The DRV8711DCPR is a stepper motor external MOSFET gate driver from Texas Instruments, operating from 8V to 52V, supporting up to 1\/256 microstepping via SPI interface, with built-in overcurrent and thermal shutdown protection, in an HTSSOP-28 package.<\/p>\n
DRV8711DCPR Overview The DRV8711DCPR is a stepper motor external MOSFET gate driver from Texas Instruments, operating from 8V to 52V, supporting up to 1\/256 microstepping via SPI interface, with built-in overcurrent and thermal shutdown protection, in an HTSSOP-28 package. Key Features Supply voltage: 8V-52V Gate drive current: 100mA source\/200mA sink SPI control interface Microstep resolution: […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[36,13],"tags":[],"chip_brand":[138],"class_list":["post-8027","post","type-post","status-publish","format-standard","hentry","category-gate-driver-ics","category-integrated-circuits-ics","chip_brand-ti"],"acf":{"brief_explanation":"Stepper motor gate driver, SPI, 5-60V, HTSSOP-28","date_code":"","package_case":"HTSSOP-28 (9.70 x 4.40 x 1.20 mm, w\/ EP)","in_stock":14089,"datasheet":"https:\/\/www.ti.com\/lit\/ds\/symlink\/drv8711.pdf","price":"$4.20 @ 1ku","product_introduction":"The DRV8711DCPR is a stepper motor gate driver from Texas Instruments in a 38-pin HTSSOP (9.7 x 4.4 mm) package, designed to drive external N-channel MOSFET H-bridges for high-current bipolar stepper motor applications. It supports motor supply voltages from 8 V to 52 V with up to 1\/256 microstepping via an integrated indexer and 8-bit DAC per winding. The device features SPI control for all parameters, automatic mixed decay mode (smart tune), adjustable gate drive current (5-80 mA), stall detection via back-EMF, and extensive diagnostics including over-current, under-voltage, over-temperature, and open-load detection. A 5 V \/ 10 mA regulator output powers external logic.","working_principle":"The DRV8711DCPR generates the gate drive signals for four external half-bridge N-channel MOSFET pairs (two per motor winding) to form two complete H-bridges. The internal step indexer divides each full step into up to 256 microsteps, generating sinusoidal current references for the A and B windings with a 90-degree phase offset. The current through each winding is sensed via an external sense resistor and compared with the DAC-generated reference by an internal PWM chopper controller. When the sensed current exceeds the reference, the chopper enters the decay phase. The smart tune decay mode automatically selects the optimal fast-to-slow decay ratio based on the operating point, eliminating the need for manual decay tuning across speed and load conditions. The SPI interface provides full register-level control over microstep resolution, current setpoint, gate drive strength, blanking time, and decay parameters. The stall detection algorithm monitors the back-EMF of the motor to detect a stalled rotor without external sensors. Gate drive current is programmable from 5 mA to 80 mA per output, optimizing switching speed versus EMI for different MOSFET selections. Internal protection circuits include over-current protection (OCP), over-temperature shutdown (OTS), and under-voltage lockout (UVLO).","pin_description":"
| Pin<\/th> | Name<\/th> | Description<\/th><\/tr> | ||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1<\/td> | nSLEEP<\/td> | Sleep mode input; active low, pull high for normal operation<\/td><\/tr> | ||||||||||||||||||||||||||||||||||||
| 2<\/td> | STEP<\/td> | Step input; rising edge advances one microstep<\/td><\/tr> | ||||||||||||||||||||||||||||||||||||
| 3<\/td> | DIR<\/td> | Direction input; sets rotation direction<\/td><\/tr> | ||||||||||||||||||||||||||||||||||||
| 4<\/td> | SDI<\/td> | SPI data input; serial data from MCU<\/td><\/tr> | ||||||||||||||||||||||||||||||||||||
| 5<\/td> | SDO<\/td> | SPI data output; serial data to MCU<\/td><\/tr> | ||||||||||||||||||||||||||||||||||||
| 6<\/td> | SCLK<\/td> | SPI clock input<\/td><\/tr> | ||||||||||||||||||||||||||||||||||||
| 7<\/td> | nCS<\/td> | SPI chip select; active low<\/td><\/tr> | ||||||||||||||||||||||||||||||||||||
| 8<\/td> | nFAULT<\/td> | Fault output; active low, open-drain fault indicator<\/td><\/tr> | ||||||||||||||||||||||||||||||||||||
| 9<\/td> | AVDD<\/td> | Analog reference supply (3.3 V); decouple with 0.1 uF<\/td><\/tr> | ||||||||||||||||||||||||||||||||||||
| 10<\/td> | DVDD<\/td> | Digital logic supply (3.3 V); decouple with 0.1 uF<\/td><\/tr> | ||||||||||||||||||||||||||||||||||||
| 11,16<\/td> | AGND<\/td> | Analog ground<\/td><\/tr> | ||||||||||||||||||||||||||||||||||||
| 12<\/td> | VREF<\/td> | External current reference input; overrides internal DAC if used<\/td><\/tr> | ||||||||||||||||||||||||||||||||||||
| 13<\/td> | ISENSE1<\/td> | Current sense input winding A; connect to sense resistor<\/td><\/tr> | ||||||||||||||||||||||||||||||||||||
| 14<\/td> | ISENSE2<\/td> | Current sense input winding B; connect to sense resistor<\/td><\/tr> | ||||||||||||||||||||||||||||||||||||
| 15<\/td> | VM<\/td> | Motor supply voltage (8 V to 52 V)<\/td><\/tr> | ||||||||||||||||||||||||||||||||||||
| 17-20<\/td> | AH1,AL1,AH2,AL2<\/td> | Gate drive outputs H-bridge A; high-side and low-side<\/td><\/tr> | ||||||||||||||||||||||||||||||||||||
| 21-24<\/td> | ASH1,ASL1,ASH2,ASL2<\/td> | Source sense connections H-bridge A<\/td><\/tr> | ||||||||||||||||||||||||||||||||||||
| 25-28<\/td> | BH1,BL1,BH2,BL2<\/td> | Gate drive outputs H-bridge B<\/td><\/tr> | ||||||||||||||||||||||||||||||||||||
| 29-32<\/td> | BSH1,BSL1,BSH2,BSL2<\/td> | Source sense connections H-bridge B<\/td><\/tr><\/table>","application_scenarios":"
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