10A

Technical
Specification
NQ16W50SKA10
6.0-16.0V 0.75-5.0V
Input
10 Amp
Outputs
Non
Current
Isolated
SMT
Surface Mount
The NiQor SMT DC/DC converter is a non-isolated
buck regulator, which employs synchronous
rectification to achieve extremely high conversion
efficiency. The NiQor family of converters are used
predominately in DPA systems using a front end DC/
DC high power brick (48Vin to low voltage bus).
The non-isolated NiQor converters are then used at
the point of load to create the low voltage outputs
required by the design. The wide trim module can
be programmed to a variety of output voltages
through the use of a single external resistor. RoHS
compliant (see page 12).
Non-Isolated
NiQor surface mount module
Operational Features
•Ultra high efficiency, up to 94% at full rated load
•Delivers up to 10 Amps of output current with minimal derating
- no heatsink required
•Input Voltage Range : 6.0 - 16.0V
•Fast transient response time
•On-board input and output filter capacitor
•No minimum load requirement means no preload resistors required
Mechanical Features
•DOSA standard pin-out configuration
•Industry standard size: 1.3” x 0.53” x 0.29”
(33 x 13.5 x 7.3 mm)
•Total weight: 0.18 oz. (5 grams), lower mass greatly reduces
vibration and shock problems
•Open frame construction maximizes air flow cooling
•Also available in SIP packaging
Control Features
•On/Off control
•Output voltage trim (industry standard) permits custom voltages
and voltage margining
•Remote Sense (standard option)
Product # NQ16W50SKA10
Phone 1-888-567-9596
Protection Features
•Input under-voltage lockout disables converter at low input
voltage conditions
•Temperature compensated over-current shutdown protects converter
from excessive load current or short circuits
•Output over-voltage protection protects load from damaging voltages
•Thermal shutdown protects converter from abnormal
environmental conditions
Safety Features
•UL 60950-1:2003
•CAN/CSA-C22.2 No. 60950-1:2003
•EN60950-1:2001
•RoHS compliant (see page 12)
www.synqor.com
Doc.# 005-NS15W10 Rev. C
03/23/10
Page 1
Input:
Outputs:
Current:
Package:
Technical Specification
6.0 - 16.0V
0.75 - 5.0V
10A
SMT
Mechanical Diagram
Surface Mount Package
Side View
Bottom View
0.288+.018
1.30
(7.32+0.45)
(33.0)
see Note 4
0.025
(0.64)
2
3
4
5
0.075
0.063
(1.91)
(1.60)
0.405
(10.29)
Typ.
0.53
(13.5)
7
6
0.012+.007
(0.3+0.17)
Bottomside
Clearance
0.297
(7.54)
(1.6)
(1.22)
(12.37)
(2.54)
0.063
0.048
0.487
0.100
0.677
Typ.
(17.20)
0.867
(22.02)
1.057
(26.85)
1.177
(29.90)
Recommended SMT Pad Size:
Minimum: 0.074” x 0.122” (1.88mm x 3.1mm)
Maximum: 0.095” x 0.140” (2.41mm x 3.56mm)
NOTES
SMT CONTACT DESIGNATIONS
1) SMT Contacts: Material - Brass
Finish - Gold over Nickel plate
2) Undimensioned components are shown for visual
reference only.
3) All dimensions in inches (mm)
Tolerances: x.xx +/-0.02 in. (x.x +/-0.5mm)
x.xxx +/-0.010 in. (x.xx +/-0.25mm)
4) Coplanarity for pins 2-7 is 0.004” max
5) Weight: 0.18 oz. (5 g) typical
6) Workmanship: Meets or exceeds IPC-A-610C Class II
Product # NQ16W50SKA10
Phone 1-888-567-9596
Pin No.
