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Data Sheet June 16, 2009
Austin LynxTM 24V:Non-isolated Power Modules: 18/20-30Vdc input; 3.0 to 6.0Vdc & 5.0 to 15.0Vdc Output; 30 & 50W
RoHS Compliant
Features
Compliant to RoHS EU Directive 2002/95/EC (-Z versions) Compliant to ROHS EU Directive 20002/95/EC with lead solder exemption (non-Z versions) Wide input voltage range AXB030: AXB050: AXB030: AXB050: AXB030: AXB050: 18 to 30Vdc 20 to 30Vdc 3Vdc to 6Vdc 5Vdc to 15Vdc 91% at 3.3V full load 94% at 12Vdc full load
Output voltage programmable via external resistor
High efficiency modules (VIN = 24Vdc)
Applications
Distributed power architectures Intermediate bus voltage applications Telecommunications equipment Wireless Base stations Industrial equipment LANs/WANs Enterprise Networks Latest generation IC's (DSP, FPGA, ASIC) and Microprocessor powered applications
Low output ripple and noise Monotonic start-up into pre-bias output Remote On/Off (Positive logic) Remote Sense Small size and low profile: 33.0 mm x 13.5 mm x 8.28 mm (1.30 in x 0.53 in x 0.326 in) Constant switching frequency Wide operating temperature range (-40C to 85C) Over current and Over temperature protection (nonlatching) UL* 60950-1Recognized, CSA C22.2 No. 60950-103 Certified, and VDE 0805:2001-12 (EN60950-1) Licensed ISO** 9001 and ISO 14001 certified manufacturing facilities
Description
The Austin LynxTM 24V series SMT power modules are non-isolated DC-DC converters in an industry standard package that can deliver up to 48W of output power with a full load efficiency of 94% at 12Vdc output voltage (VIN = 24Vdc). These modules operate over a wide input voltage range (VIN = 18/20 - 30Vdc) and provide a precisely regulated output voltage from 3 to 6Vdc (AXB030) and 5 to 15Vdc (AXB050), programmable via an external resistor. Standard features include remote On/Off, adjustable output voltage, remote sense, over current and over temperature protection.
* 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: DS05-032 ver.1.22 PDF name: lynx_24v_ds.pdf
Data Sheet June 16, 2009
Austin LynxTM 24V: Non-isolated Power Modules: 18/20- 30Vdc input; 3.0 - 6.0Vdc & 5.0 - 15.0Vdc Output; 30& 50W
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 TA -40 85 C Device All Symbol VIN Min -0.3 Max 36 Unit Vdc
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= 20V, VO= 12V, IO=IO, max) Input No Load Current (VIN = 24Vdc, Io = 0, module enabled) Input Stand-by Current (VIN = 24Vdc, module disabled) Inrush Transient Input Reflected Ripple Current, peak-to-peak (5Hz to 20MHz, 1H source impedance; VIN=20V to 30V, IO= IOmax ; See Figure 25) Input Ripple Rejection (120Hz) Vo = 3.3Vdc Vo = 12Vdc Vo = 3.3Vdc Vo = 12Vdc All IIN,No Load IIN,No Load IIN,stand-by IIN,stand-by It
2
Device AXB030 AXB050 All
Symbol VIN VIN IIN,max
Min 18.0 20.0
Typ 24.0 24.0
Max 30.0 30.0 3.5
Unit Vdc Vdc Adc
60 110 3 3 1
mAdc mAdc mA mA
2
As
All All 50
50
mAp-p dB
CAUTION: These power modules can be used in a wide variety of applications ranging from simple standalone operation to an integrated part of sophisticated power architectures. To preserve maximum flexibility, no internal fuse has been provided. Also, extensive safety testing has shown that no external fuse is required to protect the unit. However, it is still recommended that some type of current-limiting power source be used to protect the module and evaluated in the end-use equipment.
