11A/99W

Technical
Specification
PQ50090QGB11
48V
9.0V
11A
2000V dc
Quarter-brick
Input
Output
Current
Isolation
DC-DC Converter
The PQ50090QGB11 PowerQor Giga converter is an
isolated, fixed switching frequency DC/DC converter
that uses synchronous rectification and a patented
topology to achieve extremely high efficiency and
power density. This 9Vout module provides 2,000Vdc
isolation and can deliver steady state output current
up to 11A. RoHS compliant (see last page).
Operational Features
• High efficiency, 90% at full rated load current
• Delivers up to 11A of output current (99W)
PQ50090QGB11
• Input voltage range: 44-52V
Protection Features
• Fixed frequency switching provides predictable EMI performance
• No minimum load requirement means no preload resistors required
• Wide output voltage trim range (-10%, +10%), see trim section
• Input under-voltage lockout disables converter at low input voltage
• Output current limit and short circuit protection protects converter &
load from permanent damage and consequent hazardous conditions
• Active back bias limit provides smooth startup with external load
induced pre-bias
Mechanical Features
• Industry standard quarter-brick pin-out configuration
• Industry standard size: 1.45" x 2.49" x0.512" (36.8 x 63.1x 13.0mm)
• Latching output over-voltage protection protects load from
damaging voltages
• Thermal shutdown protects converter from abnormal
environmental conditions
• Total height only 0.536" (13.6mm) for baseplated unit
• Total weight: 2.1oz (58g) for baseplated unit
Control Features
• On/Off control referenced to input side
(positive and negative logic options are available)
• Output voltage trim range of -10%, +10%
Safety Features
Contents
Pending
• 2000V, 30MΩ input-to-output isolation input/output ground separation
• UL 60950-1:2003, basic insulation
• CAN/CSA-C22.2 No. 60950-1:2003
• EN60950-1:2001
• RoHS compliant (see last page)
Product # PQ50090QGB11
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Page No.
MECHANICAL DIAGRAM (base-plated) . . . . . . . . . . . . . . . . . . . . . . . . . 2
PQ50090QGB11 Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . 3
PQ50 Standards and Qualifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
PQ50090QGB11 Datasheet Figures . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Application Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
www.synqor.com
Doc.# 005-0005485 Rev. A
03/29/10
Page 1
Input:48V
Output:9.0V
Current:11A
Part No.:PQ50090QGB11
Technical Specification
MECHANICAL DIAGRAM (base-plated)
PIN DESIGNATIONS
NOTES
1)
2)
3)
4)
5)
6)
7)
M3 screws used to bolt unit’s baseplate to other surfaces (such as a
heatsink) must not exceed 0.100" (2.54 mm) depth below the surface
of the baseplate.
Applied torque per screw should not exceed 6in-lb. (0.7 Nm).
Baseplate flatness tolerance is 0.004" (.10mm) TIR for surface.
Pins 1-3, 5-7 are 0.040” (1.02mm) diameter, with 0.080” (2.03mm)
diameter standoff shoulders.
Pins 4 and 8 are 0.062” (1.57 mm) diameter with 0.100" (2.54 mm)
diameter standoff shoulders.
Other Pin extension lengths available
All Pins: Material - Copper Alloy
- Finish (RoHS 6/6) - Matte Tin over Nickel plate
Undimensioned components are shown for visual reference only.
Weight: 2.1oz (58g) typical
8)
9)
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)
Product # PQ50090QGB11
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Pin
Name
1
Vin(+)
2
ON/OFF
3
Vin(–)
Function
Positive input voltage
TTL input to turn converter on and off,
referenced to Vin(–), with internal pull up.
Negative input voltage
4
Vout(–)
Negative output voltage
5
SENSE(–)
Negative remote sense; see note 1
6
TRIM
Output voltage trim; see note 2
7
SENSE(+)
Positive remote sense; see note 3
8
Vout(+)
Positive output voltage
Notes:
1) Pin 5 must be connected to Vout(-).
2) Leave Pin 6 open for nominal output voltage.
3) Pin 7 must be connected to Vout(+).
www.synqor.com
Doc.# 005-0005485 Rev. A
03/29/10
Page 2
Input:48V
Output:9.0V
Current:11A
Part No.:PQ50090QGB11
Technical Specification
PQ50090QGB11 ELECTRICAL CHARACTERISTICS
Ta = 25 °C, airflow rate = 300 LFM, Vin = 48V dc unless otherwise noted; full operating temperature range is -40 °C to +70 °C baseplate temperature
with appropriate power derating. Specifications subject to change without notice.
