12A/144W

Technical
Specification
PQ60120QTx12
48V
35-75V
12V
144W
2000V dc
Quarter-brick
Input
Continuous Input
Output
Max Power
Isolation
DC/DC Converter
The PQ60120QTx12 PowerQor Tera quarter-brick
converter is a next-generation, board-mountable, isolated,
fixed switching frequency DC/DC converter that uses
synchronous rectification to achieve extremely high
conversion efficiency. The power dissipated by the converter
is so low that a heatsink is not required, which saves cost,
weight, height, and application effort. All of the power and
control components are mounted to the multi-layer PCB
substrate with high-yield surface mount technology. Since
the PowerQor converter has no explicit thermal interfaces,
it is extremely reliable. The Tera series offers the maximum
useable output current for any standard “quarter-brick”
module.
PQ60120QTx12 Module
Operational Features
• Ultra-high efficiency, 91% at full rated load current
• Delivers up to 12A of output current (144W) with minimal derating
- no heatsink required
• Wide input voltage range: 35V - 75V, with 100V 100ms
input voltage transient capability
• Fixed frequenc switching provides predictable EMI performance
• No minimum load requirement means no preload resistors required
Protection Features
• Input under-voltage lockout disables converter at low Vin 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 form damaging voltages
• Thermal shutdown protects converter from
Mechanical Features
Safety Features
• Industry standard quarter-brick pin-out
• Size: 1.45” x 2.3” (36.8x58.4mm), height: 0.43” (10.92mm)
• Total open frame weight: 1.5 oz (42 g)
•
•
•
•
Control Features
Contents
• On/Off control referenced to input side
(positive and negative logic options are available)
• Remote sense for the Vout compensates for output distribution drops
• Output voltage trim permits custom voltages and voltage margining
Product # PQ60120QTx12
UL 60950-1:2007
CAN/CSA-C22.2 No. 60950-1:2007
EN60950-1:A12:2011
IEC 61000-4-2
Phone 1-888-567-9596
Page No.
Mechanical Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Figures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Application Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
www.synqor.com
Doc.# 005-2QT612C Rev. C
07/24/12
Page 1
Input:
Output:
Current:
Package:
Open Frame Mechanical Diagram
1.45 [36.8]
.600
[15.24]
.450
[11.43]
.150 [3.81]
35-75V
12V
12A
Quarter-brick
.43 [10.9]
.300
[7.62]
.145 [3.68]
See Note 3
8 7 65 4
Top View
2.00 [50.8]
Side View
2.30 [58.4]
.14 [3.6]
1
2
3
.43 [10.9]
.300 [7.62]
.600 [15.24]
Pin Farside Typical
See Notes 1,2, and 4
NOTES
PIN DESIGNATIONS
1) Pins 1-3, 5-7 are 0.040” (1.02mm) diameter
with 0.080” (2.03 mm) diameter standoff shoulders.
2) Pins 4,8 are 0.062” (1.57 mm) diameter
with 0.100” (2.54 mm) diameter standoff shoulders.
3) Other pin lengths available.
4) All Pins: Material - Copper Alloy
Finish: Matte 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 +/-0.5mm)
x.xxx +/-0.010 in. (x.xx +/-0.25mm)
7) Weight: 1.5 oz (42 g) typical
8) Workmanship: Meets or exceeds IPC-A-610C Class II
9) UL/TUV standards require a clearance of 0.04” (1.02mm)
around primary areas of the module.
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 # PQ60120QTx12
.060+.022/-.32
[1.52+.55/-.81mm]
Bottomside
Clearance
Phone 1-888-567-9596
Pin
Name
1
2
3
4
5
6
7
8
Vin(+)
ON/OFF
Vin(–)
Vout(–)
Vout(+)
Vout(+)
Vout(+)
Vout(+)
Function
Positive input voltage
Logic control input to turn converter on/off.
