5.6A/100W

Technical
Specification
PQ65180QGx06
40V – 75V
100V
18V
100W
2000V dc
Quarter-brick
Input
Transient Input
Output
Max Power
Isolation
DC-DC Converter
The PQ65180QGA06 PowerQor Giga quarterbrick
converter is a next-generation, board-mountable,
isolated, fixed switching frequency DC-DC converter
that uses synchronous rectification to achieve extremely
high conversion efficiency. The power dissipated by
the converter is so low that a heatsink is not required,
which saves cost, weight, height, and application
effort. All of the power and control components are
mounted to the multi-layer PCB substrate with highyield surface mount technology. Since the PowerQor
converter has no explicit thermal interfaces, it is
extremely reliable. RoHS Compliant (see last page)."
Protection Features
• Input under-voltage lockout disables converter at low Vin conditions
• Output current limit & short circuit protection safeguards converter
& load from permanet damage and consequent hazardous conditions
• Active back bias limit prevents damage to converter from
external load induced pre-bias
• Output OVP protects load from damaging voltages
• Thermal shutdown protects converter from abnormal conditions
PQ65180QGx06 Model
Operational Features
• High efficiency, 91% at full rated load current
• Delivers 100W with minimal derating - no heatsink required
• Wide input voltage range: 40V – 75V with
100V, 100ms input voltage transient capability
• Fixed frequency switching provides predictable EMI
• No minimum load requirement or preload resistors required
Mechanical Features
•
•
•
•
Industry standard pin-out configuration
Standard Size:2.30"x1.45"x0.397" (58.4x36.8x10.08mm)
Weight: 1.2 oz. (34 grams)
Flanged pins designed to permit surface mount soldering,
avoid wave solder using FPiP technique on open frame units
Control Features
• On/Off control referenced to input side
• Positive and negative logic options are available
• Remote sense on Vout compensates for output distribution drops
Page No.
Safety Features
• UL 60950-1:R2011-12
• EN60950-1/A12:2011
• CAN/CSA-C22.2 No. 60950-1/A1:2011
Product # PQ65180QGx06
Contents
Phone 1-888-567-9596
Mechanical Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Standards & Qualifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Technical Figures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Applications Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
www.synqor.com
Doc.# 005-2Q581D Rev. C
01/16/14
Page 1
Input: 40V – 75V
Output: 18V
Current: 5.6A
Package: Quarter-brick
Open Frame Mechanical Diagram
TOP VIEW
1.45 [36.8]
.600 [15.24]
.450 [11.43]
.300 [7.62]
.150 [3.81]
SIDE VIEW
.031 ± .027
[0.79 ± 0.68]
Bottomside
Clearance
8 7 6 5 4
2.30
[58.9]
2.00
[50.8]
1
2
.180
[4.57]
See Note 6
.397 ± .015
[10.08 ± 0.38]
Overall Height
3
.14 [3.6]
.43 [10.8]
.300 [7.62]
.600 [15.24]
NOTES
1)
2)
3)
4)
5)
6)
Pins 1-3, 5-7 are 0.040” (1.02mm) diameter, with 0.080” (2.03mm)
diameter standoff shoulders.
Pins 4 and 8 are 0.062” (1.57 mm) diameter with 0.100” (2.54 mm)
diameter standoff shoulders.
Other pin extension lengths available.
All Pins: Material - Copper Alloy- Finish - Matte Tin over Nickel plate
Undimensioned components are shown for visual reference only.
Weight: 1.2 oz. (34 grams)
All dimensions in inches (mm)
Tolerances: x.xx in +/-0.02 in. (x.xmm +/-0.5 mm)
x.xxx in +/-0.010 in. (x.xxmm +/-0.25 mm)
Product # PQ65180QGx06
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PIN DESIGNATIONS
Pin
Name
Function
1
Vin(+)
2
ON/OFF
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
3
Vin(–)
4
Vout(-)
5
SENSE(–)
6
TRIM
7
SENSE(+)
8
Vout(+)
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.# 005-2Q581D Rev. C
01/16/14
Page 2
Input: 40V – 75V
Output: 18V
Current: 5.6A
Package: Quarter-brick
Baseplated Mechanical Diagram
TOP VIEW
SIDE VIEW
1.47 [37.3]
1.03 [26.2]
.600 [15.24]
.450 [11.43]
.300 [7.62]
.150 [3.81]
.22 [5.6]
.031 ± .027
[0.79 ± 0.68]
Bottomside
Clearance
.23 [5.8]
8 7 6 5 4
2.32
[58.9]
2.002 1.86
[50.8] [47.2]
M3 Threaded Inserts
4 Places
See Notes 1 & 2
1
2
.180
[4.57]
See Note 6
.469 ± .022
[11.91 ± 0.55]
Overall Height
3
.150 [3.81]
.44 [11.1]
.300 [7.62]
.600 [15.24]
NOTES
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 1-3, 5-7 are 0.040” (1.02mm) diameter, with 0.080” (2.03mm)
diameter standoff shoulders.
