20A/66W

Technical
Specification
PQ60033EGx20
48V
3.3V
20A
2000Vdc
Eighth-brick
Input
Output
Current
Isolation
DC-DC Converter
The PQ60033EGx20 PowerQor® Giga eighth-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. RoHS compliant
(see page 12).
PQ60033EGL20 Module
Operational Features
Protection Features
• High efficiency, 89% at half load, >87% at full load
• Delivers up to 20 amps of output current (66W) with minimal
derating - no heatsink required
• Wide input voltage range: 35V – 75V, with 100V 100ms input voltage
transient capability
• Fixed frequency switching provides predictable EMI performance
• No minimum load requirement means no preload resistors required
• 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
Mechanical Features
Safety Features
• Industry standard eighth-brick pin-out configuration
• Industry standard size: 0.90" x 2.3" (22.9x58.4 mm)
• Total height of the EGL is only 0.340" (8.64 mm), permitting better
airflow and smaller card pitch
•2000V, 30 MW input-to-output isolation provides input/output
ground separation
• UL 60950-1 recognized (US & Canada), basic insulation rating
• Total weight: 0.68 oz (19 g)
• TUV certified to EN60950-1
• Open frame units have flanged pins designed to permit surface
mount soldering (avoid wave solder) using FPiP technique
• 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
Control Features
Contents
• 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 # PQ60033EGx20
Phone 1-888-567-9596
Page No.
Mechanical Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
PQ60033EGx20 ELECTRICAL CHARACTERISTICS . . . . . . . . . . . . . . . 3-4
Standards and Qualification Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Figures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-8
Applications Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-12
Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
www.synqor.com
Doc.# 005-0005349 Rev. A
09/23/09
Page 1
Input:
Output:
Current:
Package:
Technical Specification
35-75 V
3.3 V
20 A
Eighth-brick
MECHANICAL DIAGRAM
Top View
Side View
0.90(22.86)
0.600 (15.24)
0.450 (11.43)
EGL max height
340 ± 014
.
(8.64 ±0.35)
EGA max height
0.410 ± .014 (10.41)
See Note 9
0.300 (7.62)
0.150 (3.81)
0.145 (3.68)
See Note 3
87654
0.110 (2.79)
See Note 3
2.00
(50.8)
2.30
(58.42)
0.14
(3.56)
1
2
0.150
(3.81)
0.300 (7.62)
0.600 (15.24)
PIN FAR SIDE
TYPICAL
SEE NOTES
1, 2, & 3
NOTES
PIN DESIGNATIONS
1) Pins 1-3, 5-7 are 0.040” (1.02mm) diameter. with 0.080”
(2.03mm) 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” (0.76mm) greater than the PCB thickness.
4) All Pins: Material: Copper Alloy
Finish (RoHS 6/6) - 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: 0.68 oz. (19 g) typical
8) Workmanship: Meets or exceeds IPC-A-610C Class II
9) Modules can be ordered as EGA option that have different
pins to provide a minimum bottom side clearance of 0.076”
while increasing maximum height to 0.424”. See ordering
page for more information.
