GE Industrial Solutions Austin Lynx II SMT User Manual

Data Sheet
September 10, 2013

Austin Lynx

2.4Vdc –5.5Vdc input; 0.75Vdc to 3.63Vdc Output;10A Output Current

TM

II SMT Non-isolated Power Modules:

RoHS Compliant

EZ-SEQUENCE

TM

Applications

 Distributed power architectures

 Intermediate bus voltage applications

 Telecommunications equipment

 Servers and storage applications

 Networking equipment

 Enterprise Networks

 Latest generation IC’s (DSP, FPGA, ASIC) and

Microprocessor powered applications

Features

 Compliant to RoHS EU Directive 2002/95/EC (-Z

versions)

 Compliant to ROHS EU Directive 2002/95/EC with

lead solder exemption (non-Z versions)

 Flexible output voltage sequencing EZ-

SEQUENCE

 Delivers up to 10A output current

 High efficiency – 95% at 3.3V full load (V

 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)

 Low output ripple and noise

 High Reliability:

Calculated MTBF = 15.7M hours at 25

 Constant switching frequency (300 kHz)

 Output voltage programmable from 0.75 Vdc to

3.63Vdc via external resistor

 Line Regulation: 0.3% (typical)

 Load Regulation: 0.4% (typical)

 Temperature Regulation: 0.4 % (typical)

 Remote On/Off

 Remote sense

 Output overcurrent protection (non-latching)

 Wide operating temperature range (-40°C to 85°C)

 UL* 60950-1Recognized, CSA

03 Certified, and VDE
Licensed

 ISO** 9001 and ISO 14001 certified manufacturing

facilities

TM

†

‡

0805:2001-12 (EN60950-1)

C22.2 No. 60950-1-

= 5.0V)

IN

o

C Full-load

Description

Austin LynxTM 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 (V
SEQUENCE
multiple voltages on a board.

* UL is a re gistered trademark of Underwriters Laboratories, Inc.

†

CSA is a reg istered trademark of Canadian Standards Associatio n.

‡

VDE is a t rademark of Verband Deutscher Elektrotechniker e.V.

** ISO is a registered trademark of the International Orga nization of Standards

TM

that enable designers to implement various types of output voltage sequencing when powering

= 2.4 – 5.5Vdc). The Austin LynxTM II series has a sequencing feature, EZ-

IN

Document No: DS03-105 ver. 1.04

PDF name: lynx_II_smt_ds.pdf

Data Sheet
September 10, 2013

Austin Lynx

2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 10A output current

TM

II SMT Non-isolated Power Modules:

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

Input Voltage All V

Continuous

Sequencing voltage All Vseq -0.3 V

Operating Ambient Temperature All T

(see Thermal Considerations section)

Storage Temperature All T

IN

A

stg

-0.3 5.8 Vdc

Vdc

IN,max

-40 85 °C

-55 125 °C

Electrical Specifications

Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature
conditions.

Parameter Device Symbol Min Typ Max Unit

Operating Input Voltage Vo ≤ V

Maximum Input Current All I

(VIN=2.4V to 5.5V, IO=I

Input No Load Current Vo = 0.75Vdc I

)

O, max

- 0.5 VIN 2.4

IN

IN,max

IN,No load

10 Adc

25 mA

⎯

5.5 Vdc

(VIN = 5.0Vdc, IO = 0, module enabled) Vo = 3.3Vdc I

Input Stand-by Current All I

(VIN = 5.0Vdc, module disabled)

Inrush Transient All I2t 0.1 A2s

Input Reflected Ripple Current, peak-to-peak
(5Hz to 20MHz, 1μH source impedance; V
V

Input Ripple Rejection (120Hz) All 30 dB

IN, max, IO

= I

; See Test Configurations)

Omax

IN, min

to

All 100 mAp-p

30 mA

IN,No load

1.5 mA

IN,stand-by

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
September 10, 2013

Austin Lynx

2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 10A output current

TM

II SMT Non-isolated Power Modules:

Electrical Specifications (continued)

Parameter Device Symbol Min Typ Max Unit

Output Voltage Set-point All V

(VIN=

IN, min

, IO=I

, TA=25°C)

O, max

Output Voltage All V

(Over all operating input voltage, resistive load,
and temperature conditions until end of life)

