7.6A/400W

Technical
S pecification
PQ55530HEB08
48V in
53Vout
7.6Amp
2250Vdc
Half-brick
Input
Output
Current
Isolation
DC/DC Conver ter
Th e P Q55 530HEB0 8 P owerQo r ® Exa conver ter is an iso l a te d, fixed swit c hin g fr eq ue nc y DC /DC co nv er t er t ha t u s es
s y nc hr on ou s r ect ifi ca ti on t o ac hiev e e xtr eme ly high effic ien cy
a n d p ower d ens ity . Th is m od ul e is ide al ly s uited to s up p or t
th e IEEE 80 2.3 af sta nd ar d for P ower Ov er LAN a n d Vo IP
a p pl ica tion s. Th e 5 3Vo ut mod ul es fe atu re 2, 25 0Vd c iso la tio n and lo w comm on mo de no ise. T he Ex a s eri es co nver t e rs of fer ind u str y le ad in g u sea b le ou tpu t p ower fo r an y s tan dard “half-brick” module. RoHS compliant (see page 13 ).
Operational Features
• Ultra-high efficiency, 95% at full rated load current
• Delivers up to 400 Watts of output power with minimal
derating - optional open frame unit available
• Input voltage range: 38V – 55V, with 80V for 100ms
input transient capability
• Fixed frequency switching provides predictable EMI performance
• On-board input and output filtering
Mechanical Features
• Industry standard half-brick pin-out configuration
• Industry standard size: 2.3” x 2.4” (58.4 x 61.0mm)
• Total height only 0.50” (12.7mm) for baseplated unit,
open-frame only 0.420” (10.67mm)
• Total weight: 4.3 oz. (123 grams) for baseplated unit,
open-frame 2.6oz. (75 grams)
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 # PQ55530HEB08
Phone 1-888-567-9596
www.synqor.com
PQ55530HEB08 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
• Active back bias limit prevents damage to converter
from external load induced pre-bias
• Latching output over-voltage protection
• Thermal shutdown
Safety Features
• 2250V, 30 MW input-to-output isolation
• UL/cUL 60950-1 recognized (US & Canada), basic
insulation rating
• TUV certified to EN60950-1
• Meets 72/23/EEC and 93/68/EEC directives
• Meets UL94V-0 flammability requirements
Doc.# 005-2HEB53P Rev. B
10/4/07
Page 1
Input:
Output:
Current:
Package:
Technical Specification
MECHANICAL
DIAGRAM
(base-plated)
38-55 V
53 V
7.6 A
Half-brick
2.40
(61.0)
2.00
(50.8)
1.400
(35.56)
0.20
(5.1)
1.000
(25.40)
0.20
0.700
(5.1)
(17.78)
0.400
(10.16)
Side View
0.50
Top View
1.90
(12.7)
(48.3)
1.90
(48.3)
2.30
(58.4)
0.19
.030 +.028
(0.81 +.71)
Bottom side
Clearance
(4.8)
Lowest
Component
Load Board
Flanged Pin
See Note 12
0.145 typ.
(3.68)
See Note 6
M3 Threaded
Standoff
4 Places
See Note 1
0.400
(10.16)
0.50
(12.6)
Pin Farside
Typical
1.400
(35.56)
NOTES
PIN DESIGNATIONS
1) M3 screws used to bolt unit’s baseplate to other surfaces (such
as heatsink) must not exceed 0.100” (2.54 mm) depth below
the surface of the baseplate.
2) Applied torque per screw should not exceed 6in-lb. (0.7 Nm)
3) Baseplate flatness tolerance is 0.004” (.10mm) TIR for surface
4) Pins 1, 2, 4, 6-8, are 0.040” (1.02mm) diameter with 0.080”
(2.03mm) diameter standoff shoulders
5) Pins 5, 9 are 0.080” (2.03mm) diameter shoulderless pins.
6) Other pin extension lengths available
7) All Pins: Material - Copper Alloy
Finish (RoHS 5/6) - Tin/Lead over Nickel plate
Finish (RoHS 6/6) - Matte Tin over Nickel plate
8) Undimensioned components are shown for visual reference only.
