16A

Technical
S pecification
NQ04W33SMA16
2.4-6.0V
Input
0.75-3.6V
Outputs
16 Amp
Current
Non
Isolated
SMT
Sur face Mount
Th e N iQo r ® S M T D C / D C c o n v e r t e r i s a n o n - i s o l a t e d b u c k
regulator which employs synchronous rectification to
ach i e v e ex t re me ly h igh con v e rsi on e f fi ci e nc y. Th e N iQor
Non-Isolated
fa m ily of c on ve rt e rs i s u se d p re dom i na t e ly in DPA sys t em s
usi n g a fr ont en d DC/ DC h igh p ower b ri ck (4 8 Vi n t o low
vol ta ge b us ). T h es e n on -i sola t ed con ve rt e rs a re t h e n u se d
at the poi nt of loa d to c reat e the low v olt age out p ut s
requ ired b y t h e d esi gn. Th e w id e t ri m mod ule ca n be pro gram m e d t o a va ri et y of ou t pu t vol ta ge s t h rough t h e us e of
a single external resistor. RoHS compliant (see page 12 ).
NQ04W33SMA16 wide trim module
Operational Features
• Ultra high efficiency, up to 94% at full rated load
• Delivers up to 16 Amps of output current with minimal
derating - no heatsink required
• Input Voltage Range : 2.4 - 6.0V
• Programmable output voltages from 0.75 - 3.6V
• On-board input and output filter capacitor
• No minimum load requirement means no preload resistors required
Mechanical Features
• DOSA standard SMT pin-out configuration
• Industry standard size: 1.3” x 0.53” x 0.29” (33 x
13.5 x 7.3 mm)
• Available in SIP configuration
• Total weight: 0.18 oz. (5 grams), lower mass greatly reduces vibration and shock problems
• Open frame construction maximizes air flow cooling
Contr ol Features
• On/Off control
• Output voltage trim (industry standard) permits custom
voltages and voltage margining
• Remote Sense (standard option)
Product # NQ04W33SMA16
Phone 1-888-567-9596
www.synqor.com
Pr otection 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/cUL 60950-1 recognized (US & Canada)
• TUV certified to EN60950-1
• Meets 72/23/EEC and 93/68/EEC directives which
facilitates CE Marking in user’s end product
• Board and plastic components meet UL94V-0 flammability requirements
Doc.# 005-2NV4S3E Rev. D
05/21/2013
Page 1
Input:
Outputs:
Current:
Package:
Technical Specification
2.4 - 6.0V
0.75 - 3.6V
16A
SMT
MECHANICAL
DIAGRAM
Surface Mount Package
0.288+.018
1.30
(7.32+0.45)
(33.0)
see Note 4
0.025
(0.64)
1
2
3
4
5
0.075
(1.91)
0.063
(1.60)
0.405
(10.29)
Typ.
0.53
(13.5)
7
6
0.012+.007
0.297
(7.54)
0.048
0.487
0.100
(1.22)
(12.37)
(2.54)
(0.3+0.17)
0.063
Bottomside
Clearance
(1.6)
0.677
Typ.
(17.20)
Side View
0.867
(22.02)
1.057
(26.85)
1.177
(29.90)
Bottom View
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 1-7 is 0.004” max
5) Weight: 0.18 oz. (5 g) typical
6) Workmanship: Meets or exceeds IPC-A-610C Class II
Pin No.
Name
Function
1
N/C
No Connection
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
Product # NQ04W33SMA16
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-2NV4V3E Rev. D
05/21/13
Page 2
Input:
Outputs:
Current:
Package:
Technical Specification
2.4 - 6.0V
0.75 - 3.6V
16A
SMT
ELECTRICAL CHARACTERISTICS - NQ04W33SMA16 Series
Vin=3.3Vdc and 5.0Vdc except 3.3Vout units where Vin=5.0V; TA=25°C, airflow rate=300 LFM unless otherwise noted; full operating temperature range is -40°C to +105°C ambient temp with appropriate power derating. Specifications subject to change without notice.
Parameter
Module
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 (pk-pk\RMS)
“
“
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
TEMP LIMITS FOR POWER DERATING
Semiconductor Junction Temperature
Board Temperature
Product # NQ04W33SMA16
All
All
All
All
All
All
All
All
All
All
Min.
0
-40
-55
-3
2.4
100
0.75
0
All
All
All
0.75V
2.5V
3.3V
0.75V
2.5V
3.3V
All
All
All
0.75V
2.5V
3.3V
2.07
1.92
0.75V
All
All
0.745
0.75
0
All
All
All
All
0.75V
2.5V
3.3V
All
All
Typ.
