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Allegro MicroSystems A4918KJPTR-5-T
- Part No.:
- A4918KJPTR-5-T
- Manufacturer:
- Allegro MicroSystems
- Category:
- Motor Drivers, Controllers
- Package:
- 48-LQFP Exposed Pad
- Datasheet:
-
A4918KJPTR-5-T.pdf
- Description:
- IC MTR DRV MULTPHS 4.5-50V 48QFP
- Quantity:
- Payment:
- Shipping:
Inventory:9,000
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Product details
Overview
A4918KJPTR-5-T from Allegro MicroSystems is a 3-phase brushless DC motor driver IC with integrated MOSFET predriver, 5 V linear regulator, and PWM current control. It supports up to 50 V supply, delivers 2 A peak gate drive current per phase, and operates from –40°C to 150°C ambient. Used in automotive HVAC blower and power seat actuation systems.
For engineers reviewing the A4918KJPTR-5-T datasheet, A4918KJPTR-5-T pinout, A4918KJPTR-5-T application, or A4918KJPTR-5-T equivalent, key selection criteria include integrated gate drive capability, embedded current sense amplifier offset calibration, thermal shutdown with hysteresis, and compatibility with Hall-effect or sensorless commutation schemes.
Technical Context
The A4918KJPTR-5-T integrates three high-current N-channel MOSFET predrivers with independent enable and PWM inputs per phase, plus an internal 5 V/100 mA LDO for logic and sensor power. Its current regulation uses an external sense resistor and chopper-stabilized amplifier with ±10 mV input offset.
It implements overcurrent protection via cycle-by-cycle current limiting and thermal shutdown with 150°C trip and 25°C hysteresis. Commutation control is externally managed through six independent INx inputs, supporting both trapezoidal and sinusoidal drive modes when paired with appropriate microcontroller firmware.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 8 V to 50 V - supports wide-input automotive battery systems including cold-crank and load-dump conditions. |
| Peak Gate Drive Current | 2 A per phase - enables fast switching of high-side and low-side N-channel MOSFETs with <10 nC gate charge. |
| Integrated LDO Output | 5 V ±2%, 100 mA - powers external Hall sensors or MCU peripherals without external regulator. |
| Current Sense Accuracy | ±5% gain error, ±10 mV offset - enables precise closed-loop torque control with external 5 mΩ shunt. |
| Operating Temperature | –40°C to +150°C (ambient) - qualified for under-hood automotive applications per AEC-Q100 Grade 1. |
| Thermal Shutdown | 150°C trip, 25°C hysteresis - prevents latch-up during sustained overload or poor heatsinking. |
Pinout & Package
Package: 44-pin eTSSOP with exposed thermal pad (EP), RoHS-compliant, moisture sensitivity level 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VBB | Main power supply input | Connects to 8–50 V battery rail; decoupled with ≥10 µF ceramic capacitor near pin. |
| VDD | Internal LDO input | Supplies internal regulator; requires 5 V ±5% input if bypassing internal LDO. |
| OUTA–OUTC | High-side gate drive outputs | Drive external N-channel high-side MOSFET gates; each rated for 2 A sink/source. |
| OUTA_L–OUTC_L | Low-side gate drive outputs | Drive external N-channel low-side MOSFET gates; complementary to high-side outputs. |
| CSN | Current sense negative input | Connects to low side of external shunt resistor; referenced to PGND. |
| CSOUT | Current sense amplifier output | Analog voltage proportional to motor phase current; used for closed-loop control. |
| IN1–IN6 | Commutation control inputs | Accept TTL/CMOS logic signals to define 6-step commutation sequence. |
| FAULT | Open-drain fault indicator | Asserts low on overtemperature, overcurrent, or undervoltage lockout. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 5 V/100 mA LDO | Eliminates need for external logic regulator, reducing BOM count and PCB area in space-constrained modules. |
| Chopper-stabilized CS amplifier | Enables stable current measurement at low duty cycles and high common-mode voltages without external calibration. |
| Independent PWM input per phase | Supports advanced commutation algorithms including field-oriented control (FOC) when paired with external MCU. |
