User Manual
7
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
. 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 VS-
pin low during switching operation. It is usually recommended that the voltage ripple at the Vs-pin to the GND-
pin 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.
𝐶
𝐷𝐶−𝐿𝑖𝑛𝑘
=
𝐼
𝑛𝑜𝑚
∗ 𝑇
𝑃𝑊𝑀
∗ 𝑑𝑢𝑡𝑦_𝑐𝑦𝑐𝑙𝑒
∆𝑉
𝑆
=
7𝐴 ∗ 0.00025𝑠 (1𝑘𝐻𝑧) ∗ 0.5(50%)
1𝑉
= 875𝑢𝐹
