MC34929EP - 1A 28V BLDC Motor Driver IC | NXP | 24-QFN-EP
Артикул: MC34929EP ✓ Активен| Кол-во | Цена за ед. | Итого |
|---|---|---|
| 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 Обзор
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.
Аналоги без доработки для MC34929EP — тот же корпус, pin-to-pin совместимость. Компоненты в других корпусах, требующие переработки PCB, исключены.
Инструмент быстрого сравнения — выберите альтернативные компоненты для сравнения бок о бок:
MC34929EPG
✅ Прямая замена📋 Справочный аналог (нет в каталоге)
MC34929EPR2
✅ Прямая замена📋 Справочный аналог (нет в каталоге)
MC34929EPFCR2
✅ Прямая замена📋 Справочный аналог (нет в каталоге)
MC34929
✅ Прямая замена📋 Справочный аналог (нет в каталоге)
MC34929BEFR2
✅ Прямая замена📋 Справочный аналог (нет в каталоге)
MC34929EP Максимальные параметры и электрические характеристики
| Motor Type | Three-phase Brushless DC (BLDC) |
| Continuous Output Current per Phase | 1.0 A |
| Supply Voltage Range | 5 V to 28 V |
| Корпус | 24-QFN-EP (4x4 mm) with exposed thermal pad |
| Количество выводов | 24 |
| Тип монтажа | Surface Mount |
| Выходная конфигурация | 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 |
| Диапазон рабочих температур | -30 C to +85 C (consumer grade) |
| Thermal Resistance (theta-JA, 4-layer JEDEC board) | 36 C/W (typical, with exposed pad soldered) |
| Уровень MSL | MSL3 (per JEDEC J-STD-020) |
| Статус RoHS | Compliant |
| Lead-Free / Halogen-Free | Yes / Yes (per NXP product page markings) |
| Target Applications | Small fans, pumps, office equipment, consumer BLDC motors |
Конфигурация выводов MC34929EP
| Контакт 1 | OUT_U — Phase U half-bridge output (motor phase U) |
| Контакт 2 | OUT_V — Phase V half-bridge output (motor phase V) |
| Контакт 3 | OUT_W — Phase W half-bridge output (motor phase W) |
| Контакт 4 | VCC — Power supply input (5 V to 28 V) |
| Контакт 5 | CP1 — Charge pump flying capacitor terminal 1 |
| Контакт 6 | CP2 — Charge pump flying capacitor terminal 2 |
| Контакт 7 | GND — Ground return for logic and half-bridges |
| Контакт 8 | PWM — PWM speed command input (logic level) |
| Контакт 9 | DIR/FW — Direction control and forward/reverse selection |
| Контакт 10 | BR — Brake input (active high - low-side slow decay) |
| Контакт 11 | FG — Frequency generator (tachometer) output |
| Контакт 12 | RD — Rotation detect / rotor lock output |
| Контакт 13 | OD — Open-drain fault indicator output |
| Контакт 14 | SENSE — Current-sense amplifier input (for OCP / regulation) |
| Контакт 15 | VREF — Internal reference bypass (decoupling cap) |
| Контакт 16 | NC — Not connected (per datasheet) |
| Контакт 17 | NC — Not connected (per datasheet) |
| Контакт 18 | NC — Not connected (per datasheet) |
| Контакт 19 | NC — Not connected (per datasheet) |
| Контакт 20 | NC — Not connected (per datasheet) |
| Контакт 21 | NC — Not connected (per datasheet) |
| Контакт 22 | NC — Not connected (per datasheet) |
| Контакт 23 | NC — Not connected (per datasheet) |
| Контакт 24 | NC — Not connected (per datasheet) |
| Контакт EP | Exposed Pad — Thermal pad - solder to PCB ground copper for heat dissipation |
Типичное применение
MC34929EP подходит для 6 применениеs: 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.
Рекомендуется
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.
Рекомендуется
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.
Рекомендуется
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.
Рекомендуется
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.
Рекомендуется
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.
Рекомендуется
Сводка рекомендуемых товаров
Справочные инженерные данные для MC34929EP — сравнение, рекомендации по проектированию и информация о соответствии.
Руководство по выбору
Сравнение с аналогами
| Параметр | Этот товар | 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 |
Ключевые отличия
- Single-chip BLDC driver with integrated charge pump (против Discrete half-bridge driver IC plus external MOSFETs)
- Multiple built-in fault outputs (FG, RD, OD) (против Simpler single-FET driver ICs without rotor-lock detection)
- Compact 24-QFN-EP (4x4 mm) footprint (против Industry-standard 28-SOIC BLDC drivers in the same current class)
Заметки по проектированию
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.
Информация о соответствии
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.
