PQ60240HZC25NNA-G [SYNQOR]
DC-DC Regulated Power Supply Module, 1 Output, 600W, Hybrid, ROHS COMPLIANT, HALF BRICK PACKAGE-10/8;
| 型号： | PQ60240HZC25NNA-G |
| 厂家： | 
SYNQOR WORLDWIDE HEADQUARTERS |
| 描述： | DC-DC Regulated Power Supply Module, 1 Output, 600W, Hybrid, ROHS COMPLIANT, HALF BRICK PACKAGE-10/8 |
| 文件： | 总16页 (文件大小：3091K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Technical
Specification
PQ60240HZx25
35-75V
100V
24V
600W
Max Power
2250V dc
Half-brick
DC-DC Converter
Input
Transient Input Output
Isolation
The PQ60240HZx25 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. This
module supplies an isolated step down voltage from
35-75V to 24V and is available in openframe and
encased versions. RoHS Compliant (see last page).
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 provides smooth startup with
external load induced pre-bias
• Auto-recovery output over-voltage protection protects load from
PQ60240HZx25 Model
damaging voltages
• Thermal shutdown protects converter from abnormal
environmental conditions
Operational Features
High efficiency, 94% at full rated load current
• Delivers up to 25A of output current (600W)
• Input voltage range: 35-75V
Mechanical Features
Fixed frequency switching provides predictable EMI performance
No minimum load requirement means no preload resistors required
Wide output voltage trim range (-50%, +10%), see trim section
Optional: Active current share for parallel applications
• Industry standard half-brick pin-out configuration
• Size: 2.30" x 2.40" x 0.428", 58.4 x 61.0 x 10.9 mm
• Total weight: 2.6 oz. (75 g)
Control Features
• On/Off control referenced to input side
(positive and negative logic options are available)
• Remote sense for the output voltage
Contents
Page No.
Mechanical Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Electrical Characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Standards & Qualifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Technical Figures. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Applications Section. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Ordering Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Safety Features
• UL 60950-1:R2011-12
• EN60950-1/A12:2011
• CAN/CSA-C22.2 No. 60950-1/A1:2011
Input: 35-75V
Output: 24V
Current: 25A
Open Frame Mechanical
Package: Half-brick
2.40 [61]
1.400 [35,56]
1.000 [25,4]
.700 [17,78]
.400 [10,16]
.059 .028
[1,5 0,71]
BOTTOMSIDE
CLEARANCE
2.30
[58,4]
8
6
9
7
5
TOP VIEW
1.900
[48,26]
.19
[4,8]
SIDE VIEW
1
2
3
B
4
.400 [10,16]
.428 .018
[10,87 0,45]
.800 [20,32]
1.000 [25,4]
1.400 [35,56]
OVERALL HEIGHT
.180
.50 [12,7]
[4,57]
SEE NOTE 3
NOTES
PIN DESIGNATIONS
1)
Pins 1-4, 6-8, and B are 0.040” (1.02mm) diameter, with 0.080”
(2.03mm) diameter standoff shoulders.
Pin
Name
Function
2)
Pins 5 and 9 are 0.080” (2.03 mm) diameter with 0.125” (3.18mm)
diameter standoff shoulders.
1
Vin(+)
Positive input voltage
TTL input to turn converter on and off,
referenced to Vin(–), with internal pull up.
2
ON/OFF
3)
4)
Other pin extension lengths available.
B
SHARE(+)
Active current share differential pair
(See note 4)
All Pins: Material - Copper Alloy
Finish: Matte Tin over Nickel plate
3
4
5
6
7
8
9
SHARE(-)
Vin(–)
Vout(–)
SENSE(–)
TRIM
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
5)
6)
Undimensioned components are shown for visual reference only.
All dimensions in inches (mm)
'Tolerances: x.xx +/-0.02 in. (x.x +/-0.5mm)
x.xxx +/-0.010 in. (x.xx +/-0.25mm)
Open Frame Weight:2.6 oz. (75 g)
SENSE(+)
Vout(+)
7)
8)
9)
Workmanship: Meets or exceeds IPC-A-610 Class II
Notes:
1)
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.
SENSE(–) should be connected to Vout(–) either remotely or at the converter.
Leave TRIM pin open for nominal output voltage.
2)
3)
SENSE(+) should be connected to Vout(+) either remotely or at the converter.
4)
Full-Featured option only. Pin 3 and Pin B not populated on standard model.
