PQ55530HEB08PYA [SYNQOR]
Half-brick DC/DC Converter; 半砖DC / DC转换器
| 型号： | PQ55530HEB08PYA |
| 厂家： | 
SYNQOR WORLDWIDE HEADQUARTERS |
| 描述： | Half-brick DC/DC Converter |
| 文件： | 总14页 (文件大小：631K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Technical
Specification
PQ55530HEB08
48Vin 53Vout 7.6Amp 2250Vdc
Half-brick
DC/DC Converter
Input
Output
Current
Isolation
®®
The PPQ55530HEB08 PPowerQor Exa cconverter iis aan iiso-
lated, ffixed sswitching ffrequency DDC/DC cconverter tthat uuses
synchronous rectification to achieve extremely high efficiency
and ppower ddensity. TThis mmodule iis iideally suited tto ssupport
the IIEEE 8802.3af sstandard ffor PPower OOver LLAN aand VVoIP
applications. TThe 553Vout mmodules ffeature 22,250Vdc iisola-
tion aand llow ccommon mmode nnoise. TThe EExa sseries cconvert-
ers offer industry leading useable output power for any stan-
dard ““half-brick” mmodule. RRoHS ccompliant ((see ppage 113).
Operational Features
• Ultra-high efficiency, 95% at full rated load current
• Delivers up to 400 Watts of output power with minimal
PQ55530HEB08 Module
derating - optional open frame unit available
• Input voltage range: 38V – 55V, with 80V for 100ms
input transient capability
• Fixed frequency switching provides predictable EMI per-
Protection Features
formance
• On-board input and output filtering
• 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
Mechanical Features
• Industry standard half-brick pin-out configuration
• Latching output over-voltage protection
• Thermal shutdown
• 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)
Safety Features
• 2250V, 30 MΩ input-to-output isolation
• UL/cUL 60950-1 recognized (US & Canada), basic
Control Features
insulation rating
• On/Off control referenced to input side (positive and
negative logic options are available)
• TUV certified to EN60950-1
• Meets 72/23/EEC and 93/68/EEC directives
• Meets UL94V-0 flammability requirements
• 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
Doc.# 005-2HEB53P Rev. B
10/4/07
Page 1
Input:
Output:
Current:
Package:
38-55 V
53 V
7.6 A
Half-brick
Technical Specification
MECHANICAL
DIAGRAM
(base-plated)
2.40
(61.0)
2.00
(50.8)
1.400
(35.56)
0.20
(5.1)
1.000
(25.40)
0.20
(5.1)
0.700
(17.78)
0.400
(10.16)
Side View
Top View
0.50
(12.7)
1.90
(48.3)
1.90
(48.3)
2.30
(58.4)
0.19
(4.8)
.030 +.028
(0.81 +.71)
Lowest
Component
Flanged Pin
See Note 12
0.145 typ.
Bottom side
Clearance
(3.68)
See Note 6
Load Board
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.
Pin No. Name
Function
1
2
Vin(+)
Positive input voltage
2) Applied torque per screw should not exceed 6in-lb. (0.7 Nm)
3) Baseplate flatness tolerance is 0.004” (.10mm) TIR for surface
ON/OFF
TTL input to turn converter
on and off, referenced to
Vin(-), with internal pull up.
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
4
5
6
7
8
9
Vin(-)
Vout(-)
SENSE(-)
TRIM
SENSE(+)
Vout(+)
Negative input voltage
Negative output voltage
Return remote sense
Output voltage trim
Positive remote sense
Positive output voltage
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-plat-
ed units please refer to the “Base-Plate Soldering & Cleaning prod-
uct advisory” on our website’s Technical Documents page.
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.
Product # PQ55530HEB08
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-2HEB53P Rev. B
10/4/07
Page 2
Input:
Output:
Current:
Package:
38-55 V
53 V
7.6 A
Half-brick
Technical Specification
MECHANICAL
DIAGRAM
(open frame)
1.40
(35.56)
1.000
(35.56)
.700
(17.78)
.400
(10.16)
Side View
2.30
(58.4)
0.420
(10.67)
1.90
(48.3)
Top View
.030 +.028
(0.81 +.71)
0.145 typ.