Name
Function
2
GND
Ground
3
Vout(+)
Positive output voltage
4
TRIM
Output Voltage Trim
5
SENSE(+)
Positive remote sense
6
Vin(+)
Positive input voltage
7
ON/OFF
Input to turn converter on/off
Pins in Italics Shaded text are Optional
www.synqor.com
Doc.# 005-NS15W10 Rev. C
03/23/10
Page 2
Input:
Outputs:
Current:
Package:
Technical Specification
6.0 - 16.0V
0.75 - 5.0V
10A
SMT
ELECTRICAL CHARACTERISTICS - NQ16W50SKA10
TA=25°C, airflow rate=300 LFM, Vin=12Vdc unless otherwise noted; full operating temperature range is -40°C to +105°C ambient
temperature with appropriate power derating. Specifications subject to change without notice.
Parameter
ABSOLUTE MAXIMUM RATINGS
Input Voltage
Non-Operating
Operating
Operating Temperature
Storage Temperature
Voltage at ON/OFF input pin
RECOMMENDED OPERATING CONDITIONS
Input Voltage Range
Input Fuse Rating
External Input Capacitance
Output Voltage
Output Current
INPUT CHARACTERISTICS
Input Under-Voltage Lockout
Turn-On Voltage Threshold
Turn-Off Voltage Threshold
Lockout Hysteresis
Maximum Input Current
“
“
No-Load Input Current
“
“
Disabled Input Current
Inrush Current Transient Rating
Input Filter Capacitor Value
Input Reflected-Ripple Current
“
“
OUTPUT CHARACTERISTICS
Output Voltage Set Point
Output Voltage Range
Operating Output Current Range
Output Voltage Regulation
Over Line
Over Load
Over Temperature
Total Output Voltage Range
Output Voltage Ripple and Noise (pk-pk\RMS)
“
“
Output DC Over Current Shutdown
External Output Capacitance
DYNAMIC CHARACTERISTICS
Input Voltage Ripple Rejection
Output Voltage during Current Transient
For a Step Change in Output Current (0.1A/µs)
For a Step Change in Output Current (3A/µs)
Settling Time
Turn on Transient
Inhibit Time
Rise Time
Output Voltage Overshoot
EFFICIENCY
100% Load
“
“
50% Load
“
“
Product # NQ16W50SKA10
Vout
Min.
Typ.
All
0
All
All
-40
All
-55
All
-3
Max.
Units Notes & Conditions
18
16
105
125
15
All
6
16
All
20
All
100
All
0.75
5.5
All
0
16
VContinuous
VContinuous
°C
°C
V
V
A
Fast blow external fuse recommended
µFESR<1.5W
V
A
All
5.35
5.73
6.10
V
All
4.50
4.73
4.95
V
All1
V
0.75V
1.6
A
6Vin, 100% load
2.5V
4.5
A “
5.0V
8.6
A “
0.75V
31
mA
12Vin
2.5V
71
mA
“
5.0V
132
mA
“
All
3
mA
All
0.1
A2s
With min. output capacitance
All
30
µF
0.75V
36
mA
12Vin, 100% load, pk-pk value
2.5V68
mA “
5.0V98
mA “
0.75V
All
All
0.745
0.75
0.75
0
0.755
5.0
10
All
0.5
All
0.5
All
1
All
3
1.0V
27\5.0
2.5V43\11.6
5.0V67\20.4
All
12
19
24
All
100
5000
All
50
V
V
A
12Vin 50% load
Set output by Rtrim-up
%
With sense pin
%
“
%
“
%
With sense pin, over sample, line, load, temp. & life
mV
Full load; 20MHz bandwidth
mV
“
mV
“
A
µF>0.5mW
dB
All
180
mV
All
180
mV
All100µs
120Hz
50%-75%-50% Iout max; 100uF
50%-75%-50% Iout max; 470uF
To within 1.5% Vout nom.
All
2
4
ms
Resistive load
All
26
ms
“
All
0
V
“
0.75V
78.0
%
2.5V91.0%
5.0V94.5%
0.75V
81.0
%
2.5V91.0%
5.0V92.5%
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-NS15W10 Rev. C
03/23/10
Page 3
Input:
Outputs:
Current:
Package:
Technical Specification
6.0 - 16.0V
0.75 - 5.0V
10A
SMT
ELECTRICAL CHARACTERISTICS (continued) - NQ16W50SKA10
Parameter
Vout
Min.