Product # PQ60240HZx25
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0005987 Rev. D
03/04/14
Page 2
Input: 35-75V
Output: 24V
Current: 25A
Encased Mechanical
Package: Half-brick
2.486 .020 [63.14
0.5]
2.00 [50.8 ]
1.400 [35.56 ]
1.000 [25.4 ]
.700 [17.78 ]
.400 [10.16 ]
SIDE VIEW
+.002
.512
-.005
.163
[4.14 ]
+0.05
-0.12
13
[
]
OVERALL
HEIGHT
.243 .020
[6.17 0.5]
9
8
7
6
5
.243 .020
[6.17 0.5]
2.386 .020
[60.6
0.5]
TOP VIEW
1.90
[48.3 ]
1.90
[48.3 ]
.233 .020
[5.92
0.5]
1
2
B
3
4
+.007
.027
THRU HOLE
M3 (SEE NOTE 8)
STANDOFFS (4)
-.010
+0.17
.400 [10.16 ]
0.69
[
-0.25
]
.800 [20.32 ]
1.00 [25.4 ]
BOTTOMSIDE CLEARANCE
.543 .020
1.400 [35.56 ]
NOTES
PIN DESIGNATIONS
1)
Applied torque per screw should not exceed 6in-lb. (0.7 Nm).
Pin
Name
Function
1
Vin(+)
Positive input voltage
2)
3)
Baseplate flatness tolerance is 0.004" (.10 mm) TIR for surface.
TTL input to turn converter on and off,
referenced to Vin(–), with internal pull up.
2
ON/OFF
Pins 1-4, 6-8, and B are 0.040” (1.02mm) diameter, with 0.080”
(2.03mm) diameter standoff shoulders.
B
SHARE(+)
Active current share differential pair
(See note 4)
4)
5)
Pins 5 and 9 are 0.080” (2.03 mm) diameter with 0.125”
(3.18 mm) diameter standoff shoulders.
3
4
5
6
7
8
9
SHARE(-)
Vin(–)
Vout(–)
SENSE(–)
TRIM
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
All Pins: Material - Copper Alloy; Finish - Matte Tin over Nickel plate
6)
7)
8)
9)
Undimensioned components are shown for visual reference only.
Weight: 5 oz. (142g) typical
Threaded and Non-Threaded options available
All dimensions in inches (mm).
Tolerances:
x.xx +/-0.02 in. (x.x +/-0.5mm)
x.xxx +/-0.010 in. (x.xx +/-0.25mm)
unless otherwise noted.
SENSE(+)
Vout(+)
Notes:
1)
SENSE(–) should be connected to Vout(–) either remotely or at the converter.
Leave TRIM pin open for nominal output voltage.
2)
3)
SENSE(+) should be connected to Vout(+) either remotely or at the converter.
10)
Recommended pin length is 0.03" (0.76 mm) greater than the PCB
thickness.
4)
Full-Featured option only. Pin 3 and Pin B not populated on standard model.
11) Workmanship: Meets or exceeds IPC-A-610C Class II
Product # PQ60240HZx25
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0005987 Rev. D
03/04/14
Page 3
Input: 35-75V
Output: 24V
Current: 25A
Technical Specifications
Package: Half-brick
PQ60240HZx25 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
ABSOLUTE MAXIMUM RATINGS
Min.
Typ.
Max. Units Notes & Conditions
Input Voltage
Non-Operating
Operating
Operating Transient Protection
Isolation Voltage
-1
100
80
100
V
V
V
Continuous
Continuous
1 s transient, square wave
Input to Output
Operating Temperature
Storage Temperature
2250
100
125
18
V
°C
°C
V
-40
-45
-2
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 (Option N)
Disabled Input Current (Option P)
Response to Input Transient
Input Reflected Ripple Current
Input Terminal Ripple Current
Recommended Input Fuse
Recommended External Input Capacitance
Input Filter Component Values (C1\Lin\C2)
OUTPUT CHARACTERISTICS
Output Voltage Set Point
Output Voltage Regulation
Over Line
35
48
75
V
32.0
30.0
1.5
33.0
31.0
2.0
34.0
32.0
2.5
21
250
8
V
V
V
A
100% Load, 35V Vin, trimmed up 10%
200
5
30
4.5
30
150
mA
mA
mA
V
mA
mA
A
20
40
0.50V/μs input transient, full load, 100μF load cap
RMS thru 4.7μH inductor
RMS
Fast acting external fuse recommended
Typical ESR 0.1-0.2Ω; Figure 13
40
220
22\0.75\11
µF
nF\µH\µF Internal values
23.60
24.00
24.34
V
±0.25
±0.25
%
%
mV
V
See note 1
See note 1
Over Load
Over Temperature
Total Output Voltage Range
Output Voltage Ripple and Noise
Peak-to-Peak
-312
23.28
312
24.72
Over sample, line, load, temperature & life
20MHz bandwidth; see Note 2
Full load
280
65
560
130
25
mV
mV
A
RMS
Full load
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 Electrolytic
EFFICIENCY
0
27.5
Subject to thermal derating
Output Voltage 10% Low
See note 3
Negative current drawn from output
Negative current drawn from output
Nominal Vout at full load (resistive load)
30.0
9.6
8
32.5
A
V
A
mA
µF
0
3
5
6,000
100% Load
50% Load
94
95
%
%
Figures 1 - 2
Figures 1 - 2
Product # PQ60240HZx25
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0005987 Rev. D
03/04/14
Page 4
Input: 35-75V
Output: 24V
Current: 25A
Technical Specifications
Package: Half-brick
PQ60240HZx25 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.
