20A/66W

Technical
S pecification
PQ30033EGA20
18-60V 3.3Vout
Input
20Amp
2000Vdc
Eighth-brick
Current
Isolation
DC/DC Conver ter
Output
T h e P Q 3 0 0 3 3 E G A 2 0 P o w e r Qor ® M e g a e i g h t h - b r i c k
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 13).
Operational Features
• High efficiency, 85% at full rated load current
• Delivers up to 20 amps of output current with minimal
derating - no heatsink required
• Wide input voltage range: 18V – 60V, with 80V
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 eighth-brick pin-out configuration
• Industry standard size: 0.90” x 2.3” (22.9x58.4mm)
• Total height only 0.335” (8.5mm), permits better airflow
and smaller card pitch
• Total weight: 0.68 oz. (19 grams)
• Flanged pins designed to permit surface mount soldering (avoid wave solder) using FPiP technique
Contr ol 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 # PQ30033EGA20
Phone 1-888-567-9596
www.synqor.com
PQ30033EGA20 Module
Pr otection Features
• 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
Safety Features
• 2000V, 30MΩ input-to-output isolation provides
input/output ground separation
• UL/cUL 60950-1 recognized (US & Canada)
• 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
Doc.# 005-2EG33MU Rev. A
3/18/08
Page 1
Input:
Output:
Current:
Package:
Technical Specification
MECHANICAL
DIAGRAM
18-60 V
3.3 V
20 A
Eighth-brick
2.30
(58.42)
0.300
0.14
0.150
(7.62)
(3.56)
2.00
(3.81)
0.150
(50.8)
(3.81)
0.450
0.600
(11.43)
(15.24)
Top View
0.90
(22.86)
0.600
0.300
(15.24)
(7.62)
0.335
Side View
(8.5)
Bottom side
Clearance
0.019 +0.013
(0.48 +0.33)
Lowest
Component
Load Board
Flanged Pin
See Note 9
0.110
(2.79)
See Note 3
PIN DESIGNATIONS
NOTES
1) Pins 1-3, 5-7 are 0.040” (1.02mm) diameter. with
Pin No. Name
Function
0.080” (2.03mm) diameter standoff shoulders.
1
Vin(+)
Positive input voltage
2) Pins 4 and 8 are 0.062” (1.57 mm) diameter with
0.100” (2.54 mm) diameter standoff shoulders.
2
ON/OFF
TTL input to turn converter
3) Other pin extension lengths available. Recommended pin
on and off, referenced to
length is 0.03” (0.76mm) greater than the PCB thickness.
Vin(-), with internal pull up.
4) All Pins: Material - Copper Alloy
3
Vin(-)
Negative input voltage
Finish (RoHS 5/6) - Tin/Lead over Nickel plate
4
Vout(-)
Negative output voltage
Finish (RoHS 6/6) - Matte Tin over Nickel plate
5
SENSE(-)
Negative remote sense1
5) Undimensioned components are shown for visual reference only.
6) All dimensions in inches (mm)
6
TRIM
Output voltage trim2
Tolerances: x.xx +/-0.02 in. (x.x +/-0.5mm)
7
SENSE(+)
Positive remote sense3
x.xxx +/-0.010 in. (x.xx +/-0.25mm)
8
Vout(+)
Positive output voltage
7) Weight: 0.68 oz. (19 g) typical
8) Workmanship: Meets or exceeds IPC-A-610C Class II
Notes:
9) The flanged pins are designed to permit surface mount
soldering (allowing to avoid the wave soldering process)
1. SENSE(–) should be connected to Vout(–) either remotely or at the converter.
through the use of the flanged pin-in-paste technique.
2. Leave TRIM pin open for nominal output voltage.
3. SENSE(+) should be connected to Vout(+) either remotely or at the converter.
Product # PQ30033EGA20
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-2EG33MU Rev. A
3/18/08
Page 2
Input:
Output:
Current:
Package:
Technical Specification
18-60 V
3.3 V
20 A
Eighth-brick
PQ30033EGA20 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.
Max.
