40A/200W

Technical
Specification
PQ24050QEx40
18-36 V
50V
5V
200W
2250V dc
Quarter-brick
Input
Transient Input
Output
Max Power
Isolation
DC-DC Converter
The PQ24050QEx40 PowerQor Exa Quarter-brick
converter is a next-generation, board-mountable,
isolated, fixed switching frequency DC-DC converter.
The Exa series offers industry leading power density
for standard isolated DC-DC converters with both a
wide input range and a tightly regulated output. This
module supplies an isolated step down voltage from
18-36 V to 5V and provides more available power and
higher efficiency than competitive converters. RoHS
Compliant (see last page).
Protection Features
•
•
•
•
•
•
•
•
Input under-voltage lockout disables converter at low Vin conditions
Output current limit
Short circuit protection
Protection from permanent damage and hazardous conditions
Active back bias limit
Smooth startup with external load induced pre-bias
Auto-recovery output OVP protects load from damaging voltages
Thermal shutdown protects converter from abnormal conditions
Mechanical Features
•
•
•
•
Industry standard quarter-brick pin-out
Open frame Size: 1.45" x 2.30" x 0.445" (36.8 x 58.4 x 11.3mm)
Open frame weight: 1.5 oz (43 g)
Flanged pins designed to permit surface mount soldering,
avoid wave solder using FPiP technique on open frame units
PQ24050QEx40 Model
Operational Features
•
•
•
•
•
•
•
High efficiency, 94% at half rated load current
Delivers 40A full power with minimal derating - no heatsink required
Operating input voltage range: 18-36 V
Input voltage transient capability: 50V, 1,000ms
Fixed frequency switching provides predictable EMI
No minimum load requirement
Wide output voltage Trim range (-50% to +10%), see trim section
Control Features
• On/Off control referenced to input side
• Positive and negative logic options are available
Page No.
Safety Features
• UL 60950-1/R2011-12
• EN60950-1/A2:2013
• CAN/CSA-C22.2 No. 60950-1/A1:2011
Product # PQ24050QEx40
Contents
Phone 1-888-567-9596
Mechanical Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Standards & Qualifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Technical Figures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Applications Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
www.synqor.com
Doc.# 005-0006368 Rev. A
08/11/14
Page 1
Input: 18-36 V
Output: 5V
Current: 40A
Package: Quarter-brick
Open Frame Mechanical Diagram
.600[15.24]
.450[11.43]
.300[7.62]
.150[3.81]
.180
[4.57]
4
5
6
7
8
2.300
[58.42]
1.450
[36.83]
.445 ±.013
[11.3 ±0.338]
Overall Height
.058±.013
[1.47±0.33 ]
Bottomside
Clearance
3
2
1
.425 ± .020
[10.8± 0.5]
.300[7.62]
.600[15.24]
NOTES
PIN DESIGNATIONS
1)PINS 1-3, 5-7 ARE 0.040” (1.02mm) DIA. WITH
0.080” (2.03mm) DIA. STANDOFF SHOULDERS
2)PINS 4 AND 8 ARE 0.062” (1.57mm) DIA. WITH
0.100” (2.54mm) DIA. STANDOFF SHOULDERS
Pin
Label
1
Vin(+)
Function
Positive input
TTL input to turn converter on and off,
2
ON/OFF
referenced to Vin(-), with internal pull up
3
Vin(-)
Negative input voltage
4
Vout(-) Negative output voltage
5 SENSE (-) Negative remote sense. See note 1
6
TRIM
Output voltage trim. See note 2
7 SENSE (+) Positive remote sense. See note 3
8
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)ALL PINS: MATERIAL: COPPER ALLOY
FINISH: MATTE TIN OVER NICKEL PLATE
4)UNDIMENSIONED COMPONENTS ARE SHOWN
FOR VISUAL REFERENCE ONLY
5)ALL DIMENSIONS IN INCHES(mm)
6)TOLERANCES: X.XXIN +/-0.02 (X.Xmm +/-0.5mm)
X.XXXIN +/-0.010 (X.XXmm +/-0.25mm)
7)WEIGHT: 1.5 oz (43 g) TYPICAL
8)WORKMANSHIP: MEETS OR EXCEEDS IPC-A-610 CLASS II
3)SENSE(+) should be connected to Vout(+) either remotely or
at the converter.
