60A/438W

Technical
Specification
PQ50073HZB60
44-52V
7.3V
60A
438W
2250V dc
Half-Brick
Input
Output
Current
Max Power
Isolation
DC-DC Converter
The PQ50073HZB60 PowerQor Zeta Half-Brick
converter is a next-generation, board-mountable,
isolated, fixed switching frequency DC/DC converter.
The Zeta series offers industry leading power density
for standard isolated DC/DC converters with both a
wide input range and a tightly regulated output.
Targeted for use in intermediate bus architectures,
this module supplies an isolated step down voltage
from 44-52V to 7.3V and provides 2,250Vdc isolation,
tolerance of output current transients up to 85A, and
more available power and higher efficiency than most
competitive bus converters. RoHS compliant (see last
page).
Protection Features
•
•
•
•
•
•
Input under-voltage lockout
Output current limit and short circuit protection
Active back bias limit
Output over-voltage protection
Protection from permanent damage and hazardous conditions
Thermal shutdown
PQ50073HZB60 Model
Operational Features
Mechanical Features
•
•
•
•
•
Industry standard half brick pin-out configuration
Standard Size Baseplated:2.40" x 2.30" (60.6 x 63.1mm)
Total height only 0.495” (12.6mm)
Baseplated Weight: 4.3oz (123g) typical
Flanged pins designed to permit surface mount soldering
(avoid wave solder) using FPiP technique
• High efficiency, 93% at full rated load current
• Delivers 438W of output power with minimal derating
• Operating input voltage range: 44-52Vdc
• Fixed frequency switching provides predictable EMI
Output voltage trim range of -50%, +10%
Control Features
• On/Off control referenced to input side
Contents
Safety Features
• UL 60950-1:2007
• CAN/CSA-C22.2 No. 60950-1:2007
• EN60950-1:A12:2011
Product # PQ50073HZB60
Phone 1-888-567-9596
Page No.
Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Standards & Qualifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Technical Figures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Applications Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
www.synqor.com
Doc.# 005-0005484 Rev. B
10/25/12
Page 1
Input: 44-52V
Output: 7.3V
Current: 60A
Package: Half-Brick
Baseplated Mechanical Diagram
2.40
[61]
1.400[35.56]
1.000[25.4]
.700[17.78]
.400[10.16]
2.30
[58.4]
.180
[4.57]
SEE NOTE 3
.495± .024
[ 12.57± 0.6 ]
OVERALL HEIGHT
9
8
7
6
5
SIDE VIEW
TOP VIEW
1.90
[48.3]
.19
[4.8]
1
M3 THREADED INSERT
4 PLACES
SEE NOTE 1
4
2
.50[12.7]
.400[10.16]
.044± .027
[ 1.12± 0.68 ]
BOTTOMSIDE
CLEARANCE
1.400
[35.56]
NOTES
PIN DESIGNATIONS
1)
M3 screws used to bolt unit’s baseplate to other surfaces (such as
a 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, and 6-8 are 0.040” (1.02mm) diameter, with 0.080”
(2.03mm) diameter standoff shoulders.
5)
Pins 5 and 9 are 0.080” (2.03 mm) diameter with 0.125” (3.18 mm)
diameter standoff shoulders.
6)
Other pin extension lengths available. Recommended pin length is
0.03” (0.76mm) greater than the PCB thickness.
7)
All Pins: Material - Copper Alloy, Finish - Matte Tin over Nickel plate
8)
Undimensioned components are shown for visual reference only.