Negative input voltage
Negative output voltage
Negative remote sense (see note 1)
Output voltage trim (see note 2)
Positive remote sense (see note 3)
Positive output voltage
Notes:
1. SENSE(-) may be connected to Vout(-) or left open.
2. Leave TRIM pin open for nominal output voltage.
3. SENSE(+) may be connected to Vout(+) or left open.
www.synqor.com
Doc.# 005-2QT612C Rev. C
07/24/12
Page 2
Input:
Output:
Current:
Package:
Baseplated Mechanical Diagram
1.47 [37.3]
.150 [3.81]
.600
[15.24]
.450
[11.43]
.23
[5.8]
35-75V
12V
12A
Quarter-brick
.50 [12.7]
.300
[7.62]
.145 [3.68]
See Note 4
8 7 65 4
M3 Threaded Insert
4 places
See Notes 1 and 2
2.00 [50.8]
Top View
2.32 [58.9]
.15
[3.8]
1
2
Side View
3
.44 [11.2]
.300 [7.62]
.600 [15.24]
Pin Farside Typical
See Notes 5, 6, and 7
NOTES
PIN DESIGNATIONS
1) M3 screws used to bolt unit's baseplate to other surfaces such as
heatsinks must not exceed 0.85" depth below the surface
of the baseplate.
2) Applied torque per screw should not exceed 6in-lb (0.7Nm).
3) Baseplate flatness tolerance is 0.004" (.10mm) TIR for surface.
4) Other pin extension lengths available.
5) Pins 1-3, 5-7 are 0.040" (1.02mm) dia.
with 0.080" (2.03mm) dia. standoff shoulders
6) Pins 4,8 are 0.062" (1.57mm) dia.
with 0.100" (2.54mm) dia.standoff shoulders
7) All pins: Material: Copper Alloy
Finish: Matte Tin-Lead over Nickel plate
8) Undimensioned components are shown for visual reference only
9) All dimensions in inches(mm)
Tolerances: x.xxin +/-0.02 (x.xmm +/-0.5mm)
x.xxxin +/-0.010 (x.xxmm +/-0.25mm)
10) Weight: 2.7 oz (78 g) typical
Product # PQ60120QTx12
.060+.022/-.32
[1.52+.55/-.81mm]
Bottomside
Clearance
Phone 1-888-567-9596
Pin
Name
1
2
3
4
5
6
7
8
Vin(+)
ON/OFF
Vin(–)
Vout(–)
Vout(+)
Vout(+)
Vout(+)
Vout(+)
Function
Positive input voltage
Logic control input to turn converter on/off.
Negative input voltage
Negative output voltage
Negative remote sense (see note 1)
Output voltage trim (see note 2)
Positive remote sense (see note 3)
Positive output voltage
Notes:
1. SENSE(-) may be connected to Vout(-) or left open.
2. Leave TRIM pin open for nominal output voltage.
3. SENSE(+) may be connected to Vout(+) or left open.
www.synqor.com
Doc.# 005-2QT612C Rev. C
07/24/12
Page 3
Input:
Output:
Current:
Package:
Technical Specifications
35-75V
12V
12A
Quarter-brick
PQ60120QTx12 Electrical Characteristics
Ta = 25 °C, airflow rate = 300 LFM, Vin = 48V dc unless otherwise noted; full operating temperature range is -40 °C to +100 °C baseplate temperature
with appropriate power derating. Specifications subject to change without notice."
Parameter
Min.
ABSOLUTE MAXIMUM RATINGS
Input Voltage
Non-Operating
Operating
Operating Transient Protection
Isolation Voltage
Input to Output
Operating Temperature
Storage Temperature
Voltage at ON/OFF input pin
INPUT CHARACTERISTICS
Operating Input Voltage Range
Input Under-Voltage Lockout
Turn-On Voltage Threshold
Turn-Off Voltage Threshold
Lockout Voltage Hysteresis
Maximum Input Current
No-Load Input Current
Disabled Input Current
Inrush Current Transient Rating
Response to Input Transient
Input Reflected Ripple Current
Input Terminal Ripple Current
Recommended Input Fuse
Input Filter Component Values (L\C)
Recommended External Input Capacitance
OUTPUT CHARACTERISTICS
Output Voltage Set Point
Output Voltage Regulation
Over Line
Over Load
Over Temperature
Total Output Voltage Range
Output Voltage Ripple and Noise
Peak-to-Peak
RMS
Operating Output Current Range
Output DC Current-Limit Inception
Output DC Current-Limit Shutdown Voltage
Back-Drive Current Limit while Enabled
Back-Drive Current Limit while Disabled
Maximum Output Capacitance
EFFICIENCY
100% Load
50% Load
Product # PQ60120QTx12
Typ.
-1
-40
-55
-2
Max.
