20A/100W

Technical
Specification
PQ60050QGA20
48 V
5.0 V
20 A
2000 V dc
Quarther-brick
Input
Output
Current
Isolation
DC-DC Converter
The PQ60050QGA20 PowerQor® Giga 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 connections, it is extremely reliable.
Operational Features
• High efficiency, >89% at full rated load current
• Delivers up to 20 A of output current (100 W) with
minimal derating - no heatsink required
• Wide input voltage range: 35V – 75V, with 100V 100 ms
input voltage transient withstand
• Fixed frequency switching provides predictable
EMI performance
• No minimum load requirement means no preload
resistors required
• See the Baseplate Addendum web page for more options.
PQ60050QGA20 Module
Protection Features
• Input under-voltage lockout disables converter at low
input voltage conditions
• Output current limit and short circuit protection protects
converter from excessive load current or short circuits
• Output over-voltage protection protects load from
damaging voltages
• Thermal shutdown protects converter from abnormal
environmental conditions
Mechanical Features
• Industry standard quarter-brick pin-out configuration
• Industry standard size: 1.45” x 2.3”
• Total height less than 0.40”, permits better airflow and
smaller card pitch
• Total weight: 1.2 oz (34 g), lower mass greatly reduces
vibration and shock problems
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 # PQ60050QGA20
Phone 1-888-567-9596
Safety Features
• 2000 V, 10 MΩ input-to-output isolation provides input/
output ground separation
• UL/cUL 60950-1 recognized (US & Canada), basic
insulation rating
• TUV certified to EN60950-1
• Meets 72/23/EEC and 93/68/EEC directives which
facilitates CE Marking in user’s end product
• Board and plastic components meet UL94V-0
flammability requirements
www.synqor.com
Doc.# 005-2QG650D Rev. E
07/15/09
Page 1
Input:
Output:
Current:
Package:
Technical Specification
48 V
5.0 V
20 A
Quarter-brick
MECHANICAL DIAGRAM
Top View
2.30 (58.4)
2.00 (50.8)
0.14 (3.6)
0.43
(10.9)
1.45
(36.8)
0.600
(15.24)
1
0.300
(7.62)
8
7
6
5
4
2
3
0.150
(3.81)
0.300
(7.62)
0.450
(11.43) 0.600
(15.24)
Side View
Bottom side Clearance
See Note 9
Max. Height
0.40
(10.2)
0.063+/-0.026
0.145
(1.60+/-0.66)
(3.68)
See Note 3
Lowest
Component
Load Board
NOTES
PIN CONNECTIONS
1) Pins 1-3, 5-7 are 0.040" (1.02 mm) 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. Recommended pin
length is 0.03" (0.76 mm) greater than the PCB thickness.
4) All Pins: Material - Copper Alloy
Finish - Tin/Lead 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 +/-0.5 mm)
x.xxx +/-0.010 in. (x.xx +/-0.25 mm)
7) Weight: 1.2 oz (34 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 con‑
sidered part of the input/primary circuit.
10) See the Baseplate Addendum for more options.
Product # PQ60050QGA20
Phone 1-888-567-9596
Pin No. Name
1
Vin(+)
Function
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 sense1
6
TRIM
Output voltage trim2
7
SENSE(+)
Positive remote sense3
8
Vout(+)
Positive output voltage
Notes:
