48 v 5.0 v 20 a

Technical Specification

PQ60050QGA20

Product # PQ60050QGA20 Phone 1-888-567-9596 www.synqor.com Doc.# 005-2QG650D Rev. F 10/22/19

The PQ60050QGA20 PowerQor® Giga 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 connections, it is extremely reliable.

PQ60050QGA20 Module• Highefficiency,>89%atfullratedloadcurrent• Deliversupto20Aofoutputcurrent(100W)with

minimal derating ‑ no heatsink required• Wideinputvoltagerange:35V–75V,with100V100ms

input voltage transient withstand• Fixedfrequencyswitchingprovidespredictable

EMI performance• Nominimumloadrequirementmeansnopreload

resistors required• SeetheBaseplate Addendum web page for more options.

Operational Features

• Inputunder-voltagelockoutdisablesconverteratlowinput voltage conditions

• Outputcurrentlimitandshortcircuitprotectionprotectsconverter from excessive load current or short circuits

• Outputover-voltageprotectionprotectsloadfromdamaging voltages

• Thermalshutdownprotectsconverterfromabnormalenvironmental conditions

Protection Features

• 2000V,10MΩinput-to-outputisolationprovidesinput/output ground separation

• UL/cUL60950-1recognized(US&Canada),basicinsulation rating

• TUVcertifiedtoEN60950-1• Meets72/23/EECand93/68/EECdirectiveswhich

facilitates CE Marking in user’s end product• BoardandplasticcomponentsmeetUL94V-0

flammability requirements

Safety Features• Industrystandardquarter-brickpin-outconfiguration• Industrystandardsize:1.45”x2.3”• Totalheightlessthan0.40”,permitsbetterairflowand

smaller card pitch• Totalweight:1.2oz(34g),lowermassgreatlyreduces

vibration and shock problems

Mechanical Features

• On/Offcontrolreferencedtoinputside(positiveandnegativelogicoptionsareavailable)

• Remotesensefortheoutputvoltagecompensatesforoutput distribution drops

• Outputvoltagetrimpermitscustomvoltagesandvoltage margining

Control Features

48 V 5.0 V 20 A 2000 V dc Quarther-brickInput Output Current Isolation DC-DC Converter

http://www.synqor.com/datasheets/PQxxxxxQGBxx_Datasheet.pdf


http://www.synqor.com/products-productfamilies.aspx



Input:Output:

Current:Package:

48 V5.0 V20 AQuarter-brick

NOTES1) Pins1-3,5-7are0.040"(1.02mm)diameterwith0.080"(2.03mm)diameterstandoffshoulders.

2) Pins4and8are0.062"(1.57mm)diameterwith0.100”(2.54mm)diameterstandoffshoulders.

3) Otherpinextensionlengthsavailable.Recommendedpinlengthis0.03"(0.76mm)greaterthanthePCBthickness.

4) AllPins:Material-CopperAlloyFinish-Tin/LeadoverNickelplate

5) Undimensionedcomponentsareshownforvisualreference only.

6) Alldimensionsininches(mm)Tolerances:x.xx+/-0.02in.(x.x+/-0.5mm)

x.xxx+/-0.010in.(x.xx+/-0.25mm)7) Weight:1.2oz(34g)typical8) Workmanship:MeetsorexceedsIPC-A-610CClassII9) UL/TUVstandardsrequireaclearancegreaterthan0.04"(1.02mm)betweeninputandoutputforBasicinsulation.Thisissue should be considered if any copper traces are on the topsideoftheuser’sboard.Notethattheferritecoresarecon‑sidered part of the input/primary circuit.

10) See the Baseplate Addendum for more options.

PinNo. Name Function1 Vin(+) Positiveinputvoltage2 ON/OFF TTLinputtoturnconverter

on and off, referenced to Vin(-),withinternalpullup.

