LINEAGEPOWER ATH010A0X43-SR

Data Sheet
August 28, 2009
Austin LynxTM II SMT Non-isolated Power Modules:
2.4Vdc –5.5Vdc input; 0.75Vdc to 3.63Vdc Output;10A Output Current
RoHS Compliant
EZ-SEQUENCETM
Features
ƒ
Compliant to RoHS EU Directive 2002/95/EC (-Z
versions)
ƒ
Compliant to ROHS EU Directive 2002/95/EC with
lead solder exemption (non-Z versions)
ƒ
Flexible output voltage sequencing EZTM
SEQUENCE
ƒ
Delivers up to 10A output current
ƒ
High efficiency – 95% at 3.3V full load (VIN = 5.0V)
ƒ
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)
Applications
ƒ
Distributed power architectures
ƒ
Intermediate bus voltage applications
ƒ
Telecommunications equipment
ƒ
Servers and storage applications
ƒ
ƒ
ƒ
Low output ripple and noise
High Reliability:
o
Calculated MTBF = 15.7M hours at 25 C Full-load
ƒ
Constant switching frequency (300 kHz)
ƒ
Output voltage programmable from 0.75 Vdc to
3.63Vdc via external resistor
Networking equipment
ƒ
Line Regulation: 0.3% (typical)
ƒ
Enterprise Networks
ƒ
Load Regulation: 0.4% (typical)
ƒ
Latest generation IC’s (DSP, FPGA, ASIC) and
Microprocessor powered applications
ƒ
Temperature Regulation: 0.4 % (typical)
ƒ
Remote On/Off
ƒ
Remote sense
ƒ
Output overcurrent protection (non-latching)
ƒ
Wide operating temperature range (-40°C to 85°C)
ƒ
UL* 60950-1Recognized, CSA† C22.2 No. 60950-103 Certified, and VDE‡ 0805:2001-12 (EN60950-1)
Licensed
ƒ
ISO** 9001 and ISO 14001 certified manufacturing
facilities
Description
TM
Austin Lynx II SMT (surface mount technology) power modules are non-isolated DC-DC converters that can
deliver up to 10A of output current with full load efficiency of 95% at 3.3V output. These modules provide a
precisely regulated output voltage programmable via an external resistor from 0.75Vdc to 3.63Vdc over a wide
range of input voltage (VIN = 2.4 – 5.5Vdc). The Austin LynxTM II series has a sequencing feature, EZSEQUENCETM that enable designers to implement various types of output voltage sequencing when powering
multiple voltages on a board.
* 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: DS03-105 ver. 1.03
PDF name: lynx_II_smt_ds.pdf
Data Sheet
August 28, 2009
Austin LynxTM II SMT Non-isolated Power Modules:
2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 10A 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
Device
Symbol
Min
Max
Unit
All
VIN
-0.3
5.8
Vdc
Sequencing voltage
All
Vseq
-0.3
VIN,max
Vdc
Operating Ambient Temperature
All
TA
-40
85
°C
All
Tstg
-55
125
°C
Input Voltage
Continuous
(see Thermal Considerations section)
Storage Temperature
Electrical Specifications
Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature
conditions.
Parameter
Device
Symbol
Min
Typ
Max
Unit
2.4
⎯
5.5
Vdc
10
Adc
Operating Input Voltage
Vo ≤ VIN - 0.5
VIN
Maximum Input Current
All
IIN,max
Vo = 0.75Vdc
IIN,No load
25
mA
Vo = 3.3Vdc
IIN,No load
30
mA
All
IIN,stand-by
1.5
mA
Inrush Transient
All
It
Input Reflected Ripple Current, peak-to-peak
(5Hz to 20MHz, 1μH source impedance; VIN, min to
VIN, max, IO= IOmax ; See Test Configurations)
All
100
mAp-p
Input Ripple Rejection (120Hz)
All
30
dB
(VIN=2.4V to 5.5V, IO=IO, max )
Input No Load Current
(VIN = 5.0Vdc, IO = 0, module enabled)
Input Stand-by Current
(VIN = 5.0Vdc, module disabled)
2
0.1
2
As
CAUTION: This power module is not internally fused. An input line fuse must always be used.
This power module can be used in a wide variety of applications, ranging from simple standalone operation to being
part of a complex power architecture. To preserve maximum flexibility, internal fusing is not included, however, to
achieve maximum safety and system protection, always use an input line fuse. The safety agencies require a 15A,
time-delay fuse (see Safety Considerations section). Based on the information provided in this data sheet on inrush
energy and maximum dc input current, the same type of fuse with a lower rating can be used. Refer to the fuse
manufacturer’s data sheet for further information.