Typ.
Max.
Units Notes & Conditions
TEMP LIMITS FOR POWER DERATING
Semiconductor Junction Temperature
All
125
°C
Board Temperature
All
125
°C
FEATURE CHARACTERISTICS
Switching Frequency
All
275
300
325
kHz
ON/OFF Control
Open Logic (O) ON/OFF Control
Off-State Voltage
All
1.56.5V
On-State Voltage
All-3.0 0.6
V
Input Resistance
All 20 kW
Positive Logic (P) ON/OFF Control
Logic Low Voltage Range
All-0.2 1.0V
Logic High Voltage Range (internal pullup) All2.2 Vin
V
Pull-up Voltage
All 5 V
Pull-up Resistance
All100
kW
Output Voltage Trim Range
All
0.75
5.5
V
Output Over-Voltage Protection
All
5.6
6.0
6.4
V
Over-Temperature Shutdown
All128
°C
Over-Temperature Shutdown Restart HysteresisAll 10°C
RELIABILITY CHARACTERISTICS
Calculated MTBF (Telcordia)
All15.6
106 Hrs.
Calculated MTBF (MIL-217)
All10
106 Hrs.
Field Demonstrated MTBF
All
106 Hrs.
Package rated to 150°C
UL rated max operating temp 130°C
Half on small duty cycle (e.g. 16Vin; 0.75Vout)
See Figure A
Open collector/drain input; see Figure A
Measured Vout+ to common pins
Over full temp range
Average PCB Temperature
TR-NWT-000332; 100% load, 200LFM, 40oC Ta
MIL-HDBK-217F; 100% load, 200LFM, 40oC Ta
See our website for details
STANDARDS COMPLIANCE
Parameter
Notes & Conditions
STANDARDS COMPLIANCE
UL 60950-1:2007
EN60950-1/A11:2009/A1:2010
CAN/CSA-C22.2 No. 60950-1:2007
IEC 61000-4-2
Basic insulation
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.
QUALIFICATION TESTING
Parameter
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
OPTIONS
Test Conditions
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, y and 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
SynQor provides various options for Packaging, Enable Logic,
and Feature Set for this family of DC/DC converters. Please
consult the last page for information on available options.
Product # NQ16W50SKA10
Phone 1-888-567-9596
PATENTS
SynQor is protected under various patents. Please consult
the last page for further details.
www.synqor.com
Doc.# 005-NS15W10 Rev. C
03/23/10
Page 4
Input:
Outputs:
Current:
Package:
Technical Specification
Figure 1: Efficiency at nominal output voltage vs. load current for
nominal input voltage at 25°C.
6.0 - 16.0V
0.75 - 5.0V
10A
SMT
Figure 2: Power dissipation at nominal output voltage vs. load current
for nominal input voltage at 25°C.
Semiconductor junction temperature is
within 1°C of surface temperature
Figure 3: Maximum output power derating curves for 0.75Vo, 1.2Vo,
1.5Vo units under various thermal conditions and nominal input voltage. See Thermal Considerations section for more details.
Figure 4: Thermal plot of 0.75Vo, 1.2Vo converters at nominal Vin and
10 amp load current mounted on a 85°C, 6-Layer, 2 oz. copper board
(typical installation).
Semiconductor junction temperature is
within 1°C of surface temperature
Figure 5: Maximum output power derating curves for 1.8Vo, 2.5Vo
units under various thermal conditions and nominal input voltage. See
Thermal Considerations section for more details.
