SYNQOR PQ60120HZB50NRS-G

Technical
Specification
PQ60120HZx50
35-75V
12V
50A
2250Vdc
Half-brick
Input
Output
Current
Isolation
DC/DC Converter
The PQ60120HZA50 PowerQor® Zeta half-brick converter
is a next-generation, board-mountable, isolated, fixed
switching frequency DC/DC converter. The Zeta 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 and provides
more available power and higher efficiency than most
competitive bus converters. This converter is available
in open-frame and baseplated versions. RoHS Compliant
(see page 13).
Operational Features
PQ60120HZA50
• Ultra-high efficiency, 95% at full rated load current, 96.5% at half
rated load current
• Delivers up to 50A of output current (600W) with optional base-plate
configuration
• Wide input voltage range: 35V – 75V, with 100V 100ms input voltage
transient capability
• Fixed frequency switching provides predictable EMI performance
• No minimum load requirement means no preload resistors required
• Wide output voltage trim range (-50% to +5%), see trim section
Mechanical Features
Protection Features
•Input under-voltage lockout disables converter at low input
voltage conditions
• Output current limit and short circuit protection protects converter
and load from damage and consequent hazardous conditions
• Active back bias limit provides smooth startup with external load
induced pre-bias
•Latching output over-voltage protection protects load from
damaging voltages
• Industry standard half-brick pin-out configuration
•Thermal shutdown protects converter from abnormal
environmental conditions
• Industry standard size: 2.3” x 2.4” (58.4 x 61.0mm)
• Total height only 0.50” (12.7mm) for baseplated unit, open-frame
only 0.420” (10.67mm)
• Total weight: 4.3 oz (123 g) for baseplated unit, the open-frame
units are 2.6 oz (75 g)
• 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)
Contents
Safety Features
Page No.
• 2250 V input-to-output isolation
• UL 60950-1:2003, basic insulation
• CAN/CSA-C22.2 No. 60950-1:2003
• EN60950-1:2001
• RoHS compliant (see page 13)
Product # PQ60120HZx50
Phone 1-888-567-9596
MECHANICAL DIAGRAM (open frame) . . . . . . . . . . . . . . . . . . . . . . . . . 2
MECHANICAL DIAGRAM (base-plated) . . . . . . . . . . . . . . . . . . . . . . . . . 3
PQ60120HZA50 ELECTRICAL CHARACTERISTICS . . . . . . . . . . . . . . . 4-5
PQ60 Standards and Qualifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
PQ60-HZ Figures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Application Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
www.synqor.com
Doc.# 005-2HZ612J Rev. D
06/12/09
Page 1
Input:
Output:
Current:
Package:
Technical Specification
35-75 V
12 V
50 A (600W)
Half-brick
MECHANICAL DIAGRAM (open frame)
2.40
[61]
1.400[35.56]
1.000 [25.4]
.700[17.78]
.044±.027
[1.12±0.68]
BOTTOMSIDE CLEARANCE
.400[10.16]
2.30
[58.4]
9
8
7
6
5
TOP VIEW
1.90
[48.3]
SIDE VIEW
.19
[4.8]
1
2
3
4
.413±.017
[10.49±0.43]
OVERALL HEIGHT
.50 [12.7]
.400 [10.16]
1.00[25.4]
.180 [4.57]
SEE NOTE 3
1.400
[35.56]
NOTES
PIN DESIGNATIONS
1)
Pins 1-4, 6-8 are 0.040” (1.02mm) diameter, with 0.080” (2.03mm)
diameter standoff shoulders.
2)
Pins 5 and 9 are 0.080” (2.03 mm) diameter with 0.125” (3.18mm)
diameter standoff shoulders.
3)
Pin
Name
Function
1
Vin(+)
Positive input voltage
Other pin extension lengths available. Recommended pin
length is 0.03” (0.76mm) greater than the PCB thickness.
2
ON/OFF
TTL input to turn converter on and off,
referenced to Vin(–), with internal pull
up.
4)
All Pins: Material - Copper Alloy- Finish (RoHS 6/6) - Matte Tin over
Nickel plate
3
Reserved
Not connected
5)
Undimensioned components are shown for visual reference only.
4
Vin(–)
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)
5
Vout(–)
Weight: 4.3oz (123g) for baseplated unit, open-frame 2.6oz (75g)
typical
6
SENSE(–)
7)
7
TRIM
8)
Workmanship: Meets or exceeds IPC-A-610C Class II
8
SENSE(+)
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 core shown at left above is considered
part of the input/primary circuit and that the two ferrite cores shown
at the right above are considered part of the output/secondary circuit.
