SLVSCF7B
February 2014 – November 2017
DRV8308
PRODUCTION DATA.
1
Features
2
Applications
3
Description
4
Revision History
5
Pin Configurations and Functions
6
Specifications
6.1
Absolute Maximum Ratings
6.2
Handling Ratings
6.3
Recommended Operating Conditions
6.4
Thermal Information
6.5
Electrical Characteristics
6.6
SPI Timing Requirements
6.7
Typical Characteristics
7
Detailed Description
7.1
Overview
7.2
Functional Block Diagram
7.3
Feature Description
7.3.1
Hall Comparators
7.3.2
FG Amplifier, Comparator, and FG Output
7.3.3
Enable, Reset, and Clock Generation
7.3.4
Commutation
7.3.4.1
120° 3-Hall Commutation
7.3.4.2
120° Single-Hall Commutation
7.3.4.3
180° Sine-Wave-Drive Commutation
7.3.5
Commutation Logic Block Diagram
7.3.6
Commutation Parameters
7.3.7
Braking
7.3.8
Output Pre-Drivers
7.3.9
Current Limit
7.3.10
Charge Pump
7.3.11
5-V Linear Regulator
7.3.12
Power Switch
7.3.13
Protection Circuits
7.3.13.1
VM Undervoltage Lockout (UVLO)
7.3.13.2
VM Overvoltage (VMOV)
7.3.13.3
Motor Overcurrent (OCP)
7.3.13.4
Charge Pump Failure (CPFAIL)
7.3.13.5
Charge Pump Short (CPSC)
7.3.13.6
Overtemperature (OTS)
7.4
Device Functional Modes
7.4.1
Modes of Speed Input
7.4.1.1
Clock Frequency Mode
7.4.1.2
Clock PWM and Internal Register PWM Modes
7.4.2
Auto Gain and Advance Compensation
7.4.3
External EEPROM Mode
7.5
Programming
7.5.1
Serial Interface
7.5.2
Serial Data Format
7.5.3
Programming the OTP Configuration Memory
7.6
Register Map
7.6.1
Control Registers
8
Application and Implementation
8.1
Application Information
8.1.1
Internal Speed Control Loop Constraints
8.1.2
Hall Sensor Configurations and Connections
8.1.3
FG Amplifier Configurations and Connections
8.2
Typical Application
8.2.1
Design Requirements
8.2.2
Detailed Design Procedure
8.2.2.1
Motor voltage
8.2.2.2
Motor Current (Peak and RMS)
8.2.2.3
Speed Command Method
8.2.2.4
Required Flutter (Speed Jitter)
8.2.2.5
Configuration Method
8.2.2.6
Hall Element Current
8.2.2.7
Power FET Switching Time
8.2.3
Application Curves
8.3
Do's and Don'ts
8.3.1
RESET and ENABLE Considerations
9
Power Supply Recommendations
10
Layout
10.1
Layout Guidelines
10.2
Layout Example
11
Device and Documentation Support
11.1
Documentation Support
11.1.1
Related Documentation
11.2
Receiving Notification of Documentation Updates
11.3
Community Resources
11.4
Trademarks
11.5
Electrostatic Discharge Caution
11.6
Glossary
12
Mechanical, Packaging, and Orderable Information
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)
RHA|40
MPQF135D
サーマルパッド・メカニカル・データ
RHA|40
QFND227K
発注情報
slvscf7b_oa
slvscf7b_pm