Units
80
60
80
2000
100
125
18
V
V
V
V
°C
°C
V
Notes & Conditions
ABSOLUTE MAXIMUM RATINGS
Input Voltage
Non-Operating
Operating
Operating Transient Protection
Isolation Voltage (input to output)
Operating Temperature
Storage Temperature
Voltage at ON/OFF input pin
INPUT CHARACTERISTICS
Operating Input Voltage Range
Input Under-Voltage Lockout
Turn-On Voltage Threshold
Turn-Off Voltage Threshold
Lockout Voltage Hysteresis
Maximum Input Current
No-Load Input Current
Disabled Input Current
Inrush Current Transient Rating
Response to Input Transient
Input Reflected Ripple Current
Input Terminal Ripple Current
Recommended Input Fuse
Input Filter Component Values (C\L)
Recommended External Input Capacitance
OUTPUT CHARACTERISTICS
Output Voltage Set Point
Output Voltage Regulation
Over Line
Over Load
Over Temperature
Total Output Voltage Range
Output Voltage Ripple and Noise1
Peak-to-Peak
RMS
Operating Output Current Range
Output DC Current-Limit Inception
Output DC Current-Limit Shutdown Voltage
Back-Drive Current Limit while Enabled
Back-Drive Current Limit while Disabled
Maximum Output Capacitance
DYNAMIC CHARACTERISTICS
-40
-55
-2
18
24\48
60
V
15.7
14.1
2.5
16.6
15.0
3.5
17.5
15.9
4.5
4.5
60
7
0.01
V
V
V
A
mA
mA
A 2s
mV
mA
mA
A
µF\µH
µF
40
4
150
3
420
2.2\1.5
47
3.267
3.207
0
21.5
Input Voltage Ripple Rejection
Output Voltage during Load Current Transient
For a Step Change in Output Current (0.1A/µs)
For a Step Change in Output Current (5A/µs)
Settling Time
Turn-On Transient
Turn-On Time
Start-Up Inhibit Time
180
Output Voltage Overshoot
EFFICIENCY
100% Load 24Vin
50% Load 24Vin
100% Load 48Vin
50% Load 48Vin
TEMPERATURE LIMITS FOR POWER DERATING CURVES
Semiconductor Junction Temperature
Board Temperature
Transformer Temperature
ISOLATION CHARACTERISTICS
Isolation Voltage (dielectric strength)
Isolation Resistance
Isolation Capacitance2
3.300
20
3.333
+0.05 \ 2 +0.15 \ 5
+0.05 \ 2 +0.15 \ 5
+17
+50
3.393
70
15
24
2.4
0.5
10
130
25
20
26.5
50
20,000
Continuous
Continuous
100ms transient, square wave
Basic insulation, Pollution Degree 2
100% Load, 18 Vin
1000V/ms input transient
RMS thru 10µH inductor; Figures 17 & 19
RMS; Figures 17 & 18
Fast blow external fuse recommended
Internal values; see Figure E
Typical ESR 0.1-0.2Ω; see Figure 17
V
%\mV
%\mV
mV
V
mV
mV
A
A
V
A
mA
µF
Over sample, line, load, temperature & life
20MHz bandwidth; Figures 17 & 20
Full Load; Figures 17 & 20
Full Load; Figures 17 & 20
Subject to thermal derating; Figures 5 - 12
Output Voltage 10% Low; Figure 21
Negative current drawn from output
Negative current drawn from output
3.3Vout at 15A Resistive Load
70
dB
120 Hz; Figure 24
150
150
800
mV
mV
µs
50% to 75% to 50% Iout max; Figure 15
50% to 75% to 50% Iout max; Figure 16
To within 1% Vout nom
ms
ms
%
Full load, Vout=90% nom.; Figures 13 & 14
-40°C to +125°C; Figure F
20,000 µF load capacitance, Iout = 0A
%
%
%
%
Figures
Figures
Figures
Figures
°C
°C
°C
Package rated to 150°C
UL rated max operating temp 130°C
See Figures 5 - 12 for derating curves
9
200
0
13
240
85.0
87.
82.0
83.5
125
125
125
2000
30
470
1
1
1
1
-
4
4
4
4
V
MΩ
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 # PQ30033EGA20
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-2EG33MU Rev. A
3/18/08
Page 3
Input:
Output:
Current:
Package:
Technical Specification
18-60 V
3.3 V
20 A
Eighth-brick
ELECTRICAL CHARACTERISTICS (Continued)
Parameter P
FEATURE CHARACTERISTICS
Switching Frequency
ON/OFF Control (Option P)
Off-State Voltage
On-State Voltage
ON/OFF Control (Option N)
Off-State Voltage
On-State Voltage
ON/OFF Control (Either Option)
Pull-Up Voltage
Pull-Up Resistance
Output Voltage Trim Range
Output Voltage Remote Sense Range
Output Over-Voltage Protection
Over-Temperature Shutdown
Over-Temperature Shutdown Restart Hysteresis
Load Current Scale Factor
Min.