3 Vin(-) Negativeinputvoltage4 Vout(-) Negativeoutputvoltage5 SENSE(-) Negativeremotesense1

6 TRIM Outputvoltagetrim2

7 SENSE(+) Positiveremotesense3

8 Vout(+) Positiveoutputvoltage

Notes:

1. Pin5mustbeconnectedtoVout(-).

2. LeavePin6openfornominaloutputvoltage.

3. Pin7mustbeconnectedtoVout(+).

PINCONNECTIONS

MECHANICAL DIAGRAM

0.40(10.2)

0.145 (3.68)

See Note 3

Top View

Side ViewMax. HeightBottom side Clearance

See Note 9

2.00 (50.8)2.30 (58.4)

0.43 (10.9)

0.300 (7.62)0.600

(15.24)

1.45 (36.8)

0.150 (3.81)

0.300 (7.62)

0.450 (11.43) 0.600

(15.24)

1

2

3 4

7

5

8

6

0.14 (3.6)

0.063+/-0.026(1.60+/-0.66)

Load BoardLowest Component





Input:Output:

Current:Package:


PQ60050QGA20 ELECTRICAL CHARACTERISTICS 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.

Parameter Min. Typ. Max. Units Notes & Conditions ABSOLUTE MAXIMUM RATINGS

Input VoltageNon-Operating 100 V continuousOperating 80 V continuousOperating Transient Protection 100 V 100ms transient

Isolation Voltage (input to output) 2000 V Basic level, Pollution Degree 2Operating Temperature -40 100 °CStorage Temperature -55 125 °CVoltage at ON/OFF input pin -2 18 V

INPUT CHARACTERISTICSOperating Input Voltage Range 35 48 75 VInput Under-Voltage Lockout

Turn-On Voltage Threshold 32 33 34 VTurn-Off Voltage Threshold 28.5 29.5 30.5 VLockout Hysteresis Voltage 2.5 3.5 4.5 V

Maximum Input Current 3.5 A 100% Load, 35 VinNo-Load Input Current 80 120 mADisabled Input Current 1.6 3 mAInrush Current Transient Rating 0.01 A2sResponse to Input Transient 150 mV 1000V/ms input transientInput Reflected-Ripple Current 3 mA P-P thru 10µH inductor; Figs. 13 & 15Recommended Input Fuse 20 A fast blow external fuse recommendedInput Filter Component Values (C\L) 2.46\4.7 µF\µH internal values, see Figure ERecommended External Input Capacitance 33 47 µF see Figure 13

OUTPUT CHARACTERISTICSOutput Voltage Set Point 4.950 5.000 5.050 VOutput Voltage Regulation

Over Line +0.05 \ 2 +0.2 \ 10 %\mVOver Load +0.05 \ 2 +0.2 \ 10 %\mVOver Temperature +25 +75 mV

Total Output Voltage Range 4.87 5.13 V over sample, line, load, temperature & lifeOutput Voltage Ripple and Noise 20MHz bandwidth; Fig. 13 & 16

Peak-to-Peak 50 100 mV Full Load, see Figures 13 & 16RMS 10 20 mV Full Load, see Figures 13 & 16

Operating Output Current Range 0 20 AOutput DC Current-Limit Inception 21 24 26 A Output Voltage 10% Low; Fig. 17Output DC Current-Limit Shutdown Voltage 3.1 VBack-Drive Current Limit while Enabled 0.5 1.0 2.0 A Negative current drawn from outputBack-Drive Current Limit while Disabled 0 10 50 mA Negative current drawn from outputMaximum Output Capacitance 6,000 µF 5.0Vout at 20A Resistive Load

DYNAMIC CHARACTERISTICSInput Voltage Ripple Rejection 71 dB 120 Hz; Fig. 20 Output Voltage During Load Current Transient

Step Change in Output Current (0.1A/µs) 200 mV 50% to 75% to 50% Iout max; Figure 11Step Change in Output Current (5A/µs) 200 mV 50% to 75% to 50% Iout max; Figure 12Settling Time 300 µs to within 1% Vout nom

Turn-On Transient Turn-On Time 4 8 ms Full load, Vout=90% nom.; Figs. 9 & 10Start-Up Inhibit Time 180 200 240 ms -40°C to +125°C; Figure FOutput Voltage Overshoot 0 % 10,000 µF load capacitance, Iout = 0A

