Technical Specification BQ55090QPA40 35-55 V 9.6 V 43 A 2000 V dc Quarter-brick Continuous Input Output Current Isolation DC-DC Converter The BusQor BQ55090QPA40 bus converter is a nextgeneration, board-mountable, isolated, fixed switching frequency dc/dc converter that uses synchronous rectification to achieve extremely high conversion efficiency. The power dissipated by the converter is so low that a heatsink is not required, which saves cost, weight, height, and application effort. The BusQor series provides an isolated step down voltage from 48 V to 12 or 9.6 V intermediate bus with no regulation in a standard “quarter-brick” module. BusQor converters are ideal for creating the mid-bus voltage required to drive point-of-load (non-isolated) converters in intermediate bus architectures. ® Bus Converter Operational Features • High efficiency, 96.5% at full rated load current • Delivers full power with minimal derating - no heatsink required • Operating input voltage range: 35-55 V • Fixed frequency switching provides predictable EMI • No minimum load requirement BQ55090QPA40 Module Control Features • On/Off control referenced to input side • Inherent current share (by droop method) for high current and parallel applications. Mechanical Features Protection Features • Input under-voltage lockout and over-voltage shutdown protects against abnormal input voltages • Output current limit and short circuit protection (auto recovery) • Thermal shutdown • Industry standard quarter-brick pin-out configuration • Size: 1.45” x 2.3” (36.8 x 58.4 mm) • Total height: 0.467” (11.86 mm) • Total weight: 1.5 oz (42 g) Contents Safety Features • UL 60950-1/R2011-12 • EN60950-1/A2:2013 • CAN/CSA-C22.2 No. 60950-1/A1:2011 Product # BQ55090QPA40 Phone 1-888-567-9596 Page No. Mechanical Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 BQ55090QPA40 Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . 3 Standards Compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Technical Specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Application Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Ordering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 www.synqor.com Doc.# 005-2BQ559K Rev. F 05/07/15 Page 1 Input:35-55 V Output:9.6 V Current:43 A Part No.:BQ55090QPA40 Technical Specification Mechanical Diagram NOTES 1) 2) 3) 4) 5) 6) PIN DESIGNATIONS Pins 1-3 are 0.040” (1.02 mm) diameter with 0.080” (2.03 mm) diameter standoff shoulders. Pins 4-5 are 0.062” (1.57 mm) diameter with 0.100” (2.54 mm) diameter standoff shoulders. Other pin lengths available. Recommended pin length is 0.03” (0.76 mm) greater than the PCB thickness. All Pins: Material - Copper Alloy Finish: Tin over Nickel plate Undimensioned components are shown for visual reference only. All dimensions in inches (mm) Tolerances: x.xx +/-0.02 in. (x.x +/-0.5 mm) x.xxx +/-0.010 in. (x.xx +/-0.25 mm) Pin Name Function 1 2 3 4 5 Vin(+) ON/OFF Vin(–) Vout(–) Vout(+) Positive input voltage Logic control input to turn converter on and off. Negative input Negative output Positive output 7) 8) 9) Weight: 1.5 oz (42 g) typical Workmanship: Meets or exceeds IPC-A-610C Class II UL/TUV standards require a clearance of 0.04” (1.02 mm) around primary areas of the module. 10) The flanged pins are designed to permit surface mount soldering (allowing to avoid the wave soldering process) through the use of the flanged pin-in-paste technique. Product # BQ55090QPA40 Phone 1-888-567-9596 www.synqor.com Doc.