Max.
Units
7
6
105
125
6
V
V
°C
°C
V
6
20
V
A
µF
V
A
3.6
16
2.21
2.01
0.2
2.35
2.10
6.28
11.16
15.33
106
119
124
10
0.1
30
37\11
70\21
60\18
20
100
0.750
22.4\6.0
33.2\10.3
30.8\8.5
24
V
V
V
A
A
A
mA
mA
mA
mA
A 2s
µF
mA
mA
mA
Notes & Conditions
Continuous
Continuous
Fast blow external fuse recommended
ESR<1.5W
2.4Vin; 100% load
3.6Vin; 100% load
3.6Vin; 100% load
5Vin
“
“
With min. output capacitance
5Vin; 100% load
0.755
3.60
16
V
V
A
0.5
0.5
1
3
%
%
%
%
mV
mV
mV
A
µF
With sense pin
“
“
With sense pin, over sample, line, load, temp. & life
Full load; 20MHz bandwidth; Figures 13 & 16
“
“
34
5000
5Vin 50% load
>0.5mohm
All
45
dB
120Hz; Figure 18
All
All
All
100
100
100
mV
mV
µs
All
All
All
2
2
All
All
Phone 1-888-567-9596
www.synqor.com
6
6
0
ms
ms
V
50%-75%-50% Iout max; 100uF; Figure 11
50%-75%-50% Iout max; 470uF; Figure 11
To within 1.5% Vout nom.; Figures 11 & 12
Figures 9 & 10
Resistive load
“
“
125
125
°C
°C
Package rated to 150°C; Figures 3 - 8
UL rated max operating temp 130°C
Doc.# 005-2NV4V3E Rev. D
05/21/13
Page 3
Input:
Outputs:
Current:
Package:
Technical Specification
2.4 - 6.0V
0.75 - 3.6V
16A
SMT
ELECTRICAL CHARACTERISTICS (continued) - NQ04W33SMA16 Series
Parameter
Module
EFFICIENCY
100% Load
“
“
50% Load
“
“
FEATURE CHARACTERISTICS
Switching Frequency
Open Logic (O) ON/OFF Control
Off-State Voltage
On-State Voltage
Input Resistance
Positive Logic (P) ON/OFF Control
Logic Low Voltage Range
Logic High Voltage Range (internal pullup)
Logic Low sink current
Logic High sink current (leakage)
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
Min.
0.75V
2.5V
3.3V
0.75V
2.5V
3.3V
Typ.
Max.
80.0
91.5
94.0
84.0
93.5
95.0
All
275
All
All
All
1.5
-3
All
All
All
All
All
All
All
All
-0.2
2.2
300
Units
%
%
%
%
%
%
325
kHz
6.5
0.6
V
V
kW
1
V
V
µA
µA
V
V
°C
°C
Notes & Conditions
Figures 1 & 2
“
“
“
“
“
Figure A
20
Open collector/drain input; Figure A
50
0.75
3.9
All
All
All
4.2
128
10
100
3.6
4.6
Measured Vout+ to common pins; Table 1
Over full temp range
Average PCB Temperature
106 Hrs. TR-NWT-000332; 100% load, 200LFM, 40oC Ta
106 Hrs. MIL-HDBK-217F; 100% load, 200LFM, 40oC Ta
106 Hrs. See our website for details
TBD
TBD
STANDARDS COMPLIANCE
Parameter P
Notes
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
File # E194341
Certified by TUV
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, continuous Vin applied except 5min./day
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.
OPTIONS
PATENTS
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.
SynQor is protected under various patents. Please consult the
last page for further details.
Product # NQ04W33SMA16
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-2NV4V3E Rev. D
05/21/13
Page 4
Input:
Outputs:
Current:
Package:
Technical Specification
100
4.0
95
3.5
Power Dissipation (W)
Efficiency (%)
90
85
80
75
3.3 Vout
1.8 Vout
0.75 Vout
70
2.4 - 6.0V
0.75 - 3.6V
16A
SMT
3.0
2.5
2.0
1.5
1.0
3.3 Vout
1.8 Vout
0.5
65
0.75 Vout
0.0
0
2
4
6
8
10
12
14
16
0
Load Current (A)
2
4
6
8
10
12
14
16
Load Current (A)
Figure 1: Efficiency at nominal output voltage vs. load current for nominal input voltage at 25°C.
Figure 2: Power dissipation at nominal output voltage vs. load current
for nominal input voltage at 25°C.