5) Pins 4 and 8 are 0.062” (1.57 mm) diameter with 0.100” (2.54 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) Weight: 2.15 oz. (60.9 g) typical
10) All dimensions in inches (mm)
Tolerances: x.xx in +/-0.02 in. (x.xmm +/-0.5 mm)
x.xxx in +/-0.010 in. (x.xxmm +/-0.25 mm)
Product # PQ65180QGx06
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PIN DESIGNATIONS
Pin
Name
1
Vin(+)
2
ON/OFF
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
3
Vin(–)
4
Vout(-)
5
SENSE(–)
6
TRIM
7
SENSE(+)
8
Vout(+)
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.# 005-2Q581D Rev. C
01/16/14
Page 3
Input: 40V – 75V
Output: 18V
Current: 5.6A
Package: Quarter-brick
Technical Specifications
PQ65180QGx06 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.
ABSOLUTE MAXIMUM RATINGS
Input Voltage
Non-Operating
Operating
Operating Transient Protection
Isolation Voltage (input to output)
Operating Temperature
Storage Temperature
Voltage at ON/OFF input pin
INPUT CHARACTERISTICS
Operating Input Voltage Range
Input Under-Voltage Lockout
Turn-On Voltage Threshold
Turn-Off Voltage Threshold
Lockout Voltage Hysteresis
Maximum Input Current
No-Load Input Current
Disabled Input Current
Inrush Current Transient Rating
Response to Input Transient
Input Reflected Ripple Current
Input Terminal Ripple Current
Recommended Input Fuse
Input Filter Component Values (C\L)
Recommended External Input Capacitance
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 # PQ65180QGx06
Typ.
-1
-40
-55
-2
Max.
Units Notes & Conditions
100
80
100
2000
100
125
18
V
V
V
V
°C
°C
V
40
48
75
V
37
33.5
2.5
38
34.5
3.5
39
35.5
4.5
3.0
120
3
0.04
V
V
V
A
mA
mA
A2s
mV
mA
mA
A
µF\µH
µF
80
1.6
600
4
60
20
2.46\4.7
47
17.73
18.00
18.27
V
±0.04\ 7
±0.04\ 7
±112
±0.02\ 36
±0.02\ 36
±300
18.57
%\mV
%\mV
mV
V
120
30
5.6
7.7
mV
mV
A
A
V
A
mA
µF
17.43
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50
15
0
5.9
0.1
0
6.7
10.0
0.3
10
0.6
50
2,000
91
90
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%
%
Continuous
Continuous
100ms transient, square wave
Basic insulation, Pollution Degree 2
100% Load, 40V Vin
1000V/ms input transient
RMS thru 10μH inductor; Figs. 13 & 15
RMS; Figs. 13 & 14
Fast acting external fuse recommended
Internal values, see Figure E
Typical ESR 0.1-0.2Ω; Figure 13
Factory pre-set with Sense(+), Sense(-) open
Over sample, line, load, temperature & life
20MHz bandwidth; Fig. 13 & 16
Full load; see Figures 13 & 16
Full load; see Figures 13 & 16
Subject to thermal derating
Output Voltage 10% Low; Figure 17
See Note 3
Negative current drawn from output
Negative current drawn from output
18Vout at 5.6A Resistive Load
Figures 1 - 4
Figures 1 - 4
Doc.# 005-2Q581D Rev. C
01/16/14
Page 4
Input: 40V – 75V
Output: 18V
Current: 5.6A
Package: Quarter-brick
Technical Specifications
PQ65180QGx06 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.