LINEAGE POWER
2
Data Sheet
August 28, 2009
Austin LynxTM II SMT Non-isolated Power Modules:
2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 10A output current
Electrical Specifications (continued)
Parameter
Output Voltage Set-point
Device
Symbol
Min
Typ
Max
Unit
All
VO, set
-2.0
VO, set
+2.0
% VO, set
All
VO, set
-3%
⎯
+3%
% VO, set
All
VO
0.7525
3.63
Vdc
(VIN=IN, min, IO=IO, max, TA=25°C)
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)
All
⎯
0.3
⎯
% VO, set
Load (IO=IO, min to IO, max)
All
⎯
0.4
⎯
% VO, set
Temperature (Tref=TA, min to TA, max)
All
⎯
0.4
⎯
% VO, set
RMS (5Hz to 20MHz bandwidth)
All
⎯
8
15
mVrms
Peak-to-Peak (5Hz to 20MHz bandwidth)
All
⎯
25
50
mVpk-pk
μF
Output Ripple and Noise on nominal output
(VIN=VIN, nom and IO=IO, min to IO, max
Cout = 1μF ceramic//10μFtantalum capacitors)
External Capacitance
ESR ≥ 1 mΩ
All
CO, max
⎯
⎯
1000
⎯
5000
μF
10
Adc
All
CO, max
⎯
Output Current
All
Io
0
Output Current Limit Inception (Hiccup Mode )
All
IO, lim
⎯
200
⎯
% Io
All
IO, s/c
⎯
3.0
⎯
Adc
VO,set = 0.75Vdc
η
81.5
%
VIN= VIN, nom, TA=25°C
VO, set = 1.2Vdc
η
87.0
%
IO=IO, max , VO= VO,set
VO,set = 1.5Vdc
η
89.0
%
VO,set = 1.8Vdc
η
90.0
%
VO,set = 2.5Vdc
η
93.0
%
ESR ≥ 10 mΩ
(VO= 90% of VO, set)
Output Short-Circuit Current
(VO≤250mV) ( Hiccup Mode )
Efficiency
Switching Frequency
VO,set = 3.3Vdc
η
All
fsw
⎯
94.0
300
⎯
kHz
%
All
Vpk
⎯
250
⎯
mV
Dynamic Load Response
(dIo/dt=2.5A/μs; VIN = VIN, nom; TA=25°C)
Load Change from Io= 50% to 100% of
Io,max; 1μF ceramic// 10 μF tantalum
Peak Deviation
Settling Time (Vo<10% peak deviation)
All
ts
⎯
50
⎯
μs
(dIo/dt=2.5A/μs; VIN = VIN, nom; TA=25°C)
Load Change from Io= 100% to 50%of Io,max:
1μF ceramic// 10 μF tantalum
All
Vpk
⎯
250
⎯
mV
All
ts
⎯
50
⎯
μs
Peak Deviation
Settling Time (Vo<10% peak deviation)
LINEAGE POWER
3
Data Sheet
August 28, 2009
Austin LynxTM II SMT Non-isolated Power Modules:
2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 10A output current
Electrical Specifications (continued)
Parameter
Device
Symbol
Min
Typ
Max
Unit
All
Vpk
⎯
60
⎯
mV
Dynamic Load Response
(dIo/dt=2.5A/μs; V VIN = VIN, nom; TA=25°C)
Load Change from Io= 50% to 100% of Io,max;
Co = 2x150 μF polymer capacitors
Peak Deviation
Settling Time (Vo<10% peak deviation)
All
ts
⎯
100
⎯
μs
(dIo/dt=2.5A/μs; VIN = VIN, nom; TA=25°C)
Load Change from Io= 100% to 50%of Io,max:
Co = 2x150 μF polymer capacitors
Peak Deviation
All
Vpk
⎯
60
⎯
mV
Settling Time (Vo<10% peak deviation)
All
ts
⎯
100
⎯
μs
General Specifications
Parameter
Min
Calculated MTBF (IO=IO, max, TA=25°C)
Weight
LINEAGE POWER
Typ
Max
15,726,300
⎯
2.8 (0.1)
Unit
Hours
⎯
g (oz.)
4
Austin LynxTM II SMT Non-isolated Power Modules:
2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 10A output current
Data Sheet
August 28, 2009
Feature Specifications
Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature
conditions. See Feature Descriptions for additional information.
