SYNQOR PQ60120QEA17

Technical
Specification
PQ60120QEA17
35-75 V
12 V
17 A
2250 V dc
Quarter-brick
Input
Outputs
Current
Isolation
DC-DC Converter
The PQ60120QEA17 PowerQor® Exa quarter-brick
converter is a next-generation, board-mountable, isolated,
fixed switching frequency DC/DC converter. The Exa series
offers industry leading power density for standard isolated
DC/DC converters with both a wide input range and a
tightly regulated output. Targeted for use in intermediate bus
architectures, this module supplies an isolated step down
voltage from 35-75V to 12V. This converter is available in
open-frame and base-plated versions. RoHS Compliant (see
page 14).
PQ60120QEA17
Module
Operational Features
• Ultra-high efficiency, >95% at full rated load current, >96% at half rated load current
• Delivers up to 17 A of output current (200 W) with
minimal derating - no heatsink required
Protection Features
• Input under-voltage lockout disables converter at low
input voltage conditions
• Wide input voltage range: 35V – 75V, with 100V 100ms input voltage transient capability
• Output current limit and short circuit protection protects
converter and load from permanent damage and consequent hazardous conditions
• Fixed frequency switching provides predictable
EMI performance
• Active back bias limit provides smooth startup with
external load induced pre-bias
• No minimum load requirement means no preload
resistors required
• Wide output voltage trim range (-50% to +5%), see trim section
• Latching output over-voltage protection protects load
from damaging voltages
• Thermal shutdown protects converter from abnormal
environmental conditions
Mechanical Features
Safety Features
• Industry standard quarter-brick pin-out configuration
• 2250 V, 30 MΩ input-to-output isolation
• Industry standard size: 1.45” x 2.3” (36.8x58.4mm)
• UL 60950-1:2003 Basic Insulation
• Total height less than 0.436” (11.06mm), permits better airflow and smaller card pitch
• CAN/CSA-C22.2 No. 60950-1:2003
• EN60950-1:2001
• Total weight: 1.6 oz. (46 grams)
• Open frame units have flanged pins designed to permit
surface mount soldering (avoid wave solder) using FPiP technique
Control Features
• On/Off control referenced to input side (positive and
negative logic options are available)
Product # PQ60120QEA17
Phone 1-888-567-9596
• RoHS compliant (see page 14)
Contents
Page No.
MECHANICAL DIAGRAM (open frame) . . . . . . . . . . . . . . . . . . . . . . . . . 2
MECHANICAL DIAGRAM (base-plated) . . . . . . . . . . . . . . . . . . . . . . . . . 3
PQ60120QEA17 ELECTRICAL CHARACTERISTICS . . . . . . . . . . . . . . . 4-5
PQ60120QEA17 STANDARDS and QUALIFICATION . . . . . . . . . . . . . . 6-9
Application Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-13
ORDERING INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
www.synqor.com
Doc.# 005-0005068 Rev. A
03/19/09
Page 1
Input:
Output:
Current:
Package:
Technical Specification
35-75 V
12 V
17 A (200W)
Quarter-brick
MECHANICAL DIAGRAM (open frame)
2.30
(58.4)
0.14
(3.6)
0.43
2.00
(10.9)
(50.8)
0.300
0.150
(7.62)
(3.81)
0.300
1.45
Top View
(36.8)
0.450
(7.62)
0.600
(11.43)
0.600
(15.24)
(15.24)
0.436 max
Side View
(11.06)
Bottom side
Clearance
See Note 9
0.025 +0.024
(0.64 +0.61)
Lowest
Component
Load Board
Flanged Pin
See Note 10
NOTES
(4.57)
See Note 3
PIN DESIGNATIONS
1)Pins 1-3, 5-7 are 0.040” (1.02mm) diameter with 0.080” (2.03 mm) diameter standoff shoulders.
2)Pins 4 and 8 are 0.062” (1.57 mm) diameter with 0.100”
(2.54 mm) diameter standoff shoulders.
3)Other pin extension lengths available. Recommended pin length is 0.03” (0.76mm) greater than the PCB thickness.