Typ.
Max.
Units
260
290
320
kHz
-2
2.4
0.8
18
V
V
2.4
-2
18
0.8
V
V
9.2
V
kΩ
%
%
%
°C
°C
-10
Vin/6.5
40
117
RELIABILITY CHARACTERISTICS
Calculated MTBF (Telcordia)
Calculated MTBF (MIL-217)
Field Demonstrated MTBF
122
125
10
800
+10
+10
127
Notes & Conditions
Buck stage and isolation stage
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
6
2.4
1.4
STANDARDS COMPLIANCE
Parameter P
Notes
STANDARDS COMPLIANCE
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
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
PATENTS
SynQor provides various options for this family of dc-dc converters.
Please consult the last page for additional information.
SynQor is protected under various patents. Please consult the
last page for further details.
Product # PQ30033EGA20
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-2EG33MU Rev. A
3/18/08
Page 4
Input:
Output:
Current:
Package:
Technical Specification
100
18-60 V
3.3 V
20 A
Eighth-brick
87.0
95
86.8
90
Efficiency (%)
Efficiency (%)
85
80
75
70
18 Vin
24 Vin
48 Vin
60 Vin
65
86.6
86.4
25 ºC
40 ºC
55 ºC
86.2
60
86.0
0
4
8
12
16
20
100
200
Load Current (A)
300
400
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).
15
7.0
14
11
Power Dissipation (W)
Power Dissipation (W)
13
12
10
9
8
7
6
5
4
18 Vin
24 Vin
48 Vin
60 Vin
3
2
1
6.0
5.0
4.0
25 ºC
40 ºC
55 ºC
0
3.0
0
1
2
3
4
5
6
7
8
9 10 11 12 13 14 15 16 17 18 19 20
100
Load Current (A)
200
300
400
Air Flow (LFM)
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).
22
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)
2
100 LFM (0.5 m/s)
Semiconductor junction temperature is
within 1°C of surface temperature
0
25
40
55
70
85
Ambient Air Temperature (°C)
Figure 5: Maximum output power derating curves vs. ambient air temperature for airflow rates of 100 LFM through 400 LFM with air flowing across the converter from pin 3 to pin 1 (24V input voltage).
Product # PQ30033EGA20
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Figure 6: Thermal plot of converter at 17.7 amp load current with 55°C
air flowing at the rate of 200 LFM. Air is flowing across the converter
sideways from pin 3 to pin 1 (24V input voltage).
www.synqor.com
Doc.# 005-2EG33MU Rev. A
3/18/08
Page 5
Input:
Output:
Current:
Package:
Technical Specification
18-60 V
3.3 V
20 A
Eighth-brick
22
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)
2
100 LFM (0.5 m/s)
Semiconductor junction temperature is
within 1°C of surface temperature
0
25
40
55
70
85
Ambient Air Temperature (°C)
Figure 7: Maximum output power derating curves vs. ambient air temperature for airflow rates of 100 LFM through 400 LFM with air flowing across the converter from pin 3 to pin 1 (48V input voltage).
Figure 8: Thermal plot of converter at 16.3 amp load current with 55°C
air flowing at the rate of 200 LFM. Air is flowing across the converter
sideways from pin 3 to pin 1 (48V input voltage).
22
20
18
Iout (A)
16
14
12
10
8
400 LFM (2.0 m/s)
6
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
4
100 LFM (0.5 m/s)
Semiconductor junction temperature is
within 1°C of surface temperature
2
25
40
55
70
85
Ambient Air Temperature (°C)
Figure 9: Maximum output power-derating curves vs. ambient air temperature for airflow rates of 100 LFM through 400 LFM with air flowing from input to output (24V input voltage).
Figure 10: Thermal plot of converter at 17.4 amp load current with
55°C air flowing at the rate of 200 LFM. Air is flowing across the converter from input to output (24V input voltage).
22
20
18
Iout (A)
16
14
12
10
8
400 LFM (2.0 m/s)
6
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
4
100 LFM (0.5 m/s)
Semiconductor junction temperature is
within 1°C of surface temperature
2
25
40
55
70
85
Ambient Air Temperature (°C)
Figure 11: Maximum output power-derating curves vs. ambient air temperature for airflow rates of 100 LFM through 400 LFM with air flowing from input to output (48V input voltage).
