9.6A/250W

Technical
Specification
PQ60260HTB10
48Vin
26Vout
250W
2000Vdc
Half-brick
Input
Output
Power
Isolation
DC/DC Converter
The PQ60260HTB10 PowerQor® Tera converter is a nextgeneration, board-mountable, isolated, fixed switching
frequency dc/dc converter that uses synchronous rectification to achieve extremely high conversion efficiency.
The power dissipated by the converter is so low that a
heatsink is not required. However, this unit provides a
baseplate for clamshell applications and optional heatsinking in severe thermal environments. The Tera series
converters offer the maximum usable current output for
any standard “half-brick” module. The Tera units also
feature active current sharing for N+1 and parallel applications. RoHS Compliant see last page.
PQ60260HTB10 Module
Control Features
Operational Features
•Ultra-high efficiency, 92% at full rated load current
•Delivers up to 250 Watts of output power with minimal derating - heatsink optional
•Wide input voltage range: 35V – 75V, with 100V
100ms input voltage transient capability
•Fixed frequency switching provides predictable EMI
performance
• On/Off control referenced to input side (positive and
negative logic options are available)
• Remote sense for the output voltage compensates for
output distribution drops
• Output voltage trim permits custom voltages and voltage
margining
Protection Features
Mechanical Features
•Industry standard half-brick pin-out configuration
•Industry standard size: 2.3” x 2.4” (58.4 x 61.0mm)
•Total height 0.50” (12.7mm)
•Baseplate allows heatsink attachment or “clamshell”
configuration
•Total weight: 4.3 oz (122 g)
Optional Features (full-feature)
Safety Features
•2000V, 30 MW input-to-output isolation
•UL/cUL 60950-1 recognized (US & Canada), basic
insulation rating
•TUV certified to EN60950-1
•Meets 72/23/EEC and 93/68/EEC directives
•Meets UL94V-0 flammability requirements
Product # PQ60260HTB10
• Input under-voltage lockout disables converter at low
input voltage conditions
• Output current limit and short circuit protection
• Active back bias limit prevents damage to converter
from external load induced pre-bias
• Output over-voltage protection
• Thermal shutdown
Phone 1-888-567-9596
• Active current share for N+1 and parallel applications
• External Clock Synchronization pin for better EMI characteristics
• Startup Synchronization pin for more consistent start-up
sequence
• ORing FET drive supply for efficient ORing protection
www.synqor.com
Doc.# 005-2HTB26F Rev. H
10/10/08
Page 1
Input:
Output:
Current:
Package:
Technical Specification
MECHANICAL DIAGRAM
35-75 V
26 V
9.6 A (250W)
Half-brick
2.40
(61.0)
2.00
(50.8)
1.400
(35.56)
0.20
(5.1)
1.000
(25.40)
0.20
0.700
(5.1)
(17.78)
0.400
(10.16)
Side View
Top View
0.50
(12.7)
1.90
(48.3)
2.30
Bottom side
Clearance
0.19
(58.4)
.065 +.020/-.023
(1.65 +.51/-.58)
1.90
(48.3)
M3 Threaded
Standoff Ref.
(4.8)
0.12 typ.
(3.0)
See Note 4
M3 Threaded
Standoff
4 Places
See Note 5
0.400
(10.16)
0.600
(15.24)
Pin Farside
Typical
0.800
(20.32)
1.000
(25.40)
0.50
(12.7)
1.400
(35.56)
NOTES
1) Pins 1-4, 6-8, A, B 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) Pins 3, A & B only included in Full-Feature models.
4) Pin length shown corresponds to pin with 0.145” extension.
Other pin extension lengths available. Recommended pin length is 0.03” (0.76mm) greater than the PCB thickness.
5) Applied torque per screw should not exceed 3 in-lb (.33Nm)
6) Baseplate flatness tolerance is 0.004” (0.10mm) TIR for surface.
