Technical Specification SQ60120QPB33 36-75 V 100 V 12 V 396 W 2250 V dc Quarter-brick Input Transient Input Output Max Power Isolation DC-DC Converter The SQ60120QPB33 bus converter is a next-generation, board-mountable, isolated, fixed switching frequency dcdc converter that uses synchronous rectification to achieve extremely high conversion efficiency. The SQ BusQor series provides an isolated step down voltage from 48 V to a semiregulated 12 V intermediate bus. BusQor converters are ideal for customers who need multiple outputs and wish to build or buy point of load converters to work with a 12 V rail. RoHS Compliant (see last page). ® Operational Features • High efficiency, 94.3% at full rated load current • Delivers up to 33 A of output current (396 W power) with minimal derating SQ60120QPB33 Model • Wide input voltage range: 36-75 V, with 100 V 100 ms input voltage transient capability • Fixed frequency switching provides predictable EMI performance • No minimun load requirement • Input under-voltage lockout and over-voltage shutdown protects against abnormal input voltages • Output current limit and short circuit protection • Output over-voltage protection • Thermal shutdown Mechanical Features • • • • Protection Features Industry standard quarter-brick pin-out configuration Industry standard size: 2.30" x 1.45" (58.4 x 36.8mm) Total height: 0.50" (12.7mm) Total weight: 2.2 oz (62 g) Control Features • On/Off control referenced to input side • Inherent current share (by droop method) for high current and parallel applications. Page No. Safety Features • UL 60950-1/R2011-12 • EN60950-1/A2:2013 • CAN/CSA-C22.2 No. 60950-1/A1:2011 Product # SQ60120QPB33 Contents Phone 1-888-567-9596 Baseplated Mechanical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Standards & Qualifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Figures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Application Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 www.synqor.com Doc.# 005-0005266 Rev. G 05/13/15 Page 1 Technical Specification SQ60120QPB33 Baseplated Mechanical TOP VIEW 1.45[36,8] SIDE VIEW .600[15,24] 6 M3x.5 THREADED HOLE x3 SEE NOTES 1 & 2 5 .500 ± .034 [12,70 ± 0,86] OVERALL HEIGHT .145 [3,68] SEE NOTE 5 2.30 [58,4] 1.860 [47,24] 2.00 [50,8] .14 [3,6] 1 2 3 .033± .032 [ 0,84± 0,81 ] BOTTOMSIDE CLEARANCE 1.130[28,7] .160[4,06] .43[10,8] .220 [5,59] .300[7,62] .600[15,24] NOTES PIN DESIGNATIONS 1) M3 screws used to bolt unit's baseplate to other surfaces such as heastsink must not exceed 0.10" (2.54mm) depth below the surface of the baseplate. 2) 3) Applied torque per screw should not exceed 6in-lb (0.7nm) Pins 1-3 are 0.040" (1.02mm) Dia. with 0.080" (2.03mm) dia. standoff shoulders Pins 5-6 are 0.062" (1.57mm) Dia. with 0.100" (2.54mm) Dia. standoff shoulders Other pin extension lengths available All Pins: Material - Copper Alloy 4) 5) 6) 7) 8) 9) Pin Name 1 2 3 5 6 Vin(+) ON/OFF Vin(–) Vout(–) Vout(+) Function Positive input voltage Logic control input to turn converter on/off Negative input Negative output Positive output Finish: Matte Tin over Nickel plate Baseplate flatness tolerance is 0.004" (.10mm) TIR for surface. Undimensioned components are shown for visual reference only Weight: 2.2 oz (62 g) 10) All dimensions in inches (mm) Tolerances: x.xx +/-0.02 in. (x.x +/-0.5mm) x.xxx +/-0.010 in. (x.xx +/-0.25mm) Product # SQ60120QPB33 Phone 1-888-567-9596 www.synqor.com Doc.