# 005-2BQ559K Rev. F 05/07/15 Page 2 Input:35-55 V Output:9.6 V Current:43 A Part No.:BQ55090QPA40 Technical Specification BQ55090QPA40 Electrical Characteristics Ta = 25 °C, airflow rate = 300 LFM, Vin = 48 V dc 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 Product # BQ55090QPA40 Min. Typ. Max. -1 35 48 60 55 N/A V V V 2000 100 125 18 V °C °C V 55 V -40 -45 -2 35 48 33.5 31.1 2.4 47 0.22\11 V V V V V V A mA mA mA mA A µF µH\µF 9.6 V 42\4.0 5.2\500 2\200 %\V %\mV %\mV V 56.2 59.2 15.0 10 140 9.5 130 30.0 20 20 6.500 11.000 50 20 0 Phone 1-888-567-9596 Units Notes & Conditions 90 43 50 5 10 3,000 www.synqor.com mV mV A A V mA µF Continuous Continuous RMS through 10 µH inductor RMS, full load Fast blow external fuse recommended Typical ESR 0.1-0.2 Ω Internal values Over sample, line, load, temperature & life 20 MHz bandwidth; see Note 2 Full load Full load Subject to thermal derating Negative current drawn from output 9.6 Vout at 20 A Resistive Load Doc.# 005-2BQ559K Rev. F 05/07/15 Page 3 Input:35-55 V Output:9.6 V Current:43 A Part No.:BQ55090QPA40 Technical Specification BQ55090QPA40 Electrical Characteristics (continued) Ta = 25 °C, airflow rate = 300 LFM, Vin = 48 V dc 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. 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 (with 3mF output capacitance) Start-Up Inhibit Time Output Voltage Overshoot ISOLATION CHARACTERISTICS Isolation Voltage (dielectric strength) Isolation Resistance Isolation Capacitance (input to output) TEMPERATURE LIMITS FOR POWER DERATING CURVES Semiconductor Junction Temperature Board Temperature Transformer Temperature Maximum Baseplate Temperature, Tb EFFICIENCY 100% Load 50% Load FEATURE CHARACTERISTICS Switching Frequency 170 ON/OFF Control (Option P) Off-State Voltage -1 On-State Voltage 2.4 ON/OFF Control (Option N) Off-State Voltage 2.4 On-State Voltage -1 ON/OFF Control (Either Option) Pull-Up Voltage Pull-Up Resistance Output Over-Voltage Protection Over-Temperature Shutdown OTP Trip Point 140 Over-Temperature Shutdown Restart Hysteresis Load Current Scale Factor RELIABILITY CHARACTERISTICS Max. 200 100 Units Notes & Conditions mV µs 50% to 75% to 50% Iout max To within 1% Vout nom ms ms % Half load resistive, Vout=90% nom. -40 °C to +125 °C; Figure E 3 mF load capacitance V MΩ pF See Absolute Maximum Ratings Package rated to 150 °C UL rated max operating temp 130 °C N/A °C °C °C °C 96.5 97 % % 8 200 0 12 2000 30 470 125 125 125 200 230 kHz 0.8 18 V V 18 0.8 V V See Note 3 Application notes Figure B 5.0 100 N/A 150 10 3333 Calculated MTBF (Telcordia) TR-NWT-000332 4.8 Calculated MTBF (MIL-217) MIL-HDBK-217F Field Demonstrated MTBF 3.3 V kΩ V °C °C Average PCB Temperature See Application Notes; Output Load Current Calc. 106 Hrs. 80% load, 200 LFM, 40 °C Ta 106 Hrs. 80% load, 200 LFM, 40 °C Ta 106 Hrs. See our website for details Note 1: UL’s product certification tests were carried out using 20 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 # BQ55090QPA40 Phone 1-888-567-9596 www.synqor.com Doc.# 005-2BQ559K Rev. F 05/07/15 Page 4 Input:35-55 V Output:9.6 V Current:43 A Part No.:BQ55090QPA40 Technical Specification Standards Compliance 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. Qualification Testing Parameter QUALIFICATION TESTING Life Test Vibration Mechanical Shock Temperature Cycling Power/Thermal Cycling Design Marginality Humidity Solderability Product # BQ55090QPA40 # 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.# 005-2BQ559K Rev. F 05/07/15 Page 5 Input:35-55 V Output:9.6 V Current:43 A Part No.:BQ55090QPA40 Technical Specification 100 20 18 16 Power Dissipation (W) Efficiency (%) 95 90 85 80 35 Vin 48 Vin 55 Vin 75 5 10 15 20 25 30 35 12 10 8 6 35 Vin 4 48 Vin 55 Vin 2 70 0 14 0 40 0 5 10 15 Load Current (A) 20 25 30 35 40 Load Current (A) Figure 1: Efficiency at nominal output voltage vs. load current for minimum, nominal, and maximum input voltage at 25 °C. Figure 2: Power dissipation at nominal output voltage vs. load current for minimum, nominal, and maximum input voltage at 25 °C. 12 98 10 Output Voltage (V) Efficiency (%) 97 96 95 25 ºC 40 ºC 55 ºC 94 100 200 300 8 6 4 35V 2 48V 55V 0 400 0 Air Flow (LFM) Figure 3: 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). 