7) All Pins: Material - Copper Alloy
Finish (5/6 RoHS) - Tin/Lead over Nickel plate
Finish (6/6 RoHS) - Tin over Nickel plate
8) Undimensioned components are shown for visual reference only.
9) All dimensions in inches (mm)
Tolerances: x.xx +/-0.02 in. (x.x +/-0.5mm)
x.xxx +/-0.010 in. (x.xx +/-0.25mm)
10) Weight: 4.3 oz (122 g) typical
11) Workmanship: Meets or exceeds IPC-A-610C Class II
Product # PQ60260HTB10
Phone 1-888-567-9596
PIN DESIGNATIONS
Pin No. 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
I share
Single wire parallel signal
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
A
Clock Sync
Clock synchronization
B
Start Sync
Startup synchronization
www.synqor.com
Pins in Italics Shaded text are Optional
Doc.# 005-2HTB26F Rev. H
10/10/08
Page 2
Input:
Output:
Current:
Package:
Technical Specification
35-75 V
26 V
9.6 A (250W)
Half-brick
PQ60260HTB10 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 ABSOLUTE MAXIMUM RATINGS
Input Voltage
Non-Operating
Operating
Operating Transient Protection
Isolation Voltage (input to output)
Operating Temperature
Storage Temperature
Voltage at ON/OFF input pin
Voltage at Clock Sync pin
INPUT CHARACTERISTICS
Operating Input Voltage Range
Input Under-Voltage Lockout
Turn-On Voltage Threshold
Turn-Off Voltage Threshold
Lockout Voltage Hysteresis
Maximum Input Current
No-Load Input Current
Disabled Input Current
Inrush Current Transient Rating
Response to Input Transient
Input Reflected Ripple Current
Recommended Input Fuse
Input Filter Component Values (C1\L\C2)
Recommended External Input Capacitance
OUTPUT CHARACTERISTICS
Output Voltage Set Point
Output Voltage Regulation
Over Line
Over Load
Over Temperature
Total Output Voltage Range
Output Voltage Ripple and Noise1
Peak-to-Peak
RMS
Operating Output Current Range
Output DC Current-Limit Inception
Output DC Current-Limit Shutdown Voltage
Short-Circuit Current-Limit
Current Share Accuracy (2 units paralleled)
Back-Drive Current Limit while Enabled
Back-Drive Current Limit while Disabled
Maximum Output Capacitance
DYNAMIC CHARACTERISTICS
Input Voltage Ripple Rejection
Output Voltage during Load Current Transient
For a Step Change in Output Current (0.1A/µs)
For a Step Change in Output Current (5A/µs)
Settling Time
Turn-On Transient
Turn-On Time
Start-Up Inhibit Time
Output Voltage Overshoot
Min.
Typ.
Max.
-40
-55
-2
-15
100
80
100
2000
100
125
18
18
V
V
V
V
°C
°C
V
V
35
48
75
V
30.6
28.2
2.3
32.5
30.1
2.4
115
2
1.5
20
1.6\4\3.3
47
34.4
32.1
2.5
8.5
150
5
0.01
20
26.0
26.4
25.6
25.12
0
10.2
0.1
0
Units Notes & Conditions
Continuous
Continuous
100ms transient, square wave
Basic insulation, Pollution degree 2
Applies to Full Feature option only
V
V
V
A
100% Load, 35 Vin
mA
mA
A 2s
V
1000V/ms input transient; Figure 16
mA
RMS thru 10µH inductor; Figures 11 & 13
A
Fast blow external fuse recommended
µF\µH\µF Internal values; see Figure E
µF
Typical ESR 0.1-0.2W; see Figure 11
V
+0.1 \ 30 +0.15 \ 40 %\mV
+0.1 \ 30 +0.15 \ 40 %\mV
+150
+300
mV
26.98
V
50
90
mV
15
30
mV
9.6
A
11.0
12.0
A
2.0
