ZHCSG01C February 2017 – August 2018 DRV8320 , DRV8320R , DRV8323 , DRV8323R
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 Sense Amplifiers (DRV8323 and DRV8323R Only)
- 8.3.5 Step-Down Buck Regulator
- 8.3.6 Gate Driver Protective Circuits
- 8.4 Device Functional Modes
- 8.5 Programming
- 8.6
Register Maps
- Table 1. DRV832xS and DRV832xRS Register Map
- 8.6.1 Status Registers
- 8.6.2 Control Registers
-
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
- 9.2.1.3 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
8.3.2 DVDD Linear Voltage Regulator
A 3.3-V, 30-mA linear regulator is integrated into the DRV832x family of devices and is available for use by external circuitry. This regulator can provide the supply voltage for a low-power MCU or other circuitry supporting low current. The output of the DVDD regulator should be bypassed near the DVDD pin with a X5R or X7R, 1-µF, 6.3-V ceramic capacitor routed directly back to the adjacent AGND ground pin.
The DVDD nominal, no-load output voltage is 3.3 V. When the DVDD load current exceeds 30 mA, the regulator functions like a constant-current source. The output voltage drops significantly with a current load greater than 30 mA.
Figure 30. DVDD Linear Regulator Block Diagram Use Equation 1 to calculate the power dissipated in the device by the DVDD linear regulator.
For example, at a VVM of 24 V, drawing 20 mA out of DVDD results in a power dissipation as shown in Equation 2.
