CBAMTM PQ-28
Features
· The Power Quality Module (PQ-28) is a single
input power conditioning module
· 1/2 brick package (2.28" x 2.4" x 0.50")
· Designed for 200 Watts
· Designed to interface with MIL-STD-1275B,
28VDC Power Bus
· 100VDC input capability
· Automatic recovery for output short circuit
· Aluminum substrate technology
· All applicable materials used are a minimum of
UL94V-0 rated. Designed to meet UL60950
· All ceramic solution
· Excellent MTBF
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· Five year warranty
·
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Available with RoHS compliant construction
part number: PQ-28 (RoHS)
Description
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The Power Quality Module PQ-28 is a single input power
conditioning module. Built in a 1/2 brick size package
that operates over a 11 - 100VDC input, the PQ-28 is
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designed for 200 Watts and features automatic recovery
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for output short circuit.
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P Figure 1. Block Diagram
Figure 2. Input - Output DC Voltage
CompuMess Elektronik GmbH · Lise-Meitner-Str. 1 · D-85716 Unterschleißheim
Telefon (089) 32 15 01 - 0 · Telefax (089) 32 15 01 - 11
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2401 Stanwell Drive, Concord Ca. 94520 Ph: 925-687-4411 Fax: 925-687-3333 www.calex.com Email: sales@calex.com
1 1/9/09
CBAMTM PQ-28
Input Parameters (Note 1)
Model PQ-28 Units
Input Voltage Range MIN 11 VDC
TYP 28
MAX 100
Input Current, No Load TYP 90 mA
Input Current, 28VDC, 200W Load TYP 7.4 A
Efciency 28VDC. 200W Load TYP 95 %
Under Voltage Lock Out
Turn-on TYP 10 VDC
Turn-off TYP 9.5 VDC
Turn-on time
Delay before rise TYP 180 - 420 ms
Rise time TYP 25 ms
Overshoot TYP 3 %
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Switching Frequency TYP 200 kHz
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Input Fuse (2)
Input Reverse Polarity Protection (2)
Performance Features (Note 1)
Model PQ-28 Units
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MAX See
Output Power Derating W
MIN 0
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Input to Output Voltage Drop, 11VDC, 100W TYP 2.8 VDC
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Load Regulation (45-100VDC) TYP 0.1
%
MAX 1
Temperature Coefcient (45 -100VDC) TYP 150 ppm/ºC
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Short Circuit Protection Auto
+Output to -Output Restart
Notes:
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(1) All parameters measured at TAMB=25ºC, Vin=28VDC, Full Power
Out, 100µF Bus Capacitor unless otherwise noted. Refer to the
Calex Application Notes for the denition of terms, measurement
circuits, and other information.
(2) Refer to Calex Application notes for information on fusing. Fuse
is only required for system protection, and input reverse polarity
(9) Calex CBAMTM modules are designed to withstand most
solder/wash processes. Careful attention should be used
when assessing the applicability in your specic manufacturing
process. The CBAMTM modules are not hermetically sealed.
(10) Available with RoHS and Non-RoHS construction, contact factory
for details.
protection. RoHS Compliance means conformity to EU Directive 2002/95/
(3) Load regulation is dened as the output voltage change when EC of 27 January 2003, on the restriction of the use of certain
changing load power from maximum to minimum. hazardous substances in electrical and electronic equipment,
(4) Isolation is measured by applying a DC voltage between the lead, cadmium, mercury, hexavalent chromium, polybrominated
baseplate and pins. biphenyls, and polybrominated diphenyl ethers are not present
(5) Thermal shutdown occurs at about +112ºC on the baseplate. The in quantities exceeding the following maximum concentrations in
unit will autostart at about +110ºC. any homogeneous material, except for applicable exemptions.
(6) The thermal impedance is dened as the temperature rise above 0.1% (by weight of homogeneous material) lead, mercury,
ambient per package watt dissipated. Baseplate not connected to hexavalent chromium, polybrominated biphenyls, polybrominated
an external heatsink. diphenyl ethers, or 0.01% (by weight of homogeneous material)
(7) MTBF is calculated based on MIL-HDBK-217F under the following cadmium.
conditions: The RoHS marking is as follows.