Parameter
Device
Symbol
Min
Typ
Max
Unit
On/Off Signal interface
Device code with Suffix “4” – Positive logic
(On/Off is open collector/drain logic input;
Signal referenced to GND - See feature description
section)
Input High Voltage (Module ON)
All
VIH
―
―
VIN, max
V
Input High Current
All
IIH
―
―
10
μA
Input Low Voltage (Module OFF)
All
VIL
-0.2
―
0.3
V
Input Low Current
All
IIL
―
0.2
1
mA
Input High Voltage (Module OFF)
All
VIH
1.5
Input High Current
All
IIH
Input Low Voltage (Module ON)
All
VIL
Input low Current
All
IIL
Case 1: On/Off input is set to Logic Low (Module
ON) and then input power is applied (delay from
instant at which VIN =VIN, min until Vo=10% of Vo,set)
All
Tdelay
Case 2: Input power is applied for at least one second
and then the On/Off input is set to logic Low (delay from
instant at which Von/Off=0.3V until Vo=10% of Vo, set)
All
Output voltage Rise time (time for Vo to rise from 10%
of Vo,set to 90% of Vo, set)
Sequencing Delay time
All
Delay from VIN, min to application of voltage on SEQ pin
Device Code with no suffix – Negative Logic
(On/OFF pin is open collector/drain logic input with
external pull-up resistor; signal referenced to GND)
-0.2
―
VIN,max
Vdc
0.2
1
mA
―
0.3
Vdc
―
10
μA
―
3.9
―
msec
Tdelay
―
3.9
―
msec
Trise
―
4.2
8.5
msec
All
TsEQ-delay
10
(Power-Up: 2V/ms)
All
(Power-Down: 1V/ms)
All
|VSEQ –Vo
|
|VSEQ –Vo
|
Turn-On Delay and Rise Times
o
(IO=IO, max , VIN = VIN, nom, TA = 25 C, )
Tracking Accuracy
(VIN, min to VIN, max; IO, min to IO, max VSEQ < Vo)
msec
100
200
mV
200
400
mV
―
1
% VO, set
―
―
0.5
V
⎯
125
⎯
°C
Output voltage overshoot – Startup
o
IO= IO, max; VIN = 3.0 to 5.5Vdc, TA = 25 C
Remote Sense Range
Overtemperature Protection
All
Tref
(See Thermal Consideration section)
Input Undervoltage Lockout
Turn-on Threshold
All
2.2
V
Turn-off Threshold
All
2.0
V
LINEAGE POWER
5
Austin LynxTM II SMT Non-isolated Power Modules:
2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 10A output current
Data Sheet
August 28, 2009
Characteristic Curves
The following figures provide typical characteristics for the Austin LynxTM II SMT modules at 25ºC.
90
96
VIN = 3.0V
93
87
EFFICIENCY, (η)
EFFICIENCY, (η)
90
84
81
78
VIN = 5.0V
75
VIN = 5.5V
72
87
84
81
VIN = 3.0V
78
VIN = 5.0V
75
VIN = 5.5V
72
0
2.5
5
7.5
10
0
OUTPUT CURRENT, IO (A)
2.5
5
7.5
10
OUTPUT CURRENT, IO (A)
Figure 1. Converter Efficiency versus Output Current
(Vout = 0.75Vdc).
Figure 4. Converter Efficiency versus Output Current
(Vout = 1.8Vdc).
93
100
97
90
94
EFFICIENCY, (η)
EFFICIENCY, (η)
87
84
81
VIN = 3.0V
78
VIN = 5.0V
75
85
82
VIN = 3.0V
79
VIN = 5.0V
76
VIN = 5.5V
72
VIN = 5.5V
73
0
2.5
5
7.5
10
OUTPUT CURRENT, IO (A)
Figure 2. Converter Efficiency versus Output Current
(Vout = 1.2Vdc).
0
2.5
5
7.5
10
OUTPUT CURRENT, IO (A)
Figure 5. Converter Efficiency versus Output Current
(Vout = 2.5Vdc).
100
94
91
97
88
94
EFFICIENCY, (η)
EFFICIENCY, (η)
91
88
85
82
79
VIN = 3.0V
76
VIN = 5.0V
73
5
7.5
OUTPUT CURRENT, IO (A)
Figure3. Converter Efficiency versus Output Current
(Vout = 1.5Vdc).
