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Technical S pecification
PQ60033ETL30
48V in
Input
3.3Vout
Output
30Amp
Current
2250Vdc
Isolation
Eighth-brick
DC/DC Conver ter
Th e PQ 6003 3ETL3 0 Po we r Qor (R) Te r a e i g ht h-b ri ck con ve rt e r is a next-generation, board-mountable, isolated, fixed s witch ing freq u enc y DC/DC c on ver ter tha t u ses s y nch r o n ou s r ectification to ach ieve extr emel y h igh con vers io n e ffi c ienc y. Th e p owe r d is sip a ted by th e co nver ter is s o lo w tha t a he at s ink is no t r eq ui red , wh ich sa v es c os t, we ight , h eigh t , a n d a p pl ica tion effor t. Al l of th e p ower an d con tro l co m p on en ts a r e mo un ted to th e mu l ti-l ay er P CB s ub s tra te with h igh -y iel d su r fac e mo un t tec hn ol ogy . Si nce the P ower Q or c on ve rt er h a s no exp l icit th er ma l int er fa ces , it is ex tr emel y reliable. RoHS Compliant (see page 12 ). Operational Features
* High efficiency, 90% at full load * Delivers up to 30 amps of output current with minimal derating - no heatsink required * Wide input voltage range: 35V - 75V, with 100V 100ms input voltage transient capability * Fixed frequency switching provides predictable EMI performance * No minimum load requirement means no preload resistors required
PQ60033ETL30 Module
Pr otection Features
* Input under-voltage lockout disables converter at low input voltage conditions * Output current limit and short circuit protection protects converter and load from permanent damage and consequent hazardous conditions * Active back bias limit prevents damage to converter from external load induced pre-bias * Output over-voltage protection protects load from damaging voltages * Thermal shutdown protects converter from abnormal environmental conditions
Mechanical Features
* Industry standard eighth-brick pin-out configuration * Industry standard size: 0.90" x 2.3" (22.9x58.4mm) * Total height only 0.320" (8.13mm), permits better airflow and smaller card pitch * Total weight: 0.85 oz. (24 grams) * Flanged pins designed to permit surface mount soldering (avoid wave solder) using FPiP technique
Safety Features
* 2250V, 30 M input-to-output isolation provides input/output ground separation * UL 60950-1 recognized (US & Canada), basic insulation rating * TUV certified to EN60950-1 * Meets 72/23/EEC and 93/68/EEC directives which facilitates CE Marking in user's end product * Board and plastic components meet UL94V-0 flammability requirements
Contr ol Features
* On/Off control referenced to input side (positive and negative logic options are available) * Remote sense for the output voltage compensates for output distribution drops * Output voltage trim permits custom voltages and voltage margining
Product # PQ60033ETL30 Phone 1-888-567-9596 www.synqor.com
Doc.# 005-2ET633F Rev. A
06/01/06
Page 1
Technical Specification
MECHANICAL DIAGRAM
2.00
(50.8)
Input: Output: Current: Package:
35-75 V 3.3 V 30 A Eighth-brick
2.30
(58.4)
0.450
(11.43)
0.14
(3.6)
0.300
(7.62)
0.15
(3.8)
Top View
1 2 3 8 7 6 5 4
0.150
(3.81)
0.600
(15.24)
0.300
(7.62)
0.900 +0.022
(22.86 +0.55)
0.320 +0.015
(8.13 +0.38)
0.600
(15.24)
Overall Height
0.145
(3.68) See Note 3
0.016 +0.015
(0.41 +0.38)
Side View
Lowest Component Load Board Flanged Pin See Note 10
Bottom Side Clearance
NOTES
1) Pins 1-3, 5-7 are 0.040" (1.02mm) diameter. with 0.080" (2.03mm) 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 - 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: 0.85 oz (24 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 core shown at left above is considered part of the input/primary circuit and that the two ferrite cores shown at the right above are considered part of the output/secondary 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 # PQ60033ETL30 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.