Reliability prediction method = Part Stress Analysis
Baseplate temperature = 40ºC
Environment = Ground, Benign
(8) Torque fasteners into threaded mounting inserts at 12 in.oz. or
less. Greater torque may result in damage to the unit and void the warranty.
CompuMess Elektronik GmbH · Lise-Meitner-Str. 1 · D-85716 Unterschleißheim
Telefon (089) 32 15 01 - 0 · Telefax (089) 32 15 01 - 11
info@compumess.de · www.compumess.de · www.netzteile.de
2401 Stanwell Drive, Concord Ca. 94520 Ph: 925-687-4411 Fax: 925-687-3333 www.calex.com Email: sales@calex.com
2 1/9/09
CBAMTM PQ-28
General Specications
Model PQ-28 Units
Isolation
Baseplate to pins (4) MIN 700 VDC
Environmental
Baseplate Operating Temperature Range (5) MIN -40
ºC
MAX +100
Storage Temperature Range MIN -40
ºC
MAX +120
Thermal Impedance (6) TYP 7 ºC/Watt
MTBF MIL-HDBK-217F (7) MIN 170,750 h
General
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Unit Weight TYP 100 g
Case Dimension 2.28" x 2.4" x 0.50"
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Torque on Mounting Inserts (8) MAX 12 in. oz.
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BOTTOM VIEW SIDE VIEW
Mechanical tolerances unless otherwise noted:
Pin Function Pin Dia. X.XX dimensions ±0.020 inches
1 -INPUT (COMMON) 0.080" X.XXX dimensions ±0.005 inches
3 BASEPLATE 0.040"
4 +INPUT 0.080"
5 -OUTPUT (COMMON) 0.080"
9 +OUTPUT 0.080"
CompuMess Elektronik GmbH · Lise-Meitner-Str. 1 · D-85716 Unterschleißheim
Telefon (089) 32 15 01 - 0 · Telefax (089) 32 15 01 - 11
info@compumess.de · www.compumess.de · www.netzteile.de
2401 Stanwell Drive, Concord Ca. 94520 Ph: 925-687-4411 Fax: 925-687-3333 www.calex.com Email: sales@calex.com
3 1/9/09
CBAMTM PQ-28
PQ-28 Application Section
Circuit Description Derating
The PQ-28 consists of an Input lter to interface with MIL- The output power derating graph is shown in Fig. 4.
STD-1275B. See Fig. 1. The next section of the circuit is The full 200W ouput is available over the range of 20
a DC/DC converter with an integral output lter. For input to 75V input. The output in the dashed area is limited to
voltages of 11V up to about 40V, the DC/DC follows the a 10 second ON time at a 1% duty cycle. At the lower
input voltage in a semi-regulated mode, where the output input voltages the power loss is due to copper loss,
voltage will reduce as the output power is increased. At while at the higher input voltages the power loss is due
about 40V input and higher the output will be regulated to the switching losses. At 11V input the output is semi-
to 36V nominal. regulated and reduces as the load is increased, see g.
5 & 6. To have 200W output at 11V input requires a load
of about 25A, and the output voltage will be drifting lower
during the test as the internal components heat up.
Sufcient heatsinking is required to keep the baseplate
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below the 100ºC specication.
Figure 3. TYPICAL APPLICATION
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A typical application, Figure 3. shows a PQ-28 driving a
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HEW DC/DC converter. A Bus Capacitor is required at
the output of the PQ-28. Suggested types or equivalent
as shown in the table.
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Nippon Chemi-Con 100µF, 100V, ESR=0.15,
Aluminum Radial Thru Hole,
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EXLV101__101MK20S
NIC Components 100µF 100V, ESR=0.17,
Aluminum Surface Mount
Figure 4. Derating Curve
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NACK101M100V16x17TR13F
Input Reverse Polarity Protection
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Input Reverse Polarity Protection is achieved by the
internal TVS diode which is part of the Input Filter (see
Fig. 1, Block Diagram). If the Input is connected in the
reverse polarity then the TVS diode provides a low
impedance path to blow the external input fuse.
The fuse rating should be about 130% of the nominal
running current. If the application has too wide an input
current range, then the designer should consider using
an external series diode to provide the Input Reverse
Polarity Protection.