Lowest
Component
Bottom side
Clearance
Flanged Pin
See Note 10
(3.68)
See Note 3
Load Board
.400
(10.16)
.50
(12.7)
.19
(4.8)
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.
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).
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)
between input and output for Basic insulation. This issue should be con-
sidered 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:
38-55 V
53 V
7.6 A
Half-brick
Technical Specification
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 Notes & Conditions
ABSOLUTE MAXIMUM RATINGS
Input Voltage
Non-Operating
80
60
V
V
Continuous
Operating
Continuous
Operating Transient Protection
80
V
100ms transient
Isolation Voltage (input to output)
Operating Temperature
2250
100
125
18
V
Basic insulation level, Pollution degree 2
-40
-55
-2
°C
°C
V
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
38
48
55
V
34.0
32.0
35.2
33.0
2.1
36.4
34.3
V
V
V
11.8
A
100% Load, 38 Vin, trim up 5%
Vin = 38V
No-Load Input Current
140
42
mA
mA
Disabled Input Current
68
0.01
40
2
Inrush Current Transient Rating
Input Reflected Ripple Current
Input Terminal Ripple Current
Recommended Input Fuse
A s
20
mA
mA
A
RMS thru 4.7µH inductor; Figures 16 & 18
RMS; Figures 12 & 17
130
20
Fast blow external fuse recommended
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
1.0\5.0
100
µH\µF Internal values; see Figure D
µF
Typical ESR 0.04 -1.0Ω; see Figure 16
52.50
52.75
53.00
53.00
53.50
53.25
V
V
+
+
+
0.05 \ 20 0.1 \ 50
%\mV
+
Over Load
0.15 \ 80 0.2 \ 105 %\mV
+
+
158
Over Temperature (standard option)
Over Temperature (“A” option3)
Total Output Voltage Range
100
mV
mV
V
+
+
79
50
51.95
53.95
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
"
1
Output Voltage Ripple and Noise
Peak-to-Peak
150
20
mV
mV
A
RMS
50
7.6
Operating Output Current Range
Output DC Current-Limit Inception
Back-Drive Current Limit while Enabled
Back-Drive Current Limit while Disabled
Maximum Output Capacitance
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
0
9.5
0.5
50
10.5
1.38
90
11.5
2.0
A
A
120
1,000
mA
µF
53Vout at 7.6A Resistive Load
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
Turn-On Transient
Turn-On Time
15
4
20
6
28
8
ms
ms
%
Full load, Vout=90% nom.; Figures 11 & 12
-40°C to +125°C; Figure E
Start-Up Delay Time
Output Voltage Overshoot
EFFICIENCY
0
1,000 µF load capacitance, Iout = 0A
100% Load
95
95
%
%
Figures 1 - 4
Figures 1 - 4
50% Load
TEMPERATURE LIMITS FOR POWER DERATING CURVES
Semiconductor Junction Temperature
Board Temperature
125
125
125
100
°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
Transformer Temperature
Maximum Baseplate Temperature
ISOLATION CHARACTERISTICS
Isolation Voltage (dielectric strength)
Isolation Resistance
2250
30
V
M
Ω
Isolation Capacitance2
220
pF
Note 1: 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.
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:
38-55 V
53 V
7.6 A
Half-brick
Technical Specification
ELECTRICAL CHARACTERISTICS (Continued)
Parameter
P
Min.
Typ.
Max.
Units Notes & Conditions
FEATURE CHARACTERISTICS
Switching Frequency
275
300
325
kHz
Regulation and Isolation stages
ON/OFF Control (Option P)
Off-State Voltage
-2
0.8
18
V
V
On-State Voltage
2.7
ON/OFF Control (Option N)
Off-State Voltage
2.7
-2
18
V
V
On-State Voltage
0.8
ON/OFF Control (Either Option)
Pull-Up Voltage
Figure A
5
5.5
V
Pull-Up Resistance
10
k
Ω
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
RELIABILITY CHARACTERISTICS
Calculated MTBF (Telcordia)
Calculated MTBF (MIL-217)
Field Demonstrated MTBF
-50
57
+5
+5
60
%
Measured across Pins 9 & 5; Figure B
Measured across Pins 9 & 5
%
V
58.5
125
10
Over full temp range; % of nominal Vout, Latching
Average PCB Temperature
°C
°C
180
See App Note: Output Load Current Calc.
