View PQ60120QEA25PKS-G_4548931.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

PQ60120QEx25
35-75V
Input
Technical Specification
12V
Output
25Amp
Current
2250Vdc
Isolation
Quarter-brick
DC/DC Converter
The PQ60120QEA25 PowerQor(R) Exa quarter-brick converter is a next-generation, board-mountable, isolated, fixed switching frequency DC/DC converter. The Exa series offers industry leading power density for standard isolated DC/DC converters with both a wide input range and a tightly regulated output. Targeted for use in intermediate bus architectures, this module supplies an isolated step down voltage from 35-75V to 12V and provides more available power and higher efficiency than most competitive bus converters. This converter is available in open-frame and baseplated versions. RoHS Compliant (see page 13). Operational Features
* Ultra-highefficiency,>96%atfullratedloadcurrent, >96.5%athalfratedloadcurrent * Deliversupto25Aofoutputcurrent(300W)withminimal derating-noheatsinkrequired * Wideinputvoltagerange:35V-75V,with100V100ms inputvoltagetransientcapability * Fixedfrequencyswitchingprovidespredictable EMIperformance * Nominimumloadrequirement-nopreloadresistorsrequired * Wideoutputvoltagetrimrange(-50%to+5%)
PQ60120QEA25 Module
Protection Features
* Inputunder-voltagelockoutdisablesconverteratlow inputvoltageconditions * Outputcurrentlimitandshortcircuitprotectionprotects converterandloadfromdamageandconsequenthazardous conditions * Activebackbiaslimitprovidessmoothstartupwith externalloadinducedpre-bias * Latchingoutputover-voltageprotectionprotectsload fromdamagingvoltages * Thermalshutdownprotectsconverterfromabnormal environmentalconditions
Mechanical Features
* Industrystandardquarter-brickpin-outconfiguration * Industrystandardsize:1.45"x2.3"(36.8x58.4mm) * Totalheightlessthan0.436"(11.06mm),permitsbetter airflowandsmallercardpitch * Totalweight:1.5oz.(42grams) * Openframeunitshaveflangedpinsdesignedtopermit surfacemountsoldering(avoidwavesolder)using FPiPtechnique
Control Features
* On/Offcontrolreferencedtoinputside(positiveand negativelogicoptionsareavailable)
Safety Features
* 2250Vinput-to-outputisolation * UL60950-1:2003,basicinsulation * CAN/CSA-C22.2No.60950-1:2003 * EN60950-1:2001 * RoHScompliant(seepage13)
Product # PQ60120QEA25 Phone 1-888-567-9596
Contents
MECHANICALDIAGRAM(openframe) . . . . . . . . . . . . . . . . . . . . . . . . . 2 MECHANICALDIAGRAM(base-plated). . . . . . . . . . . . . . . . . . . . . . . . . 3 PQ60120QEA25ElectricalCharacteristics . . . . . . . . . . . . . . . . . . . . . 4-5 STANDARDSCOMPLIANCEQUALIFICATIONTESTING . . . . . . . . . . . . . 5 PQ60120QEA25Figures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-8 APPLICATIONSECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-12 ORDERINGINFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
www.synqor.com Doc.# 005-2QE612J Rev. B 03/24/09
PageNo.
Page 1
Technical Specification
MECHANICAL DIAGRAM (open frame)
0.14
(3.6) (10.9)
Input: Output: Current: Package:
35-75 V 12 V 25 A (300W) Quarter-brick
(58.4)
2.30
0.43
(50.8)
2.00
0.150
(3.81)
0.300
(7.62)
Top View
(36.8)
1.45
0.300
(15.24)
0.600
(7.62)
(11.43)
0.450
(15.24)
0.600
0.436 max
Side View
Bottom side Clearance
See Note 9
(11.06)
0.025 +0.024
(0.64 +0.61) Lowest Component Load Board
Flanged Pin See Note 10
(4.57) See Note 3
0.180
NOTES
1) Pins 1-3, 5-7 are 0.040" (1.02mm) diameter with 0.080" (2.03 mm) diameter standoff shoulders. 2) Pins 4 and 8 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 (RoHS 5/6) - Tin/Lead over Nickel plate Finish (RoHS 6/6) - Matte Tin 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" (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. 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.