9)
All dimensions in inches[mm] Tolerances: x.xx +/-0.02 in. (x.x +/0.5mm) x.xxx +/-0.010 in. (x.xx +/-0.25mm)
10) Baseplated Weight: 4.3oz (123g) typical
11) Workmanship: Meets or exceeds IPC-A-610C Class II
12) UL/TUV standards require a clearance greater than 0.04” (1.02mm)
between input and output for Basic insulation. This issue should
be considered if any copper traces are on the top side of the user’s
board. Note that the ferrite cores are considered part of the input/
primary circuit
Product # PQ50073HZB60
Phone 1-888-567-9596
Pin
Name
1
Vin(+)
2
ON/OFF
4
5
6
7
8
9
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 sense (see note 1)
Output voltage trim (see note 2)
Positive remote sense (see note 3)
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.# 005-0005484 Rev. B
10/25/12
Page 2
Input: 44-52V
Output: 7.3V
Current: 60A
Package: Half-Brick
Technical Specifications
PQ50073HZB60 Electrical Characteristics
Ta = 25 °C, airflow rate = 300 LFM, Vin = 48V dc unless otherwise noted; full operating temperature range is -40 °C to +100 °C baseplate 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
-1
80
V
Continuous
Operating
60
V
Continuous
Isolation Voltage
Input to Output
2250
V
Operating Temperature
-40
100
°C
Storage Temperature
-55
125
°C
Voltage at ON/OFF input pin
-2
18
V
INPUT CHARACTERISTICS
Operating Input Voltage Range
44
48
52
V
Input Under-Voltage Lockout
Turn-On Voltage Threshold
34.0
35.5
37.0
V
Turn-Off Voltage Threshold
32.5
34
35.5
V
Lockout Voltage Hysteresis
1.5
V
Maximum Input Current
20
A
100% Load, 44V Vin, trimmed up 10%
No-Load Input Current
210
mA
Disabled Input Current
50
40
mA
Input Reflected Ripple Current
225
mA
RMS thru 4.7μH inductor
Input Terminal Ripple Current
5
mA
RMS
Recommended Input Fuse
30
A
Fast acting external fuse recommended
µF
Recommended External Input Capacitance
330
Typical ESR 0.1-0.2Ω
Input Filter Component Values (L\C)
0.5\11.0
µH\µF
OUTPUT CHARACTERISTICS
Output Voltage Set Point
7.230
7.300
7.360
V
Output Voltage Regulation
Over Line
±0.20\14
%\mV
Over Load
±0.20\14
%\mV
Over Temperature
60
90
mV
Total Output Voltage Range
7.170
7.430
V
Over sample, line, load, temperature & life
Output Voltage Ripple and Noise
20MHz bandwidth; see Note 2
Peak-to-Peak
80
mV
Full load; 5mF Electrolytic capacitance
RMS
15
mV
Full load; 5mF Electrolytic capacitance
A
Operating Output Current Range
60
Subject to thermal derating
Output DC Current-Limit Inception
90
100
110
A
Output Voltage 10% Low
Output DC Current-Limit Shutdown Voltage
3.0
V
See Note 3
Back-Drive Current Limit while Enabled
24
A
Negative current drawn from output
Back-Drive Current Limit while Disabled
3
5
mA
Negative current drawn from output
Maximum Output Capacitance Electrolytic
12
mF
Nominal Vout at full load (resistive load)
EFFICIENCY
100% Load
93
%
50% Load
93
%
Note 1: For applications requiring reduced output voltage ripple and noise, consult SynQor applications support (e-mail: [email protected])
Note 2: Unit can withstand output current transients below the current limit threshold for up to 10ms. Subject to thermal derating.
Note 3: If the output voltage falls below the Output DC Current Limit Shutdown Voltage for more than 50ms, then the unit will enter into hiccup mode,
with a 500ms off-time.
Product # PQ50073HZB60
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0005484 Rev. B
10/25/12
Page 3
Input: 44-52V
Output: 7.3V
Current: 60A
Package: Half-Brick
Technical Specifications
PQ50073HZB60 Electrical Characteristics (continued)
Ta = 25 °C, airflow rate = 300 LFM, Vin = 48V dc unless otherwise noted; full operating temperature range is -40 °C to +100 °C baseplate temperature
with appropriate power derating. Specifications subject to change without notice.
Parameter
Min.
Typ.
Max.
DYNAMIC CHARACTERISTICS
Output Voltage during Load Current Transient
Step Change in Output Current (0.1A/µs)
150
Step Change in Output Current (5A/µs)
775
Settling time
3
Turn-On Transient
Turn-On Time
43
47
51
First Startup Delay
2
Output Voltage Overshoot
0
ISOLATION CHARACTERISTICS
Isolation Voltage (dielectric strength)
2250
Isolation Resistance
30
Isolation Capacitance (input to output)
1000
TEMPERATURE LIMITS FOR POWER DERATING CURVES
Semiconductor Junction Temperature
125
Board Temperature
125
Transformer Temperature
125
Baseplate Temperature
100
FEATURE CHARACTERISTICS
Switching Frequency(Isolation Stage)
125
Switching Frequency (Regulation Stage)
500
ON/OFF Control (Option P)
On-State Voltage
2.4
18
Off-State Voltage
-2.0
0.8
ON/OFF Control (Option N)
OnState Voltage
-2.0
0.8
Off-State Voltage
2.4
18
ON/OFF Control (Either Option)
Pull-Up Voltage
4.5
5.0
5.5
Pull-Up Resistance
10
Output Voltage Trim Range
-50
+10
10
Output Voltage Remote Sense Range
Output Over-Voltage Protection
8.1
8.4
8.7
Over-Temperature Shutdown OTP Trip Point
125
Over-Temperature Shutdown Restart Hysteresis
10
RELIABILITY CHARACTERISTICS
Calculated MTBF (Telcordia)
2.1
Calculated MTBF (MIL-217)
1.9
Field Demonstrated MTBF
Note 1: Higher values of isolation capacitance can be added external to the module.