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
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Doc.# 005-2ET633F Rev. A
06/01/06
Page 2
Technical Specification
PQ60033ETL30 ELECTRICAL CHARACTERISTICS
Parameter
ABSOLUTE MAXIMUM RATINGS
Input: Output: Current: Package:
35-75 V 3.3 V 30 A Eighth-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 75 100 2250 100 125 18 48 32.6 30.6 2.0 6 150 1.5 50 47 3.276 3.300 +0.1 \ 3.3 +0.2 \ 7.0 +5 3.300 6 6 36 1.5 8 10 75 33.7 31.6 2.1 3.2 75 10 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 mF mF dB mV mV s
Notes & Conditions
Continuous Continuous 100ms transient, square wave Basic insulation, Pollution Degree 2
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 31.5 29.6 1.9 0
INPUT CHARACTERISTICS
100% Load, 35 Vin, nominal Vout
20 1.0 \ 3.3 3.332
1000V/ms input transient RMS thru 10H inductor; Figures 13 & 15 RMS; Figures 13 & 14 Fast blow external fuse recommended Internal values, see Figure E Typical ESR 0.1-0.2, see Figure 13
OUTPUT 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 Electrolytic Maximum Output Capacitance Ceramic 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 Restart Inhibit Time Output Voltage Overshoot 100% Load 50% Load Semiconductor Junction Temperature Board Temperature Transformer Temperature Isolation Voltage (dielectric strength) Isolation Resistance Isolation Capacitance2
3.261
3.349 50 20 30 40 50 10 5
0 30.5
Over sample, line, load, temperature & life 20MHz 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 Negative current drawn from output Negative current drawn from output 3.3Vout at 30A Resistive Load 3.3Vout 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 -40C to +125C; Figure F No 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
DYNAMIC CHARACTERISTICS
75 120 180 80 12 9 190 15 10 200 0 90 92 125 125 125 2250 30 3300 18 11 210
ms ms ms % % % C C C V M pF
EFFICIENCY
TEMPERATURE LIMITS FOR POWER DERATING CURVES
ISOLATION CHARACTERISTICS
Note 1: Output voltage ripple can exceed maximum specification during startup when output voltage is less than 1.4V. Additional output capacitance will mitigate this startup ripple behavior. 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 # PQ60033ETL30
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Doc.# 005-2ET633F Rev. A
06/01/06
Page 3
Technical Specification
Parameter P
FEATURE CHARACTERISTICS
Input: Output: Current: Package:
35-75 V 3.3 V 30 A Eighth-brick
PQ60033ETL30 ELECTRICAL CHARACTERISTICS (Continued)
Min.
317 -2 2.4 2.4 -2 10 120 120 10 3.0 2.6
Typ.
333
Max.
350 0.8 18 18 0.8 5 +10 +10 129
Units
kHz V V V V V k % % % C C
Notes & Conditions
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 Calculated MTBF (Telcordia) Calculated MTBF (MIL-217) Field Demonstrated MTBF
Figures A & B Measured across Pins 8 & 4; Figure C Measured across Pins 8 & 4 Over full temp range; % of nominal Vout Average PCB Temperature
-20 117
RELIABILITY CHARACTERISTICS
106 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 latest values
STANDARDS COMPLIANCE
Parameter P
STANDARDS COMPLIANCE
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
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
QUALIFICATION TESTING
# Units
32 5 5 10 5 5 5 15 pins
Test Conditions
10-55Hz sweep, 0.060" total excursion,1 min./sweep, 120 sweeps for 3 axis
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.
OPTIONS
SynQor provides various options for Enable Logic and Pin Length for this family of DC/DC converters. Please consult the last page for information on available options.
PATENTS
SynQor is protected under various patents, including but not limited to U.S. Patent numbers 5,999,417; 6,222,742 B1; 6,594,159 B2; 6,545,890 B2.
Product # PQ60033ETL30
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-2ET633F Rev. A
06/01/06
Page 4
Technical Specification
95
Input: Output: Current: Package:
93
35-75 V 3.3 V 30 A Eighth-brick
90
92
Efficiency (%)
Efficiency (%)
85
91
80
90
75 35 Vin 48 Vin 75 Vin
89 25 C 40 C 55 C
70
88
65 0 5 10 15 20 25 30
87 100 200 300 400
Load Current (A)
Airflow (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).
7
12
10
Power Dissipation (W)
8
6
Power Dissipation (W)
35 Vin 48 Vin 75 Vin
6
5
4
4
2
25 C 40 C 55 C
0 0 3 6 9 12 15 18 21 24 27 30
3 100 200 300 400
Load Current (A)
Airflow (LFM)
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
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)
5
0 25 40 55 70 85
Ambient Air Temperature (C)
Figure 5: Maximum output power-derating curves vs. ambient air temperature for airflow rates of 100 LFM through 400 LFM with air flowing from pin 3 to pin 1(nominal input voltage).