Max. Units Notes & Conditions
DYNAMIC CHARACTERISTICS
Output Voltage during Load Current Transient
Step Change in Output Current (0.1A/µs)
Step Change in Output Current (2A/µs)
Settling time
800
1.5
500
mV
V
µs
50% to 75% to 50% Iout max, 15 μF load cap
50% to 75% to 50% Iout max, 15 μF load cap
To within 1% Vout nom
Turn-On Transient
Turn-On Time
Output Voltage Overshoot
15
25
35
2
ms
%
Vout=90% nom, Figures 9 & 10; see note 5
ISOLATION CHARACTERISTICS
Isolation Voltage (dielectric strength)
Isolation Resistance
2250
30
1000
V
MΩ
pF
See Absolute Maximum Ratings
See Note 4
Isolation Capacitance (input to output)
TEMPERATURE LIMITS FOR POWER DERATING CURVES
Semiconductor Junction Temperature
Board Temperature
125
125
125
°C
°C
°C
Package rated to 150°C
UL rated max operating temp 130°C
Transformer Temperature
FEATURE CHARACTERISTICS
Switching Frequency Regulation Stage
Switching Frequency Isolation Stage
ON/OFF Control (Option P)
Off-State Voltage
230
115
240
120
250
125
kHz
kHz
-2.0
2.4
0.8
18.0
V
V
On-State Voltage
ON/OFF Control (Option N)
Off-State Voltage
On-State Voltage
2.4
-2.0
18.0
0.8
V
V
ON/OFF Control (Either Option)
Pull-Up Voltage
Application notes; Figures A & B
15
18
V
Pull-Up Resistance
49.9
kΩ
%
%
°C
°C
Output Voltage Trim Range
Output Over-Voltage Protection
Over-Temperature Shutdown
Over-Temperature Shutdown Restart Hysteresis
RELIABILITY CHARACTERISTICS
Calculated MTBF (Telcordia)
Calculated MTBF (MIL-217)
Field Demonstrated MTBF
-50
118
10
128
Measured across Pins 8 & 6; Figure C
Over Full Temperature Range; % of nominial Vout
Average PCB Temperature
123
125
10
2.1
1.9
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: 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: support@synqor.com)
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.
Note 5: Additional 25ms between enable and start of Turn-On time for N logic full-featured units to set up communication.
Product # PQ60240HZx25
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0005987 Rev. D
03/04/14
Page 5
Input: 35-75V
Output: 24V
Current: 25A
Technical Specifications
Package: Half-brick
Standards Compliance & Qualification Testing
Parameter
STANDARDS COMPLIANCE
Notes & Conditions
UL 60950-1:R2011-12
Basic insulation
EN60950-1/A12:2011
CAN/CSA-C22.2 No. 60950-1/A1:2011
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
# Units Test Conditions
32
95% rated Vin and load, units at derating point, 1000 hours
Vibration
5
5
10
5
5
5
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
Mechanical Shock
Temperature Cycling
Power/Thermal Cycling
Design Marginality
Humidity
-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, 95% RH, 1000 hours, continuous Vin applied except 5 min/day
MIL-STD-883, method 2003
Solderability
15 pins
Product # PQ60240HZx25
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0005987 Rev. D
03/04/14
Page 6
Input: 35-75V
Output: 24V
Current: 25A
Technical Figures
Package: Half-brick
100
95
90
85
80
75
70
65
60
100
95
90
85
80
75
70
65
60
25º C
40º C
55º C
35 Vin
48 Vin
75 Vin
100
200
300
400
0
5
10
15
20
25
Load Current (A)
Air Flow (LFM)
Figure 1: Efficiency at nominal output voltage vs. load current for minimum,
nominal, and maximum input voltage at 25°C.