18
16
14
Iout (A)
12
10
8
400 LFM (2.0 m/s)
6
300 LFM (1.5 m/s)
4
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
2
6 layers 2oz cu board
Semiconductor junction temperature is
within 1°C of surface temperature
0
0
25
40
55
70
85
Ambient Air Temperature (°C)
Figure 3: Maximum output power derating curves for 0.75Vo, 1.2Vo
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
16 amp load current mounted on a 85°C, 6-Layer, 2 oz. copper board
(typical installation).
18
16
14
Iout (A)
12
10
8
400 LFM (2.0 m/s)
6
300 LFM (1.5 m/s)
4
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
2
6 layers 2oz cu board
Semiconductor junction temperature is
within 1°C of surface temperature
0
0
25
40
55
70
85
Ambient Air Temperature (°C)
Figure 5: Maximum output power derating curves for 1.5Vo, 1.8Vo
units under various thermal conditions and nominal input voltage. See
Thermal Considerations section for more details.
Product # NQ04W33SMA16
Phone 1-888-567-9596
Figure 6: Thermal plot of 1.5Vo, 1.8Vo converters at nominal Vin and
16 amp load current mounted on a 85°C, 6-Layer, 2 oz. copper board
(typical installation).
www.synqor.com
Doc.# 005-2NV4V3E Rev. D
05/21/13
Page 5
Input:
Outputs:
Current:
Package:
Technical Specification
2.4 - 6.0V
0.75 - 3.6V
16A
SMT
18
16
14
Iout (A)
12
10
8
400 LFM (2.0 m/s)
6
300 LFM (1.5 m/s)
4
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
2
6 layers 2oz cu board
Semiconductor junction temperature is
within 1°C of surface temperature
0
0
25
40
55
70
85
Ambient Air Temperature (°C)
Figure 7: Maximum output power derating curves for 2.5Vo, 3.3Vo
units under various thermal conditions and nominal input voltage. See
Thermal Considerations section for more details.
Figure 8: Thermal plot of 2.5Vo, 3.3Vo converters at nominal Vin and
16 amp load current mounted on a 85°C, 6-Layer, 2 oz. copper board
(typical installation).
3.3Vout
3.3Vout
2.5Vout
2.5Vout
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)
0.75Vout
0.75Vout
2.5Vout
2.5Vout
3.3Vout
3.3Vout
Iout
Iout
Figure 11: Output voltage response for 0.75V, 2.5V, 3.3V units to step-change
in load current (50-75-50% of Iout max; di/dt=0.1A/µ s). Load cap: 100µ F,
100mW ESR tant, 10µ F cer. Ch 1: Iout (10A/div), Ch 2-4: Vout (100mV/div).
Product # NQ04W33SMA16
Phone 1-888-567-9596
Figure 12: Output voltage response for 0.75V, 2.5V, 3.3V units to step-change
in load current (50-75-50% of Iout max; di/dt=3A/µ s). Load cap: 470mF,
100mW ESR tant, 10mF cer. Ch 1: Iout (10A/div), Ch 2-4: Vout (200mV/div).
www.synqor.com
Doc.# 005-2NV4V3E Rev. D
05/21/13
Page 6
Input:
Outputs:
Current:
Package:
Technical Specification
2.4 - 6.0V
0.75 - 3.6V
16A
SMT
See Fig. 14
1 µH
source
impedance
See Fig. 15
iS
VIN
VSOURCE
See Fig. 16
0.75Vout
VOUT
2.5Vout
DC/DC
Converter
22 µF
C*
100 µF
ceramic 100mW ESR
capacitor
tantalum
capacitor
* 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).
3.3Vout
Figure 14: Input Reflected Ripple Current, is, through a 1 µ H source
inductor at nominal input voltage and rated load current (100 mA/div).
See Figure 13.
0.75Vout
0.75Vout
2.5Vout
2.5Vout
3.3Vout
3.3Vout
Figure 15: Input Terminal Ripple Voltage at nominal input voltage and
rated load current (200 mV/div). Load capacitance: 22µ F ceramic cap
and 100µ F tantalum cap. Bandwidth: 20 MHz. See Figure 13.
Figure 16: Output Voltage Ripple at nominal input voltage and rated
load current (20 mV/div). Load capacitance: 22µ F ceramic cap and
100µ F tantalum cap.. Bandwidth: 20 MHz. See Figure 13.
1
0
Forward Transmission (dB)
Output Impedance (ohms)
-10
0.1
0.01
0.001
3.3 Vout
2.5 Vout
0.75 Vout
-20
-30
-40
-50
-60
-70
3.3 Vout
2.5 Vout
-80
0.75 Vout
-90
0.0001
10
100
1,000
10,000
10
100,000
Figure 17: Magnitude of incremental output impedance (Zout =
vout/iout) for nominal input voltage at full rated power with 100µ F tantalum output capacitor.