Product # PQ60033ETL30 Phone 1-888-567-9596
Figure 6: Thermal plot of converter at 28.5 amp load current (94.05W) with 70C air flowing at the rate of 200 LFM. Air is flowing across the converter from 3 to pin 1 (nominal input voltage).
Doc.# 005-2ET633F Rev. A 06/01/06 Page 5
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Technical Specification
30
Input: Output: Current: Package:
35-75 V 3.3 V 30 A Eighth-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)
5
0 25 40 55 70 85
Ambient Air Temperature (C)
Figure 7: 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 input to output (nominal input voltage).
Figure 8: Thermal plot of converter at 27.4 amp load current (90.42W) with 70C 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) (5 ms/div). Load cap: 10uF, 100 m ESR tantalum capacitor and 1uF ceramic capacitor. Input voltage pre-applied. Ch 1: Vout (1V/div), Ch 2: ON/OFF input (5V/div).
Figure 10: Turn-on transient at zero load (10 ms/div). Load cap: 10uF, 100 m ESR tantalum capacitor and 1uF ceramic capacitor. Ch 1: Vout (1V/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 m ESR tantalum cap and 1F ceramic cap. Ch 1: Vout (50mV/div), Ch 2: Iout (10A/div).
Product # PQ60033ETL30 Phone 1-888-567-9596
Figure 12: Output voltage response to step-change in load current (50%75%-50% of Iout(max): dI/dt = 1A/s). Load cap: 470F, 30 m ESR tantalum cap and 1F ceramic cap. Ch 1: Vout (50mV/div), Ch 2: Iout (10A/div).
Doc.# 005-2ET633F Rev. A 06/01/06 Page 6
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Technical Specification
See Fig. 15
source impedance
Input: Output: Current: Package:
35-75 V 3.3 V 30 A Eighth-brick
10 H
See Fig. 14 See Fig. 16
iS
VSOURCE
iC
DC/DC Converter 1 F
VOUT
15 F,
47 F, <1 ESR
electrolytic capacitor
ceramic 100m ESR capacitor 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 (50 mA/div). Bandwidth: 250MHz. See Figure 13.
Figure 15: Input reflected ripple current, is, through a 10 H source inductor, using a 47F electrolytic input capacitor (2mA/div). Bandwidth: 250MHz. See Figure 13.
Figure 16: Output voltage ripple at nominal input voltage and rated load current (10 mV/div). Load capacitance: 1F ceramic capacitor and 15F tantalum capacitor. Bandwidth: 20 MHz. See Figure 13.
Figure 17: Output voltage response to step-change in input voltage (50V to 100V in 100S), at 15A load current. Load cap: 15F 100m ESR tantalum capacitor and 1uF ceramic cap. Ch 1: Vout (50mV/div), Ch 2: Vin (20V/div).
Product # PQ60033ETL30 Phone 1-888-567-9596
Figure 18: Load current (20A/div) as a function of time when the converter attempts to turn on into a 15m short circuit. Top trace (1ms/div) is an expansion of the on-time portion of the bottom trace (40ms/div).
Doc.# 005-2ET633F Rev. A 06/01/06 Page 7
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Technical Specification
1
0 -10
Input: Output: Current: Package:
35-75 V 3.3 V 30 A Eighth-brick
0.1
Forward Transmission (dB)
-20 -30 -40 -50 -60 -70 -80 -90 -100 10 100 1,000 10,000 100,000 35 Vin 48 Vin 75 Vin
Output Impedance ( )
0.01
0.001
35 Vin 48 Vin 75 Vin
0.0001 10 100 1,000 10,000 100,000
Hz
Hz
Figure 19: Magnitude of incremental output impedance (Zout = vout/iout) for minimum, nominal, and maximum input voltage at full rated power.
5
Figure 20: Magnitude of incremental forward transmission (FT = vout/vin) for minimum, nominal, and maximum input voltage at full rated power.
100
-5
Reverse Transmission (dB)
-15
Input Impedance ( )
10
-25
-35 35 Vin -45 48 Vin 75 Vin -55 10 100 1,000 10,000 100,000
1 35 Vin 48 Vin 75 Vin 0.1 10 100 1,000 10,000 100,000
Hz
Hz
Figure 21: Magnitude of incremental reverse transmission (RT = iin/iout) for minimum, nominal, and maximum input voltage at full rated power.
4.0 3.5 3.0
Figure 22: Magnitude of incremental input impedance (Zin = vin/iin) for minimum, nominal, and maximum input voltage at full rated power.