Adjustment Range All V

Selected by an external resistor

O, set

O, set

O

Output Regulation

Line (VIN=V

Load (IO=I

Temperature (T

IN, min

O, min

to V

to I

ref=TA, min

) All

IN, max

) All

O, max

to T

) All ⎯ 0.4

A, max

Output Ripple and Noise on nominal output

(VIN=V

IN, nom

and IO=I

O, min

to I

O, max

Cout = 1μF ceramic//10μFtantalum capacitors)

RMS (5Hz to 20MHz bandwidth) All

Peak-to-Peak (5Hz to 20MHz bandwidth) All

External Capacitance

ESR ≥ 1 mΩ All C

ESR ≥ 10 mΩ All C

Output Current All I

Output Current Limit Inception (Hiccup Mode ) All I

(VO= 90% of V

)

O, set

Output Short-Circuit Current All I

(VO≤250mV) ( Hiccup Mode )

Efficiency V

VIN= V

IO=I

, TA=25°C V

IN, nom

= V

O, max , VO

V

O,set

V

V

V

= 0.75Vdc η 81.5 %

O,set

= 1.2Vdc η 87.0 %

O, set

= 1.5Vdc η 89.0 %

O,set

= 1.8Vdc η 90.0 %

O,set

= 2.5Vdc η 93.0 %

O,set

= 3.3Vdc η 94.0 %

O,set

Switching Frequency All f

O, max

O, max

o

O, lim

O, s/c

sw

Dynamic Load Response

(dIo/dt=2.5A/μs; VIN = V

IN, nom

; TA=25°C)

Load Change from Io= 50% to 100% of
Io,max; 1μF ceramic// 10 μF tantalum

All V

pk

Peak Deviation

Settling Time (Vo<10% peak deviation)

(dIo/dt=2.5A/μs; VIN = V

IN, nom

; TA=25°C)

Load Change from Io= 100% to 50%of Io,max:
1μF ceramic// 10 μF tantalum

All t

All V

s

pk

Peak Deviation

Settling Time (Vo<10% peak deviation)

All t

s

-2.0 V

-3%

+2.0 % V

O, set

⎯

+3% % V

0.7525 3.63 Vdc

⎯

⎯

⎯

⎯

0.3

0.4

⎯

⎯

⎯

8 15 mV

25 50 mV

% V

% V

% V

⎯ ⎯

⎯ ⎯

1000 μF

5000 μF

0 10 Adc

⎯

⎯

200

3.0

⎯

⎯

⎯

⎯

⎯

⎯

⎯

300

250

50

250

50

⎯

⎯

⎯ μs

⎯

⎯ μs

pk-pk

% I

Adc

kHz

mV

mV

O, set

O, set

O, set

O, set

O, set

rms

o

LINEAGE POWER 3

Data Sheet
September 10, 2013

Austin Lynx

2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 10A output current

TM

II SMT Non-isolated Power Modules:

Electrical Specifications (continued)

Parameter Device Symbol Min Typ Max Unit

Dynamic Load Response

(dIo/dt=2.5A/μs; V VIN = V

Load Change from Io= 50% to 100% of Io,max;
Co = 2x150 μF polymer capacitors

Peak Deviation

Settling Time (Vo<10% peak deviation)

(dIo/dt=2.5A/μs; VIN = V

Load Change from Io= 100% to 50%of Io,max:
Co = 2x150 μF polymer capacitors

Peak Deviation

Settling Time (Vo<10% peak deviation)

IN, nom

IN, nom

; TA=25°C)

; TA=25°C)

All V

All t

All V

All t

pk

s

pk

s

⎯

⎯

⎯

⎯

60

100

60

100

⎯

⎯ μs

⎯

⎯ μs

General Specifications

Parameter Min Typ Max Unit

Calculated MTBF (IO=I

Weight

, TA=25°C) 15,726,300 Hours

O, max

⎯

2.8 (0.1)

⎯

g (oz.)

mV

mV

LINEAGE POWER 4

Data Sheet
September 10, 2013

Austin Lynx

2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 10A output current

TM

II SMT Non-isolated Power Modules:

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 ― ― 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

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)

Input High Voltage (Module OFF) All VIH 1.5 ― V

Input High Current All IIH 0.2 1 mA

Input Low Voltage (Module ON) All VIL -0.2 ― 0.3 Vdc

Input low Current All IIL ― 10 μA

Turn-On Delay and Rise Times

(IO=I

Case 1: On/Off input is set to Logic Low (Module

O, max , VIN

= V

= 25 oC, )

