SLVSHO3
April 2024
DRV8235
PRODUCTION DATA
1
1
Features
2
Applications
3
Description
4
Device Comparison
5
Pin Configuration and Functions
6
Specifications
6.1
Absolute Maximum Ratings
6.2
ESD Ratings
6.3
Recommended Operating Conditions
6.4
Thermal Information
6.5
Electrical Characteristics
6.6
I2C Timing Requirements
6.7
Timing Diagrams
6.8
Typical Operating Characteristics
7
Detailed Description
7.1
Overview
7.2
Functional Block Diagram
7.3
Feature Description
7.3.1
External Components
7.3.2
Summary of Features
7.3.3
Bridge Control
7.3.4
Current Sense and Regulation (IPROPI)
7.3.4.1
Current Sensing
7.3.4.2
Current Regulation
7.3.4.2.1
Fixed Off-Time Current Regulation
7.3.4.2.2
Cycle-By-Cycle Current Regulation
7.3.5
Stall Detection
7.3.6
Motor Voltage and Speed Regulation
7.3.6.1
Internal Bridge Control
7.3.6.2
Setting Speed/Voltage Regulation Parameters
7.3.6.2.1
Speed and Voltage Set
7.3.6.2.2
Speed Scaling Factor
7.3.6.2.2.1
Target Speed Setting Example
7.3.6.2.3
Motor Resistance Inverse
7.3.6.2.4
Motor Resistance Inverse Scale
7.3.6.2.5
KMC Scaling Factor
7.3.6.2.6
KMC
7.3.6.2.7
VSNS_SEL
7.3.6.3
Soft-Start and Soft-Stop
7.3.6.3.1
TINRUSH
7.3.7
Protection Circuits
7.3.7.1
Overcurrent Protection (OCP)
7.3.7.2
Thermal Shutdown (TSD)
7.3.7.3
VM Undervoltage Lockout (VM UVLO)
7.3.7.4
Overvoltage Protection (OVP)
7.3.7.5
nFAULT Output
7.4
Device Functional Modes
7.4.1
Active Mode
7.4.2
Low-Power Sleep Mode
7.4.3
Fault Mode
7.5
Programming
7.5.1
I2C Communication
7.5.1.1
I2C Write
7.5.1.2
I2C Read
8
Register Map
8.1
DRV8235_STATUS Registers
8.2
DRV8235_CONFIG Registers
8.3
DRV8235_CTRL Registers
9
Application and Implementation
9.1
Application Information
9.2
Typical Application: Brushed DC Motor
9.2.1
Design Requirements
9.2.2
Stall Detection
9.2.2.1
Application Description
9.2.2.1.1
Stall Detection Timing
9.2.2.1.2
Hardware Stall Threshold Selection
9.2.3
Motor Speed and Voltage Regulation Application
9.2.3.1
Tuning Parameters
9.2.3.1.1
Resistance Parameters
9.2.3.1.2
KMC and KMC_SCALE
9.2.3.1.2.1
Case I
9.2.3.1.2.2
Case II
9.2.3.1.2.2.1
Method 1: Tuning from Scratch
9.2.3.1.2.2.1.1
Tuning KMC_SCALE
9.2.3.1.2.2.1.2
Tuning KMC
9.2.3.1.2.2.2
Method 2: Using the Proportionality factor
9.2.3.1.2.2.2.1
Working Example
9.2.4
Motor Voltage
9.2.5
Motor Current
9.3
Power Supply Recommendations
9.3.1
Bulk Capacitance
9.4
Layout
9.4.1
Layout Guidelines
10
Device and Documentation Support
10.1
Receiving Notification of Documentation Updates
10.2
Support Resources
10.3
Trademarks
10.4
Electrostatic Discharge Caution
10.5
Glossary
11
Revision History
12
Mechanical, Packaging, and Orderable Information
封装选项
机械数据 (封装 | 引脚)
RTE|16
MPQF149D
散热焊盘机械数据 (封装 | 引脚)
RTE|16
QFND525B
订购信息
slvsho3_oa
slvsho3_pm
Data Sheet
DRV8235 38V 3.7A Brushed DC Motor Driver with Integrated Speed Regulation and Stall Detection
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