PQ60018QPA60NKS

Technical Specification PQ60018QPA60 48 V Input 1.8 V Output 60 A Current 2000 Vdc Isolation Quarter-brick DC/DC Converter The PQ60018QPA60 PowerQor™ Peta Quarter-brick converter is a next-generation, 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. All of the power and control components are mounted to the multi-layer PCB substrate with high-yield surface mount technology. Since the PowerQor converter has no explicit thermal interfaces, it is extremely reliable. The Peta series offers industry leading output currents for any standard quarter-brick module. RoHS Compliant see last page. Operational Features • Ultra-high efficiency, 90% half load, 87% full load • Delivers up to 60 A of output current with minimal derating - no heatsink required • Wide input voltage range: 35 - 75 V, with 100V 100ms input voltage transient capability • Fixed frequency switching provides predictable EMI performance • No minimum load requirement means no preload resistors required PQ60018QPA60 Module Protection Features • Input under-voltage lockout disables converter at low input voltage conditions • Output current limit and short circuit protection protects converter and load from damage and consequent hazardous conditions • Active back bias limit prevents damage to converter from external load induced pre-bias • Output over-voltage protection protects load from damaging voltages • Thermal shutdown protects converter from abnormal environmental conditions Mechanical Features • Industry standard quarter-brick pin-out configuration • Industry standard size: 1.45" x 2.3" (36.8x58.4mm) • Total height less than 0.45" (11.4mm), permits better airflow and smaller card pitch • Total weight: 1.5 oz (42 g) • Flanged pins designed to permit surface mount soldering (avoid wave solder) using FPiP technique Safety Features • 2000V, 30 MW input-to-output isolation provides input/output ground separation • UL/cUL 60950 recognized (US & Canada), basic insulation rating • TUV certified to EN60950 • Meets 72/23/EEC and 93/68/EEC directives which facilitates CE Marking in user’s end product • Board and plastic components meet UL94V-0 flammability requirements Control Features • On/Off control referenced to input side (positive and negative logic options are available) • Remote sense for the output voltage compensates for output distribution drops • Output voltage trim permits custom voltages and voltage margining Product # PQ60018QPA60 Phone 1-888-567-9596 www.synqor.com Doc.# 005-2QP618F Rev. B 09/24/08 Page 1 Technical Specification MECHANICAL DIAGRAM 0.14 (3.6) Input: Output: Current: Package: 35 - 75 V 1.8 V 60 A Quarter-brick 2.30 (58.4) 0.450 (11.43) 2.00 (50.8) 0.300 (7.62) 0.150 (3.81) 0.43 (10.9) 0.300 1.45 (36.8) 0.600 (15.24) 0.600 (15.24) (7.62) Top View 0.750 (19.05) 0.900 (22.86) Bottom side Clearance See Note 9 0.45 (11.4) Side View 0.056 +.032 (1.42 +.81) Lowest Component Load Board Flanged Pin See Note 10 0.145 (3.68) See Note 3 NOTES 1) Pins 1-3, 6-8 are 0.040” (1.02mm) diameter with 0.080” (2.03 mm) diameter standoff shoulders. 2) Pins 4-5, 9-10 are 0.062” (1.57 mm) diameter with 0.100” (2.54 mm) diameter standoff shoulders. 3) Other pin extension lengths available. Recommended pin length is 0.03” (0.76mm) greater than the PCB thickness. 