IN, nom, TA

All Tdelay ― 3.9 ― msec
ON) and then input power is applied (delay from
instant at which V

Case 2: Input power is applied for at least one second

=V

IN

until Vo=10% of Vo,set)

IN, min

All Tdelay ― 3.9 ― msec
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)

Output voltage Rise time (time for Vo to rise from 10%
of V

o,set to 90% of Vo, set)

All Trise

Sequencing Delay time

Delay from V

to application of voltage on SEQ pin All TsEQ-delay 10 msec

IN, min

Tracking Accuracy (Power-Up: 2V/ms) All

(Power-Down: 1V/ms) All

(V

IN, min

to V

IN, max

; I

to I

O, min

VSEQ < Vo)

O, max

SEQ –Vo

|V

SEQ –Vo

|V

Output voltage overshoot – Startup ―

IO= I

; VIN = 3.0 to 5.5Vdc, TA = 25 oC

O, max

Remote Sense Range ― ― 0.5 V
Overtemperature Protection

(See Thermal Consideration section)

Input Undervoltage Lockout

Turn-on Threshold All

Turn-off Threshold All

All T

ref

V

IN, max

Vdc

IN,max

― 4.2 8.5 msec

100 200 mV

200 400 mV

⎯

125

1

⎯

% V

°C

O, set

2.2 V

2.0 V

LINEAGE POWER 5

Data Sheet

)

)

September 10, 2013

Austin Lynx

2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 10A output current

TM

II SMT Non-isolated Power Modules:

Characteristic Curves

The following figures provide typical characteristics for the Austin LynxTM II SMT modules at 25ºC.

90

87

84

81

78

75

EFFICIENCY, (η)

72

02.557.510

VIN = 3.0V

VIN = 5.0V

VIN = 5.5V

OUTPUT CURRENT, IO (A) OUTPUT CURRENT, IO (A)

Figure 1. Converter Efficiency versus Output Current
(Vout = 0.75Vdc).

93

90

87

84

81

78

EFFICIENCY, (η)

75

72

0 2.557.510

VIN = 3.0V

VIN = 5.0V

VIN = 5.5V

OUTPUT CURRENT, I(A

Figure 2. Converter Efficiency versus Output Current
(Vout = 1.2Vdc).

94

91

88

85

82

79

76

EFFICIENCY, (η)

73

70

02.557.510

VIN = 3.0V

VIN = 5.0V

VIN = 5.5V

OUTPUT CURRENT, IO (A) OUTPUT CURRENT, IO (A)

Figure3. Converter Efficiency versus Output Current
(Vout = 1.5Vdc).

96

93

90

87

84

81

78

EFFICIENCY, (η)

75

72

02.557.510

Figure 4. Converter Efficiency versus Output Current
(Vout = 1.8Vdc).

10 0

97

94

91

88

85

82

79

EFFICIENCY, (η)

76

73

02.557.510

OUTPUT CURRENT, I

Figure 5. Converter Efficiency versus Output Current
(Vout = 2.5Vdc).

10 0

97

94

91

88

85

82

EFFICIENCY, (η)

79

76

0 2.557.510

Figure 6. Converter Efficiency versus Output Current
(Vout = 3.3Vdc).

VIN = 3.0V

VIN = 5.0V

VIN = 5.5V

VIN = 3.0V

VIN = 5.0V

VIN = 5.5V

(A

VIN = 4.5V

VIN = 5.0V

VIN = 5.5V

LINEAGE POWER 6

Data Sheet
September 10, 2013

Austin Lynx

2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 10A output current

TM

II SMT Non-isolated Power Modules:

Characteristic Curves (continued)

The following figures provide typical characteristics for the Austin LynxTM II SMT modules at 25ºC.

10

9

8

7

(A)

IN

6

5

4

3

2

INPUT CURRENT, I

1

0

0.5 1.5 2.5 3.5 4.5 5.5

INPUT VOLTAGE, VIN (V)

Figure 7. Input voltage vs. Input Current (Vo =

2.5Vdc).

Io=10 A

Io=5A

Io=0A

(V) (200mV/div)

O

(A) (5A/div) V

O

OUTPUT CURRENT, OUTPUT VOLTAGE

I

TIME, t (10μs/div)

Figure 10. Transient Response to Dynamic Load
Change from 50% to 100% of full load (Vo = 3.3Vdc).