LINEAGE POWER
VIN = 4.5V
VIN = 5.0V
79
76
70
2.5
85
82
VIN = 5.5V
VIN = 5.5V
0
91
88
10
0
2.5
5
7.5
10
OUTPUT CURRENT, IO (A)
Figure 6. Converter Efficiency versus Output Current
(Vout = 3.3Vdc).
6
Austin LynxTM II SMT Non-isolated Power Modules:
2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 10A output current
Data Sheet
August 28, 2009
Characteristic Curves (continued)
The following figures provide typical characteristics for the Austin LynxTM II SMT modules at 25ºC.
10
3
2
1
0
0.5
1.5
2.5
3.5
4.5
INPUT VOLTAGE, VIN (V)
VO (V) (20mV/div)
OUTPUT VOLTAGE
Figure 7. Input voltage vs. Input Current (Vo =
2.5Vdc).
VO (V) (200mV/div)
TIME, t (10μs/div)
Figure 10. Transient Response to Dynamic Load
Change from 50% to 100% of full load (Vo = 3.3Vdc).
TIME, t (2μs/div)
Figure 9. Typical Output Ripple and Noise
(Vin = 5.0V dc, Vo = 3.3 Vdc, Io=10A).
LINEAGE POWER
VO (V) (50mV/div)
IO (A) (5A/div)
VO (V) (20mV/div)
Figure 11. Transient Response to Dynamic Load
Change from 100% to 50% of full load (Vo = 3.3 Vdc).
OUTPUT CURRENT, OUTPUT VOLTAGE
TIME, t (10μs/div)
Figure 8. Typical Output Ripple and Noise
(Vin = 5.0V dc, Vo = 0.75, Vdc, Io=10A).
OUTPUT VOLTAGE
TIME, t (2μs/div)
5.5
IO (A) (5A/div)
5
4
VO (V) (200mV/div)
7
6
IO (A) (5A/div)
Io=0A
OUTPUT CURRENT, OUTPUT VOLTAGE
INPUT CURRENT, IIN (A)
Io=5A
8
OUTPUT CURRENT, OUTPUT VOLTAGE
Io=10A
9
TIME, t (20μs/div)
Figure 12. Transient Response to Dynamic Load
Change from 50% to 100% of full load (Vo = 3.3 Vdc,
Cext = 2x150 μF Polymer Capacitors).
7
Data Sheet
August 28, 2009
Austin LynxTM II SMT Non-isolated Power Modules:
2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 10A output current
Characteristic Curves (continued)
VNN (V) (2V/div)
VOV) (1V/div)
OUTPUT VOLTAGE
INPUT VOLTAGE
Figure 15. Typical Start-Up Using Remote On/Off with
external capacitors (Vin = 5.5Vdc, Vo = 3.3Vdc, Io =
10A, Co = 1050μF).
LINEAGE POWER
VOn/off (V) (2V/div)
On/Off VOLTAGE
On/Off VOLTAGE
TIME, t (2 ms/div)
TIME, t (2 ms/div)
Figure 17. Typical Start-Up with Prebias (Vin =
3.3Vdc, Vo = 1.8Vdc, Io = 1A, Vbias =1.0Vdc).
OUTPUT CURRENT,
VOV) (1V/div)
OUTPUT VOLTAGE
VOn/off (V) (2V/div)
Figure 14. Typical Start-Up Using Remote On/Off
(Vin = 5.5 Vdc, Vo = 3.3Vdc, Io = 10A).
On/Off VOLTAGE
TIME, t (2 ms/div)
TIME, t (2 ms/div)
Figure 16. Typical Start-Up with application of Vin
(Vin = 5.5Vdc, Vo = 3.3Vdc, Io = 10A).
VOV) (1V/div)
VOV) (1V/div)
OUTPUT VOLTAGE
VOn/off (V) (2V/div)
Figure 13. Transient Response to Dynamic Load
Change from 100% of 50% full load (Vo = 5.0 Vdc,
Cext = 2x150 μF Polymer Capacitors).
OUTPUT VOLTAGE
TIME, t (20μs/div)
IO (A) (10A/div)
VO (V) (50mV/div)
IO (A) (5A/div)
OUTPUT CURRENT, OUTPUT VOLTAGE
The following figures provide typical characteristics for the Austin LynxTM II SMT modules at 25ºC.
TIME, t (10ms/div)
Figure 18. Output short circuit Current
(Vin = 5.0Vdc, Vo = 0.75Vdc).
8
Austin LynxTM II SMT Non-isolated Power Modules:
2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 10A output current
Data Sheet
August 28, 2009
Characteristic Curves (continued)
12
12
10
10
OUTPUT CURRENT, Io (A)
OUTPUT CURRENT, Io (A)
The following figures provide thermal derating curves for the Austin LynxTM II SMT modules.