# 005-0005266 Rev. G 05/13/15 Page 2 Input: 36-75 V Output: 12 V Current: 33A Package: Quarter-brick Technical Specification SQ60120QPB33 Electrical Characteristics Ta = 25 °C, airflow rate = 300 LFM, Vin = 48 Vdc unless otherwise noted; full operating temperature range is -40 °C to +100 °C ambient temperature with appropriate power derating. Specifications subject to change without notice. Parameter ABSOLUTE MAXIMUM RATINGS Input Voltage Non-Operating Operating Operating Transient Protection Isolation Voltage Input to Output Operating Temperature Storage Temperature Voltage at ON/OFF input pin INPUT CHARACTERISTICS Operating Input Voltage Range Input Under-Voltage Lockout Turn-On Voltage Threshold Turn-Off Voltage Threshold Lockout Voltage Hysteresis Input Over-Voltage Shutdown Turn-On Voltage Threshold Turn-Off Voltage Threshold Maximum Input Current No-Load Input Current Disabled Input Current Input Reflected-Ripple Current Input Terminal-Ripple Current Recommended Input Fuse (see Note 1) Recommended External Input Capacitance Input Filter Component Values (L\C) OUTPUT CHARACTERISTICS Output Voltage Set Point Output Voltage Regulation Over Line Over Load Over Temperature Total Output Voltage Range Output Voltage Ripple and Noise Peak-to-Peak RMS Operating Output Current Range Output DC Current-Limit Inception Output DC Current-Limit Shutdown Voltage Back-Drive Current Limit while Disabled Maximum Output Capacitance DYNAMIC CHARACTERISTICS Output Voltage during Load Current Transient Step Change in Output Current (0.1 A/µs) Settling Time Turn-On Transient Turn-On Time Start-Up Inhibit Time Output Voltage Overshoot Product # SQ60120QPB33 Min. Typ. Max. -1 36 48 100 75 100 V V V 2250 100 125 18 V °C °C V 75 V 34.5 32 4 V V V 12.9 130 8.5 20 800.0 15 V V A mA mA mA mA A µF µH\µF 12.54 V 12.830 V V mV V -40 -45 -2 36 48 31.0 27.6 2 95 105 10 400.0 47 0.47\6.6 12.46 12.5 +0.18\-1.25 +0\-0.80 ±300 10.250 Phone 1-888-567-9596 200 50 Continuous Continuous 100 ms transient, square wave RMS through 10 µH inductor RMS, full load Fast blow external fuse recommended Typical ESR 0.1-0.2 Ω Internal values Vin = 65 V, Io = 0 A, Ta = 25 °C Over sample, line, load, temperature & life 20 MHz bandwidth; see Note 2 Full load Full load Subject to thermal derating Output voltage 10% Low 3,000 mV mV A A V mA µF 1600 250 2,500 350 mV µs 50% to 75% to 50% Iout max To within 1% Vout nom 15 200 0 30 ms ms % Full load, Vout=90% nom. -40 °C to +125 °C; Figure E 3 mF load capacitance 0 325 115 33 Units Notes & Conditions 40 10.5 50 www.synqor.com Negative current drawn from output Vout nominal at full load (resistive load) Doc.# 005-0005266 Rev. G 05/13/15 Page 3 Input: 36-75 V Output: 12 V Current: 33A Package: Quarter-brick Technical Specification SQ60120QPB33 Electrical Characteristics (continued) Ta = 25 °C, airflow rate = 300 LFM, Vin = 48 Vdc unless otherwise noted; full operating temperature range is -40 °C to +100 °C ambient temperature with appropriate power derating. Specifications subject to change without notice. Parameter Min. Typ. Max. Units Notes & Conditions ISOLATION CHARACTERISTICS Isolation Voltage (dielectric strength) 2250 V See Absolute Maximum Ratings Isolation Resistance 30 MΩ Isolation Capacitance (input to output) 470 pF See Note 3 TEMPERATURE LIMITS FOR POWER DERATING CURVES Semiconductor Junction Temperature 125 °C Package rated to 150 °C Board Temperature 125 °C UL rated max operating temp 130 °C Transformer Temperature 125 °C EFFICIENCY 100% Load 94.3 % 50% Load 94.8 % FEATURE CHARACTERISTICS Switching Frequency 212 250 288 kHz ON/OFF Control (Option P) Off-State Voltage -1 0.8 V On-State Voltage 2.4 18 V ON/OFF Control (Option N) Off-State Voltage 2.4 18 V On-State Voltage -1 0.8 V ON/OFF Control (Either Option) Application notes Figure B Pull-Up Voltage 5.0 V Pull-Up Resistance 124 kΩ Output Over-Voltage Protection 16 V Over full temp range; no load Over-Temperature Shutdown OTP Trip Point 140 150 °C Average PCB Temperature Over-Temperature Shutdown Restart Hysteresis 10 °C RELIABILITY CHARACTERISTICS Calculated MTBF (Telcordia) TR-NWT-000332 2.6 106 Hrs. 80% load, 200 LFM, 40 °C Ta Calculated MTBF (MIL-217) MIL-HDBK-217F 2.1 106 Hrs. 80% load, 200 LFM, 40 °C Ta Field Demonstrated MTBF TBD 106 Hrs. See our website for details Note 1: UL’s product certification tests were carried out using 15 A fast blow fuse. Fuse interruption characteristics have to be taken into account while designing input traces. User should ensure that Input trace is capable of withstanding fault currents Note 2: For applications requiring reduced output voltage ripple and noise, consult SynQor applications support (e-mail: [email protected]) Note 3: Isolation capacitance can be added external to the module. Product # SQ60120QPB33 Phone 1-888-567-9596 www.synqor.com Doc.