30A/150W

Technical
Specification
PQ60050QTA30
48Vin
5.0Vout
30Amp
2000Vdc
Quarter-brick
Input
Output
Current
Isolation
DC/DC Converter
The PQ60050QTA30 PowerQor® Tera quarter-brick
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 high-yield surface mount technology.
Since the PowerQor converter has no explicit thermal
interfaces, it is extremely reliable. The Tera series
offers the maximum useable output current for any
standard “quarter-brick” module. RoHS compliant
(see page 13).
PQ60050QTA30 Module
Operational Features
Protection Features
• Ultra-high efficiency, >90% at full rated load current
• Delivers up to 30 amps of output current (150W) with
minimal derating - no heatsink required
• Wide input voltage range: 35 – 75V, with 100V 100ms
input voltage transient capability
• Fixed frequency switching provides predictable EMI
performance
• No minimum load requirement means no preload
resistors required
Mechanical Features
• Industry standard quarter-brick pin-out configuration
• Industry standard size: 1.45” x 2.3” (36.8x58.4mm)
• Total height less than 0.43” (10.9mm), permits better
airflow and smaller card pitch
• Total weight: 1.5 oz. (42 grams)
• Flanged pins designed to permit surface mount
soldering (avoid wave solder) using FPiP technique
Safety Features
•
•
•
•
•
2000 V, 30MΩ input-to-output isolation
UL 60950-1:2003, basic insulation
CAN/CSA-C22.2 No. 60950-1:2003
EN60950-1:2001
RoHS compliant (see page 13)
Contents
Control Features
• On/Off control referenced to input side (positive and
negative logic options are available)
• Remote sense for the output voltage compensates for
output distribution drops
• Output voltage trim permits custom voltages and
voltage margining
Product # PQ60050QTA30
• Input under-voltage lockout disables converter at low
input voltage conditions
• Output current limit and short circuit protection
protects converter and load from permanent damage
and consequent hazardous conditions
• Active back bias limit prevents damage to converter
from external load induced pre-bias
• Output over-voltage protection protects load from
damaging voltages
• Thermal shutdown protects converter from abnormal
environmental conditions
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Page No.
Mechanical Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
PQ60050QTD30 ELECTRICAL CHARACTERISTICS . . . . . . . . . . . . . . . . . . 3STANDARDS COMPLIANCE & QUALIFICATION TESTING . . . . . . . . . . . . . 4
Figures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-8
Application section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-12
Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
www.synqor.com
Doc.# 005-2QT650C Rev. E
05/20/09
Page 1
Input:
Output:
Current:
Package:
Technical Specification
35-75 V
5.0 V
30 A
Quarter-brick
Mechanical Diagram
0.145
Top View
Side View
(3.68)
0.600
(15.24)
0.450
(11.43)
.43
(10.9)
0.300
(7.62)
0.150
0.145
(3.81)
(3.68)
See
Note 3
8 7 6 5 4
2.00
(50.8)
2.30
(58.4)
.14
(3.6)
1
2
3
.43
(10.9)
PIN
FARSIDE
TYPICAL
SEE NOTES
1, 2, AND 4
.300
(7.62)
0.060 +.022/-.032
(1.52 +.55/-.81)
BOTTOMSIDE
CLEARANCE
0.600
(15.24)
NOTES
PIN DESIGNATIONS
1) Pins 1-3, 5-7 are 0.040” (1.02mm) diameter with
0.080” (2.03 mm) diameter standoff shoulders.
2) Pins 4 and 8 are 0.062” (1.57 mm) diameter with 0.100”
(2.54 mm) diameter standoff shoulders.
3) Other pin extension lengths available.
4) All Pins: Material - Copper Alloy
Finish - Matte Tin over Nickel plate
5) Undimensioned components are shown for visual reference only.
6) All dimensions in inches (mm)
Tolerances:
x.xx +/-0.02 in. (x.x +/-0.5mm)
x.xxx +/-0.010 in. (x.xx +/-0.25mm)
7) Weight: 2.4 oz. (68 g) typical
8) Workmanship: Meets or exceeds IPC-A-610C Class II
9) UL/TUV standards require a clearance greater than 0.04”
(1.02mm) between input and output for Basic insulation. This
issue should be considered if any copper traces are on the top side
of the user’s board. Note that the ferrite cores are considered part
of the input/primary circuit.