Parameter
Min.
ABSOLUTE MAXIMUM RATINGS
Input Voltage
Non-Operating
Operating
Isolation Voltage
Input to Output
Operating Temperature
Storage Temperature
Voltage at ON/OFF input pin
INPUT CHARACTERISTICS
Operating Input Voltage Range
Input Under-Voltage Lockout
Turn-On Voltage Threshold
Turn-Off Voltage Threshold
Lockout Voltage Hysteresis
Maximum Input Current
No-Load Input Current
Disabled Input Current
Response to Input Transient
Input Reflected Ripple Current
Input Terminal Ripple Current
Recommended Input Fuse
Recommended External Input Capacitance
Input Filter Component Values (L\C)
OUTPUT CHARACTERISTICS
Output Voltage Set Point
Output Voltage Regulation
Over Line
Over Load
Over Temperature
Total Output Voltage Range
Output Voltage Ripple and Noise
Peak-to-Peak
RMS
Operating Output Current Range
Output DC Current-Limit Inception
Output DC Current-Limit Shutdown Voltage
Back-Drive Current Limit while Enabled
Back-Drive Current Limit while Disabled
Maximum Output Capacitance Electrolytic
EFFICIENCY
100% Load
50% Load
Product # PQ50090QGB11
Typ.
-40
-55
-2
Max.
Units Notes & Conditions
80
60
V
V
2000
70
125
18
V
°C
°C
V
44
48
52
V
31.5
29.0
1.5
33.0
30.5
2.5
34.5
32.0
3.5
2.7
160
4
V
V
V
A
mA
mA
mV
mA
mA
A
µF
µH\µF
80
2
225
5
145
20
20
47
2.0\6.6
8.91
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0.25V/μs input transient
RMS thru 10μH inductor
RMS
Fast acting external fuse recommended
Typical ESR 0.1-0.2Ω; Figure 13
Internal values
9.09
V
±0.05\4.5
±0.05\4.5
±35
±0.2\18
±0.2\18
±100
9.23
%\mV
%\mV
mV
V
75
20
11
15.3
mV
mV
A
A
V
A
mA
uF
Over sample, line, load, temperature & life
20MHz bandwidth; see Note 2
Full load
Full load
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)
%
%
Figures 1 - 2
Figures 1 - 2
25
5
0.2
0
100% Load, 44V Vin
9.00
8.77
0
11.7
Continuous
Continuous
13.5
6.0
0.7
10
1.25
50
1,700
89.5
90.5
www.synqor.com
See note 1
See note 1
Doc.# 005-0005485 Rev. A
03/29/10
Page 3
Input:48V
Output:9.0V
Current:11A
Part No.:PQ50090QGB11
Technical Specification
PQ50090QGB11 ELECTRICAL CHARACTERISTICS (continued)
Ta = 25 °C, airflow rate = 300 LFM, Vin = 48V dc unless otherwise noted; full operating temperature range is -40 °C to +70 °C baseplate temperature
with appropriate power derating. Specifications subject to change without notice.
Parameter
Min.
Typ.
Max.