Product # PQ24050QEx40
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Doc.# 005-0006368 Rev. A
08/11/14
Page 2
Input: 18-36 V
Output: 5V
Current: 40A
Package: Quarter-brick
Baseplated Mechanical Diagram
SEATING
PLANE
HEIGHT
0.544 0.025
[ 13.82 0.63 ]
1.510 [38.35]
1.030 [26.16]
PIN
EXTENSION
0.180
[4.57]
0.450 [11.43]
0.150 [3.81]
4
5
6
7
8
TOP VIEW
1.860
[47.24]
0.004 [0.10]
2.000
[50.80]
2.340
[59.44]
0.08
[2.0]
1
0.215 0.020
[5.46 0.50]
BOTTOMSIDE
CLEARANCE
0.058 0.013
[ 1.47 0.33 ]
THREADED INSERT
SEE NOTE 1
(4 PLCS)
1)APPLIED TORQUE PER M3 SCREW 4in-lb RECOMMENDED
(5in-lb LIMIT) SCREW SHOULD NOT EXCEED 0.100” (2.54mm)
DEPTH BELOW THE SURFACE OF THE BASEPLATE.
2)BASEPLATE FLATNESS TOLERANCE IS 0.004” (.10mm)
TIR FOR SURFACE.
3)PINS 1-3, 5-7 ARE 0.040” (1.02mm) DIA. WITH 0.080” (2.03mm)
DIA. STANDOFFS.
4)PINS 4 AND 8 ARE 0.080” (2.03mm) DIA. WITH 0.125” (3.18mm)
DIA. STANDOFFS.
5)ALL PINS: MATERIAL: COPPER ALLOY
FINISH: MATTE TIN OVER NICKEL PLATE
6)WEIGHT: 3.0 oz (85 g) TYPICAL
7)ALL DIMENSIONS IN INCHES(mm)
TOLERANCES: X.XXIN +/-0.02 (X.Xmm +/-0.5mm)
X.XXXIN +/-0.010 (X.XXmm +/-0.25mm)
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2
1
0.300 [7.62]
0.600 [15.24]
NOTES
Product # PQ24050QEx40
3
www.synqor.com
PIN DESIGNATIONS
Pin
Label
1
Vin(+)
Function
Positive input
TTL input to turn converter on and off,
2
ON/OFF
referenced to Vin(-), with internal pull up
3
Vin(-) Negative input voltage
4
Vout(-) Negative output voltage
5 SENSE (-) Negative remote sense. See note 1
6
TRIM
Output voltage trim. See note 2
SENSE
7
Positive remote sense. See note 3
(+)
8
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.
Doc.# 005-0006368 Rev. A
08/11/14
Page 3
Input: 18-36 V
Output: 5V
Current: 40A
Package: Quarter-brick
Technical Specifications
PQ24050QEx40 Electrical Characteristics
Ta = 25 °C, airflow rate = 300 LFM, Vin = 24V dc 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.
ABSOLUTE MAXIMUM RATINGS
Input Voltage
Non-Operating
Operating
Operating Transient Protection
Insulation 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
Response to Input Transient
Input Reflected Ripple Current
Input Terminal Ripple Current
Recommended Input Fuse
Recommended External Input Capacitance
Input Filter Component Values (C1\Lin\C2)
OUTPUT CHARACTERISTICS
Output Voltage Set Point
Output Voltage Regulation
Over Line
Over Load
Over Temperature
Total Output Voltage Range
Output Voltage Ripple and Noise
Peak-to-Peak
RMS
Operating Output Current Range
Output DC Current-Limit Inception
Output DC Current-Limit Shutdown Voltage
Back-Drive Current Limit while Enabled
Back-Drive Current Limit while Disabled
Maximum Output Capacitance Electrolytic
EFFICIENCY
100% Load
50% Load
Product # PQ24050QEx40
Typ.
Max.