Product # PQ30033EGA20
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Figure 12: Thermal plot of converter at 14.5 amp load current with
55°C air flowing at the rate of 200 LFM. Air is flowing across the converter from input to output (48V input voltage).
www.synqor.com
Doc.# 005-2EG33MU Rev. A
3/18/08
Page 6
Input:
Output:
Current:
Package:
Technical Specification
18-60 V
3.3 V
20 A
Eighth-brick
Figure 13: Turn-on transient at full load (resistive load) (5 ms/div).
Input voltage pre-applied. Ch 1: Vout (1V/div). Ch 2: ON/OFF input
(5V/div)
Figure 14: Turn-on transient at zero load (5 ms/div).
Ch 1: Vout (1V/div)
Ch 2: ON/OFF input (5V/div)
Figure 15: Output voltage response to step-change in load current (50%-75%-50%
of Iout(max); dI/dt = 0.1A/µs). Load cap: 10µF, 100 mΩ ESR tantalum capacitor
and 1µF ceramic capacitor. Ch 1: Vout (200mV/div), Ch 2: Iout (5A/div).
Figure 16: 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. Ch 1: Vout (200mV/div), Ch 2: Iout (5A/div).
See Fig. 15
10 µH
See Fig. 14
source
impedance
See Fig. 16
iS
VSOURCE
iC
47 µF,
<1Ω ESR
electrolytic
capacitor
DC/DC
Converter
VOUT
1 µF
10 µF,
ceramic 100mΩ ESR
capacitor
tantalum
capacitor
Figure 17: Test set-up diagram showing measurement points for Input
Terminal Ripple Current (Figure 18), Input Reflected Ripple Current
(Figure 19) and Output Voltage Ripple (Figure 20).
Product # PQ30033EGA20
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Figure 18: Input Terminal Ripple Current, ic, at full rated output current and nominal input voltage with 10µ H source impedance and 47µ F
electrolytic capacitor (500 mA/div). See Figure 17.
Doc.# 005-2EG33MU Rev. A
3/18/08
Page 7
Input:
Output:
Current:
Package:
Technical Specification
Figure 19: Input reflected ripple current, is, through a 10 µ H source
inductor at nominal input voltage and rated load current (5 mA/div).
See Figure 17.
18-60 V
3.3 V
20 A
Eighth-brick
Figure 20: Output voltage ripple at nominal input voltage and rated
load current (50 mV/div). Load capacitance: 1µ F ceramic capacitor
and 10µ F tantalum capacitor. Bandwidth: 20 MHz. See Figure 17.
3.5
3
Output Voltage (V)
2.5
2
1.5
1
18 Vin
0.5
24 Vin
48 Vin
60Vin
0
0
2
4
6
8
10
12
14
16
18
20
22
24
Load Current (A)
Figure 21: Output voltage vs. load current showing typical current limit
curves and converter shutdown points.
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Figure 22: Load current (10A/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.# 005-2EG33MU Rev. A
3/18/08
Page 8
Input:
Output:
Current:
Package:
Technical Specification
0.1
18-60 V
3.3 V
20 A
Eighth-brick
-20
Forward Transmission (dB)
Output Impedance (ohms)
-30
0.01
0.001
35 Vin
48 Vin
-40
-50
-60
-70
-80
35 Vin
-90
48 Vin
75 Vin
-100
0.0001
75 Vin
-110
10
100
1,000
10,000
100,000
10
100
Hz
1,000
10,000
100,000
Hz
Figure 23: Magnitude of incremental output impedance (Zout =
vout/iout) for minimum, nominal, and maximum input voltage at full
rated power.
Figure 24: Magnitude of incremental forward transmission (FT =
vout/vin) for minimum, nominal, and maximum input voltage at full
rated power.
0
1000
-10
Input Impedance (ohms)
Reverse Transmission (dB)
-5
-15
-20
-25
-30
-35
35 Vin
-40
100
10
35 Vin
1
48 Vin
48 Vin
-45
75 Vin
75 Vin
0.1
-50
10
100
1,000
10,000
10
100,000
Hz
Phone 1-888-567-9596
1,000
10,000
100,000
Hz
Figure 25: Magnitude of incremental reverse transmission
(RT = iin/iout) for minimum, nominal, and maximum input voltage at
full rated power.