# 005-0005266 Rev. G 05/13/15 Page 4 Input: 36-75 V Output: 12 V Current: 33A Package: Quarter-brick Technical Specification Standards Compliance & Qualification Testing Parameter Notes & Conditions STANDARDS COMPLIANCE UL 60950-1/R2011-12 Basic insulation EN60950-1/A2:2013 CAN/CSA-C22.2 No. 60950-1/A1:2011 Note: An external input fuse must always be used to meet these safety requirements. Contact SynQor for official safety certificates on new releases or download from the SynQor website. Parameter QUALIFICATION TESTING Life Test Vibration Mechanical Shock Temperature Cycling Power/Thermal Cycling Design Marginality Humidity Solderability Product # SQ60120QPB33 # Units 32 5 5 10 5 5 5 15 pins Phone 1-888-567-9596 Test Conditions 95% rated Vin and load, units at derating point, 1000 hours 10-55 Hz sweep, 0.060" total excursion, 1 min./sweep, 120 sweeps for 3 axis 100g minimum, 2 drops in x, y and z axis -40 °C to 100 °C, unit temp. ramp 15 °C/min., 500 cycles Toperating = min to max, 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 85 °C, 95% RH, 1000 hours, continuous Vin applied except 5 min/day MIL-STD-883, method 2003 www.synqor.com Doc.# 005-0005266 Rev. G 05/13/15 Page 5 Input: 36-75 V Output: 12 V Current: 33A Package: Quarter-brick Technical Specification 30 95 25 Power Dissipation (W) 100 Efficiency (%) 90 85 80 36 Vin 75 20 15 10 48 Vin 75 Vin 3 6 9 12 15 18 21 Load Current (A) 24 27 30 48 Vin 75 Vin 70 0 36 Vin 5 0 33 Figure 1: Efficiency at nominal output voltage vs. load current for minimum, nominal, and maximum input voltage at 25 °C. 0 3 6 9 12 15 18 21 Load Current (A) 24 27 30 33 Figure 2: Power dissipation at nominal output voltage vs. load current for minimum, nominal, and maximum input voltage at 25 °C. 20 96.0 19 95.5 Power Dissipation (W) 18 Efficiency (%) 95.0 94.5 94.0 25º C 40º C 55º C 93.5 93.0 100 200 Air Flow (LFM) 300 17 16 15 14 13 25º C 12 40º C 55º C 11 10 100 400 Figure 3: Efficiency at nominal output voltage and 60 % rated power vs. airflow rate for ambient air temperatures of 25, 40, and 55 °C (nominal input voltage). 200 Air Flow (LFM) 300 400 Figure 4: Power dissipation at nominal output voltage and 60 % rated power vs. airflow rate for ambient air temperatures of 25, 40, and 55 °C (nominal input voltage). 40 400 350 30 300 Pout (W) Iout (A) 250 20 200 150 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) 10 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) 100 50 0 0 25 40 50 60 70 25 85 Figure 5: Maximum output current derating curves vs. ambient air temperature for airflow rates of 100 LFM through 400 LFM with air flowing from pin 3 to pin 1 (nominal input voltage). Product # SQ60120QPB33 Phone 1-888-567-9596 40 Semiconductor junction60 temperature is 70 50 within 1°C of surface temperature 85 Ambient Air Temperature (ºC) Ambient Air Temperature (ºC) Figure 6: Maximum output power derating curves vs. ambient air temperature for airflow rates of 100 LFM through 400 LFM with air flowing from pin 3 to pin 1 (nominal input voltage). www.synqor.com Doc.# 005-0005266 Rev. G 05/13/15 Page 6 Input: 36-75 V Output: 12 V Current: 33A Package: Quarter-brick Technical Specification 40 400 350 30 300 Pout (W) Iout (A) 250 20 200 150 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) 10 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) 100 50 0 0 25 40 50 60 70 25 85 40 50 60 70 85 Ambient Air Temperature (ºC) Ambient Air Temperature (ºC) Figure 7: Maximum output current derating curves vs. ambient air temperature for airflow rates of 100 LFM through 400 LFM with air flowing from input to output (nominal input voltage). Figure 8: Maximum output power derating curves vs. ambient air temperature for airflow rates of 100 LFM through 400 LFM with air flowing from input to output (nominal