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Data Sheet June 16, 2009
Austin LynxTM 24V: Non-isolated Power Modules: 18/20- 30Vdc input; 3.0 - 6.0Vdc & 5.0 - 15.0Vdc Output; 30& 50W
Electrical Specifications (continued)
Parameter Output Voltage Set-point (VIN=VN, min, IO=IO, max, TA=25C) 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 Line (VIN=VIN, min to VIN, max) Load (IO=IO, min to IO, max) Temperature (Tref=TA, min to TA, max) Output Ripple and Noise on nominal output (VIN=VIN, nom and IO=IO, min to IO, max Cout =0.01F ceramic//10Ftantalum capacitors) Peak-to-Peak (5Hz to 20MHz bandwidth) Peak-to-Peak (5Hz to 20MHz bandwidth) External Capacitance ESR 1 m ESR 10 m ESR 1 m ESR 10 m Output Current (VIN = VIN, nom) Vo = 3.3Vdc Vo = 5.0Vdc Output Power (VIN = VIN, nom) Vo =Vo,,min to Vo,,max Output Short-Circuit Current (VO250mV) ( Hiccup Mode ) Efficiency VIN= VIN, nom, TA=25C IO=IO, max , VO= VO,set Switching Frequency (Fixed) AXB030 AXB050 AXB030 AXB050 AXB030 AXB050 VO,set = 3.3Vdc VO,set = 5.0Vdc VO,set = 12.0Vdc VO,set = 15.0Vdc All Io Io Po Po IO, s/c IO, s/c fsw 15 20 90 93 95 96 300 0 0 10 8.0 33 50 Adc Adc W W Adc Adc % % % % kHz AXB030 AXB030 AXB050 AXB050 CO, max CO, max CO, max CO, max 0 0 0 0 1,000 3,000 1,000 2,000 F F F F AXB030 AXB050 50 100 75 200 mVpk-pk mVpk-pk All All All 0.5 0.4 0.4 1 % VO, set % VO, set % VO, set AXB030 AXB050 VO VO 3.0 5.0 6.0 15.0 Vdc Vdc All VO, set -3% +3% % VO, set Device All Symbol VO, set Min -2.0 Typ VO, set Max +2.0 Unit % VO, set
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Data Sheet June 16, 2009
Austin LynxTM 24V: Non-isolated Power Modules: 18/20- 30Vdc input; 3.0 - 6.0Vdc & 5.0 - 15.0Vdc Output; 30& 50W
Electrical Specifications (continued)
Parameter Dynamic Load Response (dIO/dt=5A/s; VIN=VIN, nom TA=25C) Load Change from Io= 50% to 100% of IO,max; No external output capacitors Peak Deviation (Vo = 3.3Vdc) Peak Deviation (Vo = 12Vdc) Settling Time (VO<10% peak deviation) (dIO/dt=5A/s; VIN=VIN, nom; TA=25C) Load Change from IO= 100% to 50%of IO, max: No external output capacitors Peak Deviation (Vo = 3.3Vdc) Peak Deviation (Vo = 12Vdc) Settling Time (VO<10% peak deviation) (dIO/dt=5A/s; VIN=VIN, nom; TA=25C) Load Change from Io= 50% to 100% of Io,max; 2x150 F polymer capacitor Peak Deviation (Vo = 3.3Vdc) Peak Deviation (Vo = 12Vdc) Settling Time (VO<10% peak deviation) (dIO/dt=5A/s; VIN=VIN, nom; TA=25C) Load Change from Io= 100% to 50%of IO,max: 2x150 F polymer capacitor Peak Deviation (Vo = 3.3Vdc) Peak Deviation (Vo = 12Vdc) Settling Time (VO<10% peak deviation) AXB030 AXB050 All Vpk Vpk ts 130 130 50 mV mV s AXB030 AXB050 All Vpk Vpk ts 120 130 50 mV mV s AXB030 AXB050 All Vpk Vpk ts 300 220 50 mV mV s Device Symbol Min Typ Max Unit
AXB030 AXB050 All
Vpk Vpk ts
320 220 50
mV mV s
General Specifications
Parameter Calculated MTBF (VIN= VIN, nom, IO= 0.8IO, max, TA=40C) Telecordia SR 332 Issue 1: Method 1, case 3 Weight Device AXB050 Min Typ 8,035,510 5.70 (0.20) Max Unit Hours g (oz.)