Figure 2: Efficiency at nominal output voltage and 60% rated power vs. airflow
rate for ambient air temperatures of 25°C, 40°C, and 55°C (nominal input
voltage).
80
70
60
50
40
30
80
70
60
50
25º C
40
40º C
55º C
30
20
20
10
0
35 Vin
48 Vin
10
75 Vin
0
100
200
300
400
0
5
10
15
20
25
Load Current (A)
Air Flow (LFM)
Figure 3: Power Dissipation at nominal output voltage vs. load current for
minimum, nominal, and maximum input voltage at 25°C.
Figure 4: Power Dissipation at nominal output voltage and 60% rated power
vs. airflow rate for ambient air temperatures of 25°C, 40°C, and 55°C (nominal
input voltage).
30
25
20
15
10
5
400LFM(2.0m/s)
300LFM(1.5m/s)
200LFM(1.0m/s)
100LFM(0.5 m/S)
0
25
40
55
70
85
Ambient Air Temperature(°C)
Figure 5: Thermal Derating (max output current vs. ambient air temperature)
for airflow rates of 100 LFM through 400 LFM with air flowing from pin 4 to pin
1 (nominal input voltage).
Figure 6: Thermal Image of converter at 13.9 amp load current (333.6W)
with 55°C air flowing at the rate of 200 LFM. Air is flowing from pin 4 to pin 1
(nominal input voltage).
Product # PQ60240HZx25
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0005987 Rev. D
03/04/14
Page 7
Input: 35-75V
Output: 24V
Current: 25A
Technical Figures
Package: Half-brick
30
25
20
15
400LFM(2.0m/s)
10
300LFM(1.5m/s)
200LFM(1.0m/s)
5
100LFM(0.5 m/S)
0
25
40
55
70
85
Ambient Air Temperature(°C)
Figure 7: Thermal Derating (max output current vs. ambient air temperature)
for airflow rates of 100 LFM through 400 LFM with air flowing lenghtwise from
input to output (nominal input voltage).
Figure 8: Thermal Image of converter at 13.5 amp load current (324W) with
55°C air flowing at the rate of 200 LFM. Air is flowing across the converter
from input to output (nominal input voltage).
Figure 9: Turn-on Transient at full load (resistive load) (20 ms/div). Input
voltage pre-applied. Top Trace: Vout (10V/div). Bottom Trace: ON/OFF
input(10V/div)
Figure 10: Turn-on Transient at zero load (20 ms/div). Top Trace: Vout (10V/
div). Bottom Trace: ON/OFF input (10V/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: 1µF ceramic and 15µF
tantalum output capacitors. Top trace: Vout (1V/div). Bottom trace: Iout (10A/
div).
Figure 12: Output Voltage Response to Step-Change in Load Current (50%-
75%-50% of Iout(max): dI/dt = 2A/µs). Load cap: 1µF ceramic and 15µF
tantalum output capacitors. Top trace: Vout (2V/div). Bottom trace: Iout (10A/
div).
Product # PQ60240HZx25
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0005987 Rev. D
03/04/14
Page 8
Input: 35-75V
Output: 24V
Current: 25A
Technical Figures
Package: Half-brick
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 4.7µH source impedance and 220µF electrolytic
capacitor (Ch.1 500mA/div, 2µs/div). (See Figure 13).
Figure 15: Input Reflected Ripple Current, is, through a 4.7 µH source inductor
at nominal input voltage and rated load current (10 mA/div, 2µs/div). (See
Figure 13).
Figure 16: Output Ripple voltage at nominal input voltage and rated load
current (200 mV/div, 2µs/div). Load capacitance: 1µF ceramic and 15µF
tantalum output capacitors. Bandwidth: 20 MHz. (See Figure 13).
25
20
15
10
Current-Limit
Shutdown
5
0
35Vin
48Vin
75Vin
0
5
10
15
20
25
30
35
Load Current (A)
Figure 17: Output I-V Characteristics (output voltage vs. load current) showing
typical current limit curves and converter shutdown points.
Figure 18: Output Short Load Current (20A/div) as a function of time when the
converter attempts to turn on into a 1 mΩ short circuit (20ms/div).
