600 Watts xppower.com QSB Series Up to 92% Efficiency Industry Standard Full Brick Package -40 C to +100 C Operating Temperature High Power Density Baseplate-cooled Remote On/Off & Remote Sense 3 Year Warranty Specification Input General Input Voltage Range 24 V (18-36 V), 48 V (36-75 V) Efficiency See tables Input Current See table Isolation Voltage 1500 VDC Input to Output 1500 VDC Input to Case Idle Current 50 mA 1500 VDC Output to Case Input Reverse Voltage None 7 Isolation Resistance 10 Protection Isolation Capacitance 4000 pF typical Input Filter Pi network Switching Frequency 48 Vin: 12 V, 28 V, 32 V: 300 kHz typical Undervoltage Lockout 24 Vin: turn on 17.0 V, turn off 16.0 V Others: 250 kHz 48 Vin: turn on 35.0 V, turn off 33.0 V DC OK Signal DC OK TTL low, not OK TTL high, connect IOC pin to Aux pin through a resistor Output (see note 3) Output Voltage Trim 60% to 110% of nominal output, see 3 Power Density 108.7 W/in application notes MTBF 381 kHrs typical to MIL-HDBK-217F Initial Set Accuracy 1.5% max at 25 C, GB Line Regulation 0.2% max measured from high line to low line Environmental Load Regulation 0.5% max measured from 0-100% load Operating Base Plate -40 C to +100 C, see derating curve Transient Response 5% max deviation, recovery to within Temperature 1% in 500 s, 25% step load change Storage Temperature -55 C to +105 C Ripple & Noise 12 V models: 120 mV pk-pk Operating Humidity Up to 90% non-condensing 28 V models: 280 mV max pk-pk 32 V models: 320 mV max pk-pk Cooling Baseplate-cooled, see derating curve 48 V models: 480 mV max pk-pk 20 MHz bandwidth (see note 1) EMC & Safety Overvoltage Protection 115-140% Emissions EN55022, level A conducted, with external Short Circuit Protection Continuous components. Contact sales for details Current Limit 110-150% nominal output Safety UL62368-1 (Pending), Thermal Shutdown Case temperature >110 C typical Evaluated to EN62368-1 Temperature 0.03%/C Coefficient Remote On/Off Isolated input, can be controlled via primary or secondary side. Module on 1-10 mA. Internal 1K resistor fitted, Module off < 1 mA or open circuit Remote Sense Compensates up to 10% of Vout nominal, total of output trim and remote sense Current Share Parallel up to 4 modules using the PC pin DC-DCDC-DC QSB600 Models & Ratings Input Current (2) Input Voltage Output Voltage Output Current Efficiency Model Number No Load Full Load 12.0 V 50.0 A 150 mA 28.09 A 89.0% QSB60024S12 28.0 V 21.5 A 150 mA 27.87 A 90.0% QSB60024S28 18-36 V 32.0 V 19.0 A 150 mA 27.84 A 91.0% QSB60024S32 48.0 V 12.5 A 200 mA 27.47 A 91.0% QSB60024S48 12.0 V 50.0 A 90 mA 13.89 A 90.0% QSB60048S12 28.0 V 25.0 A 105 mA 16.03 A 91.0% QSB60048S28 36-75 V 32.0 V 19.0 A 90 mA 13.77 A 92.0% QSB60048S32 48.0 V 12.5 A 130 mA 13.59 A 92.0% QSB60048S48 Notes 1. Output Ripple and Noise measured with 10 F tantalum and 1 F ceramic 3. The auxiliary supply output is within 7-13 V with max of 20 mA (auxiliary pin 16). capacitor across output. Ground reference is -Sense. 2. Add suffix P to the model number to receive the unit with positive logic Remote On/Off. Mechanical Details PIN CONNECTIONS 4.10 (104.1) 8- 0.04 Pin Function (1.0) 3.35 (85.1) 1 -Vin 8- 0.08 (2.0) 2 +Vin 3 -On/Off 16 15 14 13 12 11 4 +On/Off 5-7 +Vout 1 0.15 (3.81) 1.40 8-10 -Vout (35.6) 11 -Sense 2 BOTTOM VIEW 2.40 2.00 12 +Sense 1.70 (61.0) (50.8) (43.2) 13 Trim 3 2.25 14 PC 4 1.30 (57.2) (33.0) 15 IOC 4 x Mounting Holes, 3.5 mm 16 Aux 0.20 (5.1) 0.90 (22.9) Notes 4.20 (106.7) 0.75 (19.1) 1. All dimensions are in inches (mm) 2. Weight: 0.49 lbs (220 g) approx 0.22 3. Tolerances: X.XX = 0.02 (X.X = 0.5) (5.5) X.XXX = 0.01 (X.XX = 0.25) 4. Small or large pin diameter: 0.004 (0.1) 4.60 (116.8) 0.50 (12.7) 5. Small pin pitch 0.15 (3.81) Output Voltage Adjustment - QSB600 The trim pin permits the user to adjust the output voltage up or down 6.8 x 33 1.24 x according to the trim range specification (60% to 110% of nominal 6.8 + 33 R : Variable Resistor, K v output). This is accomplished by connecting resistor R between the Vf = v Rtr im: K, 6.8 k recommended 6.8 x 33 +Vout and +Sense pins and a resistor Rtrim of value 6.8k between 7.68 + Vo: Nominal Output Voltage the trim and -Sense pins. See longform datasheet for connection 6.8+ 33 diagram. The trim pin should be left open if trimming is not being Vtrim: Desired Output Voltage (Vo + R ) x Vf used. The trim resistor can be determined by the following equations: Vtrim = v Thermal Resistance Information Derating Curve Maximum Power Dissipation vs Ambient Temperature and Air Flow without heatsink 90 Natural Convection 20 ft./min. (0.1 m/s) Air Flow Rate Typical Rca 80 100 ft./min. (0.5 m/s) Natural Convection 3.82 C/W 70 20 ft. / min (0.1 ms) 200 ft./min. (1.0 m/s) 100 ft./min (0.5 ms) 3.23 C/W 60 300 ft./min. (1.5 m/s) 200 ft./min (1.0 ms) 2.71 C/W 50 300 ft./min (1.5 ms) 2.28 C/W 400 ft./min. (2.0 m/s) 400 ft./min (2.0 ms) 1.92 C/W 40 500 ft./min. (2.5 m/s) 500 ft./min (2.5 ms) 1.68 C/W 30 600 ft./min (3.0 ms) 1.50 C/W 600 ft./min. (3.0 m/s) 700 ft./min (3.5 ms) 1.35 C/W 20 700 ft./min. (3.5 m/s) 800 ft./min (4.0 ms) 1.23 C/W 10 Rca = Thermal resistance from case to ambient 800 ft./min. (4.0 m/s) 0 0 10203040 5060708090 100 Ambient Temperature ,Ta (C) 01 June 2021 Power Dissipated ,Pd (W) 0.40 (10.2) 0.90 (22.9) 0.50 (12.7) 0.20 (5.1)