9) Weight: 4.3 oz. (123 g) typical
10) All dimensions in inches (mm)
Tolerances: x.xx +/-0.02 in. (x.x +/-0.5mm)
x.xxx +/-0.010 in. (x.xx +/-0.25mm)
11) Workmanship: Meets or exceeds IPC-A-610C Class II
12) For information regarding soldering and cleaning of base-plated units please refer to the “Base-Plate Soldering & Cleaning product advisory” on our website’s Technical Documents page.
Product # PQ55530HEB08
Phone 1-888-567-9596
Pin No. Name
Function
1
Vin(+)
Positive input voltage
2
ON/OFF
TTL input to turn converter
on and off, referenced to
Vin(-), with internal pull up.
4
Vin(-)
Negative input voltage
5
Vout(-)
Negative output voltage
6
SENSE(-)
Return remote sense
7
TRIM
Output voltage trim
8
SENSE(+)
Positive remote sense
9
Vout(+)
Positive output voltage
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.
www.synqor.com
Doc.# 005-2HEB53P Rev. B
10/4/07
Page 2
Input:
Output:
Current:
Package:
Technical Specification
MECHANICAL
DIAGRAM
(open frame)
38-55 V
53 V
7.6 A
Half-brick
1.40
1.000
.700
.400
(35.56)
(35.56)
(17.78)
(10.16)
Side View
2.30
(58.4)
0.420
(10.67)
1.90
Top View
(48.3)
.030 +.028
(0.81 +.71)
Bottom side
Clearance
Lowest
Component
Flanged Pin
See Note 10
0.145 typ.
(3.68)
See Note 3
Load Board
.400
.19
.50
(4.8)
(12.7)
(10.16)
1.40
(35.56)
2.40
(61.0)
NOTES
1) Pins 1-4, 6-8 are 0.040” (1.02mm) diameter. with
0.080” (2.03mm) diameter standoff shoulders.
2) Pins 5 and 9 are 0.080” (2.03 mm) diameter with
0.125” (3.18mm) 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: 2.6 oz. (75 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)
PIN DESIGNATIONS
Pin connections are identical to baseplated version
shown on page 2. Use “A” as 10th letter in part
number for open frame version (see ordering page).
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.
Product # PQ55530HEB08
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-2HEB53P Rev. B
10/4/07
Page 3
Input:
Output:
Current:
Package:
Technical Specification
38-55 V
53 V
7.6 A
Half-brick
PQ55530HEx08 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
80
60
80
2250
100
125
18
V
V
V
V
°C
°C
V
Notes & Conditions
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
Inrush Current Transient Rating
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 (standard option)
Output Voltage Set Point (“A” option3)
Output Voltage Regulation
Over Line
Over Load
Over Temperature (standard option)
Over Temperature (“A” option3)
Total Output Voltage Range
Output Voltage Ripple and Noise1
Peak-to-Peak
RMS
Operating Output Current Range
Output DC Current-Limit Inception
Back-Drive Current Limit while Enabled
Back-Drive Current Limit while Disabled
Maximum Output Capacitance
-40
-55
-2
38
48
55
V
34.0
32.0
35.2
33.0
2.1
36.4
34.3
V
V
V
A
mA
mA
A 2s
mA
mA
A
µH\µF
µF
140
42
20
130
1.0\5.0
100
52.50
52.75
51.95
0
9.5
0.5
50
DYNAMIC CHARACTERISTICS
Input Voltage Ripple Rejection
Output Voltage during Load Current Transient
For a Step Change in Output Current (0.1A/µs)
For a Step Change in Output Current (1A/µs)
Settling Time
