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Technical Specification
PQ60050QTA30
48Vin
Input
5.0Vout
Output
30Amp
Current
2000Vdc
Isolation
Quarter-brick
DC/DC Converter
The PQ60050QTA30 PowerQor(R) Tera 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 Tera series offers the maximum useable output current for any standard "quarter-brick" module. RoHS compliant
(see page 13).
PQ60050QTA30 Module
Protection Features
* Inputunder-voltagelockoutdisablesconverteratlow input voltage conditions * Outputcurrentlimitandshortcircuitprotection protects converter and load from permanent damage and consequent hazardous conditions * Activebackbiaslimitpreventsdamagetoconverter from external load induced pre-bias * Outputover-voltageprotectionprotectsloadfrom damaging voltages * Thermalshutdownprotectsconverterfromabnormal environmental conditions
Operational Features
* Ultra-highefficiency,>90%atfullratedloadcurrent * Deliversupto30ampsofoutputcurrent(150W)with minimal derating - no heatsink required * Wideinputvoltagerange:35-75V,with100V100ms input voltage transient capability * FixedfrequencyswitchingprovidespredictableEMI performance * Nominimumloadrequirementmeansnopreload resistors required
Mechanical Features
* Industrystandardquarter-brickpin-outconfiguration * Industrystandardsize:1.45"x2.3"(36.8x58.4mm) * Totalheightlessthan0.43"(10.9mm),permitsbetter airflow and smaller card pitch * Totalweight:1.5oz.(42grams) * Flangedpinsdesignedtopermitsurfacemount soldering(avoidwavesolder)usingFPiPtechnique
Safety Features
*2000V,30Minput-to-outputisolation *UL60950-1:2003,basicinsulation *CAN/CSA-C22.2No.60950-1:2003 *EN60950-1:2001 *RoHScompliant(seepage13)
Control Features
* On/Offcontrolreferencedtoinputside(positiveand negative logic options are available) * Remotesensefortheoutputvoltagecompensatesfor output distribution drops * Outputvoltagetrimpermitscustomvoltagesand voltage margining
Product # PQ60050QTA30 Phone 1-888-567-9596
Contents
MechanicalDiagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 PQ60050QTD30ELECTRICALCHARACTERISTICS . . . . . . . . . . . . . . . . . 3STANDARDSCOMPLIANCE&QUALIFICATIONTESTING . . . . . . . . . . . . . 4 Figures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-8 Application section. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-12 OrderingInformation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Doc.# 005-2QT650C Rev. E 05/20/09 Page 1
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Technical Specification
Mechanical Diagram
Top View
0.145
(3.68)
Input: Output: Current: Package:
35-75 V 5.0 V 30 A Quarter-brick
Side View
0.600
(15.24)
0.450
(11.43)
.43
(10.9)
0.300
(7.62)
0.150
(3.81)
0.145
(3.68) See Note 3
8765 4
2.00
(50.8)
2.30
(58.4)
.14
(3.6)
1
2
3
.43
(10.9)
.300
(7.62)
PIN FARSIDE TYPICAL SEE NOTES 1, 2, AND 4 0.600
(15.24)
0.060 +.022/-.032
(1.52 +.55/-.81) BOTTOMSIDE CLEARANCE
NOTES
1)Pins1-3,5-7are0.040"(1.02mm)diameterwith 0.080"(2.03mm)diameterstandoffshoulders. 2)Pins4and8are0.062"(1.57mm)diameterwith0.100" (2.54mm)diameterstandoffshoulders. 3)Otherpinextensionlengthsavailable. 4)AllPins:Material-CopperAlloy Finish-MatteTinoverNickelplate 5)Undimensionedcomponentsareshownforvisualreferenceonly. 6) All dimensions in inches (mm) Tolerances: x.xx+/-0.02in.(x.x+/-0.5mm) x.xxx+/-0.010in.(x.xx+/-0.25mm) 7)Weight:2.4oz.(68g)typical 8)Workmanship:MeetsorexceedsIPC-A-610CClassII 9)UL/TUVstandardsrequireaclearancegreaterthan0.04" (1.02mm)betweeninputandoutputforBasicinsulation.This issue should be considered if any copper traces are on the top side oftheuser'sboard.Notethattheferritecoresareconsideredpart of the input/primary circuit. 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 # PQ60050QTA30 Phone 1-888-567-9596
PIN DESIGNATIONS
Pin Name Function
1 2 3 4 5 6 7 8
Vin(+)
Positive input voltage
ON/OFF TTL input to turn converter on and off, referenced to Vin(-), with internal pull up. Vin(-) Vout(-) SENSE(-) TRIM Negative input voltage Negative output voltage Negative remote sense see note 1 Output voltage trim see note 2
SENSE(+) Positive remote sense see note 3 Vout(+) Positive output voltage
1)SENSE(-)shouldbeconnectedtoVout(-)eitherremotelyorattheconverter 2)LeaveTRIMpinopenfornominaloutputvoltage. 3)SENSE(+)shouldbeconnectedtoVout(+)eitherremotelyorattheconverter
Doc.# 005-2QT650C Rev. E 05/20/09 Page 2
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Technical Specification
PQ60050QTD30 ELECTRICAL CHARACTERISTICS
Parameter
ABSOLUTE MAXIMUM RATINGS
Input: Output: Current: Package:
35-75 V 5.0 V 30 A Quarter-brick
TA=25C, airflow rate=300 LFM, Vin=48Vdc unless otherwise noted; full operating temperature range is -40C to +100C ambient temperature with appropriate power derating. Specifications subject to change without notice.