Units Notes & Conditions
DYNAMIC CHARACTERISTICS
Input Voltage Ripple Rejection
60
dB
120Hz; Figure 16
Output Voltage during Load Current Transient
Step Change in Output Current (0.1A/µs)
300
mV
50% to 75% to 50% Iout max, 470 μF load cap
Step Change in Output Current (5A/µs)
200
mV
Settling time
300
us
To within 1% Vout nom
Turn-On Transient
Turn-On Time
10
ms
Full load, Vout=90% nom; Figures 9 & 10
Output Voltage Overshoot
0
%
ISOLATION CHARACTERISTICS
Isolation Voltage (dielectric strength)
2000
V
See Absolute Maximum Ratings
Isolation Resistance
30
MΩ
Isolation Capacitance (input to output)
470
pF
See Note 4
TEMPERATURE LIMITS FOR POWER DERATING CURVES
Semiconductor Junction Temperature
125
°C
Package rated to 150°C
Board Temperature
125
°C
UL rated max operating temp 130°C
Transformer Temperature
125
°C
FEATURE CHARACTERISTICS
Switching Frequency Regulation Stage
290
320
350
kHz
ON/OFF Control (Option P)
Off-State Voltage
-2.0
0.8
V
On-State Voltage
2.4
18.0
ON/OFF Control (Option N)
Off-State Voltage
2.4
18
V
On-State Voltage
-2.0
0.8
ON/OFF Control (Either Option)
Application notes; Figures A & B
Pull-Up Voltage
Vin/4.25
14.30
V
Pull-Up Resistance
40
kΩ
Output Voltage Trim Range
-10
10
%
Measured across Pins 8 & 4; Figure C
Output Over-Voltage Protection
117
122
127
%
Over Full Temperature Range; % of nominial Vout
Over-Temperature Shutdown
125
°C
Average PCB Temperature
Over-Temperature Shutdown Restart Hysteresis
10
°C
RELIABILITY CHARACTERISTICS
Calculated MTBF (Telcordia)
2.50
106 Hrs. TR-NWT-000332; 80% load, 300LFM, 40°C Ta
Calculated MTBF (MIL-217)
1.56
106 Hrs. MIL-HDBK-217F; 80% load, 300LFM, 40°C Ta
Field Demonstrated MTBF
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: [email protected])
Note 3: If the output voltage falls below the Output DC Current Limit Shutdown Voltage for more than 50ms, then the unit will enter into hiccup mode,
with a 500ms off-time.
Note 4: Higher values of isolation capacitance can be added external to the module.
Product # PQ50090QGB11
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0005485 Rev. A
03/29/10
Page 4
Input:48V
Output:9.0V
Current:11A
Part No.:PQ50090QGB11
Technical Specification
PQ50 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)
IEC 61000-4-2
Pending
Basic Insulation
Test on entire assembly; board & plastic components UL94V-0 compliant
ESD test, 8 kV - NP, 15 kV air - NP (Normal Performance)
Note: An external input fuse must always be used to meet these safety requirements. Contact SynQor for official safety certificates on new releases or
download from the SynQor website.
Parameter
QUALIFICATION TESTING
Life Test
Vibration
Mechanical Shock
Temperature Cycling
Power/Thermal Cycling
Design Marginality
Humidity
Solderability
Product # PQ50090QGB11
# Units Test Conditions
32
5
5
10
5
5
5
15 pins
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95% rated Vin and load, units at derating point, 1000 hours
10-55 Hz sweep, 0.060” total excursion, 1 min./sweep, 120 sweeps for 3 axis
100g minimum, 2 drops in x 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, continuous Vin applied except 5 min/day
MIL-STD-883, method 2003
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Doc.# 005-0005485 Rev. A
03/29/10
Page 5
Input:48V
Output:9.0V
Current:11A
Part No.:PQ50090QGB11
Technical Specification
100
14
95
12
Power Dissipation (W)
Efficiency (%)
90
85
80
75
70
10
8
6
4
44 Vin
44 Vin
48 Vin
65
48 Vin
2
52 Vin
52 Vin
0
60
0
1
2
3
4
5
6
Load Current (A)
7
8
9
10
0
11
Figure 1: Efficiency at nominal output voltage vs. load current for minimum,
nominal, and maximum input voltage at 25°C.
1
2
3
4
5
6
Load Current (A)
7
8
9
10
11
Figure 2: Power dissipation at nominal output voltage vs. load current for
minimum, nominal, and maximum input voltage at 25°C.
12
10
Iout(A)
8
6
4
400LFM(2.0m/s)
300LFM(1.5m/s)
2
200LFM(1.0m/s)
100LFM(0.5 m/S)
0
25
40
55
70
85
Semiconductor junction temperature is
within 1°C of surface temperature
Ambient Air Temperature(°C)
Figure 3: Maximum output power-derating curve vs. ambient air temperature
for airflow rates of 100LFM through 400LFM with air flowing from pin 3 to pin
1 (nominal input voltage).
Figure 4: Thermal plot of converter at 11A load current (99W) with 70°C
baseplate temperature. Air is flowing across the converter from pin 3 to pin 1
(nominal input voltage).
Figure 5: Turn-on transient at full load (resistive load) (4 ms/div).
Ch 1: Vout (2 V/div)
Ch 2: ON/OFF input (5 V/div)
Figure 6: Turn-on transient at zero load (4ms/div).