8
6
4
NC
2
100 LFM
0
20
30
40
50
60
70
80
8
6
4
NC
2
100 LFM
0
90
20
O
10
OUTPUT CURRENT, Io (A)
OUTPUT CURRENT, Io (A)
10
8
6
4
NC
2
100 LFM
0
50
60
70
80
60
70
80
90
AMBIENT TEMPERATURE, TA C
12
40
50
Figure 22. Derating Output Current versus Local
Ambient Temperature and Airflow (Vin = 5.0dc, Vo=3.3
Vdc).
12
30
40
O
AMBIENT TEMPERATURE, TA C
Figure 19. Derating Output Current versus Local
Ambient Temperature and Airflow (Vin = 5.0,
Vo=0.75Vdc).
20
30
90
O
8
6
4
NC
2
0
20
30
40
50
60
70
80
90
O
AMBIENT TEMPERATURE, TA C
AMBIENT TEMPERATURE, TA C
Figure 20. Derating Output Current versus Local
Ambient Temperature and Airflow (Vin = 5.0Vdc,
Vo=1.8 Vdc).
Figure 23. Derating Output Current versus Local
Ambient Temperature and Airflow (Vin = 3.3Vdc,
Vo=2.5 Vdc).
OUTPUT CURRENT, Io (A)
12
10
8
6
4
NC
2
100 LFM
0
20
30
40
50
60
70
80
90
O
AMBIENT TEMPERATURE, TA C
Figure 21. Derating Output Current versus Local
Ambient Temperature and Airflow (Vin = 5.0Vdc,
Vo=2.5 Vdc).
LINEAGE POWER
9
Austin LynxTM II SMT Non-isolated Power Modules:
2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 10A output current
Data Sheet
August 28, 2009
Test Configurations
Design Considerations
CURRENT PROBE
TO OSCILLOSCOPE
VIN(+)
BATTERY
CIN
CS 1000μF
Electrolytic
2x100μF
Tantalum
E.S.R.<0.1Ω
TM
The Austin Lynx II SMT module should be connected
to a low ac-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.
LTEST
1μH
Input Filtering
@ 20°C 100kHz
COM
NOTE: Measure input reflected ripple current with a simulated
source inductance (LTEST) of 1μH. Capacitor CS offsets
possible battery impedance. Measure current as shown
above.
Figure 24. Input Reflected Ripple Current Test
Setup.
COPPER STRIP
To minimize input voltage ripple, low-ESR polymer and
ceramic capacitors are recommended at the input of the
module. Figure 27 shows input ripple voltage (mVp-p)
for various outputs with 1x150 µF polymer capacitors
(Panasonic p/n: EEFUE0J151R, Sanyo p/n:
6TPE150M) in parallel with 1 x 47 µF ceramic capacitor
(Panasonic p/n: ECJ-5YB0J476M, Taiyo- Yuden p/n:
CEJMK432BJ476MMT) at full load. Figure 28 shows
the input ripple with 3x150 µF polymer capacitors in
parallel with 2 x 47 µF ceramic capacitor at full load.
RESISTIVE
LOAD
1uF
.
10uF
SCOPE
COM
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.
Figure 25. Output Ripple and Noise Test Setup.
Input Ripple Voltage (mVp-p)
160
VO (+)
3.3Vin
140
5Vin
120
100
80
60
40
20
0
0
Rdistribution
Rcontact
Rcontact
VIN(+)
VO
RLOAD
VO
VIN
0.5
1
1.5
2
2.5
3
3.5
Rdistribution
Output Voltage (Vdc)
Figure 27. Input ripple voltage for various outputs
with 1x22 µF ceramic capacitor at the input (fullload).
160
Rcontact
Rcontact
COM
COM
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 26. Output Voltage and Efficiency Test Setup.
VO. IO
Efficiency
η =
VIN. IIN
x
100 %
3.3Vin
Rdistribution
Input Ripple Voltage (mVp-p)
Rdistribution
140
5Vin
120
100
80
60
40
20
0
0
0.5
1
1.5
2
2.5
3
3.5
Output Voltage (Vdc)
Figure 28. Input ripple voltage for various outputs
with 1x47 µF ceramic capacitor at the input (full
load).
LINEAGE POWER
10
Data Sheet
August 28, 2009
Austin LynxTM II SMT Non-isolated Power Modules:
2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 10A output current
Design Considerations (continued)
Safety Considerations
Output Filtering
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.