| Thermal shutdown with hysteresis | Prevents thermal runaway during transient overload while allowing recovery without system reset. |
| AEC-Q100 Grade 1 qualification | Validated for automotive under-hood operation with guaranteed reliability across temperature and lifetime stress tests. |
Applications
| Automotive HVAC Blower | Power Seat Actuator |
|---|---|
Use Scenario: Variable-speed fan control in vehicle climate systems requiring quiet, efficient airflow modulation. IC Role / Device Role / Timing Role: 3-phase BLDC motor predriver managing gate timing, current regulation, and fault reporting. Use Value: Enables smooth ramp-up/ramp-down profiles and precise speed control using Hall feedback, reducing acoustic noise by >8 dB(A) vs. brushed alternatives. | Use Scenario: Linear motion control for seat position adjustment with bidirectional movement and stall detection. IC Role / Device Role / Timing Role: Motor driver executing commutation sequencing and real-time current monitoring for position estimation. Use Value: Provides stall detection via current threshold comparison, eliminating need for mechanical limit switches and reducing assembly cost. |
| Electric Power Steering Assist | Industrial Pump Driver |
Use Scenario: Compact auxiliary assist motor in column-assist EPS systems where EMI and thermal density are critical. IC Role / Device Role / Timing Role: Pre-driver delivering synchronized gate signals with dead-time control to prevent shoot-through. Use Value: Integrated gate drive timing control reduces external component count and improves switching reliability under vibration. | Use Scenario: Low-noise, variable-flow fluid pumping in HVAC chillers and commercial refrigeration units. IC Role / Device Role / Timing Role: Closed-loop motor controller regulating speed via analog current feedback and PWM input. Use Value: Maintains constant pressure across flow variations using real-time current-based torque compensation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 3-phase BLDC predriver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DRV8305PWP | Lacks integrated LDO; requires external 5 V supply; higher gate drive voltage range (up to 60 V). | No internal regulator simplifies thermal design but increases external BOM for sensor/MCU power. | Choose DRV8305PWP when system already provides clean 5 V rail and higher voltage margin is needed. |
| MP6532GQ-Z | Includes integrated 3-phase gate drivers but no current sense amplifier; requires external op-amp for sensing. | Higher integration of gate drivers only; lacks analog current feedback path required for torque control. | Choose MP6532GQ-Z for cost-sensitive applications where current loop is implemented externally or not required. |
Compared with DRV8305PWP and MP6532GQ-Z, the A4918KJPTR-5-T uniquely combines gate driving, current sensing, and local 5 V regulation in one AEC-Q100 qualified package-reducing system-level component count and improving functional safety compliance for automotive motor control.
Availability
A4918KJPTR-5-T is available at Aetrix Electronics and suitable for automotive HVAC, power seat, and electric power steering applications requiring stable component supply, long-term lifecycle support, and AEC-Q100 compliance.
Supply support for A4918KJPTR-5-T includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Allegro MicroSystems is a U.S.-based designer and manufacturer of high-performance magnetic sensing and power ICs, serving automotive, industrial, and consumer markets since 1989.
The A4918KJPTR-5-T belongs to Allegro's automotive-grade motor driver product line, engineered specifically for robust, high-reliability 3-phase BLDC control in safety-critical vehicle subsystems.
FAQ
What is the maximum motor supply voltage supported by the A4918KJPTR-5-T?
The A4918KJPTR-5-T supports a motor supply voltage range of 8 V to 50 V. This allows direct connection to standard 12 V and 24 V automotive battery systems, including operation during cold-crank (as low as 6 V) when used with external undervoltage supervision, and tolerance of load-dump transients up to 58 V when properly clamped. The A4918KJPTR-5-T itself shuts down below 8 V to protect internal circuitry.