4)All Pins: Material - Copper Alloy
Finish (RoHS 5/6) - Tin/Lead over Nickel plate
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: 1.5 oz. (42 g) typical
8)Workmanship: Meets or exceeds IPC-A-610C Class II
9)UL/TUV standards require a clearance greater than 0.04” (1.02mm) between input and
output for basic insulation. This issue should be considered if any copper traces are on
the top side of the user’s board. Note that the ferrite cores are considered part of the
input/primary circuit.
10)The flanged pins are designed to permit surface mount soldering (allowing to avoid the
wave soldering process) through the use of the flanged pin-in-paste technique.
Product # PQ60120QEA17
0.180
Phone 1-888-567-9596
www.synqor.com
PIN NAME
FUNCTION
1
Vin(+)
Positive input voltage
2
ON/OFF
TTL input to turn
converter on and off,
referenced to Vin(–),
with internal pull up.
3
Vin(–)
Negative input voltage
4
Vout(–)
5
SENSE(–)
Negative output voltage
Negative remote sense1
6
TRIM
Output voltage trim2
7
SENSE(+) Positive remote sense3
Vout(+)
Positive remote sense3
8
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.
Doc.# 005-0005068 Rev. A
03/19/09
Page 2
Input:
Output:
Current:
Package:
Technical Specification
MECHANICAL DIAGRAM (base-plated)
35-75 V
12 V
17 A (200W)
Quarter-brick
0.600
(15.24)
2.30
0.450
(58.4)
(11.43)
2.00
0.300
(50.8)
(7.62)
0.14
0.150
(3.6)
(3.81)
0.43
(10.9)
8
7
6
5
4
1
2
Top View
3
0.600
(15.24)
0.300
(7.62)
1.03
1.86
(26.2)
(47.2)
0.22
M3 Threaded Inserts
4 Places
(5.6)
0.21
(5.3)
1.45
(36.8)
See Notes 11 & 12
Side View
0.499 max
(12.67)
Bottom side
Clearance
See Note 9
Lowest
Component
0.025 +.024
Load Board
Flanged Pin
See Note 10
0.180
(4.57)
See Note 3
(10.46 +0.60)
NOTES
PIN DESIGNATIONS
1)Pins 1-3, 5-7 are 0.040” (1.02mm) diameter with 0.080”
PIN NAME
FUNCTION
(2.03 mm) diameter standoff shoulders.
Positive input voltage
1
Vin(+)
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 on
and off, referenced to Vin(–),
3)Other pin extension lengths available. Recommended pin length is
with internal pull up.
0.03” (0.76mm) greater than the PCB thickness.
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
TRIM
Output voltage trim2
6)All dimensions in inches (mm)
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 remote sense3
7)Weight: 2.4 oz. (69 g) typical
Notes:
8)Workmanship: Meets or exceeds IPC-A-610C Class II
9)UL/TUV standards require a clearance greater than 0.04” (1.02mm) between input
1. SENSE(–) should be connected to Vout(–) either
and output for Basic insulation. This issue should be considered if any copper traces
remotely or at the converter.
are on the top side of the user’s board. Note that the ferrite cores are considered
2. Leave TRIM pin open for nominal output voltage.
part of the input/primary circuit.
3. SENSE(+) should be connected to Vout(+) either
10)The flanged pins are designed to permit surface mount soldering (avoiding the
remotely or at the converter.
wave soldering process) through the use of the flanged pin-in-paste technique.
11)M3 screws used to bolt unit’s baseplate to other surfaces such as a heatsink must
not exceed 0.100” (2.54mm) depth below the baseplate surface.
12)Applied torque per screw should not exceed 6 in-lb (0.7 Nm).
Product # PQ60120QEA17
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0005068 Rev. A
03/19/09
Page 3
Input:
Output:
Current:
Package:
Technical Specification
35-75 V
12 V
17 A (200W)
Quarter-brick
PQ60120QEA17 ELECTRICAL CHARACTERISTICS
Ta = 25°C, airflow rate = 300 LFM, Vin = 48 V 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.
Max.