1. Pin 5 must be connected to Vout(-).
2. Leave Pin 6 open for nominal output voltage.
3. Pin 7 must be connected to Vout(+).
www.synqor.com
Doc.# 005-2QG650D Rev. E
07/15/09
Page 2
Input:
Output:
Current:
Package:
Technical Specification
48 V
5.0 V
20 A
Quarter-brick
PQ60050QGA20 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
32
33
34
Turn-Off Voltage Threshold
28.5
29.5
30.5
Lockout Hysteresis Voltage
2.5
3.5
4.5
Maximum Input Current
3.5
No-Load Input Current
80
120
Disabled Input Current
1.6
3
Inrush Current Transient Rating
0.01
Response to Input Transient
150
Input Reflected-Ripple Current
3
Recommended Input Fuse
20
Input Filter Component Values (C\L)
2.46\4.7
Recommended External Input Capacitance
33
47
OUTPUT CHARACTERISTICS
Units Notes & Conditions
V
V
V
V
°C
°C
V
continuous
continuous
100ms transient
Basic level, Pollution Degree 2
V
V
V
V
A
mA
mA
A 2s
mV
mA
A
µF\µH
µF
Output Voltage Set Point
4.950
5.000
5.050
V
Output Voltage Regulation
+0.05 \ 2 +0.2 \ 10 %\mV
Over Line
+0.05 \ 2 +0.2 \ 10 %\mV
Over Load
+25
+75
Over Temperature
mV
Total Output Voltage Range
4.87
5.13
V
Output Voltage Ripple and Noise
Peak-to-Peak
50
100
mV
RMS
10
20
mV
Operating Output Current Range
0
20
A
Output DC Current-Limit Inception
21
24
26
A
Output DC Current-Limit Shutdown Voltage
3.1
V
Back-Drive Current Limit while Enabled
0.5
1.0
2.0
A
Back-Drive Current Limit while Disabled
0
10
50
mA
Maximum Output Capacitance
6,000
µF
DYNAMIC CHARACTERISTICS
100% Load, 35 Vin
1000V/ms input transient
P-P thru 10µH inductor; Figs. 13 & 15
fast blow external fuse recommended
internal values, see Figure E
see Figure 13
over sample, line, load, temperature & life
20MHz bandwidth; Fig. 13 & 16
Full Load, see Figures 13 & 16
Full Load, see Figures 13 & 16
Output Voltage 10% Low; Fig. 17
Negative current drawn from output
Negative current drawn from output
5.0Vout at 20A Resistive Load
Input Voltage Ripple Rejection
71
dB
Output Voltage During Load Current Transient
Step Change in Output Current (0.1A/µs)
200
mV
Step Change in Output Current (5A/µs)
200
mV
Settling Time
300
µs
Turn-On Transient
Turn-On Time
4
8
ms
Start-Up Inhibit Time
180
200
240
ms
Output Voltage Overshoot
0
%
120 Hz; Fig. 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
89
89
Semiconductor Junction Temperature
Board Temperature
Transformer Temperature
ISOLATION CHARACTERISTICS
Isolation Voltage
Isolation Resistance
Isolation Capacitance
Product # PQ60050QGA20
Phone 1-888-567-9596
125
125
125
2000
30
470
www.synqor.com
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.; Figs. 9 & 10
-40°C to +125°C; Figure F
10,000 µF load capacitance, Iout = 0A
V
MW
pF
Doc.# 005-2QG650D Rev. E
07/15/09
Page 3
Input:
Output:
Current:
Package:
Technical Specification
48 V
5.0 V
20 A
Quarter-brick
PQ60050QGA20 ELECTRICAL CHARACTERISTICS (continued)
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 P
Min.
Typ.
Max.
Units Notes & Conditions
FEATURE CHARACTERISTICS
Switching Frequency
280
300
320
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
RELIABILITY CHARACTERISTICS
Calculated MTBF (Telcordia)
Calculated MTBF (MIL-217)
Demonstrated MTBF
Figures A, B
Measured across Pins 8 & 4; Figure C
Measured across Pins 8 & 4
Over full temp range; % of nominal Vout
Average PCB Temperature
106 Hrs. TR-NWT-000332; 80% load,300LFM, 40oC Ta
106 Hrs. MIL-HDBK-217F; 80% load, 300LFM, 40oC Ta
106 Hrs. Field demonstrated MTBF
2.8
1.8
>25
STANDARDS COMPLIANCE
Parameter
Notes & Conditions
STANDARDS COMPLIANCE
UL/cUL 60950-1 File # E194341, Basic insulation
EN60950-1 Certified by TUV
Needle Flame Test (IEC 695-2-2)
Test on entire assembly; board & plastic components UL94V-0 compliant
IEC 61000-4-2
ESD test, 8 kV - NP, 15 kV air - NP (Normal Performance)
Note: An external input fuse must always be used to meet these safety requirements. Contact SynQor for official safety certificates on new
releases or download from the SynQor website.