Product # PQ60240HZx25
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0005987 Rev. D
03/04/14
Page 9
Input: 35-75V
Output: 24V
Current: 25A
Applications Section
Package: Half-brick
BASIC OPERATION AND FEATURES
CONTROL FEATURES
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(-).
In negative logic versions, the ON/OFF signal is active low (meaning
that a low voltage turns the converter on). In positive logic versions,
the ON/OFF input is active high (meaning that a high voltage turns
the converter on). Figure A details possible circuits for driving the
ON/OFF pin. Figure B is a detailed look of the internal ON/OFF
circuitry. See Ordering Information page for available enable logics.
REMOTE SENSE Pins 8(+) and 6(-): The SENSE(+) and SENSE(-)
inputs correct for voltage drops along the conductors that connect
the converter’s output pins to the load.
This converter series 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.
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
converter to achieve high efficiency.
Dissipation throughout the converter is so low that it does not
require a heatsink or even a baseplate for operation in many
applications;however, addingaheatsinkprovidesimprovedthermal
derating performance in extreme situations. To further withstand
harsh environments and thermally demanding applications, certain
models are available totally encased. See Ordering Information
page for available thermal design options.
Pin 8 should be connected to Vout(+) and Pin 6 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 output (Pins 9 and 5) to determine when it should trigger,
not the voltage across the converter’s sense leads (Pins 8 and 6).
Therefore, the resistive drop on the board should be small enough
so that output OVP does not trigger, even during load transients.
SynQor half-brick converters use the industry standard footprint
and pin-out.
ON/OFF
ON/OFF
ON/OFF
OUTPUT VOLTAGE TRIM (Pin 7): 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 7 (TRIM) and Pin 6 (SENSE(–) input). For a desired
decrease of the nominal output voltage, the value of the resistor
should be:
Vin(_)
Vin(_)
Vin(_)
Remote Enable Circuit
Negative Logic
(Permanently
Enabled)
Positive Logic
(Permanently
Enabled)
5V
ON/OFF
100%
– 2
TTL/
CMOS
Rtrim-down =
(
|
)
kΩ
ON/OFF
Vin(_)
Δ%
where
Vin(_)
Open Collector Enable Circuit
Vnominal – Vdesired
Direct Logic Drive
Δ% =
|
× 100%
Figure A: Various circuits for driving the ON/OFF pin.
Vnominal
18V(max)
50k
5V
To increase the output voltage, the user should connect a resistor
between Pin 7 (TRIM) and Pin 8 (SENSE(+) input). For a desired
increase of the nominal output voltage, the value of the resistor
should be:
ON/OFF
10k
TTL
Vnominal
– 2
(
)
× Vdesired + Vnominal
kΩ
Rtrim-up =
1.225
Vdesired – Vnominal
Vin(_)
Figure B: Internal ON/OFF pin circuitry
Product # PQ60240HZx25
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0005987 Rev. D
03/04/14
Page 10
Input: 35-75V
Output: 24V
Current: 25A
Applications Section
Package: Half-brick
The Trim Graph in Figure C shows 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.
Protection Features
Input Under-Voltage Lockout (UVLO): 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. When the input is rising, it must exceed
the typical “Turn-On Voltage Threshold”* before the converter will
turn on. Once the converter is on, the input must fall below the
typical "Turn-Off Voltage Threshold"* before the converter will
turn off.
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.
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.
Output Current Limit (OCP): If the output current exceeds
the “Output DC Current Limit Inception” value*, 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 50 ms, then the unit will enter into hiccup mode, with a 500
ms off-time. The unit will then automatically attempt to restart.
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 Over-
Voltage Protection” threshold*, then the unit will shut down.
Output Over-Voltage Limit (OVP): 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 500 ms the converter will automatically restart
for all but the S Feature Set option, which is latching and will not
restart until input power is cycled or the ON/OFF input is toggled.
100,000.0
10,000.0
1,000.0
100.0
10.0
1.0
0.1
0.0
0
5
10
15
20
25
30
35
40
45
50
% increase Vout
% decrease Vout
Figure C: Trim Graph
During an output over-voltage condition, the converter's LED will
illuminate. For units with latching OVP (S Feature Set), once
the over-voltage condition has been removed the LED will flash
steadily until the input power or the ON/OFF input is toggled.
Over-Temperature Shutdown (OTP): A thermister 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”*.
