DRV8231

@@ -0,0 +1,51 @@+# DRV8231++**Texas Instruments** · Brushed DC motor driver · WSON-8++Single H-bridge driver for one brushed DC motor from a 4.5 to 33 V supply, delivering up to 3.7 A peak. Two logic inputs set forward, reverse, brake, and coast, and an integrated current-sense output (IPROPI) mirrors the motor current as a small analog signal a host can read without a shunt in the motor path. An adjustable current-limit trip and built-in undervoltage, overcurrent, and overtemperature protection round it out. The tiny WSON suits compact motor and actuator drives.++## Pinout++| Pin | Name | Type | Function |+|---|---|---|---|+| 1 | IPROPI | output | Analog current output proportional to load current (current mirror, 1500 µA/A scaling factor). Connect an external resistor (RIPROPI) to GND to convert to a voltage for sensing/regulation with VREF. Max 3 mA, max voltage 5.75 V. |+| 2 | IN2 | input | Logic input controlling H-bridge output OUT2. Has internal pulldown (100 kΩ to GND). Compatible with 1.8-V/3.3-V/5-V logic; VIH ≥ 1.5 V, VIL ≤ 0.5 V. Supports PWM up to 200 kHz. |+| 3 | IN1 | input | Logic input controlling H-bridge output OUT1. Has internal pulldown (100 kΩ to GND). Compatible with 1.8-V/3.3-V/5-V logic; VIH ≥ 1.5 V, VIL ≤ 0.5 V. Supports PWM up to 200 kHz. |+| 4 | VREF | input | Analog reference voltage input (0 to 5 V, max 6 V) setting the current-regulation trip threshold together with RIPROPI. Absorbs the need for MCU intervention during start-up/stall. |+| 5 | VM | power_in | Motor power supply, 4.5 V to 33 V (abs max 35 V). Bypass with a 0.1-µF ceramic to GND plus sufficient bulk capacitance rated for VM. |+| 6 | OUT1 | output | H-bridge output 1. Connect directly to one motor terminal or other inductive load. Peak current 3.7 A; RDS(on) high-side + low-side ≈ 600 mΩ at 24 V. |+| 7 | GND | power_in | Device power ground. Connect to system ground plane; tie to thermal pad for good return and thermal dissipation. |+| 8 | OUT2 | output | H-bridge output 2. Connect directly to the other motor terminal or other inductive load. Peak current 3.7 A; body-diode forward voltage ≈ 0.8 V at 1 A. |+| 9 | PAD | passive | Exposed thermal pad. Connect to board ground and use large ground planes on multiple layers with multiple nearby vias for effective heat dissipation. |++## Key specifications++| Parameter | Value |+|---|---|+| Type | Brushed DC motor driver (single H-bridge) |+| Supply (VM) | 4.5-33 V |+| Peak current | 3.7 A |+| Current sense | Integrated (IPROPI output) |+| Control | PWM via IN1 / IN2 |+| Protection | UVLO, OCP, OTP |+| Package | WSON-8 (2x2 mm) |++## Ordering variants++- `DRV8231ADSGR (WSON-8, tape & reel)`++## CAD (KiCad official)++- Symbol: `Driver_Motor:DRV8231ADSG (KiCad official)`+- Footprint: `Package_SON:WSON-8-1EP_2x2mm_P0.5mm_EP0.9x1.6mm`+- 3D model: WSON-8 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/lit/ds/symlink/drv8231a.pdf) (44 pp, sha256 `96545c004b2fa920`, retrieved 2026-08-17, tier: manufacturer)+- **Extractor:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.+- **CAD:** KiCad official libraries (CC-BY-SA 4.0).++[Datasheet PDF](docs/drv8231-datasheet.pdf)

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