QUALIFICATION TESTING
Parameter
# Units
Test Conditions
QUALIFICATION TESTING
Life Test
32
95% rated Vin and load, units at derating point, 1000 hours
Vibration
5
10-55 Hz sweep, 0.060" total excursion, 1 min./sweep, 120 sweeps for 3 axis
Mechanical Shock
5
100g minimum, 2 drops in x and y axis, 1 drop in z axis
Temperature Cycling
10
-40 °C to 100 °C, unit temp. ramp 15 °C/min., 500 cycles
Power/Thermal Cycling
5
Toperating = min to max, Vin = min to max, full load, 100 cycles
Design Marginality
5
Tmin-10 °C to Tmax+10 °C, 5 °C steps, Vin = min to max, 0-105% load
Humidity
5
85 °C, 85% RH, 1000 hours, continuous Vin applied except 5 min/day
Solderability
Product # PQ60050QGA20
15 pins
Phone 1-888-567-9596
MIL-STD-883, method 2003
www.synqor.com
Doc.# 005-2QG650D Rev. E
07/15/09
Page 4
Input:
Output:
Current:
Package:
Technical Specification
95
90
90
89
88
Efficiency (%)
85
Efficiency (%)
48 V
5.0 V
20 A
Quarter-brick
80
75
70
36 Vin
48 Vin
75 Vin
65
87
86
85
84
25 C
40 C
83
55 C
82
60
0
2
4
6
8
10
12
Load Current (A)
14
16
18
0
20
100
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
16
9.5
14
9.0
Power Dissipation (W)
Power Dissipation (W)
12
10
8
6
36 Vin
4
48 Vin
75 Vin
2
8.5
8.0
7.5
7.0
6.5
6.0
25 C
40 C
5.5
55 C
5.0
0
0
2
4
6
8
10
12
Load Current (A)
14
16
18
0
20
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).
20
18
16
14
Iout (A)
12
10
8
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
0 LFM (0 m/s)
6
4
2
Semiconductor junction temperature is
within 1°C of surface temperature
0
0
25
40
55
Ambient Air Temperature (oC)
70
85
Figure 5: Maximum output power derating curves vs. ambient air temperature for airflow rates of 0 LFM through 400 LFM with air flowing
across the converter from pin 1 to pin 3 (nominal input voltage).
Product # PQ60050QGA20
Phone 1-888-567-9596
Figure 6: Thermal plot of converter at 15 amp load current 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).
www.synqor.com
Doc.# 005-2QG650D Rev. E
07/15/09
Page 5
Input:
Output:
Current:
Package:
Technical Specification
48 V
5.0 V
20 A
Quarter-brick
Semiconductor junction temperature is
within 1°C of surface temperature
Vin = 48V
Figure 7: Maximum output power derating curves vs. ambient air temperature for airflow rates of 0 LFM through 400 LFM with air flowing
lengthwise from input to output (nominal input voltage).
Figure 8: Thermal plot of converter at 15 amp load current 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), (2 ms/div).
Ch1: Vout (2V/div)
Ch2: ON/OFF input (5V/div)
Figure 10: Turn-on transient at zero load (2 ms/div).
Ch1: Vout (2V/div)
Ch2: 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. Ch1: Vout (200mV/div), Ch2: Iout (5A/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 mΩ ESR tantalum
capacitor and 1µF ceramic cap. Ch1: Vout (200mV/div), Ch2: Iout (5A/div).