Units Notes & Conditions
ABSOLUTE MAXIMUM RATINGS
Input Voltage
Non-Operating
100
V
Continuous
Operating
80
V
Continuous
Operating Transient Protection
100
V
100ms transient, square wave
Isolation Voltage
2250
V dc
Operating Temperature
Input to Output
-40
100
°C
Storage Temperature
-55
125
°C
Voltage at ON/OFF input pin
-2
18
V
INPUT CHARACTERISTICS
Operating Input Voltage Range
35
48
75
V
31.5
28
2.5
33.0
29.5
3.5
34.5
31.0
4.5
V
V
V
7.0
A
90
120
mA
Disabled Input Current
10
40
mA
Response to Input Transient
1.5
100V transient for 100ms
Input Under-Voltage Lockout
Turn-On Voltage Threshold
Turn-Off Voltage Threshold
Lockout Voltage Hysteresis
Maximum Input Current
No-Load Input Current
Input Reflected Ripple Current
5
Input Terminal Ripple Current
150
Recommended Input Fuse
15
12
Input Filter Component Values (L\C)
Recommended External Input Capacitance
100% Load, 35 Vin, trimmed up 5%
V
0.25 V/µs input transient
mA
RMS thru 4.7µH inductor
mA
RMS
A
Fast blow external fuse recommended
3.3/3
µH\µF
Internal values; see Figure F (Lin\C2)
100
µF
Typical ESR 0.1-0.2 Ω
OUTPUT CHARACTERISTICS
Output Voltage Set Point
11.70
12.00
12.30
V
Output Voltage Regulation
Over Line
±1.0\120
%\mV
See Note 1
Over Load
±1.0\120
%\mV
See Note 1
Over Temperature
±100
Total Output Voltage Range
11.58
±240
mV
12.42
V
Output Voltage Ripple and Noise
Over sample, line, load, temperature & life
500 MHz bandwidth; See Note 2
Peak-to-Peak
100
150
mV
Full load
RMS
20
40
mV
Full load
17
A
Subject to thermal derating
28
A
Output voltage 10% Low
V
See Note 3
Operating Output Current Range
0
Output DC Current-Limit Inception
18
Output DC Current-Limit Shutdown Voltage
Back-Drive Current Limit while Enabled
Back-Drive Current Limit while Disabled
5
2
0
Maximum Output Capacitance Electrolytic
Product # PQ60120QEA17
23
Phone 1-888-567-9596
7
0.5
12
1
A
mA
Negative current drawn from output source
Negative current drawn from output source
12
mF
12Vout at 17A Resistive Load
www.synqor.com
Doc.# 005-0005068 Rev. A
03/19/09
Page 4
Input:
Output:
Current:
Package:
Technical Specification
35-75 V
12 V
17 A (200W)
Quarter-brick
PQ60120QEA17 ELECTRICAL CHARACTERISTICS
Ta = 25°C, airflow rate = 300 LFM, Vin = 48 V 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
Output Voltage during Load Current Transient
Step Change in Output Current (0.1 A/µs)
Step Change in Output Current (5 A/µs)
Settling Time
Turn-On Transient
Turn-On Time
24
Output Voltage Overshoot
EFFICIENCY
100% Load
94
50% Load
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 Regulation Stage
235.6
Switching Frequency Isolation Stage
117.8
ON/OFF Control (Option P)
Off-State Voltage
-2
On-State Voltage
4
ON/OFF Control (Option N)
Off-State Voltage
4
On-State Voltage
-2
ON/OFF Control (Either Option)
ON/OFF Control Hysteresis
Pull-Up Voltage
4.75
Pull-Up Resistance
Output Voltage Trim Range
-50
Output Over-Voltage Protection
113
Over-Temperature Shutdown
Over-Temperature Shutdown Restart Hysteresis
RELIABILITY CHARACTERISTICS
Calculated MTBF (Telcordia) TR-NWT-000332
Calculated MTBF (MIL-217) MIL-HDBK-217F
Field Demonstrated MTBF
Max.
500
500
1
Units Notes & Conditions
mV
mV
ms
50% to 75% to 50% Iout max
50% to 75% to 50% Iout max
To within 1% Vout nom
ms
%
Full load, ON/OFF to Vout=90% nom.
