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Data Sheet July 28, 2009
Naos Raptor 20A: Non-Isolated Power Modules 4.5 - 14Vdc input; 0.59Vdc to 6Vdc Output; 20A Output Current
Features
Compliant to RoHS EU Directive 2002/95/EC (Z versions) Compatible in a Pb-free or SnPb wave-soldering environment (Z versions) Wide input voltage range (4.5Vdc-14Vdc) Output voltage programmable from 0.59Vdc to 6Vdc via external resistor Tunable Loop response
TM
to optimize dynamic output voltage
RoHS Compliant Applications
Distributed power architectures Intermediate bus voltage applications Telecommunications equipment Servers and storage applications Networking equipment
Fixed switching frequency Output overcurrent protection (non-latching) Over temperature protection Remote On/Off Remote Sense Power Good Signal Small size: 36.8 mm x 15.5 mm x 9.2 mm (1.45 in. x 0.61 in. x 0.36 in) Wide operating temperature range (-40C to 85C) UL* 60950 Recognized, CSA C22.2 No. 60950-00 Certified, and VDE 0805 (EN60950-1 3rd edition) Licensed ISO** 9001 and ISO 14001 certified manufacturing facilities
Description
The Naos Raptor 20A SIP power modules are non-isolated dc-dc converters in an industry standard package that can deliver up to 20A of output current with a full load efficiency of 91% at 3.3Vdc output voltage (VIN = 12Vdc). These modules operate over a wide range of input voltage (VIN = 4.5Vdc-13.8Vdc) and provide a precisely regulated output voltage from 0.59Vdc to 6Vdc, programmable via an external resistor. Features include remote On/Off, adjustable output voltage, over current and over temperature protection. A new feature, the Tunable LoopTM, allows the user to optimize the dynamic response of the converter to match the load.
* UL is a registered trademark of Underwriters Laboratories, Inc.

CSA is a registered trademark of Canadian Standards Association. VDE is a trademark of Verband Deutscher Elektrotechniker e.V. ** ISO is a registered trademark of the International Organization of Standards
Document No: DS06-127 ver. 1.07 PDF name: NSR020A0X_ds.pdf
Data Sheet July 28, 2009
Naos Raptor 20A: Non Isolated Power Module: 4.5 - 14Vdc input; 0.59Vdc to 6Vdc Output; 20A output current
Absolute Maximum Ratings
Stresses in excess of the absolute maximum ratings can cause permanent damage to the device. These are absolute stress ratings only, functional operation of the device is not implied at these or any other conditions in excess of those given in the operations sections of the data sheet. Exposure to absolute maximum ratings for extended periods can adversely affect the device reliability.
Parameter Input Voltage Continuous Operating Ambient Temperature (see Thermal Considerations section) Storage Temperature All Tstg -55 125 C All All VIN TA -0.3 -40 15 85 Vdc C Device Symbol Min Max Unit
Electrical Specifications
Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature conditions.
Parameter Operating Input Voltage Maximum Input Current (VIN= VIN, min to VIN, max, IO=IO, max VO,set = 3.3Vdc) Input No Load Current (VIN = 12Vdc, IO = 0, module enabled) Input Stand-by Current (VIN = 12Vdc, module disabled) Inrush Transient Input Reflected Ripple Current, peak-to-peak (5Hz to 20MHz, 1H source impedance; VIN, min to VIN, max, IO= IOmax ; See Test configuration section) Input Ripple Rejection (120Hz) All All All It 34.4 43
2
Device All All VO,set = 0.6 Vdc VO,set = 5.0Vdc All
Symbol VIN IIN,max IIN,No load IIN,No load IIN,stand-by
Min 4.5
Typ 12.0
Max 13.8 20
Unit Vdc Adc mA mA mA
50 110 6.08
1
As mAp-p dB
2
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Data Sheet July 28, 2009
Naos Raptor 20A: Non Isolated Power Module: 4.5 - 14Vdc input; 0.59Vdc to 6Vdc Output; 20A output current
Electrical Specifications (continued)