(V) (20mV/div)

O

V

OUTPUT VOLTAGE

TIME, t (2μs/div) TIME, t (10μs/div)

Figure 8. Typical Output Ripple and Noise

(Vin = 5.0V dc, Vo = 0.75, Vdc, Io=10A).

(V) (20mV/div)

O

OUTPUT VOLTAGE

V

TIME, t (2μs/div) TIME, t (20μs/div)

Figure 9. Typical Output Ripple and Noise

(Vin = 5.0V dc, Vo = 3.3 Vdc, Io=10A).

(V) (200mV/div)

O

(A) (5A/div) V

O

OUTPUT CURRENT, OUTPUT VOLTAGE

I

Figure 11. Transient Response to Dynamic Load
Change from 100% to 50% of full load (Vo = 3.3 Vdc).

(V) (50mV/div)

O

(A) (5A/div) V

O

OUTPUT CURRENT, OUTPUT VOLTAGE

I

Figure 12. Transient Response to Dynamic Load
Change from 50% to 100% of full load (Vo = 3.3 Vdc,
Cext = 2x150 μF Polymer Capacitors).

LINEAGE POWER 7

Data Sheet

μ

September 10, 2013

Austin Lynx

2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 10A output current

TM

II SMT Non-isolated Power Modules:

Characteristic Curves (continued)

The following figures provide typical characteristics for the Austin LynxTM II SMT modules at 25ºC.

(V) (50mV/div)

O

(V) (2V/div)

NN

(A) (5A/div) V

O

I

OUTPUT CURRENT, OUTPUT VOLTAGE

TIME, t (20μs/div)

Figure 13. Transient Response to Dynamic Load
Change from 100% of 50% full load (Vo = 5.0 Vdc,
Cext = 2x150

(V) (2V/div)

On/off

V) (1V/div) V

O

OUTPUT VOLTAGE On/Off VOLTAGE

V

F Polymer Capacitors).

TIME, t (2 ms/div) TIME, t (2 ms/div)

Figure 14. Typical Start-Up Using Remote On/Off

(Vin = 5.5 Vdc, Vo = 3.3Vdc, Io = 10A).

(V) (2V/div)

On/off

V) (1V/div) V

O

OUTPUT VOLTAGE INPUT VOLTAGE

V

TIME, t (2 ms/div)

Figure 16. Typical Start-Up with application of Vin

(Vin = 5.5Vdc, Vo = 3.3Vdc, Io = 10A).

(V) (2V/div)

On/off

V) (1V/div) V

O

V

OUTPUT VOLTAGE On/Off VOLTAGE

Figure 17. Typical Start-Up with Prebias (Vin =

3.3Vdc, Vo = 1.8Vdc, Io = 1A, Vbias =1.0Vdc).

(A) (10A/div)

O

V) (1V/div) V

O

V

OUTPUT VOLTAGE On/Off VOLTAGE

igure 15. Typical Start-Up Using Remote On/Off with

F

TIME, t (2 ms/div) TIME, t (10ms/div)

external capacitors (Vin = 5.5Vdc, Vo = 3.3Vdc, Io =
10A, Co = 1050μF).

OUTPUT CURRENT,

I

Figure 18. Output short circuit Current

(Vin = 5.0Vdc, Vo = 0.75Vdc).

LINEAGE POWER 8

Data Sheet

A

O

A

O

C

September 10, 2013

Austin Lynx

2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 10A output current

TM

II SMT Non-isolated Power Modules:

Characteristic Curves (continued)

The following figures provide thermal derating curves for the Austin LynxTM II SMT modules.

12

12

10

8

6

4

NC

2

100 LFM

0

OUTPUT CURRENT, Io (A)

20 30 40 50 60 70 80 90

AMBIENT TEMPERATURE, T

C AMBIENT TEMPERATURE, T

Figure 19. Derating Output Current versus Local
Ambient Temperature and Airflow (Vin = 5.0,
Vo=0.75Vdc).

OUTPUT CURRENT, Io (A)

12

10

8

6

4

NC

2

100 LFM

0

20 30 40 50 60 70 80 90

AMBIENT TEMPERATURE, TA OC AMBIENT TEMPERATURE, TA OC

Figure 20. Derating Output Current versus Local
Ambient Temperature and Airflow (Vin = 5.0Vdc,
Vo=1.8 Vdc).

