SLOSE48
December 2020
DRV8434A
PRODUCTION DATA
1
Features
2
Applications
3
Description
4
Revision History
5
Pin Configuration and Functions
5.1
Pin 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
Indexer Timing Requirements
6.6.1
Typical Characteristics
7
Detailed Description
7.1
Overview
7.2
Functional Block Diagram
7.3
Feature Description
7.3.1
Stepper Motor Driver Current Ratings
7.3.1.1
Peak Current Rating
7.3.1.2
RMS Current Rating
7.3.1.3
Full-Scale Current Rating
7.3.2
PWM Motor Drivers
7.3.3
Microstepping Indexer
7.3.4
Controlling VREF with an MCU DAC
7.3.5
Current Regulation and Decay Mode
7.3.5.1
Smart tune Ripple Control
7.3.5.2
Blanking Time
7.3.6
Charge Pump
7.3.7
Linear Voltage Regulators
7.3.8
Logic Level, tri-level and quad-level Pin Diagrams
7.3.8.1
nFAULT Pin
7.3.9
Protection Circuits
7.3.9.1
VM Undervoltage Lockout (UVLO)
7.3.9.2
VCP Undervoltage Lockout (CPUV)
7.3.9.3
Overcurrent Protection (OCP)
7.3.9.4
Stall Detection
7.3.9.5
Open-Load Detection (OL)
7.3.9.6
Thermal Shutdown (OTSD)
Fault Condition Summary
7.4
Device Functional Modes
7.4.1
Sleep Mode (nSLEEP = 0)
43
7.4.2
Disable Mode (nSLEEP = 1, ENABLE = 0)
7.4.3
Operating Mode (nSLEEP = 1, ENABLE = Hi-Z/1)
7.4.4
nSLEEP Reset Pulse
Functional Modes Summary
8
Application and Implementation
8.1
Application Information
8.2
Typical Application
8.2.1
Design Requirements
8.2.2
Detailed Design Procedure
8.2.2.1
Stepper Motor Speed
8.2.2.2
Current Regulation
8.2.2.3
Decay Mode
8.2.2.4
Application Curves
8.2.2.5
Thermal Application
8.2.2.5.1
Power Dissipation
8.2.2.5.2
Conduction Loss
8.2.2.5.3
Switching Loss
8.2.2.5.4
Power Dissipation Due to Quiescent Current
8.2.2.5.5
Total Power Dissipation
8.2.2.5.6
Device Junction Temperature Estimation
9
Power Supply Recommendations
9.1
Bulk Capacitance
10
Layout
10.1
Layout Guidelines
10.2
Layout Example
11
Device and Documentation Support
11.1
Receiving Notification of Documentation Updates
11.2
Support Resources
11.3
Trademarks
11.4
Electrostatic Discharge Caution
11.5
Glossary
12
Mechanical, Packaging, and Orderable Information
Package Options
Mechanical Data (Package|Pins)
RGE|24
MPQF124G
PWP|28
MPDS373B
Thermal pad, mechanical data (Package|Pins)
RGE|24
QFND008AA
Orderable Information
slose48_oa
8.2.2.4
Application Curves
Figure 8-3
1/8 Microstepping With smart tune Ripple Control Decay
Figure 8-5
1/32 Microstepping With smart tune Ripple Control Decay
Figure 8-7
1/256 Microstepping With smart tune Ripple Control Decay
Figure 8-4
1/8 Microstepping With smart tune Dynamic Decay
Figure 8-6
1/32 Microstepping With smart tune Dynamic Decay
Figure 8-8
1/256 Microstepping With smart tune Dynamic Decay