V
20
A
+2
+5
%
0.2
0.6
A
10
50
mA
5,000
µF
Over sample, line, load, temperature & life
20MHz bandwidth; Figures 11 & 14
Full Load; see Figures 11 & 14
Full Load; see Figures 11 & 14
Output Voltage 10% Low; Figure 6
% of rated output current
Negative current drawn from output
Negative current drawn from output
26Vout at 9.6A Resistive Load
60
750
500
300
dB
mV
mV
µs
120 Hz; Figure 18
180
25
200
0
40
240
ms
ms
%
Full load, Vout=90% nom.; Figures 7 & 8
-40°C to +125°C; Figure A
5,000 µF load capacitance, Iout = 0A
100% Load
50% Load
92
92.5
%
%
Figures 1 - 4
Figures 1 - 4
Baseplate Temperature
100
°C
Figures 5
Isolation Voltage (dielectric strength)
Isolation Resistance
Isolation Capacitance2
2000
30
3300
V
MW
pF
EFFICIENCY
TEMPERATURE LIMITS FOR POWER DERATING CURVES
ISOLATION CHARACTERISTICS
50% to 75% to 50% Iout max; Figure 9
50% to 75% to 50% Iout max; Figure 10
To within 1% Vout nom
Note 1: For applications requiring reduced output voltage ripple and noise, consult SynQor applications support (e-mail: [email protected])
Note 2: Higher values of isolation capacitance can be added external to the module.
Product # PQ60260HTB10
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-2HTB26F Rev. H
10/10/08
Page 3
Input:
Output:
Current:
Package:
Technical Specification
35-75 V
26 V
9.6 A (250W)
Half-brick
ELECTRICAL CHARACTERISTICS (Continued)
Parameter P
FEATURE CHARACTERISTICS
Switching Frequency
ON/OFF Control (Option P)
Off-State Voltage On-State Voltage
ON/OFF Control (Option N)
Off-State Voltage
On-State Voltage
ON/OFF Control (Either Option)
Pull-Up Voltage
Pull-Up Resistance
Output Voltage Trim Range
Output Voltage Remote Sense Range
Output Over-Voltage Protection
Over-Temperature Shutdown
Over-Temperature Shutdown Restart Hysteresis
Load Current Scale Factor
RELIABILITY CHARACTERISTICS
Calculated MTBF (Telcordia)
Calculated MTBF (MIL-217)
Field Demonstrated MTBF
Min.
Typ.
Max.
Units Notes & Conditions
270
300
340
kHz
-2
2.7
0.8
18
V
V
2.7
-2
-20
Vin/6
42
117
120
10
TBD
18
0.8
15
+10
+10
V
V
V
kW
%
%
%
°C
°C
2.2
1.3
Regulation stage and Isolation stage
Figures A & B
Measured across Pins 9 & 5; Figure C
Measured across Pins 9 & 5
Over full temp range; % of nominal Vout
Average PCB Temperature
See App Note: Output Load Current Calc.
10 Hrs. TR-NWT-000332; 80% load,300LFM, 40oC Ta
106 Hrs. MIL-HDBK-217F; 80% load, 300LFM, 40oC Ta
106 Hrs. See our website for details
6
STANDARDS COMPLIANCE
Parameter P
Notes
File # E194341, Basic insulation & pollution degree 2
Certified by TUV
STANDARDS COMPLIANCE
UL/cUL 60950-1 EN60950-1 72/23/EEC
93/68/EEC
Needle Flame Test (IEC 695-2-2)
IEC 61000-4-2
GR-1089-CORE
Telcordia (Bellcore) GR-513
Test on entire assembly; board & plastic components UL94V-0 compliant
ESD test, 8kV - NP, 15kV air - NP (Normal Performance)
Section 7 - electrical safety, Section 9 - bonding/grounding
• An external input fuse must always be used to meet these safety requirements. Contact SynQor for official safety certificates on new releases or download from the SynQor website.