5 10 15 20 25 Load Current (A) 30 35 40 Figure 4: Output voltage regulation vs. load current for minimum, nominal, and maximum input voltage at 25 °C. 45 40 35 Iout (A) 30 25 20 15 400 300 200 100 10 5 LFM (2.0 LFM (1.5 LFM (1.0 LFM (0.5 m/s) m/s) m/s) m/s) 0 25 40 55 70 85 Semiconductor junction temperature is within 1°C of surface temperature Ambient Air Temperature (ºC) Figure 5: 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). Product # BQ55090QPA40 Phone 1-888-567-9596 Figure 6: Thermal plot of converter at 43 amp load current (400 W) with 55 °C air flowing at the rate of 200 LFM. Air is flowing across the converter from pin 3 to pin 1 (nominal input voltage). www.synqor.com Doc.# 005-2BQ559K Rev. F 05/07/15 Page 6 Input:35-55 V Output:9.6 V Current:43 A Part No.:BQ55090QPA40 Technical Specification 45 40 Semiconductor junction temperature is within 1°C of surface temperature 35 Iout (A) 30 25 20 15 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) 10 5 0 25 40 55 70 85 Ambient Air Temperature (ºC) Figure 7: Maximum output power derating curves vs. ambient air temperature for airflow rates of 100 LFM through 400 LFM with air flowing from output to input (nominal input voltage). Figure 8: Thermal plot of converter at 43 amp load current (400 W) with 55 °C air flowing at the rate of 200 LFM. Air is flowing across the converter from output to input (nominal input voltage). Figure 9: Turn-on transient at half load (resistive load) and 3 mF output capacitance (2.0 ms/div). Input voltage pre-applied. Channel 1: Vout (2 V/div). Channel 2: ON/OFF input (2 V/div). Figure 10: Turn-on transient at zero load and 3 mF output capacitance (2.0 ms/ div). Input voltage pre-applied. Channel 1: Vout (2 V/div). Channel 2: ON/OFF input (2 V/div). See Fig. 14 10 µH source impedance See Fig. 13 See Fig. 15 iS VSOURCE iC DC/DC Converter 47 µF, <1W ESR electrolytic capacitor 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: 15 µF, 100 mW ESR tantalum cap and 1 µF ceramic cap. Top trace: Vout (200 mV/div), Bottom trace: Iout (10 A/div). Product # BQ55090QPA40 Phone 1-888-567-9596 VOUT 1 µF 15 µF, ceramic 450mW ESR capacitor tantalum 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). www.synqor.com Doc.# 005-2BQ559K Rev. F 05/07/15 Page 7 Input:35-55 V Output:9.6 V Current:43 A Part No.:BQ55090QPA40 Technical Specification 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 (50 mA/div). See Figure 12. Figure 14: Input reflected ripple current, is, through a 10 µH source inductor at nominal input voltage and rated load current (5 mA/div). See Figure 12. 12 Output Voltage (V) 10 8 6 4 35 Vin 48 Vin 2 55 Vin 0 0 Figure 15: Output voltage ripple at nominal input voltage and rated load current (50 mV/div). Load capacitance: 1 µF ceramic capacitor and 15 µF tantalum capacitor. Bandwidth: 20 MHz. See Figure 12. 10 20 30 Load Current (A) 40 50 60 Figure 16: Output voltage vs. load current showing typical current limit curves and converter shutdown points. Output Impedance (ohms) 1 0.1 0.01 35 Vin 48 Vin 55 Vin 0.001 10 Figure 17: Load current (10 A/div) as a function of time when the converter attempts to turn on into a 1 mW short circuit. Top trace (5.0 ms/div) is an expansion of the on-time portion of the bottom trace. Product # BQ55090QPA40 Phone 1-888-567-9596 100 1,000 Hz 10,000 100,000 Figure 18: Magnitude of incremental output impedance (Zout = vout/iout) for minimum, nominal, and maximum input voltage at full rated power. www.synqor.com Doc.