DRV8848_15 Datasheet, PDF (16/28 Pages) Texas Instruments – DRV8848 Dual H-Bridge Motor Driver

DRV8848
SLLSEL7 – OCTOBER 2014
9 Application and Implementation
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NOTE
Information in the following applications sections is not part of the TI component
specification, and TI does not warrant its accuracy or completeness. TI’s customers are
responsible for determining suitability of components for their purposes. Customers should
validate and test their design implementation to confirm system functionality.
9.1 Application Information
The DRV8848 is used in stepper or brushed DC motor control. The user can configure the DRV8848 with the
following design procedure.
9.2 Typical Application
1 _nSLEEP
2 _AOUT1
DCM
500 PŸ
3 _AISEN
4 _AOUT2
5 _BOUT2
DCM
500 PŸ _{6 BISEN}
7 _BOUT1
8 _nFAULT
VCC
logic supply
10 NŸ
DRV8848
GND
(PPAD)
AIN1 ¹⁶
AIN2 ¹⁵
VINT ¹⁴
GND ¹³
VM ¹²
2.2 µF
10 µF
VREF ¹¹
BIN2 ¹⁰
BIN1 ⁹
0.1 µF
VM
Figure 10. Typical Application Schematic
9.2.1 Design Requirements
Table 4 gives design input parameters for system design.
Design Parameter
Nominal supply voltage
Supply voltage range
Motor winding resistance
Motor winding inductance
Target chopping current
Chopping current reference voltage
Table 4.
Reference
V_VM
R_L
L_L
I_CHOP
V_VREF
Example Value
12 V
4 to 18 V
3 Ω/phase
330 µH/phase
500 mA
3.3 V
16
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