Output Voltage (V)
2.5 2.0 1.5 1.0 0.5 0.0 0 5 10 15 20 25 30 35 40 45 35 V 48 V 75 V
Load Current (A)
Figure 23: Output voltage vs. load current showing typical current limit curves and converter shutdown points.
Product # PQ60033ETL30 Phone 1-888-567-9596 www.synqor.com Doc.# 005-2ET633F Rev. A 06/01/06 Page 8
Technical Specification
BASIC OPERATION AND FEATURES
The single stage power converter switches 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 eighth-brick, quarter-brick and half-brick converters uses the industry standard footprint and pin-out configuration.
Input: Output: Current: Package:
35-75 V 3.3 V 30 A Eighth-brick
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.
CONTROL FEATURES
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.
ON/OFF
ON/OFF
ON/OFF
Vin(_) Remote Enable Circuit
Vin(_) Negative Logic (Permanently Enabled) ON/OFF
TTL/ CMOS
Vin(_) Positive Logic (Permanently Enabled) ON/OFF ON/OFF 10k 50k
5V
5V
TTL
100pF
Vin(_) Open Collector Enable Circuit
Vin(_) Direct Logic Drive
Vin(_)
Figure A: Various circuits for driving the ON/OFF pin.
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Figure B: Internal ON/OFF pin circuitry
Doc.# 005-2ET633F Rev. A 06/01/06 Page 9
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 3.3 V 30 A Eighth-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.
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: Once the output current reaches the current-limit inception point, the converter will decrease the output voltage as the output current increases. However, once the impedance of the short across the output is small enough to make the output voltage drop below the specified Output DC CurrentLimit Shutdown Voltage, the converter turns off (see Figure 23). 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.
Rtrim-down =
where
(511) - 10.22 %
(k)
% =
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+%) _ 511 _
1.225%
%
10.22
)
(k)
VOUT = Nominal Output Voltage Figure C graphs the relationship between the trim resistor value and Rtrim-up and Rtrim-down, showing the total range the output voltage can be trimmed up or down.
10,000
Trim Resistance (kOhms)
1,000
100
10
1 0 2 4 6 8 10 12 14 16 18 20
% increase Vout
% decrease Vout
Figure C: Trim Graph for 3.3Vout 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.
Product # PQ60033ETL30 Phone 1-888-567-9596
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 OverTemperature 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.
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Doc.# 005-2ET633F Rev. A
06/01/06
Page 10
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 website which provides an understanding of why this instability arises, and shows the preferred solution for correcting it. Application Circuits: Figure D below provides a typical circuit diagram which details the input filtering and voltage trimming. Input Filtering and External Capacitance: Figure E below provides a diagram showing the internal input filter components. This filter dramatically reduces input terminal ripple current, which otherwise could exceed the rating of an external input electrolytic capacitor. The recommended external input capacitance is specified in the "Input Characteristics" section. More detailed information is available in the application note titled "EMI Characteristics" on the SynQor website.
Input: Output: Current: Package:
35-75 V 3.3 V 30 A Eighth-brick
Startup/Restart Inhibit Period: The Restart Inhibit Period ensures that the converter will remain off for approximately 200ms once it is shut down. When an output short is present, this generates a 5Hz "hiccup mode," which prevents the converter from overheating. In all, there are five ways that the converter can be shut down that initiate a Restart Inhibit Period: * Input Under-Voltage Lockout * Output Over-Voltage Protection * Over Temperature Shutdown * Current Limit * Turned off by the ON/OFF input Figure F shows four turn-on scenarios, where a Restart Inhibit Period is initiated at t1, t2, and t3: A Startup Inhibit Period is initiated when the input voltage is brought up from zero voltage during initial startup, beginning as the input voltage reaches approximately 10V. At the end of the Startup Inhibit Period (typically 10mS), if the ON/OFF pin has been active for at least 1ms, and the input voltage is above the Under-Voltage Lockout threshold, the output turns on with the Typical Turn-On Time. This is shown at time t0.
Vin(+) External Input Filter
Electrolytic Capacitor
Vout(+) Vsense(+) Rtrim-up
or
Vin
47F
ON/OFF
Trim
Vsense(_) Vin(_) Vout(_)
Rtrim-down
Cload
Iload
Figure D: Typical application circuit (negative logic unit, permanently enabled).
L
Vin(+) C Vin(_)
Figure E: Internal Input Filter Diagram (component values listed on the specifications page).