Units Notes & Conditions
DYNAMIC CHARACTERISTICS
Input Voltage Ripple Rejection
70
dB
120 Hz; Fig. 20
Output Voltage during Load Current Transient
Step Change in Output Current (0.1A/µs)
250
mV
50% to 75% to 50% Iout max, Figure 11
Step Change in Output Current (5A/µs)
250
mV
50% to 75% to 50% Iout max, Figure 12
Settling time
800
µs
To within 1% Vout nom
Turn-On Transient
Turn-On Time
10
12
15
ms
Full load, Vout=90% nom; Figures 9 & 10
Start-Up Inhibit Time
180
200
240
ms
-40°C to +125°C; Figure F
Output Voltage Overshoot
0
%
2,000 μF load capacitance, Iout = 0A
ISOLATION CHARACTERISTICS
Isolation Voltage (dielectric strength)
2000
V
Isolation Resistance
30
MΩ
Isolation Capacitance (input to output)
470
pF
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
See Figures 5 - 8 for derating curves
FEATURE CHARACTERISTICS
Switching Frequency
265
290
355
kHz
Regulation and Isolation stage
ON/OFF Control (Option P)
Off-State Voltage
-2
0.8
V
On-State Voltage
2.4
18
V
ON/OFF Control (Option N)
Off-State Voltage
2.4
18
V
On-State Voltage
-2
0.8
ON/OFF Control (Either Option)
Application notes; Figure A, B
Pull-Up Voltage
Vin/6.5
9.2
V
Pull-Up Resistance
40
kΩ
Output Voltage Trim Range
-20
+10
%
Measured across Pins 8 & 4; Figure C
Output Voltage Remote Sense Range
+10
Measured across Pins 8 & 4
Output Over-Voltage Protection
117
122
127
%
Over Full Temperature Range; % of nominial Vout
Over-Temperature Shutdown
125
°C
Average PCB Temperature
Over-Temperature Shutdown Restart Hysteresis
10
°C
Load Current Scale Factor
175
See App Note: Output Load Current Calc.
RELIABILITY CHARACTERISTICS
Calculated MTBF (Telcordia)
2.8
106 Hrs. TR-NWT-000332; 80% load, 300LFM, 40°C Ta
Calculated MTBF (MIL-217)
1.8
106 Hrs. MIL-HDBK-217F; 80% load, 300LFM, 40°C Ta
Field Demonstrated MTBF
106 Hrs. See our website for latest values
Note 1: For applications requiring reduced output voltage ripple and noise, consult SynQor applications support (e-mail: [email protected])
Note 2: Higher values of isolation capacitance can be added external to the module.
Product # PQ65180QGx06
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Doc.# 005-2Q581D Rev. C
01/16/14
Page 5
Input: 40V – 75V
Output: 18V
Current: 5.6A
Package: Quarter-brick
Technical Specifications
Standards Compliance & Qualification Testing
Parameter
Notes & Conditions
STANDARDS COMPLIANCE
UL 60950-1:R2011-12
Basic insulation
EN60950-1/A12:2011
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 # PQ65180QGx06
# 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.# 005-2Q581D Rev. C
01/16/14
Page 6
Input: 40V – 75V
Output: 18V
Current: 5.6A
Package: Quarter-brick
Technical Figures
94
95
93
92
85
Efficiency (%)
Efficiency (%)
90
80
75
65
90
25 C
89
40 Vin
70
91
40 C
48 Vin
75 Vin
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
88
5.5
6.0
55 C
0
100
Load Current (A)
Figure 1: Efficiency at nominal output voltage vs. load current for minimum,
nominal, and maximum input voltage at 25°C.
200
300
400
500
Air Flow (LFM)
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).
8
12
11
7
9
Power Dissipation (W)
Power Dissipation (W)
10
8
7
6
5
4
3
40 Vin
2
5
25 C
48 Vin
1
0
6
40 C
75 Vin
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
4
6.0
55 C
0
100
200
300
400
500
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).
6.0
5.5
5.0
4.5
Iout (A)
4.0
3.5
3.0
2.5
400 LFM (2.0 m/s)
2.0
300 LFM (1.5 m/s)
1.5
200 LFM (1.0 m/s)
1.0
100 LFM (0.5 m/s)
0.5
0.0
50 LFM (0.25 m/s)
0
25
40
55
70
85
Semiconductor junction temperature is
within 1°C of surface temperature
Ambient Air Temperature (oC)
Figure 5: Maximum output power derating curves vs. ambient air temperature
for airflow rates of 50 LFM through 400 LFM with air flowing across the
converter from pin 1 to pin 3 (nominal input voltage).
Product # PQ65180QGx06
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Figure 6: Thermal plot of converter at 6.1 amp load current (110W) with 55°C
air flowing at the rate of 200 LFM. Air is flowing across the converter sideways
from pin 1 to pin 3 (nominal input voltage).