Startup Inhibit Period: The Startup Inhibit Period ensures that
the converter will remain off for approximately 500 ms when it is
shut down due to a fault. This generates a 2 Hz “hiccup mode,”
preventing the converter from overheating. There are multiple
ways the converter can be shut down, initiating a Startup Inhibit
Period:
• Output Over-Voltage Protection
• Current Limit
• Short Circuit Protection
* See Electrical Characteristics section.
Product # PQ60240HZx25
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0005987 Rev. D
03/04/14
Page 11
Input: 35-75V
Output: 24V
Current: 25A
Applications Section
Package: Half-brick
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.
Thermal Considerations: For baseplated and encased versions,
the max operating baseplate temperature, TB, is 100ºC. Refer to
the Thermal Derating Curves in the Technical Figures section to
see the available output current at baseplate temperatures below
100ºC.
A power derating curve can be calculated for any heatsink that is
attached to the base-plate of the converter. It is only necessary to
determine the thermal resistance, RTHBA, of the chosen heatsink
between the baseplate and the ambient air for a given airflow rate.
This information is usually available from the heatsink vendor. The
following formula can the be used to determine the maximum
power the converter can dissipate for a given thermal condition if
its base-plate is to be no higher than 100ºC.
Application Circuits: A typical circuit diagram, Figure D below
details the input filtering and voltage trimming.
Input Filtering and External Input Capacitance: Figure
E 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 of the Electrical Specifications. More
detailed information is available in the application note titled “EMI
Characteristics” on the SynQor website.
max
diss
100ºC - TA
RTHBA
=
P
This value of maximum power dissipation can then be used in
conjunction with the data shown in the Power Dissipation Curves
in the Technical Figures section to determine the maximum load
current (and power) that the converter can deliver in the given
thermal condition.
Output Filtering and External Output Capacitance: The
internal output filter components are shown in Figure E below. This
filter dramatically reduces output voltage ripple. Some minimum
external output capacitance is required, as specified in the Output
Characteristics area of the Electrical Characteristics section. No
damage will occur without this capacitor connected, but peak
output voltage ripple will be much higher.
For convenience, Thermal Derating Curves are provided in the
Technical Figures section.
Vout(+)
Vsense(+)
Rtrim-up
Vin(+)
Electrolytic
Capacitor
External
Input
Filter
Vin
Trim
or
ON/OFF
Cload
Rtrim-down
Iload
Vsense(_)
Vout(_)
Vin(_)
Figure D: Typical Application Circuit (negative logic unit, permanently enabled).
Lin
Vin(+)
Vout(+)
Vout(-)
Regulation
Stage
Current
Sense
Isolation
Stage
C2
C1
Vin(_)
Figure E: Internal Input and Output Filter Diagram (component values listed in Electrical Characteristics section)
Product # PQ60240HZx25
Phone 1-888-567-9596
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Doc.# 005-0005987 Rev. D
03/04/14
Page 12
Input: 35-75V
Output: 24V
Current: 25A
Applications Section
Package: Half-brick
Active Current Share Application Section
Overview: The full-featured option, which is specified by an “F” as
the last character of the part number, supports current sharing by
adding two additional pins: SHARE(+) and SHARE(-)
• Input power pins and output power pins should be tied
together between units, preferably with wide overlapping
copper planes, after any input common-mode choke.
• The SHARE(+) and SHARE(-) pins should be routed
between all paralleled units as a differential pair.
• The ON/OFF pins should be connected in parallel, and rise/fall
times should be kept below 2 ms.
• The SENSE(+) and SENSE(-) pins should be connected either
locally at each unit or separately to a common sense point. If
an output common-mode choke is used, sense lines should be
connected on the module-side of the choke.
Connection of Paralleled Units: Up to 100 units can be placed
in parallel. In this current share architecture, one unit is dynamically
chosen to act as a master, controlling all other units. It cannot be
predicted which unit will become the master at any given time, so
units should be wired symmetrically (see Figures F & G).
• If the TRIM pin is used, then each unit should have its own
trim resistor connected locally between TRIM and SENSE(+)
or SENSE(-).
470 nH (nom)
Vin(+)
Vout(+)
Sense(+)
A
B
On/Off
A
B
≥1 nF
Share(+)
Share(-)
Trim
Load
≥10 μF
Elec.
Cap.