EFFICIENCY100% Load 89 % Figures 1 - 450% Load 89 % Figures 1 - 4

TEMPERATURE LIMITS FOR POWER DERATING CURVESSemiconductor Junction Temperature 125 °C Package rated to 150°CBoard Temperature 125 °C UL rated max operating temp 130°CTransformer Temperature 125 °C See Figures 5 - 8 for derating curves

ISOLATION CHARACTERISTICSIsolation Voltage 2000 VIsolation Resistance 30 MWIsolation Capacitance 470 pF





Input:Output:

Current:Package:


Parameter P Min. Typ. Max. Units Notes & Conditions FEATURE CHARACTERISTICS

Switching Frequency 280 300 320 kHzON/OFF Control (Option P)

Off-State Voltage -2 0.8 VOn-State Voltage 2.4 18 V

ON/OFF Control (Option N)Off-State Voltage 2.4 18 VOn-State Voltage -2 0.8 V

ON/OFF Control (Either Option) Figures A, BPull-Up Voltage Vin/6.5 9.2 VPull-Up Resistance 40 kW

Output Voltage Trim Range -20 +10 % Measured across Pins 8 & 4; Figure COutput Voltage Remote Sense Range +10 % Measured across Pins 8 & 4Output Over-Voltage Protection 117 122 127 % Over full temp range; % of nominal VoutOver-Temperature Shutdown 125 °C Average PCB TemperatureOver-Temperature Shutdown Restart Hysteresis 10 °C

RELIABILITY CHARACTERISTICSCalculated MTBF (Telcordia) 2.8 106 Hrs. TR-NWT-000332; 80% load,300LFM, 40oC TaCalculated MTBF (MIL-217) 1.8 106 Hrs. MIL-HDBK-217F; 80% load, 300LFM, 40oC TaDemonstrated MTBF >25 106 Hrs. Field demonstrated MTBF

PQ60050QGA20 ELECTRICAL CHARACTERISTICS (continued)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.

STANDARDSCOMPLIANCE Parameter Notes & Conditions STANDARDS COMPLIANCE

UL/cUL60950-1 File#E194341,Basicinsulation

EN60950-1 CertifiedbyTUV

NeedleFlameTest(IEC695-2-2) Testonentireassembly;board&plasticcomponentsUL94V-0compliant

IEC61000-4-2 ESDtest,8kV-NP,15kVair-NP(NormalPerformance)

Note:Anexternalinputfusemustalwaysbeusedtomeetthesesafetyrequirements.ContactSynQorforofficialsafetycertificatesonnew releases or download from the SynQor website.

QUALIFICATIONTESTING Parameter # Units Test Conditions QUALIFICATION TESTING

LifeTest 32 95%ratedVinandload,unitsatderatingpoint,1000hours

Vibration 5 10-55Hzsweep,0.060"totalexcursion,1min./sweep,120sweepsfor3axis

Mechanical Shock 5 100gminimum,2dropsinxandyaxis,1dropinzaxis

Temperature Cycling 10 -40°Cto100°C,unittemp.ramp15°C/min.,500cycles

Power/Thermal Cycling 5 Toperating=mintomax,Vin=mintomax,fullload,100cycles

DesignMarginality 5 Tmin-10°CtoTmax+10°C,5°Csteps,Vin=mintomax,0-105%load

Humidity 5 85°C,85%RH,1000hours,continuousVinappliedexcept5min/day

Solderability 15pins MIL-STD-883,method2003




Input:Output:

Current:Package:


60

65

70

75

80

85

90

95

0 2 4 6 8 10 12 14 16 18 20Load Current (A)

Effic

ienc

y (%

)

36 Vin48 Vin75 Vin

Figure 1: Efficiency at nominal output voltage vs. load current for minimum, nominal, and maximum input voltage at 25°C.

82

83

84

85

86

87

88

89

90

0 100 200 300 400 500Air Flow (LFM)

Effic

ienc

y (%

)

25 C40 C55 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).

0

2

4

6

8

10

12

14

16

0 2 4 6 8 10 12 14 16 18 20Load Current (A)

Pow

er D

issi

patio

n (W

)

36 Vin48 Vin75 Vin

Figure 3: Power dissipation at nominal output voltage vs. load current for minimum, nominal, and maximum input voltage at 25°C.