Maximum Output Capacitance, Iout =0A
95
96
%
%
Figures 1 & 2
Figures 1 & 2
2250
30
1000
V
MΩ
pF
See Note 4
27
2
238.0
119.0
30
125
125
125
°C
°C
°C
Package rated to 150°C
UL rated max operating temp 130°C
240.4
120.2
kHz
kHz
Over sample, temp & life
Over sample, temp & life
1
18
V
V
18
1
V
V
Figures A & B
1.5
5.00
10
118
120
10
5.25
+5
123
TBD
TBD
TBD
V
V
kΩ
%
%
°C
°C
Measured across Pins 8 & 4; see trim section
Over full temp range; % of nominal Vout
Average PCB Temperature
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 website for details
Note 1: Line and load regulation is limited by duty cycle quantization and does not indicate a shift in the internal voltage reference.
Note 2: For applications requiring reduced output voltage ripple and noise, consult SynQor applications support (e-mail: [email protected]).
Note 3: If the output voltage falls below the Output DC Current Limit Shutdown Voltage for more than 50ms, then the unit will enter into hiccup mode,
with a 500ms off-time.
Note 4: Higher values of isolation capacitance can be added external to the module.
Product # PQ60120QEA17
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0005068 Rev. A
03/19/09
Page 5
Input:
Output:
Current:
Package:
Technical Specification
35-75 V
12 V
17 A (200W)
Quarter-brick
PQ60120QEA17 STANDARDS COMPLIANCE and QUALIFICATION TESTING
Parameter
Notes & Conditions
STANDARDS COMPLIANCE
UL 60950-1:2003 Basic Insulation
CAN/CSA-C22.2 No. 60950-1:2003
EN60950-1:2001
Needle Flame Test (IEC 695-2-2)
Test on entire assembly; board & plastic components UL94V-0 compliant
IEC 61000-4-2
ESD test, 8 kV - NP, 15 kV air - NP (Normal Performance)
Note: An external input fuse must always be used to meet these safety requirements. Contact SynQor for official safety certificates on new
releases or download from the SynQor website.
Parameter
# Units
Test Conditions
QUALIFICATION TESTING
Life Test
32
95% rated Vin and load, units at derating point, 1000 hours
Vibration
5
10-55 Hz sweep, 0.060" total excursion, 1 min./sweep, 120 sweeps for 3 axis
Mechanical Shock
5
100g minimum, 2 drops in x and y axis, 1 drop in z axis
Temperature Cycling
10
-40 °C to 100 °C, unit temp. ramp 15 °C/min., 500 cycles
Power/Thermal Cycling
5
Toperating = min to max, Vin = min to max, full load, 100 cycles
Design Marginality
5
Tmin-10 °C to Tmax+10 °C, 5 °C steps, Vin = min to max, 0-105% load
Humidity
5
85 °C, 85% RH, 1000 hours, continuous Vin applied except 5 min/day
Solderability
Product # PQ60120QEA17
15 pins
Phone 1-888-567-9596
MIL-STD-883, method 2003
www.synqor.com
Doc.# 005-0005068 Rev. A
03/19/09
Page 6
Input:
Output:
Current:
Package:
Technical Specification
100
20
95
18
16
Power Dissipation (W)
90
Efficiency (%)
35-75 V
12 V
17 A (200W)
Quarter-brick
85
80
75
70
35 Vin
48 Vin
75 Vin
65
14
12
10
8
6
35 Vin
48 Vin
4
2
60
75 Vin
0
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
0
Load Current (A)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
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: Power dissipation at nominal output voltage vs. load current for
minimum, nominal, and maximum input voltage at 25°C.
21
18
Iout (A)
15
12
9
400 LFM (2.0 m/s)
6
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
3
100 LFM (0.5 m/s)
0
25
40
55
70
85
o
Ambient Air Temperature ( C)
Figure 3: 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 1 to pin 3 (nominal input voltage).
Figure 4: Thermal plot of converter at 17A load current (200W) with 55°C air
flowing at the rate of 200 LFM. Air is flowing across the converter sideways
from pin 1 to pin 3 (nominal input voltage).
21
18
Iout (A)
15
12
9
400 LFM (2.0 m/s)
6
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
3
100 LFM (0.5 m/s)
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 100 LFM through 400 LFM with air flowing lengthwise from
input to output (nominal input voltage).