QUALIFICATION TESTING
Parameter P
QUALIFICATION TESTING
Life Test
Vibration
Mechanical Shock
Temperature Cycling
Power/Thermal Cycling
Design Marginality
Humidity
Solderability
# Units
32
5
5
10
5
5
5
15 pins
Test Conditions
95% rated Vin and load, units at derating point, 1000 hours
10-55Hz sweep, 0.060” total excursion,1 min./sweep, 120 sweeps for 3 axis
100g minimum, 2 drops in x and y axis, 1 drop in z axis
-40°C to 100°C, unit temp. ramp 15°C/min., 500 cycles
Toperating = min to max, Vin = min to max, full load, 100 cycles
Tmin-10°C to Tmax+10°C, 5°C steps, Vin = min to max, 0-105% load
85°C, 85% RH, 1000 hours, 2 minutes on and 6 hours off
MIL-STD-883, method 2003
• Extensive characterization testing of all SynQor products and manufacturing processes is performed to ensure that we supply robust, reliable product. Contact the factory for official product family qualification documents.
Product # PQ60260HTB10
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-2HTB26F Rev. H
10/10/08
Page 4
Input:
Output:
Current:
Package:
100
94
95
93
90
92
Efficiency (%)
Efficiency (%)
Technical Specification
85
80
75
35-75 V
26 V
9.6 A (250W)
Half-brick
91
90
89
70
36 Vin
88
65
48 Vin
75 Vin
87
25 C
40 C
55 C
86
60
0
1
2
3
4
5
6
Load Current (A)
7
8
9
0
10
100
200
300
400
500
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 and
nominal input voltage.
16
25
15
20
Power Dissipation (W)
Power Dissipation (W)
14
13
15
12
10
11
36 Vin
25 C
40 C
55 C
10
48 Vin
5
75 Vin
9
8
0
0
1
2
3
4
5
6
Load Current (A)
7
8
9
0
10
Figure 3: Power dissipation at nominal output voltage vs. load current
for minimum, nominal, and maximum input voltage at 25°C.
100
200
300
Air Flow (LFM)
400
500
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).
10
27
9
24
8
Output Voltage (V)
Iout (A)
7
6
5
4
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
3
2
100 LFM (0.5 m/s)
0 LFM (0 m/s)
1
21
18
15
36 V
48 V
75 V
12
9
0
0
25
40
55
Ambient Air Temperature (oC)
70
Figure 5: Maximum output power derating curves (no heatsink) vs.
ambient air temperature for airflow rates of 0 LFM through 400 LFM
with air flowing from pin 3 to pin 1 (nominal input voltage).
Product # PQ60260HTB10
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0
85
2
4
6
8
Load Current (A)
10
12
14
Figure 6: Output voltage vs. load current showing typical current limit
curves and converter shutdown points.
www.synqor.com
Doc.# 005-2HTB26F Rev. H
10/10/08
Page 5
Input:
Output:
Current:
Package:
Technical Specification
35-75 V
26 V
9.6 A (250W)
Half-brick
Figure 7: Turn-on transient at full load (resistive load) (10 ms/div).
Input voltage pre-applied. Top Trace: Vout (10V/div). Bottom Trace:
ON/OFF input (5V/div).
Figure 8: Turn-on transient at zero load (10 ms/div). Top Trace: Vout
(10V/div). Bottom Trace: ON/OFF input (5V/div).
Figure 9: Output voltage response to step-change in load current (50%-75%50% of Iout(max); dI/dt = 0.1A/µs). Load cap: 15µF, 450 mW ESR tantalum cap
and 1µF ceramic cap. Top trace: Vout (500mV/div), Bottom trace: Iout (5A/div).
Figure 10: Output voltage response to step-change in load current (50%-75%50% of Iout(max): dI/dt = 5A/µs). Load cap: 480µF, 15 mW ESR tantalum cap
and 1µF ceramic cap. Top trace: Vout (500mV/div), Bottom trace: Iout (5A/div).