Parameter Output Voltage Set-point (with 0.5% tolerance for external resistor used to set output voltage) Output Voltage (Over all operating input voltage, resistive load, and temperature conditions until end of life) Adjustment Range Selected by an external resistor Output Regulation (for VO 2.5V) Line (VIN=VIN, min to VIN, max) Load (IO=IO, min to IO, max Output Regulation (for VO < 2.5V) Line (VIN=VIN, min to VIN, max) Load (IO=IO, min to IO, max) Output Ripple and Noise on nominal output (VIN=VIN, nom and IO=IO, min to IO, max, Cout = 0F) Peak-to-Peak (5Hz to 20MHz bandwidth) Peak-to-Peak (5Hz to 20MHz bandwidth) Peak-to-Peak (5Hz to 20MHz bandwidth) Peak-to-Peak (5Hz to 20MHz bandwidth) Peak-to-Peak (5Hz to 20MHz bandwidth) Peak-to-Peak (5Hz to 20MHz bandwidth) Peak-to-Peak (5Hz to 20MHz bandwidth) External Capacitance ESR 1 m With the Tunable Loop ESR 0.15 m ESR 10 m Output Current Output Current Limit Inception (Hiccup Mode ) Output Short-Circuit Current (VO250mV) ( Hiccup Mode ) Efficiency (Vin=9Vdc) VO,set = 0.59Vdc VO,set = 1.2Vdc VO,set = 1.8Vdc VO,set = 2.5Vdc VO,set = 3.3Vdc VO,set = 5.0Vdc VO,set = 6.0Vdc Switching Frequency All fsw 72.7 82.3 87.5 90.2 92.1 94.3 95.0 600 % % % % % % % kHz VIN= 12Vdc, TA=25C IO=IO, max , VO= VO,set
TM 1 TM
Device All All
Symbol VO, set VO, set
Min -1.5 -3.0
Typ
Max +1.5
Unit % VO, set % VO, set
+3.0
All
VO
0.59
6
Vdc
All All All All
-0.2

+0.2 0.8 +5 20
% VO, set % VO, set mV mV
-5

Vo = 0.59V Vo = 1.2V Vo = 1.8V Vo = 2.5V Vo = 3.3V Vo = 5.0V Vo = 6.0V

20 23 25 30 40 50 60
mVpk-pk mVpk-pk mVpk-pk mVpk-pk mVpk-pk mVpk-pk mVpk-pk
Without the Tunable Loop
All All All All All All
CO, max CO, max CO, max Io IO, lim IO, s/c
0 0 0
140 1.1
300 1500 10000 20
F F F Adc % Io Arms
1
External capacitors may require using the new Tunable Loop feature to ensure that the module is stable as well as TM getting the best transient response. See the Tunable Loop section for details.
TM
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Data Sheet July 28, 2009
Naos Raptor 20A: Non Isolated Power Module: 4.5 - 14Vdc input; 0.59Vdc to 6Vdc Output; 20A output current
General Specifications
Parameter Calculated MTBF (VIN=12V, VO=5Vdc, IO=0.8IO, max, TA=40C) Per Telcordia Issue 2, Method I Case 3 Weight Min Typ 16,061,773 6.6 (0.23) Max Unit Hours g (oz.)
Feature Specifications
Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature conditions. See Feature Descriptions for additional information.
Parameter On/Off Signal Interface (VIN=VIN, min to VIN, max ; open collector or equivalent, Signal referenced to GND) Logic High (Enable pin open - Module ON) Input High Current Input High Voltage Logic Low (Module OFF) Input Low Current Input Low Voltage PwGood (Power Good) Signal Interface Open Collector/Drain PwGood = High = Power Good PwGood = Low = Power Not Good Logic level low voltage, Isink = 5 mA Sink Current, PwGood = low Turn-On Delay and Rise Times (VIN=VIN, nom, IO=IO, max , VO to within 1% of steady state) Case 1: Enable input is enabled and then input power is applied (delay from instant at which VIN = VIN, min until Vo = 10% of Vo, set) Case 2: Input power is applied for at least one second and then the Enable input is enabled (delay from instant at which Enable is enabled until Vo = 10% of Vo, set) Output voltage Rise time (time for Vo to rise from 10% of Vo, set to 90% of Vo, set) Output voltage overshoot o IO = IO, max; VIN, min - VIN, max, TA = 25 C Remote Sense Range Over Temperature Protection (See Thermal Considerations section) Input Undervoltage Lockout Turn-on Threshold Turn-off Threshold All All 4.2 4.1 Vdc Vdc All All Tref 130 All Tdelay 2 3 msec 0 0.35 10 V mA All All IIL VIL -0.3 200 0.4 A V All All IIH VIH 0 1.0 0.5 5.5 mA V Device Symbol Min Typ Max Unit
All
Tdelay
2
3
msec
All
Trise
3
6 0.5 0.5
msec % VO, set V C
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Data Sheet July 28, 2009
Naos Raptor 20A: Non Isolated Power Module: 4.5 - 14Vdc input; 0.59Vdc to 6Vdc Output; 20A output current
Characteristic Curves
The following figures provide typical characteristics for the Naos Raptor 20A modules at 0.6Vout and 25C.
90 85
22 20
OUTPUT CURRENT, Io (A)
EFFICIENCY, (%)
80 Vin = 6V 75 70 65 60 0 5 10 15 20 Vin = 4.5V Vin = 9V
18 16 14 12 10 8 25 35 45 55 65
O
2m/s (400LFM) 1m/s (200LFM) NC 0.5m/s (100LFM)
1.5m/s (300LFM)
75
85
OUTPUT CURRENT, IO (A)
AMBIENT TEMPERATURE, TA C
Figure 1. Converter Efficiency versus Output Current.
Figure 2. Derating Output Current versus Ambient Temperature and Airflow.