Turn-On Transient
Turn-On Time
Start-Up Delay Time
Output Voltage Overshoot
EFFICIENCY
100% Load
50% Load
15
4
53.00
53.00
11.8
68
0.01
40
20
53.50
53.25
+0.05 \ 20 +0.1 \ 50
+0.15 \ 80 +0.2 \ 105
+100
+158
+50
+79
53.95
Vin = 38V
RMS thru 4.7µH inductor; Figures 16 & 18
RMS; Figures 12 & 17
Fast blow external fuse recommended
Internal values; see Figure D
Typical ESR 0.04 -1.0W; see Figure 16
V
V
%\mV
%\mV
mV
mV
V
mV
mV
A
A
A
mA
µF
60
dB
120 Hz; Figure 20
600
600
600
mV
mV
µs
50-75-50% Iout max; 200µF cap; Figure 13
50-75-50% Iout max; 200µF cap; Figure 14
To within 0.2% Vout nom
ms
ms
%
Full load, Vout=90% nom.; Figures 11 & 12
-40°C to +125°C; Figure E
1,000 µF load capacitance, Iout = 0A
%
%
Figures 1 - 4
Figures 1 - 4
°C
°C
°C
°C
Package rated to 150°C
UL rated max operating temp 130°C
See Figures 5, 7 - 10 for derating curves
Applies to PQ55525HEB08xxx unit only
150
20
10.5
1.38
90
20
6
0
TEMPERATURE LIMITS FOR POWER DERATING CURVES
Semiconductor Junction Temperature
Board Temperature
Transformer Temperature
Maximum Baseplate Temperature
Isolation Voltage (dielectric strength)
Isolation Resistance
Isolation Capacitance2
100% Load, 38 Vin, trim up 5%
Over sample, line, load, temperature & life
20MHz bandwidth; Figures 15 & 16
Full Load; see Figures 16 & 19
Full Load; see Figures 16 & 19
Subject to thermal derating; Figures 5, 7 - 10
Output Voltage 10% Low; Figure 20
54V pre-bias voltage on output
"
53Vout at 7.6A Resistive Load
50
7.6
11.5
2.0
120
1,000
28
8
95
95
ISOLATION CHARACTERISTICS
Continuous
Continuous
100ms transient
Basic insulation level, Pollution degree 2
125
125
125
100
2250
30
220
V
MW
pF
Note 1: For applications requiring reduced output voltage ripple and noise, consult SynQor applications support (e-mail: [email protected])
Note 2: Higher values of isolation capacitance can be added external to the module.
Note 3: See the last page for ordering information options.
Product # PQ55530HEB08
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-2HEB53P Rev. B
10/4/07
Page 4
Input:
Output:
Current:
Package:
Technical Specification
38-55 V
53 V
7.6 A
Half-brick
ELECTRICAL CHARACTERISTICS (Continued)
Parameter P
FEATURE CHARACTERISTICS
Switching Frequency
ON/OFF Control (Option P)
Off-State Voltage
On-State Voltage
ON/OFF Control (Option N)
Off-State Voltage
On-State Voltage
ON/OFF Control (Either Option)
Pull-Up Voltage
Pull-Up Resistance
Output Voltage Trim Range
Output Voltage Remote Sense Range
Output Over-Voltage Protection
Over-Temperature Shutdown
Over-Temperature Shutdown Restart Hysteresis
Load Current Scale Factor
Min.
Typ.
Max.
Units
275
300
325
kHz
-2
2.7
0.8
18
V
V
2.7
-2
18
0.8
V
V
5.5
V
kW
%
%
V
°C
°C
-50
57
RELIABILITY CHARACTERISTICS
Calculated MTBF (Telcordia)
Calculated MTBF (MIL-217)
Field Demonstrated MTBF
5
10
58.5
125
10
180
+5
+5
60
Notes & Conditions
Regulation and Isolation stages
Figure A
Measured across Pins 9 & 5; Figure B
Measured across Pins 9 & 5
Over full temp range; % of nominal Vout, Latching
Average PCB Temperature
See App Note: Output Load Current Calc.