4) All Pins: Material - Copper Alloy Finish - Tin/Lead over Nickel plate 5) Undimensioned components are shown for visual reference only. 6) All dimensions in inches (mm) Tolerances: x.xx +/-0.02 in. (x.x +/-0.5mm) x.xxx +/-0.010 in. (x.xx +/-0.25mm) 7) Weight: 1.5 oz. (42 g) typical 8) Workmanship: Meets or exceeds IPC-A-610C Class II 9) UL/TUV standards require a clearance greater than 0.04” PIN DESIGNATIONS Pin No. Name 1 2 3 4 5 6 7 8 9 10 Vin(+) ON/OFF Vin(-) Vout(+) Vout(-) SENSE(-) TRIM SENSE(+) Vout(+) Vout(-) Function Positive input voltage TTL input to turn converter on and off, referenced to Vin(-), with internal pull up. Negative input voltage Positive output voltage Negative output voltage Negative remote sense1 Output voltage trim2 Positive remote sense3 Positive output voltage Negative output voltage (1.02mm) between input and output for Basic insulation. This issue should be considered if any copper traces are on the top side of the user’s board. Note that the ferrite cores are considered part of the input/primary circuit. Pins in Italics Shaded text are Optional Notes: 1. SENSE(-) may be connected to Vout(-) or left open. 2. Leave TRIM pin open for nominal output voltage. 3. SENSE(+) may be connected to Vout(+) or left open. Doc.# 005-2QP618F Rev. B 09/24/08 Page 2 10) The flanged pins are designed to permit surface mount soldering (avoiding the wave soldering process) through the use of the flanged pin-in-paste technique. Product # PQ60018QPA60 Phone 1-888-567-9596 www.synqor.com Technical Specification PQ60018QPA60 ELECTRICAL CHARACTERISTICS Parameter ABSOLUTE MAXIMUM RATINGS Input: Output: Current: Package: 35 - 75 V 1.8 V 60 A Quarter-brick TA=25°C, airflow rate=300 LFM, Vin=48Vdc 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. Min. -40 -55 -2 35 32 28.5 2.5 1.782 1.745 0 66 1.0 0 4 180 Typ. 48 33 29.5 3.5 45 1.6 150 19 165 2.0\6.6 47 1.800 +0.1 \ 2 +0.1 \ 2 +9 50 10 69 0.9 1.1 10 82 80 190 400 6 200 0 87 90 2000 30 470 Max. 100 80 100 2000 100 125 18 75 34 30.5 4.5 3.6 70 3 0.01 20 1.818 +0.3 \ 5 +0.3 \ 5 +27 1.855 100 30 60 72 3.0 50 30,000 8 240 125 125 125 Units V V V V °C °C V V V V V A mA mA A 2s mV mA mA A µH\µF µF V %\mV %\mV mV V mV mV A A V A mA µF dB mV mV µs ms ms % % % °C °C °C V MW pF Notes & Conditions Continuous Continuous 100ms transient, square wave Basic insulation, Pollution Degree 2 INPUT CHARACTERISTICS Input Voltage Non-Operating Operating Operating Transient Protection Isolation Voltage (input to output) Operating Temperature Storage Temperature Voltage at ON/OFF input pin Operating Input Voltage Range Input Under-Voltage Lockout Turn-On Voltage Threshold Turn-Off Voltage Threshold Lockout Voltage Hysteresis Maximum Input Current No-Load Input Current Disabled Input Current Inrush Current Transient Rating Response to Input Transient Input Reflected Ripple Current Input Terminal Ripple Current Recommended Input Fuse Input Filter Component Values (L\C) Recommended External Input Capacitance 100% Load, 35 Vin OUTPUT CHARACTERISTICS Internal values, see Figure E Typical ESR 0.1-0.2W, see Figure 17 1000V/ms input transient P-P thru 10µH inductor; Figures 17 & 19 RMS; Figures 17 & 18 Fast blow external fuse recommended DYNAMIC CHARACTERISTICS Output Voltage Set Point Output Voltage Regulation Over Line Over Load Over Temperature Total Output Voltage Range Output Voltage Ripple and Noise1 Peak-to-Peak RMS Operating Output Current Range Output DC Current-Limit Inception Output DC Current-Limit Shutdown Voltage Back-Drive Current Limit while Enabled Back-Drive Current Limit while Disabled Maximum Output Capacitance Over sample, line, load, temperature & life 500MHz bandwidth; Figures 17 & 20 Full Load, see Figures 17 & 20 Full Load, see Figures 17 & 20 Subject to thermal derating; Figures 5-12 Output Voltage 10% Low Negative current drawn from output Negative current drawn from output 1.8Vout at 60A Resistive Load 120 Hz; Fig. 26 50% to 75% to 50% Iout max; Figure 15 50% to 75% to 50% Iout max; Figure 16 To