-1
-40
-45
-2
Units Notes & Conditions
50
40
50
V
V
V
2250
100
125
9
V dc
°C
°C
V
18
24
36
V
16.2
14.7
17.0
15.5
1.5
17.9
16.3
V
V
V
A
mA
mA
V
mA
mA
A
µF
185
4
0.68
6
200
16
230
6
30
220
0.1\0.22\28.3
4.950
5.050
V
±0.25
±0.25
±0.35
±0.35
75
5.125
%
%
mV
V
85
18
0
44.0
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50.0
5
10
3
40
56.0
92
94
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4
12
100% Load, 18V Vin, Trimmed up 10%
0.25V/μs input transient
RMS thru 4.7μH inductor
RMS
Fast acting external fuse recommended
Typical ESR 0.1-0.2Ω; Figure 13
µF\µH\µF Internal values; see Figure D
5.000
-75
4.875
Continuous
Continuous
1 s transient, square wave
mV
mV
A
A
V
A
mA
mF
%
%
See Note 1
See Note 1
Over sample, line, load, temperature & life
20MHz bandwidth; see Note 2
100% Load
100% Load
Subject to thermal derating
Output Voltage 10% Low
Negative current drawn from output
Negative current drawn from output
Nominal Vout at 100% load (resistive load)
Figures 1 - 2
Figures 1 - 2
Doc.# 005-0006368 Rev. A
08/11/14
Page 4
Input: 18-36 V
Output: 5V
Current: 40A
Package: Quarter-brick
Technical Specifications
PQ24050QEx40 Electrical Characteristics (continued)
Ta = 25 °C, airflow rate = 300 LFM, Vin = 24V dc 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
DYNAMIC CHARACTERISTICS
Output Voltage during Load Current Transient
Step Change in Output Current (0.1A/µs)
150
mV
50% to 75% to 50% Iout max
Step Change in Output Current (5A/µs)
200
mV
50% to 75% to 50% Iout max
Settling time
0.4
ms
To within 1% Vout nom
Turn-On Transient
Turn-On Time
35
ms
Full load, Vout=90% nom; Figures 9 & 10
Output Voltage Overshoot
2
%
Maximum Output Capacitance
ISOLATION CHARACTERISTICS
Isolation Voltage (dielectric strength)
2250
V
See Absolute Maximum Ratings
Isolation Resistance
30
MΩ
Isolation Capacitance (input to output)
1000
pF
See Note 3
TEMPERATURE LIMITS FOR POWER DERATING CURVES
Semiconductor Junction Temperature
125
°C
Package rated to 150°C
Board Temperature
125
°C
UL rated max operating temp 130°C
Transformer Temperature
125
°C
FEATURE CHARACTERISTICS
Switching Frequency Regulation Stage
230
240
250
kHz
Switching Frequency Isolation Stage
115
120
125
kHz
ON/OFF Control (Option P)
Off-State Voltage
-2.0
0.8
V
On-State Voltage
2.4
9.0
ON/OFF Control (Option N)
Off-State Voltage
2.4
9.0
V
On-State Voltage
-2.0
0.8
ON/OFF Control (Either Option)
Application notes; Figure A
Pull-Up Voltage
4.75
5.00
5.25
V
Pull-Up Resistance
20
kΩ
Output Voltage Trim Range
-50
10
%
Measured across Pins 8 & 4; Figure B
Output Over-Voltage Protection
113
118
123
%
Over Full Temperature Range; % of nominial Vout
Over-Temperature Shutdown
120
°C
Average PCB Temperature
Over-Temperature Shutdown Restart Hysteresis
10
°C
RELIABILITY CHARACTERISTICS
Calculated MTBF (Telcordia) SR-332, Issue 2
3.5
106 Hrs. TR-NWT-000332; 80% load, 300LFM, 40°C Ta
Calculated MTBF (MIL-217) MIL-HDBK-217F
2.7
106 Hrs. MIL-HDBK-217F; 80% load, 300LFM, 40°C Ta
Field Demonstrated MTBF
106 Hrs. See our website for details
Note 1: Line and load regulation is limited by duty cycle quantization and does not indicate a shift in the internal voltage reference.