CompuMess Elektronik GmbH · Lise-Meitner-Str. 1 · D-85716 Unterschleißheim
Telefon (089) 32 15 01 - 0 · Telefax (089) 32 15 01 - 11
info@compumess.de · www.compumess.de · www.netzteile.de
2401 Stanwell Drive, Concord Ca. 94520 Ph: 925-687-4411 Fax: 925-687-3333 www.calex.com Email: sales@calex.com
4 1/9/09
CBAMTM PQ-28
Performance Data
Figs. 5, 6 & 7 show the output voltage for various input 34
voltages and loads. Fig. 8 shows Efciency vs. Input 32
30
Voltage. Note that with 11V input to the PQ-28, it can 28
30Vin 35Vin
handle an HEW with up to about a 75W output load. 26
For higher power loads on the HEW, the PQ must have 24
24Vin 28Vin
OUTPUT (VDC)
higher input voltages so that the input to the HEW does 22
not drop below it's UVLO dropout of 9V. 20
18
15Vin 20Vin
38 16
14
35 NO LOAD
12
50W 11Vin 12Vin
32
10
100W
29 8
0 50 100 150 200
POWER OUT (W)
26
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OUTPUT (VDC)
200W Figure 7. Output (V) vs Power (W)
23
over 11-35V input range
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20
17
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100%
14
98%
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11
100W 200W
96%
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8
11 16 21 26 31 36 41 46 51 56 61 66 71 76 81 86 91 96 101
INPUT (VDC) 94%
Figure 5. Output (V) vs Input Voltage (V) 92%
EFFICIENCY (%)
11V to 100V Input for various power out levels 50W
90%
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16
88%
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15
86%
14
84%
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13 NO LOAD 50W 100W
82%
OUTPUT (VDC)
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12 80%
11 16 21 26 31 36 41 46 51 56 61 66 71 76 81 86 91 96 101
11 INPUT (VDC)
150W 200W Figure 8. Efciency (%) vs. Input (V) for
P
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various loads.
9
8
11 12 13 14 15 16
INPUT (VDC)
Figure 6. Output (V) vs Input Voltage (V)
11V to 16V Input for various power out levels
CompuMess Elektronik GmbH · Lise-Meitner-Str. 1 · D-85716 Unterschleißheim
Telefon (089) 32 15 01 - 0 · Telefax (089) 32 15 01 - 11
info@compumess.de · www.compumess.de · www.netzteile.de
2401 Stanwell Drive, Concord Ca. 94520 Ph: 925-687-4411 Fax: 925-687-3333 www.calex.com Email: sales@calex.com
5 1/9/09
CBAMTM PQ-28
MIL-STD-1275B Testing 28VDC Input, CBus=100µF, 24S12.12HEW
Output load = 8A.
Testing to MIL-STD-1275B was done using non-certied CH1: PQ Input CH2: PQ Output
Calex in-house designed and built testers. The test circuits CH3: HEW Output
provide stresses to the PQ-28 that are comparable to
those indicated in the MIL-STD-1275B.
Spikes Imported Into EDUT
The PS MAIN power supply provides the steady state DC
voltage to the PQ-28 input. The PS SPIKE power supply
charges a 0.47µF capacitor to a selectable +250V or
-250V, which stores the 15mJ energy required for the test.
±250V pulses are the Single Fault values. The capacitor
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is then switched onto the PQ-28 Input. The input circuit
of the PQ-28 contains about 3.5µF of ceramic capacitors,
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which reduces the transferred voltage to about a 25V
change at the PQ-28 Input. Figure 9 shows the Spike
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Test Setup.
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Figure 9. Spike Test Setup Voltage Surges Imported into EDUT
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The MIL-STD-1275B calls for the input to surge up to
28VDC Input, CBus=100µF, 24S12.12HEW +100V which is the Single Fault value. This will not
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Output load = 8A. harm the PQ-28 as it is rated for 100V input. Figure 12
CH1: PQ Input CH2: PQ Output shows the Surge Test Setup. The PS MAIN power supply
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CH3: HEW Output supplies the normal 28VDC to the PQ-28 input. The PS
Surge power supply is set to 100V and when the FET
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SWITCH is closed, the +IN of the PQ-28 will go to +100V.