Product # NQ16W50SKA10
Phone 1-888-567-9596
Figure 6: Thermal plot of 1.8Vo, 2.5Vo converters at nominal Vin and
10 amp load current mounted on a 70°C, 6-Layer, 2 oz. copper board
(typical installation).
www.synqor.com
Doc.# 005-NS15W10 Rev. C
03/23/10
Page 5
Input:
Outputs:
Current:
Package:
Technical Specification
6.0 - 16.0V
0.75 - 5.0V
10A
SMT
Semiconductor junction temperature is
within 1°C of surface temperature
Figure 7: Maximum output power derating curves for 3.3Vo, 5.0Vo
units under various thermal conditions and nominal input voltage. See
Thermal Considerations section for more details.
Figure 8: Thermal plot of 3.3Vo, 5.0Vo converters at nominal Vin and
10 amp load current mounted on a 70°C, 6-Layer, 2 oz. copper board
(typical installation).
5.0Vout
5.0Vout
3.3Vout
3.3Vout
1.8Vout
1.8Vout
0.75Vout
0.75Vout
on/off
on/off
Figure 9: Turn-on transient at full load (resistive load) (2 ms/div).
Ch 1: ON/OFF input (5V/div)
Ch 2-4: Vout (1V/div)
Figure 10: Turn-on transient at zero load (2 ms/div).
Ch 1: ON/OFF input (5V/div)
Ch 2-4: Vout (1V/div)
5.0Vout
5.0Vout
2.5Vout
2.5Vout
1.5Vout
1.5Vout
Iout
Iout
Figure 11: Output voltage response for 1.5V, 2.5V, 5V units to step-change
in load current (50-75-50% of Iout max; di/dt=0.1A/µs). Load cap: 100µF,
100mW ESR tant, 10µF cer. Ch 1: Iout (10A/div), Ch 2-4: Vout (100mV/div).
Product # NQ16W50SKA10
Phone 1-888-567-9596
Figure 12: Output voltage response for 1.5V, 2.5V, 5V units to step-change in
load current (50-75-50% of Iout max; di/dt=3A/µs). Load cap: 470µF, 100mW
ESR tant, 10µF cer. Ch 1: Iout (10A/div), Ch 2-4: Vout (100mV/div).
www.synqor.com
Doc.# 005-NS15W10 Rev. C
03/23/10
Page 6
Input:
Outputs:
Current:
Package:
Technical Specification
6.0 - 16.0V
0.75 - 5.0V
10A
SMT
See Fig. 14
1 µH
0.9Vout
See Fig. 15
source
impedance
See Fig. 16
iS
VIN
1.8Vout
DC/DC
Converter
VOUT
3.3Vout
VSOURCE
C*
22 µF
100 µF
ceramic 100mW ESR
capacitor
tantalum
capacitor
5.0Vout
* See values for recommended external input capacitance. Inductor optional as needed.
Figure 13: Test set-up diagram showing measurement points for Input
Reflected Ripple Current (Figure 14), Input Terminal Ripple Voltage
(Figure 15), and Output Voltage Ripple (Figure 16).
Figure 14: Input Reflected Ripple Current, is, through a 1 µH source
inductor at nominal input voltage and rated load current (100 mA/div).
See Figure 13.
0.9Vout
0.9Vout
1.8Vout
1.8Vout
3.3Vout
3.3Vout
5.0Vout
5.0Vout
Figure 15: Input Terminal Ripple Voltage at nominal input voltage and
rated load current (200 mV/div). Load capacitance: 22µF ceramic cap
and 100µF tantalum cap. Bandwidth: 20 MHz. See Figure 13.
Figure 16: Output Voltage Ripple at nominal input voltage and rated
load current (50 mV/div). Load capacitance: 22µF ceramic cap and
100µF tantalum cap.. Bandwidth: 20 MHz. See Figure 13.
Figure 17: Magnitude of incremental output impedance (Zout = vout/
iout) for nominal input voltage at full rated power with 100µF tantalum
output capacitor.
Figure 18: Magnitude of incremental forward transmission (FT = vout/
vin) for nominal input voltage at full rated power with 100µF tantalum
output capacitor.