9
Vout(+)
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 # PQ60120HZx50
Phone 1-888-567-9596
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(–) should be connected to Vout(–) either remotely or at the converter.
2) Leave TRIM pin open for nominal output voltage.
3) SENSE(+) should be connected to Vout(+) either remotely or at the converter.
www.synqor.com
Doc.# 005-2HZ612J Rev. D
06/12/09
Page 2
Input:
Output:
Current:
Package:
Technical Specification
35-75 V
12 V
50 A (600W)
Half-brick
MECHANICAL DIAGRAM (base-plated)
2.40 [61 ]
2.00 [50.8]
1.400 [35.56]
1.000 [25.4]
.700 [17.78]
.400 [10.16]
.145 [3.687]
SEE NOTE 6
.02 [5.1]
9
8
7
6
.495 ±.024
[12.57±0.6]
OVERALL HEIGHT
5
2.30
[58.4]
1.90
[48.3]
SIDE VIEW
TOP VIEW
1.90
[48.3]
.19
[4.8 ]
1
2
3
4
.50 [12.7]
.400[10.16]
1.00 [25.4]
1.400 [35.56]
M3 THREADED INSERT
4 PLACES
SEE NOTE 1
NOTES
1) M3 screws used to bolt unit’s baseplate to other surfaces (such
as heatsink) must not exceed 0.100” (2.54 mm) depth below the
surface of the baseplate.
2) Applied torque per screw should not exceed 6in-lb. (0.7 Nm)
3) Baseplate flatness tolerance is 0.004" (.10mm) TIR for surface
4) Pins 1-4, 6-8, are 0.040" (1.02mm) diameter with 0.080”
(2.03mm) diameter standoff shoulders
5) Pins 5 and 9 are 0.080" (2.03mm) dia. with .125" (3.18) dia.
shoulderless pins.
6) Other pin extension lengths available
7) All Pins: Material: Copper Alloy
Finish: Tin-Lead over Nickel plate
8) Undimensioned components are shown for visual reference only.
9) Weight: 4.3 oz (123 g) typical
10) All dimensions in inches (mm)
Tolerances: x.xx +/-0.02 in. (x.x +/-0.5mm)
x.xxx +/-0.010 in. (x.xx +/-0.25mm)
11) Workmanship: Meets or exceeds IPC-A-610C Class II
12) 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 # PQ60120HZx50
Phone 1-888-567-9596
.044 ±0.27
[1.12±0.68]
BOTTOMSIDE
CLEARANCE
PIN DESIGNATIONS
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
Reserved
Not connected
4
Vin(-)
Negative input voltage
5
Vout(-)
Negative output voltage
6
SENSE(-)
Return remote sense
7
TRIM
Output voltage trim
8
SENSE(+)
Positive remote sense
9
Vout(+)
Positive output voltage
Notes
1.
SENSE(–) should be connected to Vout(–) either remotely or at the
converter
2.
Leave TRIM pin open for nominal output voltage.
3.
SENSE(+) should be connected to Vout(+) either remotely or at the
converter.
www.synqor.com
Doc.# 005-2HZ612J Rev. D
06/12/09
Page 3
Input:
Output:
Current:
Package:
Technical Specification
35-75 V
12 V
50 A (600W)
Half-brick
PQ60120HZA50 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.
