component
MS4931
Public Made by Adomby adom
Hangzhou Ruimeng Tech Brushless DC (BLDC) Motor Driver, VQFN-28-EP(5x5). Datasheet-verified pinout, KiCad symbol/footprint/3D.
3D Model
Open in new tab ↗
Loads on click. Unloads only if this page sits in the background.
Symbol & Footprint
Schematic Symbol
Open full view ↗Loads on click. Unloads only if this page sits in the background.
PCB Footprint
Open full view ↗Loads on click. Unloads only if this page sits in the background.
Datasheet
Open in new tab ↗Loads on click. Unloads only if this page sits in the background.
README
markdownMS4931
Hangzhou Ruimeng Tech · Brushless DC (BLDC) Motor Driver · VQFN-28-EP(5x5)
MS4931 from Hangzhou Ruimeng Tech, in a VQFN-28-EP(5x5). Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | HA+ | input | HALL signal positive input for phase A (logic high when IN+ exceeds IN-, logic low when IN- exceeds IN+) |
| 2 | HA- | input | HALL signal negative input for phase A (logic inverse of HA+ differential pair) |
| 3 | HB+ | input | HALL signal positive input for phase B (logic high when IN+ exceeds IN-, logic low when IN- exceeds IN+) |
| 4 | HB- | input | HALL signal negative input for phase B (logic inverse of HB+ differential pair) |
| 5 | HC+ | input | HALL signal positive input for phase C (logic high when IN+ exceeds IN-, logic low when IN- exceeds IN+) |
| 6 | HC- | input | HALL signal negative input for phase C (logic inverse of HC+ differential pair) |
| 7 | GND | power_in | Logical ground reference for gate drive and control circuits |
| 8 | HBIAS | power_out | 5V regulated output for logic power supply with output voltage 5.58-5.66V at −5mA load and 7mV line regulation from 8-35V |
| 9 | CP1 | bidirectional | Charge pump capacitor connection pad, 1µF external capacitor typically connected between CP1 and CP2 with 50kHz charge pump frequency |
| 10 | CP2 | bidirectional | Charge pump capacitor connection pad, 1µF external capacitor typically connected between CP1 and CP2 with 50kHz charge pump frequency |
| 11 | VBB | power_in | Power supply input for gate drive circuits with operating range 8V to 35V and absolute maximum rating of 36V |
| 12 | VCP | power_out | Charge pump output voltage approximately VBB+5.2V for high-side gate driver floating supply with external capacitor to VBB typically 1-10µF |
| 13 | SENSE | output | Output current sensing signal proportional to gate drive current with reference voltage 500mV at 1A current |
| 14 | GLC | output | Low-side gate driver output for phase C with gate output voltage 5.6V and gate drive current ±20-30mA |
| 15 | GLB | output | Low-side gate driver output for phase B with gate output voltage 5.6V and gate drive current ±20-30mA |
| 16 | GLA | output | Low-side gate driver output for phase A with gate output voltage 5.6V and gate drive current ±20-30mA |
| 17 | GHC | output | High-side gate driver output for phase C with gate voltage VBB+5.2V and gate drive current ±20-30mA referenced to SC |
| 18 | SC | output | High-side MOSFET source connection for phase C, must connect directly to the source of the upper power FET for gate drive reference |
| 19 | GHB | output | High-side gate driver output for phase B with gate voltage VBB+5.2V and gate drive current ±20-30mA referenced to SB |
| 20 | SB | output | High-side MOSFET source connection for phase B, must connect directly to the source of the upper power FET for gate drive reference |
| 21 | GHA | output | High-side gate driver output for phase A with gate voltage VBB+5.2V and gate drive current ±20-30mA referenced to SA |
| 22 | SA | output | High-side MOSFET source connection for phase A, must connect directly to the source of the upper power FET for gate drive reference |
| 23 | FG1 | output | FG1 speed feedback output for three-phase motor speed control with open-drain configuration |
| 24 | FG2 | output | FG2 speed feedback output for single-phase motor speed control with open-drain configuration |
| 25 | CLD | bidirectional | Stall protection capacitor connection pad where protection time delay equals 90×C(µF) seconds with typical 0.022µF providing approximately 2 seconds |
| 26 | DIR | input | Motor rotation direction control input with logic high (≥1.75V) for forward rotation and logic low (≤1.65V) for reverse rotation |
| 27 | ENABLE | input | External PWM speed control input accepting pulse trains at 0.5-60kHz frequency for variable speed control |
| 28 | BREAKZ | input | Motor brake control input (active low), logic low (≤1.65V) grounds all output MOSFETs for braking, high/open-circuit (≥1.75V) enables normal operation |
| 29 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Hangzhou Ruimeng Tech |
| Package | VQFN-28-EP(5x5) |
| Category | Motor Driver ICs |
| Pins | 29 |
CAD (KiCad official)
- Symbol:
MS4931 - Footprint:
Package_DFN_QFN:QFN-28-1EP_5x5mm_P0.5mm_EP3.35x3.35mm - 3D model: VQFN-28-EP(5x5) (KiCad packages3D, STEP)
- 3D model files:
ms4931-etched.step/ms4931-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);ms4931.step/ms4931.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Hangzhou Ruimeng Tech datasheet (14 pp, sha256
becf7ad012f9d840, retrieved 2026-09-22, tier: lcsc) - Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- Extractor: parts-factory
2.0.0/extract_pins 0.2, primaryclaude-haiku-4-5-20251001(text), consensusclaude-sonnet-4-6(agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish. - CAD: KiCad official libraries (CC-BY-SA 4.0).