Sense(-)
Vout(-)
Vin(-)
470 nH (nom)
Vin(+)
On/Off
Vout(+)
Sense(+)
A
B
Electrolytic
Capacitor
Share(+)
Share(-)
Trim
≥10 μF
Sense(-)
Vout(-)
Vin(-)
Up to 100 Units
470 nH (nom)
Vin(+)
On/Off
Vout(+)
Sense(+)
A
B
Electrolytic
Capacitor
Share(+)
Share(-)
Trim
≥10 μF
Sense(-)
Vout(-)
Vin(-)
Figure F: Typical Application Circuit for Paralleling of Full-Featured Units with an Input Common-Mode Choke. If an input common-mode choke is used, Vin(-)
MUST be tied together AFTER the choke for all units. 470 nH (nominal) inductor or an output common-mode choke is required for outputs >18 V. See Figure G for
output common-mode choke configuration.
Product # PQ60240HZx25
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0005987 Rev. D
03/04/14
Page 13
Input: 35-75V
Output: 24V
Current: 25A
Applications Section
Package: Half-brick
Automatic Configuration: The micro-controller inside each power
converter unit is programmed at the factory with a unique chip number.
In every other respect, each shared unit is identical and has the same
orderable part number.
RS-485 Physical Layer: The internal RS-485 transceiver includes
many advanced protection features for enhanced reliability:
• Current Limiting and Thermal Shutdown for
Driver Overload Protection
On initial startup (or after the master is disabled or shuts down),
each unit determines the chip number of every other unit currently
connected to the shared serial bus formed by the SHARE(+) and
SHARE(-) pins. The unit with the highest chip number dynamically
reconfigures itself from slave to master. The rest of the units (that do
not have the highest chip number) become slaves.
• IEC61000 ESD Protection to +/- 16.5 kV
• Hot Plug Circuitry – SHARE(+) and SHARE(-)
Outputs Remain Tri-State During Power-up/Power-down
Internal Schottky Diode Termination: Despite signaling at high
speed with fast edges, external termination resistors are not necessary.
Each receiver has four Schottky diodes built in, two for each line in the
differential pair. These diodes clamp any ringing caused by transmission
line reflections, preventing the voltage from going above about 5.5 V
or below about -0.5 V. Any subsequent ringing then inherently takes
place between 4.5 and 5.5 V or between -0.5 and 0.5 V. Since each
receiver on the bus contains a set of clamping diodes to clamp any
possible transmission line reflection, the bus does not necessarily need
to be routed as a daisy-chain.
The master unit then broadcasts its control state over the shared serial
bus on a cycle-by-cycle basis. The slave units interpret and implement
the control commands sent by the master, mirroring every action of
the master unit.
If the master is disabled or encounters a fault condition, all units will
immediately shut down, and if the master unit is unable to restart,
then the unit with the next highest chip number will become master. If
a slave unit is disabled or encounters a fault condition, all other units
continue to run, and the slave unit can restart seamlessly.
Automatic Interleaving: The slave units automatically lock
frequency with the master, and interleave the phase of their switching
transitions for improved EMI performance. To obtain the phase angle
relative to the master, each slave divides 360 degrees by the total
number of connected units, and multiples the result by its rank among
chip numbers of connected units.
Pins SHARE(+) and SHARE(-) are referenced to Vin(-), and therefore
should be routed as a differential pair near the Vin(-) plane for optimal
signal integrity. The maximum difference in voltage between Vin(-
) pins of all units on the share-bus should be kept within 0.3 V to
prevent steady-state conduction of the termination diodes. Therefore,
the Vin(-) connections to each unit must be common, preferably
connected by a single copper plane.
Share Accuracy: Inside each converter micro-controller, the duty
cycle is generated digitally, making for excellent duty cycle matching
between connected units. Some small duty cycle mismatch is caused
by (well controlled) process variations in the MOSFET gate drivers.
However, the voltage difference induced by this duty cycle mismatch
appears across the impedance of the entire power converter, from
input to output, multiplied by two, since the differential current flows
out of one converter and into another. So, a small duty cycle mismatch
yields very small differential currents, which remain small even when
100 units are placed in parallel.
ORing Diodes placed in series with the converter outputs must also
have a resistor smaller than 500 Ω placed in parallel. This resistor
keeps the output voltage of a temporarily disabled slave unit consistent
with the active master unit. If the output voltage of the slave unit
were allowed to totally discharge, and the slave unit tried to restart, it
would fail because the slave reproduces the duty cycle of the master
unit, which is running in steady state and cannot repeat an output
voltage soft-start.
Common-Mode Filtering must be either a single primary side choke
handling the inputs from all the paralleled units, or multiple chokes
placed on the secondary side. This ensures that a solid Vin(-) plane
is maintained between units. Adding a common-mode choke at the
output eliminates the need for the 470 nH indcutor at the output of
shared units when Vout > 18 V. If an output common-mode choke
is used, sense connections must be made on the module-side of the
choke.