Min. Typ. Max.
100 80 100 2000 100 125 18 48 34 31.5 3.5 70 1.6 500 7 185 2.0\6.6 47 4.950 5.000 75 35 32.5 4.5 5.5 120 3 0.01
Units
V V V V C C V V V V V A mA mA A 2s mV mA mA A H\F F V %\mV %\mV mV V mV mV A A V A mA F dB mV mV s
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
-40 -55 -2 35 33 30.5 2.5
100% Load, 35 Vin, trim up, in current limit
7
OUTPUT CHARACTERISTICS
1000V/ms input transient P-P thru 10H inductor; Figures 13 & 15 RMS; Figures 13 & 14 Fast blow external fuse recommended Internal values; see Figure E Typical ESR 0.1-0.2W; see Figure 13
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 Input Voltage Ripple Rejection Output Voltage during Load Current Transient For a Step Change in Output Current (0.1A/s) For a Step Change in Output Current (1A/s) Settling Time Turn-On Transient Turn-On Time Start-Up Inhibit Time Output Voltage Overshoot 100% Load 50% Load
5.050
4.87
+0.05 \ 2 +0.2 \ 10 +0.05 \ 2 +0.2 \ 10 +25 +75 5.13 50 10 36.5 3.2 1.3 10 60 200 200 400 100 20 30 39 2.5 50 9,800
0 33 0.5 0
Over sample, line, load, temperature & life 500MHz bandwidth; Figures 13 & 16 Full Load; see Figures 13 & 16 Full Load; see Figures 13 & 16 Subject to thermal derating; Figures 5 - 8 Output Voltage 10% Low; Figure 17 Negative current drawn from output Negative current drawn from output 5.0Vout at 30A Resistive Load 120 Hz; Figure 20 50% to 75% to 50% Iout max; Figure 11 50% to 75% to 50% Iout max; Figure 12 To within 1% Vout nom Full load, Vout=90% nom.; Figures 9 & 10 -40C to +125C; Figure F 9,800 F load capacitance, Iout = 0A Figures 1 - 4 Figures 1 - 4 Package rated to 150C UL rated max operating temp 130C See Figures 5 - 8 for derating curves
6 180
EFFICIENCY
9.2 200 0 90 91
12 240
ms ms % % %
TEMPERATURE LIMITS FOR POWER DERATING CURVES
ISOLATION CHARACTERISTICS
Semiconductor Junction Temperature Board Temperature Transformer Temperature Isolation Voltage (dielectric strength) Isolation Resistance Isolation Capacitance2
125 125 125 2000 30 470
C C C V MW pF
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 # PQ60050QTA30
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Doc.# 005-2QT650C Rev. E
05/20/09
Page 3
Technical Specification
ELECTRICAL CHARACTERISTICS (Continued)
Parameter P
FEATURE CHARACTERISTICS
Input: Output: Current: Package:
35-75 V 5.0 V 30 A Quarter-brick
Min.
250 -2 2.4 2.4 -2
Typ.
280
Max.