o
1.9
1.4
106 Hrs. TR-NWT-000332; 80% load,300LFM, 40 C T
a
a
106 Hrs. MIL-HDBK-217F; 80% load, 300LFM, 40 C T
o
106 Hrs. See our website for details
STANDARDS COMPLIANCE
Parameter
P
Notes
STANDARDS COMPLIANCE
UL/cUL 60950-1
File # E194341, Basic insulation & pollution degree 2
Certified by TUV
EN60950-1
72/23/EEC
93/68/EEC
Needle Flame Test (IEC 695-2-2)
IEC 61000-4-2
Test on entire assembly; board & plastic components UL94V-0 compliant
ESD test, 8kV - NP, 15kV air - NP (Normal Performance)
GR-1089-CORE
Section 7 - electrical safety, Section 9 - bonding/grounding
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
# Units Test Conditions
QUALIFICATION TESTING
Life Test
32
95% rated Vin and load, units at derating point, 1000 hours
Vibration
5
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
Mechanical Shock
Temperature Cycling
Power/Thermal Cycling
Design Marginality
Humidity
5
10
5
5
5
Solderability
15 pins
•
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 SynQor is protected under various patents, including but not lim-
Feature Set for this family of DC/DC converters. Please consult the ited to U.S. Patent #s 5,999,417; 6,222,742 B1; 6,594,159
last page of this specification sheet for information on available B2; 6,545,890 B2.
options.
Product # PQ55530HEB08
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-2HEB53P Rev. B
10/4/07
Page 5
Input:
Output:
Current:
Package:
38-55 V
53 V
7.6 A
Half-brick
Technical Specification
100
95
90
85
80
75
70
99
98
97
96
95
94
93
92
91
90
38 Vin
48 Vin
55 Vin
25C
40C
55C
0.0
0.8
1.5
2.3
3.0
3.8
4.6
5.3
6.1
6.8
7.6
100
200
300
400
Load Current (A)
Air Flow (LFM)
Figure 1: Efficiency at nominal output voltage vs. load current for min-
Figure 2: Efficiency at nominal output voltage and 60% rated power vs.
imum, nominal, and maximum input voltage at 25
°
C.
airflow rate for ambient air temperatures of 25
(nominal input voltage).
°
C, 40°C, and 55°C
24
22
20
18
16
14
12
10
8
16.0
15.0
14.0
13.0
12.0
11.0
10.0
9.0
6
38 Vin
48 Vin
55 Vin
25C
40C
55C
4
2
0
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
300
400
Load Current (A)
Air Flow (LFM)
Figure 3: Power dissipation at nominal output voltage vs. load current
Figure 4: Power dissipation at nominal output voltage and 60% rated
for minimum, nominal, and maximum input voltage at 25
°C.
power vs. airflow rate for ambient air temperatures of 25
°
C, 40
°
C, and
55
°C (nominal input voltage).
8
7
6
5
4
70
OVP Shutdown
60
50
40
30
20
10
0
3
400 LFM (2.0 m/s)
2
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
35-75Vin
1
100 LFM (0.5 m/s)
0
-5
0
5
10
15
0
25
40
55
70
85
Ambient Air Temperature (ºC)
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).
Figure 6: Output voltage vs. load current showing typical current limit
curves and converter shutdown points.
°
Product # PQ55530HEB08
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-2HEB53P Rev. B
10/4/07
Page 6
Input:
Output:
Current:
Package:
38-55 V
53 V
7.6 A
Half-brick
Technical Specification
8
7
6
5
4
3
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
2
1
0
0
25
40
55
70
85
Ambient Air Temperature (ºC)
Figure 7: Maximum output power derating curves vs. ambient air tem-
perature 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
5
4
3
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
2
1
0
0
25
40
55
70
85
Ambient Air Temperature (ºC)
Figure 9: Maximum output power derating curves vs. ambient air tem-
perature 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
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-2HEB53P Rev. B
10/4/07
Page 7
Input:
Output:
Current:
Package:
38-55 V
53 V
7.6 A
Half-brick
Technical Specification
Figure 13: Output voltage response to step-change in load current (50%-75%-
Figure 14: Output voltage response to step-change in load current (50%-75%-
50% of Iout(max): dI/dt = 1A/ s). Load cap: 330 F, electrolytic output capaci-
50% of Iout(max); dI/dt = 0.1A/µs). Load cap: 200
µF, electrolytic output capaci-
µ
µ
tance. Top trace: Vout (500mV/div), Bottom trace: Iout (2A/div).
tance. Top trace: Vout (500mV/div), Bottom trace: Iout (2A/div).