OUTPUT VOLTAGE OUTPUT CURRENT, VO (V) (200mV/div) IO (A) (5Adiv)
OUTPUT VOLTAGE
VO (V) (10mV/div)
TIME, t (1s/div)
TIME, t (100s /div)
Figure 3. Typical output ripple and noise (VIN = 9V, Io = Io,max).
ON/OFF VOLTAGE
Figure 4. Transient Response to Dynamic Load Change from 0% to 50% to 0% with VIN=9V.
VON/OFF (V) (2V/div)
INPUT VOLTAGE OUTPUT VOLTAGE
OUTPUT VOLTAGE
VO (V) (200mV/div)
TIME, t (1ms/div)
VO (V) (200mV/div)
VIN (V) (5V/div)
TIME, t (1ms/div)
Figure 5. Typical Start-up Using On/Off Voltage (Io = Io,max).
Figure 6. Typical Start-up Using Input Voltage (VIN = 9V, Io = Io,max).
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Data Sheet July 28, 2009
Naos Raptor 20A: Non Isolated Power Module: 4.5 - 14Vdc input; 0.59Vdc to 6Vdc Output; 20A output current
Characteristic Curves (continued)
The following figures provide typical characteristics for the Naos Raptor 20A modules at 1.2Vout and 25C.
95
22 20
OUTPUT CURRENT, Io (A)
90
EFFICIENCY, (%)
Vin = 4.5V 85 Vin = 12V 80 Vin = 14V
18 16 14 12 10 8 25 35 45 55 65
O
2m/s (400LFM) 1.5m/s (300LFM) 1m/s (200LFM) 0.5m/s (100LFM)
75
NC
70 0 5 10 15 20
75
85
OUTPUT CURRENT, IO (A)
AMBIENT TEMPERATURE, TA C
Figure 7. Converter Efficiency versus Output Current.
Figure 8. Derating Output Current versus Ambient Temperature and Airflow.
OUTPUT VOLTAGE OUTPUT CURRENT, VO (V) (200mV/div) IO (A) (5Adiv)
OUTPUT VOLTAGE
VO (V) (10mV/div)
TIME, t (1s/div)
TIME, t (20s /div)
Figure 9. Typical output ripple and noise (VIN = 12V, Io = Io,max).
ON/OFF VOLTAGE VON/OFF (V) (2V/div)
Figure 10. Transient Response to Dynamic Load Change from 0% to 50% to 0% with VIN=12V.
INPUT VOLTAGE OUTPUT VOLTAGE VIN (V) (5V/div) VO (V) (500mV/div)
OUTPUT VOLTAGE
VO (V) (500mV/div)
TIME, t (1ms/div)
TIME, t (1ms/div)
Figure 11. Typical Start-up Using On/Off Voltage (Io = Io,max).
Figure 12. Typical Start-up Using Input Voltage (VIN = 12V, Io = Io,max).
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Data Sheet July 28, 2009
Naos Raptor 20A: Non Isolated Power Module: 4.5 - 14Vdc input; 0.59Vdc to 6Vdc Output; 20A output current
Characteristic Curves (continued)
The following figures provide typical characteristics for the Naos Raptor 20A modules at 1.8Vout and at 25C.
100 95 22 20
OUTPUT CURRENT, Io (A)
EFFICIENCY, (%)
90 85 80 75 70 0 5 10 15 20 Vin = 12V Vin = 4.5V
18 16 14 12 10 8 25 35 45 55 65
O
2m/s (400LFM) 1.5m/s (300LFM) 1m/s (200LFM) 0.5m/s (100LFM) NC
Vin = 14V
75
85
OUTPUT CURRENT, IO (A)
AMBIENT TEMPERATURE, TA C
Figure 13. Converter Efficiency versus Output Current.
Figure 14. Derating Output Current versus Ambient Temperature and Airflow.
OUTPUT VOLTAGE OUTPUT CURRENT, VO (V) (200mV/div) IO (A) (5Adiv)
OUTPUT VOLTAGE
VO (V) (10mV/div)
TIME, t (1s/div)
TIME, t (100s /div)
Figure 15. Typical output ripple and noise (VIN = 12V, Io = Io,max).
ON/OFF VOLTAGE VON/OFF (V) (2V/div)
Figure 16. Transient Response to Dynamic Load Change from 0% to 50% to 0% with VIN=12V.
INPUT VOLTAGE OUTPUT VOLTAGE VIN (V) (5V/div) VO (V) (500mV/div)
OUTPUT VOLTAGE
VO (V) (500mV/div)
TIME, t (1ms/div)
TIME, t (1ms/div)
Figure 17. Typical Start-up Using On/Off Voltage (Io = Io,max).
Figure 18. Typical Start-up Using Input Voltage (VIN = 12V, Io = Io,max).
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Data Sheet July 28, 2009
Naos Raptor 20A: Non Isolated Power Module: 4.5 - 14Vdc input; 0.59Vdc to 6Vdc Output; 20A output current
Characteristic Curves (continued)
The following figures provide thermal derating curves for Naos Raptor 20A modules at 2.5Vout and 25C.
