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- Manufacturer or author: Infineon
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Application Note AN 2010-05 V1.1, June 2014 AN2010-05 MA3AE12_EVAL – Isolating Amplifier for current measurement with MIPAQTM Base IFAG IPC APS
Application Note AN 2010-03 V1.0, November 2009 Application Note AN 2010-05 V1.1, June 2014 Edition 2010-05-07 Published by Infineon Technologies AG
59568 Warstein, Germany
© Infineon Technologies AG 2010. All Rights Reserved. Attention please! THE INFORMATION GIVEN IN THIS APPLICATION NOTE IS GIVEN AS A HINT FOR THE IMPLEMENTATION OF THE INFINEON TECHNOLOGIES COMPONENT ONLY AND SHALL NOT BE REGARDED AS ANY DESCRIPTION OR WARRANTY OF A CERTAIN FUNCTIONALITY, CONDITION OR QUALITY OF THE INFINEON TECHNOLOGIES COMPONENT. THE RECIPIENT OF THIS APPLICATION NOTE MUST VERIFY ANY FUNCTION DESCRIBED HEREIN IN THE REAL APPLICATION. INFINEON TECHNOLOGIES HEREBY DISCLAIMS ANY AND ALL WARRANTIES AND LIABILITIES OF ANY KIND (INCLUDING WITHOUT LIMITATION WARRANTIES OF NON-INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OF ANY THIRD PARTY) WITH RESPECT TO ANY AND ALL INFORMATION GIVEN IN THIS APPLICATION NOTE. Information For further information on technology, delivery terms and conditions and prices please contact your nearest Infineon Technologies Office (www.infineon.com). Warnings Due to technical requirements components may contain dangerous substances. For information on the types in question please contact your nearest Infineon Technologies Office. Infineon Technologies Components may only be used in life-support devices or systems with the express written approval of Infineon Technologies, if a failure of such components can reasonably be expected to cause the failure of that life- support device or system, or to affect the safety or effectiveness of that device or system. Life support devices or systems are intended to be implanted in the human body, or to support and/or maintain and sustain and/or protect human life. If they fail, it is reasonable to assume that the health of the user or other persons may be endangered. AN2010-05 Revision History: 2014-06, V1.1 Previous Version:V1.0 Changes since last revision Email address updated SP number updated Author: Alain Siani(IFAG IMM INP M AE) We Listen to Your Comments Any information within this document that you feel is wrong, unclear or missing at all? Your feedback will help us to continuously improve the quality of this document. Please send your proposal (including a reference to this document) to: WAR-IGBT-Application@infineon.com
Application Note AN 2010-03 V1.0, November 2009 Application Note AN 2010-05 V1.1, June 2014 Table of contents MA3AE12_EVAL – Isolating Amplifier for current measurement with MIPAQTM Base
Application Note AN 2010-03 V1.0, November 2009 Application Note AN 2010-05 V1.1, June 2014 1. Introduction The MA 3AE12_EVAL current measurement board as shown in Figure 1 was developed to support user during their first steps designing applications with the MIPAQTM base modules. The MA3AE12 current measurement evaluation boards are available from Infineon in small quantities. Functions and properties of these parts are described in the datasheet chapter of this document whereas the remaining paragraphs provide information intended to enable the c ustomer to copy, modify and qualify the design for production. The design of the MA3AE12 was performed with respect to the environmental conditions described as design target in this document. The requirements for lead free reflow soldering have been cons idered when components were selected. The design was tested as described in this documentation but not qualified regarding manufacturing and operation in the whole ambient temperature operating range or lifetime. The boards provided by Infineon are subjected to functional testing only. Due to their purpose, the evaluation boards are not subjected to the same procedures regarding Returned Material Analysis (RMA), Process Change Notification (PCN) and Product Discontinuation (PD) as regular products. See legal disclaimer and warnings for further restrictions on Infineon’s warranty and liability. a) Top side b) bottom side Figure 1 The Module Power supply board
1.1 Part number explanation
The notation of this evaluation has to be interpreted as explained in the following Table MA3AE12_EVAL MA Module Adapter board 3A measured current up to 300A E12 Maximum blocking voltage of IGBT Module 1200V EVAL Evaluation Board Table 1 Explanation of the part number MA3AE12_EVAL – Isolating Amplifier for current measurement with MIPAQTM Base
Application Note AN 2010-03 V1.0, November 2009 Application Note AN 2010-05 V1.1, June 2014
1.2 Key data
All values given in the Table bellow are values at ambient temperature TA = 25 °C. Parameter min Typ Max Unit Input side Supply voltage VCC 7 25 V Output side supply voltage VDD2 4,5 5 5,5 V Input side supply current IP 9 16 mA Output side supply current IS 13 16 mA Input voltage range (linear) -200 +200 mV Table 2 General key data and characteristic values
2 Design features
Electrical features of the evaluation board and mechanical dimensions including necessary interface connections are presented in following sections.