5.0

5.5

6.0

6.5

7.0

7.5

8.0

8.5

9.0

9.5

10.0

0 100 200 300 400 500Air Flow (LFM)

Pow

er D

issi

patio

n (W

)

25 C40 C55 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).

Figure 5: Maximum output power derating curves vs. ambient air tem-perature for airflow rates of 0 LFM through 400 LFM with air flowing across the converter from pin 1 to pin 3 (nominal input voltage).

Figure 6: Thermal plot of converter at 15 amp load current with 55°C air flowing at the rate of 200 LFM. Air is flowing across the converter sideways from pin 1 to pin 3 (nominal input voltage).

0

2

4

6

8

10

12

14

16

18

20

0 25 40 55 70 85Ambient Air Temperature (oC)

Iout

(A)

400 LFM (2.0 m/s)300 LFM (1.5 m/s)200 LFM (1.0 m/s)100 LFM (0.5 m/s)0 LFM (0 m/s)

Semiconductor junction temperature is within 1°C of surface temperature





Input:Output:

Current:Package:


Figure 7: Maximum output power derating curves vs. ambient air tem-perature for airflow rates of 0 LFM through 400 LFM with air flowing lengthwise from input to output (nominal input voltage).

Figure 8: Thermal plot of converter at 15 amp load current with 55°C 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 load (resistive load), (2 ms/div). Ch1: Vout (2V/div)Ch2: ON/OFF input (5V/div)

Figure 10: Turn-on transient at zero load (2 ms/div).Ch1: Vout (2V/div)Ch2: 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/µs). Load cap: 10µF, 100 mΩ ESR tantalum capaci-tor and 1µF ceramic capacitor. Ch1: Vout (200mV/div), Ch2: Iout (5A/div).

Figure 12: Output voltage response to step-change in load current (50%-75%-50% of Iout(max): dI/dt = 5A/µs). Load cap: 470µF, 30 mΩ ESR tantalum capacitor and 1µF ceramic cap. Ch1: Vout (200mV/div), Ch2: Iout (5A/div).

Vin = 48V

Semiconductor junction temperature is within 1°C of surface temperature




Input:Output:

Current:Package:


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 cur-rent and nominal input voltage with 10µH source impedance and 47µF electrolytic capacitor (100 mA/div). See Figure 13.

Figure 15: Input reflected ripple current, is, through a 10 µH sourceinductor 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 (20 mV/div). Load capacitance: 1µF ceramic capacitor and 10µF tantalum capacitor. Bandwidth: 20 MHz. See Figure 13.

Figure 17: Output voltage vs. load current showing typical current limit curves and converter shutdown points.

Figure 18: Load current (10A/div) as a function of time when the converter attempts to turn on into a 10 mW short circuit. Top trace (2.5ms/div) is an expansion of the on-time portion of the bottom trace.

0.0

1.0

2.0

3.0

4.0

5.0

6.0

7.0

8.0

0 5 10 15 20Load Current (A)

Out

put V

olta

ge (V

)

36 V48 V75 V

10 µHsource

impedance

DC/DCConverter

Figure 15

Figure 14Figure 16

1 µF ceramic

capacitor

10 µF, 100mW ESR

tantalum capacitor

47 µF, <1W ESRelectrolytic capacitor

VSOURCE

iS iCVOUT





Input:Output:

Current:Package:


0.0001

0.001

0.01

0.1

1

10 100 1,000 10,000 100,000Hz

Out

put I

mpe

danc

e (W

)

36 Vin48 Vin75 Vin

Figure 19: Magnitude of incremental output impedance (Zout = vout/iout) for minimum, nominal, and maximum input voltage at full rated power.

-100

-90

-80

-70

-60

-50

-40

-30

-20

-10

0

10 100 1,000 10,000 100,000Hz

Forw

ard

Tran

smis

sion

(dB

)

36 Vin48 Vin75 Vin

Figure 20: Magnitude of incremental forward transmission (FT = vout/vin) for minimum, nominal, and maximum input voltage at full rated power.