PIN DESIGNATIONS
Pin No.
1 2 3 4 5 6 7 8
Notes: 1. SENSE(-) should be connected to Vout(-) either remotely or at the converter. 2. Leave TRIM pin open for nominal output voltage. 3. SENSE(+) should be connected to Vout(+) either remotely or at the converter.
Doc.# 005-2QE612J Rev. B 03/24/09 Page 2
Name
Vin(+) ON/OFF Vin(-) Vout(-) SENSE(-) TRIM SENSE(+) Vout(+)
Function
Positive input voltage TTL input to turn converter on and off, referenced to Vin(-), with internal pull up. Negative input voltage Negative output voltage Negative remote sense1 Output voltage trim2 Positive remote sense3 Positive output voltage
Product # PQ60120QEA25
Phone 1-888-567-9596
www.synqor.com
Technical Specification
MECHANICAL DIAGRAM (base-plated)
0.14
(3.6) (50.8) (58.4)
Input: Output: Current: Package:
2.30
35-75 V 12 V 25 A (300W) Quarter-brick
(15.24)
0.600
2.00
(11.43)
0.450
0.300
(7.62)
0.150
(3.81)
(10.9)
0.43
1
Top View
(15.24)
2 3
0.600
8 7 6 5 4
0.300
(7.62) (47.2)
1.86
M3 Threaded Inserts 4 Places
See Notes 11 & 12
0.22
(5.6)
0.21
(5.3)
(26.2) (36.8)
1.03
1.45
Side View
0.499 max
(12.67)
Bottom side Clearance
See Note 9
Lowest Component
Load Board
Flanged Pin See Note 10
0.025 +.024
(4.57) See Note 3
0.180
NOTES
(10.46 +0.60)
1) Pins 1-3, 5-7 are 0.040" (1.02mm) diameter with 0.080" (2.03 mm) diameter standoff shoulders. 2) Pins 4 and 8 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 (RoHS 5/6) - Tin/Lead over Nickel plate Finish (RoHS 6/6) - Matte Tin 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: 2.4 oz. (69 g) typical 8) Workmanship: Meets or exceeds IPC-A-610C Class II 9) UL/TUV standards require a clearance greater than 0.04" (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. 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. 11) M3 screws used to bolt unit's baseplate to other surfaces such as a heatsink must not exceed 0.100" (2.54mm) depth below the baseplate surface. 12) Applied torque per screw should not exceed 6 in-lb (0.7 Nm).
Product # PQ60120QEA25 Phone 1-888-567-9596
PIN DESIGNATIONS
Pin No.
1 2 3 4 5 6 7 8
Notes: 1. SENSE(-) should be connected to Vout(-) either remotely or at the converter. 2. Leave TRIM pin open for nominal output voltage. 3. SENSE(+) should be connected to Vout(+) either remotely or at the converter.
Doc.# 005-2QE612J Rev. B 03/24/09 Page 3
Name
Vin(+) ON/OFF Vin(-) Vout(-) SENSE(-) TRIM SENSE(+) Vout(+)
Function
Positive input voltage TTL input to turn converter on and off, referenced to Vin(-), with internal pull up. Negative input voltage Negative output voltage Negative remote sense1 Output voltage trim2 Positive remote sense3 Positive output voltage
www.synqor.com
Technical Specification
PQ60120QEA25 Electrical Characteristics
Input: Output: Current: Package:
35-75 V 12 V 25 A (300W) 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.