ABSOLUTE MAXIMUM RATINGS
Input Voltage
Non-Operating
100
Operating
80
Operating Transient Protection
100
Isolation Voltage (input to output)
2250
Operating Temperature
-40
100
Storage Temperature
-55
125
Voltage at ON/OFF input pin
-2
18
INPUT CHARACTERISTICS
Operating Input Voltage Range
35
48
75
Input Under-Voltage Lockout
Turn-On Voltage Threshold
31.5
33.0
34.5
Turn-Off Voltage Threshold
29.0
30.5
32.0
Lockout Voltage Hysteresis
1.5
2.5
3.5
Maximum Input Current
20
No-Load Input Current
125
200
Disabled Input Current
20
40
Response to Input Transient
1.0
Input Reflected Ripple Current
5
20
Input Terminal Ripple Current
220
Recommended Input Fuse
30
Input Filter Component Values (L\C)
0.75\11
Recommended External Input Capacitance
220
OUTPUT CHARACTERISTICS
Output Voltage Set Point
11.72
12.00
12.28
Output Voltage Regulation
1
+1.0\120
Over Line +1.0\120
Over Load1
+90
+240
Over Temperature
Total Output Voltage Range
11.60
12.40
Output Voltage Ripple and Noise2
90
150
Peak-to-Peak
20
30
RMS Operating Output Current Range
0
50
55
60
Output DC Current-Limit Inception
70
Output DC Current-Limit Shutdown Voltage3
5.0
Back-Drive Current Limit while Enabled
13
18
23
Back-Drive Current Limit while Disabled
0
3
4
Maximum Output Capacitance
12
DYNAMIC CHARACTERISTICS
Output Voltage during Load Current Transient
For a Step Change in Output C urrent (0.1A/µs)
350
For a Step Change in Output Current (5A/µs)
500
Settling Time
1
Turn-On Transient
Turn-On Time
25
29
32
Output Voltage Overshoot
2
EFFICIENCY
100% Load
94.5
95.0
50% Load
96.5
TEMPERATURE LIMITS FOR POWER DERATING CURVES
Semiconductor Junction Temperature
125
Board Temperature
125
Transformer Temperature
125
ISOLATION CHARACTERISTICS
Isolation Voltage (dielectric strength)
2250
Isolation Resistance
30
Isolation Capacitance4
1000
Note
Note
Note
Note
1:
2:
3:
4:
Units Notes & Conditions
V
V
V
V
°C
°C
V
Continuous
Continuous
100ms transient, square wave
Basic insulation, Pollution Degree 2
V
100V transient for 100ms
V
V
V
A
mA
mA
V
mA
mA
A
µH\µF
µF
100% Load, 35 Vin, trimmed up 5%
0.25V/µs input transient
RMS thru 4.7µH inductor
RMS
Fast blow external fuse recommended
Internal values; see Figure F (Lin\C2)
Typical ESR 0.1-0.2W
V
%\mV
%\mV
mV
V
mV
mV
A
A
V
A
mA
mF
Over sample, line, load, temperature & life
20MHz bandwidth
Full Load
Full Load
Subject to thermal derating
Output Voltage 10% Low
Negative current drawn from output source
Negative current drawn from output source
12Vout at 50A Resistive Load
mV
mV
ms
50% to 75% to 50% Iout max, 470 µF load cap
“
To within 1% Vout nom
ms
%
Full load, ON/OFF to Vout=90% nom.
%
%
Figures 1 & 2
Figures 1 & 2
°C
°C
°C
Package rated to 150°C
UL rated max operating temp 130°C
See Figures 3 - 6 for derating curves
V
MW
pF
Line and load regulation is limited by duty cycle quantization and does not indicate a shift in the internal voltage reference.
For applications requiring reduced output voltage ripple and noise, consult SynQor applications support (e-mail: [email protected]).
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.
Higher values of isolation capacitance can be added external to the module.
Product # PQ60120HZx50
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-2HZ612J Rev. D
06/12/09
Page 4
Input:
Output:
Current:
Package:
Technical Specification
35-75 V
12 V
50 A (600W)
Half-brick
ELECTRICAL CHARACTERISTICS (Continued)
Parameter P
Min.
Typ.
Max.
Units Notes & Conditions
FEATURE CHARACTERISTICS
Switching Frequency Regulation Stage
230
240
250
kHz
Switching Frequency Isolation Stage
115
120
125
kHz
ON/OFF Control (Option P)
Off-State Voltage -2.0
1.0
V
On-State Voltage
4.0
18
V
ON/OFF Control (Option N)
Off-State Voltage
4.0
18
V
On-State Voltage
-2
1.0
V
ON/OFF Control (Either Option)
ON/OFF Control Hysteresis
1.5
V
Pull-Up Voltage
4.75
5.00
5.25
V
Pull Up Resistance
10
kW
Output Voltage Trim Range
-50
+5
%
Output Over-Voltage Protection
113
118
123
%
Over-Temperature Shutdown
120
°C
Over-Temperature Shutdown Restart Hysteresis
10
°C
RELIABILITY CHARACTERISTICS
6
Calculated MTBF (Telcordia)
2.1
10 Hrs.
Calculated MTBF (MIL-217)