100 95 22 20
OUTPUT CURRENT, Io (A)
EFFICIENCY, (%)
90 85 80 75 70 0 5 10 15 20 Vin = 12V Vin = 4.5V Vin = 14V
18 16 14 12 10 8 25 35 45 55 65
O
2m/s (400LFM) 1.5m/s (300LFM) 1m/s (200LFM) 0.5m/s (100LFM)
NC
75
85
OUTPUT CURRENT, IO (A)
AMBIENT TEMPERATURE, TA C
Figure 19. Converter Efficiency versus Output Current.
Figure 20. Derating Output Current versus Ambient Temperature and Airflow.
OUTPUT VOLTAGE OUTPUT CURRENT, VO (V) (200mV/div) IO (A) (5Adiv)
OUTPUT VOLTAGE
VO (V) (10mV/div)
TIME, t (1s/div)
TIME, t (100s /div)
Figure 21. Typical output ripple and noise (VIN = 12V, Io = Io,max).
ON/OFF VOLTAGE VON/OFF (V) (2V/div)
Figure 22. Transient Response to Dynamic Load Change from 0% to 50% to 0% with VIN=12V.
INPUT VOLTAGE OUTPUT VOLTAGE
OUTPUT VOLTAGE
TIME, t (1ms/div)
VO (V) (1V/div)
VO (V) (1V/div)
VIN (V) (5V/div)
TIME, t (1ms/div)
Figure 23. Typical Start-up Using On/Off Voltage (Io = Io,max).
Figure 24. Typical Start-up Using Input Voltage (VIN = 12V, Io = Io,max).
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Data Sheet July 28, 2009
Naos Raptor 20A: Non Isolated Power Module: 4.5 - 14Vdc input; 0.59Vdc to 6Vdc Output; 20A output current
Characteristic Curves (continued)
The following figures provide thermal derating curves for Naos Raptor 20A modules at 3.3Vout and 25C.
100
22 20
95
OUTPUT CURRENT, Io (A)
EFFICIENCY, (%)
18 16 14 12 10 8 25 35 45 55 65
O
90
Vin = 4.5V
Vin = 12V Vin = 14V
2m/s (400LFM) 1.5m/s (300LFM) 1m/s (200LFM) 0.5m/s (100LFM)
85
NC
80 0 5 10 15 20
75
85
OUTPUT CURRENT, IO (A)
AMBIENT TEMPERATURE, TA C
Figure 25. Converter Efficiency versus Output Current.
Figure 26. Derating Output Current versus Ambient Temperature and Airflow.
OUTPUT VOLTAGE OUTPUT CURRENT, VO (V) (200mV/div) IO (A) (5Adiv)
OUTPUT VOLTAGE
VO (V) (10mV/div)
TIME, t (1s/div)
TIME, t (100s /div)
Figure 27. Typical output ripple and noise (VIN = 12V, Io = Io,max).
VON/OFF (V) (2V/div) ON/OFF VOLTAGE
Figure 28. Transient Response to Dynamic Load Change from 0% to 50% to 0% with VIN=12V.
INPUT VOLTAGE OUTPUT VOLTAGE
OUTPUT VOLTAGE
VO (V) (1V/div)
TIME, t (1ms/div)
VO (V) (1V/div)
VIN (V) (5V/div)
TIME, t (1ms/div)
Figure 29. Typical Start-up Using On/Off Voltage (Io = Io,max).
Figure 30. Typical Start-up Using Input Voltage (VIN = 12V, Io = Io,max).
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Data Sheet July 28, 2009
Naos Raptor 20A: Non Isolated Power Module: 4.5 - 14Vdc input; 0.59Vdc to 6Vdc Output; 20A output current
Characteristic Curves (continued)
The following figures provide thermal derating curves for Naos Raptor 20A modules at 5Vout and 25C.
100
22 20
95
OUTPUT CURRENT, Io (A)
EFFICIENCY, (%)
18 16 14 12 10 8 25 35 45 55 65
O
Vin = 12V 90 Vin = 6V
Vin = 14V
2m/s (400LFM) 1.5m/s (300LFM) 1m/s (200LFM) 0.5m/s (100LFM)
85
NC
80 0 5 10 15 20
75
85
OUTPUT CURRENT, IO (A)
AMBIENT TEMPERATURE, TA C
Figure 31. Converter Efficiency versus Output Current.
Figure 32. Derating Output Current versus Ambient Temperature and Airflow.
OUTPUT VOLTAGE OUTPUT CURRENT, VO (V) (200mV/div) IO (A) (5Adiv)
OUTPUT VOLTAGE
VO (V) (10mV/div)
TIME, t (1s/div)
TIME, t (100s /div)
Figure 33. Typical output ripple and noise (VIN = 12V, Io = Io,max).
ON/OFF VOLTAGE VON/OFF (V) (2V/div)
Figure 34. Transient Response to Dynamic Load Change from 0% to 50% to 0% with VIN=12V.