input voltage). Figure 9: Turn-on transient at half load (resistive load) and 3mF output capacitance (5 ms/div). Input voltage pre-applied. Ch 1: Vout (5 V/div). Ch 2: ON/OFF input (2 V/div). Figure 10: Turn-on transient at zero load and 3 mF output capacitance (5 ms/ div). Input voltage pre-applied. Ch 1: Vout (5 V/div). Ch 2: ON/OFF input (2 V/ div). Figure 11: Output voltage response to step-change in load current (50%-75%50% of Iout(max); dI/dt = 0.1 A/µs). Load cap: 100 µF, electrolytic cap, 15 uF tantalum cap, and 1 µF ceramic cap. Ch 1: Vout (2 V/div), Ch 2: Iout (10 A/div). Product # SQ60120QPB33 Phone 1-888-567-9596 www.synqor.com Doc.# 005-0005266 Rev. G 05/13/15 Page 7 Input: 36-75 V Output: 12 V Current: 33A Package: Quarter-brick Technical Specification Input Reflected Ripple Current source impedance Input Terminal Ripple Current iS Output Voltage Ripple iC DC-DC Converter VOUT VSOURCE electrolytic capacitor ceramic electrolytic capacitor capacitor Figure 12: Test set-up diagram showing measurement points for Input Terminal Ripple Current (Figure 13), Input Reflected Ripple Current (Figure 14), and Output Voltage Ripple (Figure 15). Figure 13: Input Terminal Ripple Current, ic, at full rated output current and nominal input voltage with 10 µH source impedance and 47 µF electrolytic capacitor (500 mA/div). See Figure 12. Figure 14: Input reflected ripple current, is, through a 10 µH source inductor, using a 47 µF electrolytic input capacitor (20 mA/div). See Figure 12. Figure 15: Output voltage ripple at nominal input voltage and rated load current (100 mV/div). Load capacitance: 1 µF ceramic capacitor and 15 µF tantalum capacitor. Bandwidth: 20 MHz. See Figure 12. 14 Output Voltage (V) 12 10 8 6 4 36 Vin 48 Vin 2 75 Vin 0 0 10 20 30 40 Load Current (A) 50 60 70 Figure 16: Output voltage vs. load current showing typical current limit curves and converter shutdown points. Product # SQ60120QPB33 Phone 1-888-567-9596 Figure 17: Load current (25 A/div) as a function of time when the converter attempts to turn on into a 1 mΩ short circuit. Top trace (500 us/div) is an expansion of the on-time portion of the bottom trace www.synqor.com Doc.# 005-0005266 Rev. G 05/13/15 Page 8 Input: 36-75 V Output: 12 V Current: 33A Package: Quarter-brick Technical Specification 1 0 -5 Forward Transmission (dB) Output Impedance (ohms) -10 0.1 36 Vin 48 Vin 75 Vin -15 -20 -25 -30 -35 -40 -45 36 Vin 48 Vin 75 Vin -50 -55 0.01 -60 10 100 1,000 Hz 10,000 100,000 0 1000 -10 100 -20 -30 100 1,000 Hz 10,000 100,000 Figure 19: Magnitude of incremental forward transmission (FT = Vout/Vin) for minimum, nominal, and maximum input voltage at full rated power. Input Impedance (ohms) Reverse Transmission (dB) Figure 18: Magnitude of incremental output impedance (Zout = Vout/Iout) for minimum, nominal, and maximum input voltage at full rated power. 10 36 Vin 48 Vin 75 Vin 10 36 Vin 48 Vin 75 Vin 1 0.1 -40 10 100 1,000 10,000 100,000 10 Hz Phone 1-888-567-9596 1,000 10,000 100,000 Hz Figure 20: Magnitude of incremental reverse transmission (RT = Iin/Iout) for minimum, nominal, and maximum input voltage at full rated power. Product # SQ60120QPB33 100 Figure 21: Magnitude of incremental input impedance (Zin = Vin/Iin) for minimum, nominal, and maximum input voltage at full rated power. www.synqor.com Doc.# 005-0005266 Rev. G 05/13/15 Page 9 Technical Specification SQ60120QPB33 Application Section BASIC OPERATION AND FEATURES CONTROL FEATURES With voltages dropping and currents rising, the economics of an Intermediate Bus Architecture (IBA) are becoming more attractive, especially in systems requiring multiple low voltages. IBA systems separate the role of isolation and voltage scaling from regulation and sensing. The BusQor series bus converter provides isolation and a coarse voltage step down in one compact module, leaving regulation to simpler, less expensive non-isolated converters. REMOTE ON/OFF (Pin 2): The ON/OFF input, Pin 2, permits the user to control when the converter is on