12

10

8

6

4

NC

2

100 LFM

0

OUTPUT CURRENT, Io (A)

20 30 40 50 60 70 80 90

C

Figure 22. Derating Output Current versus Local
Ambient Temperature and Airflow (Vin = 5.0dc, Vo=3.3
Vdc).

12

10

8

6

4

N

2

0

OUTPUT CURRENT, Io (A)

20 30 40 50 60 70 80 90

Figure 23. Derating Output Current versus Local
Ambient Temperature and Airflow (Vin = 3.3Vdc,
Vo=2.5 Vdc).

10

8

6

4

NC

2

100 LFM

0

OUTPUT CURRENT, Io (A)

20 30 40 50 60 70 80 90

AMBIENT TEMPERATURE, TA OC

Figure 21. Derating Output Current versus Local
Ambient Temperature and Airflow

(Vin = 5.0Vdc,

Vo=2.5 Vdc).

LINEAGE POWER 9

Data Sheet

1001201401

September 10, 2013

Austin Lynx

2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 10A output current

TM

II SMT Non-isolated Power Modules:

Test Configurations

TO OSCILLOSCOPE

L

TEST

1μH

CS 1000μF

BATTERY

NOTE: Measure input reflected ripple current with a simulated

Electrolytic

E.S.R.<0.1Ω

@ 20°C 100kHz

source induct ance (L
possible battery impedance. Measure current as shown
above.

) of 1μH. Capacit or CS offsets

TEST

Figure 24. Input Reflected Ripple Current Test
Setup.

COPPER STRIP

V

(+)

O

1uF .

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.

10uF

GROUND PLANE

Figure 25. Output Ripple and Noise Test Setup.

R

R

contact

distribution

R

R

contact

distribution

NOTE: All volt age meas urements to be taken at th e module

terminals , as shown above. If socket s are us ed then
Kelvin conn ections are requir ed at the modu le termi nals
to avoid measur ement err ors due to soc ket contact
resistance.

VIN(+)

V

IN

COM

Figure 26. Output Voltage and Efficiency Test Setup.

V

. I

O

Efficiency

=

η

VIN. I

O

IN

2x100μF

Tantalum

SCOPE

V

O

COM

CURRENT PROBE

CIN

RESISTIVE
LOAD

V

O

x 100 %

VIN(+)

COM

R

contactRdistribution

R

contactRdistribution

R

LOAD

Design Considerations

Input Filtering

The Austin LynxTM 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.

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.

60

80

60

40

20

Input Ripple Voltage (mVp-p)

0

Output Voltage (Vdc)

Figure 27. Input ripple voltage for various outputs

with 1x22 µF ceramic capacitor at the input (full-

load).

16 0

14 0

12 0

10 0

80

60

40

20

Input Ripple Voltage (mVp-p)

Output Voltage (Vdc)

Figure 28. Input ripple voltage for various outputs

with 1x47 µF ceramic capacitor at the input (full

load).

3.3Vin

5Vin

00.511.522.533.5

3.3Vin

5Vin

0

00.511.522.533.5

LINEAGE POWER 10

Data Sheet
September 10, 2013

2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 10A output current

Austin Lynx

Design Considerations (continued)

Output Filtering

The Austin LynxTM 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.

TM

II SMT Non-isolated Power Modules:

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.

The input to these units is to be provided with a fast-

acting fuse with a maximum rating of 15A in the positive

input lead

.

LINEAGE POWER 11

Data Sheet
September 10, 2013

Austin Lynx

2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 10A output current

TM

II SMT Non-isolated Power Modules:

Feature Description

Remote On/Off

The Austin LynxTM II SMT power modules feature an
On/Off pin for remote On/Off operation. Two On/Off
logic options are available in the Austin Lynx
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 = V

is 10µA. Applying a

IN,max

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 V

VIN+

R2

I

ON/OFF

GND

ON/OFF

V

ON/OFF

Q1

+

_

R1

Q2

R3

R4

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 R

= 5k, +/- 5%). When transistor Q1 is in the Off state,

up

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.

TM

II series

IN.