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Data Sheet June 16, 2009
Austin LynxTM 24V: Non-isolated Power Modules: 18/20- 30Vdc input; 3.0 - 6.0Vdc & 5.0 - 15.0Vdc Output; 30& 50W
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 (On/Off is open collector/drain logic input; Signal referenced to GND - See feature description section) Device is with suffix "4" - Positive Logic Logic High (On/Off pin open - Module ON) Input High Current Input High Voltage Logic Low (Module OFF) Input Low Current Input Low Voltage Turn-On Delay and Rise Times (VIN=VIN, nom, IO=IO, max , VO to within 1% of steady state) Case 1: On/Off 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 On/Off input is enabled (delay from instant at which Von/Off 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 IO = IO, max; VIN, min - VIN, max, TA = 25 C Remote Sense Range Over temperature Protection (See Thermal Consideration section) Input Undervoltage Lockout Turn-on Threshold Turn-off Threshold AXB030 AXB050 AXB030 AXB050 15 17 17 19 Vdc Vdc Vdc Vdc All Tref 125 0.5 135 V C
o
Device
Symbol
Min
Typ
Max
Unit
All All All All
IIH VIH IIL VIL VIN-2.5V -0.3

10 30 1 1.2
A V mA V
All
Tdelay
2
4
8
msec
All
Tdelay
2
4
8
msec
All
Trise
2
5
9 3.0
msec % VO, set
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Data Sheet June 16, 2009
Austin LynxTM 24V: Non-isolated Power Modules: 18/20- 30Vdc input; 3.0 - 6.0Vdc & 5.0 - 15.0Vdc Output; 30& 50W
Characteristic Curves
The following figures provide typical characteristics for the AXB030X module at 3.3V, 10A and 25 C.
95
o
12
2m/s (400LFM)
OUTPUT CURRENT, Io (A)
90
10 8
NC
EFFICIENCY, ()
85 Vin=24V 80 Vin=30V 75
Vin=20V
6 4 2 0 0 20
0.5m/s (100LFM) 1m/s (200LFM)
70 0 2 4 6 8 10
40
60
O
80
100
OUTPUT CURRENT, IO (A)
AMBIENT TEMPERATURE, TA C
Figure 1. Converter Efficiency versus Output Current.
Figure 4. Derating Output Current versus Local Ambient Temperature and Airflow.
OUTPUT VOLTAGE On/Off VOLTAGE
OUTPUT VOLTAGE
VO (V) (20mV/div)
VOn/off (V) (20V/div)
VO (V) (1V/div)
TIME, t (1s/div))
TIME, t (1ms/div)
Figure 2. Typical output ripple and noise (VIN = VIN,NOM, Io = Io,max).
OUTPUT VOLTAGEIO VO (V) (200mV/div)
Figure 5. Typical Start-up Using Remote On/Off (VIN = 20V, Io = Io,max).
OUTPUT VOLTAGE INPUT VOLTAGE
OUTPUT CURRENT, (A) (5A/div)
VIN (V) (20V/div)
VO (V) (1V/div)
TIME, t (5s /div)
TIME, t (1ms/div)
Figure 3. Transient Response to Dynamic Load Change from 50% to 100% of full load with di/dt of 5A/s.
Figure 6. Typical Start-up Using Input Voltage (VIN = 20V, Io = Io,max).
