DRV10975 Datasheet, PDF (47/57 Pages) Texas Instruments – 12-V, Three-Phase, Sensorless BLDC Motor Driver

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DRV10975
SLVSCP2 – JANUARY 2015
11 Power Supply Recommendations
The DRV10975 is designed to operate from an input voltage supply, V_(VCC), range between 6.5 and 18 V. The
user must place a 10-µF ceramic capacitor rated for VCC as close as possible to the VCC and GND pin.
If the power supply ripple is more than 200 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 1 µF.
12 Layout
12.1 Layout Guidelines
• Place VCC, GND, U, V, and W pins with thick traces because high current passes through these traces.
• Place the 10-µF capacitor between VCC and GND, and as close to the VCC and GND pins as possible.
• Place the capacitor between CPP and CPN, and as close to the CPP and CPN pins as possible.
• Connect the GND, PGND, and SWGND 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.
12.2 Layout Example
0.1 µF
VCP
0.1 µF
47 µH
CPP
CPN
SW
10 µF
SWGND
VREG
1 µF
V1P8
4.7 kO1 ^µF
4.7 kO
GND
V3P3
4.7 kO
SCL
SDA
FG
10 µF
VCC
VCC
W
W
V
V
U
U
PGND
PGND
DIR
SPEED
Figure 42. Layout Schematic
Copyright © 2015, Texas Instruments Incorporated
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