Product # PQ30033EGA20
100
Figure 26: Magnitude of incremental input impedance (Zin = vin/iin)
for minimum, nominal, and maximum input voltage at full rated
power.
www.synqor.com
Doc.# 005-2EG33MU Rev. A
3/18/08
Page 9
Input:
Output:
Current:
Package:
Technical Specification
18-60 V
3.3 V
20 A
Eighth-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 eighth-brick, quarter-brick and half-brick
converters uses the industry standard footprint and pin-out configuration.
In the positive logic version, the ON/OFF input is active high
(meaning that a high turns the converter on). In the negative logic
version, the ON/OFF signal is active low (meaning that a low
turns the converter on). Figure A details five possible circuits for
driving the ON/OFF pin. Figure B is a detailed look of the internal ON/OFF circuitry.
REMOTE SENSE(+) (Pins 7 and 5): The SENSE(+) inputs correct for voltage drops along the conductors that connect the converter’s output pins to the load.
Pin 7 should be connected to Vout(+) and Pin 5 should be connected to Vout(-) at the point on the board where regulation is
desired. A remote connection at the load can adjust for a voltage
drop only as large as that specified in this datasheet, that is
[Vout(+) - Vout(-)] – [Vsense(+) - Vsense(-)] <
Sense Range % x Vout
Pins 7 and 5 must be connected for proper regulation of the output voltage. If these connections are not made, the converter will
deliver an output voltage that is slightly higher than its specified
value. The converter has 100Ω internal resistors connected
between the output and sense pins (see diagram below).
Vout(+)
100
ON/OFF
Vsense(+)
ON/OFF
ON/OFF
Vsense(_)
100
Vout(_)
Remote Enable Circuit
Vin(_)
Vin(_)
Vin(_)
Negative Logic
(Permanently Enabled)
ON/OFF
Positive Logic
(Permanently Enabled)
ON/OFF
ON/OFF
Vin(_)
Vin(_)
50k
TTL
100pF
50k
Vin(_)
Direct Logic Drive
Figure A: Various circuits for driving the ON/OFF pin.
Product # PQ30033EGA20
5V
162k
5V
TTL/
CMOS
Open Collector Enable Circuit
Vin(+)
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Figure B: Internal ON/OFF pin circuitry
Doc.# 005-2EG33MU Rev. A
3/18/08
Page 10
Input:
Output:
Current:
Package:
Technical Specification
Note: the output over-voltage protection circuit senses the voltage
across the output (pins 8 and 4) to determine when it should trigger, not the voltage across the converter’s sense leads (pins 7
and 5). Therefore, the resistive drop on the board should be
small enough so that output OVP does not trigger, even during
load transients.
OUTPUT VOLTAGE TRIM (Pin 6): The TRIM input permits the
user to adjust the output voltage across the sense leads up or
down according to the trim range specifications.
To decrease the output voltage, the user should connect a resistor
between Pin 6 and Pin 5 (SENSE(-) input). For a desired decrease
of the nominal output voltage, the value of the resistor should be
Rtrim-down =
- 10.22
(511
∆%)
(kΩ)
where
∆% =
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+∆%) _ 511 _
10.22
1.225∆%
∆%
)
(kΩ)
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)
10,000.0
18-60 V
3.3 V
20 A
Eighth-brick
Note: the TRIM feature does not affect the voltage at which the
output over-voltage protection circuit is triggered. Trimming the
output voltage too high may cause the over-voltage protection circuit to engage, particularly during transients.
It is not necessary for the user to add capacitance at the Trim pin.
The node is internally bypassed to eliminate noise.
Total DC Variation of Vout: For the converter to meet its full
specifications, the maximum variation of the DC value of Vout,
due to both trimming and remote load voltage drops, should not
be greater than that specified for the output voltage trim range.
PROTECTION FEATURES
Input Under-Voltage Lockout: The converter is designed to
turn off when the input voltage is too low, helping avoid an input
system instability problem, described in more detail in the application note titled “Input System Instability”. The lockout circuitry
is a comparator with DC hysteresis. When the input voltage is rising, it must exceed the typical Turn-On Voltage Threshold value
(listed on the specification page) before the converter will turn
on. Once the converter is on, the input voltage must fall below
the typical Turn-Off Voltage Threshold value before the converter
will turn off.