1.9
106 Hrs.
Field Demonstrated MTBF
106 Hrs.
Over sample, temp & life
Over sample, temp & life
Figures A & B
Measured across Pins 8 & 4; see trim section
Over full temp range; % of nominal Vout
Average PCB Temperature
TR-NWT-000332; 80% load,300LFM, 40oC Ta
MIL-HDBK-217F; 80% load, 300LFM, 40oC Ta
See website for details
PQ60 Standards and Qualifications
Parameter
Notes & Conditions
STANDARDS COMPLIANCE
UL 60950-1:2003 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
10-55Hz 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 5min./day
Solderability
Product # PQ60120HZx50
15 pins
Phone 1-888-567-9596
MIL-STD-883, method 2003
www.synqor.com
Doc.# 005-2HZ612J Rev. D
06/12/09
Page 5
Input:
Output:
Current:
Package:
Technical Specification
50
98
45
96
40
Power Dissipation (W)
100
Efficiency (%)
94
92
90
88
86
35Vin
48Vin
75Vin
84
82
35-75 V
12 V
50 A (600W)
Half-brick
35
30
25
20
15
35Vin
48Vin
75Vin
10
5
0
80
0
10
20
30
40
0
50
10
20
30
40
50
Load Current (A)
Load Current (A)
Figure 2: Power dissipation at nominal output voltage vs. load current for
minimum, nominal, and maximum input voltage at 25°C.
Figure 1: Efficiency at nominal output voltage vs. load current for minimum,
nominal, and maximum input voltage at 25°C.
50
45
40
Iout (A)
35
30
25
20
15
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
10
200 LFM (1.0 m/s)
5
100 LFM (0.5 m/s)
0
25
40
55
70
85
Ambient Air Temperature (oC)
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 4 to pin 1 (nominal input voltage).
Figure 4: Thermal plot of converter at 36 A load current (432 W) with 55°C
air flowing at the rate of 200 LFM. Air is flowing across the converter sideways
from pin 4 to pin 1 (nominal input voltage).
50
45
40
Iout (A)
35
30
25
20
15
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
10
200 LFM (1.0 m/s)
5
100 LFM (0.5 m/s)
0
25
40
55
70
85
Ambient Air Temperature (oC)
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 # PQ60120HZx50
Phone 1-888-567-9596
Figure 6: Thermal plot of converter at 36 A load current (432 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.# 005-2HZ612J Rev. D
06/12/09
Page 6
Input:
Output:
Current:
Package:
Technical Specification
35-75 V
12 V
50 A (600W)
Half-brick
Figure 7: Turn-on transient at full load (resistive load) (10 ms/div).
Ch 1: Vout (5 V/div)
Ch 2: ON/OFF input (5 V/div)
Figure 8: Turn-on transient at zero load (10 ms/div).
Ch 1: Vout (5 V/div)
Ch 2: ON/OFF input (5 V/div)
Figure 9: Output voltage response to step-change in load current (50%-75%-50% of
Iout(max); dI/dt = 0.1 A/µs; 1 ms/div). Load cap: 1 uF ceramic and 470 µF, 15 mW ESR
electrolitic capacitors. Top trace: Vout (500 mV/div). Bottom trace: Iout (10 A/div).
Figure 10: Output voltage response to step-change in load current (50%-75%-50% of
Iout(max): dI/dt = 5 A/µs; 1 ms/div). Load cap: 470 µF, 15 mW ESR electrolitic capacitor.
Top trace: Vout (500 mV/div). Bottom trace: Iout (10 A/div).
Figure 13
4.7 µH
source
impedance
Figure 12
Figure 14
iS
VSOURCE
iC
220 µF,
0.2W ESR
electrolytic
capacitor
DC/DC
Converter
VOUT
1 µF
15 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 # PQ60120HZx50
Phone 1-888-567-9596
Figure 12: Input Terminal Ripple Current, ic, at full rated output current and
nominal input voltage with 4.7 µH source impedance and 220 µF electrolytic
capacitor (1 A/div; 2 µs/div). See Figure 11.
www.synqor.com
Doc.# 005-2HZ612J Rev. D
06/12/09
Page 7
Input:
Output:
Current:
Package:
Technical Specification
35-75 V
12 V
50 A (600W)
Half-brick
Figure 13: Input reflected ripple current, is, through a 4.7 µH source inductor,
using a 220 µF input capacitor, at nominal input voltage and rated load current
(10 mA/div; 2 µs/div). See Figure 11.
Figure 14: Output voltage ripple at nominal input voltage and rated load current
(50 mV/div; 2 µs/div). Load capacitance: 1 µF ceramic capacitor and 15 µF
tantalum capacitor. Bandwidth: 20 MHz. See Figure 11.
