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A4915METTR-T

Public Made by Adom

by adom

Allegro MicroSystems LLC Brushless DC (BLDC) Motor Driver, QFN-28-EP(5x5). Datasheet-verified pinout, KiCad symbol/footprint/3D.

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Contents

README

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A4915METTR-T

Allegro MicroSystems LLC · Brushless DC (BLDC) Motor Driver · QFN-28-EP(5x5)

A4915METTR-T from Allegro MicroSystems LLC, in a QFN-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 VBB power_in Power supply input, 5 V to 50 V operating range
2 SPEED input PWM duty cycle analog input, 0 V to VDD; output enabled above 79% VDD, disabled below 20% VDD
3 TDEAD input Dead time setting terminal with external resistor 12 kΩ to 220 kΩ connected to ground
4 VDD power_in Logic supply voltage input, 3 V to 5.5 V operating range
5 FAULT output Open-drain active-high fault output for thermal shutdown and protection events
6 ENABLE input PWM enable logic input; high enables phase drivers, low enters sleep mode after 1-3 ms
7 DIR input Motor direction control logic input for commutation direction selection
8 BRAKEn input Active-low brake logic input that shorts all low-side drivers to LSS, overriding ENABLE and SPEED
9 HA input Hall sensor input phase A with internal 100 kΩ pull-up to VDD
10 HB input Hall sensor input phase B with internal 100 kΩ pull-up to VDD
11 HC input Hall sensor input phase C with internal 100 kΩ pull-up to VDD
12 LSS input Low-side current sense terminal for external resistor (200-500 mV drop) or ground connection
13 GLC output Low-side gate driver output phase C, minimum voltage VREG - 0.2 V at 10 µA load
14 GHC output High-side gate driver output phase C, minimum voltage Cx - 0.2 V with charged bootstrap capacitor
15 SC power_in Phase C high-side source connection providing negative supply for high-side gate driver
16 CC power_out Phase C bootstrap supply node for capacitor and high-side gate driver
17 GLB output Low-side gate driver output phase B, minimum voltage VREG - 0.2 V at 10 µA load
18 GHB output High-side gate driver output phase B, minimum voltage Cx - 0.2 V with charged bootstrap capacitor
19 SB power_in Phase B high-side source connection providing negative supply for high-side gate driver
20 CB power_out Phase B bootstrap supply node for capacitor and high-side gate driver
21 GLA output Low-side gate driver output phase A, minimum voltage VREG - 0.2 V at 10 µA load
22 GHA output High-side gate driver output phase A, minimum voltage Cx - 0.2 V with charged bootstrap capacitor
23 SA power_in Phase A high-side source connection providing negative supply for high-side gate driver
24 CA power_out Phase A bootstrap supply node for capacitor and high-side gate driver
25 VREG power_out Regulated gate drive supply output, 7.0 V to 13.75 V depending on VBB input voltage
26 CP2 passive Charge pump capacitor terminal; connect 0.47 µF ceramic capacitor between CP1 and CP2
27 CP1 passive Charge pump capacitor terminal; connect 0.47 µF ceramic capacitor between CP1 and CP2
28 GND power_in Ground connection for logic and power return
29 EP passive Exposed pad (from the footprint; not named in the datasheet pin table).

Key specifications

Parameter Value
Manufacturer Allegro MicroSystems LLC
Package QFN-28-EP(5x5)
Category Motor Driver ICs
Pins 29

CAD (KiCad official)

  • Symbol: A4915METTR-T
  • Footprint: Package_DFN_QFN:QFN-28-1EP_5x5mm_P0.5mm_EP3.35x3.35mm
  • 3D model: QFN-28-EP(5x5) (KiCad packages3D, STEP)
  • 3D model files: a4915mettr-t-etched.step / a4915mettr-t-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); a4915mettr-t.step / a4915mettr-t.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: Allegro MicroSystems LLC datasheet (17 pp, sha256 e79f8d6c07a605a0, retrieved 2026-09-22, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.2, primary claude-haiku-4-5-20251001 (text), consensus claude-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).

Datasheet PDF