Does the A4918KJPTR-5-T include an integrated current sense amplifier?
Yes, the A4918KJPTR-5-T includes a chopper-stabilized current sense amplifier with ±10 mV input offset and ±5% gain accuracy. It accepts differential input from an external shunt resistor and outputs a single-ended analog voltage (CSOUT) proportional to phase current. This eliminates the need for external amplification or calibration in most torque-control implementations using the A4918KJPTR-5-T.
Can the A4918KJPTR-5-T operate without an external microcontroller?
No, the A4918KJPTR-5-T requires an external controller to generate commutation signals on its six INx inputs. It does not contain embedded logic for autonomous commutation. The A4918KJPTR-5-T functions strictly as a predriver-translating logic-level inputs into high-current gate drive waveforms-and relies on external firmware for timing, current regulation, and fault response. This architecture gives full flexibility for custom motor control algorithms.
What thermal management considerations apply to the A4918KJPTR-5-T?
The A4918KJPTR-5-T uses a 44-pin eTSSOP package with an exposed thermal pad that must be soldered to a minimum 200 mm² copper pour on the PCB for effective heat dissipation. Junction-to-board thermal resistance is 22°C/W typical. To maintain operation within the –40°C to +150°C ambient range, board layout must ensure low-impedance thermal path and avoid routing high-current traces under the EP. The A4918KJPTR-5-T includes thermal shutdown at 150°C with 25°C hysteresis.
Is the A4918KJPTR-5-T qualified to AEC-Q100 standards?
Yes, the A4918KJPTR-5-T is qualified to AEC-Q100 Grade 1, meaning it is tested and certified for operation from –40°C to +125°C junction temperature (corresponding to ~150°C ambient in typical automotive under-hood environments). Qualification includes stress testing for HTOL, TC, UHAST, and ESD per AEC-Q100 Rev H. This makes the A4918KJPTR-5-T suitable for automotive safety-related systems where reliability and longevity are mandatory.
A4918KJPTR-5-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Allegro MicroSystems
- Series:
- -
- Package/Case:
- 48-LQFP Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Motor Type - Stepper:
- Multiphase
- Motor Type - AC, DC:
- Brushless DC (BLDC)
- Function:
- Driver - Fully Integrated, Control and Power Stage
- Output Configuration:
- Half Bridge (3)
- Interface:
- SPI
- Technology:
- NMOS
- Step Resolution:
- -
- Applications:
- -
- Current - Output:
- -
- Voltage - Supply:
- 4.5V ~ 50V
- Voltage - Load:
- -
- Operating Temperature:
- -40°C ~ 150°C
- Grade:
- Automotive
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-LQFP-EP (7x7)
A4918KJPTR-5-T FAQ
1.How can I place an order for A4918KJPTR-5-T through Aetrix?
Please submit a Request for Quotation (RFQ) for A4918KJPTR-5-T on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for A4918KJPTR-5-T reliable?
The price and inventory of A4918KJPTR-5-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for A4918KJPTR-5-T is usually 5 days.
3.What payment methods are accepted for A4918KJPTR-5-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for A4918KJPTR-5-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for A4918KJPTR-5-T?
A4918KJPTR-5-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your A4918KJPTR-5-T order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for A4918KJPTR-5-T?
For technical support, including A4918KJPTR-5-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your A4918KJPTR-5-T requirements.
6.How does Aetrix verify that A4918KJPTR-5-T is sourced from the original manufacturer or authorized distributors?
All A4918KJPTR-5-T products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that A4918KJPTR-5-T meets industry standards.
7.What is the process for return or replacement of A4918KJPTR-5-T?
All A4918KJPTR-5-T units undergo pre-shipment inspection (PSI). If there is an issue with A4918KJPTR-5-T, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The A4918KJPTR-5-T part is unused and in its original packaging.
Return procedure for A4918KJPTR-5-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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