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Data Sheet June 16, 2009
Austin LynxTM 24V: Non-isolated Power Modules: 18/20- 30Vdc input; 3.0 - 6.0Vdc & 5.0 - 15.0Vdc Output; 30& 50W
Characteristic Curves (continued)
The following figures provide typical characteristics for the AXB050X module at 5V, 8A and 25oC.
100 95
9 8
OUTPUT CURRENT, Io (A)
7 6 5 4 3 2 1 0 20 30 40
NC
90
EFFICIENCY, ()
100 lfm (0.5m/s) 200 lfm (1.0m/s)
85 80 75 70 0 2 Vin=30V
Vin=24V
Vin=20V
4
6
8
50
60
70
80
O
90
100
OUTPUT CURRENT, IO (A)
AMBIENT TEMPERATURE, TA C
Figure 7. Converter Efficiency versus Output Current.
Figure 10. Derating Output Current versus Local Ambient Temperature and Airflow (VIN = VIN,NOM).
OUTPUT VOLTAGE On/Off VOLTAGE
OUTPUT VOLTAGE
VO (V) (50mV/div)
VIN (V) (10V/div)
VO (V) (2V/div)
TIME, t (1s/div)
TIME, t (2.5ms/div)
Figure 8. Typical output ripple and noise (VIN = VIN,NOM, Io = Io,max).
OUTPUT CURRENT OUTPUT VOLTAGE IO (A) (5A/div) VO (V) (200mV/div)
Figure 11. Typical Start-up Using Remote On/Off (VIN = 24V, Io = Io,max).
OUTPUT VOLTAGE INPUT VOLTAGE
VIN (V) (10V/div)
VO (V) (2V/div)
TIME, t (5s/div)
TIME, t (2.5ms/div)
Figure 9. Transient Response to Dynamic Load change from 50% to 100% of full load with di/dt of 5A/s.
Figure 12. Typical Start-up Using Input Voltage (VIN = 20V, Io = Io,max).
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Data Sheet June 16, 2009
Austin LynxTM 24V: Non-isolated Power Modules: 18/20- 30Vdc input; 3.0 - 6.0Vdc & 5.0 - 15.0Vdc Output; 30& 50W
Characteristic Curves (continued)
The following figures provide typical characteristics for the AXB050X module at 12V, 4A and 25oC.
100
5
OUTPUT CURRENT, Io (A)
95
4 3 2 1 0 20 30 40 50 60 70 80 90 O AMBIENT TEMPERATURE, TA C 100 NC 100 lfm (0.5m/s)
EFFICIENCY, (%)
90 Vin=20V 85 80 75 70 0 Vin=30V Vin=24V
OUTPUT CURRENT, IO (A)
1
2
3
4
Figure 13. Converter Efficiency versus Output Current.
Figure 16. Derating Output Current versus Local Ambient Temperature and Airflow.
On/Off VOLTAGE OUTPUT VOLTAGE VOn/off (V) (10V/div) VO (V) (5V/div)
OUTPUT VOLTAGE
VO (V) (10mV/div)
TIME, t (1s/div)
TIME, t (2ms/div)
Figure 14. Typical output ripple and noise (VIN = VIN,NOM, Io = Io,max).
OUTPUT CURRENT OUTPUT VOLTAGE IO (A) (2A/div) VO (V) (100mV/div)
Figure 17. Typical Start-up Using Remote On/Off (VIN = VIN,NOM, Io = Io,max).
OUTPUTVOLTAGE VO (V) (5V/div) INPUT VOLTAGE VIN (V) (20V/div)
TIME, t (10s /div)
TIME, t (2ms/div)
Figure 15. Transient Response to Dynamic Load change from 50% to 100% of full load with di/dt of 5A/s.
Figure 18. Typical Start-up Using Input Voltage (VIN = 20V, Io = Io,max).
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Data Sheet June 16, 2009
Austin LynxTM 24V: Non-isolated Power Modules: 18/20- 30Vdc input; 3.0 - 6.0Vdc & 5.0 - 15.0Vdc Output; 30& 50W
Characteristic Curves (continued)
The following figures provide typical characteristics for the AXB050X module at 15V, 3A and 25oC.