10) The flanged pins are designed to permit surface mount soldering
(allowing to avoid the wave soldering process) through the use of the
flanged pin-in-paste technique.
Product # PQ60050QTA30
Phone 1-888-567-9596
Pin
Name
Function
1
Vin(+)
Positive input voltage
2
ON/OFF TTL input to turn converter on and off,
referenced to Vin(-), with internal pull up.
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
Vout(+)
Positive output voltage
8
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.# 005-2QT650C Rev. E
05/20/09
Page 2
Input:
Output:
Current:
Package:
Technical Specification
35-75 V
5.0 V
30 A
Quarter-brick
PQ60050QTD30 ELECTRICAL CHARACTERISTICS
TA=25°C, airflow rate=300 LFM, Vin=48Vdc unless otherwise noted; full operating temperature range is -40°C to +100°C ambient
temperature with appropriate power derating. Specifications subject to change without notice.
Parameter Min.
Typ.
ABSOLUTE MAXIMUM RATINGS
Input Voltage
Non-Operating
Operating
Operating Transient Protection
Isolation Voltage (input to output)
Operating Temperature
-40
Storage Temperature
-55
Voltage at ON/OFF input pin
-2
INPUT CHARACTERISTICS
Max.
100
80
100
2000
100
125
18
Operating Input Voltage Range
35
48
75
Input Under-Voltage Lockout
Turn-On Voltage Threshold
33
34
35
Turn-Off Voltage Threshold
30.5
31.5
32.5
Lockout Voltage Hysteresis
2.5
3.5
4.5
Maximum Input Current
5.5
No-Load Input Current
70
120
Disabled Input Current
1.6
3
Inrush Current Transient Rating
0.01
Response to Input Transient
500
Input Reflected Ripple Current
7
Input Terminal Ripple Current
185
Recommended Input Fuse
7
Input Filter Component Values (L\C)
2.0\6.6
Recommended External Input Capacitance
47
OUTPUT CHARACTERISTICS
Units Notes & Conditions
V
V
V
V
°C
°C
V
Continuous
Continuous
100ms transient, square wave
Basic insulation, Pollution Degree 2
V
V
V
V
A
mA
mA
A 2s
mV
mA
mA
A
µH\µF
µF
Output Voltage Set Point
4.950
5.000
5.050
V
Output Voltage Regulation
+
+
Over Line
0.05 \ 2 0.2 \ 10 %\mV
+0.05 \ 2 +0.2 \ 10 %\mV
Over Load
+25
+75
Over Temperature
mV
Total Output Voltage Range
4.87
5.13
V
1
Output Voltage Ripple and Noise Peak-to-Peak
50
100
mV
RMS
10
20
mV
Operating Output Current Range
0
30
A
Output DC Current-Limit Inception
33
36.5
39
A
Output DC Current-Limit Shutdown Voltage
3.2
V
Back-Drive Current Limit while Enabled
0.5
1.3
2.5
A
Back-Drive Current Limit while Disabled
0
10
50
mA
Maximum Output Capacitance
9,800
µF
DYNAMIC CHARACTERISTICS
100% Load, 35 Vin, trim up, in current limit
1000V/ms input transient
P-P thru 10µH inductor; Figures 13 & 15
RMS; Figures 13 & 14
Fast blow external fuse recommended
Internal values; see Figure E
Typical ESR 0.1-0.2W; see Figure 13
Over sample, line, load, temperature & life
500MHz bandwidth; Figures 13 & 16
Full Load; see Figures 13 & 16
Full Load; see Figures 13 & 16
Subject to thermal derating; Figures 5 - 8
Output Voltage 10% Low; Figure 17
Negative current drawn from output
Negative current drawn from output
5.0Vout at 30A Resistive Load
Input Voltage Ripple Rejection
60
dB
Output Voltage during Load Current Transient
For a Step Change in Output Current (0.1A/µs)
200
mV
For a Step Change in Output Current (1A/µs)
200
mV
Settling Time
400
µs
Turn-On Transient
Turn-On Time
6
9.2
12
ms
Start-Up Inhibit Time
180
200
240
ms
Output Voltage Overshoot
0
%
120 Hz; Figure 20
%
%
Figures 1 - 4
Figures 1 - 4
°C
°C
°C
Package rated to 150°C
UL rated max operating temp 130°C
See Figures 5 - 8 for derating curves
EFFICIENCY
100% Load
50% Load
TEMPERATURE LIMITS FOR POWER DERATING CURVES
90
91
Semiconductor Junction Temperature
Board Temperature
Transformer Temperature
ISOLATION CHARACTERISTICS
Isolation Voltage (dielectric strength)
Isolation Resistance
Isolation Capacitance2
125
125
125
2000
30
470
50% to 75% to 50% Iout max; Figure 11
50% to 75% to 50% Iout max; Figure 12
To within 1% Vout nom
Full load, Vout=90% nom.; Figures 9 & 10
-40°C to +125°C; Figure F
9,800 µF load capacitance, Iout = 0A
V
MW
pF
Note 1: For applications requiring reduced output voltage ripple and noise, consult SynQor applications support (e-mail: [email protected])
Note 2: Higher values of isolation capacitance can be added external to the module.