See Fig. 13
10 µH
source
impedance
See Fig. 12
See Fig. 14
iS
VSOURCE
iC
47 µF,
<1W ESR
electrolytic
capacitor
DC/DC
Converter
VOUT
1 µF
15 µF,
ceramic 450mW 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 # PQ60260HTB10
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Figure 12: Input Terminal Ripple Current, ic, at full rated output current and nominal input voltage with 10µH source impedance and 47µF
electrolytic capacitor (500 mA/div). See Figure 11.
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Doc.# 005-2HTB26F Rev. H
10/10/08
Page 6
Input:
Output:
Current:
Package:
Technical Specification
35-75 V
26 V
9.6 A (250W)
Half-brick
Figure 13: Input reflected ripple current, is, through a 10 µH source
inductor at nominal input voltage and rated load current (10 mA/div).
See Figure 11.
Figure 14: Output voltage ripple at nominal input voltage and rated
load current (20 mV/div). Load capacitance: 1µF ceramic capacitor
and 15µF tantalum capacitor. Bandwidth: 20 MHz. See Figure 11.
Figure 15: Load current (5A/div) as a function of time when the converter attempts to turn on into a 10 mW short circuit. Top trace (2ms/
div) is an expansion of the on-time portion of the bottom trace.
Figure 16: Output voltage response to step-change in input voltage
(1000V/ms). Ch1: Vin (20V/div), Ch2: Vout (1V/div).
Product # PQ60260HTB10
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Doc.# 005-2HTB26F Rev. H
10/10/08
Page 7
Input:
Output:
Current:
Package:
Technical Specification
35-75 V
26 V
9.6 A (250W)
Half-brick
-20
10
-30
Forward Transmission (dB)
Output Impedance (W)
1
0.1
0.01
36 Vin
0.001
-40
-50
-60
-70
-80
35 Vin
48 Vin
75 Vin
48 Vin
75 Vin
-90
0.0001
-100
10
100
1,000
10,000
100,000
10
100
Hz
Figure 17: Magnitude of incremental output impedance (Zout = vout/
iout) for minimum, nominal, and maximum input voltage at full rated
power.
1,000
Hz
10,000
100,000
Figure 18: Magnitude of incremental forward transmission (FT = vout/
vin) for minimum, nominal, and maximum input voltage at full rated
power.
100
20
Input Impedance (Ohmn)
Reverse Transmission (dB)
10
0
-10
-20
-30
10
1
36 Vin
35 Vin
48 Vin
75 Vin
-40
48 Vin
75 Vin
-50
0.1
10
100
1,000
Hz
10,000
100,000
Figure 19: Magnitude of incremental reverse transmission (RT = iin/iout)
for minimum, nominal, and maximum input voltage at full rated power.
Product # PQ60260HTB10
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10
100
1,000
Hz
10,000
100,000
Figure 20: Magnitude of incremental input impedance (Zin = vin/iin)
for minimum, nominal, and maximum input voltage at full rated power.
www.synqor.com
Doc.# 005-2HTB26F Rev. H
10/10/08
Page 8
Input:
Output:
Current:
Package:
Technical Specification
BASIC OPERATION AND FEATURES
In the positive logic version, the ON/OFF input is active high
(meaning that a high turns the converter on). In the negative logic
version, the ON/OFF signal is active low (meaning that a low
turns the converter on). Figure A details five possible circuits for
driving the ON/OFF pin. Figure B is a detailed look of the internal
ON/OFF circuitry.
The PowerQor series converter uses a two-stage power conversion
topology. The first stage is a buck-converter that keeps the output
voltage constant over variations in line, load, and temperature.
The second stage uses a transformer to provide the functions of
input/output isolation and voltage step-down to achieve the low
output voltage required.
REMOTE SENSE(+) (Pins 8 and 6): The SENSE(+) inputs
correct for voltage drops along the conductors that connect the
converter’s output pins to the load.
Both the first stage and the second stage switch at a fixed frequency for predictable EMI performance. Rectification of the transformer’s output is accomplished with synchronous rectifiers. These
devices, which are MOSFETs with a very low on-state resistance,
dissipate far less energy than Schottky diodes. This is the primary
reason that the PowerQor converter has such high efficiency, even
at very low output voltages and very high output currents.