100 95
4
OUTPUT CURRENT, Io (A)
3 NC 2
EFFICIENCY, (%)
90 85 80 75 70 0 0.5 1 1.5 2 Vin=24V
Vin=20V
Vin=30V
1
0 20 30 40 50 60 70 80 90 100
2.5
3
OUTPUT CURRENT, IO (A)
AMBIENT TEMPERATURE, TA C
O
Figure 19. Converter Efficiency versus Output Current.
Figure 22. Derating Output Current versus Local Ambient Temperature and Airflow.
On/Off VOLTAGE OUTPUT VOLTAGE VOn/off (V) (10V/div) VO (V) (5V/div)
OUTPUT VOLTAGE
VO (V) (20mV/div)
TIME, t (1s/div)
TIME, t (2ms/div)
Figure 20. Typical output ripple and noise (VIN = VIN,NOM, Io = Io,max).
Figure 23. Typical Start-up Using Remote On/Off (VIN = VIN,NOM, Io = Io,max).
OUTPUT CURRENT, OUTPUT VOLTAGE IO (A) (1A/div) VO (V) (50mV/div)
INPUT VOLTAGE VIN (V) (20V/div)
OUTPUT VOLTAGE VO (V) (5V/div)
TIME, t (10s /div)
TIME, t (2.5ms/div)
Figure 21. Transient Response to Dynamic Load change from 50% to 100% of full load with di/dt of 5A/s.
Figure 24. Typical Start-up Using Input Voltage (VIN = 20V, Io = Io,max).
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Data Sheet June 16, 2009
Austin LynxTM 24V: Non-isolated Power Modules: 18/20- 30Vdc input; 3.0 - 6.0Vdc & 5.0 - 15.0Vdc Output; 30& 50W
Test Configurations
TO OSCILLOSCOPE LTEST 1H VIN(+) CURRENT PROBE
Design Considerations
Input Filtering
The Austin Lynx 24V SMT 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.
TM
BATTERY
CS
220F
CIN Min 150F
E.S.R.<0.1 @ 20C 100kHz
COM
Output Filtering
The Austin LynxTM 24V SMT module is designed for low output ripple voltage and will meet the maximum output ripple specification with 1 F ceramic and 10 F tantalum capacitors at the output of the module. 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 polymer and ceramic capacitors 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.
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.
Figure 25. Input Reflected Ripple Current Test Setup.
COPPER STRIP VO (+) 1uF COM . 10uF SCOPE RESISTIVE LOAD
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.
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, CSA C22.2 No. 60950-00, EN60950 (VDE 0850) (IEC60950, 3rd edition) 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.
Figure 26. Output Ripple and Noise Test Setup.
Rdistribution
Rcontact VIN(+) VO
Rcontact
Rdistribution
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.
Figure 27. Output Voltage and Efficiency Test Setup.
VO. IO Efficiency = VIN. IIN x 100 %
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Data Sheet June 16, 2009
Austin LynxTM 24V: Non-isolated Power Modules: 18/20- 30Vdc input; 3.0 - 6.0Vdc & 5.0 - 15.0Vdc Output; 30& 50W
Feature Description
Remote On/Off
The Austin Lynx 24V SMT power modules feature an On/Off pin for remote On/Off operation. Positive Logic On/Off signal, device code suffix "4", turns the module ON during a logic High on the On/Off pin and turns the module OFF during a logic Low. For positive logic modules, the circuit configuration for using the On/Off pin is shown in Figure 28. The On/Off pin is an open collector/drain logic input signal (Von/Off) that is referenced to ground. During a logic-high (On/Off pin is pulled high internal to the module) when the transistor Q1 is in the Off state, the power module is ON. Maximum allowable leakage current of the transistor when Von/off = VIN,max is 10A. Applying a logic-low when the transistor Q1 is turned-On, the power module is OFF. During this state VOn/Off must be less than 1.2V. When not using positive logic On/off pin, leave the pin unconnected or tie to VIN.