-60

-50

-40

-30

-20

-10

0

10 100 1,000 10,000 100,000Hz

Rev

erse

Tra

nsm

issi

on (d

B)

36 Vin48 Vin75 Vin

Figure 21: Magnitude of incremental reverse transmission (RT = iin/iout)for minimum, nominal, and maximum input voltage at full rated power.

0.1

1

10

100

10 100 1,000 10,000 100,000Hz

Inpu

t Im

peda

nce

(W)

36 Vin48 Vin75 Vin

Figure 22: Magnitude of incremental input impedance (Zin = vin/iin)for minimum, nominal, and maximum input voltage at full rated power.




Input:Output:

Current:Package:


BASICOPERATIONANDFEATURESThe 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’soutput is accomplished with synchronous rectifiers. These devices, whichareMOSFETswithaverylowon-stateresistance,dissipatefarless 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 notrequire 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 eighth‑brick converters uses the industry standard footprint and pin‑out configuration.

See Product Summary web page for options.

CONTROLFEATURESREMOTE ON/OFF (Pin 2):TheON/OFF input,Pin2,permits theuser to control when the converter is on or off. This input is refer‑encedtothereturnterminaloftheinputbus,Vin(-).Therearetwoversions of the converter that differ by the sense of the logic used fortheON/OFFinput.

Inthepositivelogicversion,theON/OFFinputisactivehigh(meaningthatahighturnstheconverteron).Inthenegativelogicversion,theON/OFFsignalisactivelow(meaningthatalowturnstheconverteron).FigureAdetailsfivepossiblecircuitsfordrivingtheON/OFFpin.FigureBisadetailedlookoftheinternalON/OFFcircuitry.

REMOTE SENSE(+) (Pins 7 and 5):TheSENSE(+)inputscorrectfor voltage drops along the conductors that connect the converter’s output pins to the load.

Pin7shouldbeconnectedtoVout(+)andPin5shouldbeconnectedtoVout(-)at thepointon theboardwhereregulation isdesired.Aremote 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(-)] < SenseRange%xVout

Pins7and5mustbeconnectedforproperregulationoftheoutputvoltage. 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 voltageacrosstheoutput(pins8and4)todeterminewhenitshouldtrigger,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 thatoutputOVPdoesnottrigger,evenduringloadtransients.

Open Collector Enable Circuit

Figure A: Various circuits for driving the ON/OFF pin. Figure B: Internal ON/OFF pin circuitry

Remote Enable Circuit

Direct Logic Drive

Negative Logic(Permanently Enabled)

Positive Logic(Permanently Enabled)

ON/OFF

Vin(_)

ON/OFF

ON/OFF

Vin(_)

ON/OFF

5V

TTL/CMOS

Vin(_)

ON/OFF

Vin(_)

Vin(_)

TTL

5V

50k

274k

Vin(+)

ON/OFF

Vin(_)

50k100pF





Input:Output:

Current:Package:


OUTPUT VOLTAGE TRIM (Pin 6): The TRIM input permits theuser 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 betweenPin6andPin5(SENSE(-)input).Foradesireddecreaseofthe nominal output voltage, the value of the resistor should be

Rtrim‑down = (511) -10.22 (kΩ)∆%where

∆% = Vnominal–Vdesired x100%Vnominal

To increase the output voltage, the user should connect a resistor betweenPin6andPin7(SENSE(+)input).Foradesiredincreaseofthe nominal output voltage, the value of the resistor should be

Rtrim‑up = ( 5.11VOUT(100+∆%) _ 511 _ 10.22)(kW)1.225∆% ∆%where

VOUT=NominalOutputVoltage

FigureCgraphstherelationshipbetweenthetrimresistorvalueandRtrim-upandRtrim-down,showingthetotalrangetheoutputvoltage can be trimmed up or down.

Figure C: Trim Graph for 5.0 Vout module

Note: the TRIM feature does not affect the voltage at which theoutput 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.

Total DC Variation of Vout: For the converter to meet its fullspecifications,themaximumvariationoftheDCvalueofVout,duetoboth trimming and remote load voltage drops, should not be greater than that specified for the output voltage trim range.

