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DRV8256 데이터시트(PDF) 27 Page - Texas Instruments |
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DRV8256 데이터시트(HTML) 27 Page - Texas Instruments |
27 / 48 page 8 Application and Implementation Note Information in the following applications sections is not part of the TI component specification, and TI does not warrant its accuracy or completeness. TI’s customers are responsible for determining suitability of components for their purposes. Customers should validate and test their design implementation to confirm system functionality. 8.1 Application Information The DRV8256E/P devices can be used in a variety of applications that require a H-bridge power stage configuration. Common application examples include brushed DC motors. The application examples below will highlight how to use the device in bidirectional current control applications requiring an H-bridge driver. 8.2 Typical Application In this application example, the device is configured to drive a bidirectional current through a brushed DC motor using an H-bridge configuration. The H-bridge polarity and duty cycle are controlled with a PWM and IO resource from the external controller to the IN1 and IN2 pins. The current limit threshold (ITRIP) is generated with a resistor divider from the VREF pin. The device is configured for the smart tune ripple control decay by tying the DECAY pin to DVDD. Figure 8-1. Typical Application Schematic 8.2.1 Design Requirements Table 8-1 lists the design input parameters for system design. Table 8-1. Design Parameters DESIGN PARAMETER REFERENCE EXAMPLE VALUE Supply Voltage VM 24 V Output RMS Current IRMS 3.5 A Current Regulation Trip Point ITRIP 4 A Switching Frequency fPWM 35 kHz www.ti.com DRV8256 SLOSE50 – DECEMBER 2020 Copyright © 2020 Texas Instruments Incorporated Submit Document Feedback 27 Product Folder Links: DRV8256 |
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