INPUT VOLTAGE OUTPUT VOLTAGE VIN (V) (5V/div) VO (V) (2V/div)
OUTPUT VOLTAGE
VO (V) (2V/div)
TIME, t (1ms/div)
TIME, t (1ms/div)
Figure 35. Typical Start-up Using On/Off Voltage (Io = Io,max).
Figure 36. Typical Start-up Using Input Voltage (VIN = 12V, Io = Io,max).
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Data Sheet July 28, 2009
Naos Raptor 20A: Non Isolated Power Module: 4.5 - 14Vdc input; 0.59Vdc to 6Vdc Output; 20A output current
Characteristic Curves (continued)
The following figures provide thermal derating curves for Naos Raptor 20A modules at 6Vout and 25C.
100
22 20
95
OUTPUT CURRENT, Io (A)
EFFICIENCY, (%)
18 16 14 12 10 8 25 35 45 55 65
O
Vin = 12V 90 Vin = 7.5V
Vin = 14V
2m/s (400LFM) 1.5m/s (300LFM) 1m/s (200LFM) 0.5m/s (100LFM)
85
NC
80 0 5 10 15 20
75
85
OUTPUT CURRENT, IO (A)
AMBIENT TEMPERATURE, TA C
Figure 37. Converter Efficiency versus Output Current.
Figure 38. Derating Output Current versus Ambient Temperature and Airflow.
OUTPUT VOLTAGE OUTPUT CURRENT, VO (V) (200mV/div) IO (A) (5Adiv)
OUTPUT VOLTAGE
VO (V) (10mV/div)
TIME, t (1s/div)
TIME, t (100s /div)
Figure 39. Typical output ripple and noise (VIN = 12V, Io = Io,max).
ON/OFF VOLTAGE VON/OFF (V) (2V/div)
Figure 40. Transient Response to Dynamic Load Change from 0% to 50% to 0% with VIN=12V.
INPUT VOLTAGE OUTPUT VOLTAGE VIN (V) (5V/div) VO (V) (2V/div)
OUTPUT VOLTAGE
VO (V) (2V/div)
TIME, t (1ms/div)
TIME, t (1ms/div)
Figure 41. Typical Start-up Using On/Off Voltage (Io = Io,max).
Figure 42. Typical Start-up Using Input Voltage (VIN = 12V, Io = Io,max).
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Data Sheet July 28, 2009
Naos Raptor 20A: Non Isolated Power Module: 4.5 - 14Vdc input; 0.59Vdc to 6Vdc Output; 20A output current
Test Configurations
TO OSCILLOSCOPE LTEST 1H VIN(+) CURRENT PROBE
Design Considerations
Input Filtering
The Naos Raptor 20A module should be connected to a low-impedance source. A highly inductive source can affect the stability of the module. An input capacitance must be placed directly adjacent to the input pin of the module, to minimize input ripple voltage and ensure module stability. To minimize input voltage ripple, low-ESR ceramic or polymer capacitors are recommended at the input of the module. Figure 46 shows the input ripple voltage for various output voltages at 20A of load current with 2x22 F or 4x22 F ceramic capacitors and an input of 12V.
90
BATTERY
CS 1000F Electrolytic E.S.R.<0.1 @ 20C 100kHz
CIN 2x100F Tantalum COM
NOTE: Measure input reflected ripple current with a simulated source inductance (LTEST) of 1H. Capacitor CS offsets possible battery impedance. Measure current as shown above.
Input Ripple Voltage (mVp-p)
Figure 43. Input Reflected Ripple Current Test Setup.
COPPER STRIP VO (+) 1uF COM . 10uF SCOPE RESISTIVE LOAD
80 70 60 50 40 30 20 10 0 0.5 1
2x22uF 4x22uF
GROUND PLANE NOTE: All voltage measurements to be taken at the module terminals, as shown above. If sockets are used then Kelvin connections are required at the module terminals to avoid measurement errors due to socket contact resistance.
1.5
2
2.5
3
3.5
4
4.5
5
Output Voltage (Vdc) Figure 46. Input ripple voltage for various output voltages with 2x22 F or 4x22 F ceramic capacitors at the input (20A load). Input voltage is 12V.
Figure 44. Output Ripple and Noise Test Setup.
Rdistribution
Rcontact VIN(+) VO
Rcontact
Rdistribution
Output Filtering
VIN VO RLOAD
Rdistribution
Rcontact COM COM
Rcontact
Rdistribution
NOTE: All voltage measurements to be taken at the module terminals, as shown above. If sockets are used then Kelvin connections are required at the module terminals to avoid measurement errors due to socket contact resistance.