Product # PQ60050QGA20
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-2QG650D Rev. E
07/15/09
Page 6
Input:
Output:
Current:
Package:
Technical Specification
Figure 15
10 µH
Figure 14
source
impedance
Figure 16
iS
VSOURCE
48 V
5.0 V
20 A
Quarter-brick
iC
DC/DC
Converter
VOUT
1 µF
47 µF,
<1W ESR
10 µF,
ceramic 100mW ESR
capacitor
tantalum
capacitor
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 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 (20 mV/div). Load capacitance: 1µF ceramic capacitor
and 10µF tantalum capacitor. Bandwidth: 20 MHz. See Figure 13.
8.0
7.0
Output Voltage (V)
6.0
5.0
4.0
3.0
36 V
48 V
75 V
2.0
1.0
0.0
0
5
10
15
Load Current (A)
20
Figure 17: Output voltage vs. load current showing typical current limit
curves and converter shutdown points.
Product # PQ60050QGA20
Phone 1-888-567-9596
Figure 18: Load current (10A/div) as a function of time when the
converter attempts to turn on into a 10 mW short circuit. Top trace
(2.5ms/div) is an expansion of the on-time portion of the bottom trace.
www.synqor.com
Doc.# 005-2QG650D Rev. E
07/15/09
Page 7
Input:
Output:
Current:
Package:
Technical Specification
1
48 V
5.0 V
20 A
Quarter-brick
0
Forward Transmission (dB)
-10
Output Impedance (W)
0.1
0.01
0.001
36 Vin
48 Vin
75 Vin
-20
-30
-40
-50
-60
-70
36 Vin
48 Vin
75 Vin
-80
-90
-100
0.0001
10
100
1,000
Hz
10,000
10
100,000
100
1,000
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.
100
0
Input Impedance (W)
Reverse Transmission (dB)
-10
-20
-30
-40
10
1
36 Vin
48 Vin
75 Vin
-50
36 Vin
48 Vin
75 Vin
-60
0.1
10
100
1,000
Hz
10,000
100,000
Figure 21: Magnitude of incremental reverse transmission (RT = iin/iout)
for minimum, nominal, and maximum input voltage at full rated power.
Product # PQ60050QGA20
Phone 1-888-567-9596
10
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.
www.synqor.com
Doc.# 005-2QG650D Rev. E
07/15/09
Page 8
Input:
Output:
Current:
Package:
Technical Specification
48 V
5.0 V
20 A
Quarter-brick
BASICOPERATIONANDFEATURES
CONTROLFEATURES
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 refer‑
encedtothereturnterminaloftheinputbus,Vin(-).Therearetwo
versions of the converter that differ by the sense of the logic used
fortheON/OFFinput.
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,
whichareMOSFETswithaverylowon-stateresistance,dissipatefar
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, quarter‑brick and eighth‑
brick converters uses the industry standard footprint and pin‑out
configuration.
See Product Summary web page for options.
Inthepositivelogicversion,theON/OFFinputisactivehigh(meaning
thatahighturnstheconverteron).Inthenegativelogicversion,the
ON/OFFsignalisactivelow(meaningthatalowturnstheconverter
on).FigureAdetailsfivepossiblecircuitsfordrivingtheON/OFFpin.
FigureBisadetailedlookoftheinternalON/OFFcircuitry.
REMOTE SENSE(+) (Pins 7 and 5):TheSENSE(+)inputscorrect
for voltage drops along the conductors that connect the converter’s
output pins to the load.
Pin7shouldbeconnectedtoVout(+)andPin5shouldbeconnected
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(-)] <
SenseRange%xVout
Pins7and5mustbeconnectedforproperregulationoftheoutput
voltage. If these connections are not made, the converter will deliver
an output voltage that is slightly lower than its specified value.
Note: the output over-voltage protection circuit senses the voltage
acrosstheoutput(pins8and4)todeterminewhenitshouldtrigger,
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
thatoutputOVPdoesnottrigger,evenduringloadtransients.
