Infineon R 48V BATT Switch10, Руководство пользователя

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User Guide 4 of 46 Rev. 1.0
2022-03-09
48V Battery Switch Reference Design
R 48V BATT Switch10
Table of contents
Table of contents
About this document ....................................................................................................................... 1
Important notice ............................................................................................................................ 2
Safety precautions .......................................................................................................................... 3
Table of contents ............................................................................................................................ 4
1
The kit at a glance .................................................................................................................. 5
1.1 Scope of supply ....................................................................................................................................... 5
1.2 Block diagram .......................................................................................................................................... 6
1.3 Main features ........................................................................................................................................... 6
1.4 Technical data ......................................................................................................................................... 7
2 System and functional description ........................................................................................... 8
2.1 Getting started ......................................................................................................................................... 8
2.2 Description of the functional blocks ....................................................................................................... 9
2.2.1 Power supply ...................................................................................................................................... 9
2.2.2 Power stage ........................................................................................................................................ 9
2.2.3 Precharge circuit .............................................................................................................................. 10
2.2.4 MOSFET gate driver .......................................................................................................................... 11
2.2.5 Shunt based current sensing ........................................................................................................... 12
2.2.6 Hall based current sensor ................................................................................................................ 14
2.2.7 Freewheeling .................................................................................................................................... 16
2.2.8 Microcontroller interface ................................................................................................................. 17
2.3 Basic operation ...................................................................................................................................... 18
2.3.1 Operating the switch via buttons and status LEDs ......................................................................... 18
2.3.2 Operating the switch via command line interface .......................................................................... 20
2.4 Configuration ......................................................................................................................................... 23
3 System design....................................................................................................................... 27
3.1 Power board .......................................................................................................................................... 27
3.1.1 Power board schematics ................................................................................................................. 29
3.1.2 Power board layout .......................................................................................................................... 30
3.1.3 Power board bill of material ............................................................................................................ 32
3.2 Adaptor board ....................................................................................................................................... 34
3.2.1 Adaptor board schematics ............................................................................................................... 34
3.2.2 Adaptor board layout ....................................................................................................................... 37
3.2.3 Adaptor board bill of material ......................................................................................................... 38
4 System performance ............................................................................................................. 40
4.1 Thermal performance ........................................................................................................................... 40
4.2 Precharging ........................................................................................................................................... 41
4.3 Overcurrent detection via shunt resistor ............................................................................................. 42
4.4 Overcurrent detection with hall sensor ................................................................................................ 43
References .................................................................................................................................... 44
Revision history ............................................................................................................................. 45