or off. This input is referenced to the return terminal of the input bus, Vin(-). There are two versions of the converter that differ by the sense of the logic used for the ON/OFF input. In Figure A below, the BusQor module provides the isolation stage of the IBA system. The isolated bus then distributes power to the non-isolated buck regulators to generate the required voltage levels at the point of load. In this case, the bucks are represented with SynQor’s NiQor series of nonisolated dc-dc converters. In many applications requiring multiple low voltage outputs, significant savings can be achieved in board space and overall system costs. In the positive logic version, the ON/OFF input is active high (meaning that a high turns the converter on). In the negative logic version, the ON/OFF signal is active low (meaning that a low turns the converter on). Figure B is a detailed look of the internal ON/OFF circuitry. When designing an IBA system with bus converters, the designer can select from a variety of bus voltages. While there is no universally ideal bus voltage, most designs employ one of the following: 12V, 9V, 7.5V, 5V, or 3.3V. Higher bus voltages can lead to lower efficiency for the buck regulators but are more efficient for the bus converter and provide lower board level distribution current. Lower bus voltages offer the opposite trade offs. SynQor’s SQ BusQor modules accept the full 48/60V telecom bus voltage and have a narrow output voltage range compatible with many non-isolated point of load converters. When used in IBA systems, the output variation of the BusQor must be in accordance with the input voltage range of the non-isolated converters being employed. 3.3V 48Vdc 36-75V 2.5V BusQor Converter 12Vdc Vin(+) 1.8V +5V 5V 124k 1.5V 0.9V Typical User Board NiQor Converters ON/OFF 49.9k TTL Loads 100k 48Vdc Front End Vin(_) Figure A: Example of Intermediate Bus Architecture using BusQor bus converter and NiQor non-isolated converters Product # SQ60120QPB33 Phone 1-888-567-9596 Figure B: Internal ON/OFF pin circuitry www.synqor.com Doc.# 005-0005266 Rev. G 05/13/15 Page 10 Technical Specification SQ60120QPB33 Application Section 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, described in more detail in the application note titled “Input System Instability” available on www.SynQor.com. 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. Also see Fig E. Output Current Limit: The output of the BusQor module is electronically protected against output overloads. When an overload current greater than the “DC Current-Limit Inception” specification is drawn from the output, the output of the BusQor will shutdown to zero volts after the 1ms have elapsed (see Fig C). The shutdown period lasts for a typical period of 200ms (Fig D) after which the BusQor tries to power up again. If the overload persists, the output voltage will go through repeated cycles of shutdown and restart with a duty cycle of 20ms (On) and 200ms (Off) respectively. The BusQor module returns (auto resetting) to normal operation once the overload is removed. The BusQor is designed to survive in this mode indefinitely without damage and without human intervention. Output Short Circuit Protection: When the output of the BusQor module is shorted, a peak current of typically 55A will flow into the short circuit for a time of about 1ms. The output of the BusQor will shutdown to zero volts after the 1ms have elapsed (Fig C & D). The shutdown period lasts for a time of 200ms, at the end of which the BusQor module tries to power up again. If the short circuit persists, the output voltage will go through repeated cycles of shutdown and restart with a duty cycle of 20ms (On) and 200ms (Off) respectively. The BusQor module returns (auto resetting) to normal operation once the short circuit is removed. The BusQor is designed to survive in this mode indefinitely without damage and without human intervention. In the Auto resetting mode, also referred to as “Hiccup” mode, the power drawn from the 48V input is about 5W, most of which is dissipated into the external fault. It is important that copper traces and pads from the output circuit be designed to withstand the short term peaks, although the average current into the fault may be as low as 50mA typical. See Fig 17 for appropriate waveform. 