Product # PQ50073HZB60
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Units Notes & Conditions
mV
mV
ms
50% to 75% to 50% Iout max, 470 μF load cap
ms
ms
%
Full load, Vout=90% nom
V
MΩ
pF
°C
°C
°C
°C
To within 1% Vout nom
Max output capacitance and full load
See Note 1
Package rated to 150°C
UL rated max operating temp 130°C
See Figure 3 for derating curve
kHz
kHz
V
V
Application notes; Figures A & B
V
kΩ
%
%
V
°C
°C
Measured across Pins 8 & 4; Figure B
Measured across Pins 8 & 4
Over Full Temperature Range
Average PCB Temperature; Auto Recovery
106 Hrs. TR-NWT-000332; 80% load, 300LFM, 40°C Ta
106 Hrs. MIL-HDBK-217F; 80% load, 300LFM, 40°C Ta
106 Hrs. See our website for details
Doc.# 005-0005484 Rev. B
10/25/12
Page 4
Input: 44-52V
Output: 7.3V
Current: 60A
Package: Half-Brick
Technical Specifications
Standards Compliance & Qualification Testing
Parameter
Notes & Conditions
STANDARDS COMPLIANCE
UL 60950-1:2007
Basic insulation
CAN/CSA-C22.2 No. 60950-1:2007
EN60950-1:A12:2011
IEC 61000-4-2
ESD test, 8 kV - NP, 15 kV air - NP (Normal Performance)
Note: 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.
Parameter
QUALIFICATION TESTING
Life Test
Vibration
Mechanical Shock
Temperature Cycling
Power/Thermal Cycling
Design Marginality
Humidity
Solderability
Product # PQ50073HZB60
# Units
32
5
5
10
5
5
5
15 pins
Phone 1-888-567-9596
Test Conditions
95% rated Vin and load, units at derating point, 1000 hours
10-55 Hz sweep, 0.060" total excursion, 1 min./sweep, 120 sweeps for 3 axis
100g minimum, 2 drops in x, y and 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, 95% RH, 1000 hours, continuous Vin applied except 5 min/day
MIL-STD-883, method 2003
www.synqor.com
Doc.# 005-0005484 Rev. B
10/25/12
Page 5
Input: 44-52V
Output: 7.3V
Current: 60A
Package: Half-Brick
Technical Figures
60
100
95
50
Power Dissipation (W)
Efficiency (%)
90
85
80
75
70
44 Vin
30
20
44 Vin
10
48 Vin
65
40
48 Vin
52 Vin
52 Vin
60
0
5
10
15
20
25
30
35
Load Current (A)
40
45
50
55
0
60
Figure 1: Efficiency at nominal output voltage vs. load current for minimum,
nominal, and maximum input voltage at 25°C.
0
5
10
15
20
25
30
35
Load Current (A)
40
45
50
55
60
Figure 2: Power dissipation at nominal output voltage vs. load current for
minimum, nominal, and maximum input voltage at 25°C.
60
50
Iout (A)
40
30
20
400
300
200
100
10
LFM (2.0
LFM (1.5
LFM (1.0
LFM (0.5
m/s)
m/s)
m/s)
m/s)
0
25
40
55
70
85
Ambient Air Temperature (°C)
Figure 3: Maximum output power derating curves vs. ambient air temperature
for airflow rates of 100 LFM through 400 LFM with air flowing from pin 4 to pin
1 (nominal input voltage).
Figure 4: Thermal plot of converter at 32.1 amp load current (234W) with 55°C
air flowing at the rate of 200 LFM. Air is flowing from pin 4 to pin 1 (nominal
input voltage).
