User manual

Motor Control Shield with BTN8982TA

for Arduino

Users Manual 10 V0.9, 2015-03

 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 value of these ceramic capacitors must be chosen

so that fast Vs-ripples at the NovalithIC™ do not exceed 1V peak to peak. The layout wiring for C1/C3

must be shorter than for C4 to the NovalithIC™ 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.

 C6/C8: These ceramic capacitors are important for EMI in order to avoid entering RF into the NovalithIC™

as much as possible. 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.

 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.

Other components:

 IC0, D1 and R8: Reverse polarity protection. See Chapter 4.4 of the Applikation Note.

 R9/R6: Slew rate resistors according to data sheet.

 C11/C12: Stabilization for slew rate resistors (R9/R6).

 R7/R4: Resistors to generate a current sensing voltage from the IS current.

 C10/C9: Ceramic capacitors for EMC immunity improvement. GND connection with at least two GND-

vias. A good value is 1nF. In case the current should be measured during the PWM-phase this capacitor

must be adapted to the ON-time inside the PWM-phase.

 R1, R2, R3 and R5: Device protection in case of microcontroller pins shorted to Vs.

2.4 Pin assignment

To use the Motor Control Shield the necessary control signals can be applied directly at the Arduino

connectors. There is no need to use an Arduino or XMC 1100 Boot Kit to get the Motor Control Shield into an

application. The control pins are logic level inputs which can be driven by any other microcontroller or with

logic level signals. Besides the supply voltage Vbat has to be provided to the Vbat connector. Figure 8 shows

the pinout/connectors of the Motor Control Shield.