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Motor Control Shield for Arduino Motor Control Shield for Arduino with BTN70301EPA About this document Scope and purpose This document describes how to use the Motor Control Shield with BTN7030-1EPA for Arduino. Intended audience Engineers, hobbyists and students who want to add a powerful Motor Control to Arduino projects. Related information Table 1 Supplementary links and document references Reference Description BTN7030-1EPA Reference Manuals Product page which contains reference information for the half-bridge BTN7030-1EPA Arduino Home Page All information on Arduino Arduino Uno Product Page Arduino Uno R3 description XMC-for-Arduino Instruction on how to install SEGGER J-Link XMC1100 Boot Kit Product page which contains reference information for the XMC1100 Boot Kit uIO Stick Product page User Manual www.infineon.com Rev. 1.0 2021-01-21 Motor Control Shield for Arduino with BTN7030-1EPA Motor Control Shield introduction Table of Contents About this document ....................................................................................................................... 1 Table of Contents ........................................................................................................................... 2 1 1.1 1.2 1.3 Motor Control Shield introduction ................................................................................... 3 Motor Control Shield overview ............................................................................................................... 3 Key features ............................................................................................................................................. 3 Block diagram of a full-bridge Motor Control ........................................................................................ 5 2 2.1 2.2 Motor Control Shield board description............................................................................ 6 Schematics .............................................................................................................................................. 6 External components .............................................................................................................................. 7 3 3.1 3.2 3.3 3.4 BTN7030-1EPA overview................................................................................................. 9 Key features of the BTN7030-1EPA Novalith IC™ ................................................................................... 9 Block diagram........................................................................................................................................ 10 Pin assignment ...................................................................................................................................... 11 Pin definitions and functions BTN7030-1EPA ...................................................................................... 11 4 4.1 4.1.1 4.1.2 Getting started ............................................................................................................. 12 Target applications ............................................................................................................................... 12 Getting started: Arduino Shield ....................................................................................................... 12 Getting started: uIO Stick Software ................................................................................................. 13 5 Revision history ............................................................................................................ 15 User Manual 2 Rev. 1.0 2021-01-21 Motor Control Shield for Arduino with BTN7030-1EPA 1 Motor Control Shield introduction 1.1 Motor Control Shield overview The Motor Control Shield adds powerful motor control to the Arduino projects. The shield can be controlled with the general logic IO-Ports of a microcontroller. Either an Arduino Uno R3 or the XMC1100 Boot Kit from Infineon can be used as the master. Another way to control this board is via uIO Port using Infineon uIO Stick. The device is a monolithic chip integrated in SMART7 technology. BTN7030-1EPA is a protected half-bridge with integrated driver, providing protection and diagnosis functions. The high side power stage is built using a Nchannel vertical power MOSFET with charge pump, while the low side power stage uses no charge pump. This device has an exposed pad which ensures better cooling. The BTN7030-1EPA half-bridge is easy to control by applying logic level signals to the IN and EN pin. When applying a PWM to the IN pin the current provided to the motor can be controlled with the duty cycle of the PWM. BTN7030-1EPA NovalithICTM Lite are intended to be used for frequencies up to 2kHz. 1.2 Key features The Motor Control Shield has the following features:           An Arduino Uno R3 or XMC1100 Boot Kit can control the two BTN7030-1EPA devices via the general IO pins. 6 – 18 V