10 Hrs. TR-NWT-000332; 80% load,300LFM, 40oC Ta
106 Hrs. MIL-HDBK-217F; 80% load, 300LFM, 40oC Ta
106 Hrs. See our website for details
6
1.9
1.4
STANDARDS COMPLIANCE
Parameter P
Notes
STANDARDS COMPLIANCE
UL/cUL 60950-1
EN60950-1
72/23/EEC
93/68/EEC
Needle Flame Test (IEC 695-2-2)
IEC 61000-4-2
GR-1089-CORE
Telcordia (Bellcore) GR-513
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
• 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
Life Test
Vibration
Mechanical Shock
Temperature Cycling
Power/Thermal Cycling
Design Marginality
Humidity
Solderability
# Units
32
5
5
10
5
5
5
15 pins
Test Conditions
95% rated Vin and load, units at derating point, 1000 hours
10-55Hz sweep, 0.060” total excursion,1 min./sweep, 120 sweeps for 3 axis
100g minimum, 2 drops in x and y axis, 1 drop in z axis
-40°C to 100°C, unit temp. ramp 15°C/min., 500 cycles
Toperating = min to max, Vin = min to max, full load, 100 cycles
Tmin-10°C to Tmax+10°C, 5°C steps, Vin = min to max, 0-105% load
85°C, 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
PATENTS
SynQor provides various options for Logic Sense, Pin Length and
Feature Set for this family of DC/DC converters. Please consult the
last page of this specification sheet for information on available
options.
SynQor is protected under various patents, including but not limited to U.S. Patent #s 5,999,417; 6,222,742 B1; 6,594,159
B2; 6,545,890 B2.
Product # PQ55530HEB08
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-2HEB53P Rev. B
10/4/07
Page 5
Input:
Output:
Current:
Package:
Technical Specification
100
38-55 V
53 V
7.6 A
Half-brick
99
98
95
96
Efficiency (%)
Efficiency (%)
97
90
85
80
75
95
94
93
38 Vin
48 Vin
92
55 Vin
25C
40C
91
55C
70
90
0.0
0.8
1.5
2.3
3.0
3.8
4.6
5.3
6.1
6.8
7.6
100
200
Load Current (A)
300
400
Air Flow (LFM)
Figure 1: Efficiency at nominal output voltage vs. load current for minimum, nominal, and maximum input voltage at 25°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).
24
16.0
22
15.0
18
Power Dissipation (W)
Power Dissipation (W)
20
16
14
12
10
8
6
38 Vin
48 Vin
55 Vin
4
2
14.0
13.0
12.0
11.0
10.0
25C
40C
9.0
0
55C
8.0
0.0
0.8
1.5
2.3
3.0
3.8
4.6
5.3
6.1
6.8
7.6
100
200
Load Current (A)
Figure 3: Power dissipation at nominal output voltage vs. load current
for minimum, nominal, and maximum input voltage at 25°C.
70
7
60
Output Voltage (V)
6
5
Iout (A)
400
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).
8
4
3
400 LFM (2.0 m/s)
2
300
Air Flow (LFM)
OVP Shutdown
50
40
30
20
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
1
10
35-75Vin
100 LFM (0.5 m/s)
0
0
0
25
40
55
70
-5
85
Ambient Air Temperature (ºC)
Phone 1-888-567-9596
5
10
15
Load Current (A)
Figure 5: Maximum output power derating curves vs. ambient air temperature
for a baseplated unit (full power at 100°C baseplate). Airflow rates of 100 LFM
through 400 LFM with air flowing from input to output (nominal input voltage).
Product # PQ55530HEB08
0
Figure 6: Output voltage vs. load current showing typical current limit
curves and converter shutdown points.
www.synqor.com
Doc.# 005-2HEB53P Rev. B
10/4/07
Page 6
Input:
Output:
Current:
Package:
Technical Specification
38-55 V
53 V
7.6 A
Half-brick
8
7
6
Iout (A)
5
4
3
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
2
200 LFM (1.0 m/s)
1
100 LFM (0.5 m/s)
0
0
25
40
55
70
85
Ambient Air Temperature (ºC)
Figure 7: Maximum output power derating curves vs. ambient air temperature for an open frame unit. Airflow rates of 100 LFM through 400
LFM with air flowing from input to output (nominal input voltage).