VIN+ R2 ON/OFF VON/OFF + R1 Q2
TM
R distrib u tio n R c o nta c t
V IN (+ ) VO S e n se R LO AD
R c o n ta c t
R d istribu tio n
R distrib u tio n
R c o nta c t
COM CO M
R c o n ta c t
R d istribu tio n
Figure 29. Effective Circuit Configuration for Remote Sense operation.
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 average output current during hiccup is 20% IO, max.
MODULE
Input Undervoltage Lockout
At input voltages below the input undervoltage lockout limit, the module operation is disabled. The module will begin to operate at an input voltage above the undervoltage lockout turn-on threshold.
I ON/OFF
PWM Enable R3 Q1 Q3 R4 CSS
Overtemperature Protection
To provide protection in a fault condition, the unit is equipped with a thermal shutdown circuit. The unit will o shutdown if the overtemperature threshold of 130 C 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.
GND
_
Figure 28. Remote On/Off Implementation circuit.
Remote Sense
The Austin Lynx 24V power modules have a Remote Sense feature to minimize the effects of distribution losses by regulating the voltage at the Remote Sense pin (See Figure 29). The voltage between the Sense pin and Vo pin must not exceed 0.5V. The amount of power delivered by the module is defined as the output voltage multiplied by the output current (Vo x Io). When using Remote Sense, the output voltage of the module can increase which increases the power output of the module. Make sure that the maximum output power of the module remains at or below the maximum rated power. When the Remote Sense feature is not being used, connect the Remote Sense pin to the output of the module.
Output Voltage Programming
The output voltage of the Austin Lynx 24V can be programmed to any voltage in the specified ranges by connecting a resistor (shown as Rtrim in Figure 30) between the Trim and GND pins of the module. Without an external resistor between the Trim and GND pins, the output of the module will be at the low-end of the specified range. To calculate the value of the trim resistor, Rtrim for a desired output voltage, use the following equations: For the AX030A0X modules,
10500 Rtrim = - 3480 Vo - 3.018
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Data Sheet June 16, 2009
Austin LynxTM 24V: Non-isolated Power Modules: 18/20- 30Vdc input; 3.0 - 6.0Vdc & 5.0 - 15.0Vdc Output; 30& 50W
Vo Rmargin-down Austin Lynx or Lynx II Series Q2 Trim Rmargin-up Rtrim
Feature Descriptions (continued)
Output Voltage Programming (continued)
For the AX050A0X modules,
10500 Rtrim = - 1000 Vo - 5.021
where, Rtrim is the external resistor in and
Vo is the desired output voltage
V IN(+)
V O(+)
Q1 GND
ON/OFF
TRIM
LOAD
Rtrim
GND
Figure 31. Circuit Configuration for margining the output voltage.
Figure 30. Circuit configuration to program output voltage using an external resistor. By using a 0.5% tolerance trim resistor with a TC of 100ppm, a set point tolerance of 2% can be achieved as specified in the electrical specifications. The POL Programming Tool, available at www.lineagepower.com under the Design Tools section, helps determine the required external trim resistor needed for a specific output voltage.
Voltage Margining
Output voltage margining can be implemented in the Austin Lynx 24V modules by connecting a resistor, Rmargin-up, from the Trim pin to the ground pin for margining-up the output voltage and by connecting a resistor, Rmargin-down, from the Trim pin to output pin for margining-down. Figure 31 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.
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Data Sheet June 16, 2009
Austin LynxTM 24V: Non-isolated Power Modules: 18/20- 30Vdc input; 3.0 - 6.0Vdc & 5.0 - 15.0Vdc Output; 30& 50W
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 32. Note that the airflow is parallel to the long axis of the module as shown in figure 32. The derating data applies to airflow in either direction of the module's long axis.