Semiconductor junction temperature is
within 1°C of surface temperature
Figure 5: Turn-on transient at full load (resistive load) (10 ms/div). Input voltage
pre-applied. Top Trace: Vout (2V/div). Bottom Trace: ON/OFF input (5V/div)
Product # PQ50073HZB60
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Figure 6: Turn-on transient at zero load (10 ms/div). Top Trace: Vout (2V/div).
Bottom Trace: ON/OFF input (5V/div)
www.synqor.com
Doc.# 005-0005484 Rev. B
10/25/12
Page 6
Input: 44-52V
Output: 7.3V
Current: 60A
Package: Half-Brick
Technical Figures
Figure 7: Output voltage response to step-change in load current (50%75%-50% of Iout(max); dI/dt = 0.1A/μs). Load cap: 5000μF, ceramic output
capacitance. Top trace: Vout (200mV/div). Bottom trace: Iout (10A/div).
Figure 8: Output voltage response to step-change in load current (0% - 100%
of Iout(max): dI/dt = 5A/μs). Load cap: 5000μF, electrolytic output capacitance.
Top trace: Vout (200mV/div). Bottom trace: Iout (20A/div).
Figure 9: Test set-up diagram showing measurement points for Input Terminal
Ripple Current (Figure 10), Input Reflected Ripple Current (Figure 11) and
Output Voltage Ripple (Figure 12).
Figure 10: Input Terminal Ripple Current, ic, at full rated output current and
55V input voltage with 4.7μH source impedance and 330μF electrolytic capacitor
(Ch1 500mA/div). (See Figure 9).
Figure 11: Input reflected ripple current, is, through a 4.7 μH source inductor at
55V input voltage and rated load current (20 mA/div). (See Figure 9).
Figure 12: Output voltage ripple at nominal input voltage and rated load current
(200 mV/div). Load capacitance: two 1.0μF ceramic capacitors and 5000μF
electrolytic capacitor. Bandwidth: 20 MHz. (See Figure 9).
Product # PQ50073HZB60
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0005484 Rev. B
10/25/12
Page 7
Input: 44-52V
Output: 7.3V
Current: 60A
Package: Half-Brick
Technical Figures
8
7
Output Voltage (V)
6
5
4
3
2
1
48 Vin
0
0
20
40
60
80
100
120
Load Current (A)
Figure 13: Load current (20A/div) as a function of time when the converter
attempts to turn on into a 1 mΩ short circuit.
Product # PQ50073HZB60
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Figure 14: Output voltage vs. load current showing typical current limit curve
and converter shutdown point.
www.synqor.com
Doc.# 005-0005484 Rev. B
10/25/12
Page 8
Input: 44-52V
Output: 7.3V
Current: 60A
Package: Half-Brick
Applications Section
BASIC OPERATION AND FEATURES
CONTROL FEATURES
This converter series uses a two-stage power conversion
topology. The first stage keeps the output voltage constant over
variations in line, load, and temperature. The second stage uses
a transformer to provide the functions of input/output isolation
and voltage step-down to achieve the low output voltage required.
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(-).
In negative logic versions, the ON/OFF signal is active low
(meaning that a low voltage turns the converter on). In positive
logic versions, the ON/OFF input is active high (meaning that a
high voltage turns the converter on). Figure A details possible
circuits for driving the ON/OFF pin. Figure B is a detailed look of
the internal ON/OFF circuitry. See Ordering Information page for
available enable logics.
Both the first stage and the second stage switch at a fixed
frequency for predictable EMI performance. Rectification of the
transformer’s output is accomplished with synchronous rectifiers.
These devices, which are MOSFETs with a very low on-state
resistance, dissipate significantly less energy than Schottky
diodes, enabling the converter to achieve high efficiency.
Dissipation throughout the converter is so low that it does not
require a heatsink or even a baseplate for operation in many
applications; however, adding a heatsink provides improved
thermal derating performance in extreme situations. To further
withstand harsh environments and thermally demanding
applications, certain models are available totally encased. See
Ordering Information page for available thermal design options.
SynQor half-brick converters use the industry standard footprint
and pin-out.
ON/OFF
ON/OFF
ON/OFF
Vin(_)
Vin(_)
Vin(_)
Remote Enable Circuit
Negative Logic
(Permanently
Enabled)
5V
ON/OFF
REMOTE SENSE Pins 8(+) and 6(-): The SENSE(+) and
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. 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.
