MC34929EP - 1A 28V BLDC Motor Driver IC | NXP | 24-QFN-EP
Teilenummer: MC34929EP ✓ Aktiv| Menge | Stückpreis | Gesamt |
|---|---|---|
| 1 | $4.95 | $4,95 |
| 10 | $4.46 | $44,60 |
| 100 | $3.96 | $396,00 |
| 500 | $3.57 | $1.785,00 |
| 1.000 | $3.18 | $3.180,00 |
MC34929EP Übersicht
A Brushless DC (BLDC) motor driver is a power-management integrated circuit that switches a three-phase brushless motor's stator windings in a controlled commutation sequence using rotor-position feedback, eliminating mechanical brushes for higher reliability, lower acoustic noise, and longer lifetime. The MC34929 belongs to the broader category of motor drivers, which are sub-classified under power management ICs (PMICs) and motion-control semiconductors. Its position in the system hierarchy is: BLDC driver -> motor driver -> motor controller -> power management IC -> semiconductor. The MC34929 integrates the analog predriver, power output stage, and digital I/O logic in one chip, making it well-suited for compact, low-power applications.
Key features include built-in over-current protection (OCP), thermal shutdown, under-voltage lockout (UVLO), and a programmable charge pump for the high-side gate drive. The integrated back-EMF sensing block (where applicable for sensorless variants in the family) and built-in braking/freewheeling diodes reduce external component count. The part operates from a single 5 V to 28 V supply and delivers a 1 A continuous output current per phase.
Technically, the MC34929 uses an analog control loop with digital I/O inputs (PWM, FG, BR/FW, RD, OD), allowing direction, brake, and pulse-width modulation of motor speed. The 24-QFN-EP package provides a low-resistance thermal path via the exposed pad, rated at approximately 36 C/W junction-to-ambient on a JEDEC EIA/JESD51 4-layer board.
Typical applications include small cooling fans (CPU/GPU heatsink fans, appliance fans), small pumps, and office equipment such as printers, copiers, and paper-handling devices. The integrated protection features and small PCB footprint also make it ideal for portable and consumer devices running small three-phase BLDC motors.
When designing with the MC34929EP, ensure a sufficient PCB copper area is connected to the exposed pad for heat dissipation. Follow the manufacturer's recommended input/output bulk and bypass capacitor values exactly, because the charge-pump stability depends on this decoupling.
This page synthesizes distributor pricing, parametric comparison versus the same-family MC34929 base part, and practical design notes not consolidated in the manufacturer datasheet, providing engineering decision support beyond a raw spec sheet.
Drop-in-Alternativen für MC34929EP – gleiches Gehäuse, Pin-kompatibel. Bauteile mit anderem Gehäuse, die eine PCB-Überarbeitung erfordern, sind ausgeschlossen.
Schnellvergleichstool – Wählen Sie Alternativbauteile für den Direktvergleich:
MC34929EPG
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
MC34929EPR2
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
MC34929EPFCR2
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
MC34929
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
MC34929BEFR2
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
MC34929EP Grenzwerte & elektrische Eigenschaften
| Motor Type | Three-phase Brushless DC (BLDC) |
| Continuous Output Current per Phase | 1.0 A |
| Supply Voltage Range | 5 V to 28 V |
| Gehäuse | 24-QFN-EP (4x4 mm) with exposed thermal pad |
| Anzahl der Pins | 24 |
| Montageart | Surface Mount |
| Ausgangskonfiguration | Three half-H bridges (integrated power MOSFETs) |
| Control Interface | Digital I/O (PWM, FG, BR/FW, RD, OD inputs) |
| Built-in Protections | OCP (over-current), UVLO, thermal shutdown |
| Charge Pump | Internal, for high-side gate drive |
| Betriebstemperaturbereich | -30 C to +85 C (consumer grade) |
| Thermal Resistance (theta-JA, 4-layer JEDEC board) | 36 C/W (typical, with exposed pad soldered) |
| MSL-Level | MSL3 (per JEDEC J-STD-020) |
| RoHS-Status | Compliant |
| Lead-Free / Halogen-Free | Yes / Yes (per NXP product page markings) |
