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Advance Data Sheet: Maxeta

TM

 iFA Series

 

©2005 TDK Innoveta Inc.  
iFA Advance Datasheet   6/6/2005 

 

 (877) 498-0099

 

10/18 

 

 
Thermal Management: 

 

An important part of the overall system 
design process is thermal management; 
thermal design must be considered at all 
levels to ensure good reliability and lifetime 
of the final system.  Superior thermal design 
and the ability to operate in severe 
application environments are key elements 
of a robust, reliable power module. 
 
A finite amount of heat must be dissipated 
from the power module to the surrounding 
environment. This heat is transferred by the 
three modes of heat transfer:  convection, 
conduction and radiation.  While all three 
modes of heat transfer are present in every 
application, convection is the dominant 
mode of heat transfer in most applications.  
However, to ensure adequate cooling and 
proper operation, all three modes should be 
considered in a final system configuration. 
 
The open frame design of the power module 
provides an air path to individual 
components.  This air path improves 
convection cooling to the surrounding 
environment, which reduces areas of heat 
concentration and resulting hot spots. 
 

Test Setup:

 The thermal performance data 

of the power module is based upon 
measurements obtained from a wind tunnel 
test with the setup shown in the wind tunnel 
figure.  This thermal test setup replicates the 
typical thermal environments encountered in 
most modern electronic systems with 
distributed power architectures.  The 
electronic equipment in networking, telecom, 
wireless, and advanced computer systems 
operates in similar environments and utilizes 
vertically mounted printed circuit boards 
(PCBs) or circuit cards in cabinet racks. 
 
The power module is mounted on a 0.062 
inch thick, 6-layer, 2oz/layer PCB and is 
vertically oriented within the wind tunnel.  
Power is routed on the internal layers of the 
PCB.  The outer copper layers are thermally 
decoupled from the converter to better 
simulate the customer’s application.  This 
also results in a more conservative derating.   
 

 
The cross section of the airflow passage is 
rectangular with the space between the top 
of the module or heatsink (where applicable) 
and a parallel facing PCB is kept at a 
constant (0.5 in).  The power module’s 
orientation with respect to the airflow 
direction can have a significant impact on 
the unit’s thermal performance. 
 

Thermal De-rating

:

 

For proper application 

of the power module in a given thermal 
environment, output current de-rating curves 
are provided as a design guideline in the 
 

 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

 
 
Thermal Performance section for the power 
module of interest.  The module temperature 
should be measured in the final system 
configuration to ensure proper thermal 
management of the power module.  For 
thermal performance verification, the module 
temperature should be measured at the 
location indicated in the thermal 
measurement location figure on the Thermal  
 
 

AIRFLOW 

Air Velocity and Ambient 
Temperature 
 Measurement Location

 


O

W

 

12.7 
(0.50)

 

Module 
Centerline

 

Air Passage 
Centerline

 

Adjacent PCB 

76  (3.0) 

Wind Tunnel Test Setup Figure  

Dimensions are in millimeters and (inches). 

 

Содержание Maxeta iFA Series

Страница 1: ...ons Standard Features Industry Standard Full Brick Power density 108W cubic inch High efficiency up to 92 Nominal input efficiency 89 at 100 load Nominal input efficiency 90 at 80 load Up to 602W of output power in high ambient Meets basic insulation requirements Voltage foldback constant current limit Start up into pre biased output bus User selectable on off either positive or negative logic Wid...

Страница 2: ...Voltage Output Current Maximum Output Power Efficiency iFA24021A280V 020 19V to 36V 28V 21 5A 602W 89 iFA24018A280V 020 19V to 36V 28V 18A 504W 90 Feature Set OVP Out Replaces Power Good Pin Length PEM Stud Style Special Code 00 No 0 145 Threaded No 01 No 0 110 Threaded No 02 Yes 0 145 Threaded No 03 Yes 0 110 Threaded No 20 No 0 145 Thru hole No 26 No 0 200 Thru hole Yes Voltage foldback constant...

Страница 3: ...noveta Inc iFA Advance Datasheet 6 6 2005 877 498 0099 3 18 Mechanical Specification Unless otherwise specified tolerances are x x 0 5 mm x xx 0 02 in x xx 0 25 mm x xxx 0 010 in 1 2 3 5 6 7 8 9 10 12 4 13 14 15 16 17 Recommended hole pattern top view ...

Страница 4: ... Vout 15 TRIM 4 Vin 10 Vout 16 SENSE 5 Vout 11 Not present 17 SENSE 6 Vout 12 AUX OUT 18 Pin base material is copper The maximum module weight is 250g 8 8 oz Heatsink Offering TDK Innoveta Part Number Height Orientation Overall Module Height HS00016 0 50 Transverse 1 00 HS00017 1 00 Transverse 1 50 HS00020 0 50 Longitudinal 1 00 HS00021 1 00 Longitudinal 1 50 Transverse Heatsinks Longitudinal Heat...

Страница 5: ... Startup Delay Time from on off 8 mS Vin Vin nom Io Io max Tc 25 C Output Voltage Rise Time 42 60 mS Io Io max Vo 0 1 to 0 9 Vo nom Tc 25 C Inrush Transient 1 A2 S Input Reflected Ripple 5 mApp Vin Vin nom Io Io max 0 to 20MHz See input output ripple measurement figure BW 5 MHz Input Ripple Rejection 41 dB 120Hz Engineering Estimate Telecom 24V battery plant voltage is typically set at 27 24V Caut...