Product # PQ60050QTA30
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-2QT650C Rev. E
05/20/09
Page 3
Input:
Output:
Current:
Package:
Technical Specification
35-75 V
5.0 V
30 A
Quarter-brick
ELECTRICAL CHARACTERISTICS (Continued)
Parameter P
Min.
Typ.
Max.
Units Notes & Conditions
FEATURE CHARACTERISTICS
Switching Frequency
250
280
310
kHz
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
V
ON/OFF Control (Either Option)
Pull-Up Voltage
Vin/6.5
9.2
V
Pull-Up Resistance
40
kW
Output Voltage Trim Range
-20
+10
%
Output Voltage Remote Sense Range
+10
%
Output Over-Voltage Protection
117
122
127
%
Over-Temperature Shutdown
125
°C
Over-Temperature Shutdown Restart Hysteresis
10
°C
Load Current Scale Factor
857
RELIABILITY CHARACTERISTICS
Calculated MTBF (Telcordia)
2.1
Calculated MTBF (MIL-217)
1.75
Field Demonstrated MTBF
Regulation and Isolation stage
Figures A & B
Measured across Pins 8 & 4; Figures 23 & C
Measured across Pins 8 & 4
Over full temp range; % of nominal Vout
Average PCB Temperature
See App Note: Output Load Current Calc.
10 Hrs. TR-NWT-000332; 80% load,300LFM, 40oC Ta
106 Hrs. MIL-HDBK-217F; 80% load, 300LFM, 40oC Ta
106 Hrs. See our website for details
6
STANDARDS COMPLIANCE
Parameter P
Notes
UL/cUL 60950-1 EN60950-1 72/23/EEC
93/68/EEC
Needle Flame Test (IEC 695-2-2)
IEC 61000-4-2
GR-1089-CORE
Telcordia (Bellcore) GR-513
File # E194341, Basic insulation & pollution degree 2
Certified by TUV
STANDARDS COMPLIANCE
Test on entire assembly; board & plastic components UL94V-0 compliant
ESD test, 8kV - NP, 15kV air - NP (Normal Performance)
Section 7 - electrical safety, Section 9 - bonding/grounding
• An external input fuse must always be used to meet these safety requirements. Contact SynQor for official safety
certificates on new releases or download from the SynQor website.
QUALIFICATION TESTING
Parameter P
QUALIFICATION TESTING
Life Test
Vibration
Mechanical Shock
Temperature Cycling
Power/Thermal Cycling
Design Marginality
Humidity
Solderability
# Units
32
5
5
10
5
5
5
15 pins
Test Conditions
95% rated Vin and load, units at derating point, 1000 hours
10-55Hz sweep, 0.060” total excursion,1 min./sweep, 120 sweeps for 3 axis
100g minimum, 2 drops in x and y axis, 1 drop in z axis
-40°C to 100°C, unit temp. ramp 15°C/min., 500 cycles
Toperating = min to max, Vin = min to max, full load, 100 cycles
Tmin-10°C to Tmax+10°C, 5°C steps, Vin = min to max, 0-105% load
85°C, 85% RH, 1000 hours, 2 minutes on and 6 hours off
MIL-STD-883, method 2003
• Extensive characterization testing of all SynQor products and manufacturing processes is performed to ensure that we supply
robust, reliable product. Contact the factory for official product family qualification documents.