The Naos Raptor 20A modules are designed for low output ripple voltage and will meet the maximum output ripple specification with no external capacitors. However, additional output filtering may be required by the system designer for a number of reasons. First, there may be a need to further reduce the output ripple and noise of the module. Second, the dynamic response characteristics may need to be customized to a particular load step change. To reduce the output ripple and improve the dynamic response to a step load change, additional capacitance at the output can be used. Low ESR ceramic and polymer are recommended to improve the dynamic response of the module. For stable operation of the module, limit the capacitance to less than the maximum output capacitance as specified in the electrical specification table. Optimal performance of the module can be achieved by using the Tunable LoopTM feature described later in this data sheet.
Figure 45. Output Voltage and Efficiency Test Setup.
VO. IO Efficiency = VIN. IIN x 100 %
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Data Sheet July 28, 2009
Naos Raptor 20A: Non Isolated Power Module: 4.5 - 14Vdc input; 0.59Vdc to 6Vdc Output; 20A output current
Safety Considerations
For safety agency approval the power module must be installed in compliance with the spacing and separation requirements of the end-use safety agency standards, i.e., UL 60950-1, CSA C22.2 No. 60950-1-03, and VDE 0850:2001-12 (EN60950-1) Licensed. For the converter output to be considered meeting the requirements of safety extra-low voltage (SELV), the input must meet SELV requirements. The power module has extra-low voltage (ELV) outputs when all inputs are ELV. An input fuse for the module is recommended. Due to the wide input voltage and output voltage ranges of the module, different fuse ratings are recommended as shown in Table 1. These are suggested "maximum" fuse ratings. However, for optimum circuit protection, the fuse value should not be any larger than required in the end application. As an option to using a fuse, no fuse is required, if the module is 1. powered by a power source with current limit protection set point less than the protection device value listed in Table 1, and 2. the module is evaluated in the end-use equipment. Table 1.
Input Output Voltage (VDC) Voltage 0.59 to 1.3 1.31 to 2.7 2.71 to 5.0 5.1 to 6 (VDC) 10.1 to 14 5A 10A 15A 20A 6.51 to 10 6.3A 15A 25A 30A 4.5 to 6.5 10A 20A 30A NA
Feature Descriptions
Enable (Remote On/Off)
The Naos Raptor 20A modules feature an Enable pin with positive logic for remote On/Off operation. If not using the Enable pin, leave the pin open (the module will be ON, except for the -49 option modules where leaving the pin open will cause the module to remain OFF). The Enable signal (VEnable) is referenced to ground. During a Logic High on the Enable pin, the module remains ON. During Logic-Low, the module is turned OFF.
MODULE
R1 7.5K
ON/OFF
R2 100k C1 1000p
ENABLE
GND
Figure 47. Remote On/Off Implementation. Components R2 and C1 are only present in the -49Z option module.
Overcurrent Protection
To provide protection in a fault (output overload) condition, the unit is equipped with internal current-limiting circuitry and can endure current limiting continuously. At the point of current-limit inception, the unit enters hiccup mode. The unit operates normally once the output current is brought back into its specified range. The typical average output current during hiccup is 10% of Io,max.
Overtemperature Protection
To provide protection in a fault condition, these modules are equipped with a thermal shutdown circuit. The unit will shut down if the overtemperature threshold of 130C is exceeded at the thermal reference point Tref. The thermal shutdown is not intended as a guarantee that the unit will survive temperatures beyond its rating. Once the unit goes into thermal shutdown it will then wait to cool before attempting to restart.
Input Undervoltage Lockout
At input voltages below the input undervoltage lockout limit, module operation is disabled. The module will begin to operate at an input voltage above the undervoltage lockout turn-on threshold.
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Data Sheet July 28, 2009
Naos Raptor 20A: Non Isolated Power Module: 4.5 - 14Vdc input; 0.59Vdc to 6Vdc Output; 20A output current
Table 2 provides Rtrim values required for some common output voltages.
Feature Descriptions (continued)
Power Good
The Naos Raptor 20A modules provide a Power Good Status signal that indicates whether or not the power module is functioning properly. PwGood is a power good signal implemented with an open-collector output to indicate that the output voltage is within the regulation limits of the power module. The PwGood signal will be de-asserted to a low state If any condition such as over-temperature, over-current, or over-voltage occurs which would result in the output voltage going out of range.
Table 2
VO, set (V) 0.59 1.0 1.2 1.5 1.8 2.5 3.3 5.0 6.0 Rtrim (K) Open 2.89 1.941 1.3 0.978 0.619 0.436 0.268 0.219
Output Voltage Programming
The output voltage of the Naos Raptor 20A module can be programmed to any voltage from 0.59Vdc to 6Vdc by connecting a resistor between the Trim+ and Trim- pins of the module. Certain restrictions apply on the output voltage set point depending on the input voltage. These are shown in the Output Voltage vs. Input Voltage Set Point Area plot in Fig. 48. The Upper Limit curve shows that for output voltages of 0.9V and lower, the input voltage must be lower than the maximum of 14V. The Lower Limit curve shows that for output voltages of 3.8V and higher, the input voltage needs to be larger than the minimum of 4.5V.