Note 2: For applications requiring reduced output voltage ripple and noise, consult SynQor applications support (e-mail: [email protected])
Note 3: Higher values of isolation capacitance can be added external to the module.
Product # PQ24050QEx40
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0006368 Rev. A
08/11/14
Page 5
Input: 18-36 V
Output: 5V
Current: 40A
Package: Quarter-brick
Technical Specifications
Standards Compliance & Qualification Testing
Parameter
Notes & Conditions
STANDARDS COMPLIANCE
UL 60950-1/R2011-12
Basic insulation
EN60950-1/A2:2013
CAN/CSA-C22.2 No. 60950-1/A1:2011
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 # PQ24050QEx40
# Units
32
5
5
10
5
5
5
15 pins
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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
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Doc.# 005-0006368 Rev. A
08/11/14
Page 6
Input: 18-36 V
Output: 5V
Current: 40A
Package: Quarter-brick
Technical Figures
100
95
95
90
90
85
85
Efficiency (%)
Efficiency (%)
100
80
75
70
60
75
25º C
70
18Vin
24 Vin
65
80
40º C
55º C
65
36 Vin
60
0
5
10
15
20
25
30
35
40
100
200
300
Air Flow (LFM)
Load Current (A)
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).
25
20
20
Power Dissipation (W)
Power Dissipation (W)
25
15
10
5
18Vin
15
10
25º C
5
40º C
24 Vin
55º C
36 Vin
0
0
5
10
15
20
25
400
30
35
0
40
100
200
300
400
Air Flow (LFM)
Load Current (A)
Figure 3: Power Dissipation at nominal output voltage vs. load current for
minimum, nominal, and maximum input voltage at 25°C.
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).
45
40
35
30
Iout (A)
25
20
15
400 LFM (2.0 m/s)
10
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
5
0
100 LFM (0.5 m/s)
25
40
55
70
Semiconductor junction temperature is
within 1°C of surface temperature
85
Ambient Air Temperature (°C)
Figure 5: Thermal Derating (max output current vs. ambient air temperature)
for airflow rates of 100 LFM through 400 LFM with air flowing from pin 3 to pin
1 (nominal input voltage).
Product # PQ24050QEx40
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Figure 6: Thermal Image of converter at 34.0 amp load current (170W) with
55°C air flowing at the rate of 200 LFM. Air is flowing from pin 3 to pin 1
(nominal input voltage).
www.synqor.com
Doc.# 005-0006368 Rev. A
08/11/14
Page 7
Input: 18-36 V
Output: 5V
Current: 40A
Package: Quarter-brick
Technical Figures
40
Iout (A)
30
20
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
10
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
0
25
40
55
70
85
Ambient Air Temperature (ºC)
Figure 7: Thermal Derating (max output current vs. ambient air temperature)
for airflow rates of 100 LFM through 400 LFM with air flowing lenghtwise from
output to input (nominal input voltage).
Figure 8: Thermal Image of converter at 32.7 amp load current (164W) with
55°C air flowing at the rate of 200 LFM. Air is flowing across the converter
from output to input (nominal input voltage).
Figure 9: 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)
Figure 10: Turn-on Transient at zero load (10 ms/div). Top Trace: Vout (2V/
div). Bottom Trace: ON/OFF input (5V/div)
Figure 11: Output Voltage Response to Step-Change in Load Current (50%75%-50% of Iout(max); dI/dt = 0.1A/µs). Load cap: 100µF electrolytic output
capacitance. Top trace: Vout (200mV/div). Bottom trace: Iout (20A/div).
Figure 12: Output Voltage Response to Step-Change in Load Current (50%75%-50% of Iout(max): dI/dt = 5A/µs). Load cap: 330µF electrolytic output
capacitance. Top trace: Vout (200mV/div). Bottom trace: Iout (20A/div).
Product # PQ24050QEx40
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Doc.# 005-0006368 Rev. A
08/11/14
Page 8
Input: 18-36 V
Output: 5V
Current: 40A
Package: Quarter-brick
Technical Figures
Input
Reflected
Ripple
Current
source
impedance
iS
VSOURCE
Input
Terminal
Ripple
Current
iC
Output
Voltage
Ripple
DC-DC
Converter
electrolytic
capacitor
VOUT
ceramic
capacitor
tantalum
capacitor
Figure 13: Test Set-up Diagram showing measurement points for Input Terminal
Ripple Current (Figure 14), Input Reflected Ripple Current (Figure 15) and
Output Voltage Ripple (Figure 16).