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. Output Current Output Current 55A 33A Output Voltage Output Voltage <12V <12V 12V 0V 0V 1ms Time Figure C: Output Overload protection diagram (not to scale) Product # SQ60120QPB33 55A Peak peak Phone 1-888-567-9596 Time Shutdown 200ms Period Duty 20ms Cycle Figure D: Output Short Circuit and Auto-Resetting protection diagram (not to scale) www.synqor.com Doc.# 005-0005266 Rev. G 05/13/15 Page 11 Technical Specification SQ60120QPB33 Application Section APPLICATION CONSIDERATIONS Startup Inhibit Period: Figure E details the Start-Up Inhibit Period for the BusQor module when Vin is applied with the On/Off pin asserted (enabled). Before time t1, when the input voltage Off pin asserted (enabled). Before time t1, when the input voltage is below the UVL threshold, the unit is disabled by the Input Under-Voltage Lockout feature. When the input voltage rises above the UVL threshold, the Input Under-Voltage Lockout is released, and a typical Startup Inhibit Period of 8ms from a Vin start-up. Once the module recognizes it should be on it waits an additional 4ms before it starts. When starting from an on/ off event the module has an inhibit time of 200ms like our standard products. The output builds up to 90% or higher of the nominal voltage and stabilizes to its nominal output voltage in a total time of 15ms typical. At time t2, when the On/Off pin is de-asserted (disabled), the BusQor module stops switching immediately. Fall time from 12V to 0V is dependent on output capacitance load current, and any parasitic trace inductance in the output load circuit. At time t3, when the On/Off pin is re-asserted (enabled), the BusQor module output begins to build up after the inhibit period of 200ms typical. Vin UVLO On/Off (N logic) OFF ON t0 t1 t2 t t3 Vout 12V 12 ms Start-up Inhibit 200 ms Fault Inhibit Start-Up Time 15 ms Figure E: Power Up/Down Diagram (not to scale) showing Start-Up Inhibit Period. Refer to the Control Features section of the data sheet for details on enabling and disabling methods for N and P logic type modules. Product # SQ60120QPB33 Phone 1-888-567-9596 www.synqor.com Doc.# 005-0005266 Rev. G 05/13/15 Page 12 Technical Specification SQ60120QPB33 Application Section Droop Current Sharing: This product has primary side regulation only. Primary side regulation results in a voltage droop as the load current increase (droop characteristic). The inherent impedance of the power stage due to its droop characteristic can be used to balance the load current between multiple modules that are placed in parallel. The graphs in this section show two units by way of example, but there is no fundamental limit to the number of units that can be placed in parallel. When multiple units having droop characteristics are placed in parallel, the current sharing accuracy is determined by the output voltage set point accuracy relative to the total output voltage droop for a given load current range. A difference in voltage between two units will cause a differential current to flow out of one unit and into the other. Figure F shows an example with two units with an output voltage mismatched by 0.5%. In this example, when Unit A is at 100% of its full rated load current, Unit B is only at 90%, effectively reducing the total available current by 5%. SynQor uses factory calibration of each unit to ensure that output voltage is well matched. Temperature Mismatch Self Balancing: the slope of the output voltage droop characteristic of semi regulated module increases with increased temperature. Therefore, if a paralleled unit were hotter than its neighbor because it is supplying more load current, then its output voltage will