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. A remote connection at the load can adjust for a voltage
drop only as large as that specified in this datasheet, that is
[Vout(+) - Vout(-)] – [Vsense(+) - Vsense(-)] < Dissipation throughout the converter is so low that it does not
require a heatsink for operation. Since a heatsink is not required,
the PowerQor converter does not need a metal baseplate or potting material to help conduct the dissipated energy to the heatsink.
The PowerQor converter can thus be built more simply and reliably
using high yield surface mount techniques on a PCB substrate.
Sense Range % x Vout
Pins 8 and 6 must be connected for proper regulation of the output voltage. If these connections are not made, the converter will
deliver an output voltage that is slightly higher than its specified
value.
The PowerQor series of half-brick, quarter-brick and eighth-brick
converters uses the industry standard footprint and pin-out configuration.
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.
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(-). There are
two versions of the converter that differ by the sense of the logic
used for the ON/OFF input.
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.
ON/OFF
ON/OFF
ON/OFF
Vin(_)
Vin(_)
Vin(_)
Remote Enable Circuit
Negative Logic
(Permanently Enabled)
ON/OFF
Positive Logic
(Permanently Enabled)
5V
5V
274k
ON/OFF
ON/OFF
Vin(_)
Vin(_)
50k
100pF
50k
Vin(_)
Direct Logic Drive
Figure A: Various circuits for driving the ON/OFF pin.
Product # PQ60260HTB10
Vin(+)
TTL
TTL/
CMOS
Open Collector Enable Circuit
35-75 V
26 V
9.6 A (250W)
Half-brick
Phone 1-888-567-9596
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Figure B: Internal ON/OFF pin circuitry
Doc.# 005-2HTB26F Rev. H
10/10/08
Page 9
Input:
Output:
Current:
Package:
Technical Specification
To decrease the output voltage, the user should connect a resistor
between Pin 7 and Pin 6 (SENSE(-) input). For a desired decrease of
the nominal output voltage, the value of the resistor should be
Rtrim-down =
- 2 (kW)
(100%
D )
where
D% =
Vnominal – Vdesired
Vnominal
x 100%
To increase the output voltage, the user should connect a resistor
between Pin 7 and Pin 8 (SENSE(+) input). For a desired increase of
the nominal output voltage, the value of the resistor should be
Rtrim-up =
(
)
Vnominal – 2
x VDES + VNOM
1.225
(kW)
VDES - VNOM
Figure C graphs the relationship between the trim resistor value and
Rtrim-up and Rtrim-down, showing the total range the output voltage
can be trimmed up or down.
100,000
Trim Resistance (kOhms)
10,000
35-75 V
26 V
9.6 A (250W)
Half-brick
PROTECTION FEATURES
Input Under-Voltage Lockout: The converter is designed to
turn off when the input voltage is too low, helping avoid an input
system instability problem, described in more detail in the application note titled “Input System Instability” 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 (listed on the specification page) before the converter will turn on. Once the converter is on, the input voltage must
fall below the typical Turn-Off Voltage Threshold value before the
converter will turn off.
Input Over-Voltage Shutdown: Available on PQ48 models
only. The converter turns off when the input voltage is too high,
allowing the converter to withstand an input voltage as high as
100V without destruction. The shutdown circuitry is a comparator
with DC hysteresis. When the input voltage exceeds the typical
Input Over-Voltage Shutdown value, the converter will turn off.
Once the converter is off, it will turn back on when the input voltage
falls below the minimum Input Over-Voltage Shutdown value.
Output Current Limit: The maximum current limit remains constant as the output voltage drops. However, once the impedance
of the short across the output is small enough to make the output
voltage drop below the specified Output DC Current-Limit Shutdown
Voltage, the converter turns off.
