MC34920EI - Quad H-Bridge Motor Driver, 1.5A, 44-PLCC | NXP
料号： MC34920EI ✗ 停产| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $14.5 | $14.50 |
| 10 | $13.05 | $130.50 |
| 100 | $11.6 | $1,160.00 |
| 500 | $10.44 | $5,220.00 |
| 1,000 | $9.28 | $9,280.00 |
MC34920EI 概述
A motor driver is an integrated circuit that converts logic-level control signals from a microcontroller into the high-current drive waveforms required by brushed DC motors, bipolar stepper motors, solenoids, and similar inductive actuators. The MC34920 belongs to the motor driver / motor controller family, which itself sits within the broader power management IC hierarchy. By integrating four full bridges on one die, the MC34920 reduces board area and BOM count in multi-axis motion designs, while the on-chip switching regulators simplify the local power tree by supplying downstream logic and analog blocks.
Key features include a serial (SPI-compatible) command interface for direction, enable, and fault reporting, built-in shoot-through protection with adaptive dead-time, overcurrent and thermal shutdown, and a 21 V to 42 V motor supply range that is compatible with 24 V industrial and automotive battery buses. The bipolar drive topology supports both forward and reverse torque without external H-bridge discretes.
Typical applications include dual-axis stepper indexers, brushed DC servo drives, solenoid/valve actuators in industrial automation, and small-format printers and POS mechanisms. The combination of quad bridges and integrated DC/DC regulators makes the part attractive where space and component count dominate the design trade-off.
When designing with this device, place the bulk motor supply capacitors within 10 mm of the VBAT pins and use a 4-layer PCB with a solid ground pour under the exposed paddle to keep junction temperature below 150 C at 1.5 A per bridge. The PLCC-44 footprint requires a socket or hand-soldered reflow profile tuned to JEDEC J-STD-020 moisture sensitivity level handling.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, giving engineers a single source for sourcing, substitution, and layout guidance.
直接替换替代料： MC34920EI ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
快速对比工具——选择替代料号进行并排对比：
MC34920EI
✅ 直接替换✓ 有现货
$9.28 / 个
查看数据手册 →MC34920EIR2
✅ 直接替换📋 参考替代料（不在目录中）
MC34920CFN
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
MPC17520DC
✅ 直接替换📋 参考替代料（不在目录中）
MC34920EI 最大额定值与电气特性
| 功能 | Quad H-Bridge Motor Driver |
| Motor Type | Bipolar DC, Stepper, Solenoid |
| 输出数量 | 2 (quad H-bridge) |
| 拓扑 | H-Bridge (4 full bridges) |
| 输出配置 | Half-Bridge / Full-Bridge |
| 电源电压 | 21 V to 42 V |
| Continuous Output Current | 1.5 A per channel |
| On-Resistance (Typ) | 2.8 ohm per FET |
| 接口 | Serial (SPI-compatible) |
| Integrated DC/DC Regulators | Yes (2 switching regulators on-chip) |
| Integrated Reset Circuit | Yes |
| Integrated Sense Circuit | Yes (2) |
| 封装 | 44-PLCC (16.59 x 16.59 mm) |
| 安装类型 | Surface Mount |
| Operating Temperature Grade | Commercial |
MC34920EI 引脚配置
| 引脚 1 | OUT1A — H-bridge 1 output A |
| 引脚 2 | OUT1B — H-bridge 1 output B |
| 引脚 3 | VS1 — Bridge 1 motor supply |
| 引脚 4 | GND — Ground |
| 引脚 5 | OUT2A — H-bridge 2 output A |
| 引脚 6 | OUT2B — H-bridge 2 output B |
| 引脚 7 | VS2 — Bridge 2 motor supply |
| 引脚 8 | GND — Ground |
| 引脚 9 | OUT3A — H-bridge 3 output A |
| 引脚 10 | OUT3B — H-bridge 3 output B |
| 引脚 11 | VS3 — Bridge 3 motor supply |
| 引脚 12 | GND — Ground |
| 引脚 13 | OUT4A — H-bridge 4 output A |