Figure 8: Thermal plot of converter at 5.1amp load current (271W)
with 55°C air flowing at the rate of 200 LFM. Air is flowing across the
converter from input to output (nominal input voltage).
8
7
6
Iout (A)
5
4
3
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
2
200 LFM (1.0 m/s)
1
100 LFM (0.5 m/s)
0
0
25
40
55
70
85
Ambient Air Temperature (ºC)
Figure 9: Maximum output power derating curves vs. ambient air temperature for an open frame unit. Airflow rates of 100 LFM through 400
LFM with air flowing from pin 1 to pin 4 (nominal input voltage).
Figure 10: Thermal plot of converter at 4.95 amp load current (262W)
with 55°C air flowing at the rate of 200 LFM. Air is flowing across the
converter from pin 1 to pin 4 (nominal input voltage).
Figure 11: Turn-on transient at full load (resistive load) (20 ms/div).
Input voltage pre-applied. Top Trace: Vout (10V/div). Bottom Trace:
ON/OFF input (5V/div)
Figure 12: Turn-on transient at zero load (20 ms/div).
Top Trace: Vout (10V/div)
Bottom Trace: ON/OFF input (5V/div)
Product # PQ55530HEB08
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Doc.# 005-2HEB53P Rev. B
10/4/07
Page 7
Input:
Output:
Current:
Package:
Technical Specification
Figure 13: Output voltage response to step-change in load current (50%-75%50% of Iout(max); dI/dt = 0.1A/µ s). Load cap: 200µ F, electrolytic output capacitance. Top trace: Vout (500mV/div), Bottom trace: Iout (2A/div).
38-55 V
53 V
7.6 A
Half-brick
Figure 14: Output voltage response to step-change in load current (50%-75%50% of Iout(max): dI/dt = 1A/µ s). Load cap: 330µ F, electrolytic output capacitance. Top trace: Vout (500mV/div), Bottom trace: Iout (2A/div).
See Fig. 18
4.7 µH
source
impedance
See Fig. 17
See Fig. 19
DC/DC
Converter
VSOURCE
100 µF,
<1W ESR
electrolytic
capacitor
VOUT
1 µF
200 µF,
ceramic 200mW ESR
capacitor electrolytic
capacitor
Figure 15: Output voltage response to step-change in input voltage
(1000V/ms). Load cap: 200µ F, electrolytic output capacitance. Ch 1: Vin
(20V/div), Ch 2: Vout (500mV/div).
Figure 16: Test set-up diagram showing measurement points for Input
Terminal Ripple Current (Figure 17), Input Reflected Ripple Current
(Figure 18) and Output Voltage Ripple (Figure 19).
Figure 17: Input Terminal Ripple Current, ic, at full rated output current and nominal input voltage with 4.7µ H source inductor and 100µ F
electrolytic capacitor (100 mA/div). See Figure 16
Figure 18: Input reflected ripple current, is, through a 4.7 µ H source
inductor at nominal input voltage and rated load current (10 mA/div).
(See Figure 16)
Product # PQ55530HEB08
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-2HEB53P Rev. B
10/4/07
Page 8
Input:
Output:
Current:
Package:
Technical Specification
Figure 19: Output voltage ripple at nominal input voltage and rated
load current (50 mV/div). Load capacitance: 1µ F ceramic capacitor
and 200µ F tantalum capacitor. Bandwidth: 20 MHz. (See Figure 12)
38-55 V
53 V
7.6 A
Half-brick
Figure 20: Load current (5A/div) as a function of time when the converter attempts to turn on into a 1 mW short circuit.
0
1
Forward Transmission (dB)
Output Impedance (ohms)
-10
0.1
0.01
0.001
35 Vin
48 Vin
-20
-30
-40
-50
-60
-70
35 Vin
-80
48 Vin
-90
55 Vin
55 Vin
-100
0.0001
100
1,000
10,000
10
100,000
100
Figure 21: Magnitude of incremental output impedance (Zout =
vout/iout) for minimum, nominal, and maximum input voltage at full
rated power.
10,000
100,000
Figure 22: Magnitude of incremental forward transmission (FT =
vout/vin) for minimum, nominal, and maximum input voltage at full
rated power.