310 0.8 18 18 0.8
Units
kHz V V V V V kW % % % C C
6
Notes & Conditions
Regulation 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
-20 117
Vin/6.5 40 122 125 10 857 2.1 1.75
9.2 +10 +10 127
Figures A & B Measured across Pins 8 & 4; Figures 23 & C Measured across Pins 8 & 4 Over full temp range; % of nominal Vout Average PCB Temperature See App Note: Output Load Current Calc.
10 Hrs. TR-NWT-000332; 80% load,300LFM, 40oC Ta 106 Hrs. MIL-HDBK-217F; 80% load, 300LFM, 40oC Ta 106 Hrs. See our website for details
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 60950-1 EN60950-1 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
95% rated Vin and load, units at derating point, 1000 hours
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
100g minimum, 2 drops in x and y axis, 1 drop in z axis -40C to 100C, unit temp. ramp 15C/min., 500 cycles Toperating = min to max, Vin = min to max, full load, 100 cycles Tmin-10C to Tmax+10C, 5C steps, Vin = min to max, 0-105% load 85C, 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 the factory for official product family qualification documents.
Product # PQ60050QTA30
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Doc.# 005-2QT650C Rev. E
05/20/09
Page 4
Technical Specification
100 95 90
92 94
Input: Output: Current: Package:
35-75 V 5.0 V 30 A Quarter-brick
93
Efficiency (%)
85 80 75 70 65 0 5 10 15 Load Current (A) 20 25 30
Efficiency (%)
91
90
35 Vin 48 Vin 75 Vin
89
25 C 40 C 55 C
88 0 100 200 300 400 500 Air Flow (LFM)
Figure 1: Efficiency at nominal output voltage vs. load current for minimum, nominal, and maximum input voltage at 25C.
Figure 2: Efficiency at nominal output voltage and 60% rated power vs. airflow rate for ambient air temperatures of 25C, 40C, and 55C (nominal input voltage).
10.0
18 16
9.0
14
Power Dissipation (W)
12 10 8 6 4 2 0 0 5 10 15 Load Current (A) 20 25 30
Power Dissipation (W)
8.0
7.0
6.0
35 Vin 48 Vin 75 Vin
25 C
5.0
40 C 55 C
4.0 0 100 200 300 Air Flow (LFM) 400 500
Figure 3: Power dissipation at nominal output voltage vs. load current for minimum, nominal, and maximum input voltage at 25C.
Figure 4: Power dissipation at nominal output voltage and 60% rated power vs. airflow rate for ambient air temperatures of 25C, 40C, and 55C (nominal input voltage).
30
25
20
Iout (A)
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) 50 LFM (0.25 m/s)
10
5
0 0 25 40 55 70 85
Ambient Air Temperature (oC)
Semiconductor junction temperature is within 1C of surface temperature
Figure 5: Maximum output power derating curves vs. ambient air temperature for airflow rates of 50 LFM through 400 LFM with air flowing across the converter from pin 3 to pin 1 (nominal input voltage).
Product # PQ60050QTA30 Phone 1-888-567-9596
Figure 6: Thermal plot of converter at 29 amp load current (145W) with 55C air flowing at the rate of 200 LFM. Air is flowing across the converter from pin 3 to pin 1 (nominal input voltage).
Doc.# 005-2QT650C Rev. E 05/20/09 Page 5
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Technical Specification
30
Input: Output: Current: Package:
35-75 V 5.0 V 30 A Quarter-brick
25
20
Iout (A)
15
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) 50 LFM (0.25 m/s)
5
0 0 25 40 55 70 85 Ambient Air Temperature (oC)
Semiconductor junction temperature is within 1C of surface temperature
Figure 7: Maximum output power derating curves vs. ambient air temperature for airflow rates of 50 LFM through 400 LFM with air flowing across the converter from input to output (nominal input voltage).
Figure 8: Thermal plot of converter at 26.5 amp load current (133W) with 55C air flowing at the rate of 200 LFM. Air is flowing across the converter from input to output (nominal input voltage).
Figure 9: Turn-on transient at full rated load (resistive load) (2 ms/div) Input voltage pre-applied. Ch 1: Vout (2V/div). Ch 2: ON/OFF input (5V/div)
Figure 10: Turn-on transient at zero load current (2 ms/div). Ch 1: Vout (2V/div) Ch 2: ON/OFF input (5V/div)
Figure 11: Output voltage response to step-change in load current (50%-75%50% of Iout(max); dI/dt = 0.1A/s). Load cap: 10F, 100 mW ESR tantalum cap and 1F ceramic capacitor. Ch 1: Vout (500mV/div), Ch 2: Iout (10A/div).