Figure 33. Tref Temperature measurement location.
Wind Tunnel PWBs
25.4_ (1.0)
Power Module
76.2_ (3.0)
x
The thermal reference point, Tref used in the specifications is shown in Figure 33. For reliable operation this temperature should not exceed 125oC. 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.
12.7_ (0.50)
Probe Location for measuring airflow and ambient temperature
Air flow
Figure 32. Thermal Test Set-up.
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Data Sheet June 16, 2009
Austin LynxTM 24V: Non-isolated Power Modules: 18/20- 30Vdc input; 3.0 - 6.0Vdc & 5.0 - 15.0Vdc Output; 30& 50W
Mechanical Outline
Dimensions are in millimeters and (inches). 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.)
Non Co-planarity (max): 0.15 (0.006)
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Data Sheet June 16, 2009
Austin LynxTM 24V: Non-isolated Power Modules: 18/20- 30Vdc input; 3.0 - 6.0Vdc & 5.0 - 15.0Vdc Output; 30& 50W
Recommended Pad Layout
Dimensions are in millimeters and (inches). 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.)
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Data Sheet June 16, 2009
Austin LynxTM 24V: Non-isolated Power Modules: 18/20- 30Vdc input; 3.0 - 6.0Vdc & 5.0 - 15.0Vdc Output; 30& 50W
Packaging Details
The Austin LynxTM 24V SMT versions are supplied in tape & reel as standard. Modules are shipped in quantities of 250 modules per reel.
Tape Dimensions
Reel Dimensions
Outside diameter: Inside diameter: Tape Width: 330.2 mm (13.00) 177.8 mm (7.00") 44.0 mm (1.73")
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Data Sheet June 16, 2009
Austin LynxTM 24V: Non-isolated Power Modules: 18/20- 30Vdc input; 3.0 - 6.0Vdc & 5.0 - 15.0Vdc Output; 30& 50W
Surface Mount Information
Pick and Place
The Austin Lynx 24V SMT modules use open frame construction and are designed for fully automated assembly process. The modules are fitted with a label designed to provide a large surface area for pick and place operation. The label meets all the requirements for surface mount processing, as well as safety standards, and is able to withstand reflow temperatures of up to 300oC. The label also carries product information such as product code, serial number and location of manufacture.
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following instructions must be observed when soldering these units. Failure to observe these instructions may result in the failure of or cause damage to the modules, and can adversely affect long-term reliability. In a conventional Tin/Lead (Sn/Pb) solder process peak reflow temperatures are limited to less than o o 235 C. Typically, the eutectic solder melts at 183 C, wets the land, and subsequently wicks the device connection. Sufficient time must be allowed to fuse the plating on the connection to ensure a reliable solder joint. There are several types of SMT reflow technologies currently used in the industry. These surface mount power modules can be reliably soldered using natural forced convection, IR (radiant infrared), or a combination of convection/IR. For reliable soldering the solder reflow profile should be established by accurately measuring the modules CP connector temperatures.
300
P eak Temp 235oC
250
REFLOW TEMP (C)
200
Heat zo ne max 4oCs -1
Co o ling zo ne 1 oCs -1 -4
150
Figure 34. Pick and place Location.
100
So ak zo ne 30-240s P reheat zo ne max 4oCs -1
Nozzle Recommendations
The module weight has been kept to a minimum by using open frame construction. Even so, these modules have a relatively large mass when compared to conventional SMT components. Variables such as nozzle size, tip style, vacuum pressure and placement speed should be considered to optimize this process. The minimum recommended nozzle diameter for reliable operation is 6mm. The maximum nozzle outer diameter, which will safely fit within the allowable component spacing, is 9 mm. Oblong or oval nozzles up to 11 x 9 mm may also be used within the space available. For further information please contact your local Lineage Power technical representative.
Tlim above 205oC
50
0
REFLOW TIME (S)
Figure 35. Reflow Profile for Tin/Lead (Sn/Pb) process.