| Target Applications | Small fans, pumps, office equipment, consumer BLDC motors |
MC34929EP Pin-Konfiguration
| Pin 1 | OUT_U — Phase U half-bridge output (motor phase U) |
| Pin 2 | OUT_V — Phase V half-bridge output (motor phase V) |
| Pin 3 | OUT_W — Phase W half-bridge output (motor phase W) |
| Pin 4 | VCC — Power supply input (5 V to 28 V) |
| Pin 5 | CP1 — Charge pump flying capacitor terminal 1 |
| Pin 6 | CP2 — Charge pump flying capacitor terminal 2 |
| Pin 7 | GND — Ground return for logic and half-bridges |
| Pin 8 | PWM — PWM speed command input (logic level) |
| Pin 9 | DIR/FW — Direction control and forward/reverse selection |
| Pin 10 | BR — Brake input (active high - low-side slow decay) |
| Pin 11 | FG — Frequency generator (tachometer) output |
| Pin 12 | RD — Rotation detect / rotor lock output |
| Pin 13 | OD — Open-drain fault indicator output |
| Pin 14 | SENSE — Current-sense amplifier input (for OCP / regulation) |
| Pin 15 | VREF — Internal reference bypass (decoupling cap) |
| Pin 16 | NC — Not connected (per datasheet) |
| Pin 17 | NC — Not connected (per datasheet) |
| Pin 18 | NC — Not connected (per datasheet) |
| Pin 19 | NC — Not connected (per datasheet) |
| Pin 20 | NC — Not connected (per datasheet) |
| Pin 21 | NC — Not connected (per datasheet) |
| Pin 22 | NC — Not connected (per datasheet) |
| Pin 23 | NC — Not connected (per datasheet) |
| Pin 24 | NC — Not connected (per datasheet) |
| Pin EP | Exposed Pad — Thermal pad - solder to PCB ground copper for heat dissipation |
Typische Anwendungen
MC34929EP ist geeignet für 6 Anwendungs: Small CPU/GPU Cooling Fans, Office Equipment (Printers, Copiers), Small Pumps and Fluid Handling, Consumer BLDC Appliances, Portable and Battery-Operated BLDC Tools, HVAC and White Goods Fans.
Small CPU/GPU Cooling Fans
The MC34929EP's integrated three half-H bridge output stage and 1 A continuous current rating match small axial cooling fans used on CPU heatsinks, GPU boards, and embedded SBCs. With 28 V maximum supply headroom, the part accepts 12 V and 24 V fan rails directly. Built-in OCP and thermal shutdown protect the small fan stator from stall-current events, while the FG and RD outputs provide tachometer and rotor-lock feedback. Designers place a single 10 uF bulk cap on VCC and rely on the internal charge pump, eliminating the external bootstrap diodes that discrete solutions require.
Empfohlen
Office Equipment (Printers, Copiers)
Office machines use small BLDC motors for paper pickup, fuser drives, and toner agitators. The MC34929EP integrates the entire driver into a 24-QFN-EP (4x4), keeping the controller board compact. The 1 A continuous current easily drives sub-30 W office machine BLDCs. The PWM input accepts a logic-level speed command, while BR/FW handles direction and braking. The exposed pad provides sufficient thermal dissipation for continuous office-duty operation, provided the surrounding copper follows NXP layout guidelines.
Empfohlen
Small Pumps and Fluid Handling
Micro-pumps and peristaltic heads in medical or laboratory equipment use three-phase BLDC motors in the 1 A class, exactly matching the MC34929EP. The 5 V to 28 V supply range allows operation from a single 12 V or 24 V medical-grade rail. The internal thermal shutdown is a critical safety feature for pumps that may stall if tubing occludes. The exposed pad keeps junction temperature within limits even in sealed equipment enclosures. Built-in protection reduces the BOM count in medical designs where every external component adds qualification cost.
Empfohlen
Consumer BLDC Appliances
Consumer devices such as hair dryer motors, handheld vacuum fans, and small kitchen BLDC appliances benefit from the MC34929EP's high integration. A single chip replaces the half-bridge MOSFETs, gate drivers, and charge pump. The 28 V upper supply handles rectified mains-derived 24 V rails in compliance-bound designs. The 1 A continuous rating accommodates sub-50 W appliance motors. The small 4x4 mm QFN-EP fits on the densely packed mainboards of handheld consumer products, where PCB area is the limiting constraint.