The converter then enters a “hiccup mode” where it repeatedly turns
on and off at a 5 Hz (nominal) frequency with a 5% duty cycle until
the short circuit condition is removed. This prevents excessive heating of the converter or the load board.
1,000
100
10
1
0
2
4
6
8
10
% Increase in Vout
12
14
16
18
20
% Decrease in Vout
Figure C: Trim Graph for 26Vout 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 bypassed to eliminate noise.
Output Over-Voltage Limit: If the voltage across the output
pins exceeds the Output Over-Voltage Protection threshold, the
converter will immediately stop switching. This prevents damage to
the load circuit due to 1) excessive series resistance in output current path from converter output pins to sense point, 2) a release of
a short-circuit condition, or 3) a release of a current limit condition.
Load capacitance determines exactly how high the output voltage
will rise in response to these conditions. After 200 ms the converter
will automatically restart.
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.
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.
Product # PQ60260HTB10
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Doc.# 005-2HTB26F Rev. H
10/10/08
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Input:
Output:
Current:
Package:
Technical Specification
APPLICATION CONSIDERATIONS
• Input Under-Voltage Lockout
• Input Over-Voltage Shutdown (not present in 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.
• Output Over-Voltage Protection
• Over Temperature Shutdown
• Current Limit
• Short Circuit Protection
Application Circuits: Figure D below provides a typical circuit
diagram which details the input filtering and voltage trimming.
• Turned off by the ON/OFF input
Input Filtering and External Capacitance: Figure E below
provides a diagram showing the internal input filter components. This filter dramatically reduces input terminal ripple current, which
otherwise could exceed the rating of an external electrolytic input
capacitor. The recommended external input capacitance is specified
in the Input Characteristics section on the Electrical Specifications
page. More detailed information is available in the application
note titled “EMI Characteristics” on the SynQor website.
Figure F shows three turn-on scenarios, where a Startup Inhibit
Period is initiated at t0, t1, and t2:
Before time t0, when the input voltage is below the UVL threshold,
the unit is disabled by the Input Under-Voltage Lockout feature. When the input voltage rises above the UVL threshold, the Input
Under-Voltage Lockout is released, and a Startup Inhibit Period is
initiated. At the end of this delay, the ON/OFF pin is evaluated,
and since it is active, the unit turns on.
At time t1, the unit is disabled by the ON/OFF pin, and it cannot be
enabled again until the Startup Inhibit Period has elapsed.
Startup Inhibit Period: The Startup Inhibit Period ensures that
the converter will remain off for approximately 200ms when it is
shut down for any reason. When an output short is present, this
generates a 5Hz “hiccup mode,” which prevents the converter from
overheating. In all, there are seven ways that the converter can be
shut down, initiating a Startup Inhibit Period:
When the ON/OFF pin goes high after t2, the Startup Inhibit Period
has elapsed, and the output turns on within the typical Turn-On
Time.
Vin(+)
Vin
External
Input
Filter
35-75 V
26 V
9.6 A (250W)
Half-brick
Electrolytic
Capacitor 47µF
Vout(+)
Vsense(+)
ON/OFF
Trim
Vsense(_)
Vin(_)
Rtrim-up
or
Rtrim-down
Cload
Iload
Vout(_)
Figure D: Typical application circuit (negative logic unit, permanently enabled).
L
Vin(+)
C1
C2
Vin(_)
Figure E: Internal Input Filter Diagram (component values listed on page 3).
Product # PQ60260HTB10
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10/10/08
Page 11
Input:
Output:
Current:
Package:
Technical Specification
Full Feature Application Notes
This section provides some basic application information for the
full-feature version of the PowerQor series converter. The pin-out
configuration for these optional feature pins is shown on page 2,
and the part numbering format is shown on the last page of this
specification sheet.
All units in this product family include back-drive protection to
simplify the use of multiple converters in a parallel or sequencing
application. However, any voltage applied to the output of the
converter should be kept below 120% of the rated output voltage
of the converter.