Figure 14: Input Terminal Ripple Current, ic, at full rated output current and
nominal input voltage with 4.7µH source impedance and 220µF electrolytic
capacitor (Ch.1 500mA/div). (See Figure 13).
Figure 15: Input Reflected Ripple Current, is, through a 4.7 µH source inductor
at nominal input voltage and rated load current (10 mA/div). (See Figure 13).
Figure 16: Output Ripple at nominal input voltage and rated load current
(50 mV/div). Load capacitance: one 1.0µF ceramic capacitor and one 100µF
electrolytic capacitor. Bandwidth: 20 MHz. (See Figure 13).
8
7
Output Voltage (V)
6
5
4
3
18Vin
2
24 Vin
1
36 Vin
0
0
10
20
30
40
Load Current (A)
50
60
Figure 17: Output I-V Characteristics (output voltage vs load current) showing
typical current limit curves and converter shutdown points.
Product # PQ24050QEx40
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Figure 18: Output Short Load Current (50A/div) as a function of time when the
converter attempts to turn on into a 1 mΩ short circuit. Top trace (200ms/div) is
an expansion of the on-time portion of the bottom trace.
www.synqor.com
Doc.# 005-0006368 Rev. A
08/11/14
Page 9
Input: 18-36 V
Output: 5V
Current: 40A
Package: Quarter-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 stepdown 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(-).
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 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
baseplated or totally encased. See Ordering Information page for
available thermal design options.
SynQor quarter-brick converters use the industry standard footprint
and pin-out.
ON/OFF
Vin(_)
Vin(_)
Remote Enable Circuit
ON/OFF
ON/OFF
Negative Logic
(Permanently
Enabled)
5V
ON/OFF
TTL/
CMOS
Vin(_)
Open Collector Enable Circuit
REMOTE SENSE Pins 7(+) and 5(-): The SENSE(+) and
SENSE(-) inputs correct for voltage drops along the conductors that
connect the converter’s output pins to the load.
Pin 7 should connect to Vout(+) and Pin 5 should connect 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 8 and 4) to determine when it should trigger,
not the voltage across the converter’s sense leads (pins 7 and 5).
Therefore, the resistive drop on the board should be small enough
so that output OVP does not trigger, even during load transients.
OUTPUT VOLTAGE TRIM (Pin 6): The TRIM input permits the
user to adjust the output voltage across the sense leads up or down
according to the trim range specifications. SynQor uses industry
standard trim equations.
To decrease the output voltage, the user should connect a resistor
between Pin 6 (TRIM) and Pin 5 (SENSE(-) input). For a desired
decrease of the nominal output voltage, the value of the resistor
should be:
Positive Logic
(Permanently
Enabled)
Rtrim-down =
where
ON/OFF
Vin(_)
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). Fig A details possible circuits for driving the ON/
OFF pin. See Ordering Information page for available enable logics.
Direct Logic Drive
(
511%
– 10.22
Δ%
) kΩ
Vnominal – Vdesired
× 100%
Vnominal
To increase the output voltage, the user should connect a resistor
between Pin 6 (TRIM) and Pin 7 (SENSE(+) input). For a desired
increase of the nominal output voltage, the value of the resistor
should be:
Δ% =
Rtrim-up = 5.11
Figure A: Various Circuits for Driving the ON/OFF Pin.
[
|
(
|
Vnominal
1.225
–2
) × Vdesired + Vnominal
Vdesired – Vnominal
]
kΩ
The Trim Graph in Figure B 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.
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.
Product # PQ24050QEx40
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www.synqor.com
Doc.# 005-0006368 Rev. A
08/11/14
Page 10
Input: 18-36 V
Output: 5V
Current: 40A
Package: Quarter-brick
Applications Section
It is not necessary for the user to add capacitance at the TRIM pin.
The node is internally filtered to eliminate noise.