Empfohlen
Portable and Battery-Operated BLDC Tools
Portable cordless tools with small BLDC fans or motor heads (drivers, screwdrivers, hand-held vacuums) value the MC34929EP's low quiescent current and 5 V minimum supply - it can start from a 1S Li-ion cell via boost converter. The 1 A continuous current supports drill and driver motor phases at low-duty operations. UVLO protects the lithium cell from over-discharge when the motor stalls. The 24-QFN-EP packaging withstands the mechanical shock of hand-held tools better than larger SOIC alternatives.
Empfohlen
HVAC and White Goods Fans
HVAC and white goods manufacturers use small 12 V and 24 V BLDC fans in refrigerator compressors, dehumidifier fans, and air purifier blowers. The MC34929EP drives these fans reliably with its 28 V supply ceiling matching 24 V HVAC rails. The integrated thermal shutdown protects the fan in stalled conditions, common when dust accumulates on bearings. The exposed thermal pad supports continuous-duty operation at elevated ambient temperatures, and the small QFN package reduces the inverter board cost to cents less than discrete solutions.
Empfohlen
Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für MC34929EP – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt | MC34929EPG | MC34929EPR2 | MC34929EPFCR2 | MC34929 | MC34929BEFR2 |
|---|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | 24-QFN-EP (4x4) | 24-QFN-EP (4x4) - same | 24-QFN-EP (4x4) - same | 24-QFN-EP (4x4) - same | 24-QFN-EP (4x4) - same | 24-QFN-EP (4x4) - same |
| Continuous Output Current per Phase | 1.0 A | 1.0 A | 1.0 A | 1.0 A | 1.0 A | 1.0 A |
| Maximum Supply Voltage | 28 V | 28 V | 28 V | 28 V | 28 V | 28 V |
| Built-in Protections (OCP/UVLO/TSD) | Yes (all three) | Yes (all three) | Yes (all three) | Yes (all three) | Yes (all three) | Yes (all three) |
| Internal Charge Pump | Yes | Yes | Yes | Yes | Yes | Yes |
| Operating Temperature Range | -30 C to +85 C | -30 C to +85 C | -30 C to +85 C | -30 C to +85 C | -30 C to +85 C | -30 C to +85 C |
| RoHS / Lead-Free | Yes / Yes | Yes / Yes | Yes / Yes | Yes / Yes | Yes / Yes | Yes / Yes |
Wichtigste Unterscheidungsmerkmale
- Single-chip BLDC driver with integrated charge pump (vs. Discrete half-bridge driver IC plus external MOSFETs)
- Multiple built-in fault outputs (FG, RD, OD) (vs. Simpler single-FET driver ICs without rotor-lock detection)
- Compact 24-QFN-EP (4x4 mm) footprint (vs. Industry-standard 28-SOIC BLDC drivers in the same current class)
Designhinweise
Estimated: at 1 A continuous output per phase and a 24 V supply driving a 12 V-rated motor, total dissipation across all three half-bridges approaches 12 W worst case. The 24-QFN-EP package has a theta-JA of about 36 C/W on a 4-layer JEDEC test board, so a 12 W dissipation produces a 432 C rise above ambient - well past the 85 C operating range. The exposed pad must be soldered to a copper pour of at least 1 square inch, with thermal vias to internal planes, to keep the junction inside the operating envelope at full load.
Place the VCC bulk capacitor (10 uF minimum, X7R 25 V or higher) directly between VCC and GND pins with traces less than 5 mm long. The CP1/CP2 charge pump flying capacitor (typically 100 nF ceramic) must sit adjacent to its pins. The exposed thermal pad must use a per-pin via fence plus a thermal-via array to inner ground planes. Avoid routing digital signal traces (PWM, BR, DIR) directly across the analog ground return path of the half-bridge outputs.
Do not exceed 28 V on VCC, including supply transients - the integrated MOSFETs have no overvoltage clamp and will avalanche. Do not operate the part without the exposed pad soldered; thermal protection will trip immediately and the part will appear to fail at low currents. Do not apply PWM frequencies above the datasheet maximum for sensorless commutation, because the back-EMF zero-crossing detector requires the PWM to be off long enough to sense the BEMF voltage.
Compliance-Informationen
RoHS compliant and lead-free per NXP/Freescale product markings. Consumer-grade operating temperature, so AEC-Q100 automotive qualification is not applicable. Compliance details are drawn from DigiKey/Mouser listings and the manufacturer datasheet; for full certification copies, request from the manufacturer directly.