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 # PQ60033EGx20
EGL
Bottom side
min clearance
.019 ±.013
(0.48 ±0.33)
EGA
Bottom side
min clearance
0.089±.013
(2.26)
See Note 9
3
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. 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.# 005-0005349 Rev. A
09/23/09
Page 2
Input:
Output:
Current:
Package:
Technical Specification
35-75 V
3.3 V
20 A
Eighth-brick
PQ60033EGx20 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 Voltage Hysteresis
2.5
3.5
4.5
Maximum Input Current
2.6
No-Load Input Current
40
60
Disabled Input Current
1.6
4
Inrush Current Transient Rating
0.01
Response to Input Transient
250
Input Reflected Ripple Current
3
Input Terminal Ripple Current
90
Recommended Input Fuse
20
Input Filter Component Values (L\C)
3.3\2.2
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
100% Load, 35 Vin
1000V/ms input transient
RMS thru 10µH inductor; Figures 13 & 15
RMS; Figures 13 & 14
Fast blow external fuse recommended
Internal values; Figure E
Typical ESR 0.1-0.2W; Figure 13
Output Voltage Set Point
3.267
3.300
3.333
V
Output Voltage Regulation
+
+
Over Line
0.05 \ 2 0.15 \ 5 %\mV
+0.05 \ 2 +0.15 \ 5 %\mV
Over Load
+17
+50
Over Temperature
mV
Total Output Voltage Range
3.207
3.393
V
Over sample, line, load, temperature & life
1
Output Voltage Ripple and Noise 20MHz bandwidth; Figures 13 & 16
Peak-to-Peak
70
130
mV
Full Load; Figures 13 & 16
RMS
15
25
mV
Full Load; Figures 13 & 16
Operating Output Current Range
0
20
A
Subject to thermal derating; Figures 5 - 8
Output DC Current-Limit Inception
21
22.5
25
A
Output Voltage 10% Low; Figure 17
Output DC Current-Limit Shutdown Voltage
2.0
V
Back-Drive Current Limit while Enabled
0.5
A
Negative current drawn from output
Back-Drive Current Limit while Disabled
10
50
mA
“
Maximum Output Capacitance
10,000
µF
3.3Vout at 20A Resistive Load
DYNAMIC CHARACTERISTICS
Input Voltage Ripple Rejection
65
dB
Output Voltage during Load Current Transient
For a Step Change in Output Current (0.1A/µs)
90
mV
For a Step Change in Output Current (5A/µs)
100
mV
Settling Time
400
µs
Turn-On Transient
Turn-On Time
9
13
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
87.5
89
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
10,000 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 # PQ60033EGx20
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0005349 Rev. A
09/23/09
Page 3
Input:
Output:
Current:
Package:
Technical Specification
35-75 V
3.3 V
20 A
Eighth-brick
ELECTRICAL CHARACTERISTICS (Continued)
Parameter P
Min.
Typ.
Max.
Units Notes & Conditions
FEATURE CHARACTERISTICS
Switching Frequency
242
285
327
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
400
RELIABILITY CHARACTERISTICS
Regulation and Isolation stages
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
See web 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
Calculated MTBF (Telcordia)
2.5
Calculated MTBF (MIL-217)
1.1
Field Demonstrated MTBF
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.
OPTIONS
SynQor provides various options for Packaging, Enable Logic,
and Feature Set for this family of DC/DC converters. Please consult the last page for information on available options.
Product # PQ60033EGx20
Phone 1-888-567-9596
PATENTS
SynQor is protected under various patents. Please consult the
last page for further details.
www.synqor.com
Doc.# 005-0005349 Rev. A
09/23/09
Page 4
Input:
Output:
Current:
Package:
Technical Specification
95
92
90
91
90
Efficiency (%)
85
Efficiency (%)
35-75 V
3.3 V
20 A
Eighth-brick
80
75
70
89
88
87
86
25 C
85
55 C
40 C
35 Vin
48 Vin
75 Vin
65
84
60
0
2
4
6
8
10
12
14
16
18
0
20
100
200
300
400
500
Air Flow (LFM)
Load Current (A)
Figure 1: Efficiency at nominal output voltage vs. load current for minimum,
nominal, and maximum input voltage at 25°C.
Figure 2: Efficiency at nominal output voltage and 60% rated power vs.
airflow rate for ambient air temperatures of 25°C, 40°C, and 55°C (nominal
input voltage).
11
92
10
91
Power Dissipation (W)
9
90
Efficiency (%)
8
7
6
5
4
3
2
1
4
6
8
10
12
14
16
87
86
25 C
48 Vin
85
55 C
40 C
75 Vin
2
88
35 Vin
84
0
0
89
18
0
20
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).