Product # NQ16W50SKA10
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Doc.# 005-NS15W10 Rev. C
03/23/10
Page 7
Input:
Outputs:
Current:
Package:
Technical Specification
Figure 19: Magnitude of incremental reverse transmission (RT = iin/
iout) for nominal input voltage at full rated power with 100µF tantalum
output capacitor.
Product # NQ16W50SKA10
Phone 1-888-567-9596
6.0 - 16.0V
0.75 - 5.0V
10A
SMT
Figure 20: Magnitude of incremental input impedance (Zin = vin/iin)
for nominal input voltage at full rated power with 100µF tantalum output capacitor.
www.synqor.com
Doc.# 005-NS15W10 Rev. C
03/23/10
Page 8
Input:
Outputs:
Current:
Package:
Technical Specification
BASIC OPERATION AND FEATURES
The NiQor series non-isolated converter uses a buck-converter
that keeps the output voltage constant over variations in
line, load, and temperature. The NiQor modules employ
synchronous rectification for very high efficiency.
For a desired increase of the nominal output voltage, the value
of the resistor should be:
Rtrim=
up
VDES - 0.7525
VOUT = 0.7525 +
The NiQor series of SIPs and SMT converters uses the established
industry standard footprint and pin-out configurations.
REMOTE ON/OFF: The ON/OFF input permits the user to
control when the converter is on or off. There are currently
two options available for the ON/OFF input described in the
table below. Others may become available if demand exists.
10500
_ 1000
(W)
or
Dissipation throughout the converter is so low that it does not
require a heatsink or metal baseplate for operation. The NiQor
converter can thus be built more simply and reliably using high
yield surface mount techniques on a single PCB substrate.
CONTROL FEATURES
6.0 - 16.0V
0.75 - 5.0V
10A
SMT
10500
Rtrim-up + 1000
(W)
where V
DES = Desired Output Voltage
To maintain the accuracy of the output voltage over load
current, it is vital that any trim-up resistor be terminated
directly to the converter’s ground foot, not at the connection
to the load. A separate Kelvin connection to the PCB pad for
the ground foot is optimal. Trim-down resistors should be
terminated at the converter’s Sense+ pin.
We do not recommend bypassing the trim pin directly to
ground with a capacitor. The voltage gain from the trim pin to
output is rather large, 15:1. Ground bounce through a bypass
capacitor could introduce significant noise to the converter’s
control circuit.
OUTPUT VOLTAGE TRIM: The TRIM input permits the user
to adjust the output voltage according to the trim range
specifications by using an external resistor. If the TRIM feature
is not being used, leave the TRIM pin disconnected.
TRIM-UP: To increase the output voltage from the nominal
setpoint of 0.7525V using an external resistor, connect the
resistor Rtrim-up between the TRIM and the Ground pin according
to the diagram below.
Vout
Sense+
Vin
On/Off
Gnd
Trim
Rtrim-up
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 Limiting: To provide protection in an output
over load fault condition, the unit is equipped with internal
over-current protection. When the over-current protection
is triggered, the unit enters hiccup mode. The units operate
normally once the fault condition is removed.
Internal Over-Voltage Protection: To fully protect from
excessive output voltage, the NQ16 series contains an Output
Over-Voltage Shutdown circuitry.
This OVP is independent of the trimmed setpoint. As such,
the converter’s load is protected from faults in the external
trim circuitry (such as a trim pin shorted to ground). Since the
setpoint of this OVP does not track trim, it is set at 6.0V, in the
wide-trim W50 model.
The shutdown point is fixed on standard option. SKA also
offers adjustable OVP set point. For more detailed information
contact SynQor technical support.
Product # NQ16W50SKA10
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-NS15W10 Rev. C
03/23/10
Page 9
Input:
Outputs:
Current:
Package:
Technical Specification
6.0 - 16.0V
0.75 - 5.0V
10A
SMT
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.
APPLICATION CONSIDERATIONS
Input Filtering/Capacitance/Damping: The filter circuit of
Figure E is often added to the converter’s input to prevent
switching noise from reaching the input voltage bus.