TM
The Austin Lynx II SMT module is designed for low
output ripple voltage and will meet the maximum output
ripple specification with 1 µF ceramic and 10 µF
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.
LINEAGE POWER
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.
The input to these units is to be provided with a fastacting fuse with a maximum rating of 15A in the positive
input lead.
11
Austin LynxTM II SMT Non-isolated Power Modules:
2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 10A output current
Data Sheet
August 28, 2009
Feature Description
VIN+
Remote On/Off
TM
The Austin Lynx II SMT power modules feature an
On/Off pin for remote On/Off operation. Two On/Off
logic options are available in the Austin LynxTM II series
modules. 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. Negative logic On/Off signal, no device code
suffix, turns the module OFF during logic High on the
On/Off pin and turns the module ON during logic Low.
For positive logic modules, the circuit configuration for
using the On/Off pin is shown in Figure 29. 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 10µA. 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 0.3V. When not using positive logic On/off
pin, leave the pin unconnected or tie to VIN.
MODULE
VIN+
R2
ON/OFF
+
I ON/OFF
VON/OFF
PWM Enable
Q1
I ON/OFF
ON/OFF
+
VON/OFF
PWM Enable
R1
Q2
Q1
CSS
R2
GND
_
Figure 30. Circuit configuration for using negative
logic On/OFF.
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 3.0A.
Input Undervoltage Lockout
Q2
R1
R3
Q3
CSS
R4
GND
MODULE
Rpull-up
_
Figure 29. Circuit configuration for using positive
logic On/OFF.
For negative logic On/Off devices, the circuit
configuration is shown is Figure 30. The On/Off pin is
pulled high with an external pull-up resistor (typical Rpullup = 5k, +/- 5%). When transistor Q1 is in the Off state,
logic High is applied to the On/Off pin and the power
module is Off. The minimum On/off voltage for logic
High on the On/Off pin is 1.5Vdc. To turn the module
ON, logic Low is applied to the On/Off pin by turning ON
Q1. When not using the negative logic On/Off, leave
the pin unconnected or tie to GND.
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.
Overtemperature Protection
To provide protection in a fault condition, the unit is
equipped with a thermal shutdown circuit. The unit
will shutdown if the thermal reference point Tref,
o
exceeds 125 C (typical), but the thermal shutdown is
not intended as a guarantee that the unit will survive
temperatures beyond its rating. The module will
automatically restarts after it cools down.
Output Voltage Programming
TM
The output voltage of the Austin Lynx II SMT can be
programmed to any voltage from 0.75 Vdc to 3.63 Vdc
by connecting a single resistor (shown as Rtrim in
Figure 31) between the TRIM and GND pins of the
module. Without an external resistor between the TRIM
pin and the ground, the output voltage of the module is
0.7525 Vdc. To calculate the value of the resistor Rtrim
for a particular output voltage Vo, use the following
equation:
⎡ 21070
⎤
Rtrim = ⎢
− 5110⎥ Ω
⎣Vo − 0.7525
⎦
LINEAGE POWER
12
Data Sheet
August 28, 2009
Austin LynxTM II SMT Non-isolated Power Modules:
2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 10A output current
Feature Descriptions (continued)
Output Voltage Programming (continued)
For example, to program the output voltage of the
TM
Austin Lynx II module to 1.8 Vdc, Rtrim is calculated is
follows:
⎤
⎡ 21070
Rtrim = ⎢
− 5110⎥ Ω
⎦
⎣1.8 − 0.7525
Voltage Margining
Rtrim = 15.004 kΩ
V IN(+)
V O(+)
ON/OFF
TRIM
The amount of power delivered by the module is defined
as the voltage at the output terminals multiplied by the
output current. When using the trim feature, the output
voltage of the module can be increased, which at the
same output current would increase the power output of
the module. Care should be taken to ensure that the
maximum output power of the module remains at or
below the maximum rated power (Pmax = Vo,set x Io,max).
LOAD
R trim
Output voltage margining can be implemented in the
Austin LynxTM II 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 the Output pin
for margining-down. Figure 32 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.
GND
Vo
Figure 31. Circuit configuration to program output
voltage using an external resistor.
Table 1 provides Rtrim values required for some
common output voltages.
Rmargin-down
Austin Lynx or
Lynx II Series
Q2
Table 1
VO, (V)
Rtrim (KΩ)
0.7525
Open
1.2
41.973
1.5
23.077
1.8
15.004
2.5
6.947
3.3
3.160
By a using 1% tolerance trim resistor, set point
tolerance of ±2% is 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 external
trim resistor needed for a specific output voltage..