16 14
ON/OFF
By using a 0.5% tolerance trim resistor with a TC of 25ppm, a set point tolerance of 1.5% can be achieved as specified in the electrical specification. The POL Programming Tool available at www.lineagepower.com under the Design Tools section, helps determine the required trim resistor needed for a specific output voltage. Note: Vin 130% of Vout at the module output pin.
V IN(+)
V O(+)
Vout
Input Voltage (v)
12 10 8 6 4 2 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6
TRIM+ R trim
LOAD
GND
TRIM-
Figure 49. Circuit configuration for programming output voltage using an external resistor.
Output Voltage (V)
Figure 48. Output Voltage vs. Input Voltage Set Point Area plot showing limits where the output voltage can be set for different input voltages. Without an external resistor between Trim+ and Trim- pins, the output of the module will be 0.59Vdc. To calculate the value of the trim resistor, Rtrim for a desired output voltage, use the following equation:
Voltage Margining
Output voltage margining can be implemented in the Naos Raptor 20A modules by connecting a resistor, Rmargin-up, from the Trim+ pin to the Trim- pin for margining-up the output voltage and by connecting a resistor, Rmargin-down, from the Trim+ pin to the output pin for margining-down. Figure 50 shows the circuit configuration for output voltage margining. The POL Programming Tool, available at www.lineagepower.com under the Design Tools section, also calculates the values of Rmargin-up and Rmargin-down for a specific output voltage and % margin. Please consult your local Lineage Power technical representative for additional details.
Rtrim =
1.182 k (Vo - 0.591)
Rtrim is the external resistor in k Vo is the desired output voltage
LINEAGE POWER
14
Data Sheet July 28, 2009
Naos Raptor 20A: Non Isolated Power Module: 4.5 - 14Vdc input; 0.59Vdc to 6Vdc Output; 20A output current
Vo Rmargin-down
MODULE
Q2 Trim+ Rmargin-up Rtrim
for an input voltage of 12V. The value of RTUNE should never be lower than the values shown in Tables 3 and 4. Please contact your Lineage Power technical representative to obtain more details of this feature as well as for guidelines on how to select the right value of external R-C to tune the module for best transient performance and stable operation for other output capacitance values.
VOUT SENSE+
RTune
Q1 Trim-
MODULE
CTune
Figure 50. Circuit Configuration for margining Output voltage.
TRIM+
RTrim
TRIM-
Monotonic Start-up and Shutdown
The Naos Raptor 20A modules have monotonic start-up and shutdown behavior for any combination of rated input voltage, output current and operating temperature range.
Figure. 51. Circuit diagram showing connection of RTUME and CTUNE to tune the control loop of the module. Table 3. Recommended values of RTUNE and CTUNE to obtain transient deviation of 2% of Vout for a 10A step load with Vin=12V.
Vout 5V 3.3V 2.5V 1.8V 1.2V 0.69V 4x47F 2x47F 6x47F + + + 330F 7x330F 23x330F Cext Polymer 330F 2x330F 3x330F Polymer Polymer Polymer Polymer Polymer RTUNE CTUNE V 75 100nF 94mV 51 150nF 66mV 51 220nF 50mV 51 330nF 36mV 51 330nF 24mV 31 330nF 12mV
Tunable Loop
TM
The Naos Raptor 20A modules have a new feature that optimizes transient response of the module called TM Tunable Loop . External capacitors are usually added to improve output voltage transient response due to load current changes. Sensitive loads may also require additional output capacitance to reduce output ripple and noise. Adding external capacitance however affects the voltage control loop of the module, typically causing the loop to slow down with sluggish response. Larger values of external capacitance could also cause the module to become unstable. To use the additional external capacitors in an optimal TM manner, the Tunable Loop feature allows the loop to be tuned externally by connecting a series R-C between the SENSE and TRIM pins of the module, as shown in Fig. 51. This R-C allows the user to externally adjust the voltage loop feedback compensation of the module to match the filter network connected to the output of the module. Recommended values of RTUNE and CTUNE are given in Tables 3 and 4. Table 3 lists recommended values of RTUNE and CTUNE in order to meet 2% output voltage deviation limits for some common output voltages in the presence of a 5A to 10A step change (50% of full load), with an input voltage of 12V. Table 4 shows the recommended values of RTUNE and CTUNE for different values of ceramic output capacitors up to 1000uF, again
Table 4. General recommended values of of RTUNE and CTUNE for Vin=12V and various external ceramic capacitor combinations.
Cext 2x47F 4x47F 6x47F 10x47F 20x47F 30x47F RTUNE CTUNE 75 15nF 75 27nF 75 33nF 51 47nF 51 68nF 51 82nF
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15
Data Sheet July 28, 2009
Naos Raptor 20A: Non Isolated Power Module: 4.5 - 14Vdc input; 0.59Vdc to 6Vdc Output; 20A output current
Thermal Considerations
Power modules operate in a variety of thermal environments; however sufficient cooling should always be provided to help ensure reliable operation. Considerations include ambient temperature, airflow, module power dissipation, and the need for increased reliability. A reduction in the operating temperature of the module will result in an increase in reliability. The thermal data presented here is based on physical measurements taken in a wind tunnel. The test set-up is shown in Figure 52. The preferred airflow direction for the module is in Figure 53. Figure 53. Temperature measurement location Tref.
