ZHCSIN3A August 2018 – June 2019 DRV8350 , DRV8350R , DRV8353 , DRV8353R
PRODUCTION DATA.
- 1 特性
- 2 應用
- 3 說明
- 4 修訂歷史記錄
- 5 Device Comparison Table
- 6 Pin Configuration and Functions
- 7 Specifications
-
8 Detailed Description
- 8.1 Overview
- 8.2 Functional Block Diagram
- 8.3
Feature Description
- 8.3.1 Three Phase Smart Gate Drivers
- 8.3.2 DVDD Linear Voltage Regulator
- 8.3.3 Pin Diagrams
- 8.3.4 Low-Side Current-Shunt Amplifiers (DRV8353 and DRV8353R Only)
- 8.3.5 Step-Down Buck Regulator
- 8.3.6
Gate Driver Protective Circuits
- 8.3.6.1 VM Supply and VDRAIN Undervoltage Lockout (UVLO)
- 8.3.6.2 VCP Charge-Pump and VGLS Regulator Undervoltage Lockout (GDUV)
- 8.3.6.3 MOSFET VDS Overcurrent Protection (VDS_OCP)
- 8.3.6.4 VSENSE Overcurrent Protection (SEN_OCP)
- 8.3.6.5 Gate Driver Fault (GDF)
- 8.3.6.6 Overcurrent Soft Shutdown (OCP Soft)
- 8.3.6.7 Thermal Warning (OTW)
- 8.3.6.8 Thermal Shutdown (OTSD)
- 8.3.6.9 Fault Response Table
- 8.4 Device Functional Modes
- 8.5 Programming
- 8.6
Register Maps
- 8.6.1 Status Registers
- 8.6.2
Control Registers
- 8.6.2.1 Driver Control Register (address = 0x02h)
- 8.6.2.2 Gate Drive HS Register (address = 0x03h)
- 8.6.2.3 Gate Drive LS Register (address = 0x04h)
- 8.6.2.4 OCP Control Register (address = 0x05h)
- 8.6.2.5 CSA Control Register (DRV8353 and DRV8353R Only) (address = 0x06h)
- 8.6.2.6 Driver Configuration Register (DRV8353 and DRV8353R Only) (address = 0x07h)
-
9 Application and Implementation
- 9.1 Application Information
- 9.2
Typical Application
- 9.2.1
Primary Application
- 9.2.1.1 Design Requirements
- 9.2.1.2
Detailed Design Procedure
- 9.2.1.2.1 External MOSFET Support
- 9.2.1.2.2 IDRIVE Configuration
- 9.2.1.2.3 VDS Overcurrent Monitor Configuration
- 9.2.1.2.4 Sense-Amplifier Bidirectional Configuration (DRV8353 and DRV8353R)
- 9.2.1.2.5 Single Supply Power Dissipation
- 9.2.1.2.6 Single Supply Power Dissipation Example
- 9.2.1.2.7 Buck Regulator Configuration (DRV8350R and DRV8353R)
- 9.2.1.3 Application Curves
- 9.2.2 Alternative Application
- 9.2.1
Primary Application
- 10Power Supply Recommendations
- 11Layout
- 12器件和文檔支持
- 13機械、封裝和可訂購信息
10.1 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 74. Motor Drive Supply Parasitics Example