18V(max)
Positive Logic
(Permanently
Enabled)
5V
50k
ON/OFF
10k
TTL
TTL/
CMOS
Vin(_)
Vin(_)
Vin(_)
Open Collector Enable Circuit
ON/OFF
Direct Logic Drive
Figure B: Internal ON/OFF Pin Circuitry.
Figure A: Various Circuits for Driving the ON/OFF Pin.
Product # PQ50073HZB60
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0005484 Rev. B
10/25/12
Page 9
Input: 44-52V
Output: 7.3V
Current: 60A
Package: Half-Brick
Applications Section
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. SynQor uses
industry standard trim equations.
To decrease the output voltage, the user should connect a resistor
between Pin 7 (TRIM) and Pin 6 (SENSE(–) input). For a desired
decrease of the nominal output voltage, the value of the resistor
should be:
Rtrim-down =
(
where
Δ% =
100%
–2
Δ%
|
) kΩ
Vnominal – Vdesired
Vnominal
| × 100%
To increase the output voltage, the user should connect a resistor
between Pin 7 (TRIM) and Pin 8 (SENSE(+) input). For a desired
increase of the nominal output voltage, the value of the resistor
should be:
(
Rtrim-up =
)
Vnominal
– 2 × Vdesired + Vnominal
1.225
Vdesired – Vnominal
kΩ
The Trim Graph in Figure C shows 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.
10,000.0
Trim Resistance (kOhms)
1,000.0
100.0
10.0
1.0
0.1
0.0
0
5
10
15
20
25
% Increase in Vout
30
35
40
45
50
% Decrease in Vout
Figure C: Trim Graph.
Note: The TRIM feature does not affect the voltage at which the
output over-voltage protection circuit is triggered. Trimming the
output voltage too high may cause the over-voltage protection
circuit to engage, particularly during transients.
It is not necessary for the user to add capacitance at the TRIM pin.
The node is internally filtered to eliminate noise.
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.
Product # PQ50073HZB60
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Protection Features
Input Under-Voltage Lockout: The converter is designed to
turn off when the input voltage is too low, helping to avoid an
input system instability problem, which is described in more detail
in the application note titled “Input System Instability” on the
SynQor website. The lockout circuitry is a comparator with DC
hysteresis. When the input voltage is rising, it must exceed the
typical “Turn-On Voltage Threshold” value* before the converter
will turn on. Once the converter is on, the input voltage must
fall below the typical Turn-Off Voltage Threshold value before the
converter will turn off.
Output Current Limit: If the output current exceeds the “Output
DC Current Limit Inception” point*, then a fast linear current limit
controller will reduce the output voltage to maintain a constant
output current. If as a result, the output voltage falls below the
“Output DC Current Limit Shutdown Voltage”* for more than 50ms,
then the unit will enter into hiccup mode, with a 500ms off-time.
The unit will then automatically attempt to restart.
Back-Drive Current Limit: If there is negative output current
of a magnitude larger than the “Back-Drive Current Limit while
Enabled” specification*, then a fast back-drive limit controller will
increase the output voltage to maintain a constant output current.
If this results in the output voltage exceeding the “Output OverVoltage Protection” threshold*, then the unit will shut down.
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
500ms the converter will automatically restart for all but the S
Feature Set option, which is latching and will not restart until input
power is cycled or the ON/OFF input is toggled.
Over-Temperature Shutdown: A temperature sensor on the
converter senses the average temperature of the module. The
thermal shutdown circuit is designed to turn the converter off
when the temperature at the sensed location reaches the “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*.
Startup Inhibit Period: The Startup Inhibit Period ensures that
the converter will remain off for approximately 500ms when it is
shut down due to a fault. This generates a 2 Hz “hiccup mode,”
which prevents the converter from overheating. In all, there
are three ways that the converter can be shut down, initiating a
Startup Inhibit Period:
• Output Over-Voltage Protection
• Current Limit
• Short Circuit Protection
* See Electrical Characteristics section.
www.synqor.com
Doc.# 005-0005484 Rev. B
10/25/12
Page 10
Input: 44-52V
Output: 7.3V
Current: 60A
Package: Half-Brick
Applications Section
APPLICATION CONSIDERATIONS
Thermal Considerations: For baseplated and encased versions,
the max operating baseplate temperature, TB, is 100ºC. Refer to
the Thermal Derating Curves in the Technical Figures section to
see the available output current at baseplate temperatures below
100ºC.
