPW48S14-100 No Load Input Current and Power Dissipation vs. Input Voltage 0.25 4 Graph 6: SPW48S24-100 "Remote Off" Input Current and Power Dissipation vs. Input Voltage 3.0 250 0.20 Input Current Power Dissipation 3 2.5 200 3 2.0 Pdissipation (mW) 0.15 Iin (A) Iin (mA) 2 150 1.5 100 1.0 1 0.05 1 0.5 Input Current Power Dissipation 0.00 15 20 25 30 35 40 45 50 55 60 65 70 75 Vin(V) 0 0.0 15 20 25 30 35 40 45 50 55 60 65 70 75 Vin(V) 0 50 Pdissipation (W) 0.10 2 Note: Voltage measurements taken where the output pins are soldered into test board. (888) 597-WALL www.wallindustries.com Page 7 of 13 WALL INDUSTRIES, INC. Rev A TECHNICAL DATASHEET SPW48S24-100 Photo 1: Input Ripple Voltage(1) and Current-500mA/Div.(2). Vin=48V, Iout = 4.16A Photo 2: Input Ripple Voltage(1) and Current-20mA/Div. (2). Vin=48V, Iout = 4.16A With an L-C filter across the Input (Fig. 4) Photo 3: Remote Turn ON (Chan 1=Enable, Chan 2=Vout) Vin=48V, Iout = 4.16A Photo 4: Remote Turn OFF (Chan 1=Enable, Chan 2=Vout) Vin=48V, Iout = 4.16A (888) 597-WALL www.wallindustries.com Page 8 of 13 WALL INDUSTRIES, INC. Rev A TECHNICAL DATASHEET SPW48S24-100 Photo 5: Normal Turn ON (Chan 1=Vin, Chan 2=Vout) Vin=48V, Iout = 4.167A Photo 6: Normal Turn OFF (Chan 1=Vin, Chan 2=Vout) Vin=48V, Iout = 4.167A Photo 7: Transient Response 50% to 100% Vin=48V, Iout = 4.167A to 2.08A Cout=0.1uF Ceramic + 10uF Tantalum Photo 8: Output Voltage Ripple (20 MHz BW) Vin=48V, Iout= 4.16A Cout=0.1uF Ceramic + 10uF Tantalum (888) 597-WALL www.wallindustries.com Page 9 of 13 WALL INDUSTRIES, INC. Rev A TECHNICAL DATASHEET SPW48S24-100 TEST SETUP: The SPW48S24-100 specifications are tested with the following configurations: Regulation and Efficiency Setup To ensure that accurate measurement are taken, the voltage measurements are taken directly at the terminals of the module. This minimizes errors due to contact and trace lengths between the load and the output of the supply. The following diagram is of the test setup. Figure 2: Regulation and Efficiency Probe Setup Output Ripple Voltage Setup The module is tested with a 0.1uF ceramic capacitor in parallel with a 10uF tantalum capacitor across the output terminals. Unless otherwise specified, bandwidth is limited to 20MHZ. Figure 3: Ripple Voltage Probe Setup (888) 597-WALL www.wallindustries.com Page 10 of 13 WALL INDUSTRIES, INC. Rev A TECHNICAL DATASHEET SPW48S24-100 Input Reflected Ripple Current and Input Ripple Voltage Setup The module is tested for input reflected ripple current (Irrc). The input ripple voltage is also measured at the pins with and without an additional 33uF electrolytic capacitor. To reduce either the input ripple current or voltage additional capacitors and/or an inductor may be added to the input of the converter. Figure 4: Ripple Current Setup Converter Thermal Consideration The converter is designed to operate without convective cooling if the de-rating curves are followed. The converter can operate at higher temperatures and higher output currents if airflow and or a heatsink is applied. Airflow should be aligned lengthwise to the converter's heatsink fins for optimum heat transfer. See Graph 2 for de-rating curves or contact factory for additional thermal information. Figure 5: Airflow Orientation (888) 597-WALL www.wallindustries.com Page 11 of 13 WALL INDUSTRIES, INC. Rev A TECHNICAL DATASHEET SPW48S24-100 Paralleling Converters The SPW series converters may be paralleled both for redundancy and for higher output current. However, in order to do this, a high-current, low Vf, Schottky diode must be placed at the +Vo pin of each supply as shown in Figure 6. To improve sharing, tie the two TRIM pins together. The converters may be trimmed by adding a resistor value from Table 2 from each TRIM pin to RS pin, or alternatively, a single resistor of half the value of Table 2 from the common TRIM pins to the common RS pins. Figure 6: Paralleling Converters (888) 597-WALL www.wallindustries.com Page 12 of 13 WALL INDUSTRIES, INC. Ordering Information: Rev A TECHNICAL DATASHEET SPW48S24-100 Part Number Example: SPW 48 S 24 -100 R Series Designation Nominal Input Voltage Single Output Nominal Output Voltage Maximum Output Power Options R Leave Blank for no Options Active Low Enable Company Information: Wall Industries, Inc. has created custom and modified units for over 40 years. Our in-house research and development engineers will provide a solution that exceeds your performance requirements on time and on budget. Our ISO9001-2000 certification is just one example of our commitment to producing a high quality, well documented product for our customers. Our past projects demonstrate our commitment to you, our customer. Wall Industries, Inc. has a reputation for working closely with it's customers to ensure each solution meets or exceeds form, fit and function requirements. We will continue to provide ongoing support for your project above and beyond the design and production phases. Give us a call today to discuss your future projects. Contact Wall Industries for further information: Phone: (603)778-2300 Toll Free: (888)587-9255 Fax: (603)778-9797 E-mail: sales@wallindustries.com Web: www.wallindustries.com Address: 5 Watson Brook Rd. Exeter, NH 03833 (888) 597-WALL www.wallindustries.com Page 13 of 13 |
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