The following Figure shows how two DRV81646 devices can be connected in daisy chain to leverage GPIO/ isolation saving. SDO pin of one device is fed to the SDI pin of the following device in the chain
To write to two devices , 8 bits of data need to be written as shown in Figure . Note SDO is sent out on Negedge of SCLK. SDO is ready to be sampled on following posedge of SCLK. The value on SDI pin is also sampled on posedge of SCLK. Note Latch need not be brought low to initiate a shift in of data. A posedge of Latch is needed to Latch the data shifted in to Outputs.
The DRV8804 provides a 4-channel low-side driver with overcurrent protection. The device has built-in diodes to clamp turnoff transients generated by inductive loads and can be used to drive unipolar stepper motors, DC motors, relays, solenoids, or other loads.
In the SOIC (DW) package, the DRV8804 can supply up to 1.5A (one channel on) or 800mA (all channels on) continuous output current per channel, at 25°C. In the HTSSOP (PWP) package, the device can supply up to 2A (one channel on) or 1A (four channels on) continuous output current per channel, at 25°C . In the SOT-23-THN (DYZ) package, the DRV8804 can supply up to 1.9A (one channel on) or 900mA (all channels on) continuous output current per chanel, at 25°C with proper PCB heatsinking.
A serial interface is provided including a serial data output, which can be daisy-chained to control multiple devices with one serial interface.
Internal shutdown functions are provided for overcurrent protection, short-circuit protection, undervoltage lockout, and overtemperature, and faults are indicated by a fault output pin.
The DRV8804 is available in a 20-pin, thermally-enhanced SOIC package , 16-pin HTSSOP package and 16-pin SOT-23-THN package (Eco-friendly: RoHS & no Sb/Br).
| Top documentation | Type | Title | Format options | Date |
|---|---|---|---|---|
| * | Data sheet | DRV8804 Quad Serial Interface Low-Side Driver IC datasheet (Rev. G) | PDF | HTML | Dec 10, 2024 |
| Application note | Understanding Motor Driver Current Ratings (Rev. A) | PDF | HTML | Jul 5, 2024 | |
| Application note | Using DRV to Drive Solenoids (Rev. A) | PDF | HTML | Apr 24, 2022 | |
| Application note | How to Drive Unipolar Stepper Motor with the DRV8xxx | PDF | HTML | Dec 3, 2021 | |
| Application note | Best Practices for Board Layout of Motor Drivers (Rev. B) | PDF | HTML | Oct 14, 2021 | |
| Application note | Calculating Power Dissipation for a H-Bridge or Half Bridge Driver (Rev. A) | PDF | HTML | Jul 22, 2021 | |
| Technical article | Drive unipolar stepper motors as bipolar stepper motors with a simple wiring recon | PDF | HTML | Apr 9, 2020 | |
| Application note | PowerPAD™ Thermally Enhanced Package (Rev. H) | Jul 6, 2018 | ||
| More literature | TM4C123x Stepper Motor Control Product Summary | Jul 6, 2015 | ||
| Application brief | PowerPAD™ Made Easy (Rev. B) | May 12, 2004 |
For additional terms or required resources, click any title below to view the detail page where available.
The DRV8804 evaluation module consists of a quad low-side motor driver with serial control interface that can be used to drive a unipolar stepper motor, up to 4 DC motors or other loads like solenoids. With the DRV8804EVM, designers can quickly and easily evaluate the performance of DRV8804 motor (...)
Digital Output Modules are a standard component in a PLC/PAC or DCS to control actuators, motors and other resistive, capacitive or inductive loads. Customers will benefit from this integrated protected low side drivers and the low pin count control interface which saves pins and isolation (...)
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| HTSSOP (PWP) | 16 | Ultra Librarian |
| SOT-23-THN (DYZ) | 16 | Ultra Librarian |
| SOIC (DW) | 20 | Ultra Librarian |
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