In addition to back-drive protection, these units include the following features (pins):
Current Share (pin 3): The active current share feature allows
for N+1 and parallel applications. To achieve load sharing, directly connect the I share pins of multiple units. The load current will
share equally among the multiple units (±5% at full rated current). It is important that the Vin(-) pins of the sharing units be directly connected and NOT placed outside of an EMI filter or other impedance
path. The voltage at the I Share pin will range from 0 to 5 volts (at
full rated current), referenced to the primary-side ground, Vin(-).
Start Sync (pin B): The Start Synchronization pin will allow a
more consistent start-up sequence. To operate this feature, connect
together the Start-Sync pins of multiple current-sharing units. This will
permit immediate start-up with loads greater than the current limit of
a single unit. Without this connection, any set of converters attempting to asynchronously start (or re-start) with a load greater than the
current limit of a single unit will “hiccup”. This “hiccup” mode will
35-75 V
26 V
9.6 A (250W)
Half-brick
continue until one converter attempts a start at the same time as the
minimum number of additional units necessary to sustain the load
condition. For example, three 50 amp units starting into a 90 amp
load would require two units to simultaneously attempt a start. The
Start Sync connection synchronizes these starting attempts and provides a more consistent and reliable start-up sequence. For details
about the “hiccup mode” or repeated startup attempts, please see
the “Startup Inhibit Period” note in this Technical Specification.
Clock Sync (pin A): The External Clock Synchronization pin
provides the ability for the user to control the EMI signature and
synchronize sensitive circuitry to quiet periods in the converter
operation. With this option, the converter can be synchronized to
an external clock signal whose frequency is greater than that of
the free-running internal clock. However, substantially raising the
converter’s frequency will reduce its efficiency. Therefore, the recommended frequency range for the external clock synchronization
signal applied to this pin would be the lowest value possible without
dropping below the minimum frequency listed below:
340 KHz for the 26V unit
The following requirements should also be met:
•The external clock signal should be referenced to the
negative input voltage, Vin(-).
•The high level of the signal should be between 3.5V and 5.0V.
•The low level should be between -0.5V and +1.2V.
•Do not apply a clock signal lower than the specified
frequency.
Vin
Under-Voltage
Lockout Turn-On
Threshold
ON/OFF
(pos logic)
ON
Vout
OFF ON
OFF
ON
25ms (typical
turn on time)
200ms
(typical start-up
inhibit period)
t1
t0
200ms
200ms
t
t2
Figure F: Startup Inhibit Period (turn-on time not to scale)
Product # PQ60260HTB10
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Doc.# 005-2HTB26F Rev. H
10/10/08
Page 12
Input:
Output:
Current:
Package:
Technical Specification
35-75 V
26 V
9.6 A (250W)
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.
A “-G” suffix indicates the product is 6/6 RoHS compliant.
P Q 60 2 60 H T B 10 N N S
6/6RoHS
Options(see
OrderingInformation)
OutputCurrent
ThermalDesign
PerformanceLevel
PackageSize
OutputVoltage
InputVoltage
Model Number
Input Voltage
Output Voltage
PQ60012HTB60xyz
PQ60018HTB09xyz
PQ60240HTB10xyz
PQ60260HTB10xyz
PQ60525HTB04xyz
35 - 75 V
35 - 75 V
35 - 75 V
35 - 75 V
35 - 75 V
1.2 V
18 V
24 V
26 V
52.5 V
Maximum
Output Current
60 A
9.2 A
9.6 A
9.6 A
3.8 A
ProductFamily
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.
The following options must be included in place of the x y z
spaces in the model numbers listed above.
Options Description: x y z
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]
Enable Logic
Pin Style
Feature Set
P - Positive
N - Negative
K - 0.110"
N - 0.145"
R - 0.180"
Y - 0.250"
S - Standard
F - Full Feature
Not all combinations make valid part numbers, please contact
SynQorforavailability.
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 # PQ60260HTB10
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.# 005-2HTB26F Rev. H
10/10/08
Page 13
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