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 # PQ60050QGA20
5V
ON/OFF
TTL/
CMOS
Open Collector Enable Circuit
Vin(+)
Phone 1-888-567-9596
www.synqor.com
Figure B: Internal ON/OFF pin circuitry
Doc.# 005-2QG650D Rev. E
07/15/09
Page 9
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
betweenPin6andPin5(SENSE(-)input).Foradesireddecreaseof
the nominal output voltage, the value of the resistor should be
Rtrim‑down =
where
∆% =
-10.22
(511
∆%)
Vnominal–Vdesired
Vnominal
(kΩ)
x100%
To increase the output voltage, the user should connect a resistor
betweenPin6andPin7(SENSE(+)input).Foradesiredincreaseof
the nominal output voltage, the value of the resistor should be
(
)
Rtrim‑up = 5.11VOUT(100+∆%) _ 511 _10.22 (kW)
1.225∆%
∆%
where
VOUT=NominalOutputVoltage
FigureCgraphstherelationshipbetweenthetrimresistorvalue
andRtrim-upandRtrim-down,showingthetotalrangetheoutput
voltage can be trimmed up or down.
Trim Resistance (kOhms)
100,000
10,000
48 V
5.0 V
20 A
Quarter-brick
PROTECTIONFEATURES
Input Under-Voltage Lockout:Theconverterisdesignedtoturn
off when the input voltage is too low, helping avoid an input system
instability problem, described in more detail in the application note
titled“InputSystemInstability”.Thelockoutcircuitryisacomparator with DC hysteresis. When the input voltage is rising, it must
exceed the typical Turn-On Voltage Threshold value (listed on the
specificationpage)beforetheconverterwillturnon.Oncetheconverterison,theinputvoltagemustfallbelowthetypicalTurn-Off
VoltageThresholdvaluebeforetheconverterwillturnoff.
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
voltagedropbelowthespecifiedOutputDCCurrent-LimitShutdown
Voltage,theconverterturnsoff.
The converter then enters a “hiccup mode” where it repeatedly
turnsonandoffata5Hz(nominal)frequencywitha5%dutycycle
until the short circuit condition is removed. This prevents excessive
heating of the converter or the load board.
Output Over-Voltage Limit:Ifthevoltageacrosstheoutputpins
exceedstheOutputOver-VoltageProtectionthreshold,theconverter
will immediately stop switching. This prevents damage to the load
circuitdueto1)excessiveseriesresistanceinoutputcurrentpath
fromconverteroutputpinstosensepoint,2)areleaseofashortcircuit 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
thetemperatureatthesensedlocationreachestheOver-Temperature
Shutdown value. It will allow the converter to turn on again when the
temperatureofthesensedlocationfallsbytheamountoftheOverTemperatureShutdownRestartHysteresisvalue.
1,000
100
10
0
2
4
6
8
% increase Vout
10
12
14
16
18
20
% decrease Vout
Figure C: Trim Graph for 5.0 Vout 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.
Total DC Variation of Vout: For the converter to meet its full
specifications,themaximumvariationoftheDCvalueofVout,dueto
both trimming and remote load voltage drops, should not be greater
than that specified for the output voltage trim range.
Product # PQ60050QGA20
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07/15/09
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Input:
Output:
Current:
Package:
Technical Specification
APPLICATIONCONSIDERATIONS
Input System Instability: This condition can occur because any
DC/DCconverterappearsincrementallyasanegativeresistance
load.Adetailedapplicationnotetitled“InputSystemInstability”
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.
Application Circuits: Figure D below provides a typical circuit
diagram which details the input filtering and voltage trimming.
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 input electrolytic
capacitor. The recommended external input capacitance is specified
inthe“InputCharacteristics”section.Moredetailedinformationis
availableintheapplicationnotetitled“EMICharacteristics”onthe
SynQor website.