Product # PQ60120QEA17
Phone 1-888-567-9596
Figure 6: Thermal plot of converter at 17A load current (200 W) 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.# 005-0005068 Rev. A
03/19/09
Page 7
Input:
Output:
Current:
Package:
Technical Specification
35-75 V
12 V
17 A (200W)
Quarter-brick
Figure 7: Turn-on transient at full load (resistive load) (4ms/div).
Ch 1: ON/OFF input (5V/div)
Ch 2: Vout (2V/div)
Figure 8: Turn-on transient at zero load (4ms/div). Ch 1: ON/OFF input (5V/
div), Ch 2: Vout (2V/div)
Figure 9: Output voltage response to step-change in load current (50%-75%-50% of
Iout(max); dI/dt = 5A/µs). Load cap: 1uF ceramic and 10uF tantalum capacitors. Top
trace: Vout (500mV/div), Bottom trace: Iout (10A/div).
Figure 10: Output voltage response to step-change in load current (50%-75%-50%
of Iout(max): dI/dt = 5A/µs). Load cap: 470µF, 15 mW ESR tantalum capacitor.
Top trace: Vout (500mV/div), Bottom trace: Iout (10A/div).
Figure 13
4.7 µH
source
impedance
Figure 12
Figure 14
iS
VSOURCE
iC
100 µF,
0.2W ESR
electrolytic
capacitor
DC/DC
Converter
VOUT
1 µF
10 µF,
ceramic 100mW ESR
capacitor
tantalum
capacitor
Figure 11: Test set-up diagram showing measurement points for Input Terminal
Ripple Current (Figure 12), Input Reflected Ripple Current (Figure 13) and
Output Voltage Ripple (Figure 14).
Product # PQ60120QEA17
Phone 1-888-567-9596
Figure 12: Input Terminal Ripple Current, ic, at full rated output current and
nominal input voltage with 4.7µH source impedance and 100µF electrolytic
capacitor (100 mA/div). See Figure 11.
www.synqor.com
Doc.# 005-0005068 Rev. A
03/19/09
Page 8
Input:
Output:
Current:
Package:
Technical Specification
35-75 V
12 V
17 A (200W)
Quarter-brick
Figure 13: Input reflected ripple current, is, through a 4.7µH source inductor,
using a 100µF input capacitor, at nominal input voltage and rated load current
(10mA/div). See Figure 11.
Figure 14: Output voltage ripple at nominal input voltage and rated load current
(50mV/div). Load capacitance: 1µF ceramic capacitor and 10µF tantalum
capacitor. Bandwidth: 500 MHz. See Figure 11.
Figure 15: Output voltage response to step-change in input voltage (50V to 100V
in 200µs). Load cap: 470µF, 15 mW ESR tantalum capacitor. Ch 1: Vin (20V/div),
Ch 2: Vout (1V/div), at zero load current.
Figure 16: Load current (5A/div) as a function of time when the converter attempts
to turn on into a 10 mW short circuit.
15
14
OVP Shutdown
Output Voltage (V)
13
12
11
10
9
8
7
6
5
4
36Vin
48Vin
75Vin
3
2
1
0
-15
-10
-5
0
5
10
15
20
25
30
Load Current (A)
Figure 17: Output voltage vs. load current showing typical current limit curves
and OVP shutdown point.
Product # PQ60120QEA17
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0005068 Rev. A
03/19/09
Page 9
Input:
Output:
Current:
Package:
Technical Specification
35-75 V
12 V
17 A (200W)
Quarter-brick
BASIC OPERATION AND FEATURES
CONTROL FEATURES
The PowerQor Exa series converter uses a two-stage power conversion topology. The first stage 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(-). The converter is available with either positive or negative 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 significantly less energy than Schottky diodes, enabling
the PowerQor converter to achieve high efficiency.
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. As an open frame module, the PowerQor converter can
be built more simply and reliably using high yield surface mount
techniques on a PCB substrate.
The PowerQor series of half-brick, quarter-brick and eighth-brick
converters uses the industry standard footprint and pin-out configuration.