Units Notes & Conditions
100
80
100
V
V
V
2000
100
125
18
°C
°C
V
35
48
75
V
32.0
28.5
2.5
33.0
29.5
3.5
34.0
30.5
4.5
5.1
120
3
0.01
V
V
V
A
mA
mA
A2s
mV
mA
mA
A
µF
µH\µF
80
1.6
500
5
170
7
3.3\6.6
47
11.82
12.00
12.18
V
+0.05 \ 5
+0.05 \ 5
±90
0.2 \ 24
0.2 \ 24
±240
12.42
%/mV
%/mV
mV
V
150
30
12.0
mV
mV
A
A
V
A
mA
mF
11.58
75
15
0
0.1
0
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13.6
7.0
0.3
10
1.0
50
6.0
91
91
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%
%
Continuous
Continuous
100ms transient, square wave
100% Load, 35V Vin
1000V/ms input transient
RMS thru 10μH inductor
RMS; Figures 13 & 14
Fast blow external recommended
Internal values, See Figure E
Typical ESR 0.1-0.2, see Figure 13
Over sample, line, load, temperature & life
500MHz bandwidth; Figures 13 & 16
Full Load, see Figures 13 & 16
Full Load, see Figures 13 & 16
Subject to thermal derating; Figures 5-8
Output Voltage 10% Low
Negative current drawn from output
Negative current drawn from output
12Vout at 12.0A Resistive Load
Figures 1 - 4
Figures 1 - 4
Doc.# 005-2QT612C Rev. C
07/24/12
Page 4
Input:
Output:
Current:
Package:
Technical Specifications
35-75V
12V
12A
Quarter-brick
PQ60120QTx12 Electrical Characteristics (continued)
Ta = 25 °C, airflow rate = 300 LFM, Vin = 48V dc unless otherwise noted; full operating temperature range is -40 °C to +100 °C baseplate temperature
with appropriate power derating. Specifications subject to change without notice.
Parameter
Min.
Typ.
DYNAMIC CHARACTERISTICS
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 (1A/µs)
Settling time
Turn-On Transient
Turn-On Time
7
Output Voltage Overshoot
Start-Up Inhibit Time
200
ISOLATION CHARACTERISTICS
Isolation Voltage (dielectric strength)
Isolation Resistance
Isolation Capacitance (input to output)
TEMPERATURE LIMITS FOR POWER DERATING CURVES
Semiconductor Junction Temperature
Board Temperature
Transformer Temperature
FEATURE CHARACTERISTICS
Switching Frequency
200
ON/OFF Control (Option P)
Off-State Voltage
-2
On-State Voltage
2.4
ON/OFF Control (Option N)
Off-State Voltage
2.4
On-State Voltage
-2
ON/OFF Control (Either Option)
Pull-Up Voltage
Pull-Up Resistance
Output Voltage Trim Range
-20
Output Voltage Remote Sense Range
Output Over-Voltage Protection
117
Over-Temperature Shutdown
Over-Temperature Shutdown Restart Hysteresis
Load Current Scale Factor
RELIABILITY CHARACTERISTICS
Calculated MTBF (Telcordia)
Calculated MTBF (MIL-217)
Field Demonstrated MTBF
Max.
Units Notes & Conditions
55
dB
120 Hz; Figure 20
600
250
500
mV
mV
µs
50% to 75% to 50% Iout max, Figue 11
50% to 75% to 50% Iout max; Figure 12
To within 1% Vout nom
ms
%
ms
Full load, Vout=90% nom; Figures 9 & 10
6 mF load capacitanc, Iout = 0A
-40˚C to +125˚C; Figure F
10
5
220
14
240
2000
30
470
240
V
MΩ
pF
125
125
125
°C
°C
°C
Package rated to 150°C
UL rated max operating temp 130°C
See Figures 5-8 for derating curves
280
kHz
Regulation and Isolation stage
0.8
18
V
V
18
0.8
V
V
9.20
V
kΩ
%
%
%
°C
°C
Figures A, B
Vin/6.5
40
122
125
10
500
10
10
127
2.1
1.75
Measured across Pins 8 & 4; Figures 23 & C
Measured across Pins 8 & 4
Over Full Temperature Range; % of nominial Vout
Average PCB Temperature
See App Note: Output Load Current Calc.