Output Current Limit: The maximum current limit remains constant as the output voltage drops. However, once the impedance
of the short across the output is small enough to make the output
voltage drop below the specified Output DC Current-Limit
Shutdown Voltage, the converter turns off.
The converter then enters a “hiccup mode” where it repeatedly
turns on and off at a 5 Hz (nominal) frequency with a 5% duty
cycle until the short circuit condition is removed. This prevents
excessive heating of the converter or the load board.
Output Over-Voltage Limit: If the voltage across the output
pins exceeds the Output Over-Voltage Protection threshold, the
converter will immediately stop switching. This prevents damage
to the load circuit due to 1) excessive series resistance in output
current path from converter output pins to sense point, 2) a
release of a short-circuit condition, or 3) a release of a current
limit condition. Load capacitance determines exactly how high
the output voltage will rise in response to these conditions. After
200 ms the converter will automatically restart.
1,000.0
100.0
10.0
0
1
2
3
4
5
% Increase in Vout
6
7
8
9
10
% Decrease in Vout
Figure C: Trim Graph for 3.3Vout module
Product # PQ30033EGA20
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Doc.# 005-2EG33MU Rev. A
3/18/08
Page 11
Input:
Output:
Current:
Package:
Technical Specification
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 OverTemperature Shutdown value. It will allow the converter to turn on
again when the temperature of the sensed location falls by the
amount of the Over-Temperature Shutdown Restart Hysteresis
value.
APPLICATION CONSIDERATIONS
18-60 V
3.3 V
20 A
Eighth-brick
Application Circuits: Figure D provides a typical circuit diagram which details the input filtering and voltage trimming.
Input Filtering and External Capacitance: Figure E 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.
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.
Vin(+)
Vin
External
Input
Filter
47µF
Vout(+)
Vsense(+)
Electrolytic
Capacitor
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 the specifications page).
Product # PQ30033EGA20
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Doc.# 005-2EG33MU Rev. A
3/18/08
Page 12
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:
18-60 V
3.3 V
20 A
Eighth-brick
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.
• Input Under-Voltage Lockout
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.
• Input Over-Voltage Shutdown (not present in Eighth-brick)
• Output Over-Voltage Protection
• Over Temperature Shutdown
• Current Limit
• Short Circuit Protection
• Turned off by the ON/OFF input
Figure F shows three turn-on scenarios, where a Startup Inhibit
Period is initiated at t0, t1, and t2:
Before time t0, when the input voltage is below the UVL threshold,
the unit is disabled by the Input Under-Voltage Lockout feature.
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 available as
5/6 RoHS compliant (product with lead) or 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]
Vin
Under-Voltage
Lockout Turn-On
Threshold
ON/OFF
(pos logic)
ON
OFF
OFF ON
ON
9ms (typical
turn on time)
Vout
200ms
(typical start-up
inhibit period)
t1
t0
200ms
200ms
t
t2
Figure F: Startup Inhibit Period (turn-on time not to scale)
Product # PQ30033EGA20
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Doc.# 005-2EG33MU Rev. A
3/18/08
Page 13
Input:
Output:
Current:
Package:
Technical Specification
18-60 V
3.3 V
20 A
Eighth-brick
PART NUMBERING SYSTEM
ORDERING INFORMATION
The part numbering system for SynQor’s PowerQor 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 3 characters for options. To
order 6/6 RoHS compliant product please add a “-G” suffix.
PQ 30 033 E G A 20 N N S
Options
(see
Ordering Information)
Output Current
Thermal Design/Profile
Performance Level
Package Size
Model Number
Input Voltage
PQ30033EGA20xyz -G
18 - 60 V
Output Max Output
Voltage
Current
3.3 V
20 A
The following option choices must be included in place of the
x y z spaces in the model numbers listed above.
Output Voltage
Input Voltage
Product Family
Options Description: x y z
Enable
Logic
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. A “-G” suffix indicates 6/6 RoHS compliance.
P - Positive
N - Negative
Pin
Length
K - 0.110"
N - 0.145"
R - 0.180"
Y - 0.250"
Feature
Set
S - Standard
A - Tight Accuracy
Application Notes
A variety of application notes and technical white papers can
be downloaded in pdf format from our website.
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
Contact SynQor for further information:
Phone:
Toll Free:
Fax:
E-mail:
Web:
Address:
Product # PQ30033EGA20
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
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.# 005-2EG33MU Rev. A
3/18/08
Page 14
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