| 引脚 14 | OUT4B — H-bridge 4 output B |
| 引脚 15 | VS4 — Bridge 4 motor supply |
| 引脚 16 | GND — Ground |
| 引脚 17 | VS — Logic supply |
| 引脚 18 | VDD — Regulated logic supply output |
| 引脚 19 | GND — Ground |
| 引脚 20 | SENSE1 — Current sense input 1 |
| 引脚 21 | SENSE2 — Current sense input 2 |
| 引脚 22 | RESET — Reset output to host MCU |
| 引脚 23 | MOSI — SPI data input |
| 引脚 24 | MISO — SPI data output |
| 引脚 25 | SCLK — SPI clock |
| 引脚 26 | CS — SPI chip select |
| 引脚 27 | FAULT — Fault output (open drain) |
| 引脚 28 | EN1 — Bridge 1 enable |
| 引脚 29 | EN2 — Bridge 2 enable |
| 引脚 30 | EN3 — Bridge 3 enable |
| 引脚 31 | EN4 — Bridge 4 enable |
| 引脚 32 | DIR1 — Bridge 1 direction control |
| 引脚 33 | DIR2 — Bridge 2 direction control |
| 引脚 34 | DIR3 — Bridge 3 direction control |
| 引脚 35 | DIR4 — Bridge 4 direction control |
| 引脚 36 | PWM1 — Bridge 1 PWM input |
| 引脚 37 | PWM2 — Bridge 2 PWM input |
| 引脚 38 | PWM3 — Bridge 3 PWM input |
| 引脚 39 | PWM4 — Bridge 4 PWM input |
| 引脚 40 | DCDCVIN — Switching regulator 1 input |
| 引脚 41 | DCDCVOUT1 — Switching regulator 1 output |
| 引脚 42 | DCDCVIN2 — Switching regulator 2 input |
| 引脚 43 | DCDCVOUT2 — Switching regulator 2 output |
| 引脚 44 | NC — Not connected (per datasheet) |
典型应用
MC34920EI 适用于 6 应用s: Bipolar Stepper Motor Indexer, Brushed DC Servo Drive, Solenoid and Valve Actuator Bank, POS Terminal and Receipt Printer Mechanism, Industrial 24 V Bus Stepper / DC Module, Robotics and Small Multi-Axis Actuator Board.
Bipolar Stepper Motor Indexer
The MC34920EI's four integrated H-bridges can be paired as two full-bridge channels to drive two bipolar stepper motors in full-step or half-step microstepping sequences. Each bridge delivers 1.5 A continuous, which is suitable for NEMA 17 and small NEMA 23 frame stepper indexers in CNC, 3D-printer, and pick-and-place applications. The on-chip sense circuits simplify current chopping and stall detection for closed-loop position control, while the SPI interface allows a single MCU to command all bridges with minimal GPIO.
推荐
Brushed DC Servo Drive
Each pair of H-bridges in the MC34920EI can drive a single brushed DC motor in forward/reverse/torque mode at 1.5 A continuous and up to 42 V. The bipolar topology provides four-quadrant operation (forward drive, reverse drive, forward regen, reverse regen) which is essential for closed-loop velocity and position servo loops. Adaptive dead-time and shoot-through protection allow the designer to use slow-rising PWM without external gate-driver delay matching.
推荐
Solenoid and Valve Actuator Bank
The MC34920EI can drive up to four inductive solenoid loads (relays, valves, latches) directly from the H-bridges at 1.5 A each, allowing on/off or push/pull actuation from a single IC. The integrated DC/DC regulators simplify the host supply by generating logic rails from the 24 V motor bus. Built-in flyback handling through the bridge legs reduces the need for external freewheeling diodes on each solenoid.
推荐
POS Terminal and Receipt Printer Mechanism
Receipt and label printers typically use a combination of one bipolar stepper motor (paper feed) and one or two solenoid actuators (cutter and head-lift), all of which fit within the four bridges of the MC34920EI. The 21 V to 42 V supply range aligns with the 24 V power rail commonly used in retail POS equipment, and the PLCC-44 package is straightforward to assemble on FR-4 printer mainboards. The integrated DC/DC regulators can power the printer logic block directly.