Product # NQ04W33SMA16
Phone 1-888-567-9596
100
1,000
10,000
100,000
1,000,000
Hz
Hz
Figure 18: Magnitude of incremental forward transmission (FT =
vout/vin) for nominal input voltage at full rated power with 100µ F tantalum output capacitor.
www.synqor.com
Doc.# 005-2NV4V3E Rev. D
05/21/13
Page 7
Input:
Outputs:
Current:
Package:
15
100
5
10
Input Impedance (ohms)
Reverse Transmission (dB)
Technical Specification
-5
-15
-25
3.3 Vout
-35
1
0.1
0.01
3.3 Vout
2.5 Vout
0.001
2.5 Vout
2.4 - 6.0V
0.75 - 3.6V
16A
SMT
0.75 Vout
0.75 Vout
-45
0.0001
10
100
1,000
10,000
100,000
1,000,000
10
Hz
Phone 1-888-567-9596
1,000
10,000
100,000
Hz
Figure 19: Magnitude of incremental reverse transmission (RT =
iin/iout) for nominal input voltage at full rated power with 100µ F tantalum output capacitor.
Product # NQ04W33SMA16
100
Figure 20: Magnitude of incremental input impedance (Zin = vin/iin)
for nominal input voltage at full rated power with 100µ F tantalum output capacitor.
www.synqor.com
Doc.# 005-2NV4V3E Rev. D
05/21/13
Page 8
Input:
Outputs:
Current:
Package:
Technical Specification
BASIC OPERATION AND FEATURES
For a desired increase of the nominal output voltage, the value of
the resistor should be:
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.
Rtrim-up =
CONTROL FEATURES
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.
Option
P Logic
O Logic
Pin-Open
Float
Voltage
5
0
Description
Positive/Open
Negative/Open
Pin-Open
Converter
State
On
On
Pin Action
Pull Low = Off
Pull High = Off
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.
On/Off
Gnd
VDES - 0.7525
_ 5110 (W)
VOUT = 0.7525 +
where
21070
Rtrim-up + 5110
(W)
VDES = 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.
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 overcurrent protection. When the over-current protection is triggered,
the unit enters hiccup mode. The units operate normally once the
fault condition is removed.
Vout
Sense+
Vin
21070
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.
The NiQor series of SIPs and SMT converters uses the established
industry standard footprint and pin-out configurations.
2.4 - 6.0V
0.75 - 3.6V
16A
SMT
Trim
Rtrim-up
Internal Over-Voltage Protection: To fully protect from
excessive output voltage, the NQ04 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 4.2V, in the wide-trim
W33 model.
Product # NQ04W33SMA16
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-2NV4V3E Rev. D
05/21/13
Page 9
Input:
Outputs:
Current:
Package:
Technical Specification
The shutdown point is fixed on standard option. SMA also offers
adjustable OVP set point. For more detailed information contact
SynQor technical support.
Over-Temperature Shutdown: A temperature sensor on the
converter senses the average temperature of the module. The
thermal shutdown circuit is designed to turn the converter off
when the temperature at the sensed location reaches the OverTemperature Shutdown value. It will allow the converter to turn
on again when the temperature of the sensed location falls by the
amount of the Over-Temperature Shutdown Restart Hysteresis
value.
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.
2.4 - 6.0V
0.75 - 3.6V
16A
SMT
put of the SMA16 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.
The output impedance
of these converters can
be quite accurately
modeled from DC to
about 100kHz as
shown in Figure F. A
further simplified version of it, valid below
40Hz and above
1kHz, is shown in
Figure G.
In the
SMA16
case,
the
modFigure F: NQ04 Passive Output Model
els depict the minimum
recommended output capacitance, Ct with its resistance Rt. In
the VMA16 family, that capacitor is again included in the converter.
If the dynamic characteristics of the load
are known, any standard simulator can
use these models to
predict the in-circuit
transient response.
Figure E: NQ04 converter with Input Filter
In the SMA16 (surface mount) converters Cin = 30µF of high
quality ceramic capacitors. With Lin of 1µH, Cd should be 100200µF 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.
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.
Figure G: Simplified NQ04 Output Model
Figure H: Converter with Additional Output Capacitance
For minimal overshoot upon recovery, Cd should be related to the
minimum in-circuit net ESR.
Cd >
parallel (L1, L2)
ESRdmin2
For more detailed derivations of these values contact SynQor
technical support.