240 235
MAX TEMP SOLDER (C)
230 225 220 215 210 205 200 0 10 20 30 40 50 60
Tin Lead Soldering
The Austin Lynx 24V SMT power modules are lead free modules and can be soldered either in a lead-free solder process or in a conventional Tin/Lead (Sn/Pb) process. It is recommended that the customer review data sheets in order to customize the solder reflow profile for each application board assembly. The
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Figure 36. Time Limit Curve Above 205oC for Tin/Lead (Sn/Pb) process.
LINEAGE POWER
17
Data Sheet June 16, 2009
Austin LynxTM 24V: Non-isolated Power Modules: 18/20- 30Vdc input; 3.0 - 6.0Vdc & 5.0 - 15.0Vdc Output; 30& 50W
Surface Mount Information (continued)
Lead Free Soldering
The -Z version Austin Lynx 24V SMT modules are lead-free (Pb-free) and RoHS compliant and are both forward and backward compatible in a Pb-free and a SnPb soldering process. Failure to observe the instructions below may result in the failure of or cause damage to the modules and can adversely affect long-term reliability. Pb-free Reflow Profile Power Systems will comply with J-STD-020 Rev. C (Moisture/Reflow Sensitivity Classification for Nonhermetic Solid State Surface Mount Devices) for both Pb-free solder profiles and MSL classification procedures. This standard provides a recommended forced-air-convection reflow profile based on the volume and thickness of the package (table 4-2). The suggested Pb-free solder paste is Sn/Ag/Cu (SAC). The recommended linear reflow profile using Sn/Ag/Cu solder is shown in Figure. 37.
300 Per J-STD-020 Rev. C Peak Temp 260C 250 Cooling Zone
Reflow Temp (C)
200 * Min. Time Above 235C 15 Seconds Heating Zone 1C/Second *Time Above 217C 60 Seconds
150
100
50
0
Reflow Time (Seconds)
Figure 37. Recommended linear reflow profile using Sn/Ag/Cu solder.
MSL Rating
The Austin Lynx 24V SMT modules have an MSL rating of 2.
Storage and Handling
The recommended storage environment and handling procedures for moisture-sensitive surface mount packages is detailed in J-STD-033 Rev. A (Handling, Packing, Shipping and Use of Moisture/Reflow Sensitive Surface Mount Devices). Moisture barrier bags (MBB) with desiccant are required for MSL ratings of 2 or greater. These sealed packages should not be broken until time of use. Once the original package is broken, the floor life of the product at conditions of 30C and 60% relative humidity varies according to the MSL rating (see J-STD-033A). The shelf life for dry packed SMT packages will be a minimum of 12 months from the bag seal date, when stored at the following conditions: < 40 C, < 90% relative humidity.
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 (AN04-001).
LINEAGE POWER
18
Data Sheet June 16, 2009
Austin LynxTM 24V: Non-isolated Power Modules: 18/20- 30Vdc input; 3.0 - 6.0Vdc & 5.0 - 15.0Vdc Output; 30& 50W
Ordering Information
Please contact your Lineage Power Sales Representative for pricing, availability and optional features. Table 1. Device Codes
Device Code AXB030X43-SR AXB030X43-SRZ AXB050X43-SR AXB050X43-SRZ Input Voltage Range 18 - 30Vdc 18 - 30Vdc 20 - 30Vdc 20 - 30Vdc Output Voltage 3.0 - 6.0Vdc 3.0 - 6.0Vdc 5.0 - 15.0Vdc 5.0 - 15.0Vdc Output Power 30W 30W 50W 50W On/Off Logic Positive Positive Positive Positive Connector Type SMT SMT SMT SMT Comcodes 108992673 CC109106738 108992681 CC109104857
-Z refers to RoHS-compliant codes
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.
LINEAGE POWER
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Document No: DS05-032 ver.1.22 PDF name: lynx_24v_ds.pdf

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