Parameter
ABSOLUTE MAXIMUM RATINGS Input Voltage Non-Operating Operating Operating Transient Protection Isolation Voltage (input to output) Operating Temperature Storage Temperature Voltage at ON/OFF input pin INPUT CHARACTERISTICS Operating Input Voltage Range Input Under-Voltage Lockout Turn-On Voltage Threshold Turn-Off Voltage Threshold Lockout Voltage Hysteresis Maximum Input Current No-Load Input Current Disabled Input Current 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 OUTPUT CHARACTERISTICS Output Voltage Set Point Output Voltage Regulation Over Line1 Over Load1 Over Temperature Total Output Voltage Range Output Voltage Ripple and Noise2 Peak-to-Peak RMS Operating Output Current Range Output DC Current-Limit Inception Output DC Current-Limit Shutdown Voltage3 Back-Drive Current Limit while Enabled Back-Drive Current Limit while Disabled Maximum Output Capacitance DYNAMIC CHARACTERISTICS Output Voltage during Load Current Transient For a Step Change in Output C urrent (0.1A/s) For a Step Change in Output Current (5A/s) Settling Time Turn-On Transient Turn-On Time Output Voltage Overshoot EFFICIENCY 100% Load 50% Load TEMPERATURE LIMITS FOR POWER DERATING CURVES Semiconductor Junction Temperature Board Temperature Transformer Temperature ISOLATION CHARACTERISTICS Isolation Voltage (dielectric strength) Isolation Resistance Isolation Capacitance4
Min.
Typ.
Max.
100 80 100 2250 100 125 18
Units
V V V V C C V V V V V A mA mA V mA mA A H\F F V %\mV %\mV mV V mV mV A A V A mA mF mV mV ms
Notes & Conditions
Continuous Continuous 100ms transient, square wave Basic insulation, Pollution Degree 2
-40 -55 -2 35 31.5 28.0 2.5 48 33.0 29.5 3.5 70 20 1.0 5 60 1.5/6 100 11.70 12.00 +1.0\120 +1.0\120 +90 11.58 50 10 0 27 13 0 32 5.0 18 0.5
75 34.5 31.0 4.5 10 100 40 10 15
100V transient for 100ms
100% Load, 35 Vin, trimmed up 5% 0.25V/s input transient RMS thru 4.7H inductor RMS Fast blow external fuse recommended Internal values; see Figure F (Lin\C2) Typical ESR 0.1-0.2W
12.30
+240 12.42 100 40 25 37 23 1 12
Over sample, line, load, temperature & life 500MHz bandwidth Full Load Full Load Subject to thermal derating Output Voltage 10% Low Negative current drawn from output source Negative current drawn from output source 12Vout at 25A Resistive Load 50% to 75% to 50% Iout max 50% to 75% to 50% Iout max, 470 F load cap To within 1% Vout nom Full load, ON/OFF to Vout=90% nom. 12 mF load capacitance, Iout = 0A Figures 1 & 2 Figures 1 & 2 Package rated to 150C UL rated max operating temp 130C See Figures 3 - 6 for derating curves
350 350 1 24 95.5 27 2 96.0 96.5 125 125 125 2250 30 1000 30
ms % % % C C C V MW pF
Note Note Note Note
1: 2: 3: 4:
Line and load regulation is limited by duty cycle quantization and does not indicate a shift in the internal voltage reference. For applications requiring reduced output voltage ripple and noise, consult SynQor applications support (e-mail: support@synqor.com). If the output voltage falls below the Output DC Current Limit Shutdown Voltage for more than 50ms, then the unit will enter into hiccup mode, with a 500ms off-time. Higher values of isolation capacitance can be added external to the module.
Product # PQ60120QEA25
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-2QE612J Rev. B
03/24/09
Page 4
Technical Specification
Electrical Characteristics (Continued)
Parameter P
FEATURE CHARACTERISTICS Switching Frequency Regulation Stage Switching Frequency Isolation Stage 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) ON/OFF Control Hysteresis Pull-Up Voltage Pull Up Resistance Output Voltage Trim Range Output Over-Voltage Protection Over-Temperature Shutdown Over-Temperature Shutdown Restart Hysteresis RELIABILITY CHARACTERISTICS Calculated MTBF (Telcordia) Calculated MTBF (MIL-217) Field Demonstrated MTBF
Input: Output: Current: Package:
35-75 V 12 V 25 A (300W) Quarter-brick
Min.