Product # PQ60050QTA30
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www.synqor.com
Doc.# 005-2QT650C Rev. E
05/20/09
Page 4
Input:
Output:
Current:
Package:
Technical Specification
35-75 V
5.0 V
30 A
Quarter-brick
94
100
95
93
90
Efficiency (%)
Efficiency (%)
92
85
80
91
90
75
35 Vin
48 Vin
75 Vin
70
25 C
40 C
89
65
55 C
88
0
5
10
15
20
25
30
0
100
Load Current (A)
200
300
400
500
Air Flow (LFM)
Figure 1: Efficiency at nominal output voltage vs. load current for
minimum, nominal, and maximum input voltage at 25°C.
Figure 2: Efficiency at nominal output voltage and 60% rated power vs.
airflow rate for ambient air temperatures of 25°C, 40°C, and 55°C (nominal
input voltage).
10.0
18
16
9.0
Power Dissipation (W)
Power Dissipation (W)
14
12
10
8
6
35 Vin
48 Vin
75 Vin
4
2
8.0
7.0
6.0
25 C
40 C
55 C
5.0
0
4.0
0
5
10
15
20
25
30
0
Load Current (A)
Figure 3: Power dissipation at nominal output voltage vs. load current for
minimum, nominal, and maximum input voltage at 25°C.
100
200
300
Air Flow (LFM)
400
500
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).
30
25
Iout (A)
20
15
400 LFM (2.0 m/s)
10
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
5
50 LFM (0.25 m/s)
0
0
25
40
55
70
Semiconductor junction temperature is
within 1°C of surface temperature
85
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 3 to pin 1 (nominal input voltage).
Product # PQ60050QTA30
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Figure 6: Thermal plot of converter at 29 amp load current (145W)
with 55°C air flowing at the rate of 200 LFM. Air is flowing across the
converter from pin 3 to pin 1 (nominal input voltage).
www.synqor.com
Doc.# 005-2QT650C Rev. E
05/20/09
Page 5
Input:
Output:
Current:
Package:
Technical Specification
35-75 V
5.0 V
30 A
Quarter-brick
30
25
Iout (A)
20
15
400 LFM (2.0 m/s)
10
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
50 LFM (0.25 m/s)
5
0
0
25
40
55
70
Semiconductor junction temperature
is within 1°C of surface temperature
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
across the converter from input to output (nominal input voltage).
Figure 8: Thermal plot of converter at 26.5 amp load current (133W)
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 rated load (resistive load) (2 ms/div) Input
voltage pre-applied. Ch 1: Vout (2V/div). Ch 2: ON/OFF input (5V/div)
Figure 10: Turn-on transient at zero load current (2 ms/div).
Ch 1: Vout (2V/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 mW ESR tantalum
cap and 1µF ceramic capacitor. Ch 1: Vout (500mV/div), Ch 2: Iout (10A/div).
Figure 12: Output voltage response to step-change in load current (50%-75%50% of Iout(max): dI/dt = 5A/µs). Load cap: 470µF, 30 mW ESR tantalum
capacitor and 1µF ceramic cap. Ch 1: Vout (500mV/div), Ch 2: Iout (10A/div).
Product # PQ60050QTA30
Phone 1-888-567-9596
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Doc.# 005-2QT650C Rev. E
05/20/09
Page 6
Input:
Output:
Current:
Package:
Technical Specification
See Fig. 15
See Fig. 14
10 µH
See Fig. 16
source
impedance
iS
VSOURCE
35-75 V
5.0 V
30 A
Quarter-brick
iC
47 µF,
@1W ESR
electrolytic
capacitor
DC/DC
Converter
VOUT
1 µF
ceramic
capacitor
10 µF,
100mW ESR
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 10µH source impedance and 47µF
electrolytic capacitor (200 mA/div). See Figure 13.
Figure 15: Input reflected ripple current, is, through a 10 µH source
inductor at nominal input voltage and rated load current (10 mA/div). See
Figure 13.
Figure 16: Output voltage ripple at nominal input voltage and rated load
current (50 mV/div). Load capacitance: 1µF ceramic capacitor and 10µF
tantalum capacitor. Bandwidth: 500 MHz. See Figure 13.
Figure 17: Output voltage vs. load current showing typical current limit
curves and converter shutdown points.
Figure 18: Load current (20A/div) as a function of time when the converter
attempts to turn on into a 1 mW short circuit. Top trace (2ms/div) is an
expansion of the on-time portion of the bottom trace.