PROTECTIONFEATURESInput Under-Voltage Lockout:Theconverterisdesignedtoturnoff when the input voltage is too low, helping avoid an input system instability problem, described in more detail in the application note titled“InputSystemInstability”.Thelockoutcircuitryisacompara-tor with DC hysteresis. When the input voltage is rising, it mustexceedthetypicalTurn-OnVoltageThresholdvalue(listedonthespecificationpage)beforetheconverterwillturnon.Oncethecon-verterison,theinputvoltagemustfallbelowthetypicalTurn-OffVoltageThresholdvaluebeforetheconverterwillturnoff.

Output Current Limit:Themaximumcurrent limit remainscon-stant as the output voltage drops.However, once the impedanceof the short across the output is small enough to make the output voltagedropbelowthespecifiedOutputDCCurrent-LimitShutdownVoltage,theconverterturnsoff.

The converter then enters a “hiccup mode” where it repeatedlyturnsonandoffata5Hz(nominal)frequencywitha5%dutycycleuntil the short circuit condition is removed. This prevents excessive heating of the converter or the load board.

Output Over-Voltage Limit:IfthevoltageacrosstheoutputpinsexceedstheOutputOver-VoltageProtectionthreshold,theconverterwill immediately stop switching. This prevents damage to the load circuitdueto1)excessiveseriesresistanceinoutputcurrentpathfromconverteroutputpinstosensepoint,2)areleaseofashort-circuitcondition,or3)a releaseofacurrent limitcondition.Loadcapacitance 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 theconverter senses the average temperature of the module. The thermal shutdown circuit is designed to turn the converter off when thetemperatureatthesensedlocationreachestheOver-TemperatureShutdown value. It will allow the converter to turn on again when the temperatureofthesensedlocationfallsbytheamountoftheOver-TemperatureShutdownRestartHysteresisvalue.

100,000

10,000

1,000

100

100 2 4 6 8 10 12 14 16 18 20

Trim

Res

ista

nce

(kO

hms)

% decrease Vout% increase Vout






Input:Output:

Current:Package:


APPLICATIONCONSIDERATIONSInput System Instability: This condition can occur because any DC/DCconverterappearsincrementallyasanegativeresistanceload.Adetailedapplicationnotetitled“InputSystemInstability”is available on the SynQor web site (www.synqor.com) whichprovides an understanding of why this instability arises, and shows the preferred solution for correcting it.

Application Circuits: Figure D below provides a typical circuitdiagram which details the input filtering and voltage trimming.

Input Filtering and External Capacitance: Figure E belowprovides 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 inthe“InputCharacteristics”section.Moredetailedinformationisavailableintheapplicationnotetitled“EMICharacteristics”ontheSynQor website.

Startup Inhibit Period: The Startup Inhibit Period ensures that the converter will remain off for approximately 200ms when it is shutdownforanyreason.Whenanoutputshort ispresent,thisgeneratesa5Hz“hiccupmode,”whichpreventstheconverterfromoverheating. In all, there are seven ways that the converter can be shutdown,initiatingaStartupInhibitPeriod:

• InputUnder-VoltageLockout

• InputOver-VoltageShutdown(notpresentinQuarter-brick)

• OutputOver-VoltageProtection

• OverTemperatureShutdown

• CurrentLimit

• ShortCircuitProtection

• TurnedoffbytheON/OFFinput

VinExternal

InputFilter

Trim

Vin(+)

IloadCload

L

Vout(+)

Rtrim-upor

Rtrim-down

Vsense(+)

ON/OFF

Vin(_)

Vin(+)

Vin(_)

Vout(_)

Vsense(_)

Electrolytic Capacitor

33µF

ESR ≅ 1Ω

Figure D: Typical application circuit (negative logic unit, permanently enabled).

Figure E: Internal Input Filter Diagram (component values listed on page 3).

C







Input:Output:

Current:Package:


FigureFshowsthreeturn-onscenarios,whereaStartupInhibitPeriod is initiated at t0, t1, and t2:

Before time t0,whentheinputvoltageisbelowtheUVLthresh-old,theunitisdisabledbytheInputUnder-VoltageLockoutfea-ture.WhentheinputvoltagerisesabovetheUVLthreshold,theInputUnder-VoltageLockout is released,andaStartupInhibitPeriodis initiated.Attheendofthisdelay,theON/OFFpinisevaluated, and since it is active, the unit turns on.