235.6 117.8 -2 4.0 4.0 -2 4.75 -50 113
Typ.
238.0 119.0
Max.
240.4 120.2 1.0 18 18 1.0
Units
kHz kHz V V V V V V kW % % C C 106 Hrs. 106 Hrs. 106 Hrs.
Notes & Conditions
Over sample, temp & life Over sample, temp & life
1.5 5 10 118 120 10 2.8 1.0
Figures A & B
5.25 +5 123
Measured across Pins 8 & 4; see trim section Over full temp range; % of nominal Vout Average PCB Temperature TR-NWT-000332; 80% load,300LFM, 40oC Ta MIL-HDBK-217F; 80% load, 300LFM, 40oC Ta See website for details
STANDARDS COMPLIANCE
Parameter
STANDARDS COMPLIANCE UL60950-1:2003 CAN/CSA-C22.2No.60950-1:2003 EN60950-1:2001 NeedleFlameTest(IEC695-2-2) IEC61000-4-2
Notes & Conditions
Basicinsulation
Testonentireassembly;board&plasticcomponentsUL94V-0compliant ESDtest,8kV-NP,15kVair-NP(NormalPerformance)
Note:Anexternalinputfusemustalwaysbeusedtomeetthesesafetyrequirements.ContactSynQorforofficialsafetycertificatesonnewreleases ordownloadfromtheSynQorwebsite.
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 axes
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 -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 # PQ60120QEA25
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-2QE612J Rev. B
03/24/09
Page 5
Technical Specification
100
Input: Output: Current: Package:
35-75 V 12 V 25 A (300W) Quarter-brick
95
Efficiency (%)
90
85
35Vin 48Vin 75Vin
80 0 2.5 5 7.5 10 12.5 15 17.5 20 22.5 25
Load Current (A)
Figure 1: Efficiency at nominal output voltage vs. load current for minimum, nominal, and maximum input voltage at 25C.
Figure 2: Power dissipation at nominal output voltage vs. load current for minimum, nominal, and maximum input voltage at 25C.
Figure 3: Maximum output power derating curves vs. ambient air temperature for airflow rates of 100 LFM through 400 LFM with air flowing across the converter from pin 1 to pin 3 (nominal input voltage).
Figure 4: Thermal plot of converter at 24A load current (288W) with 55C air flowing at the rate of 200 LFM. Air is flowing across the converter sideways from pin 1 to pin 3 (nominal input voltage).
Figure 5: Maximum output power derating curves vs. ambient air temperature for airflow rates of 100 LFM through 400 LFM with air flowing lengthwise from input to output (nominal input voltage).
Product # PQ60120QEA25 Phone 1-888-567-9596
Figure 6: Thermal plot of converter at 23A load current (276W) with 55C air flowing at the rate of 200 LFM. Air is flowing across the converter from input to output (nominal input voltage).
Doc.# 005-2QE612J Rev. B 03/24/09 Page 6
www.synqor.com
Technical Specification
Input: Output: Current: Package:
35-75 V 12 V 25 A (300W) Quarter-brick
Figure 7: Turn-on transient at full load (resistive load) (10 ms/div). Ch 1: Vout (5V/div) Ch 2: ON/OFF input (5V/div)
Figure 8: Turn-on transient at zero load (10 ms/div). Ch 1: Vout (5V/div) Ch 2: ON/OFF input (5V/div)
Figure 9: Output voltage response to step-change in load current (50%-75%50% of Iout(max); dI/dt = 0.1A/s). Load cap: 1uF ceramic and 10uF tantalum capacitors. Top trace: Vout (500mV/div), Bottom trace: Iout (10A/div).