Product # PQ60050QTA30
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Doc.# 005-2QT650C Rev. E
05/20/09
Page 7
Input:
Output:
Current:
Package:
Technical Specification
0
0.1
35 Vin
-10
48 Vin
75 Vin
Forward Transmission (dB)
-20
Output Impedance (ohm)
35-75 V
5.0 V
30 A
Quarter-brick
0.01
0.001
-30
-40
-50
-60
-70
35 Vin
48 Vin
75 Vin
-80
-90
0.0001
-100
10
100
1,000
10,000
100,000
10
100
Hz
1,000
10,000
100,000
Hz
Figure 19: Magntiude of incremental output impedance (Zout = vout/iout)
for minimum, nominal, and maximum input voltage at full rated power.
0
Figure 20: Magnitude of incremental forward transmission (FT = vout/vin)
for minimum, nominal, and maximum input voltage at full rated power.
100
-5
-15
Input Impedance (ohm)
Reverse Transmission (dB)
-10
-20
-25
-30
-35
-40
35 Vin
-45
75 Vin
10
1
35 Vin
48 Vin
75 Vin
48 Vin
-50
0.1
10
100
1,000
10,000
100,000
10
Hz
Figure 21: Magnitude of incremental reverse transmission (RT = iin/iout)
for minimum, nominal, and maximum input voltage at full rated power.
100
1,000
Hz
10,000
100,000
Figure 22: Magnitude of incremental input impedance (Zin = vin/iin) for
minimum, nominal, and maximum input voltage at full rated power.
10
9
Vout Trim-up (%)
8
7
6
5
4
3
100% Load
2
50% Load
0% Load
1
0
40.0
39.5
39.0
38.5
38.0
37.5
37.0
36.5
36.0
35.5
35.0
Input Voltage (V)
Figure 23: Achievable trim-up percentage vs. input voltage. at output loads
of 0%, 50% and full load.
Product # PQ60050QTA30
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-2QT650C Rev. E
05/20/09
Page 8
Input:
Output:
Current:
Package:
Technical Specification
35-75 V
5.0 V
30 A
Quarter-brick
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.
ON/OFF
ON/OFF
ON/OFF
Vin(_)
Vin(_)
Vin(_)
Remote Enable Circuit
Negative Logic
(Permanently Enabled)
ON/OFF
Open Collector Enable Circuit
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 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.
5V
Vin(+)
Positive Logic
(Permanently Enabled)
274k
ON/OFF
5V
TTL/
CMOS
Vin(_)
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.
50k
TTL
100pF
50k
ON/OFF
Vin(_)
Vin(_)
Figure B: Internal ON/OFF pin circuitry
Direct Logic Drive
Figure A: Various circuits for driving the ON/OFF pin.
Product # PQ60050QTA30
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Doc.# 005-2QT650C Rev. E
05/20/09
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Input:
Output:
Current:
Package:
Technical Specification
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
( )
511
- 10.22 (kW)
Rtrim-down =
D%
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 _
1.225D%
D%
10.22
)
(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
18
20
% decrease Vout
35-75 V
5.0 V
30 A
Quarter-brick
Total DC Variation of Vout: For the converter to meet its full
specifications, the maximum variation of the DC value of Vout,
due to both trimming and remote load voltage drops, should not
be greater than that specified for the output voltage trim range.
PROTECTION FEATURES
Input Under-Voltage Lockout: The converter is designed to
turn off when the input voltage is too low, helping avoid an input
system instability problem, described in more detail in the application note titled “Input System Instability”. The lockout circuitry is a
comparator with DC hysteresis. When the input voltage is rising,
it must exceed the typical Turn-On Voltage Threshold value (listed
on the specification page) before the converter will turn on. Once
the converter is on, the input voltage must fall below the typical
Turn-Off Voltage Threshold value before the converter will turn off.
Output Current Limit: 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.
Figure C: Trim Graph for 5.0Vout module
Note: the TRIM feature does not affect the voltage at which the
output over-voltage protection circuit is triggered. Trimming the
output voltage too high may cause the over-voltage protection
circuit to engage, particularly during transients.
It is not necessary for the user to add capacitance at the Trim pin.
The node is internally bypassed to eliminate noise.