Product # PQ60050QTA30 Phone 1-888-567-9596
Figure 12: Output voltage response to step-change in load current (50%-75%50% of Iout(max): dI/dt = 5A/s). Load cap: 470F, 30 mW ESR tantalum capacitor and 1F ceramic cap. Ch 1: Vout (500mV/div), Ch 2: Iout (10A/div).
Doc.# 005-2QT650C Rev. E 05/20/09 Page 6
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Technical Specification
See Fig. 15 10 H See Fig. 14 See Fig. 16
Input: Output: Current: Package:
35-75 V 5.0 V 30 A Quarter-brick
source impedance
iS
iC
47 F, @1W ESR
DC/DC Converter 1 F
VOUT
VSOURCE
electrolytic capacitor
ceramic capacitor
10 F, 100mW ESR
tantalum capacitor
Figure 13: Test set-up diagram showing measurement points for Input Terminal Ripple Current (Figure 14), Input Reflected Ripple Current (Figure 15) and Output Voltage Ripple (Figure 16).
Figure 14: Input Terminal Ripple Current, ic, at full rated output current and nominal input voltage with 10H source impedance and 47F electrolytic capacitor (200 mA/div). See Figure 13.
Figure 15: Input reflected ripple current, is, through a 10 H source inductor at nominal input voltage and rated load current (10 mA/div). See Figure 13.
Figure 16: Output voltage ripple at nominal input voltage and rated load current (50 mV/div). Load capacitance: 1F ceramic capacitor and 10F tantalum capacitor. Bandwidth: 500 MHz. See Figure 13.
Figure 17: Output voltage vs. load current showing typical current limit curves and converter shutdown points.
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Figure 18: Load current (20A/div) as a function of time when the converter attempts to turn on into a 1 mW short circuit. Top trace (2ms/div) is an expansion of the on-time portion of the bottom trace.
Doc.# 005-2QT650C Rev. E 05/20/09 Page 7
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Technical Specification
0.1
0 -10 -20
Input: Output: Current: Package:
35-75 V 5.0 V 30 A Quarter-brick
35 Vin 48 Vin 75 Vin
Forward Transmission (dB)
Output Impedance (ohm)
0.01
-30 -40 -50 -60 -70 -80 -90 -100
0.001
35 Vin 48 Vin 75 Vin
0.0001 10 100 1,000 Hz 10,000 100,000
10
100
1,000 Hz
10,000
100,000
Figure 19: Magntiude of incremental output impedance (Zout = vout/iout) for minimum, nominal, and maximum input voltage at full rated power.
Figure 20: Magnitude of incremental forward transmission (FT = vout/vin) for minimum, nominal, and maximum input voltage at full rated power.
0 -5 -10
100
Reverse Transmission (dB)
Input Impedance (ohm)
-15 -20 -25 -30 -35 -40 -45 -50 10 100 1,000 Hz 10,000 100,000
10
1
35 Vin 48 Vin 75 Vin
0.1 10
35 Vin 48 Vin 75 Vin
100 1,000 Hz 10,000 100,000
Figure 21: Magnitude of incremental reverse transmission (RT = iin/iout) for minimum, nominal, and maximum input voltage at full rated power.
Figure 22: Magnitude of incremental input impedance (Zin = vin/iin) for minimum, nominal, and maximum input voltage at full rated power.
10 9 8
Vout Trim-up (%)
7 6 5 4 3 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)
100% Load 50% Load 0% Load
Figure 23: Achievable trim-up percentage vs. input voltage. at output loads of 0%, 50% and full load.
Product # PQ60050QTA30
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Doc.# 005-2QT650C Rev. E
05/20/09
Page 8
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 and quarter-brick converters uses the industry standard footprint and pin-out configuration.