MODULE

PWM Enable

Q3 CSS

pull-

VIN+

ON/OFF

GND

R

pull-up

I

ON/OFF

V

ON/OFF

Q1

+

_

MODULE

PWM Enable

R1

Q2 CSS

R2

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

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 T

exceeds 125

not intended as a guarantee that the unit will survive

o

C (typical), but the thermal shutdown is

ref

temperatures beyond its rating. The module will

automatically restarts after it cools down.

Output Voltage Programming

The output voltage of the Austin LynxTM 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



−

Vo





= 5110

7525.0



−

Ω




,

LINEAGE POWER 12

Data Sheet
September 10, 2013

2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 10A output current

Austin Lynx

Feature Descriptions (continued)

Output Voltage Programming (continued)

For example, to program the output voltage of the
Austin Lynx
follows:

Figure 31. Circuit configuration to program output
voltage using an external resistor.

Table 1 provides Rtrim values required for some
common output voltages.

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..

TM

II module to 1.8 Vdc, Rtrim is calculated is

Rtrim

21070



=



−

7525.08.1



5110



Ω−




Ω= kRtrim 004.15

V

V

(+)

IN

ON/OFF

GND

(+)

O

TRIM

R

trim

Table 1

VO, (V)

0.7525 Open

1.2 41.973

1.5 23.077

1.8 15.004

2.5 6.947

3.3 3.160

Rtrim (KΩ)

LOAD

TM

II SMT Non-isolated Power Modules:

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 (P

max

= V

o,set

x I

Voltage Margining

Output voltage margining can be implemented in the

Austin Lynx

R

margin-up

margining-up the output voltage and by connecting a

resistor, R

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 R

voltage and % margin. Please consult your local

Lineage Power technical representative for additional

details.

Figure 32. Circuit Configuration for margining

Output voltage.

TM

II modules by connecting a resistor,

, from the Trim pin to the ground pin for

margin-down

Austin Lynx or
Lynx II Series

, from the Trim pin to the Output pin

margin-up

and R

margin-down

Vo

Trim

GND

for a specific output

Q2

Rtrim

Q1

Rmargin-down

Rmargin-up

o,max

).

LINEAGE POWER 13

Data Sheet
September 10, 2013

Austin Lynx

2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 10A output current

TM

II SMT Non-isolated Power Modules:

Feature Descriptions (continued)

Voltage Sequencing

The Austin LynxTM II series of modules include a
sequencing feature, EZ-SEQUENCE
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 V
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.

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 V

IN 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.

When using the EZ-SEQUENCE
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 EZ­SEQUENCE

TM

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-SEQUENCE
disabled. For additional guidelines on using EZ­SEQUENCE

TM

feature of Austin LynxTM II, contact the
Lineage Power technical representative for preliminary
application note on output voltage sequencing using
Austin Lynx II series.

TM

that enables

TM

feature to control

TM

feature must be

IN or

Remote Sense

The Austin LynxTM 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.

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

R

contact

distribution

R

distribution

R

contact

VIN(+)

COM

V

Sense

COM

Figure 33. Remote sense circuit configuration.

R

O

contact Rdistribution

R

LOAD

R

contact Rdistribution

LINEAGE POWER 14

Data Sheet

A

W

September 10, 2013

2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 10A output current

Austin Lynx

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.

Top View

T

Bottom View

ref

Air Flow

Figure 34. T

The thermal reference point, T
specifications is shown in Figure 34. For reliable
operation this temperature should not exceed 115

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.

Temperature measurement location.

ref

used in the

ref

o

C.

TM

II SMT Non-isolated Power Modules:

25.4_

ind Tunnel

PWBs

x

8.3_

(0.325)

ir

flow

Figure 35. Thermal Test Set-up.

(1.0)

Po we r M o d ul e

76.2_
(3.0)

Probe Location
for measuring
airflow and
ambient
temperature

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 (T
airflow conditions ranging from natural convection and
up to 2m/s (400 ft./min) are shown in the Characteristics
Curves section.

) for

A

LINEAGE POWER 15

Data Sheet
September 10, 2013

Austin Lynx

2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 10A output current

TM

II SMT Non-isolated Power Modules:

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
September 10, 2013

Austin Lynx

2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 10A output current

TM

II SMT Non-isolated Power Modules:

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.)