Figure 15: Output voltage response to step-change in input voltage (35 V to 75 V in
300 µs; 1 ms/div). Load cap: 470 µF, 15 mW ESR electrolitic capacitor. Top trace: Vout
(500 mV/div). Bottom trace: Vin (10 V/div), at zero load current.
Figure 16: Load current (10 A/div; 10 ms/div) as a function of time when the
converter attempts to turn on into a 1 mW short circuit.
16
14
Output Voltage (V)
12
10
8
6
4
36Vin
48Vin
75Vin
2
0
-25
-15
-5
5
15
25
35
45
55
65
Load Current (A)
Figure 17: Output voltage vs. load current showing typical current limit curves
and OVP shutdown point.
Product # PQ60120HZx50
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-2HZ612J Rev. D
06/12/09
Page 8
Input:
Output:
Current:
Package:
Technical Specification
35-75 V
12 V
50 A (600W)
Half-brick
BASIC OPERATION AND FEATURES
CONTROL FEATURES
The PowerQor Zeta 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(_)
Vin(_)
Remote Enable Circuit
ON/OFF
Negative Logic
(Permanently Enabled)
ON/OFF
Positive Logic
(Permanently Enabled)
5V
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).
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.
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 =
(D100%) _ 2
kW
where
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 # PQ60120HZx50
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-2HZ612J Rev. D
06/12/09
Page 9
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
– 2) x V
( Vnominal
1.225
DES
+ VNOM
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
10,000.0
1,000.0
Trim Resistance (kOhms)
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.
kW
VDES – VNOM
35-75 V
12 V
50 A (600W)
Half-brick
100.0
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.
10.0
1.0
0.1
0.0
% 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 few hundred hours, but not for an indefinite period or the
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 “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*.
* See Electrical Characteristics page.
Product # PQ60120HZx50
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-2HZ612J Rev. D
06/12/09
Page 10
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.
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.
35-75 V
12 V
50 A (600W)
Half-brick
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.
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.
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 # PQ60120HZx50
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-2HZ612J Rev. D
06/12/09
Page 11
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.
Electrolytic
Capacitor
External
Input
Filter
Vin
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.
Vout(+)
Vin(+)
Vsense(+)
220µF
ESR @ 0.2W
35-75 V
12 V
50 A (600W)
Half-brick
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 # PQ60120HZx50
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-2HZ612J Rev. D
06/12/09
Page 12
Input:
Output:
Current:
Package:
Technical Specification
35-75 V
12 V
50 A (600W)
Half-brick
PART NUMBERING SYSTEM
ORDERING INFORMATION
The part numbering system for SynQor’s dc-dc converters
follows the format shown in the example below.
The tables below show the valid model numbers and ordering
options for converters in this product family. When ordering
SynQor converters, please ensure that you use the complete
15 character part number consisting of the 12 character base
part number and the additional 3 characters for options.
Add “-G” to the model number for 6/6 RoHS compliance.
PQ 6 0 1 2 0 H Z A 5 0 N N S - G
6/6 RoHS
Options (see
Ordering Information)
Output Current
Thermal Design
Performance Level
Model Number
Input
Voltage
Output
Voltage
Max Output
Current
PQ60120HZw50xyz-G
35-75 V
12 V
50 A
PQ55530HZw12xyz-G
38-55 V
53 V
11.5 A
The following options must be included in place of the x y z
spaces in the model numbers listed above.
Package Size
Output Voltage
Input Voltage
Options Description: x y z
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.
Application Notes
A variety of application notes and technical white papers can
be downloaded in pdf format from our website.
RoHS Compliance: The EU led RoHS (Restriction of Hazardous
Substances) Directive bans the use of Lead, Cadmium, Hexavalent
Chromium, Mercury, Polybrominated Biphenyls (PBB), and
Polybrominated Diphenyl Ether (PBDE) in Electrical and Electronic
Equipment. This SynQor product is 6/6 RoHS compliant. For
more information please refer to SynQor’s RoHS addendum
available at our RoHS Compliance / Lead Free Initiative web
page or e-mail us at [email protected]
Thermal Design
Enable Logic
Pin Style
Feature Set
A - Open Frame
B - Baseplate
P - Positive
N - Negative
K - 0.110"
N - 0.145"
R - 0.180"
Y - 0.250"
S - Standard
Not all combinations make valid part numbers, please contact
SynQor for availability. See the Product Summary web page for
more options. Many operational functions of this converter are
programmable. Contact the factory regarding customizing.
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 # PQ60120HZx50
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.# 005-2HZ612J Rev. D
06/12/09
Page 13