within 1% Vout nom Full load, Vout=90% nom.; Figures 13 & 14 -40°C to +125°C; Figure F 30,000 µF load capacitance, Iout = 0A Figures 1 - 4 Figures 1 - 4 Package rated to 150°C UL rated max operating temp 130°C See Figures 5 - 12 for derating curves EFFICIENCY Input Voltage Ripple Rejection Output Voltage during Load Current Transient For a Step Change in Output Current (0.1A/µs) For a Step Change in Output Current (1A/µs) Settling Time Turn-On Transient Turn-On Time Start-Up Inhibit Time Output Voltage Overshoot 100% Load 50% Load TEMPERATURE LIMITS FOR POWER DERATING CURVES ISOLATION CHARACTERISTICS Semiconductor Junction Temperature Board Temperature Transformer Temperature Isolation Voltage (dielectric strength) Isolation Resistance Isolation Capacitance2 Note 1: For applications requiring reduced output voltage ripple and noise, consult SynQor applications support (e-mail: support@synqor.com) Note 2: Higher values of isolation capacitance can be added external to the module. Product # PQ60018QPA60 Phone 1-888-567-9596 www.synqor.com Doc.# 005-2QP618F Rev. B 09/24/08 Page 3 Technical Specification ELECTRICAL CHARACTERISTICS (Continued) Parameter P FEATURE CHARACTERISTICS Input: Output: Current: Package: 35 - 75 V 1.8 V 60 A Quarter-brick Min. 180 -2 2.4 2.4 -2 -20 122 Typ. 200 Vin/6.5 40 123 125 10 1600 2.37 1.75 Max. 220 0.8 18 18 0.8 9.2 +10 +10 125 Units kHz V V V V V kW % % % °C °C 6 Notes & Conditions Regulation stage and Isolation stage RELIABILITY CHARACTERISTICS Switching Frequency ON/OFF Control (Option P) Off-State Voltage On-State Voltage ON/OFF Control (Option N) Off-State Voltage On-State Voltage ON/OFF Control (Either Option) Pull-Up Voltage Pull-Up Resistance Output Voltage Trim Range Output Voltage Remote Sense Range Output Over-Voltage Protection Over-Temperature Shutdown Over-Temperature Shutdown Restart Hysteresis Load Current Scale Factor Calculated MTBF (Telcordia) Calculated MTBF (MIL-217) Field Demonstrated MTBF Figures A, B Measured across Pins 9 & 5; Figure C Measured across Pins 9 & 5 Over full temp range; % of nominal Vout Average PCB Temperature See App Note: Output Load Current Calc. 10 Hrs. TR-NWT-000332; 80% load, 200LFM, 40oC Ta 106 Hrs. MIL-HDBK-217F; 80% load, 200LFM, 40oC Ta 106 Hrs. See website for latest values STANDARDS COMPLIANCE Parameter P Notes File # E194341, Basic insulation & pollution degree 2 Certified by TUV Test on entire assembly; board & plastic components UL94V-0 compliant ESD test, 8kV - NP, 15kV air - NP (Normal Performance) Section 7 - electrical safety, Section 9 - bonding/grounding STANDARDS COMPLIANCE UL/cUL 60950 EN60950 72/23/EEC 93/68/EEC Needle Flame Test (IEC 695-2-2) IEC 61000-4-2 GR-1089-CORE Telcordia (Bellcore) GR-513 • 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 P # Units 32 5 5 10 5 5 5 15 pins Test Conditions 10-55Hz sweep, 0.060” total excursion,1 min./sweep, 120 sweeps for 3 axis QUALIFICATION TESTING Life Test Vibration Mechanical Shock Temperature Cycling Power/Thermal Cycling Design Marginality Humidity Solderability 95% rated Vin and load, units at derating point, 1000 hours 100g minimum, 2 drops in x and y axis, 1 drop in 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, 85% RH, 1000 hours, 2 minutes on and 6 hours off MIL-STD-883, method 2003 • Extensive characterization testing of all SynQor products and manufacturing processes is performed to ensure that we supply robust, reliable product. Contact factory for official product family qualification document. Product # PQ60018QPA60 Phone 1-888-567-9596 www.synqor.com Doc.