106 Hrs. TR-NWT-000332; 80% load, 300LFM, 40°C Ta
106 Hrs. MIL-HDBK-217F; 80% load, 300LFM, 40°C Ta
106 Hrs. See our website for details
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 # PQ60120QTx12
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-2QT612C Rev. C
07/24/12
Page 5
Input:
Output:
Current:
Package:
Technical Figures
95
93
90
92
Efficiency (%)
94
Efficiency (%)
100
85
80
35-75V
12V
12A
Quarter-brick
91
90
75
65
0
2
4
6
8
10
25 C
40 C
55 C
89
35 Vin
48 Vin
75 Vin
70
88
0
12
100
16
9
14
8
12
10
8
6
35 Vin
48 Vin
75 Vin
2
4
6
8
10
500
7
6
5
25 C
40 C
55 C
4
3
0
0
400
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).
Power Dissipation (W)
Power Dissipation (W)
Figure 1: Efficiency at nominal output voltage vs. load current for minimum,
nominal, and maximum input voltage at 25°C.
2
300
Air Flow (LFM)
Load Current (A)
4
200
0
12
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.
100
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).
12
11
10
9
Iout (A)
8
7
6
5
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)
4
3
2
1
0
0
25
40
55
70
85
o
Ambient Air Temperature ( C)
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 input to output (nominal input voltage).
Product # PQ60120QTx12
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Figure 6: Thermal plot of converter at 11.2 amp load current (134W) with 55°C
air flowing at the rate of 200 LFM. Air is flowing across the converter from
input to output (nominal input voltage).
www.synqor.com
Doc.# 005-2QT612C Rev. C
07/24/12
Page 6
Input:
Output:
Current:
Package:
Technical Figures
35-75V
12V
12A
Quarter-brick
12
11
10
9
Iout (A)
8
7
6
5
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)
4
3
2
1
0
0
25
40
55
70
85
Ambient Air Temperature (oC)
Figure 7: Maximum output power derating curves vs. ambient air temperature
for airflow rates of 0 LFM through 400 LFM with air flowing from pin 1 to pin 3
(nominal inout voltage).
Figure 8: Thermal plot of converter at 11.6 amp load current (139W) with 55°C
air flowing at the rate of 200 LFM. Air is flowing from pin 1 to pin 3 (nominal
input voltage).
Figure 9: Turn-on transient at full load (resistive load) (10 ms/div). Input
voltage pre-applied. Ch 1: Vout (5V/div). Ch 2: ON/OFF input (5V/div)
Figure 10: Turn-on transient at zero load (10 ms/div). Ch 1: Vout (5V/div) Ch 2:
ON/OFF input (5V/div)
Figure 11: Output voltage response to step-change in load current (50%-75%50% of Iout(max); dI/dt = 0.1A/µs). Load cap: 10µF, 100 mΩ ESR tantalum
capacitor and 1µF ceramic capacitor. Ch 1: Vout (500mV/div), Ch 2: Iout (5A/
div).
Figure 12: Output voltage response to step-change in load current (50%-75%50% of Iout(max): dI/dt = 1A/µs). Load cap: 470µF, 30 mΩ ESR tantalum
capacitor and 1µF ceramic cap. Ch 1: Vout (500V/div), Ch 2: Iout (5A/div).
Product # PQ60120QTx12
Phone 1-888-567-9596
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Doc.# 005-2QT612C Rev. C
07/24/12
Page 7
Input:
Output:
Current:
Package:
Technical Figures
Input
Reflected
Ripple
Current
source
impedance
Input
Terminal
Ripple
Current
iS
35-75V
12V
12A
Quarter-brick
Output
Voltage
Ripple
iC
DC-DC
Converter
VOUT
VSOURCE
electrolytic
capacitor
ceramic
capacitor
tantalum
capacitor
Figure 13: Test set-up diagram showing measurement points for Input Terminal
Ripple Current (Figure 14), Input Reflected Ripple Current (Figure 15) and
Output Voltage Ripple (Figure 16).
Figure 14: Input Terminal Ripple Current, ic, at full rated output current and
nominal input voltage with 10µH source impedance and 47µF electrolytic
capacitor (200 mA/div). (See Figure 13)
Figure 15: Input reflected ripple current, is, through a 10 µH source inductor at
nominal input voltage and rated load current (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: 500 MHz. See Figure 13.
14
Output Voltage (V)
12
10
8
6
4
35 V
48 V
2
75 V
0
0
2
4
6
8
10
12
14
16
Load Current (A)
Figure 17: Output voltage vs. load current showing typical current limit curves
and converter shutdown pints.