推荐
Industrial 24 V Bus Stepper / DC Module
In factory automation, 24 V PLC-style backplanes are a common supply bus. The MC34920EI's 21 V to 42 V input range allows direct connection to a regulated 24 V industrial bus without pre-regulation. Two-stepper or two-DC axes per IC, plus integrated switching regulators, allow compact multi-axis I/O modules that mount on DIN rails and talk to a host PLC over SPI. The PLCC-44 footprint is suitable for through-hole or socketed industrial modules.
推荐
Robotics and Small Multi-Axis Actuator Board
Small hobby and educational robotics platforms use a few small DC gear-motors and stepper motors in tight spaces. The MC34920EI's combination of four bridges and two DC/DC regulators on a single 16.59 mm x 16.59 mm PLCC package fits this use case where board area and BOM count matter. SPI host control reduces MCU pin count, leaving more GPIOs free for sensors and communication in robot arms, pan-tilt heads, and small mobile platforms.
推荐
推荐产品汇总
工程参考数据： MC34920EI ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | MC34920EIR2 | MC34920CFN | MPC17520DC |
|---|---|---|---|---|
| Package | 44-PLCC (16.59 x 16.59 mm) | 44-PLCC - same | 44-PLCC - same | 44-PLCC - same |
| Brand | NXP Semiconductors (Freescale) | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Number of H-Bridges | 4 full bridges | 4 full bridges | 4 full bridges | 2 full bridges |
| Output Current (per channel) | 1.5 A continuous | 1.5 A continuous | 1.5 A continuous | 1.0 A continuous |
| Supply Voltage | 21 V to 42 V | 21 V to 42 V | 21 V to 42 V | 2.0 V to 8.6 V (low-voltage predecessor) |
| Integrated DC/DC Regulators | 2 switching regulators | 2 switching regulators | 2 switching regulators | None |
| Interface | Serial (SPI-compatible) | Serial (SPI-compatible) | Serial (SPI-compatible) | Parallel |
| Lifecycle Status | NRND | NRND | NRND | NRND / EOL |
关键差异点
- Quad H-bridge integration plus dual on-chip switching regulators （对比 MPC17520DC)
- High motor supply voltage range （对比 MPC17520DC)
- SPI serial control interface （对比 MPC17520DC)
设计说明
At 1.5 A per bridge at 42 V motor supply, worst-case on-state power per bridge is approximately I^2 x R = (1.5 A)^2 x (2.8 ohm x 2 FETs in path) = 12.6 W per bridge. Across four bridges simultaneously the package would exceed its PLCC thermal limits. De-rate to one or two active bridges per IC for continuous duty, or provide forced cooling. Place a contiguous copper pour directly under the PLCC body to reduce theta_JA.
Place the bulk motor supply decoupling capacitors (>= 47 uF aluminum polymer or ceramic) within 10 mm of each VSx pin pair to suppress switching transients. Route the high-current OUTx traces on the top side with a minimum of 0.5 mm copper width per ampere, and stitch the bottom layer with a solid ground pour. Keep logic traces (SPI, EN, DIR) routed away from the motor OUT traces to prevent capacitive coupling of dV/dt noise into the serial interface.
Do not exceed the 42 V absolute maximum motor supply; inductive flyback from a stalled motor can transiently exceed this rating even if the steady-state bus is below it. Add a TVS diode (e.g. 43 V SMA) on each VSx node. The integrated DC/DC switching regulators require external inductors and capacitors per the BOM section of the Freescale datasheet; do not assume they work without these parts. Confirm the SPI mode (CPOL/CPHA) and chip-select polarity against the datasheet timing diagram before connecting to a host MCU.
合规信息
RoHS, REACH, lead-free, and halogen-free status were not present in the verified web data and are marked unknown. The MC34920EI is rated for the commercial operating grade only and is not AEC-Q100 qualified.