100,000.0
Trim Resistance (kOhms)
10,000.0
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.
1,000.0
100.0
10.0
1.0
0.1
0.0
0
5
10
15
20
25
% increase Vout
30
35
40
45
50
% decrease Vout
Figure B: Trim Graph.
PROTECTION FEATURES
Input Under-Voltage Lockout (UVLO): 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. When the input is rising, it must exceed the
typical “Turn-On Voltage Threshold”* before the converter will turn
on. Once the converter is on, the input must fall below the typical
"Turn-Off Voltage Threshold"* before the converter will turn off.
Output Current Limit (OCP): If the output current exceeds
the “Output DC Current Limit Inception” value*, 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 50 ms, then the unit will enter into hiccup mode, with a 500
ms 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 (OVP): 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 500 ms 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.
During an output over-voltage condition, the converter's LED will
illuminate. For units with latching OVP (S Feature Set), once the
over-voltage condition has been removed the LED will flash steadily
until the input power or the ON/OFF input is toggled.
Over-Temperature Shutdown (OTP): A thermister 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”*.
Startup Inhibit Period: The Startup Inhibit Period ensures that
the converter will remain off for approximately 500 ms when it is
shut down due to a fault. This generates a 2 Hz “hiccup mode,”
preventing the converter from overheating. There are multiple ways
the converter can be shut down, initiating a Startup Inhibit Period:
•
•
•
•
Output Over-Voltage Protection
Current Limit
Short Circuit Protection
Disabling via ON/OFF input (excluding PQ60120QE & PQ60120QZ)
* See Electrical Characteristics section.
Product # PQ24050QEx40
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0006368 Rev. A
08/11/14
Page 11
Input: 18-36 V
Output: 5V
Current: 40A
Package: Quarter-brick
Applications Section
APPLICATION CONSIDERATIONS
Input System Instability: This condition can occur because any
DC-DC converter appears incrementally as a negative resistance
load. A detailed application note titled “Input System Instability” is
available on the SynQor website which provides an understanding
of why this instability arises, and shows the preferred solution for
correcting it.
Application Circuits: A typical circuit diagram, Figure C below
details the input filtering and voltage trimming.
Input Filtering and External Input Capacitance: Figure
D 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.
Output Filtering and External Output Capacitance: The
internal output filter components are shown in Figure D 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.
Thermal Considerations: For baseplated and encased versions,
the max operating baseplate temperature, TB, is 100 ºC. Refer to
the Thermal Derating Curves in the Technical Figures section to
see the available output current at baseplate temperatures below
100 ºC.
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 100 ºC.
Pdiss
max
Vin
100 ºC - 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.
For convenience, Thermal Derating Curves are provided in the
Technical Figures section.
Vin(+)
Vout(+)
Vsense(+)
Electrolytic
Capacitor
External
Input
Filter
=
ON/OFF
Trim
Vsense(_)
Vin(_)
Rtrim-up
or
Rtrim-down
Cload
Iload
Vout(_)
Figure C: Typical Application Circuit (negative logic unit, permanently enabled).
Lin
Vin(+)
Vout(+)
C1
C2
Regulation
Stage
Current
Sense
Isolation
Stage
Vin(_)
Vout(-)
Figure D: Internal Input and Output Filter Diagram (component values listed
in Electrical Characteristics section).
Product # PQ24050QEx40
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0006368 Rev. A
08/11/14
Page 12
Technical
Specification
PQ24050QEx40
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 2 4 0 5 0 Q E B 4 0 N R A - G
6/6 RoHS
Options
(see
Ordering Information)
Model Number
Input Voltage
PQ24050QEw40xyz-G
18-36 V
Output
Voltage
5V
Max Output
Current
40A
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
A - Open Frame
B - Baseplated
Input Voltage
N - Negative
P - Positive
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.
K - 0.110"
N - 0.145"
R - 0.180"
Y - 0.250"
Feature Set
A - Standard
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 and to order:
Phone:
Toll Free:
Fax:
E-mail:
Web:
Address:
Product # PQ24050QEx40
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
8,493,751
8,644,027
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.# 005-0006368 Rev. A
08/11/14
Page 13
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