Product # PQ60120QTx12
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Figure 18: Load current (5A/div) as a function of time when the converter
attempts to turn on into a 1 mΩ short circuit. Top trace (2ms/div) is an
expansion of the on-time portion of the bottom trace.
www.synqor.com
Doc.# 005-2QT612C Rev. C
07/24/12
Page 8
Input:
Output:
Current:
Package:
Technical Figures
35-75V
12V
12A
Quarter-brick
0
1
0.1
0.01
0.001
35 Vin
Forward Transmission (dB)
Output Impedance (Ω)
-10
48 Vin
-20
-30
-40
-50
-60
-70
35 Vin
48 Vin
75 Vin
-80
-90
75 Vin
0.0001
-100
10
100
1,000
10,000
100,000
1,000,000
10
100
Hz
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.
0
100
Input Impedance (Ω)
Reverse Transmission (dB)
-5
-10
-15
-20
-25
-30
-35
10
1
35 Vin
48 Vin
75 Vin
-40
35 Vin
48 Vin
75 Vin
-45
10
100
1,000
10,000
0.1
100,000
10
Hz
Figure 21: Magnitude of incremental reverse transmission (RT = iin/iout) for
minimum, nominal, and maximum input voltage at full rated power.
100
1,000
Hz
10,000
100,000
Figure 22: Magnitude of incremental input impedance (Zin = vin/iin) for
minimum, nominal, and maximum input voltage at full rated power.
10
9
Vout Trim-up (%)
8
7
6
5
4
3
2
1
0
40.0
100% Load
50% Load
0% Load
39.5
39.0
38.5
38.0
37.5
37.0
36.5
36.0
35.5
35.0
Input Voltage (V)
Figure 23: Percentage of output voltage trim-up that can be achieved at various
input voltages frm 35V-40V and output loads of 0%, 50% and full load.
Product # PQ60120QTx12
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Doc.# 005-2QT612C Rev. C
07/24/12
Page 9
Input:
Output:
Current:
Package:
Application Section
35-75V
12V
12A
Quarter-brick
BASIC OPERATION AND FEATURES
CONTROL FEATURES
The PowerQor series converter uses a two-stage power conversion topology. The first stage is a buck-converter that keeps the
output voltage constant over variations in line, load, and temperature. The second stage uses a transformer to provide the functions
of input/output isolation and voltage step-down to achieve the
low output voltage required.
REMOTE ON/OFF (Pin 2): The ON/OFF input, Pin 2, permits
the user to control when the converter is on or off. This input is
referenced to the return terminal of the input bus, Vin(-). There are
two versions of the converter that differ by the sense of the logic
used for the ON/OFF input.
Both the first stage and the second stage switch at a fixed frequency for predictable EMI performance. Rectification of the
transformer’s output is accomplished with synchronous rectifiers.
These devices, which are MOSFETs with a very low on-state
resistance, dissipate far less energy than Schottky diodes. This
is the primary reason that the PowerQor converter has such high
efficiency, even at very low output voltages and very high output
currents.
Dissipation throughout the converter is so low that it does not
require a heatsink for operation. Since a heatsink is not required,
the PowerQor converter does not need a metal baseplate or
potting material to help conduct the dissipated energy to the
heatsink. The PowerQor converter can thus be built more simply
and reliably using high yield surface mount techniques on a PCB
substrate.
The PowerQor series of half-brick and quarter-brick converters
uses the industry standard footprint and pin-out.
ON/OFF
ON/OFF
ON/OFF
Vin(_)
Vin(_)
Vin(_)
Remote Enable Circuit
Negative Logic
(Permanently
Enabled)
5V
ON/OFF
Positive Logic
(Permanently
Enabled)
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.
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.
274k
ON/OFF
TTL/
CMOS
Vin(_)
Open Collector Enable Circuit
ON/OFF
Vin(_)
50k
TTL
100pF
50k
Vin(_)
Direct Logic Drive
Figure A: Various circuits for driving the ON/OFF pin.
Product # PQ60120QTx12
5V
Vin(+)
Phone 1-888-567-9596
Figure B: Internal ON/OFF pin circuitry
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Doc.# 005-2QT612C Rev. C
07/24/12
Page 10
Input:
Output:
Current:
Package:
Application Section
OUTPUT VOLTAGE TRIM (Pin 6): The TRIM input permits the
user to adjust the output voltage across the sense leads up or
down according to the trim range specifications.