Ch 1: Vout (2V/div)
Ch 2: ON/OFF input (5V/div)
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Doc.# 005-0005485 Rev. A
03/29/10
Page 6
Input:48V
Output:9.0V
Current:11A
Part No.:PQ50090QGB11
Technical Specification
Figure 7: Output voltage response to step-change in load current
(50%-75%-50% of Iout(max); dI/dt = 0.1A/μ s; 1 ms/div). Load cap: 1uF
ceramic and 10μF, 100mOhm ESR tantulum capacitors. Top trace: Vout (200mV/
div). Bottom trace: Iout (2A/div)..
Input
Reflected
Ripple
Current
source
impedance
Input
Terminal
Ripple
Current
iS
iC
Figure 8: Output voltage response to step-change in load current
(50%-75%-50% of Iout(max): dI/dt = 0.5A/μ s; 1 ms/div). Load cap: 470μF,
30mOhm electrolitic capacitor. Top trace: Vout (200mV/div). Bottom trace: Iout
(2A/div).
Output
Voltage
Ripple
DC-DC
Converter
VOUT
VSOURCE
electrolytic
capacitor
ceramic
capacitor
tantalum
capacitor
Figure 9: Test set-up diagram showing measurement points for Input Terminal
Ripple Current (Figure 10), Input Reflected Ripple Current (Figure 11) and
Output Voltage Ripple (Figure 12).
Figure 10: Input Terminal Ripple Current, ic, at full rated output current and
nominal input voltage with 10μH source impedance and 47μF electrolytic
capacitor (200 mA/div; 2μs/div). See Figure 9.
Figure 11: Input reflected ripple current, is, through a 10μH source inductor at
nominal input voltage and rated load current
(10mA/div; 2 μs/div). See Figure 9.
Figure 12: Output voltage ripple at nominal input voltage and rated load current
(50mV/div; 1μs/div). Load capacitance: 1μF ceramic capacitor and 10μF
tantalum capacitor. Bandwidth: 20MHz. See Fig 9.
Product # PQ50090QGB11
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Doc.# 005-0005485 Rev. A
03/29/10
Page 7
Input:48V
Output:9.0V
Current:11A
Part No.:PQ50090QGB11
Technical Specification
10
Output Voltage (V)
9
8
7
6
44Vin
48Vin
5
52Vin
4
0
2
4
6
8
10
12
14
16
Load Current (A)
Figure 13: Load current (5A/div; 100μs/div) as a function of time when the
converter attempts to turn on into a 1mOhm short circuit.
1
Figure 14: Output voltage versus load current showing typical current limit
curves.
0
48 Vin
48 Vin
0.1
0.01
0.001
48 Vin
-20
Forward Transmission (dB)
Output Impedance (ohms)
-10
-30
-40
-50
-60
-70
-80
48 Vin
-90
0.0001
-100
10
100
1,000
Hz
10,000
100
1,000
10,000
Hz
100,000
Figure 16: Magnitude of incremental forward transmission
(FT = Vout/Vin) for nominal input voltage at full rated power.
Figure 15: Magnitude of incremental output impedance
(Zout = Vout/Iout) for nominal input voltage at full rated power.
5
10
100,000
100
48 Vin
48 Vin
Input Impedance (ohms)
Reverse Transmission (dB)
-5
-15
-25
-35
-45
10
1
48 Vin
48 Vin
0.1
-55
10
100
1,000
10,000
10
100,000
Hz
Figure 17: Magnitude of incremental reverse transmission
(RT = Iin/Iout) for nominal input voltage at full load
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100
1,000
10,000
100,000
Hz
Figure 18: Magnitude of incremental input impedance
(Zint = Vin/Iin) for nominal input voltage at full load
www.synqor.com
Doc.# 005-0005485 Rev. A
03/29/10
Page 8
Input:48V
Output:9.0V
Current:11A
Part No.:PQ50090QGB11
Technical Specification
BASIC OPERATION AND FEATURES
CONTROL FEATURES
The PowerQor series converter uses a two-stage power conversion topology. The first stage is a buck-converter that keeps the
output voltage constant over variations in line, load, and temperature. The second stage uses a transformer to provide the functions
of input/output isolation and voltage step-down to achieve the
low output voltage required.
REMOTE ON/OFF (Pin 2): The ON/OFF input, Pin 2, permits
the user to control when the converter is on or off. This input is
referenced to the return terminal of the input bus, Vin(-). There are
two versions of the converter that differ by the sense of the logic
used for the ON/OFF input.
Both the first stage and the second stage switch at a fixed frequency for predictable EMI performance. Rectification of the
transformer’s output is accomplished with synchronous rectifiers.