# 005-2BQ559K Rev. F 05/07/15 Page 8 Input:35-55 V Output:9.6 V Current:43 A Part No.:BQ55090QPA40 0 0 -5 -5 Reverse Transmission (dB) Forward Transmission (dB) Technical Specification -10 -15 -20 35 Vin 48 Vin 55 Vin -25 -10 -15 -20 35 Vin 48 Vin 55 Vin -25 -30 -30 10 100 1,000 Hz 10,000 100,000 10 100 1,000 10,000 100,000 Hz Figure 19: Magnitude of incremental forward transmission (FT = vout/vin) for minimum, nominal, and maximum input voltage at full rated power. Figure 20: Magnitude of incremental reverse transmission (RT = iin/iout) for minimum, nominal, and maximum input voltage at full rated power. Input Impedance (ohms) 1000 100 10 35 Vin 48 Vin 55 Vin 1 0.1 10 100 1,000 10,000 100,000 Hz Figure 21: Magnitude of incremental reverse transmission (RT = Iin/Iout) for minimum, nominal, and maximum input voltage at full rated power. Product # BQ55090QPA40 Phone 1-888-567-9596 www.synqor.com Doc.# 005-2BQ559K Rev. F 05/07/15 Page 9 Input:35-55 V Output:9.6 V Current:43 A Part No.:BQ55090QPA40 Technical Specification 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 non-isolated 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. Vin+ 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 9.6 Vout BusQor module acts as a true dc transformer. The output voltage is proportional to the input voltage, with a specified “turns ratio” or voltage ratio, plus minor drop from the internal resistive losses in the module. 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. 5k 5V 100k On/Off 49.9k TTL 100k Vin Figure B: Internal ON/OFF pin circuitry The BusQor architecture is very scalable, meaning multiple bus converters can be connected directly in parallel to allow current sharing for higher power applications. 3.3V 48Vdc 35-55V BusQor Converter 9.6Vdc 2.5V 1.8V 1.5V 48Vdc Front End 0.9V Typical User Board NiQor Converters Loads Figure A: Example of Intermediate Bus Architecture using BusQor bus converter and NiQor non-isolated converters Product # BQ55090QPA40 Phone 1-888-567-9596 www.synqor.com Doc.# 005-2BQ559K Rev. F 05/07/15 Page 10 Input:35-55 V Output:9.6 V Current:43 A Part No.:BQ55090QPA40 Technical Specification 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”. 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 Figure E. Output Short Circuit Protection: When the output of the BusQor module is shorted, a peak current of typically 72 A will flow into the short circuit for a period of about 20ms. The output of the BusQor will shutdown to zero volts for the same period (Figure D). The shutdown period lasts for a period 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 repeat ed 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. Output Current Vin 53A 43A UVLO On/Off (N logic) Output Voltage 9.6V OFF ON 0V t0 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 shuts down to zero volt in a period of 1ms typical (see Figure C). The shutdown period lasts for a typical period of 200 ms (Figure 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 Output Current Current 72A peak Output Output Voltage Voltage 9.6V 0V 0V 220ms Time 20ms Figure D: Output Short Circuit and Auto-Resetting protection diagram (not to scale) Product # BQ55090QPA40 Phone 1-888-567-9596 t1 t2 t t3 Vout 1ms Time Figure C: Output Overload protection diagram (not to scale) 12V 3ms 4ms Time 6-12ms Figure E: Power Up/Down Diagram (not to scale) showing Start-Up Inhibit Period 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 5 Watts, 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 100mA typical. See Figure 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. www.synqor.com Doc.# 005-2BQ559K Rev. F 05/07/15 Page 11 Input:35-55 V Output:9.6 V Current:43 A Part No.:BQ55090QPA40 Technical Specification APPLICATION CONSIDERATIONS Start-Up Inhibit Period: Figure E details the Start-Up Inhibit Period for the BusQor module. At time t0, when Vin is applied with On/Off pin asserted (enabled), the BusQor output begins to build up. 