droop further forcing the cooler module(s) to increase its load current. The increase in effective output resistance due to an increase in temperature acts as a self correcting mechanism (Fig G) when two or more modules are connected in a parallel configuration. Droop Characteristics with Voltage Mismatch 0.0% -0.5% -0.50% Output Voltage Droop (% of Nominal) Output Voltage Droop (% of Nominal) Droop Characteristics with Temperature Mismatch (Self Balancing) 0.00% -1.0% -1.5% -2.0% -2.5% -3.0% -3.5% Unit A -1.00% -1.50% -2.00% -2.50% -3.00% -3.50% Unit A (cooler) Unit B Unit B (hotter) -4.00% -4.0% 0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 0% 100% Figure F: Example of Droop Characteristic with Output Voltage Mismatch. Product # SQ60120QPB33 Phone 1-888-567-9596 10% 20% 30% 40% 50% 60% 70% 80% 90% 100% Load Current (% of Rated Value) Load Current (% of Rated Value) Figure G: Droop Characteristic with Temperature Mismatch (self balancing) www.synqor.com Doc.# 005-0005266 Rev. G 05/13/15 Page 13 Technical Specification SQ60120QPB33 Ordering Information Part Numbering System Ordering Information The part numbering system for SynQor’s dc-dc converters follows the format shown in the example below. The tables below show the valid model numbers and ordering options for converters in this product family. When ordering SynQor converters, please ensure that you use the complete 15 character part number consisting of the 12 character base part number and the additional characters for options. Add “-G” to the model number for 6/6 RoHS compliance. SQ 6 0 1 2 0 Q P B 3 3 N R S - G 6/6 RoHS Options (see Ordering Information) Model Number SQ60120QPB33xyz-G Input Voltage 36-75 V Output Voltage 12 V Max Output Current 33 A Output Current Thermal Design The following options must be included in place of the w x y z spaces in the model numbers listed above. Performance Level Package Size Thermal Design Output Voltage Input Voltage B - Baseplated Product Family The first 12 characters comprise the base part number and the last 3 characters indicate available options. The “-G” suffix indicates 6/6 RoHS compliance. Options Description: x y z Enable Logic Pin Style N - Negative P - Positive K - 0.110" N - 0.145" R - 0.180" Y - 0.250" Feature Set S - Standard Not all combinations make valid part numbers, please contact SynQor for availability. See the Product Summary web page for more options. Application Notes A variety of application notes and technical white papers can be downloaded in pdf format from our website. RoHS Compliance: The EU led RoHS (Restriction of Hazardous Substances) Directive bans the use of Lead, Cadmium, Hexavalent Chromium, Mercury, Polybrominated Biphenyls (PBB), and Polybrominated Diphenyl Ether (PBDE) in Electrical and Electronic Equipment. This SynQor product is 6/6 RoHS compliant. For more information please refer to SynQor’s RoHS addendum available at our RoHS Compliance / Lead Free Initiative web page or e-mail us at [email protected]. PATENTS SynQor holds numerous U.S. patents, one or more of which apply to most of its power converter products. Any that apply to the product(s) listed in this document are identified by markings on the product(s) or on internal components of the product(s) in accordance with U.S. patent laws. SynQor’s patents include the following: Contact SynQor for further information: Phone: Toll Free: Fax: E-mail: Web: Address: Product # SQ60120QPB33 978-849-0600 888-567-9596 978-849-0602 [email protected] www.synqor.com 155 Swanson Road Boxborough, MA 01719 USA Phone 1-888-567-9596 5,999,417 6,222,742 6,545,890 6,594,159 6,731,520 6,894,468 6,896,526 6,927,987 7,050,309 7,072,190 7,085,146 7,119,524 7,269,034 7,272,021 7,272,023 7,558,083 7,564,702 7,765,687 7,787,261 8,023,290 8,149,597 8,493,751 8,644,027 Warranty SynQor offers a three (3) year limited warranty. Complete warranty information is listed on our website or is available upon request from SynQor. www.synqor.com Doc.# 005-0005266 Rev. G 05/13/15 Page 14