See Fig. 18
4.7 µH
See Fig. 17
source
impedance
See Fig. 19
DC/DC
Converter
VOUT
VSOURCE
200
µ
F,
ESR
1 µF
100 µF,
ceramic
200m
Ω
<1
Ω ESR
capacitor
electrolytic
capacitor
electrolytic
capacitor
Figure 15: Output voltage response to step-change in input voltage
(1000V/ms). Load cap: 200µF, 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, i , at full rated output cur-
Figure 18: Input reflected ripple current, i , through a 4.7 µH source
s
c
rent and nominal input voltage with 4.7
µ
H source inductor and 100
µ
F
inductor at nominal input voltage and rated load current (10 mA/div).
(See Figure 16)
electrolytic capacitor (100 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:
38-55 V
53 V
7.6 A
Half-brick
Technical Specification
Figure 19: Output voltage ripple at nominal input voltage and rated
Figure 20: Load current (5A/div) as a function of time when the con-
load current (50 mV/div). Load capacitance: 1
µ
F ceramic capacitor
verter attempts to turn on into a 1 mΩ short circuit.
and 200 F tantalum capacitor. Bandwidth: 20 MHz. (See Figure 12)
µ
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
1
0.1
0.01
35 Vin
48 Vin
55 Vin
35 Vin
48 Vin
55 Vin
0.001
0.0001
10
100
1,000
Hz
10,000
100,000
100
1,000
10,000
100,000
Hz
Figure 21: Magnitude of incremental output impedance (Z
=
Figure 22: Magnitude of incremental forward transmission (FT =
v /v ) for minimum, nominal, and maximum input voltage at full
out in
rated power.
out
/i ) for minimum, nominal, and maximum input voltage at full
v
out out
rated power.
10
100
0
-10
-20
-30
-40
10
1
35 Vin
48 Vin
55 Vin
35 Vin
48 Vin
55 Vin
-50
10
0.1
10
100
1,000
Hz
10,000
100,000
100
1,000
Hz
10,000
100,000
Figure 23: Magnitude of incremental reverse transmission (RT =
/i ) for minimum, nominal, and maximum input voltage at full rated
power.
Figure 24: Magnitude of incremental input impedance (Z = v /i )
in in in
for minimum, nominal, and maximum input voltage at full rated power.
i
in out
Product # PQ55530HEB08
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-2HEB53P Rev. B
10/4/07
Page 9
Input:
Output:
Current:
Package:
38-55 V
53 V
7.6 A
Half-brick
Technical Specification
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.
BASIC OPERATION AND FEATURES
The PowerQor series converter uses a two-stage power conver-
sion topology. The first stage is a buck-converter that keeps the
output voltage constant over variations in line, load, and temper-
ature. The second stage uses a transformer to provide the func-
tions of input/output isolation and voltage step-down to achieve
the low output voltage required.
REMOTE SENSE(+) (Pins 8 and 6): The SENSE(+) inputs cor-
rect for voltage drops along the conductors that connect the con-
verter’s output pins to the load.
Both the first stage and the second stage switch at a fixed fre-
quency 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 resis-
tance, dissipate far less energy than Schottky diodes. This is the
primary reason that the PowerQor converter has such high effi-
ciency, even at very low output voltages and very high output cur-
rents.
Pin 8 should be connected to Vout(+) and Pin 6 should be con-
nected 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 out-
put voltage. If these connections are not made, the converter will
deliver an output voltage that is slightly higher than its specified
value.
The PowerQor series of half-brick and quarter-brick converters
uses the industry standard footprint and pin-out configuration.
Note: the output over-voltage protection circuit senses the voltage
across the output (pins 9 and 5) to determine when it should trig-
ger, 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.