To decrease the output voltage, the user should connect a resistor
between Pin 6 and Pin 5 (SENSE(-) input). For a desired decrease
of the nominal output voltage, the value of the resistor should be
(
)
511%
Rtrim-down =
- 10.22 kW
D%
where
D% =
Vnominal – Vdesired
Vnominal
x 100%
To increase the output voltage, the user should connect a resistor
between Pin 6 and Pin 7 (SENSE(+) input). For a desired increase
of the nominal output voltage, the value of the resistor should be
(
5.11VOUT(100%) _ 511% _
10.22
)
35-75V
12V
12A
Quarter-brick
Total DC Variation of Vout: For the converter to meet its full
specifications, the maximum variation of the DC value of Vout,
due to both trimming and remote load voltage drops, should not
be greater than that specified for the output voltage trim range.
PROTECTION FEATURES
Input Under-Voltage Lockout: The converter is designed to
turn off when the input voltage is too low, helping avoid an input
system instability problem, described in more detail in the application note titled “Input System Instability”. The lockout circuitry
is a comparator with DC hysteresis. When the input voltage is
rising, it must exceed the typical Turn-On Voltage Threshold value
(listed on the specification page) before the converter will turn
on. Once the converter is on, the input voltage must fall below
the typical Turn-Off Voltage Threshold value before the converter
will turn off.
VOUT = Nominal Output Voltage
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.
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.
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.
Rtrim-up =
where
1.225D%
D%
kW
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.
Trim Resistance (kOhms)
100,000
10,000
1,000
100
10
0
2
4
6
8
% increase Vout
10
12
14
16
18
20
% decrease Vout
Figure C: Trim Graph
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.
Note: the TRIM feature does not affect the voltage at which the
output over-voltage protection circuit is triggered. Trimming the
output voltage too high may cause the over-voltage protection
circuit to engage, particularly during transients.
It is not necessary for the user to add capacitance at the Trim pin.
The node is internally bypassed to eliminate noise.
Product # PQ60120QTx12
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-2QT612C Rev. C
07/24/12
Page 11
Input:
Output:
Current:
Package:
Application Section
APPLICATION CONSIDERATIONS
Input System Instability: This condition can occur because
any DC/DC converter appears incrementally as a negative
resistance load. A detailed application note titled “Input
System Instability” is available on the SynQor website which
provides an understanding of why this instability arises, and
shows the preferred solution for correcting it.
35-75V
12V
12A
Quarter-brick
Input Filtering and External Capacitance: Figure E below
provides a diagram showing the internal input filter components.
This filter dramatically reduces input terminal ripple current, which
otherwise could exceed the rating of an external electrolytic
input capacitor. The recommended external input capacitance
is specified in the “Input 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(+)
Vin
Electrolytic
Capacitor
47μF
External
Input
Filter
Vsense(+)
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 # PQ60120QTx12
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Doc.# 005-2QT612C Rev. C
07/24/12
Page 12
Input:
Output:
Current:
Package:
Application Section
Startup Inhibit Period: The Startup Inhibit Period ensures that
the converter will remain off for approximately 200ms when it is
shut down for any reason. When an output short is present, this
generates a 5Hz “hiccup mode,” which prevents the converter
from overheating. In all, there are seven ways that the converter
can be shut down, initiating a Startup Inhibit Period:
• Input Under-Voltage Lockout
• Input Over-Voltage Shutdown (not present in Quarter-brick)
• Output Over-Voltage Protection
35-75V
12V
12A
Quarter-brick
Figure F shows three turn-on scenarios, where a Startup Inhibit
Period is initiated at t0, t1, and t2:
Before time t0, when the input voltage is below the UVL threshold,
the unit is disabled by the Input Under-Voltage Lockout feature.
When the input voltage rises above the UVL threshold, the Input
Under-Voltage Lockout is released, and a Startup Inhibit Period is
initiated. At the end of this delay, the ON/OFF pin is evaluated,
and since it is active, the unit turns on.
At time t1, the unit is disabled by the ON/OFF pin, and it cannot
be enabled again until the Startup Inhibit Period has elapsed.
• Over Temperature Shutdown
• Current Limit
When the ON/OFF pin goes high after t2, the Startup Inhibit
Period has elapsed, and the output turns on within the typical
Turn-On Time.