Figure 10: Output voltage response to step-change in load current (50%75%-50% of Iout(max): dI/dt = 5A/s). Load cap: 470F, 15 mW ESR tantalum capacitor. Top trace: Vout (500mV/div), Bottom trace: Iout (10A/
Figure 13 4.7 H
source impedance
Figure 12 Figure 14
iS
VSOURCE
iC
DC/DC Converter 1 F
VOUT
10 F,
100 F, 0.2W ESR
electrolytic capacitor
ceramic 100mW ESR capacitor tantalum capacitor
Figure 11: Test set-up diagram showing measurement points for Input Terminal Ripple Current (Figure 12), Input Reflected Ripple Current (Figure 13) and Output Voltage Ripple (Figure 14).
Product # PQ60120QEA25 Phone 1-888-567-9596
Figure 12: Input Terminal Ripple Current, ic, at full rated output current and nominal input voltage with 4.7H source impedance and 100F electrolytic capacitor (100 mA/div). See Figure 11.
Doc.# 005-2QE612J Rev. B 03/24/09 Page 7
www.synqor.com
Technical Specification
Input: Output: Current: Package:
35-75 V 12 V 25 A (300W) Quarter-brick
Figure 13: Input reflected ripple current, is, through a 4.7H source inductor, using a 100F input capacitor, at nominal input voltage and rated load current (10 mA/div). See Figure 11.
Figure 14: Output voltage ripple at nominal input voltage and rated load current (20 mV/div). Load capacitance: 1F ceramic capacitor and 10F tantalum capacitor. Bandwidth: 500 MHz. See Figure 11.
Figure 15: Output voltage response to step-change in input voltage (50V to 100V in 200s). Load cap: 470F, 15 mW ESR tantalum capacitor. Ch 1: Vout (500mV/div), Ch 2: Vin (20V/div), at zero load current.
Figure 16: Load current (10A/div) as a function of time when the converter attempts to turn on into a 10 mW short circuit. Bottom trace (10ms/div) is an expansion of the on-time portion of the top trace (100ms/div).
OVP Shutdown
Figure 17: Output voltage vs. load current showing typical current limit curves and OVP shutdown point.
Product # PQ60120QEA25 Phone 1-888-567-9596 www.synqor.com Doc.# 005-2QE612J Rev. B 03/24/09 Page 8
Technical Specification
BASIC OPERATION AND FEATURES
The PowerQor Exa series converter uses a two-stage power conversion topology. The first stage 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 significantly less energy than Schottky diodes, enabling the PowerQor converter to achieve high efficiency. 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. As an open frame module, the PowerQor converter can 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 pinout configuration.
Input: Output: Current: Package:
CONTROL FEATURES
35-75 V 12 V 25 A (300W) 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(-). The converter is available with either positive or negative logic used for the ON/OFF input. In the positive logic version, the ON/OFF input is active high (meaning that a high voltage turns the converter on). In the negative logic version, the ON/OFF signal is active low (meaning that a low voltage turns the converter on). Figure A details five possible circuits for driving the ON/OFF pin. 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. 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 sense leads (pins 7 and 5) to determine when it should trigger, not the voltage across the converter's output pins (pins 8 and 4). 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. SynQor uses industry standard trim equations. To decrease the output voltage, the user should connect a resistor between Pin 6 (TRIM) and Pin 5 (SENSE(-) input). For a desired decrease of the nominal output voltage, the value of the resistor should be:
ON/OFF
ON/OFF
ON/OFF
Vin(_)
Remote Enable Circuit
Vin(_)
Negative Logic (Permanently Enabled)
Vin(_)
Positive Logic (Permanently Enabled)
Rtrim-down =
where
(511) _ 10.22 D%
kW
ON/OFF
CMOS
5V ON/OFF
D%=
Vnominal - Vdesired Vnominal
x 100%
Vin(_)
Open Collector Enable Circuit
Vin(_)
Direct Logic Drive
Figure A: Various circuits for driving the ON/OFF pin.