Страница 6: ...nd Noise Voltage 13 50 mVrms Vin 48V Io Io min Tc 25 C with a 0 1µF a 10µF ceramic two 220µF low esr aluminum capacitors located 2 inch away See input output ripple measurement figure BW 20MHz Output Voltage Adjustment Range 60 110 Vo nom Po Po max refer to Output Voltage Adjustment figure for Vin min requirement Remote Output Voltage Sense Range 0 5 Vdc Dynamic Response Settling Time to 10 Peak D...

Страница 7: ...V Vin 24V Vin 36V Vin 32V Typical Efficiency vs Input Voltage and Load at Ta 25 C Typical Power Dissipation vs Input Voltage and Load at Ta 25 C 27 94 27 945 27 95 27 955 27 96 27 965 27 97 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 Output Current A O u tp u t V o lta g e V Vin 19V Vin 24V Vin 36V Vin 32V Typical Output Voltage vs Load Current at Ta 25 Start up from ON OFF switch at nomin...

Страница 8: ... Input Voltage V Input C urrent A Io_min 2 1A Io_mid 10 6A Io_max 21 1A Dynamic Load Transient Load step from 33 to 66 of full load with 200Hz High Slew Rate Ch 1 Vo Ch 4 Io Input Start up Current vs Line and Load Current at Ta 25 C 27 95 27 955 27 96 27 965 27 97 27 975 27 98 19 21 23 25 27 29 31 33 35 37 Input Voltage V O u tp u t V o lta g e V Io_min 2 1A Io_mid 10 6A Io_max 21 1A 0 4 8 12 16 2...

Страница 9: ...large number of variables in system design TDK Innoveta recommends that the user verify the module s thermal performance in the end application The critical component should be thermo coupled and monitored and should not exceed the temperature limit specified in the derating curve above It is critical that the thermocouple be mounted in a manner that gives direct thermal contact otherwise signific...

Страница 10: ...uted power architectures The electronic equipment in networking telecom wireless and advanced computer systems operates in similar environments and utilizes vertically mounted printed circuit boards PCBs or circuit cards in cabinet racks The power module is mounted on a 0 062 inch thick 6 layer 2oz layer PCB and is vertically oriented within the wind tunnel Power is routed on the internal layers o...

Страница 11: ...cold plate The iFA platform is designed with a base plate with four M3 X 0 5 through threaded mounting fillings for attaching a heatsink or cold plate A non threaded version is also available The addition of a heatsink can reduce the airflow requirement ensure consistent operation and extended reliability of the system With improved thermal performance more power can be delivered at a given enviro...

Страница 12: ...endent of the main PWM control loop that reduces the risk of over voltage appearing at the output of the power module during a fault condition If there is a fault in the main regulation loop the over voltage protection circuitry will latch the power module off once it detects the over voltage condition as specified on the electrical data page To remove the module from the latched condition either ...

Страница 13: ...veta Inc for details Output Voltage Adjustment The output voltage of the power module is adjustable by the user using an external resistor or by applying external voltage However when the output voltage is increased the input voltage range is limited as shown in the following figure To trim the output voltage up a fixed or variable resistor Rext1 shall be connected between the Vout pin and the sen...

Страница 14: ...on Rext2 Vo_down 0 331 4 787591 0 171506Vo_down Trim dow n Resistance vs Vout 1 10 100 1000 10000 16 18 20 22 24 26 28 Output Voltage V Trim Resistance KΩ In order to trim the output voltage from the minimum value 40 down to the maximum value 10 up in a linear fashion a fixed resistor Rext should be connected between the trim pin and the sense pin while a 50KΩ variable resistor Rv shall be connect...

Страница 15: ...ood signal The power good pin provides an open collector signal referenced to the output sense pin that is pulled low during normal operation of the power module The power good circuitry will pull the power good pin below 1V while sinking a maximum sink current of 5mA The maximum allowed voltage to the pin is 35V In order for the power good to pull low the following conditions must all be met None...

Страница 16: ...h designing for EMC compliance please contact Innoveta technical support Input Impedance The source impedance of the input power feeding the DC DC converter module will interact with the DC DC converter which may cause system instability To minimize the interaction two or more 470µF 50V input electrolytic capacitor s should be present if the source inductance is greater than 4µH Reliability The po...

Страница 17: ...ons are typically obtained for each product platform The iFA products have the following certifications UL 60950 US Canada VDE 0805 CB Scheme IEC 950 CE Mark EN60950 For safety agency approval of the system in which the DC DC power module is installed the power module must be installed in compliance with the creepage and clearance requirements of the safety agency The isolation is basic insulation...

Страница 18: ... from TDK Innoveta TDK Innoveta Inc 3320 Matrix Drive Suite 100 Richardson Texas 75082 Phone 877 498 0099 Toll Free 469 916 4747 Fax 877 498 0143 Toll Free 214 239 3101 support tdkinnoveta com http www tdkinnoveta com Information furnished by TDK Innoveta is believed to be accurate and reliable However TDK Innoveta assumes no responsibility for its use nor for any infringement of patents or other ...

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