In the SKA10 (surface mount) converters Cin = 30µF of high
quality ceramic capacitors. With Lin of 1µH, Cd should be
100-200µF and Rd should be 0.1-0.2W, in most applications.
For more information on designing the input filter and
choosing proper values, contact SynQor technical support.
Figure F: Converter with Additional Output Capacitance
Thermal Performance (SKA10): While impossible to be exact,
a simplified thermal model for the mounted converter is
detailed below.
Figure E: NQ16 converter with Input Filter
Adding significant external pure ceramic capacitance directly
across the converter’s input pins is not recommended.
Parasitic inductance associated with the input pin geometry
and PCB traces can create a high-Q CLC circuit with any
external capacitors. Just a few nano-Henries of parasitic
inductance can create a resonance (or an overtone) near
the converter’s switching frequency. Cin has a reactance of
10-20mW at the 300kHz switching frequency. To avoid this
high-frequency resonance, any external input filter should
exhibit a net source impedance of at least 20mW resistive
through this frequency range. This requirement is easily met
with the damping elements discussed above. Adding a small
amount (a few µF) of high-frequency external ceramic will
not violate it.
If using converters at higher powers, consider the ripple
current rating of Cd. Contact SynQor technical support for
details.
Output Capacitance: It is recommended to add at least 100µF
of capacitance, with an ESR in the 0.1W range, to the output
of the SKA10 series of converters. The VMA16 series has this
capacitance included internally. In many applications, however, additional external output capacitance is required to
reduce the response to load transients to an allowable level.
Product # NQ16W50SKA10
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Figure G: Thermal Model for NQ16 Surface Mount
• Rt_J-Pcb models the conduction of heat from the converter’s
hottest junction to the converter’s PCB at large. It is about
3oC/W for converters running at higher output voltage, and
about 4oC/W for lower voltage converters.
• Rt_Pcb-Amb models the power dissipation from converter
PCB to the air stream. It ranges from about 15oC/W at
400LFM to about 25oC/W 100LFM.
• Rt_Pcb-Feet expresses the thermal path from the converter’s
PCB though its mounting feet; it is about 3oC/W.
• Rt_spread models the heat spreading on the PCB to which
the converter is mounted and is largely dependent upon the
construction and layout of that PCB.
• T_mount is the temperature of that PCB in the greater
vicinity of the converter.
As is evident, the values for Rt_spread and T_mount will have
great effect upon the thermal operation of the converter.
With Rt_Pcb-Amb being 5 to 8 times as large as Rt_Pcb-Feet,
in most applications these converters will be predominantly
cooled via thermal conduction through their feet. Airflow
and T_Amb will have only a minimal cooling effect. www.synqor.com
Doc.# 005-NS15W10 Rev. C
03/23/10
Page 10
Input:
Outputs:
Current:
Package:
Technical Specification
• Rt_spread should be minimized. Attach the converter to
large copper planes, on multiple layers, with multiple vias
near the mounting feet.
• T_mount should also be minimized. Place the converter far
enough away from other sources of heat on the PCB so that
it is as cool as practical.
• If operation near derating limits is even suspected, thermal
performance should be verified with the unit mounted in its
intended manner and powered in circuit with all neighboring
circuitry active. Attach a thermocouple to the converter’s
hotspot as shown in Figures 4, 6, and 8 in the Performance
Curves section.
SURFACE MOUNT INFORMATION
PCB Layout Considerations: SynQor recommends that the
customer use a non-solder mask defined pad design. The
minimum recommended pad size is 0.074” x 0.122” (1.88mm
x 3.1mm) and the maximum pad size is 0.095” x 0.140”
(2.41mm x 3.56mm), see the mechanical diagram on page
2. Interconnection to internal power planes is typically
required. This can be accomplished by placing a number
of vias between the SMT pad and the relevant plane. The
number and location of the vias should be determined based
on electrical resistance, current and thermal requirements.
“Via-in-pad” design should be avoided in the SMT pads.
Solder mask should be used to eliminate solder wicking into
the vias.