LINEAGE POWER
Trim
Rmargin-up
Rtrim
Q1
GND
Figure 32. Circuit Configuration for margining
Output voltage.
13
Data Sheet
August 28, 2009
Austin LynxTM II SMT Non-isolated Power Modules:
2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 10A output current
Feature Descriptions (continued)
Remote Sense
Voltage Sequencing
The Austin Lynx II SMT 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 33). The voltage
between the Sense pin and Vo pin must not exceed
0.5V.
TM
The Austin Lynx II series of modules include a
sequencing feature, EZ-SEQUENCETM that enables
users to implement various types of output voltage
sequencing in their applications. This is accomplished
via an additional sequencing pin. When not using the
sequencing feature, either tie the SEQ pin to VIN or
leave it unconnected.
When an analog voltage is applied to the SEQ pin, the
output voltage tracks this voltage until the output
reaches the set-point voltage. The SEQ voltage must
be set higher than the set-point voltage of the module.
The output voltage follows the voltage on the SEQ pin
on a one-to-one volt basis. By connecting multiple
modules together, customers can get multiple modules
to track their output voltages to the voltage applied on
the SEQ pin.
TM
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 if the same
output is maintained, increases the power output by 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 output pin of
the module.
R d istrib u tio n
R co n ta c t
R c o nta ct
V IN (+ )
For proper voltage sequencing, first, input voltage is
applied to the module. The On/Off pin of the module is
left unconnected (or tied to GND for negative logic
modules or tied to VIN for positive logic modules) so that
the module is ON by default. After applying input
voltage to the module, a minimum of 10msec delay is
required before applying voltage on the SEQ pin.
During this time, potential of 50mV (± 10 mV) is
maintained on the SEQ pin. After 10msec delay, an
analog voltage is applied to the SEQ pin and the output
voltage of the module will track this voltage on a one-toone volt bases until output reaches the set-point
voltage. To initiate simultaneous shutdown of the
modules, the SEQ pin voltage is lowered in a controlled
manner. Output voltage of the modules tracks the
voltages below their set-point voltages on a one-to-one
basis. A valid input voltage must be maintained until the
tracking and output voltages reach ground potential.
R d istrib utio n
VO
S e n se
R LO AD
R d istrib u tio n
R co n ta c t
R c o nta ct
COM
R d istrib utio n
COM
Figure 33. Remote sense circuit configuration.
When using the EZ-SEQUENCETM feature to control
start-up of the module, pre-bias immunity feature during
start-up is disabled. The pre-bias immunity feature of
the module relies on the module being in the diodemode during start-up. When using the EZSEQUENCETM feature, modules goes through an
internal set-up time of 10msec, and will be in
synchronous rectification mode when voltage at the
SEQ pin is applied. This will result in sinking current in
the module if pre-bias voltage is present at the output of
the module. When pre-bias immunity during start-up is
required, the EZ-SEQUENCETM feature must be
disabled. For additional guidelines on using EZTM
TM
SEQUENCE feature of Austin Lynx II, contact the
Lineage Power technical representative for preliminary
application note on output voltage sequencing using
Austin Lynx II series.
LINEAGE POWER
14
Data Sheet
August 28, 2009
Austin LynxTM II SMT Non-isolated Power Modules:
2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 10A 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 35. Note that the airflow is parallel to
the long axis of the module as shown in figure 34. The
derating data applies to airflow in either direction of the
module’s long axis.
25.4_
(1.0)
Wind Tunnel
PWBs
Power Module
76.2_
(3.0)
x
Top View
8.3_
(0.325)
Probe Location
for measuring
airflow and
ambient
temperature
Air
flow
Figure 35. Thermal Test Set-up.
Tref
Bottom View
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 temperature (TA) for
airflow conditions ranging from natural convection and
up to 2m/s (400 ft./min) are shown in the Characteristics
Curves section.
Air Flow
Figure 34. Tref Temperature measurement location.
The thermal reference point, Tref used in the
specifications is shown in Figure 34. For reliable
operation this temperature should not exceed 115 oC.
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.
LINEAGE POWER
15
Data Sheet
August 28, 2009
Austin LynxTM II SMT Non-isolated Power Modules:
2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 10A output current
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.)
Top View
Side View
Bottom View
LINEAGE POWER
16
Data Sheet
August 28, 2009
Austin LynxTM II SMT Non-isolated Power Modules:
2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 10A output current
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.)