20
18
16
Iout (A)
14
12
10
8
400 LFM (2.0 m/s)
6
300 LFM (1.5 m/s)
4
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
2
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 # PQ60033EGx20
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Figure 6: Thermal plot of converter at 19 amp load current (63W) 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.# 005-0005349 Rev. A
09/23/09
Page 5
Input:
Output:
Current:
Package:
Technical Specification
35-75 V
3.3 V
20 A
Eighth-brick
20
18
16
Iout (A)
14
12
10
8
400 LFM (2.0 m/s)
6
300 LFM (1.5 m/s)
4
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
2
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 7: Maximum output power-derating curves vs. ambient air temperature
for airflow rates of 50 LFM through 400 LFM with air flowing from input to
output (nominal input voltage).
Figure 8: Thermal plot of converter at 17 amp load current (57W) 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 (1V/div). Ch 2: ON/OFF input (5V/div)
Figure 10: Turn-on transient at zero load (10 ms/div). Ch 1: Vout (1V/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 cap
and 1µF ceramic cap. Ch 1: Vout (100mV/div), Ch 2: 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 cap
and 1µF ceramic cap. Ch 1: Vout (100mV/div), Ch 2: Iout (5A/div).
Product # PQ60033EGx20
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0005349 Rev. A
09/23/09
Page 6
Input:
Output:
Current:
Package:
Technical Specification
35-75 V
3.3 V
20 A
Eighth-brick
See Fig. 15
10 µH
See Fig. 14
source
impedance
See Fig. 16
iS
iC
VSOURCE
DC/DC
Converter
VOUT
10 µF,
1 µF
47 µF,
<1W ESR
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 (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 (5 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: 20 MHz. See Figure 13.
4.0
Output Voltage (V)
3.5
3.0
2.5
2.0
35 V
48 V
1.5
75 V
1.0
0
5
10
15
20
25
30
Load Current (A)
Figure 17: Output voltage vs. load current showing typical current limit curves
and converter shutdown points.
Product # PQ60033EGx20
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Figure 18: Load current (20A/div) as a function of time when the converter
attempts to turn on into a 10 mΩ short circuit. Top trace (2.0ms/div) is an
expansion of the on-time portion of the bottom trace.
www.synqor.com
Doc.# 005-0005349 Rev. A
09/23/09
Page 7
Input:
Output:
Current:
Package:
Technical Specification
35-75 V
3.3 V
20 A
Eighth-brick
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/iout) for
minimum, nominal, and maximum input voltage at full rated power.
Figure 21: Magnitude of incremental reverse transmission (RT = iin/iout) for
minimum, nominal, and maximum input voltage at full rated power.
Figure 22: Magnitude of incremental input impedance (Zin = vin/iin) for
minimum, nominal, and maximum input voltage at full rated power.
Product # PQ60033EGx20
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www.synqor.com
Doc.# 005-0005349 Rev. A
09/23/09
Page 8
Technical
Specification
PQ60033EGx20
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 polarity 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 eighth-brick, quarter-brick and half-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)
In the positive logic version, the ON/OFF input is active high
(a high turns the converter on). In the negative logic version, the
ON/OFF signal is active low (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 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.
Positive Logic
(Permanently Enabled)
5V
ON/OFF
TTL/
CMOS
ON/OFF
5V
Vin(+)
Vin(_)
Vin(_)
Open Collector Enable Circuit
274k
Direct Logic Drive
ON/OFF
Figure A: Various circuits for driving the ON/OFF pin.
50k
TTL
100pF
50k
Vin(_)
Figure B: Internal ON/OFF pin circuitry
Product # PQ60033EGx20
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Doc.# 005-0005349 Rev. A
09/23/09
Page 9
Technical
Specification
PQ60033EGx20
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 _
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)
10,000
1,000
100
10
1
0
1
2
3
4
5
6
7
8
9 10 11 12 13 14 15 16 17 18 19 20
% increase Vout
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” available on the
SynQor website. The lockout circuitry is a comparator with DC
hysteresis. When the input voltage is rising, it must exceed the
typical Turn-On Voltage Threshold value (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.