nominal input voltage (max. 3.8 – 28 V) Typical nominal current 7 A (current limitation is temperature dependent - 14 A @150ºC) Drives either one brushed bi-directional DC motor or two uni-directional DC motors. Capable of PWM up to 2 kHz Status flag diagnosis with current sense capability Current sense accuracy ~ 5% Protection against overtemperature, overcurrent, cross current, undervoltage Voltage clamping OFF state diagnosis (missing load and short circuit to battery or ground) User Manual 3 Rev. 1.0 2021-01-21 Motor Control Shield for Arduino with BTN7030-1EPA BTN7030-1EPA ArduinoTM headers IC2 enable uIO Stick Port OUT2 GND OUT1 VS ArduinoTM headers Figure 1 Motor Control Shield photo As shown in Figure 1 in order to enable the usage of IC2 it is necessary to solder together the two pads marked in blue frame. User Manual 4 Rev. 1.0 2021-01-21 Motor Control Shield for Arduino with BTN7030-1EPA 1.3 Block diagram of a full-bridge Motor Control As a starting point for the Motor Control Shield, the application block diagram shown in Figure 2 was used. To be flexible in the usage of the Motor Control Shield each IN, EN and DEN of the two half-bridges is connected to a separate IO pin. Figure 2 Application circuit for a bi-directional motor control with BTN7030- User Manual 5 Rev. 1.0 2021-01-21 Motor Control Shield for Arduino with BTN7030-1EPA 2 Motor Control Shield board description For a safe and sufficient motor control design, discrete components are needed. Some of them must be dedicated to the motor application and some to the NovalithIC™ Lite. Figure 3, Figure 4 show the schematics plus the corresponding layout of the Motor Control Shield. 2.1 Schematics In Figure 3 the schematics of the Motor Control Shield is shown. The schematics are based on the application circuit in the BTN7030-1EPA Data Sheet. Figure 3 Schematics Motor Control Shield for Arduino with BTN7030-1EPA User Manual 6 Rev. 1.0 2021-01-21 Motor Control Shield for Arduino with BTN7030-1EPA Figure 4 Motor Control Shield for Arduino with BTN7030-1EPA – Layout 2.2 External components All the external components shown in Figure 2 are described in the BTN7030-1EPA Design and PCB guideline Application Note. Besides these components there are some others placed on this Arduino Shield in order to insure the proper functioning. C4, so called DC-link capacitor: This electrolytic capacitor is required to keep the voltage ripple at the VSpin low during switching operation. It is usually recommended that the voltage ripple at the Vs-pin to the GNDpin is kept below 1 V peak to peak. The value of C4 must be aligned accordingly. Most electrolytic capacitors are less effective at cold temperatures. It must be assured that C4 is also effective under the worst case conditions of the application. The layout is very important too. As shown in Figure 4, the capacitor C4 must be positioned with very short wiring close to the NovalithIC™ Lite chip. This must be done to keep the parasitic inductors of the PCB-wires as small as possible. On this shield capactior of 330 uF is mounted.  𝐶𝐷𝐶−𝐿𝑖𝑛𝑘 = User Manual 𝐼𝑛𝑜𝑚 ∗ 𝑇𝑃𝑊𝑀 ∗ 𝑑𝑢𝑡𝑦_𝑐𝑦𝑐𝑙𝑒 7𝐴 ∗ 0.00025𝑠 (1𝑘𝐻𝑧) ∗ 0.5(50%) = = 875𝑢𝐹 ∆𝑉𝑆 1𝑉 7 Rev. 1.0 2021-01-21 Motor Control Shield for Arduino with BTN7030-1EPA C1/C3: This ceramic capacitors support C4 to keep the supply voltage ripple low and cover the fast transients between the Vs-pin and the GND-pin. The layout wiring for C1/C3 must be shorter than for C4 to the NovalithIC™ Lite to keep the parasitic PCB-wire inductance as small as possible. In addition the parasitic inductance could be kept low by placing at least two vias for the connection to the GND-layer. On this shield capactiors of 68 nF are mounted.  C6/C8: These ceramic capacitors are important for EMI. Good results have been achieved with a value of 220 nF. In terms of layout, it is important to place these capacitors between “OUT” and “Vs” without significant additional wiring from C6/C8 to the Vs- and OUT-line. These capacitors are not mounted on this shield.  C5/C2: These ceramic capacitor help to improve the EMC immunity and the ESD performance of the application. Good results have been achieved with a value of 220 nF. To keep the EMC and ESD out of the board, the capacitor is most effective when positioned directly next to the board connector. In addition, the parasitic inductance could be kept low by placing at least two vias for the connection to the GND-layer. These capacitors are not mounted on this shield.  User Manual 8 Rev. 1.0 2021-01-21 Motor Control Shield for Arduino with BTN7030-1EPA 3 BTN7030-1EPA overview The BTN7030-1EPA used in the Motor Control Shield is an integrated high current half-bridge for motor drive applications. Interfacing to a microcontroller is made easy by the integrated driver IC which features logic level inputs, diagnosis with current sense, dead time generation, short circuit detection and protection against overtemperature, undervoltage, overcurrent and cross current. The BTN7030-1EPA provides a cost optimized solution targeting low power (