10
100
0
Input Impedance (ohms)
Reverse Transmission (dB)
1,000
Hz
Hz
-10
-20
-30
35 Vin
10
1
35 Vin
48 Vin
-40
48 Vin
55 Vin
55 Vin
-50
0.1
10
100
1,000
10,000
100,000
10
Hz
Phone 1-888-567-9596
1,000
10,000
100,000
Hz
Figure 23: Magnitude of incremental reverse transmission (RT =
iin/iout) for minimum, nominal, and maximum input voltage at full rated
power.
Product # PQ55530HEB08
100
Figure 24: Magnitude of incremental input impedance (Zin = vin/iin)
for minimum, nominal, and maximum input voltage at full rated power.
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Technical Specification
BASIC OPERATION AND FEATURES
The PowerQor series converter uses a two-stage power conversion topology. The first stage is a buck-converter that keeps the
output voltage constant over variations in line, load, and temperature. The second stage uses a transformer to provide the functions of input/output isolation and voltage step-down to achieve
the low output voltage required.
Both the first stage and the second stage switch at a fixed frequency for predictable EMI performance. Rectification of the
transformer’s output is accomplished with synchronous rectifiers.
These devices, which are MOSFETs with a very low on-state resistance, dissipate far less energy than Schottky diodes. This is the
primary reason that the PowerQor converter has such high efficiency, even at very low output voltages and very high output currents.
The PowerQor series of half-brick and quarter-brick converters
uses the industry standard footprint and pin-out configuration.
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(_)
Vin(_)
Vin(_)
Remote Enable Circuit
Negative Logic
(Permanently Enabled)
ON/OFF
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.
REMOTE SENSE(+) (Pins 8 and 6): The SENSE(+) inputs correct for voltage drops along the conductors that connect the converter’s output pins to the load.
Pin 8 should be connected to Vout(+) and Pin 6 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 8 and 6 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 9 and 5) to determine when it should trigger, not the voltage across the converter’s sense leads (pins 8
and 6). Therefore, the resistive drop on the board should be
small enough so that output OVP does not trigger, even during
load transients.
Positive Logic
(Permanently Enabled)
5V
TTL/
CMOS
ON/OFF
Vin(_)
Vin(_)
Open Collector Enable Circuit
38-55 V
53 V
7.6 A
Half-brick
Direct Logic Drive
Figure A: Various circuits for driving the ON/OFF pin.
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Technical Specification
OUTPUT VOLTAGE TRIM (Pin 7): 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 7 and Pin 6 (SENSE(-) input). For a desired decrease
of the nominal output voltage, the value of the resistor should be
Rtrim-down =
-2
(100%
D )
(kW)
where
D% =
Vnominal – Vdesired
Vnominal
x 100%
To increase the output voltage, the user should connect a resistor
between Pin 7 and Pin 8 (SENSE(+) input). For a desired increase
of the nominal output voltage, the value of the resistor should be
Rtrim-up =
nominal – 2
(V1.225
)xV
DES
+ VNOM
(kW)
VDES - VNOM
Figure B 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.
Trim Resistance (kOhms)
100,000
38-55 V
53 V
7.6 A
Half-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: If the load current is increased to the
current limit threshold, the current will be limited at that value,
and the output voltage will decrease as the load resistance is lowered. When the load current is decreased below the current limit
point, the voltage will recover to the normal, regulated level.
Note: If the unit is held in overcurrent and the load is suddenly
reduced to zero, an output voltage overshoot can occur and possibly trip the overvoltage protection.
Output Over-Voltage Protection: If the voltage across the
output pins exceeds the Output Over-Voltage Protection threshold,
the converter will immediately shut down and latch off. To reset
this latched fault condition, either the ON/OFF pin must be toggled from on to off and back on again or the input power must
be removed and re-applied.
10,000
1,000
100
10
1
0
2
4
6
8
10
% Increase in Vout
12
14
16
18
20
% Decrease in Vout
Figure B: Trim Graph for 53Vout 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.
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.