These devices, which are MOSFETs with a very low on-state
resistance, dissipate far less energy than Schottky diodes. This
is the primary reason that the PowerQor converter has such high
efficiency, even at very low output voltages and very high output
currents.
Dissipation throughout the converter is so low that it does not
require a heatsink for operation. Since a heatsink is not required,
the PowerQor converter does not need a metal baseplate or
potting material to help conduct the dissipated energy to the
heatsink. The PowerQor converter can thus be built more simply
and reliably using high yield surface mount techniques on a PCB
substrate.
The PowerQor series of half-brick and quarter-brick converters
uses the industry standard footprint and pin-out configuration.
ON/OFF
ON/OFF
ON/OFF
Vin(_)
Vin(_)
Vin(_)
Remote Enable Circuit
Negative Logic
(Permanently
Enabled)
5V
ON/OFF
Positive Logic
(Permanently
Enabled)
In the positive logic version, the ON/OFF input is active high
(meaning that a high turns the converter on). In the negative logic
version, the ON/OFF signal is active low (meaning that a low turns
the converter on). Figure A details five possible circuits for driving
the ON/OFF pin. Figure B is a detailed look of the internal ON/
OFF circuitry.
REMOTE SENSE(+) (Pins 7 and 5): The SENSE(+) inputs correct for voltage drops along the conductors that connect the converter’s output pins to the load.
Pin 7 should be connected to Vout(+) and Pin 5 should be connected to Vout(-) at the point on the board where regulation is desired.
A remote connection at the load can adjust for a voltage drop only
as large as that specified in this datasheet, that is
[Vout(+) - Vout(-)] – [Vsense(+) - Vsense(-)] <
Sense Range % x Vout
Pins 7 and 5 must be connected for proper regulation of the output
voltage. If these connections are not made, the converter will deliver
an output voltage that is slightly higher than its specified value.
Note: the output over-voltage protection circuit senses the voltage
across the output (pins 8 and 4) to determine when it should trigger,
not the voltage across the converter’s sense leads (pins 7 and 5).
Therefore, the resistive drop on the board should be small enough so
that output OVP does not trigger, even during load transients.
162k
ON/OFF
TTL/
CMOS
5V
Vin(+)
50k
TTL
ON/OFF
100k
Vin(_)
Open Collector Enable Circuit
Vin(_)
Direct Logic Drive
Figure A: Various circuits for driving the ON/OFF pin.
Product # PQ50090QGB11
Vin(_)
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Figure B: Internal ON/OFF pin circuitry
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Doc.# 005-0005485 Rev. A
03/29/10
Page 9
Input:48V
Output:9.0V
Current:11A
Part No.:PQ50090QGB11
Technical Specification
OUTPUT VOLTAGE TRIM (Pin 6): The TRIM input permits the
user to adjust the output voltage across the sense leads up or
down according to the trim range specifications.
To decrease the output voltage, the user should connect a resistor
between Pin 6 and Pin 5 (SENSE(-) input). For a desired decrease
of the nominal output voltage, the value of the resistor should be
( )
511
- 10.22 (kW)
Rtrim-down =
D%
where
D% =
Vnominal – Vdesired
Vnominal
x 100%
To increase the output voltage, the user should connect a resistor
between Pin 6 and Pin 7 (SENSE(+) input). For a desired increase
of the nominal output voltage, the value of the resistor should be
Rtrim-up =
where
(
5.11VOUT(100+D%) _ 511 _
10.22
1.225D%
D%
)
(kW)
VOUT = Nominal Output Voltage
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.
Total DC Variation of Vout: For the converter to meet its full
specifications, the maximum variation of the DC value of Vout,
due to both trimming and remote load voltage drops, should not
be greater than that specified for the output voltage trim range.
PROTECTION FEATURES
Input Under-Voltage Lockout: The converter is designed to
turn off when the input voltage is too low, helping avoid an input
system instability problem, described in more detail in the application note titled “Input System Instability”. The lockout circuitry
is a comparator with DC hysteresis. When the input voltage is
rising, it must exceed the typical Turn-On Voltage Threshold value
(listed on the specification page) before the converter will turn
on. Once the converter is on, the input voltage must fall below
the typical Turn-Off Voltage Threshold value before the converter
will turn off.
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.
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.
Figure C: Trim Graph
Note: the TRIM feature does not affect the voltage at which the
output over-voltage protection circuit is triggered. Trimming the
output voltage too high may cause the over-voltage protection
circuit to engage, particularly during transients.