Output Capacitance: It is recommended to add at least
100µF of capacitance, with an ESR in the 0.1W range, to the outProduct # NQ04W33SMA16
Phone 1-888-567-9596
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Doc.# 005-2NV4V3E Rev. D
05/21/13
Page 10
Input:
Outputs:
Current:
Package:
Technical Specification
Thermal Performance (SMA16): While impossible to be
exact, a simplified thermal model for the mounted converter is
detailed below.
Figure I: Thermal Model for NQ04 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.
2.4 - 6.0V
0.75 - 3.6V
16A
SMT
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.
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 size, tip style, handling speed, and placement pressure
should be optimized for best results. A conformal tipped placement nozzle design is recommended. Coplanarity of better than
0.004" (0.1mm) is achieved through the SMT NiQor's terminal
design.
• 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.
• 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.
Product # NQ04W33SMA16
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-2NV4V3E Rev. D
05/21/13
Page 11
Technical
S pecification
NQ04W33SMA16
Reflow Soldering Guidelines: Figure J
Maximum Temperature (+210-260 C)
shows a typical reflow profile for a eutectic solder process. Due to variations in customer
applications, materials and processes, it is not
Eutectic Solder Melting Point (+183 C)
feasible for SynQor to recommend a specific
reflow profile. The customer should use this profile as a guideline only. Since the NiQor sur(+150-155 C)
face mount modules have a larger thermal mass
and lower thermal resistance than standard
Pre-heat
Reflow
Cool Down
Soak
SMT components, it may be necessary to optimize the solder reflow profile based on limita• 0.5-0.6 C/sec
• 1.3-1.6 C/sec
tions of the other components on the customer
• 60 to 90 sec.,
• 30 to 60 sec., typ.,
• < 2.5 C/sec
typ., 2 min max
90 sec max
board. Sufficient reflow time must be allowed to
fuse the plating on the connection to ensure a
reliable solder joint. The solder reflow profile
2 to 4 min.
should be confirmed by accurately measuring
the SMT interconnect leads. Maximum case
temperature of 260°C (exposure for 5 seconds Figure J: Typical Eutectic (96.5Sn/3.0Ag/0.5Cu) Solder Profile
or less) is not exceeded for the NiQor units.
RoHS Compliance:
The EU led RoHS (Restriction of
Moisture Sensitivity: The NiQor surface mount modules have
Hazardous Substances) Directive bans the use of Lead,
an MSL rating 1 per IPC/JEDEC J-STD-033A.
Cadmium, Hexavalent Chromium, Mercury, Polybrominated
Cleaning and Drying: When possible, a no-clean solder
Biphenyls (PBB), and Polybrominated Diphenyl Ether (PBDE) in
paste system should be used to solder the NiQor SMT units to
Electrical and Electronic Equipment. This SynQor product is 6/6
their application board. The modules are suitable for aqueous
RoHS compliant. For more information please refer to SynQor’s
washing, however, the user must ensure sufficient drying to
RoHS addendum available at our RoHS Compliance / Lead Free
remove all water from the converter before powering up.
Initiative web page or e-mail us at [email protected]
Inadequate cleaning and drying can affect the reliability of the
converter and the testing of the final assembly.
o
o
o
o
o
o
Product # NQ04W33SMA16
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-2NV4S3E Rev. D
05/21/2013
Page 12
Input:
Outputs:
Current:
Package:
Technical Specification
2.4 - 6.0V
0.75 - 3.6V
16A
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.
NQ 04 W33 S M A 16 P S S - G
6/6 RoHS
Options
(see
Ordering Information)
Output Current
Thermal Design
Model Number
Input Voltage
NQ04W33SMA16xyz -G
2.4 - 6.0 V
Output Max Output
Voltage
Current
0.75-3.6V
16 A
Performance Level
The following option choices must be included in place of the
x y z spaces in the model numbers listed above.
Package Size
Output Voltage
Input Voltage
Options Descriptiion: x y z
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.
Enabled Logic
P - Pos. / Open
O - Neg. / Open
Pin Style
S - Standard
Feature Set
S - Sense
N - None
Application Notes
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.
5,999,417
6,731,520
7,072,190
7,272,023
8,023,290
6,222,742
6,894,468
7,085,146
7,558,083
8,149,597
6,545,890
6,896,526
7,119,524
7,564,702
6,577,109
6,927,987
7,269,034
7,765,687
6,594,159
7,050,309
7,272,021
7,787,261
Contact SynQor for further information and to order:
Phone:
Toll Free:
Fax:
E-mail:
Web:
Address:
Product # NQ04W33SMA16
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.# 005-2NV4V3E Rev. D
05/21/13
Page 13
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