At time t1,theunitisdisabledbytheON/OFFpin,anditcannotbe 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-OnTime.

Figure F: Startup Inhibit Period (turn-on time not to scale)

Under-Voltage Lockout Turn-On

Threshold

ON/OFF(pos logic)

Vout

Vin

200ms 200ms

200ms(typical start-up inhibit period)

t0 t1 t2 t

4ms (typicalturn on time)

ON ON ONOFF OFF




Input:Output:

Current:Package:


PART NUMBERING SYSTEM

The part numbering system for SynQor’s dc‑dc converters follows the format shown in the example below.

Thefirst12characterscomprise thebasepartnumberandthe last 3 characters indicate available options. The “-G”suffixindicates6/6RoHScompliance.

Application Notes

A variety of application notes and technical white papers can be downloaded in pdf format from our website.

RoHS Compliance:TheEUledRoHS(RestrictionofHazardousSubstances) Directive bans the use of Lead, Cadmium,Hexavalent Chromium, Mercury, Polybrominated Biphenyls(PBB), andPolybrominatedDiphenyl Ether (PBDE) inElectricaland Electronic Equipment. This SynQor product is 6/6 RoHScompliant. For more information please refer to SynQor’sRoHSaddendumavailableatourRoHSCompliance/LeadFreeInitiative web page or e‑mail us at [email protected].

ORDERING INFORMATION

The tables below show the valid model numbers and ordering optionsforconvertersinthisproductfamily.WhenorderingSynQor converters, please ensure that you use the complete 15 character part number consisting of the 12 characterbase part number and the additional characters for options. Add“-G”tothemodelnumberfor6/6RoHScompliance.

The following options must be included in place of the w x y z spaces in the model numbers listed above.

Not all combinationsmake valid part numbers, please contactSynQor for availability. See the Product Summary web page for more options.

Product Family

Package SizePerformance Level

Thermal Design

Output Current

6/6 RoHS

Options (seeOrdering Information)

Input Voltage

Output Voltage

Contact SynQor for further information:

Phone: 978-849-0600TollFree: 888-567-9596Fax: 978-849-0602E‑mail: [email protected]: www.synqor.comAddress: 155SwansonRoad

Boxborough,MA01719USA

PQ 60 050 Q G A 20 NKS - G

Model Number Input Voltage Output Voltage Maximum Output Current

PQ60015QGA25xyz-G 35 - 75 V 1.5 V 25 APQ60018QGA25xyz-G 35 - 75 V 1.8 V 25 APQ60020QGA25xyz-G 35 - 75 V 2.0 V 25 APQ60025QGA25xyz-G 35 - 75 V 2.5 V 25 APQ60033QGA25xyz-G 35 - 75 V 3.3 V 25 APQ60050QGA20xyz-G 35 - 75 V 5.0 V 20 APQ60060QGA17xyz-G 35 - 75 V 6.0 V 16.7 APQ60120QGA08xyz-G 35 - 75 V 12 V 8.3 APQ60150QGA07xyz-G 35 - 75 V 15 V 6.7 APQ60180QGA06xyz-G 35 - 75 V 18 V 5.6 APQ65180QGA06xyz-G 40 - 75 V 18 V 5.6 A

Options Description: x y zEnable Logic Pin Style Feature Set

P - PositiveN - Negative

K - 0.110" N - 0.145" R - 0.180" Y - 0.250"

S - Standard

PATENTS SynQor holds numerous U.S. patents, one or more of which apply to most of its power conversion 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. SynQorôs patents include the following:

6,545,890 6,894,468 6,896,526 6,927,987 7,050,309 7,085,146

7,119,524 7,765,687 7,787,261 8,149,597 8,644,027

WARRANTYSynQor offers a three (3) year limited warranty. Complete warranty information is listed on our website or is available upon request from SynQor.


http://www.synqor.com/products-lead-free.html

http://www.synqor.com/products-lead-free.html

mailto:[email protected]

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