It is not necessary for the user to add capacitance at the Trim pin.
The node is internally bypassed to eliminate noise.
Product # PQ50090QGB11
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Doc.# 005-0005485 Rev. A
03/29/10
Page 10
Input:48V
Output:9.0V
Current:11A
Part No.:PQ50090QGB11
Technical Specification
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.
Input Filtering and External Capacitance: Figure E below
provides a diagram showing the internal input filter components.
This filter dramatically reduces input terminal ripple current, which
otherwise could exceed the rating of an external electrolytic
input capacitor. The recommended external input capacitance
is specified in the “Input Characteristics” section. More detailed
information is available in the application note titled “EMI
Characteristics” on the SynQor website.
Application Circuits: Figure D below provides a typical circuit
diagram which details the input filtering and voltage trimming.
Vin(+)
Vin
External
Input
Filter
Vsense(+)
Electrolytic
Capacitor
47µF
Vout(+)
ON/OFF
Trim
Vsense(_)
Vin(_)
Rtrim-up
or
Rtrim-down
Cload
Iload
Vout(_)
Figure D: Typical application circuit (negative logic unit, permanently enabled).
L
Vin(+)
C
Vin(_)
Figure E: Internal Input Filter Diagram (component values listed on page 3).
Product # PQ50090QGB11
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0005485 Rev. A
03/29/10
Page 11
Input:48V
Output:9.0V
Current:11A
Part No.:PQ50090QGB11
Technical Specification
Startup Inhibit Period: The Startup Inhibit Period ensures that
the converter will remain off for approximately 200ms when it is
shut down for any reason. When an output short is present, this
generates a 5Hz “hiccup mode,” which prevents the converter
from overheating. In all, there are seven ways that the converter
can be shut down, initiating a Startup Inhibit Period:
• Input Under-Voltage Lockout
• Input Over-Voltage Shutdown (not present in Quarter-brick)
• Output Over-Voltage Protection
Figure F shows three turn-on scenarios, where a Startup Inhibit
Period is initiated at t0, t1, and t2:
Before time t0, when the input voltage is below the UVL threshold,
the unit is disabled by the Input Under-Voltage Lockout feature.
When the input voltage rises above the UVL threshold, the Input
Under-Voltage Lockout is released, and a Startup Inhibit Period is
initiated. At the end of this delay, the ON/OFF pin is evaluated,
and since it is active, the unit turns on.
At time t1, the unit is disabled by the ON/OFF pin, and it cannot
be enabled again until the Startup Inhibit Period has elapsed.
• Over Temperature Shutdown
• Current Limit
When the ON/OFF pin goes high after t2, the Startup Inhibit
Period has elapsed, and the output turns on within the typical
Turn-On Time.
• Short Circuit Protection
• Turned off by the ON/OFF input
Vin
Under-Voltage
Lockout TurnOn Threshold
ON/OFF
(neg logic)
ON
OFF ON
Vout
OFF
ON
8ms (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 # PQ50090QGB11
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0005485 Rev. A
03/29/10
Page 12
Input:48V
Output:9.0V
Current:11A
Part No.:PQ50090QGB11
Technical Specification
PART NUMBERING SYSTEM
ORDERING INFORMATION
The part numbering system for SynQor’s dc-dc converters
follows the format shown in the example below.
PQ 5 0 0 9 0Q GB 1 1 N N S -G
6/6 RoHS
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.
Options
(see
Ordering Information)
Output Current
Thermal Design
Performance Level
Model Number
Input
Voltage
Output
Voltage
Max Output
Current
PQ50090QGB11NNS
44-52V
9.0V
11A
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
Thermal Design
Product Family
Options Description: x y z
Enable Logic Pin Style
B - Baseplated
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]
N - Negative
Feature Set
N - 0.145”
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 U.S. patents, one or more of which apply to
this product. Additional patent applications may be pending or filed in
the future.
5,999,417
6,222,742
6,545,890
6,577,109
6,594,159
6,731,520
6,894,468
6,896,526
6,927,987
7,050,309
7,072,190
7,085,146
7,119,524
7,269,034
7,272,021
7,272,023
7,558,083
7,564,702
Contact SynQor for further information:
Phone:
Toll Free:
Fax:
E-mail:
Web:
Address:
Product # PQ50090QGB11
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.# 005-0005485 Rev. A
03/29/10
Page 13
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