6.0 - 16.0V
0.75 - 5.0V
10A
SMT
Reflow Soldering Guidelines: Figure J shows a typical reflow
profile for a eutectic solder process. Due to variations in
customer applications, materials and processes, it is not feasible for SynQor to recommend a specific reflow profile. The
customer should use this profile as a guideline only. Since
the NiQor surface mount modules have a larger thermal
mass and lower thermal resistance than standard SMT components, it may be necessary to optimize the solder reflow
profile based on limitations of the other components on the
customer board. Sufficient reflow time must be allowed to
fuse the plating on the connection to ensure a reliable solder joint. The solder reflow profile should be confirmed by
accurately measuring the SMT interconnect leads. Maximum
case temperature of 260°C (exposure for 5 seconds or less) is
not exceeded for the NiQor units.
Moisture Sensitivity: The NiQor surface mount modules
have an MSL rating 1 per IPC/JEDEC J-STD-033A.
Cleaning and Drying: When possible, a no-clean solder paste
system should be used to solder the NiQor SMT units to their
application board. The modules are suitable for aqueous
washing, however, the user must ensure sufficient drying to
remove all water from the converter before powering up.
Inadequate cleaning and drying can affect the reliability of
the converter and the testing of the final assembly.
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].
Pick and Place: The NiQor surface mount modules are
designed for automated assembly using standard SMT pick
and place equipment. The modules have a centrally located
inductor component with a flat surface area to be used for
component pick-up. The units use open frame construction
and have a low mass that is within the capability of standard
pick and place equipment. Those modules however have
a larger mass than most conventional SMT
components and so variables such as nozzle
Maximum Temperature (+210-260 C)
size, tip style, handling speed, and placement
pressure should be optimized for best results.
A conformal tipped placement nozzle design
Eutectic Solder Melting Point (+183 C)
is recommended. Coplanarity of better than
0.004” (0.1mm) is achieved through the SMT
(+150-155 C)
NiQor’s terminal design.
o
o
o
Pre-heat
•<
Reflow
Soak
2.5 C/sec
o
Cool Down
• 0.5-0.6oC/sec
• 1.3-1.6oC/sec
• 60
• 30
to 90 sec.,
typ., 2 min max
to 60 sec., typ.,
90 sec max
2 to 4 min.
Figure H: Typical Eutectic (96.5Sn/3.0Ag/0.5Cu) Solder Profile
Product # NQ16W50SKA10
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-NS15W10 Rev. C
03/23/10
Page 11
Input:
Outputs:
Current:
Package:
Technical Specification
6.0 - 16.0V
0.75 - 5.0V
10A
SMT
PART NUMBERING SYSTEM
ORDERING INFORMATION
The part numbering system for SynQor’s NiQor DC/DC
converters follows the format shown in the example below.
The tables below show the valid model numbers and ordering
options for converters in this product family. When ordering
SynQor converters, please ensure that you use the complete
15 character part number consisting of the 12 character base
part number and the additional 3 characters for options.
A “-G” suffix indicates the product is 6/6 RoHS compliant.
N Q 16 W 50 S K A 1 0 P S S -
G
6/6 RoHS
Options (see
Ordering Information)
Output Current
Thermal Design
Performance Level
Package Size
The following option choices must be included in place of
Output Voltage
Input Voltage
Product Family
The first 12 characters comprise the base part number and
the last 3 characters indicate available options. A “-G” suffix
indicates the product is 6/6 RoHS compliant.
Application Notes
the x y z spaces in the model numbers listed above.
A variety of application notes and technical white papers
can be downloaded in pdf format from our website.
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.
Contact SynQor for further information:
Phone:978-849-0600
Toll Free:888-567-9596
Fax:978-849-0602
E-mail:[email protected]
Web:www.synqor.com
Address: 155 Swanson Road
Boxborough, MA 01719
USA
Product # NQ16W50SKA10
Phone 1-888-567-9596
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
7,765,687
7,787,261
8,023,290
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-NS15W10 Rev. C
03/23/10
Page 12