Product # PQ60033ETL30 Phone 1-888-567-9596 www.synqor.com Doc.# 005-2ET633F Rev. A 06/01/06 Page 11
Technical Specification
At time t1, the input voltage falls below the Input Under-Voltage Lockout threshold. This disables the unit and initiates a Restart Inhibit Period. During the Restart Inhibit Period, if the input voltage again exceeds the UVLO threshold, the unit cannot be enabled again until the Restart Inhibit Period has elapsed. Once this occurs, the output turns on with the Typical Turn-On Time. At time t2, the ON/OFF pin disables the unit and initiates a Restart Inhibit Period. During the Restart Inhibit Period, if the ON/OFF pin is again activated, the unit cannot be enabled again until the Restart Inhibit Period has elapsed. Once this occurs, the output turns on with the Typical Turn-On Time. When the ON/OFF pin goes high after t3, and the Restart Inhibit Period has elapsed, the output turns on approximately 1.6ms after the ON/OFF pin is activated, with the Typical Turn-On Time. If the Under-Voltage Lockout threshold has not been satisfied at the end of either Inhibit Period, the unit will remain disabled until the input voltage exceeds the UVLO threshold. Once this occurs, the output turns on with the Typical Turn-On Time. If the ON/OFF pin is activated after either Inhibit Period has elapsed, the output will turn on approximately 1.6ms after the ON/OFF pin is activated, with the Typical Turn-On Time.
Input: Output: Current: Package:
35-75 V 3.3 V 30 A Eighth-brick
RoHS Compliance: The EU led RoHS (Restriction of Hazardous Substances) Directive bans the use of Lead, Cadmium, Hexavalent Chromium, Mercury, Polybrominated Biphenyls (PBB), and Polybrominated Diphenyl Ether (PBDE) in Electrical and Electronic Equipment. This SynQor product is available as 6/6 RoHS compliant. For more information please refer to SynQor's RoHS addendum available at our RoHS Compliance / Lead Free Initiative web page or e-mail us at rohs@synqor.com.
Vin
Under-Voltage Lockout Turn-On Threshold
ON/OFF
(pos logic) ON
OFF ON
OFF
ON
Vout
10ms
(typical start-up inhibit period) (typical restart inhibit period)
13.5ms
(typical turn on time)
200ms
200ms
200ms
t0
t1
t2
t3
t
Figure F: Startup Inhibit Period (turn-on time not to scale)
Product # PQ60033ETL30
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-2ET633F Rev. A
06/01/06
Page 12
Technical Specification
PART NUMBERING SYSTEM
The part numbering system for SynQor's PowerQor DC/DC converters follows the format shown in the example below.
PQ 60 033 E T L 30 N N S - G 6/6 RoHS Options Output Current Thermal Design Performance Level Package Size Output Voltage Input Voltage Product Family
(see Ordering Information)
Input: Output: Current: Package:
ORDERING INFORMATION
35-75 V 3.3 V 30 A Eighth-brick
The tables below show the valid model numbers and ordering options for converters in this product family. When ordering SynQor converters, please ensure that you use the complete 15 character part number consisting of the 12 character base part number and the additional 3 characters for options. A "-G" suffix indicates the product is 6/6 RoHS compliant.
Model Number PQ60033ETL30xyz-G Input Voltage 35 - 75 V Output Max Output Voltage Current 3.3 V 30 A
The following option choices must be included in place of the x y z spaces in the model numbers listed above.
Options Description: x y z
Pin Feature Length Set K - 0.110" P - Positive N - 0.145" S - Standard N - Negative R - 0.180" Y - 0.250" Enable Logic
The first 12 characters comprise the base part number and the last 3 characters indicate available options. Although there are no default values for enable logic and pin length, the most common options are negative logic and 0.145" pins. These part numbers are more likely to be readily available in stock for evaluation and prototype quantities. A "-G" suffix indicates the product is 6/6 RoHS compliant.
Application Notes
A variety of application notes and technical white papers can be downloaded in pdf format from our website.
Contact SynQor for further information:
Phone: Toll Free: Fax: E-mail: Web: Address:
978-849-0600 888-567-9596 978-849-0602 power@synqor.com www.synqor.com 155 Swanson Road Boxborough, MA 01719 USA
Phone 1-888-567-9596
Warranty SynQor offers a three (3) year limited warranty. Complete warranty information is listed on our website or is available upon request from SynQor.
Information furnished by SynQor is believed to be accurate and reliable. However, no responsibility is assumed by SynQor for its use, nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of SynQor.
Doc.# 005-2ET633F Rev. A 06/01/06 Page 13
Product # PQ60033ETL30
www.synqor.com

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