Startup Inhibit Period: The Startup Inhibit Period ensures that
the converter will remain off for approximately 200ms when it is
shutdownforanyreason.Whenanoutputshortispresent,this
generatesa5Hz“hiccupmode,”whichpreventstheconverterfrom
overheating. In all, there are seven ways that the converter can be
shutdown,initiatingaStartupInhibitPeriod:
•InputUnder-VoltageLockout
•InputOver-VoltageShutdown(notpresentinQuarter-brick)
•OutputOver-VoltageProtection
•OverTemperatureShutdown
•CurrentLimit
•ShortCircuitProtection
•TurnedoffbytheON/OFFinput
Vin(+)
Vin
External
Input
Filter
ESR
≅ 1Ω
Vout(+)
Vsense(+)
Electrolytic
Capacitor
33µF
48 V
5.0 V
20 A
Quarter-brick
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 # PQ60050QGA20
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07/15/09
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Input:
Output:
Current:
Package:
Technical Specification
48 V
5.0 V
20 A
Quarter-brick
FigureFshowsthreeturn-onscenarios,whereaStartupInhibit
Period is initiated at t0, t1, and t2:
At time t1,theunitisdisabledbytheON/OFFpin,anditcannot
be enabled again until the Startup Inhibit Period has elapsed.
Before time t0,whentheinputvoltageisbelowtheUVLthreshold,theunitisdisabledbytheInputUnder-VoltageLockoutfeature.WhentheinputvoltagerisesabovetheUVLthreshold,the
Input Under-Voltage Lockout is released, and a Startup Inhibit
Periodisinitiated.Attheendofthisdelay,theON/OFFpinis
evaluated, and since it is active, the unit turns on.
When the ON/OFF pin goes high after t2, the Startup Inhibit
Period has elapsed, and the output turns on within the typical
Turn-OnTime.
Vin
Under-Voltage
Lockout Turn-On
Threshold
ON/OFF
(pos logic)
ON
Vout
OFF
OFF ON
ON
4ms (typical
turn on time)
200ms
(typical start-up
inhibit period)
200ms
200ms
t1
t0
t
t2
Figure F: Startup Inhibit Period (turn-on time not to scale)
Product # PQ60050QGA20
Phone 1-888-567-9596
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Doc.# 005-2QG650D Rev. E
07/15/09
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Input:
Output:
Current:
Package:
Technical Specification
48 V
5.0 V
20 A
Quarter-brick
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 0 0 5 0Q GA 2 0 N K S - G
6/6 RoHS
Options (see
Ordering Information)
Output Current
Thermal Design
Performance Level
Package Size
Output Voltage
Input Voltage
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.
Model Number
Input Voltage
Output Voltage
PQ60015QGA25xyz-G
PQ60018QGA25xyz-G
PQ60020QGA25xyz-G
PQ60025QGA25xyz-G
PQ60033QGA25xyz-G
PQ60050QGA20xyz-G
PQ60060QGA17xyz-G
PQ60120QGA08xyz-G
PQ60150QGA07xyz-G
PQ60180QGA06xyz-G
PQ65180QGA06xyz-G
35 - 75 V
35 - 75 V
35 - 75 V
35 - 75 V
35 - 75 V
35 - 75 V
35 - 75 V
35 - 75 V
35 - 75 V
35 - 75 V
40 - 75 V
1.5 V
1.8 V
2.0 V
2.5 V
3.3 V
5.0 V
6.0 V
12 V
15 V
18 V
18 V
The following options must be included in place of the w x y z
spaces in the model numbers listed above.
Options Description: x y z
Application Notes
Enable Logic
Pin Style
Feature Set
P - Positive
N - Negative
K - 0.110"
N - 0.145"
R - 0.180"
Y - 0.250"
S - Standard
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]
Maximum
Output Current
25 A
25 A
25 A
25 A
25 A
20 A
16.7 A
8.3 A
6.7 A
5.6 A
5.6 A
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 U.S. patents, one or more of
which apply to this product. Additional patent applications
may be pending or filed in the future.
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
Contact SynQor for further information:
Phone:
Toll Free:
Fax:
E-mail:
Web:
Address:
Product # PQ60050QGA20
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
Warranty
SynQor offers a three (3) year limited warranty. Complete warranty informa‑
tion 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.# 005-2QG650D Rev. E
07/15/09
Page 13
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