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Doc.# 005-2Q581D Rev. C
01/16/14
Page 7
Input: 40V – 75V
Output: 18V
Current: 5.6A
Package: Quarter-brick
Technical Figures
6.0
5.5
5.0
4.5
Iout (A)
4.0
3.5
3.0
2.5
400 LFM (2.0 m/s)
2.0
300 LFM (1.5 m/s)
1.5
200 LFM (1.0 m/s)
1.0
100 LFM (0.5 m/s)
0.5
0.0
50 LFM (0.25 m/s)
0
25
40
55
70
85
Ambient Air Temperature (oC)
Figure 7: Maximum output power-derating curves vs. ambient air temperature
for airflow rates of 50 LFM through 400 LFM with air flowing lengthwise from
input to output (nominal input voltage).
Figure 8: Thermal plot of converter at 6.0 amp load current (108W)
with 55°C air flowing at the rate of 200 LFM. Air is flowing across the
converter from input to output (nominal input voltage).
Figure 9: Turn-on transient at full load (resistive load) (10 ms/div). Input voltage
pre-applied. Ch 1: Vout (5V/div). Ch 2: ON/OFF input (5V/div)
Figure 10: Turn-on transient at zero load (10 ms/div).
Ch 1: Vout (5V/div)
Ch 2: 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: 10µF, 100 mΩ ESR tantalum
capacitor and 1µF ceramic capacitor. Ch 1: Vout (500mV/div), Ch 2: Iout (2A/
div).
Figure 12: Output voltage response to step-change in load current (50%-75%50% of Iout(max): dI/dt = 5A/µs). Load cap: 100µF, 30 mΩ ESR tantalum
capacitor and 1µF ceramic cap. Ch 1: Vout (500mV/div), Ch 2: Iout (2A/div).
Product # PQ65180QGx06
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Doc.# 005-2Q581D Rev. C
01/16/14
Page 8
Input: 40V – 75V
Output: 18V
Current: 5.6A
Package: Quarter-brick
Technical Figures
See Fig. 15
See Fig. 14
10 µH
source
impedance
iS
iC
VSOURCE
See Fig. 16
1 µF
ceramic
capacitor
DC-DC
Converter
VOUT
10 µF,
100mΩ ESR
tantalum
capacitor
47 µF,
<1Ω ESR
electrolytic
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 10µH source impedance and 47µF electrolytic
capacitor (100 mA/div). See Figure 13.
Figure 15: Input reflected ripple current, is, through a 10µH source inductor at
nominal input voltage and rated load current (5mA/div). See Figure 13.
Figure 16: Output voltage ripple at nominal input voltage and rated
load current (20 mV/div). Load capacitance: 1µF ceramic capacitor
and 10µF tantalum capacitor. Bandwidth: 20 MHz. See Figure 13.
20
18
16
Output Voltage (V)
14
12
10
8
40 V
6
48 V
4
75 V
2
0
0
1
2
3
4
5
Load Current (A)
6
7
8
9
Figure 17: Output voltage vs. load current showing typical current limit curves
and converter shutdown points.
Product # PQ65180QGx06
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Figure 18: Load current (5A/div) as a function of time when the converter
attempts to turn on into a 10mΩ short circuit. Top trace (2.0ms/div) is an
expansion of the on-time portion of the bottom trace.
www.synqor.com
Doc.# 005-2Q581D Rev. C
01/16/14
Page 9
Input: 40V – 75V
Output: 18V
Current: 5.6A
Package: Quarter-brick
Technical Figures
1
0
Forward Transmission (dB)
Output Impedance (Ω)
-10
0.1
0.01
40 Vin
0.001
10
-20
-30
-40
-50
-60
-70
48 Vin
-80
75 Vin
-90
100
1,000
10,000
40 Vin
48 Vin
75 Vin
-100
100
100,000
1,000
Hz
10,000
100,000
Hz
Figure 19: Magnitude of incremental output impedance (Zout = vout/iout) for
minimum, nominal, and maximum input voltage at full rated power.
Figure 20: Magnitude of incremental forward transmission (FT = vout/vin) for
minimum, nominal, and maximum input voltage at full rated power.
10
100
-10
-20
Input Impedance (Ω)
Reverse Transmission (dB)
0
40 Vin
48 Vin
-30
75 Vin
10
1
40 Vin
48 Vin
-40
-50
75 Vin
10
100
1,000
10,000
0.1
100,000
Figure 21: Magnitude of incremental reverse transmission (RT = iin/iout) for
minimum, nominal, and maximum input voltage at full rated power.