2.1 Main features
The MA3AE12_EVAL offers the following features: 15 kV/µs Common-Mode Rejection at VCM = 1000 V A fully differential amplifier ACPL-C78A PCB is designed to fulfill the requirements of IEC61800 -5-1, pollution degree 2, overvoltage category III
2.2 Dimension of the Board
MA3AE12_EVAL – Isolating Amplifier for current measurement with MIPAQTM Base
Application Note AN 2010-03 V1.0, November 2009 Application Note AN 2010-05 V1.1, June 2014
2.3 Functionality
The MA3AE12 board offers a reliable and cost efficient solution to sense each output phase current of the MIPAQ TM base in Figure 2. MA3AE12 requires to be powered by two different sources. The primary side of MA3AE12 can be powered by respectively floating top igbt gate driver voltage supply. The second side of MA3AE12 can be powered by one external source. This could be the same supply that is used for the external control unit. The voltage from the current s ensing resistor1 is applied to the input Rs+ and Rs - through an RC anti- aliasing filter (R1 and C2). The differential output voltage OUT+ and OUT - is proportional to the main IGBT phase current and can be externally converted to a single -ended signal by us ing an operational amplifier. Figure 2 Current measurement on MIPAQTM base with MA3AE12_EVAL
2.4 Linearity
The transfer linearity of the chosen differential Amplifier ACPL -C78A as described in the datasheet 2, is ensured up to the nominal current of all available MIPAQTM base modules. MIPAQTM base Shunt resistor value [m] Shunt voltage @ Inom [mV] IFS75B12N3T4_B31 2,4 180 IFS100B12N3T4_B31 1,5 150 IFS150B12N3T4_B31 1 150 Table 3 Shunt voltage according to the MIPAQTM base module Note: the series ACPL-C79X is available for higher accuracy.
1 Shunt resistor internal to MIPAQTM base
2 Further information is available in the datasheet
MA3AE12_EVAL – Isolating Amplifier for current measurement with MIPAQTM Base
Application Note AN 2010-03 V1.0, November 2009 Application Note AN 2010-05 V1.1, June 2014
3 Schematic and Layout of MA3AE12_EVAL
To meet the individual customer requirements and to make the evaluation board a simple starting point for further developments or modifications, all necessary technical data like schematic, layout and components are included in this chapter.
3.1 Schematics
3.2 Layout
3.3 Bill of Material - MA3AE12_EVAL
The tolerances for resistors should be less or equal ±1 %, for capacitors of the type C0G less or equal ±5 % and for capacitors of the type X7R less or equal ±10 %. Type Value / Type Package QTY Name Part Recommended Manufacturer Capacitor 100n/25V/X7R 0603 3 C3, C4 - Capacitor 100n/25V/X7R 1206 3 C1 - Capacitor 10n/25V/X7R 0603 1 C2 - Semiconductor ZMR500FTA SOT23 1 IC1 Zetex Semiconductor ACPL-C78A SSO-8 1 IC2 Avago Resistor 68R 0805 1 R1 - Resistor 47R 0805 2 R3, R4 - Table 4 Bill of Material for MA3AE12_EVAL MA3AE12_EVAL – Isolating Amplifier for current measurement with MIPAQTM Base
Application Note AN 2010-03 V1.0, November 2009 Application Note AN 2010-05 V1.1, June 2014
4 How to order Evaluation Boards
Every Evaluation Board has its own IFX order number and can be ordered via your Infineon Sales Partner. Information can also be found at the Infineon’s Web Page: www.infineon.com CAD-data for the board described here are available on request. The use of this data is subjected to the disclaimer given in this AN. Please contact: WAR-IGBT-Application@infineon.com IFX order number for MA3AE12_EVAL: SP000855486
5 References
Datasheet of IFS75B12N3T4_B31 Datasheet of IFS100B12N3T4_B31 Datasheet of IFS150B12N3T4_B31 MA3AE12_EVAL – Isolating Amplifier for current measurement with MIPAQTM Base