Product # PQ60120QEA25
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-2QE612J Rev. B
03/24/09
Page 9
Technical Specification
To increase the output voltage, the user should connect a resistor between Pin 6 (TRIM) and Pin 7 (SENSE(+) input). For a desired increase of the nominal output voltage, the value of the resistor should be
Input: Output: Current: Package:
35-75 V 12 V 25 A (300W) Quarter-brick
lifetime. The OVP trip point is set above this level, so it will not shut down from output overvoltage protection when trimmed up between 5% and 10%. Continuous operation of this converter while trimmed up more than 5% could affect long term reliability. 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-up =
where
(
5.11VOUT(100+D%) _ 511 _ 10.22
1.225D%
D%
)
(kW)
VOUT = Nominal Output Voltage Figure B graphs the relationship between the trim resistor value, Rtrim-up and Rtrim-down, showing the total range the output voltage can be trimmed up or down.
PROTECTION FEATURES
Input Under-Voltage Lockout: The converter is designed to turn off when the input voltage is too low, helping to avoid an input system instability problem, which is described in more detail in the application note titled "Input System Instability" on the SynQor website. 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* 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: If the output current exceeds the "Output DC Current Limit Inception" point*, then a fast linear current limit controller will reduce the output voltage to maintain a constant output current. If as a result, the output voltage falls below the "Output DC Current Limit Shutdown Voltage"* for more than 50ms, then the unit will enter into hiccup mode, with a 500ms off-time. The unit will then automatically attempt to restart. Back-Drive Current Limit: If there is negative output current of a magnitude larger than the "Back-Drive Current Limit while Enabled" specification*, then a fast back-drive limit controller will increase the output voltage to maintain a constant output current. If this results in the output voltage exceeding the "Output OverVoltage Protection" threshold*, then the unit will shut down. The full I-V output characteristics can be seen in Figure 17. Output Over-Voltage Limit: If the voltage directly across the output pins exceeds the "Output Over-Voltage Protection" threshold*, the converter will immediately stop switching. This shutdown is latching; unlike other shutdown types, the converter will not restart unless the input power is cycled or the ON/OFF input is toggled. 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*.
Figure B: Trim Graph for 12Vout 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 filtered to eliminate noise. Limited 10% up-trim: This converter is capable of operating for an indefinite period of time with the output trimmed up to 5% above the nominal 12V output level*. It may also be trimmed down by as much as 50% (to 6.0V) indefinitely. This converter is also capable of being trimmed up by as much as 10% (up to 13.2V) for shorter periods of time that are not a significant fraction of the product lifetime. For example, in a test situation, or for output voltage margining where it would remain trimmed up between 5% and 10% of the nominal voltage for a few hundred hours, but not for an indefinite period or the product
Product # PQ60120QEA25 Phone 1-888-567-9596
* See Electrical Characteristics page.
www.synqor.com Doc.# 005-2QE612J Rev. B 03/24/09 Page 10
Technical Specification
APPLICATION CONSIDERATIONS
Limited Output Voltage Resolution: The internal voltage control feedback loop has limited resolution. Therefore, the output voltage will exhibit discrete steps as the loop responds to changes in line, load, trim, or remote sense. For instance, on close examination, the startup ramp has a "stair-step" shape. Likewise, a load transient response will be composed of multiple discrete steps. The size of each step is well determined, and is shown in Figure C. A close-up picture of a single step is shown in Figure D. Stepping will not occur under steady state conditions.
Input: Output: Current: Package:
35-75 V 12 V 25 A (300W) Quarter-brick
Current share and active trim not recommended: It is important to note that external feedback control using the sense or trim pins will cause sustained stepping. External current share or active trim circuits contain a separate reference voltage. After this external feedback has taken control, the actual output voltage can still differ from the external reference voltage by as much as the step size. If the external feedback loop integrates this error voltage, it will cause a limit cycle oscillation. For this reason, external feedback using the sense and trim pins is not recommended. 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 website which provides an understanding of why this instability arises, and shows the preferred solution for correcting it.
Figure C: Output voltage resolution.
Figure D: Smallest possible Vout step at 48Vin and 12Vout.
* See Electrical Characteristics page.