# 005-2QP618F Rev. B 09/24/08 Page 4 Technical Specification 95 92 91 Input: Output: Current: Package: 35 - 75 V 1.8 V 60 A Quarter-brick 90 90 Efficiency (%) Efficiency (%) 85 89 88 87 86 85 84 80 75 35 Vin 48 Vin 75 Vin 25 C 40 C 55 C 70 65 0 5 10 15 20 25 30 35 40 45 50 55 60 0 100 200 300 400 500 Load Current (A) 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). 9 18 16 Power Dissipation (W) 14 12 10 8 6 35 Vin 4 2 0 0 5 10 15 20 25 30 35 40 45 50 55 60 48 Vin 75 Vin Power Dissipation (W) 8 7 6 5 25 C 40 C 55 C 4 0 100 200 300 400 500 Load Current (A) Air Flow (LFM) 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). 60 55 50 45 40 Iout (A) 35 30 25 20 15 10 5 0 0 25 40 55 70 85 Ambient Air Temperature (C) 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) 50 LFM (0.25 m/s) Figure 5: Maximum output power derating curves vs. ambient air temperature for airflow rates of 50 LFM through 400 LFM with air flowing from output to input (nominal input voltage and 2 output pins). Product # PQ60018QPA60 Phone 1-888-567-9596 Figure 6: Thermal plot of converter at 56 amp load with 55°C air flowing from output to input at the rate of 200 LFM with nominal Vin and 2 output pins. Test board is 4oz., 6 layer. Converter PCB is 6oz., 12 layer. Doc.# 005-2QP618F Rev. B 09/24/08 Page 5 www.synqor.com Technical Specification 60 55 50 45 40 Iout (A) 35 30 25 20 15 10 5 0 0 25 40 55 70 85 Ambient Air Temperature (C) Input: Output: Current: Package: 35 - 75 V 1.8 V 60 A Quarter-brick 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) 50 LFM (0.25 m/s) Figure 7: Maximum output power derating curves vs. ambient air temperature for airflow rates of 50 LFM through 400 LFM with air flowing from pin 3 to pin 1 (nominal input voltage and 2 output pins). 60 55 50 45 40 Iout (A) 35 30 25 20 15 10 5 0 0 25 40 55 Ambient Air Temperature (C) 70 85 Figure 8: Thermal plot of converter at 55 amp load with 55°C air flowing from pin 3 to pin 1 at the rate of 200 LFM with nominal Vin and 2 output pins. Test board is 4oz., 6 layer. Converter PCB is 6oz., 12 layer. 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) 50 LFM (0.25 m/s) Figure 9: Maximum output power derating curves vs. ambient air temperature for airflow rates of 50 LFM through 400 LFM with air flowing from output to input (nominal input voltage and 4 output pins). 60 55 50 45 40 Iout (A) 35 30 25 20 15 10 5 0 0 25 40 55 70 85 Ambient Air Temperature (C) Figure 10: Thermal plot of converter at 60 amp load with 55°C air flowing from output to input at the rate of 200 LFM with nominal Vin and 4 output pins. Test board is 4oz., 6 layer. Converter PCB is 6oz., 12 layer. 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) 50 LFM (0.25 m/s) Figure 11: Maximum output power derating curves vs. ambient air temperature for airflow rates of 50 LFM through 400 LFM with air flowing from pin 3 to pin 1 (nominal input voltage and 4 output pins). Product # PQ60018QPA60 Phone 1-888-567-9596 Figure 12: Thermal plot of converter at 60 amp load with 55°C air flowing from pin 3 to pin 1 at the rate of 200 LFM with nominal Vin and 4 output pins. Test board is 4oz., 6 layer. Converter PCB is 6oz., 12 layer. Doc.# 005-2QP618F Rev. B 09/24/08 Page 6 www.synqor.com Technical Specification Input: Output: Current: Package: 35 - 75 V 1.8 V 60 A Quarter-brick Figure 13: Turn-on transient at full rated load (resistive load) (2 ms/ div) Input voltage pre-applied. Ch 1: Vout (1V/div). Ch 2: ON/OFF input (5V/div) Figure 14: Turn-on transient at zero load current (2 ms/div). Ch 1: Vout (1V/div) Ch 2: ON/OFF input (5V/div) 75%-50% of Iout(max); dI/dt = 0.1A/µs). Load cap: 10µF, 100 mW ESR tantalum cap and 1µF ceramic cap. Ch 1: Vout (100mV/div), Ch 2: Iout (20A/div). Figure 