In other current-sharing schemes, it is common to have a current-
sharing control loop in each unit. However, due to the limited bandwidth
of this loop, units do not necessarily share current on startup or during
transients before this loop has a chance to respond. In contrast, the
current-sharing scheme used in this product has no control dynamics:
control signals are transmitted fast enough that the slave units can
mirror the control state of the master unit on a cycle-by-cycle basis,
and the current simply shares properly, from the first switching cycle
to the last.
Resonance Between Output Capacitors is Possible: When
multiple higher-voltage modules are paralleled, it is possible to
excite a series resonance between the output capacitors internal to
the module and the parasitic inductance of the module output pins.
This is especially likely at higher output voltages where the module
internal capacitance is relatively small. This problem is independent
of external output capacitance. For modules with an output voltage
greater than 18 V, to ensure that this resonant frequency is below the
switching frequency it is recommended to add a nominal 470 nH of
inductance, located close to the module, in series with each converter
output. There must be at least 10 ¼F of capacitance per converter,
located on the load-side of that inductor. The inductance could be from
the leakage inductance of a secondary-side common-mode choke; in
which case the output capacitor should be appropriately sized for the
chosen choke. When using an output common-mode choke, the Sense
lines must be connected on the module-side of the common-mode
choke (see Figure G).
Product # PQ60240HZx25
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0005987 Rev. D
03/04/14
Page 14
Input: 35-75V
Output: 24V
Current: 25A
Package: Half-brick
Vin(+)
On/Off
Vout(+)
Sense(+)
≥1 nF
Share(+)
Share(-)
Trim
Load
Elec.
Cap.
Sense(-)
Vout(-)
Vin(-)
Vin(+)
On/Off
Vout(+)
Sense(+)
Electrolytic
Capacitor
Share(+)
Share(-)
Trim
Sense(-)
Vout(-)
Vin(-)
Up to 100 Units
Vin(+)
On/Off
Vout(+)
Sense(+)
Electrolytic
Capacitor
Share(+)
Share(-)
Trim
Sense(-)
Vout(-)
Vin(-)
Figure G: Typical Application Circuit for Paralleling of Full-Featured Units with an Output Common-Mode Choke. When using an output common-mode choke,
SENSE lines must be connected on the module-side of the choke. See Figure F for configuration with an input common-mode choke.
Product # PQ60240HZx25
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0005987 Rev. D
03/04/14
Page 15
Technical
Specification
PQ60240HZx25
Ordering Information
Part Numbering System
Ordering Information
The part numbering system for SynQor’s dc-dc converters follows the format
shown in the example below.
The tables below show the valid model numbers and ordering options for
converters in this product family. When ordering SynQor converters, please
ensure that you use the complete 15 character part number consisting of
the 12 character base part number and the additional characters for options.
Add “-G” to the model number for 6/6 RoHS compliance.
PQ 60 240 H Z A 25 N R A - G
6/6 RoHS
Output
Voltage
24V
Max Output
Current
25A
Model Number
Input Voltage
35-75V
Options (see
Ordering Information)
PQ60240HZw25xyz-G
Output Current
Thermal Design
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.
Options Description: w x y z
Thermal Design
Enable Logic Pin Style
Feature Set
Output Voltage
A - Open Frame
C - Encased
D - Encased with Non-
Threaded Baseplate
K - 0.110"
N - 0.145" A - Standard
R - 0.180" F - Full Featured
Y - 0.250"
N - Negative
P - Positive
Input Voltage
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.
Not all combinations make valid part numbers, please contact SynQor for
availability. See the Product Summary web page for more options.
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 rohs@synqor.com.
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.
5,999,417
6,894,468
7,119,524
7,765,687
6,222,742
6,896,526
7,269,034
7,787,261
6,545,890
6,927,987
7,272,021
8,023,290
6,577,109
7,050,309
7,272,023
8,149,597
6,594,159
7,072,190
7,558,083
8,493,751
6,731,520
7,085,146
7,564,702
Contact SynQor for further information and to order:
Phone:
978-849-0600
Toll Free: 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.
Fax:
978-849-0602
power@synqor.com
www.synqor.com
E-mail:
Web:
Address: 155 Swanson Road
Boxborough, MA 01719
USA
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.
Product # PQ60240HZx25
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0005987 Rev. D
03/04/14
Page 16
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