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DRV8320 Datasheet, PDF (60/80 Pages) Texas Instruments – 6 to 60-V Three-Phase Smart Gate Driver
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DRV8320, DRV8320R
DRV8323, DRV8323R
SLVSDJ3 – FEBRUARY 2017
Typical Application (continued)
9.2.1.1 Design Requirements
Table 19 lists the example input parameters for the system design.
EXAMPLE DESIGN PARAMETER
Nominal supply voltage
Supply voltage range
MOSFET part number
MOSFET total gate charge
MOSFET gate to drain charge
Target output rise time
Target output fall time
PWM Frequency
Buck regulator output voltage
Maximum motor current
ADC reference voltage
Winding sense current range
Motor RMS current
Sense resistor power rating
System ambient temperature
Table 19. Design Parameters
REFERENCE
VVM
Qg
Qgd
tr
tf
ƒPWM
VVCC
Imax
VVREF
ISENSE
IRMS
PSENSE
TA
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EXAMPLE VALUE
24 V
8 V to 45 V
CSD18536KCS
83 nC (typical) at VVGS = 10 V
14 nC (typical)
100 to 300 ns
50 to 150 ns
45 kHz
3.3 V
100 A
3.3 V
–40 A to +40 A
28.3 A
2W
–20°C to +105°C
9.2.1.2 Detailed Design Procedure
Table 20 lists the recommended values of the external components for the gate driver. Table 21 lists the
recommended values of the external components for the buck regulator.
Table 20. DRV832x Gate-Driver External Components
COMPONENTS
CVM1
CVM2
CVCP
CSW
CDVDD
RnFAULT
RSDO
RIDRIVE
RVDS
RMODE
RGAIN
CVREF
RASENSE
RBSENSE
RCSENSE
PIN 1
VM
VM
VCP
CPH
DVDD
VCC (1)
VCC (1)
IDRIVE
VDS
MODE
GAIN
VREF
SPA
SPB
SPC
PIN 2
PGND
PGND
VM
CPL
AGND
nFAULT
SDO
AGND or DVDD
AGND or DVDD
AGND or DVDD
AGND or DVDD
AGND or DGND
SNA and PGND
SNB and PGND
SNC and PGND
RECOMMENDED
X5R or X7R, 0.1-µF, VM-rated capacitor
≥ 10 µF, VM-rated capacitor
X5R or X7R, 16-V, 1-µF capacitor
X5R or X7R, 47-nF, VM-rated capacitor
X5R or X7R, 1-µF, 6.3-V capacitor
Pullup resistor
Pullup resistor
DRV832x hardware interface
DRV832x hardware interface
DRV832x hardware interface
DRV832x hardware interface
Optional capacitor rated for VREF
Sense shunt resistor
Sense shunt resistor
Sense shunt resistor
(1) The VCC pin is not a pin on the DRV832x family of devices, but a VCC supply voltage pullup is required for the open-drain output
nFAULT and SDO. These pins can also be pulled up to DVDD.
60
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