15: Output voltage response to step-change in load current (50%- 75%-50% of Iout(max): dI/dt = 1A/µs). Load cap: 470µF, 30 mW ESR tantalum cap and 1µF ceramic cap. Ch 1: Vout (500mV/div), Ch 2: Iout (20A/div). Figure 16: Output voltage response to step-change in load current (50%- See Fig. 15 source impedance 10 µH See Fig. 14 See Fig. 16 iS VSOURCE iC DC/DC Converter 1 µF VOUT 10 µF, electrolytic capacitor 47 µF, @1W ESR ceramic 100mW ESR capacitor tantalum capacitor Figure 17: Test set-up diagram showing measurement points for Input Terminal Ripple Current (Figure 18), Input Reflected Ripple Current (Figure 19) and Output Voltage Ripple (Figure 20). Product # PQ60018QPA60 Phone 1-888-567-9596 Figure 18: Input Terminal Ripple Current, ic, at full rated output current and nominal input voltage with 10µH source impedance and 47µF electrolytic capacitor (200 mA/div). See Figure 17. Doc.# 005-2QP618F Rev. B 09/24/08 Page 7 www.synqor.com Technical Specification Input: Output: Current: Package: 35 - 75 V 1.8 V 60 A Quarter-brick Figure 19: Input reflected ripple current, is, through a 10 µH source inductor at nominal input voltage and rated load current (10 mA/div). See Figure 17. Figure 20: Output voltage ripple at nominal input voltage and rated load current (50 mV/div). Load capacitance: 1µF ceramic capacitor and 15µF tantalum capacitor. Bandwidth: 500 MHz. See Figure 17. Figure 21: Output voltage response to step-change in input voltage (50V to 100V in 40µs). Load cap: 10µF, 100 mW ESR tantalum capacitor and 1µF ceramic cap. Ch 1: Vout (200mV/div), Ch 2: Vin (20V/div). 2.0 Figure 22: Load current (20A/div) as a function of time when the converter attempts to turn on into a 1 mW short circuit. Bottom trace (5ms/ div) is an expansion of the on-time portion of the top trace. 10 9 1.5 Output Voltage (V) Vout Trim-up (%) 8 7 6 5 4 3 1.0 35 V 0.5 48 V 75 V 0.0 0 10 20 30 40 50 Load Current (A) 60 70 80 100% Load 2 1 0 40.0 39.5 39.0 38.5 38.0 37.5 37.0 36.5 36.0 35.5 35.0 Input Voltage (V) 50% Load 0% Load Figure 23: Output voltage vs. load current showing typical current limit curves and converter shutdown points. Figure 24: Achievable trim-up percentage vs. input voltage at output loads of 0%, 50% and full load. Product # PQ60018QPA60 Phone 1-888-567-9596 www.synqor.com Doc.# 005-2QP618F Rev. B 09/24/08 Page 8 Technical Specification 0.01 -20 Input: Output: Current: Package: 35 - 75 V 1.8 V 60 A Quarter-brick Forward Transmission (dB) 35 Vin 48 Vin 75 Vin Output Impedance (W) -30 -40 -50 -60 -70 -80 -90 35 Vin 48 Vin 75 Vin 0.001 10 100 1,000 Hz 10,000 100,000 -100 10 100 1,000 Hz 10,000 100,000 Figure 25: Magnitude of incremental output impedance (Zout = vout/ iout) for minimum, nominal, and maximum input voltage at full rated power. 0 -5 -10 Reverse Transmission (dB) -15 -20 -25 -30 -35 -40 -45 -50 10 100 1,000 Hz 10,000 100,000 Figure 26: Magnitude of incremental forward transmission (FT = vout/ vin) for minimum, nominal, and maximum input voltage at full rated power. 100 35 Vin 48 Vin Input Impedance (W) 75 Vin 35 Vin 48 Vin 75 Vin 10 1 0.1 10 100 1,000 Hz 10,000 100,000 Figure 27: Magnitude of incremental reverse transmission (RT = iin/ iout) for minimum, nominal, and maximum input voltage at full rated power. Figure 28: Magnitude of incremental input impedance (Zin = vin/iin) for minimum, nominal, and maximum input voltage at full rated power. Product # PQ60018QPA60 Phone 1-888-567-9596 www.synqor.com Doc.