Wind Tunnel PWBs 50.8 [2.00] Power Module
Heat Transfer via Convection
Increased airflow over the module enhances the heat transfer via convection. Thermal derating curves showing the maximum output current that can be delivered at different local ambient temperatures (TA) for airflow conditions ranging from natural convection and up to 2m/s (400 ft./min) are shown in the Characteristics Curves section.
76.2 [3.0] 7.24 [0.285]
Probe Location for measuring airflow and ambient temperature
Post solder Cleaning and Drying Considerations
Post solder cleaning is usually the final circuit-board assembly process prior to electrical board testing. The result of inadequate cleaning and drying can affect both the reliability of a power module and the testability of the finished circuit-board assembly. For guidance on appropriate soldering, cleaning and drying procedures, refer to Board Mounted Power Modules: Soldering and Cleaning Application Note.
Air Flow
Figure 52. Thermal Test Set-up.
The thermal reference point, Tref used in the specifications is shown in Figure 53. For reliable o operation this temperatures should not exceed 122 C. The output power of the module should not exceed the rated power of the module (Vo,set x Io,max). Please refer to the Application Note "Thermal Characterization Process For Open-Frame BoardMounted Power Modules" for a detailed discussion of thermal aspects including maximum device temperatures.
Through-Hole Lead-Free Soldering Information
These RoHS-compliant through-hole products use the SAC (Sn/Ag/Cu) Pb-free solder and RoHS-compliant components. They are designed to be processed through single or dual wave soldering machines. The pins have an RoHS-compliant finish that is compatible with both Pb and Pb-free wave soldering processes. A maximum preheat rate of 3C/s is suggested. The wave preheat process should be such that the temperature of the power module board is kept below 210C. For Pb solder, the recommended pot temperature is 260C, while the Pb-free solder pot is 270C max. Not all RoHScompliant through-hole products can be processed with paste-through-hole Pb or Pb-free reflow process. If additional information is needed, please consult with your Lineage Power technical representative for more details.
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16
Data Sheet July 28, 2009
Naos Raptor 20A: Non Isolated Power Module: 4.5 - 14Vdc input; 0.59Vdc to 6Vdc Output; 20A output current
Mechanical Outline
Dimensions are in inches and (millimeters). Tolerances: x.x mm 0.5 mm (x.xx in. 0.02 in.) [unless otherwise indicated] x.xx mm 0.25 mm (x.xxx in 0.010 in.)
Front View
L = 3.30 0.5 [ 0.13 0.02]
Side View
Pin 1 2 3 4 5
Function Vout Trim + GND PwGood Enable
Pin 6 7 8 9 10
Function Vin Sense + Sense TRIM GND
Pin out
LINEAGE POWER
17
Data Sheet July 28, 2009
Naos Raptor 20A: Non Isolated Power Module: 4.5 - 14Vdc input; 0.59Vdc to 6Vdc Output; 20A output current
Recommended Pad Layout
Dimensions are in millimeters and (inches). Tolerances: x.x mm 0.2 mm (x.xx in. 0.02 in.) [unless otherwise indicated] x.xx mm 0.12 mm (x.xxx in 0.005 in.)
Pin 1 2 3 4 5
Function Vout Trim + GND PwGood Enable
Pin 6 7 8 9 10
Function Vin Sense + Sense TRIM GND
LINEAGE POWER
18
Data Sheet July 28, 2009
Naos Raptor 20A: Non Isolated Power Module: 4.5 - 14Vdc input; 0.59Vdc to 6Vdc Output; 20A output current
Ordering Information
Please contact your Lineage Power Sales Representative for pricing, availability and optional features. Table 5. Device Codes
Device Code Input Voltage Range Output Voltage Output Current On/Off Logic Connector Type Comcode
NSR020A0X43Z
4.5 - 13.8Vdc
0.59 - 6Vdc
20 A
Positive
SIP
CC109130911
Asia-Pacific Headquarters Tel: +65 6416 4283 Europe, Middle-East and Africa Headquarters Tel: +49 89 6089 286 India Headquarters Tel: +91 80 28411633
World Wide Headquarters Lineage Power Corporation 3000 Skyline Drive, Mesquite, TX 75149, USA +1-800-526-7819 (Outside U.S.A.: +1-972-284-2626) www.lineagepower.com e-mail: techsupport1@lineagepower.com
Lineage Power reserves the right to make changes to the product(s) or information contained herein without notice. No liability is assumed as a result of their use or application. No rights under any patent accompany the sale of any such product(s) or information. (c) 2008 Lineage Power Corporation, (Mesquite, Texas) All International Rights Reserved.
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Document No: DS06-127 ver. 1.07 PDF name: NSR020A0X_ds.pdf

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