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 3ms is initiated. The output builds up to 90% or higher of the nominal voltage and stabilizes at the nominal value of 9.6 V in a period of 2 to 8ms typical (depending on loading). The rise time from 0V to 90% is 1.8ms typical (with 3mF external output capacitance at no load). At time t2, when the On/Off pin is de-asserted (disabled), the BusQor output instantly drops to 0V. Fall time from 9.6V to 0V is dependent on output capacitance 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 4ms typical. Refer to the Control Features section of the data sheet for details on enabling and disabling methods for N and P logic type modules. Keep Out Areas: Copper Keep Out Area: Keep out areas shown in Figure F are to be observed for Top layer copper traces and vias. Internal layers buried one or more layers may be exempt, depending on the PCB material grade and thickness. Users are advised to consult UL standards for details. All layers including top and bottom, are subject to the keep out areas shown around Primary pins of BusQor module. Actual keep outs along the surface (Creepage) may vary depending on the PCB material CTI. Users are advised to consult UL standards for details. Bridging Components: Bridging components like EMI filter capacitors required to be placed as close as possible to the BusQor module for optimum performance must observe the clearance/creepage requirements of 0.04”(40 mils) between pads to maintain compliance to UL standards for the overall power system. Note: Referenced keep out widths are adequate to withstand ULs Basic Insulation Dielectric strength tests for approved PCB materials. Applications requiring Double or Reinforced insulation must double the keep out widths shown in Figure F. Keep out areas shown have standard margins above ULs minimum requirements. Component Keep Out Area: Keep out areas for components not referenced to the Primary circuit are shown in shaded areas in Figure F. The keep out areas shown are consistent with UL’s requirements for Basic Insulation of 0.04” (40 mils) for Pollution degree 2. User should consult UL standards for other insulation classes and operating environments. Output Load Current Calculation: The BusQor series allows the converter output load to be measured without adding a current loop or external shunt resistor to the designer’s PCB board under test. On the top side of the BusQor converter is a current sense resistor as shown in Figure G. The output load current is proportional to the voltage drop across this sense resistor. This calculation is detailed below. For applications that require mounting parts BELOW the BusQor module, one should be aware of potential high levels of electromagnetic interference, in addition to safety keep out. Users are advised to consult SynQor Applications engineering in such applications. A current sense resistor referenced to the primary input is used in the equation below to calculate the output load current. 0.01” Iload = (VRsense(load) - VRsense(no load) ) x 3333 where: Iload = output load current VRsense(load) = voltage across the sense resistor with converter under load VRsense(no load) = voltage across the sense resistor with converter at zero load 0.023” Bridging Capacitor 0.01” 1.50” Primary Secondary Figure F: Keep Out Areas for BusQor module Product # BQ55090QPA40 Phone 1-888-567-9596 Figure G: Location of Sense Resistor www.synqor.com Doc.# 005-2BQ559K Rev. F 05/07/15 Page 12 Input:35-55 V Output:9.6 V Current:43 A Part No.:BQ55090QPA40 Technical Specification 5.0% 4.0% Deviation from 50/50 Sharing (%) The number 3333 is a “Load Current Scale Factor” for this product, valid only for Vin = 48V. Hence, measurement should be made at this input voltage. The voltage drop across the sense resistor is about 13mV at full load of 43A. Therefore, proper measuring techniques must be used to ensure accuracy. A calibrated DMM set to 300mV is acceptable. Since this measurement is done on the Primary area of the converter, a slight non-linearity may be observed over the load current range. Using the Scale Factor referenced above, the error may be on the order of 4%. For more detailed information consult the application note on SynQor’s web site titled “Output Load Current Calculations”. 