# 005-2QP618F Rev. B 09/24/08 Page 9 Technical Specification BASIC OPERATION AND FEATURES The PowerQor series converter uses a two-stage power conversion topology. The first stage is a buck-converter that keeps the output voltage constant over variations in line, load, and temperature. The second stage uses a transformer to provide the functions of input/output isolation and voltage step-down to achieve the low output voltage required. Both the first stage and the second stage switch at a fixed frequency for predictable EMI performance. Rectification of the transformer’s output is accomplished with synchronous rectifiers. These devices, which are MOSFETs with a very low on-state resistance, dissipate far less energy than Schottky diodes. This is the primary reason that the PowerQor converter has such high efficiency, even at very low output voltages and very high output currents. Dissipation throughout the converter is so low that it does not require a heatsink for operation. Since a heatsink is not required, the PowerQor converter does not need a metal baseplate or potting material to help conduct the dissipated energy to the heatsink. The PowerQor converter can thus be built more simply and reliably using high yield surface mount techniques on a PCB substrate. The PowerQor series of half-brick, quarter-brick and eighthbrick converters uses the industry standard footprint and pin-out configuration. Input: Output: Current: Package: CONTROL FEATURES 35 - 75 V 1.8 V 60 A Quarter-brick 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 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 A details five possible circuits for driving the ON/OFF pin. Figure B is a detailed look of the internal ON/OFF circuitry. REMOTE SENSE(+) (Pins 8 and 6): The SENSE(+) inputs correct for voltage drops along the conductors that connect the converter’s output pins to the load. Pin 8 should be connected to Vout(+) and Pin 6 should be connected to Vout(-) at the point on the board where regulation is desired. A remote connection at the load can adjust for a voltage drop only as large as that specified in this datasheet, that is [Vout(+) - Vout(-)] – [Vsense(+) - Vsense(-)] < Sense Range % x Vout Pins 8 and 6 must be connected for proper regulation of the output voltage. If these connections are not made, the converter will deliver an output voltage that is slightly lower than its specified value. Note: the output over-voltage protection circuit senses the voltage across the output (pins 9 and 5) to determine when it should trigger, not the voltage across the converter’s sense leads (pins 8 and 6). Therefore, the resistive drop on the board should be small enough so that output OVP does not trigger, even during load transients. ON/OFF ON/OFF ON/OFF Vin(_) Remote Enable Circuit Vin(_) Negative Logic (Permanently Enabled) ON/OFF TTL/ CMOS Vin(_) Positive Logic (Permanently Enabled) Vin(+) 274k ON/OFF 50k 5V 5V ON/OFF TTL 100pF 50k Vin(_) Open Collector Enable Circuit Vin(_) Direct Logic Drive Vin(_) Figure A: Various circuits for driving the ON/OFF pin. Product # PQ60018QPA60 Phone 1-888-567-9596 www.synqor.com Figure B: Internal ON/OFF pin circuitry Doc.# 005-2QP618F Rev. B 09/24/08 Page 10 Technical Specification OUTPUT VOLTAGE TRIM (Pin 7): The TRIM input permits the user to adjust the output voltage across the sense leads up or down according to the trim range specifications. To decrease the output voltage, the user should connect a resistor between Pin 7 and Pin 6 (SENSE(-) input). For a desired decrease of the nominal output voltage, the value of the resistor should be Input: Output: Current: Package: 35 - 75 V 1.8 V 60 A Quarter-brick It is not necessary for the user to add capacitance at the Trim pin. The node is internally bypassed to eliminate noise. Total DC Variation of Vout: For the converter