The diodes isolate the 2 power supplies.
Note that MIL-STD-1275B calls out for a 1ms rise or
fall time. Signicantly faster rises (shorter rise time) will
cause the output of the PQ-28 to overshoot more than
shown. The fall time of the Calex tester could no be
reduced to less than the 3 1/2 ms shown.
Figure 12. Surge Test Setup
Figure 10. Positive 250V Spike
CompuMess Elektronik GmbH · Lise-Meitner-Str. 1 · D-85716 Unterschleißheim
Telefon (089) 32 15 01 - 0 · Telefax (089) 32 15 01 - 11
info@compumess.de · www.compumess.de · www.netzteile.de
2401 Stanwell Drive, Concord Ca. 94520 Ph: 925-687-4411 Fax: 925-687-3333 www.calex.com Email: sales@calex.com
6 1/9/09
CBAMTM PQ-28
28VDC Input, CBus=100µF, 24S12.12HEW
Output load = 8A.
Ripple Voltage Imported into EDUT
CH1: PQ Input CH2: PQ Output The MIL-STD-1275B single fault condition calls out for a
CH3: HEW Output ±7V signal over the frequency range of 50Hz to 200kHz
to be superimposed onto the DC Input voltage. Several
testing problems arise. At about 8-10kHz the input is a
low impedance due to the series resonance of the internal
inductor and output capacitors. At 200kHz the input is a
low impedance due to the internal input capacitor array.
The problem is to nd a generator that can supply the
current at the required voltage and frequency. The Calex
tester could only produce a ±1.3V signal at the series
resonance of 8-10kHz which resulted in a ±7A into the
PQ-28 input. If a generator with a ±7V is available,
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it would have to be capable of supplying ±37A. Not a
simple task.
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At 200kHz the input of the PQ-28 is the internal capacitor
array of 4.3µF which equates to 0.18. This would
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require a generator with a ±38A capability at ±7V. The
Calex tester could only produce a ±0.8V at the PQ-28
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input.
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Figure 13. Positive slope input
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28VDC Input, CBus=100µF, 24S12.12HEW
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Output load = 8A.
CH1: PQ Input CH2: PQ Output
CH3: HEW Output
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Figure 15. Ripple Tester Block Diagram
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28VDC Input, CBus=100µF, 24S12.12HEW
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Output load = 8A.
CH1: PQ Input CH2: PQ Output
CH3: HEW Output
Figure 14. Negative slope input
Figure 16. 50Hz Ripple Signal
CompuMess Elektronik GmbH · Lise-Meitner-Str. 1 · D-85716 Unterschleißheim
Telefon (089) 32 15 01 - 0 · Telefax (089) 32 15 01 - 11
info@compumess.de · www.compumess.de · www.netzteile.de
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7 1/9/09
CBAMTM PQ-28
28VDC Input, CBus=100µF, 24S12.12HEW 28VDC Input, CBus=100µF, 24S12.12HEW
Output load = 8A. Output load = 8A.
CH1: PQ Input CH2: PQ Output CH1: PQ Input CH2: PQ Output
CH3: HEW Output CH3: HEW Output
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Figure 17. 1kHz Ripple Signal
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28VDC Input, CBus=100µF, 24S12.12HEW
Output load = 8A.
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28VDC Input, CBus=100µF, 24S12.12HEW
Output load = 8A.
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CH1: PQ Input CH2: PQ Output CH1: PQ Input CH2: PQ Output
CH3: HEW Output CH3: HEW Output
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Figure 18. 12kHz Ripple Signal Figure 20. 200kHz Ripple Signal
Adding an EMI lter in to the PQ-28
Input.
The EFIL-28 is not designed to meet the requirements of
MIL-STD-1275B. Consult the factory for information on
adding an EMI Filter.
CompuMess Elektronik GmbH · Lise-Meitner-Str. 1 · D-85716 Unterschleißheim
Telefon (089) 32 15 01 - 0 · Telefax (089) 32 15 01 - 11
info@compumess.de · www.compumess.de · www.netzteile.de
2401 Stanwell Drive, Concord Ca. 94520 Ph: 925-687-4411 Fax: 925-687-3333 www.calex.com Email: sales@calex.com
8 1/9/09