Input: Output: Current: Package:
CONTROL FEATURES
35-75 V 5.0 V 30 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 7 and 5): The SENSE(+) inputs correct for voltage drops along the conductors that connect the converter's output pins to the load. Pin 7 should be connected to Vout(+) and Pin 5 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 7 and 5 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 higher than its specified value. Note: the output over-voltage protection circuit senses the voltage across the output (pins 8 and 4) to determine when it should trigger, not the voltage across the converter's sense leads (pins 7 and 5). 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(_) RemoteEnableCircuit
Vin(_) NegativeLogic (PermanentlyEnabled)
Vin(_) PositiveLogic (PermanentlyEnabled)
Vin(+)
274k ON/OFF 50k
5V
ON/OFF
5V ON/OFF
TTL
TTL/ CMOS
100pF 50k
Vin(_)
Vin(_)
Vin(_) OpenCollectorEnableCircuit
DirectLogicDrive
Figure B: Internal ON/OFF pin circuitry
Figure A: Various circuits for driving the ON/OFF pin.
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Technical Specification
OUTPUT VOLTAGE TRIM (Pin 6): 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 6 and Pin 5 (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 5.0 V 30 A Quarter-brick
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.
511 - 10.22 (kW) Rtrim-down = D%
where
()
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. 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 Vnominal
x 100%
To increase the output voltage, the user should connect a resistor between Pin 6 and Pin 7 (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.
100,000
Trim Resistance (kOhms)
10,000
1,000
100
10 0 2 4 6 8 10 12 14 16 18 20
% increase Vout
% decrease Vout
Figure C: Trim Graph for 5.0Vout 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. It is not necessary for the user to add capacitance at the Trim pin. The node is internally bypassed to eliminate noise.
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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: Output: Current: Package:
35-75 V 5.0 V 30 A Quarter-brick
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 electrolytic input capacitor. The recommended external input capacitance is specified in the "Input Characterisitcs" section. More detailed information is available in the application note titled "EMI Characteristics" on the SynQor website.
Vin(+) External Input Filter
Electrolytic Capacitor
Vout(+) Vsense(+) Rtrim-up
or
Vin
ON/OFF
Trim
Vsense(_) Vin(_) Vout(_)
Rtrim-down
Cload
Iload
Figure D: Typical application circuit (negative logic unit, permanently enabled).
Vin(+) C1 Vin(_) C2
Figure E: Internal Input Filter Diagram (component values
listed on page 3).
Product # PQ60050QTA30
Phone 1-888-567-9596
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Doc.# 005-2QT650C Rev. E
05/20/09
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Technical Specification
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
Input: Output: Current: Package:
35-75 V 5.0 V 30 A Quarter-brick
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. 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 # PQ60050QTA30
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-2QT650C Rev. E
05/20/09
Page 12
Technical Specification
PART NUMBERING SYSTEM
The part numbering system for SynQor's dc-dc converters follows the format shown in the example below.
PQ 6 0 0 5 0 Q T A 3 0 N K S - G 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 5.0 V 30 A Quarter-brick
The tables below show the valid model numbers and ordering optionsforconvertersinthisproductfamily.Whenordering 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"tothemodelnumberfor6/6RoHScompliance.
Model Number PQ60010QTA40xyz PQ60012QTA40xyz PQ60015QTA40xyz PQ60018QTA40xyz PQ60025QTA40xyz PQ60033QTA35xyz PQ60050QTA30xyz PQ60120QTA12xyz Continuous Input Output Voltage Maximum Output Current Voltage 35-75V 1.0V 40A 35-75V 1.2V 40A 35-75V 1.5V 40A 35-75V 1.8V 40A 35-75V 2.5V 40A 35-75V 3.3V 35A 35-75V 5V 30A 35-75V 12V 12A
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
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.
Enable Logic P - Positive N - Negative
Pin Length K - 0.110" N - 0.145" R - 0.180" Y - 0.250"
Feature Set
S - Standard
Application Notes
A variety of application notes and technical white papers can be downloaded in pdf format from our website.
RoHS Compliance:TheEUledRoHS(RestrictionofHazardous 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 RoHSCompliance/LeadFree Initiativewebpage or e-mail us at rohs@synqor.com.
Not all combinations make valid part numbers, please contact SynQor for availability. See the Product Summary web page for more options.
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: TollFree: Fax: E-mail: Web: Address:
978-849-0600 888-567-9596 978-849-0602 power@synqor.com www.synqor.com 155SwansonRoad Boxborough,MA01719 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. InformationfurnishedbySynQorisbelievedtobeaccurateandreliable. 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 fromitsuse.Nolicenseisgrantedbyimplicationorotherwiseunderany patent or patent rights of SynQor.
Product # PQ60050QTA30
www.synqor.com
Doc.# 005-2QT650C Rev. E
05/20/09
Page 13

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