Product # PQ60050QTA30
Phone 1-888-567-9596
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Doc.# 005-2QT650C Rev. E
05/20/09
Page 10
Input:
Output:
Current:
Package:
Technical Specification
APPLICATION CONSIDERATIONS
Input System Instability: This condition can occur because
any DC/DC converter appears incrementally as a negative
resistance load. A detailed application note titled “Input System
Instability” is available on the SynQor web site (www.synqor.
com) which provides an understanding of why this instability
arises, and shows the preferred solution for correcting it.
35-75 V
5.0 V
30 A
Quarter-brick
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.
Vout(+)
Vin(+)
External
Input
Filter
Vin
Electrolytic
Capacitor
Vsense(+)
Trim
ON/OFF
Vsense(_)
Vin(_)
Rtrim-up
or
Rtrim-down
Cload
Iload
Vout(_)
Figure D: Typical application circuit (negative logic unit, permanently enabled).
Vin(+)
C1
C2
Vin(_)
Figure E: Internal Input Filter Diagram (component values
listed on page 3).
Product # PQ60050QTA30
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Doc.# 005-2QT650C Rev. E
05/20/09
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Input:
Output:
Current:
Package:
Technical Specification
Startup Inhibit Period: The Startup Inhibit Period ensures that
the converter will remain off for approximately 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:
• Input Under-Voltage Lockout
• Input Over-Voltage Shutdown (not present in Quarter-brick)
• Output Over-Voltage Protection
35-75 V
5.0 V
30 A
Quarter-brick
Figure F shows three turn-on scenarios, where a Startup Inhibit
Period is initiated at t0, t1, and t2:
Before time t0, when the input voltage is below the UVL threshold,
the unit is disabled by the Input Under-Voltage Lockout feature.
When the input voltage rises above the UVL threshold, the Input
Under-Voltage Lockout is released, and a Startup Inhibit Period is
initiated. At the end of this delay, the ON/OFF pin is evaluated,
and since it is active, the unit turns on.
At time t1, the unit is disabled by the ON/OFF pin, and it cannot
be enabled again until the Startup Inhibit Period has elapsed.
• Over Temperature Shutdown
• Current Limit
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.
• Short Circuit Protection
• Turned off by the ON/OFF input
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 # PQ60050QTA30
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Doc.# 005-2QT650C Rev. E
05/20/09
Page 12
Input:
Output:
Current:
Package:
Technical Specification
PART NUMBERING SYSTEM
35-75 V
5.0 V
30 A
Quarter-brick
ORDERING INFORMATION
The part numbering system for SynQor’s dc-dc converters
follows the format shown in the example below.
PQ 6 0 0 5 0Q T A3 0 N K S - G
6/6 RoHS
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.
Options (see
Ordering Information)
Model Number
PQ60010QTA40xyz
PQ60012QTA40xyz
PQ60015QTA40xyz
PQ60018QTA40xyz
PQ60025QTA40xyz
PQ60033QTA35xyz
PQ60050QTA30xyz
PQ60120QTA12xyz
Output Current
Thermal Design
Performance Level
Package Size
Output Voltage
Input Voltage
Continuous Input
Output Voltage Maximum Output Current
Voltage
35-75V
1.0V
40A
35-75V
1.2V
40A
35-75V
1.5V
40A
35-75V
1.8V
40A
35-75V
2.5V
40A
35-75V
3.3V
35A
35-75V
5V
30A
35-75V
12V
12A
The following options must be included in place of the x y z
spaces in the model numbers listed above.
Product Family
Options Description: x y z
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.
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]
Contact SynQor for further information:
Phone:
Toll Free:
Fax:
E-mail:
Web:
Address:
Product # PQ60050QTA30
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
Enable Logic
Pin Length
Feature Set
P - Positive
N - Negative
K - 0.110"
N - 0.145"
R - 0.180"
Y - 0.250"
S - Standard
Not all combinations make valid part numbers, please contact
SynQor for availability. See the Product Summary web page for
more options.
PATENTS
SynQor holds the following patents, one or more of which
might apply to this product:
5,999,417
6,594,159
6,927,987
7,119,524
6,222,742
6,731,520
7,050,309
7,269,034
6,545,890
6,894,468
7,072,190
7,272,021
6,577,109
6,896,526
7,085,146
7,272,023
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.# 005-2QT650C Rev. E
05/20/09
Page 13
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