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( )
Positive Logic
(Permanently Enabled)
Negative Logic
(Permanently Enabled)
Remote Enable Circuit
5V
ON/OFF
TTL/
CMOS
ON/OFF
_
_
Vin( )
Vin( )
Open Collector Enable Circuit
Direct Logic Drive
Figure A: Various circuits for driving the ON/OFF pin.
Product # PQ55530HEB08
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-2HEB53P Rev. B
10/4/07
Page 10
Input:
Output:
Current:
Package:
38-55 V
53 V
7.6 A
Half-brick
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.
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.
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
PROTECTION FEATURES
100%
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 appli-
cation note titled “Input System Instability”. The lockout circuitry
is a comparator with DC hysteresis. When the input voltage is ris-
ing, 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.
R
=
- 2 (k )
Ω
trim-down
( )
∆
where
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
Vnominal
– 2
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 low-
ered. When the load current is decreased below the current limit
point, the voltage will recover to the normal, regulated level.
x VDES + VNOM
(
)
1.225
R
=
(k )
Ω
trim-up
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.
Note: If the unit is held in overcurrent and the load is suddenly
reduced to zero, an output voltage overshoot can occur and pos-
sibly trip the overvoltage protection.
100,000
10,000
1,000
100
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 tog-
gled from on to off and back on again or the input power must
be removed and re-applied.
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.
10
1
0
2
4
6
8
10
12
14
16
18
20
% Increase in Vout
% 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 cir-
cuit 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 # PQ55530HEB08
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-2HEB53P Rev. B
10/4/07
Page 11
Input:
Output:
Current:
Package:
38-55 V
53 V
7.6 A
Half-brick
Technical Specification
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:
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.
• Input Under-Voltage Lockout
• Over Temperature Shutdown
• Turned off by the ON/OFF input
Figure E shows three turn-on scenarios, where a Startup Inhibit
Period is initiated at t0, t1, and t2:
Application Circuits: Figure C provides a typical circuit dia-
gram which details the input filtering and voltage trimming.
Input Filtering and External Capacitance: Figure D pro-
vides 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 elec-
trolytic input capacitor. The recommended external input capac-
itance is specified in the “Input Characteristics” section. More
detailed information is available in the application note titled
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.
“EMI Characteristics” on the SynQor website
.
If the input voltage quickly rises over UVLO at t3, the output start-
up time is 12ms.
Vout(+)
Vin(+)
Vsense(+)
Electrolytic
Capacitor
External
Input
R
trim-up
or
100µF
Vin
Trim
ON/OFF
Filter
C
R
load
trim-down
Iload
_
Vsense( )
_
_
Vin( )
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).
Product # PQ55530HEB08
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-2HEB53P Rev. B
10/4/07
Page 12
Input:
Output:
Current:
Package:
38-55 V
53 V
7.6 A
Half-brick
Technical Specification
V
in
Under-Voltage
Lockout Turn-On
Threshold
ON/OFF
(pos logic)
ON
ON
OFF
21mS
V
out
12mS
6mS
6mS
t1
t2
t3
t0
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 com-
pliant (product with lead) or 6/6 RoHS compliant. For more infor-
mation 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.
Product # PQ55530HEB08
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-2HEB53P Rev. B
10/4/07
Page 13
Input:
Output:
Current:
Package:
38-55 V
53 V
7.6 A
Half-brick
Technical Specification
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
Output Max Output
Model Number
Input Voltage
Thermal Design
Performance Level
Package Size
Voltage
53.0 V
53.0 V
Current
7.6 A
7.6 A
PQ55530HEA08xyz
PQ55530HEB08xyz
38 - 55 V
38 - 55 V
Output Voltage
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 indi-
cates 6/6 RoHS compliance.
Enable
Logic
Pin
Length
Feature
Set
K - 0.110"
N - 0.145"
R - 0.180"
Y - 0.250"
P - Positive
N - Negative
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:
Warranty
Phone:
978-849-0600
SynQor offers a three (3) year limited warranty. Complete warranty
information is listed on our website or is available upon request from
SynQor.
Toll Free: 888-567-9596
Fax:
978-849-0602
E-mail:
Web:
power@synqor.com
www.synqor.com
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.
Address: 155 Swanson Road
Boxborough, MA 01719
USA
Product # PQ55530HEB08
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-2HEB53P Rev. B
10/4/07
Page 14
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