It is not necessary for the user to add capacitance at the Trim pin.
The node is internally bypassed to eliminate noise.
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Technical Specification
APPLICATION CONSIDERATIONS
Input System Instability: This condition can occur because
any DC/DC converter appears incrementally as a negative
resistance load. A detailed application note titled “Input
System Instability” is available on the SynQor website which
provides an understanding of why this instability arises, and
shows the preferred solution for correcting it.
38-55 V
53 V
7.6 A
Half-brick
Startup Inhibit Period: The Startup Inhibit Period ensures that
the converter will remain off for approximately 6ms when it is
shut down for any reason. In all, there are three ways that the
converter can be shut down, initiating a Startup Inhibit Period:
• Input Under-Voltage Lockout
• Over Temperature Shutdown
• Turned off by the ON/OFF input
Application Circuits: Figure C provides a typical circuit diagram which details the input filtering and voltage trimming.
Figure E shows three turn-on scenarios, where a Startup Inhibit
Period is initiated at t0, t1, and t2:
Input Filtering and External Capacitance: Figure D provides a diagram showing the internal input filter components.
This filter dramatically reduces input terminal ripple current,
which otherwise could exceed the rating of an external electrolytic input capacitor. The recommended external input capacitance is specified in the “Input Characteristics” section. More
detailed information is available in the application note titled
“EMI Characteristics” on the SynQor website.
Before time t0, when the input voltage is below the UVL threshold,
the unit is disabled by the Input Under-Voltage Lockout feature.
When the input voltage rises above the UVL threshold, the Input
Under-Voltage Lockout is released, and a Startup Inhibit Period is
initiated. At the end of this delay, the ON/OFF pin is evaluated,
and since it is active, the unit turns on.
At time t1, the unit is disabled by the ON/OFF pin, and it cannot
be enabled again until the Startup Inhibit Period has elapsed.
If the input voltage quickly rises over UVLO at t3, the output startup time is 12ms.
Vin(+)
Vin
External
Input
Filter
100µF
Vout(+)
Vsense(+)
Electrolytic
Capacitor
ON/OFF
Trim
Vsense(_)
Vin(_)
Rtrim-up
or
Rtrim-down
Cload
Iload
Vout(_)
Figure C: Typical application circuit (negative logic unit, permanently enabled).
L
Vin(+)
C
Vin(_)
Figure D: Internal Input Filter Diagram (component values listed on page 4).
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38-55 V
53 V
7.6 A
Half-brick
Vin
Under-Voltage
Lockout Turn-On
Threshold
ON/OFF
(pos logic)
OFF
ON
ON
21mS
Vout
6mS
t0
12mS
6mS
t1
t2
t3
Figure E: Startup Inhibit Period (turn-on time not to scale)
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 5/6 RoHS compliant (product with lead) or 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
[email protected]
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Input:
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Current:
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Technical Specification
38-55 V
53 V
7.6 A
Half-brick
PART NUMBERING SYSTEM
ORDERING INFORMATION
The part numbering system for SynQor’s PowerQor DC/DC
converters follows the format shown in the example below.
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. To
order 6/6 RoHS compliant product please add a “-G” suffix.
PQ 55 530 H E B 08 N N S
Options
(see
Ordering Information)
Output Current
Thermal Design
Performance Level
Package Size
Output Voltage
Model Number
Input Voltage
PQ55530HEA08 xyz
PQ55530HEB08 xyz
38 - 55 V
38 - 55 V
Output Max Output
Voltage
Current
53.0 V
7.6 A
53.0 V
7.6 A
The following option choices must be included in place of the
x y z spaces in the model numbers listed above.
Input Voltage
Product Family
Options Description: x y z
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 6/6 RoHS compliance.
Enable
Logic
P - Positive
N - Negative
Pin
Length
K - 0.110"
N - 0.145"
R - 0.180"
Y - 0.250"
Feature
Set
S - Standard
A - Tight Accuracy
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:
Product # PQ55530HEB08
978-849-0600
888-567-9596
978-849-0602
[email protected]
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.
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10/4/07
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