ON/OFF
ON/OFF
Vin(_)
Vin(_)
Remote Enable Circuit
Negative Logic
(Permanently Enabled)
ON/OFF
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.
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 sense leads (pins 7 and 5) to determine when it should
trigger, not the voltage across the converter’s output pins (pins 8
and 4).
ON/OFF
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. SynQor uses
industry standard trim equations.
Vin(_)
To decrease the output voltage, the user should connect a resistor
between Pin 6 (TRIM) and Pin 5 (SENSE(–) input). For a desired
decrease of the nominal output voltage, the value of the resistor
should be:
Rtrim-down =
Positive Logic
(Permanently Enabled)
(511
) _ 10.22
D%
kW
where
5V
ON/OFF
CMOS
Vin(_)
Open Collector Enable Circuit
In the positive logic version, the ON/OFF input is active high
(meaning that a high voltage turns the converter on). In the negative logic version, the ON/OFF signal is active low (meaning that
a low voltage turns the converter on). Figure A details five possible circuits for driving the ON/OFF pin.
D% =
Vnominal – Vdesired
Vnominal
x 100%
Vin(_)
Direct Logic Drive
Figure A: Various circuits for driving the ON/OFF pin.
Product # PQ60120QEA17
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03/19/09
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Input:
Output:
Current:
Package:
Technical Specification
To increase the output voltage, the user should connect a resistor
between Pin 6 (TRIM) 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 _
10.22
1.225D%
D%
)
(kW)
where
VOUT = Nominal Output Voltage
Figure B graphs
the relationship between the trim resistor value, Rtrim-up and Rtrim-down,
showing the total range the output voltage can be trimmed up or
down.
0
5
10
15
20
25
30
35
40
45
50
1,000,000.0
Trim Resistance (kOhms)
100,000.0
10,000.0
1,000.0
35-75 V
12 V
17 A (200W)
Quarter-brick
few hundred hours, but not for an indefinite period or the product
lifetime. The OVP trip point is set above this level, so it will not
shut down from output overvoltage protection when trimmed up
between 5% and 10%. Continuous operation of this converter
while trimmed up more than 5% could affect long term reliability.
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 to avoid
an input system instability problem, which is described in more
detail in the application note titled “Input System Instability” 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* 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: If the output current exceeds the “Output
DC Current Limit Inception” point*, then a fast linear current limit
controller will reduce the output voltage to maintain a constant
output current. If as a result, the output voltage falls below the
“Output DC Current Limit Shutdown Voltage”* for more than
50ms, then the unit will enter into hiccup mode, with a 500ms
off-time. The unit will then automatically attempt to restart.
100.0
10.0
1.0
0.1
% Increase in Vout
% Decrease in Vout
Figure B: Trim Graph for 12Vout 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 filtered to eliminate noise.
Limited 10% up-trim: This converter is capable of operating
for an indefinite period of time with the output trimmed up to 5%
above the nominal 12V output level*. It may also be trimmed
down by as much as 50% (to 6.0V) indefinitely.
This converter is also capable of being trimmed up by as much
as 10% (up to 13.2V) for shorter periods of time that are not a
significant fraction of the product lifetime. For example, in a test
situation, or for output voltage margining where it would remain
trimmed up between 5% and 10% of the nominal voltage for a
Back-Drive Current Limit: If there is negative output current
of a magnitude larger than the “Back-Drive Current Limit while
Enabled” specification*, then a fast back-drive limit controller will
increase the output voltage to maintain a constant output current.
If this results in the output voltage exceeding the “Output OverVoltage Protection” threshold*, then the unit will shut down. The
full I-V output characteristics can be seen in Figure 17.
Output Over-Voltage Limit: If the voltage directly across
the output pins exceeds the “Output Over-Voltage Protection”
threshold*, the converter will immediately stop switching. This
shutdown is latching; unlike other shutdown types, the converter
will not restart unless the input power is cycled or the ON/OFF
input is toggled.
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*.
* See Electrical Characteristics page.