PIN FUNCTION

1 On/Off

2 VIN

3 SEQ

4 GND

5 VOUT

6 Trim

7 Sense

LINEAGE POWER 17

Data Sheet
September 10, 2013

Austin Lynx

2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 10A output current

TM

II SMT Non-isolated Power Modules:

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: 330.2 mm (13.00)

Inside diameter: 177.8 mm (7.00”)
Tape Width: 44.0 mm (1.73”)

LINEAGE POWER 18

Data Sheet
September 10, 2013

2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 10A output current

Austin Lynx

Surface Mount Information

Pick and Place

The Austin LynxTM 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 300
product information such as product code, serial
number and location of manufacture.

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.

Tin Lead Soldering

The Austin LynxTM 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.

In a conventional Tin/Lead (Sn/Pb) solder process
peak reflow temperatures are limited to less than

o

235

C. 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.

o

C. The label also carries

TM

II SMT Non-isolated Power Modules:

300

250

200

15 0

10 0

REFLOW TEMP (°C)

50

0

Peak T emp 235oC

Heat zo ne

oCs-1

max 4

Soak zo ne
30-240s

Preheat zo ne

oCs-1

max 4

REFLOW TIME (S)

Co o ling
zo ne

oCs-1

1- 4

T

above

lim

o

205

C

Figure 36. Reflow Profile for Tin/Lead (Sn/Pb)
process.

240

235

230

225

220

215

210

MAX TEMP SOLDER (°C)

205

200

0 102030405060

Figure 37. Time Limit Curve Above 205oC Reflow
for Tin Lead (Sn/Pb) process.

LINEAGE POWER 19

Data Sheet
September 10, 2013

2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 10A output current

Austin Lynx

Surface Mount Information (continued)

Lead Free Soldering

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.

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.

MSL Rating

The Austin Lynx II SMT modules have a MSL rating of
2a.

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).

TM

II SMT Non-isolated Power Modules:

300

Per J-STD-020 Rev. C

250

200

150

100

Reflow Temp (°C)

50

0

Heat ing Zone

1°C/Second

Peak Temp 260°C

* Min. Time Above 235°C
15 Seconds

*Time Above 217°C

60 Seconds

Reflow Time (Seconds)

Cooling

Zone

Figure 38. Recommended linear reflow profile
using Sn/Ag/Cu solder.

LINEAGE POWER 20

Data Sheet

a

©

September 10, 2013

Austin Lynx

2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 10A output current

TM

II SMT Non-isolated Power Modules:

Ordering Information

Please contact your Lineage Power Sales Representative for pricing, availability and optional features.

Table 2. Device Codes

Device Code

ATH010A0X3-SR 2.4 – 5.5Vdc 0.75 – 3.63Vdc 10 A

ATH010A0X3-SRZ 2.4 – 5.5Vdc 0.75 – 3.63Vdc 10 A

ATH010A0X43-SR 2.4 – 5.5Vdc 0.75 – 3.63Vdc 10 A

ATH010A0X43-SRZ 2.4 – 5.5Vdc 0.75 – 3.63Vdc 10 A

-Z refers to RoHS compliant codes

Input

Voltage

Range

Output

Voltage

Output

Current

Efficiency

3.3V@ 10A

95%

95%

95%

95%

On/Off

Logic

Negative SMT 108987520

Negative SMT CC109104543

Positive SMT 108988333

Positive SMT 108996823

Connector

Type

Comcodes

Asia-Pacific Headquarters

Tel: + 65 6593 7211

World Wide Headquarters
Lineage Power Corporation

601 Shil oh Roa d, Plano, TX 75074, USA
[phone]
(Outsi de U.S.A.: [phone])

www.lineagepower.com
e-mail: techs [e-mail]

Linea ge Power res erves th e right to make change s to the prod uct(s) or i nformat ion contained herein without not ic e. No liab ility is assum ed as a result of thei r use or

pplication . No righ ts under any patent accompany the sal e of an y such produc t(s) or informati on.

Linea ge Power D C-DC pro ducts are p rotected unde r var ious patents . Information on the se patents is availabl e at www.line agepower.com/paten ts.

2009 Line age Power Corporation, (Plan o, Texas) All Inte rn ational Rights Reserved.

Europe, Middle-East and Africa Headquarters

Tel: + 49 898 780 672 80

India Headquarters
Tel: + 91 80 2841163 3

LINEAGE POWER 21

Document No: DS03-105 ver. 1.05

PDF name: lynx_II_smt_ds.pdf