to meet its full specifications, the maximum variation of the DC value of Vout, due to both trimming and remote load voltage drops, should not be greater than that specified for the output voltage trim range. Rtrim-down = where 511 - 10.22 (kW) D% () 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 TurnOff 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 turns off. The converter then enters a “hiccup mode” where it repeatedly turns on and off at a 5 Hz (nominal) frequency with a 5% duty cycle until the short circuit condition is removed. This prevents excessive heating of the converter or the load board. Output Over-Voltage Limit: If the voltage across the output pins exceeds the Output Over-Voltage Protection threshold, the converter will immediately stop switching. This prevents damage to the load circuit due to 1) excessive series resistance in output current path from converter output pins to sense point, 2) a release of a short-circuit condition, or 3) a release of a current limit condition. Load capacitance determines exactly how high the output voltage will rise in response to these conditions. After 200 ms the converter will automatically restart. 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. D% = Vnominal – Vdesired x 100% Vnominal To increase the output voltage, the user should connect a resistor between Pin 7 and Pin 8 (SENSE(+) input). For a desired increase of the nominal output voltage, the value of the resistor should be Rtrim-up = where ( 5.11VOUT(100+D%) _ 511 _ 1.225D% D% 10.22 ) (kW) VOUT = Nominal Output Voltage Figure C graphs the relationship between the trim resistor value and Rtrim-up and Rtrim-down, showing the total range the output voltage can be trimmed up or down. 10,000 Trim Resistance (kOhms) 1,000 100 10 0 2 4 6 8 10 12 14 16 18 20 % increase Vout % decrease Vout Figure C: Trim Graph for 1.8Vout module Note: the TRIM feature does not affect the voltage at which the output over-voltage protection circuit is triggered. Trimming the output voltage too high may cause the over-voltage protection circuit to engage, particularly during transients. Product # PQ60018QPA60 Phone 1-888-567-9596 www.synqor.com Doc.# 005-2QP618F Rev. B 09/24/08 Page 11 Technical Specification APPLICATION CONSIDERATIONS Input System Instability: This condition can occur because any DC/DC converter appears incrementally as a negative resistance load. A detailed application note titled “Input System Instability” is available on the SynQor web site (www.synqor. com) which provides an understanding of why this instability arises, and shows the preferred solution for correcting it. Application Circuits: Figure D below provides a typical circuit diagram which details the input filtering and voltage trimming. Input Filtering and External Capacitance: Figure E below provides a diagram showing the internal input filter components. This filter dramatically reduces input terminal ripple current, which otherwise could exceed the rating of an external input electrolytic capacitor. The recommended external input capacitance is specified in the “Input Characteristics” section. More detailed information is available in the application note titled “EMI Input: Output: Current: Package: Characteristics” on the SynQor website. 