DRV10866_15 Datasheet, PDF (14/22 Pages) Texas Instruments – 5V, 3Phase, Sensorless BLDC Motor Driver

DRV10866
SBVS206A – NOVEMBER 2012 – REVISED MARCH 2015
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9 Power Supply Recommendations
The DRV10866 is designed to operate from an input voltage supply, VCC, range from 1.65 V to 5.5 V. The user
must place a 2.2-μF ceramic capacitor rated for VCC as close as possible to the VCC and GND pin. If the power
supply ripple is more than 100 mV, in addition to the local decoupling capacitors, a bulk capacitance is required
and must be sized according to the application requirements. If the bulk capacitance is implemented in the
application, the user can reduce the value of the local ceramic capacitor to 220 nF.
10 Layout
10.1 Layout Guidelines
The DRV10866 is simple to design with a single-layer or two layer printed-circuit-board (PCB) layout. During
layout, the strategy of ground copper pour is very important to enhance the thermal performance. Use vias on
the thermal pad to dissipate heat away from the IC. Refer to Figure 18 for an example of PCB layout.
• Place VCC, GND, U, V, and W pins with thick traces because high current passes through these traces.
• Place the 2.2-μF capacitor between VCC and GND, and as close to the VCC and GND pins as possible.
• Connect the GND under the thermal pad.
• Keep the thermal pad connection as large as possible, both on the bottom side and top side. It should be one
piece of copper without any gaps.
10.2 Layout Example
Figure 18. PCB Layout Example
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