3.0% 2.0% 1.0% 0.0% -1.0% -2.0% -3.0% Module 1 -4.0% -5.0% Module 2 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 Total Load Current (A) Figure I: Current share performance of 2 paralleled modules 5 BusQor module (N logic option) 2 4 3 1 Vin 1 9.6Vout 86A The current share performance of two paralleled modules is illustrated in the graph in Figure I. In this graph the percent deviation from ideal sharing (50%) is plotted for each module versus the total output load current at 48Vin. 5 BusQor module (N logic 2 option) 4 3 48Vin BusQor module CM EMI filter Figure H: BusQor Output Paralleling for increased current output. Bulk Cap Current Sharing: BusQor modules are designed to operate in parallel without the use of any external current share circuitry. A typical circuit for paralleling two BusQor modules is shown in Figure H. An output capacitor is recommended across each module and located close to the converter for optimum filtering and noise control performance. Dedicated input inductors are recommended but are considered optional. Input capacitors must be located close to the converter module. PCB layout in the input circuit should be such that high frequency ripple currents of each module is restricted to a loop formed by the input capacitors and the input terminals of the BusQor module. See Figure J for details on PCB layout. Contact SynQor application engineering for further assistance on PCB trace design. Product # BQ55090QPA40 Phone 1-888-567-9596 BusQor module (Not shown in Figure H) Input LC filters Figure J: Recommended PCB layout for input circuit www.synqor.com Doc.# 005-2BQ559K Rev. F 05/07/15 Page 13 Input:35-55 V Output:9.6 V Current:43 A Part No.:BQ55090QPA40 Technical Specification PART NUMBERING SYSTEM ORDERING INFORMATION The part numbering system for SynQor’s BusQor DC bus 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 3 characters for options. A “-G” suffix indicates the product is 6/6 RoHS compliant. BQ 5 5 0 9 0 Q P A 4 0 N N S - G 6/6 RoHS Options (see Ordering Information) Output Current Model Number Input Voltage Output Voltage Max Output Current BQ55090QPA40xyz 35-55 V 9.6 V 43 A Thermal Design Performance Level Package Size Output Voltage The following option choices must be included in place of the x y z spaces in the model numbers listed above. Input Voltage Product Family Options Description: x y z The first 12 characters comprise the base part number and the last 3 characters indicate available options. Although there are no default values for enable logic and pin length, the most common options are negative logic and 0.145” pins. These part numbers are more likely to be readily available in stock for evaluation and prototype quantities. A “-G” suffix indicates the product is 6/6 RoHS compliant. Enable Logic Pin Style Feature Set *P - Positive N - Negative K - 0.110" N - 0.145" R - 0.180" Y - 0.250" S - Standard * Consult the factory before ordering the P logic option. Application Notes A variety of application notes and technical white papers can be downloaded in pdf format from our website. 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: 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 Contact SynQor for further information: Phone: Toll Free: Fax: E-mail: Web: Address: Product # BQ55090QPA40 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 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.# 005-2BQ559K Rev. F 05/07/15 Page 14