JAJSSJ5
December 2023
DRV8234
PRODUCTION DATA
1
1
特長
2
アプリケーション
3
概要
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
Ripple Counting
7.3.6.1
Ripple Counting Parameters
7.3.6.1.1
Motor Resistance Inverse
7.3.6.1.2
Motor Resistance Inverse Scale
7.3.6.1.3
KMC Scaling Factor
7.3.6.1.4
KMC
7.3.6.1.5
Filter Damping Constant
7.3.6.1.6
Filter Input Scaling Factor
7.3.6.1.7
Ripple Count Threshold
7.3.6.1.8
Ripple Count Threshold Scale
7.3.6.1.9
T_MECH_FLT
7.3.6.1.10
VSNS_SEL
7.3.6.1.11
Error Correction
7.3.6.1.11.1
EC_FALSE_PER
7.3.6.1.11.2
EC_MISS_PER
7.3.6.2
RC_OUT Output
7.3.6.3
Ripple Counting with nFAULT
7.3.7
Motor Voltage and Speed Regulation
7.3.7.1
Internal Bridge Control
7.3.7.2
Setting Speed/Voltage Regulation Parameters
7.3.7.2.1
Speed and Voltage Set
7.3.7.2.2
Speed Scaling Factor
7.3.7.3
Soft-Start and Soft-Stop
7.3.7.3.1
TINRUSH
7.3.8
Protection Circuits
7.3.8.1
Overcurrent Protection (OCP)
7.3.8.2
Thermal Shutdown (TSD)
7.3.8.3
VM Undervoltage Lockout (VM UVLO)
7.3.8.4
Overvoltage Protection (OVP)
7.3.8.5
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
7.6
Register Map
7.6.1
DRV8234_STATUS Registers
7.6.2
DRV8234_CONFIG Registers
7.6.3
DRV8234_CTRL Registers
8
Application and Implementation
8.1
Application Information
8.2
Typical Application: Brushed DC Motor
8.2.1
Design Requirements
8.2.2
Stall Detection
8.2.2.1
Application Description
8.2.2.1.1
Stall Detection Timing
8.2.2.1.2
Hardware Stall Threshold Selection
8.2.3
Ripple Counting Application
8.2.3.1
Tuning Ripple Counting Parameters
8.2.3.1.1
Resistance Parameters
8.2.3.1.2
KMC and KMC_SCALE
8.2.3.1.2.1
Case I
8.2.3.1.2.2
Case II
8.2.3.1.2.2.1
Method 1: Tuning from Scratch
8.2.3.1.2.2.1.1
Tuning KMC_SCALE
8.2.3.1.2.2.1.2
Tuning KMC
8.2.3.1.2.2.2
Method 2: Using the Proportionality factor
8.2.3.1.2.2.2.1
Working Example
8.2.3.1.3
Advanced Parameters
8.2.3.1.3.1
Filter Constants
8.2.3.1.3.1.1
FLT_GAIN_SEL
8.2.3.1.3.1.2
FLT_K
8.2.3.1.3.2
T_MECH_FLT
8.2.3.1.3.3
VSNS_SEL
8.2.3.1.3.4
Additional Error Corrector Parameters
8.2.3.1.3.4.1
EC_FALSE_PER
8.2.3.1.3.4.2
EC_MISS_PER
8.2.4
Motor Voltage
8.2.5
Motor Current
8.2.6
Application Curves
9
Power Supply Recommendations
9.1
Bulk Capacitance
10
Layout
10.1
Layout Guidelines
11
Device and Documentation Support
11.1
ドキュメントの更新通知を受け取る方法
11.2
サポート・リソース
11.3
Trademarks
11.4
静電気放電に関する注意事項
11.5
用語集
12
Revision History
パッケージ・オプション
メカニカル・データ(パッケージ|ピン)
RTE|16
MPQF149D
サーマルパッド・メカニカル・データ
RTE|16
QFND525B
発注情報
jajssj5_oa
jajssj5_pm
7.5
Programming