DRV10987 Datasheet, PDF (63/69 Pages) Texas Instruments – DRV10987 12- to 24-V, Three-Phase, Sensorless BLDC Motor Driver

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DRV10987
SLVSE89 – AUGUST 2017
10 Power Supply Recommendations
The DRV10987 device is designed to operate from an input voltage supply, V_CC, in a range between 8 V and 28
V. The user must place a 10-µF ceramic capacitor rated for V_CC as close as possible to the V_CC and GND pins.
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.
11 Layout
11.1 Layout Guidelines
• Place the V_CC, GND, U, V, and W pins with thick traces because high current passes through these traces.
• Place the 10-µF capacitor between V_CC and GND, and as close to the V_CC and GND pins as possible.
• Place the capacitor between CPP and CPN, and as close to the CPP and CPN pins as possible.
• Connect GND, PGND, and SWGND under the thermal pad.
• Keep the thermal pad connection as large as possible, on both the bottom side and top sides. It should be
one piece of copper without any gaps.
11.2 Layout Example
C_VCC (10 µF)
C_VCP (0.1 µF)
VCP
C_CP (10 nF)
L_{SW_VREG} (47 µH)
C_VREG (10 µF)
CPP
CPN
SW
SWGND
VREG
C_V1P8 (1 µF)
V1P8
GND
C_V3P3 (1 µF)
V3P3
R_SCL (4.75 kW)
SCL
R_SDA (4.75 kW)
SDA
R_FG (4.75 kW)
FG
VCC
VCC
W
W
V
V
U
U
PGND
PGND
DIR
SPEED
Figure 69. Layout Diagram
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