Product # PQ65180QGx06
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10
100
1,000
10,000
100,000
Hz
Hz
Figure 22: Magnitude of incremental input impedance (Zin = vin/iin) for
minimum, nominal, and maximum input voltage at full rated power.
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Doc.# 005-2Q581D Rev. C
01/16/14
Page 10
Input: 40V – 75V
Output: 18V
Current: 5.6A
Package: Quarter-brick
Applications Section
BASIC OPERATION AND FEATURES
CONTROL FEATURES
The PowerQor series converter uses a two-stage power conversion topology. The first stage is a buck-converter that keeps
the output voltage constant over variations in line, load, and
temperature. The second stage uses a transformer to provide
the functions of input/output isolation and voltage step-down to
achieve the low output voltage required.
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.
Both the first stage and the second stage switch at a fixed
frequency for predictable EMI performance. Rectification of the
transformer’s output is accomplished with synchronous rectifiers. These devices, which are MOSFETs with a very low on-state
resistance, dissipate far less energy than Schottky diodes. This
is the primary reason that the PowerQor converter has such
high efficiency, even at very low output voltages and very high
output currents.
Dissipation throughout the converter is so low that it does
not require a heatsink for operation. Since a heatsink is not
required, the PowerQor converter does not need a metal baseplate or potting material to help conduct the dissipated energy
to the heatsink. The PowerQor converter can thus be built more
simply and reliably using high yield surface mount techniques
on a PCB substrate.
The PowerQor series of half-brick and quarter-brick converters
uses the industry standard footprint and pin-out configuration.
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. Figure B is a detailed look of the
internal ON/OFF circuitry.
REMOTE SENSE(+) (Pins 7 and 5): The SENSE(+) inputs
correct for voltage drops along the conductors that connect the
converter’s output pins to the load.
Pin 7 should be connected to Vout(+) and Pin 5 should be connected to Vout(-) at the point on the board where regulation is
desired. A remote connection at the load can adjust for a voltage drop only as large as that specified in this datasheet, that is
[Vout(+) - Vout(-)] – [Vsense(+) - Vsense(-)] <
Sense Range % x Vout
Pins 7 and 5 must be connected for proper regulation of the
output voltage. If these connections are not made, the converter
will deliver an output voltage that is slightly lower than its specified value.
ON/OFF
ON/OFF
ON/OFF
Vin(_)
Vin(_)
Vin(_)
Remote Enable Circuit
Negative Logic
(Permanently Enabled)
ON/OFF
Positive Logic
(Permanently Enabled)
5V
274k
50k
TTL
ON/OFF
Vin(_)
Vin(_)
100pF
50k
Vin(_)
Direct Logic Drive
Figure A: Various circuits for driving the ON/OFF pin.
Product # PQ65180QGx06
5V
ON/OFF
TTL/
CMOS
Open Collector Enable Circuit
Vin(+)
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Figure B: Internal ON/OFF pin circuitry
Doc.# 005-2Q581D Rev. C
01/16/14
Page 11
Input: 40V – 75V
Output: 18V
Current: 5.6A
Package: Quarter-brick
Applications Section
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.
To decrease the output voltage, the user should connect a resistor between Pin 6 and Pin 5 (SENSE(-) input). For a desired
decrease of the nominal output voltage, the value of the resistor
should be
Rtrim-down =
- 10.22
(511
D%)
(kW)
where
D% =
Vnominal – Vdesired
Vnominal
x 100%
To increase the output voltage, the user should connect a resistor between Pin 6 and Pin 7 (SENSE(+) input). For a desired
increase of the nominal output voltage, the value of the resistor
should be
Rtrim-up =
(
5.11VOUT(100+D%) _ 511 _
10.22
1.225D%
D%
)
(kW)
where
VOUT = Nominal Output Voltage
Figure C graphs the relationship between the trim resistor value
and Rtrim-up and Rtrim-down, showing the total range the output voltage can be trimmed up or down.
Trim Resistance (kOhms)
100,000
10,000
1,000
100
10
0
2
4
6
8
10
% increase Vout
12
14
16
% decrease Vout
Figure C: Trim Graph for 18Vout module
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18
20
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 bypassed 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.