Product # PQ60120QEA25 Phone 1-888-567-9596 www.synqor.com Doc.# 005-2QE612J Rev. B 03/24/09 Page 11
Technical Specification
Application Circuits: Figure E below provides a typical circuit diagram which details the input filtering and voltage trimming. Input Filtering and External Input Capacitance: Figure F below shows 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 Characteristics section on the Electrical Specifications page. More detailed information is available in the application note titled "EMI Characteristics" on the SynQor website.
Input: Output: Current: Package:
35-75 V 12 V 25 A (300W) Quarter-brick
Output Filtering and External Output Capacitance: Figure F below shows the internal output filter components. This filter dramatically reduces output voltage ripple. However, some minimum external output capacitance is required, as specified in the Output Characteristics section on the Electrical Specifications page. No damage will occur without this capacitor connected, but peak output voltage ripple will be much higher.
Vin
External Input Filter
100F ESR @0.2W
Electrolytic Capacitor
Vin(+)
Vout(+) Vsense(+) Rtrim-up
or
ON/OFF
Trim
Vsense(_) Vin(_) Vout(_)
Rtrim-down
Cload
Iload
Figure E: Typical application circuit (negative logic unit, permanently enabled).
Lin
Vin(+) C1 Vin(_) C2
Regulation Stage Isolation Stage
Vout(+)
Current Sense
Vout(_)
Figure F: Internal Input and Output Filter Diagram (component values listed on specifications page).
Product # PQ60120QEA25
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-2QE612J Rev. B
03/24/09
Page 12
Technical Specification
PART NUMBERING SYSTEM
The part numbering system for SynQor's dc-dc converters followstheformatshownintheexamplebelow.
P Q 60 1 20 Q E A 2 5 N N S - G 6/6 RoHS Options Output Current Thermal Design Performance Level Package Size Output Voltage Input Voltage Product Family
Thermal Design
A - Open Frame B - Baseplated
Input: Output: Current: Package:
ORDERING INFORMATION
35-75 V 12 V 25 A (300W) Quarter-brick
Thetablesbelowshowthevalidmodelnumbersandordering optionsforconvertersinthisproductfamily.Whenordering SynQorconverters,pleaseensurethatyouusethecomplete 15 character part number consisting of the 12 character basepartnumberandtheadditionalcharactersforoptions. Add"-G"tothemodelnumberfor6/6RoHScompliance.
Model Number PQ60120QEw25xyz-G Input Voltage 25 - 35V Output Voltage 12V Max Output Current 25A
(see Ordering Information)
The following options must be included in place of the w x y z spaces in the model numbers listed above.
Options Description: w 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
The first 12 characters comprise the base part number and the last 3 characters indicate available options. The "-G" suffixindicates6/6RoHScompliance.
Many operational functions of this converter are programmable. Contact the factory regarding customization. Notallcombinations
makevalidpartnumbers,pleasecontactSynQorforavailability. SeetheProductSummarywebpageformoreoptions.
Application Notes
Avarietyofapplicationnotesandtechnicalwhitepaperscan bedownloadedinpdfformatfromourwebsite.
RoHS Compliance:TheEUledRoHS(RestrictionofHazardous Substances)DirectivebanstheuseofLead,Cadmium,Hexavalent Chromium, Mercury, Polybrominated Biphenyls (PBB), and PolybrominatedDiphenylEther(PBDE)inElectricalandElectronic 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 pageore-mailusatrohs@synqor.com.
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 SynQoroffersathree(3)yearlimitedwarranty.CompletewarrantyinformationislistedonourwebsiteorisavailableuponrequestfromSynQor. InformationfurnishedbySynQorisbelievedtobeaccurateandreliable. However,noresponsibilityisassumedbySynQorforitsuse,norforany infringementsofpatentsorotherrightsofthirdpartieswhichmayresult fromitsuse.Nolicenseisgrantedbyimplicationorotherwiseunderany patentorpatentrightsofSynQor.
Product # PQ60120QEA25
www.synqor.com
Doc.# 005-2QE612J Rev. B
03/24/09
Page 13

▲Up To Search▲

Price & Availability of PQ60120QEA25PKS-G

	To Download PQ60120QEA25PKS-G Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .