MC34920EI - Quad H-Bridge Motor Driver, 1.5A, 44-PLCC | NXP
Référence : MC34920EI ✗ Fin de vie| Qté | Prix unitaire | Total |
|---|---|---|
| 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 Présentation
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.
Alternatives de remplacement direct pour MC34920EI — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
MC34920EI
✅ Remplacement direct✓ En stock
$9.28 / unité
Voir la fiche technique →MC34920EIR2
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
MC34920CFN
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
MPC17520DC
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
MC34920EI Valeurs maximales et caractéristiques électriques
| Fonction | Quad H-Bridge Motor Driver |
| Motor Type | Bipolar DC, Stepper, Solenoid |
| Nombre de sorties | 2 (quad H-bridge) |
| Topologie | H-Bridge (4 full bridges) |
| Configuration de sortie | Half-Bridge / Full-Bridge |
| Tension d'alimentation | 21 V to 42 V |
| Continuous Output Current | 1.5 A per channel |
| On-Resistance (Typ) | 2.8 ohm per FET |
| Interface | Serial (SPI-compatible) |
| Integrated DC/DC Regulators | Yes (2 switching regulators on-chip) |
| Integrated Reset Circuit | Yes |
| Integrated Sense Circuit | Yes (2) |
| Boîtier | 44-PLCC (16.59 x 16.59 mm) |
| Type de montage | Surface Mount |
| Operating Temperature Grade | Commercial |
Configuration des broches de MC34920EI
| Broche 1 | OUT1A — H-bridge 1 output A |
| Broche 2 | OUT1B — H-bridge 1 output B |
| Broche 3 | VS1 — Bridge 1 motor supply |
| Broche 4 | GND — Ground |
| Broche 5 | OUT2A — H-bridge 2 output A |
| Broche 6 | OUT2B — H-bridge 2 output B |
| Broche 7 | VS2 — Bridge 2 motor supply |
| Broche 8 | GND — Ground |
| Broche 9 | OUT3A — H-bridge 3 output A |
| Broche 10 | OUT3B — H-bridge 3 output B |
| Broche 11 | VS3 — Bridge 3 motor supply |
| Broche 12 | GND — Ground |
| Broche 13 | OUT4A — H-bridge 4 output A |
| Broche 14 | OUT4B — H-bridge 4 output B |
| Broche 15 | VS4 — Bridge 4 motor supply |
| Broche 16 | GND — Ground |
| Broche 17 | VS — Logic supply |
| Broche 18 | VDD — Regulated logic supply output |
| Broche 19 | GND — Ground |
| Broche 20 | SENSE1 — Current sense input 1 |
| Broche 21 | SENSE2 — Current sense input 2 |
| Broche 22 | RESET — Reset output to host MCU |
| Broche 23 | MOSI — SPI data input |
| Broche 24 | MISO — SPI data output |
| Broche 25 | SCLK — SPI clock |
| Broche 26 | CS — SPI chip select |
| Broche 27 | FAULT — Fault output (open drain) |
| Broche 28 | EN1 — Bridge 1 enable |
| Broche 29 | EN2 — Bridge 2 enable |
| Broche 30 | EN3 — Bridge 3 enable |
| Broche 31 | EN4 — Bridge 4 enable |
| Broche 32 | DIR1 — Bridge 1 direction control |
| Broche 33 | DIR2 — Bridge 2 direction control |
| Broche 34 | DIR3 — Bridge 3 direction control |
| Broche 35 | DIR4 — Bridge 4 direction control |
| Broche 36 | PWM1 — Bridge 1 PWM input |
| Broche 37 | PWM2 — Bridge 2 PWM input |
| Broche 38 | PWM3 — Bridge 3 PWM input |
| Broche 39 | PWM4 — Bridge 4 PWM input |
| Broche 40 | DCDCVIN — Switching regulator 1 input |
| Broche 41 | DCDCVOUT1 — Switching regulator 1 output |
| Broche 42 | DCDCVIN2 — Switching regulator 2 input |
| Broche 43 | DCDCVOUT2 — Switching regulator 2 output |
| Broche 44 | NC — Not connected (per datasheet) |
Applications typiques
MC34920EI convient pour 6 applications: 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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour MC34920EI — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | 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 |
Principaux différenciateurs
- Quad H-bridge integration plus dual on-chip switching regulators (vs MPC17520DC)
- High motor supply voltage range (vs MPC17520DC)
- SPI serial control interface (vs MPC17520DC)
Notes de conception
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.
Informations de conformité
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.