PROTECTION FEATURES
Input Under-Voltage Lockout: The converter is designed
to turn off when the input voltage is too low, helping avoid an
input system instability problem, described in more detail in the
application note titled “Input System Instability”. The lockout
circuitry is a comparator with DC hysteresis. When the input
voltage is rising, it must exceed the typical Turn-On Voltage
Threshold value (listed on the specification page) before the
converter will turn on. Once the converter is on, the input voltage must fall below the typical Turn-Off Voltage Threshold value
before the converter will turn off.
Output Current Limit: The maximum current limit remains
constant as the output voltage drops. However, once the impedance of the short across the output is small enough to make the
output voltage drop below the specified Output DC Current-Limit
Shutdown Voltage, the converter turns off.
The converter then enters a “hiccup mode” where it repeatedly
turns on and off at a 5 Hz (nominal) frequency with a 5% duty
cycle until the short circuit condition is removed. This prevents
excessive heating of the converter or the load board.
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
200 ms the converter will automatically restart.
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.
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Doc.# 005-2Q581D Rev. C
01/16/14
Page 12
Input: 40V – 75V
Output: 18V
Current: 5.6A
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 web site
(www.synqor.com) which provides an understanding of why
this instability arises, and shows the preferred solution for
correcting it.
Input Filtering and External Capacitance: Figure E
below provides a diagram showing the internal input filter components. This filter dramatically reduces input terminal ripple
current, which otherwise could exceed the rating of an external
electrolytic input capacitor. The recommended external input
capacitance is specified in the “Input Characterisitcs” section.
More detailed information is available in the application note
titled “EMI Characteristics” on the SynQor website.
Application Circuits: Figure D below provides a typical circuit
diagram which details the input filtering and voltage trimming.
Vin(+)
Vin
External
Input
Filter
Vsense(+)
Electrolytic
Capacitor
47µF
Vout(+)
ON/OFF
Trim
Vsense(_)
Vin(_)
Rtrim-up
or
Rtrim-down
Cload
Iload
Vout(_)
Figure D: Typical application circuit (negative logic unit, permanently enabled).
L
Vin(+)
C
Vin(_)
Figure E: Internal Input Filter Diagram (component values listed on page 3).
Product # PQ65180QGx06
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Doc.# 005-2Q581D Rev. C
01/16/14
Page 13
Input: 40V – 75V
Output: 18V
Current: 5.6A
Package: Quarter-brick
Applications Section
Startup Inhibit Period: The Startup Inhibit Period ensures
that the converter will remain off for at least 200ms when it is
shut down for any reason. When an output short is present,
this generates a 5Hz “hiccup mode,” which prevents the converter from overheating. In all, there are seven ways that the
converter can be shut down, initiating a Startup Inhibit Period:
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.
• Input Under-Voltage Lockout
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.
• Input Over-Voltage Shutdown (not present in Quarter-brick)
• Output Over-Voltage Protection
When the ON/OFF pin goes high after t2, the Startup Inhibit
Period has elapsed, and the output turns on within the typical
Turn-On Time.
• Over Temperature Shutdown
• Current Limit
• Short Circuit Protection
• Turned off by the ON/OFF input
Figure F shows three turn-on scenarios, where a Startup Inhibit
Period is initiated at t0, t1, and t2:
Vin
Under-Voltage
Lockout Turn-On
Threshold
ON/OFF
(pos logic)
ON
Vout
OFF ON
OFF
ON
4ms (typical
turn on time)
200ms
(typical start-up
inhibit period)
t1
t0
200ms
200ms
t2
t
Figure F: Startup Inhibit Period (turn-on time not to scale)
Product # PQ65180QGx06
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Doc.# 005-2Q581D Rev. C
01/16/14
Page 14
Technical
Specification
PQ65180QGx06
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 6 5 1 8 0 Q G x 0 6 N K S - G
6/6 RoHS
Options
(see
Ordering Information)
Model Number
Input Voltage
PQ65180QGx06
40V – 75V
Output
Voltage
18V
Max Output
Current
5.6A
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
S - 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 # PQ65180QGx06
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
Warranty
SynQor offers a three (3) year limited warranty. Complete warranty
information is listed on our website or is available upon request from
SynQor.
Information furnished by SynQor is believed to be accurate and reliable.
However, no responsibility is assumed by SynQor for its use, nor for any
infringements of patents or other rights of third parties which may result
from its use. No license is granted by implication or otherwise under any
patent or patent rights of SynQor.
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Doc.# 005-2Q581D Rev. C
01/16/14
Page 15
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