LINEAGE POWER
PIN
FUNCTION
1
On/Off
2
VIN
3
SEQ
4
GND
5
VOUT
6
Trim
7
Sense
17
Austin LynxTM II SMT Non-isolated Power Modules:
2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 10A output current
Data Sheet
August 28, 2009
Packaging Details
The Austin LynxTM II SMT version is supplied in tape & reel as standard. Modules are shipped in quantities of 250
modules per reel.
Pick Point
All Dimensions are in millimeters and (in inches).
Reel Dimensions
Outside diameter:
Inside diameter:
Tape Width:
LINEAGE POWER
330.2 mm (13.00)
177.8 mm (7.00”)
44.0 mm (1.73”)
18
Data Sheet
August 28, 2009
Austin LynxTM II SMT Non-isolated Power Modules:
2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 10A output current
Surface Mount Information
Pick and Place
300
P eak Temp 235oC
TM
250
REFLOW TEMP (°C)
The Austin Lynx II SMT modules use an open
frame construction and are designed for a fully
automated assembly process. The modules are fitted
with a label designed to provide a large surface area
for pick and place operations. 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.
TM
The Austin Lynx II 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
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.
150
So ak zo ne
30-240s
100
Tlim above
205oC
P reheat zo ne
max 4oCs -1
0
REFLOW TIME (S)
Figure 36. Reflow Profile for Tin/Lead (Sn/Pb)
process.
240
235
MAX TEMP SOLDER (°C)
Tin Lead Soldering
200
50
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 pick &
placement speed should be considered to optimize
this process. The minimum recommended nozzle
diameter for reliable operation is 3mm. The maximum
nozzle outer diameter, which will safely fit within the
allowable component spacing, is 8 mm max.
Co o ling
zo ne
1-4oCs -1
Heat zo ne
max 4oCs -1
230
225
220
215
210
205
200
0
10
20
30
40
50
60
o
Figure 37. Time Limit Curve Above 205 C Reflow
for Tin Lead (Sn/Pb) process.
In a conventional Tin/Lead (Sn/Pb) solder process
peak reflow temperatures are limited to less than
235oC. Typically, the eutectic solder melts at 183oC,
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.
LINEAGE POWER
19
Data Sheet
August 28, 2009
Austin LynxTM II SMT Non-isolated Power Modules:
2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 10A output current
Surface Mount Information (continued)
300
Lead Free Soldering
250
Peak Temp 260°C
Reflow Temp (°C)
The –Z version Austin Lynx II SMT modules are leadfree (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.
Per J-STD-020 Rev. C
200
150
* Min. Time Above 235°C
15 Seconds
Heating Zone
1°C/Second
Cooling
Zone
*Time Above 217°C
60 Seconds
100
50
0
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. 38.
Reflow Time (Seconds)
Figure 38. Recommended linear reflow profile
using Sn/Ag/Cu solder.
MSL Rating
The Austin Lynx II SMT modules have a MSL rating of
1
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 <= 30°C 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
20
Austin LynxTM II SMT Non-isolated Power Modules:
2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 10A output current
Data Sheet
August 28, 2009
Ordering Information
Please contact your Lineage Power Sales Representative for pricing, availability and optional features.
Table 2. Device Codes
Device Code
Input
Voltage
Range
Output
Voltage
Output
Current
Efficiency
[email protected] 10A
On/Off
Logic
Connector
Type
Comcodes
ATH010A0X3-SR
2.4 – 5.5Vdc
0.75 – 3.63Vdc
10 A
95%
Negative
SMT
108987520
ATH010A0X3-SRZ
2.4 – 5.5Vdc
0.75 – 3.63Vdc
10 A
95%
Negative
SMT
CC109104543
ATH010A0X43-SR
2.4 – 5.5Vdc
0.75 – 3.63Vdc
10 A
95%
Positive
SMT
108988333
ATH010A0X43-SRZ
2.4 – 5.5Vdc
0.75 – 3.63Vdc
10 A
95%
Positive
SMT
108996823
-Z refers to RoHS compliant codes
Asia-Pacific Headquarters
Tel: +65 6416 4283
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: [email protected]
Europe, Middle-East and Africa Headquarters
Tel: +49 89 6089 286
India Headquarters
Tel: +91 80 28411633
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.
© 2008 Lineage Power Corporation, (Mesquite, Texas) All International Rights Reserved.
LINEAGE POWER
21
Document No: DS03-105 ver. 1.03
PDF name: lynx_II_smt_ds.pdf