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.
A power derating curve can be calculated for any heatsink that is
attached to the base-plate of the converter. It is only necessary to
determine the thermal resistance, RTHBA, of the chosen heatsink
between the baseplate and the ambient air for a given airflow rate.
This information is usually available from the heatsink vendor. The
following formula can the be used to determine the maximum
power the converter can dissipate for a given thermal condition if
its base-plate is to be no higher than 100ºC.
Application Circuits: A typical circuit diagram, Figure D below
details the input filtering and voltage trimming.
Input Filtering and External Input Capacitance: Figure
E below shows the internal input filter components. This filter
dramatically reduces input terminal ripple current, which otherwise
could exceed the rating of an external electrolytic input capacitor.
The recommended external input capacitance is specified in the
Input Characteristics section of the Electrical Specifications. More
detailed information is available in the application note titled “EMI
Characteristics” on the SynQor website.
Pdiss
max
For convenience, Thermal Derating Curves are provided in the
Technical Figures section.
Vin(+)
Vin
100ºC - TA
RTHBA
This value of maximum power dissipation can then be used in
conjunction with the data shown in the Power Dissipation Curves
in the Technical Figures section to determine the maximum load
current (and power) that the converter can deliver in the given
thermal condition.
Output Filtering and External Output Capacitance: The
internal output filter components are shown in Figure E below. This
filter dramatically reduces output voltage ripple. Some minimum
external output capacitance is required, as specified in the Output
Characteristics area of the Electrical Characteristics section. No
damage will occur without this capacitor connected, but peak
output voltage ripple will be much higher.
Vout(+)
Vsense(+)
Electrolytic
Capacitor
External
Input
Filter
=
ON/OFF
Trim
Vsense(_)
Vin(_)
Rtrim-up
or
Rtrim-down
Cload
Iload
Vout(_)
Figure D: Typical Application Circuit (negative logic unit, permanently enabled).
Lin
Vin(+)
Vout(+)
C1
C2
Regulation
Stage
Current
Sense
Isolation
Stage
Vin(_)
Vout(-)
Figure E: Internal Input and Output Filter Diagram (component values listed in Electrical Characteristics section).
Product # PQ50073HZB60
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0005484 Rev. B
10/25/12
Page 11
Technical
Specification
PQ50073HZB60
Ordering Information
Part Numbering System
Ordering Information
The part numbering system for SynQor’s 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 characters for options.
Add “-G” to the model number for 6/6 RoHS compliance.
PQ 5 0 0 7 3 H Z B 6 0 N N S - G
6/6 RoHS
Options
(see
Ordering Information)
Model Number
Input Voltage
PQ50073HZB60NNS-G
44-52V
Output
Voltage
7.3V
Max Output
Current
60A
Output Current
Thermal Design
The following options must be included in place of the w x y z spaces in the
model numbers listed above.
Performance Level
Options Description: w x y z
Thermal Design
Enable Logic Pin Style
Package Size
Output Voltage
B - Threaded Baseplated
Input Voltage
N - Negative
N - 0.145"
Feature Set
S - Standard
Product Family
The first 12 characters comprise the base part number and the last 3
characters indicate available options. The “-G” suffix indicates 6/6 RoHS
compliance.
Not all combinations make valid part numbers, please contact SynQor for
availability. See the Product Summary web page for more options.
Application Notes
A variety of application notes and technical white papers can be downloaded
in pdf format from our website.
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 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]
PATENTS
SynQor holds the following U.S. patents, one or more of which apply to
each product listed in this document. Additional patent applications may
be pending or filed in the future.
Contact SynQor for further information:
Phone:
Toll Free:
Fax:
E-mail:
Web:
Address:
Product # PQ50073HZB60
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
5,999,417
6,222,742
6,545,890
6,577,109
6,594,159
6,731,520
6,894,468
6,896,526
6,927,987
7,050,309
7,072,190
7,085,146
7,119,524
7,269,034
7,272,021
7,272,023
7,558,083
7,564,702
7,765,687
7,787,261
8,023,290
8,149,597
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.
www.synqor.com
Doc.# 005-0005484 Rev. B
10/25/12
Page 12
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