% decrease Vout
Figure C: Trim Graph for 3.3Vout 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, the maximum variation of the DC value of Vout,
due to both trimming and remote load voltage drops, should not
be greater than that specified for the output voltage trim range.
Product # PQ60033EGx20
Phone 1-888-567-9596
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Doc.# 005-0005349 Rev. A
09/23/09
Page 10
Technical
Specification
PQ60033EGx20
APPLICATION CONSIDERATIONS
Input System Instability: This condition can occur because
any DC/DC converter appears incrementally as a negative
resistance load. A detailed application note titled “Input
System Instability” is available on the SynQor website which
provides an understanding of why this instability arises, and
shows the preferred solution for correcting it.
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 Characteristics” 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
Vsense(+)
Electrolytic
Capacitor
47µF
ON/OFF
Trim
Vsense(_)
Vin(_)
Rtrim-up
or
Rtrim-down
Cload
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 # PQ60033EGx20
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Doc.# 005-0005349 Rev. A
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Page 11
Technical
Specification
PQ60033EGx20
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 Eighth-brick)
• Output Over-Voltage Protection
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
OFF ON
Vout
OFF
ON
9ms (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 # PQ60033EGx20
Phone 1-888-567-9596
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Doc.# 005-0005349 Rev. A
09/23/09
Page 12
Technical
Specification
PQ60033EGx20
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.
Input
Output
Max Output
Model Number
Voltage
Voltage
Current
PQ60010EGw20xyz
35 - 75V
1.0V
20A
PQ60010EGw25xyz
35 - 75V
1.0V
25A
PQ60012EGw20xyz
35 - 75V
1.2V
20A
PQ60012EGw25xyz
35 - 75V
1.2V
25A
PQ60015EGw20xyz
35 - 75V
1.5V
20A
PQ60015EGw25xyz
35 - 75V
1.5V
25A
PQ60018EGw20xyz
35 - 75V
1.8V
20A
PQ60018EGw25xyz
35 - 75V
1.8V
25A
PQ60025EGw20xyz
35 - 75V
2.5V
20A
PQ60025EGw25xyz
35 - 75V
2.5V
25A
PQ60033EGw20xyz
35 - 75V
3.3V
20A
PQ60050EGw15xyz
35 - 75V
5.0V
15A
PQ60120EGw07xyz
35 - 75V
12V
6.25A
PQ60150EGw05xyz
35 - 75V
15V
5.0A
PQ60300EGw03xyz
35 - 75V
24V
3.0A
PQ6 0 0 3 3 E G L 2 0 N N 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. Although there are no default values
for enable logic and pin length, the most common options are negative logic
and 0.145” pins. These part numbers are more likely to be readily available
in stock for evaluation and prototype quantities. The “-G” suffix indicates
6/6 RoHS compliance.
The following options must be included in place of the w x y z spaces in
the model numbers listed above. Modules above can be ordered with an
increased bottom side board clearance and a slightly larger total height (see
page 2 for dimensions). To order replace EGL in the part number with EGA. There are no other differences from the EGL units.
Application Notes
Options Description: w x y z
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].
Thermal Design
Enable Logic
Pin Style
Feature Set
A - Open Frame
L - Low Profile Open Frame
P - Positive
N - Negative
K - 0.110"
N - 0.145"
R - 0.180"
Y - 0.250”
S - Standard
See the technical addendum on the Product Selector web page for additional
specifications on the baseplated version of the PowerQor Mega & Giga
Eighth-brick series of converters.
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
each product listed in this brochure. Additional patent applications may
be pending or filed in the future.
Contact SynQor for further information:
Phone:
Toll Free:
Fax:
E-mail:
Web:
Address:
Product # PQ60033EGx20
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
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.# 005-0005349 Rev. A
09/23/09
Page 13