ZHCSR67 July 2020 DRV8353M
PRODUCTION DATA
- 1 特性
- 2 應用
- 3 說明
- 4 Revision History
- 5 Device Comparison Table
- 6 Pin Configuration and Functions
- 7 Absolute Maximum Ratings
- 8 ESD Ratings
- 9 Recommended Operating Conditions
- 10Thermal Information
- 11Electrical Characteristics
- 12SPI Timing Requirements
-
13Detailed Description
- 13.1 Overview
- 13.2 Functional Block Diagram
- 13.3
Feature Description
- 13.3.1 Three Phase Smart Gate Drivers
- 13.3.2 DVDD Linear Voltage Regulator
- 13.3.3 Pin Diagrams
- 13.3.4 Low-Side Current-Shunt Amplifiers
- 13.3.5
Gate Driver Protective Circuits
- 13.3.5.1 VM Supply and VDRAIN Undervoltage Lockout (UVLO)
- 13.3.5.2 VCP Charge-Pump and VGLS Regulator Undervoltage Lockout (GDUV)
- 13.3.5.3 MOSFET VDS Overcurrent Protection (VDS_OCP)
- 13.3.5.4 VSENSE Overcurrent Protection (SEN_OCP)
- 13.3.5.5 Gate Driver Fault (GDF)
- 13.3.5.6 Overcurrent Soft Shutdown (OCP Soft)
- 13.3.5.7 Thermal Warning (OTW)
- 13.3.5.8 Thermal Shutdown (OTSD)
- 13.3.5.9 Fault Response Table
- 13.4 Device Functional Modes
- 13.5 Programming
- 13.6
Register Maps
- 13.6.1 Status Registers
- 13.6.2
Control Registers
- 13.6.2.1 Driver Control Register (address = 0x02h)
- 13.6.2.2 Gate Drive HS Register (address = 0x03h)
- 13.6.2.3 Gate Drive LS Register (address = 0x04h)
- 13.6.2.4 OCP Control Register (address = 0x05h)
- 13.6.2.5 CSA Control Register (address = 0x06h)
- 13.6.2.6 Driver Configuration Register (address = 0x07h)
-
14Application and Implementation
- 14.1 Application Information
- 14.2
Typical Application
- 14.2.1
Primary Application
- 14.2.1.1 Design Requirements
- 14.2.1.2 Detailed Design Procedure
- 14.2.1.3 Application Curves
- 14.2.1
Primary Application
- 15Power Supply Recommendations
- 16Layout
- 17Device and Documentation Support
- 18Mechanical, Packaging, and Orderable Information
15.1 Bulk Capacitance Sizing
Having appropriate local bulk capacitance is an important factor in motor drive system design. It is usually beneficial to have more bulk capacitance, while the disadvantages are increased cost and physical size. The amount of local capacitance depends on a variety of factors including:
- The highest current required by the motor system
- The power supply's type, capacitance, and ability to source current
- The amount of parasitic inductance between the power supply and motor system
- The acceptable supply voltage ripple
- Type of motor (brushed DC, brushless DC, stepper)
- The motor startup and braking methods
The inductance between the power supply and motor drive system will limit the rate current can change from the power supply. If the local bulk capacitance is too small, the system will respond to excessive current demands or dumps from the motor with a change in voltage. When adequate bulk capacitance is used, the motor voltage stays stable and high current can be quickly supplied.
The data sheet provides a recommended minimum value, but system level testing is required to determine the appropriate sized bulk capacitor.
Figure 15-1 Motor Drive Supply Parasitics Example