Product # PQ60120QEA17
Phone 1-888-567-9596
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Doc.# 005-0005068 Rev. A
03/19/09
Page 11
Input:
Output:
Current:
Package:
Technical Specification
APPLICATION CONSIDERATIONS
Limited Output Voltage Resolution: The internal voltage
control feedback loop has limited resolution. Therefore, the output
voltage will exhibit discrete steps as the loop responds to changes
in line, load, trim, or remote sense. For instance, on close examination, the startup ramp has a “stair-step” shape. Likewise, a
load transient response will be composed of multiple discrete
steps. The size of each step is well determined, and is shown in
Figure C. A close-up picture of a single step is shown in Figure D.
Stepping will not occur under steady state conditions.
35-75 V
12 V
17 A (200W)
Quarter-brick
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.
Current share and active trim not recommended: It is
important to note that external feedback control using the sense or
trim pins will cause sustained stepping. External current share or
active trim circuits contain a separate reference voltage. After this
external feedback has taken control, the actual output voltage can
still differ from the external reference voltage by as much as the
step size. If the external feedback loop integrates this error voltage, it will cause a limit cycle oscillation. For this reason, external
feedback using the sense and trim pins is not recommended.
140
Vout Step Size (mV)
120
100
80
60
40
= 12.0 Vout
= 10.0 Vout
20
≤ 8.75 Vout
0
35
40
45
50
55
60
65
70
75
Vin (V)
Figure C: Output voltage resolution.
Figure D: Smallest possible Vout step at 48Vin and 12Vout.
* See Electrical Characteristics page.
Product # PQ60120QEA17
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Doc.# 005-0005068 Rev. A
03/19/09
Page 12
Input:
Output:
Current:
Package:
Technical Specification
Application Circuits: Figure E below provides a typical circuit
diagram which details the input filtering and voltage trimming.
Input Filtering and External Input Capacitance: Figure F
below shows 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 on the Electrical Specifications page.
More detailed information is available in the application note
titled “EMI Characteristics” on the SynQor website.
35-75 V
12 V
17 A (200W)
Quarter-brick
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].
Output Filtering and External Output Capacitance:
Figure F below shows the internal output filter components. This
filter dramatically reduces output voltage ripple. However, some
minimum external output capacitance is required, as specified in
the Output Characteristics section on the Electrical Specifications
page. No damage will occur without this capacitor connected,
but peak output voltage ripple will be much higher.
Electrolytic
Capacitor
External
Input
Filter
Vin
Vout(+)
Vin(+)
Vsense(+)
100µF
ESR @ 0.2W
Trim
ON/OFF
Vsense(_)
Vin(_)
Rtrim-up
or
Rtrim-down
Cload
Iload
Vout(_)
Figure E: Typical application circuit (negative logic unit, permanently enabled).
Lin
Vin(+)
Vout(+)
C1
C2
Vin(_)
Regulation
Stage
Current
Sense
Isolation
Stage
Vout(_)
Figure F: Internal Input and Output Filter Diagram (component values listed on specifications page).
Product # PQ60120QEA17
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Doc.# 005-0005068 Rev. A
03/19/09
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Input:
Output:
Current:
Package:
Technical Specification
35-75 V
12 V
17 A (200W)
Quarter-brick
PART NUMBERING SYSTEM
ORDERING INFORMATION
The part numbering system for SynQor’s NiQor 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.
A “-G” suffix indicates the product is 6/6 RoHS compliant.
PQ 6 0 12 0Q E A 1 7 N N S
Options
(see
Ordering Information)
Output Current
Thermal Design
Model Number
Input
Voltage
Output
Voltage
Max Output
Current
PQ60120QEw17xyz
35-75 V
12 V
17A
(see Ordering Info)
Performance Level
Package Size
The following options must be included in place of the w x y z
spaces in the model numbers listed above.
Output Voltage
Input Voltage
Product Family
Options Description: w x y z
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.
Application Notes
A variety of application notes and technical white papers can
be downloaded in pdf format from our website.
Thermal Design
Enable Logic
Pin Style
Feature Set
A - Open Frame
B - Baseplated
P - Positive
N - Negative
K - 0.110"
N - 0.145"
R - 0.180"
Y - 0.250"
S - Standard
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].
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 # PQ60120QEA17
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.# 005-0005068 Rev. A
03/19/09
Page 14