• Short Circuit Protection
• Turned off by the ON/OFF input
Vin
Under-Voltage
Lockout TurnOn Threshold
ON/OFF
(neg logic)
ON
OFF
OFF
ON
ON
Vout
10ms (typical turn on time)
200ms
(typical start-up
inhibit period)
200ms
200ms
t0
t1
t
t2
Figure F: Startup Inhibit Period (turn-on time not to scale)
Product # PQ60120QTx12
Phone 1-888-567-9596
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Doc.# 005-2QT612C Rev. C
07/24/12
Page 13
Input:
Output:
Current:
Package:
Standards and Qualifications
Parameter
35-75V
12V
12A
Quarter-brick
Notes & Conditions
STANDARDS COMPLIANCE
UL 60950-1:2007
CAN/CSA-C22.2 No. 60950-1:2007
EN60950-1:A12:2011
IEC 61000-4-2
Basic insulation
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.
Parameter
QUALIFICATION TESTING
Life Test
Vibration
Mechanical Shock
Temperature Cycling
Power/Thermal Cycling
Design Marginality
Humidity
Solderability
Product # PQ60120QTx12
# Units
32
5
5
10
5
5
5
15 pins
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Test Conditions
95% rated Vin and load, units at derating point, 1000 hours
10-55 Hz sweep, 0.060" total excursion, 1 min./sweep, 120 sweeps for 3 axis
100g minimum, 2 drops in x, y and z axis
-40 °C to 100 °C, unit temp. ramp 15 °C/min., 500 cycles
Toperating = min to max, Vin = min to max, full load, 100 cycles
Tmin-10 °C to Tmax+10 °C, 5 °C steps, Vin = min to max, 0-105% load
85 °C, 85% RH, 1000 hours, continuous Vin applied except 5 min/day
MIL-STD-883, method 2003
www.synqor.com
Doc.# 005-2QT612C Rev. C
07/24/12
Page 14
Input:
Output:
Current:
Package:
Ordering Information
PART NUMBERING SYSTEM
35-75V
12V
12A
Quarter-brick
ORDERING INFORMATION
The part numbering system for SynQor’s dc-dc converters
follows the format shown in the example below.
PQ 6 0 1 2 0Q T A1 2 N R S
Options
(see
Ordering Information)
Output Current
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.
The following options must be included in place of the w x y z
spaces in the model numbers listed above.
Thermal Design
Performance Level
Thermal Design
Package Size
Output Voltage
Options Description: w x y z
Enable Logic
Pin Style
A - Open Frame
B - Baseplated
Input Voltage
K - 0.110"
N - 0.145"
R - 0.180"
Y - 0.250"
N - Negative
P - Positive
Product Family
The first 12 characters comprise the base part number and
the last 3 characters indicate available options. The “-G”
suffix indicates 6/6 RoHS compliance.
Feature Set
S - Standard
Not all combinations make valid part numbers, please contact
SynQor for availability. See the Product Summary web page for more
options.
Model Number
Application Notes
PQ60010QTA40xyz
PQ60012QTA40xyz
PQ60015QTA40xyz
PQ60018QTA40xyz
PQ60025QTA40xyz
PQ60033QTA35xyz
PQ60050QTA30xyz
PQ60120QTA12xyz
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].
Input Voltage
Range
35
35
35
35
35
35
35
35
-
75
75
75
75
75
75
75
75
Output
Voltage
V
V
V
V
V
V
V
V
1.0 V
1.2 V
1.5 V
1.8 V
2.5 V
3.3 V
5.0 V
12 V
Max Output
Current
40
40
40
40
40
35
30
12
A
A
A
A
A
A
A
A
PATENTS
SynQor holds the following U.S. patents, one or more of which apply
to each product listed in this document. Additional patent applications
may be pending or filed in the future.
Contact SynQor for further information:
Phone:
Toll Free:
Fax:
E-mail:
Web:
Address:
Product # PQ60120QTx12
978-849-0600
888-567-9596
978-849-0602
[email protected]
www.synqor.com
155 Swanson Road
Boxborough, MA 01719
USA
Phone 1-888-567-9596
5,999,417
6,222,742
6,545,890
6,577,109
6,594,159
6,731,520
6,894,468
6,896,526
6,927,987
7,050,309
7,072,190
7,085,146
7,119,524
7,269,034
7,272,021
7,272,023
7,558,083
7,564,702
7,765,687
7,787,261
8,023,290
8,149,597
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.# 005-2QT612C Rev. C
07/24/12
Page 15