35 - 75 V 1.8 V 60 A Quarter-brick Startup Inhibit Period: The Startup Inhibit Period ensures that the converter will remain off for approximately 200ms when it is shut down for any reason. When an output short is present, this generates a 5Hz “hiccup mode,” which prevents the converter from overheating. In all, there are seven ways that the converter can be shut down, initiating a Startup Inhibit Period: • Input Under-Voltage Lockout • Input Over-Voltage Shutdown (not present in Quarter-brick) • Output Over-Voltage Protection • Over Temperature Shutdown • Current Limit • Short Circuit Protection • Turned off by the ON/OFF input Vin(+) External Input Filter Electrolytic Capacitor Vout(+) Vsense(+) Rtrim-up or Vin 47µF ON/OFF Trim Vsense(_) Vin(_) Vout(_) Rtrim-down Cload Iload Figure D: Typical application circuit (negative logic unit, permanently enabled). L Vin(+) C Vin(_) Figure E: Internal Input Filter Diagram (component values listed on page 3). Product # PQ60018QPA60 Phone 1-888-567-9596 www.synqor.com Doc.# 005-2QP618F Rev. B 09/24/08 Page 12 Technical Specification Figure F shows three turn-on scenarios, where a Startup Inhibit Period is initiated at t0, t1, and t2: Before time t0, 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 Startup Inhibit Period is initiated. At the end of this delay, the ON/OFF pin is evaluated, and since it is active, the unit turns on. Input: Output: Current: Package: 35 - 75 V 1.8 V 60 A Quarter-brick At time t1, the unit is disabled by the ON/OFF pin, and it cannot be enabled again until the Startup Inhibit Period has elapsed. When the ON/OFF pin goes high after t2, the Startup Inhibit Period has elapsed, and the output turns on within the typical Turn-On Time. Vin Under-Voltage Lockout Turn-On Threshold ON/OFF (pos logic) ON OFF ON OFF ON 4ms (typical turn on time) Vout (typical start-up inhibit period) 200ms 200ms 200ms t0 t1 t2 t Figure F: Startup Inhibit Period (turn-on time not to scale) Product # PQ60018QPA60 Phone 1-888-567-9596 www.synqor.com Doc.# 005-2QP618F Rev. B 09/24/08 Page 13 Technical Specification PART NUMBERING SYSTEM The part numbering system for SynQor’s dc-dc converters follows the format shown in the example below. PQ 60 0 18 Q P A 6 0 NKS 6/6 RoHS Options (see Ordering Information) Output Current Thermal Design Performance Level Package Size Output Voltage Input Voltage Product Family Input: Output: Current: Package: ORDERING INFORMATION 35 - 75 V 1.8 V 60 A Quarter-brick 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. Model Number PQ60010QPA60xyz PQ60010QPA60xyz PQ60010QPA60xyz PQ60010QPA60xyz PQ60010QPA60xyz PQ60010QPA45xyz Input Voltage 35 - 75 V 35 - 75 V 35 - 75 V 35 - 75 V 35 - 75 V 35 - 75 V Output Voltage 1.0 V 1.2 V 1.5 V 1.8 V 2.5 V 3.3 V Maximum Output Current 60 A 60 A 60 A 60 A 60 A 45 A 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. The following options must be included in place of the x y z spaces in the model numbers listed above. Options Description: x y z Enable Logic P - Positive N - Negative Pin Style K - 0.110" N - 0.145" R - 0.180" Y - 0.250" Feature Set S - Standard 2 - Two sets of Output Pins 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 rohs@synqor.com. Not all combinations make valid part numbers, please contact SynQor for availability. PATENTS SynQor holds the following patents, one or more of which might apply to this product: 5,999,417 6,594,159 6,927,987 7,119,524 6,222,742 6,731,520 7,050,309 7,269,034 6,545,890 6,894,468 7,072,190 7,272,021 6,577,109 6,896,526 7,085,146 7,272,023 Contact SynQor for further information: Phone: Toll Free: Fax: E-mail: Web: Address: 978-849-0600 888-567-9596 978-849-0602 power@synqor.com 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. Information furnished by SynQor is believed to be accurate and reliable. However, no responsibility is assumed by SynQor for its use, nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of SynQor. Product # PQ60018QPA60 www.synqor.com Doc.# 005-2QP618F Rev. B 09/24/08 Page 14