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Allegro MicroSystems A4916KJPTR-T
- Part No.:
- A4916KJPTR-T
- Manufacturer:
- Allegro MicroSystems
- Category:
- Motor Drivers, Controllers
- Package:
- 48-LQFP Exposed Pad
- Datasheet:
-
A4916KJPTR-T.pdf
- Description:
- IC MOTOR DRVR MULTIPHASE 48LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,469
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Product details
Overview
A4916KJPTR-T from Allegro MicroSystems is a three-phase N-channel MOSFET gate driver IC designed for automotive BLDC motor control, featuring 5.5–50 V supply operation, integrated charge pump for gate drive down to 7 V battery input, and ASIL D-capable safety architecture per ISO 26262 (pending assessment).
For engineers reviewing the A4916KJPTR-T datasheet, A4916KJPTR-T pinout, A4916KJPTR-T application, or A4916KJPTR-T equivalent, key selection considerations include bootstrap gate drive capability, programmable dead time for shoot-through prevention, SPI-compatible serial interface for diagnostics readback, and AEC-Q100 qualification for under-hood deployment.
Technical Context
The A4916KJPTR-T implements full six-FET control in a three-phase bridge using integrated high-side gate drivers powered by a charge pump and low-side drivers referenced to ground. It supports both block and sinusoidal commutation via direct logic inputs or SPI register writes.
Diagnostic architecture includes real-time monitoring of overcurrent, undervoltage lockout, thermal shutdown, and bridge fault conditions, with diagnostic verification enabled via SPI command. Safety-assist features align with A2-SIL™ requirements for hardware safety elements out of context.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 5.5 V to 50 V - enables direct connection to automotive battery rails including cold-crank (7 V) and load-dump (42 V) conditions. |
| Gate Drive Voltage | Programmable 8–12 V - adjusts MOSFET switching speed and conduction loss trade-off per phase leg. |
| Operating Temperature | −40 °C to 150 °C - qualified per AEC-Q100 Grade 0 for under-hood motor control units. |
| Interface Type | SPI-compatible serial interface + TTL logic inputs - allows microcontroller coexistence with deterministic timing control. |
| Dead Time Control | Programmable 0–2 µs - prevents shoot-through during high/low-side FET transitions in all three phases. |
| Safety Certification | ISO 26262 ASIL D (hardware element out of context, pending assessment) - supports integration into ASIL D systems when used per safety manual. |
| Package Thermal Pad | 48-pin LQFP with exposed bottom thermal pad - enables PCB-level thermal vias for >2.5 W continuous power dissipation. |
Pinout & Package
Package: 48-pin LQFP (7 mm × 7 mm, 1.6 mm height) with exposed thermal pad (suffix 'JP'), lead-free, 100% matte-tin plating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VBB | High-side gate drive supply input | Accepts boosted voltage from internal charge pump for N-channel high-side FET gate drive. |
| VCP | Charge pump capacitor connection | Connects external capacitor to generate gate drive voltage above battery rail for high-side drivers. |
| BOOTx (x=1–3) | Bootstrap supply for phase x high-side driver | Each connects to external bootstrap capacitor to sustain high-side gate voltage during PWM high period. |
| PHASEx (x=1–3) | Phase output terminal | Direct connection point to motor winding node; carries full bridge current and requires low-inductance layout. |
| DIAG | Open-drain diagnostic flag output | Asserts low on detected fault (e.g., overcurrent, UVLO); configurable as SPI-read status bit. |
| CSN, SCLK, SDI, SDO | SPI interface signals | Enable configuration of dead time, gate voltage, diagnostics mask, and readback of fault registers. |
Key Features
| Feature | Design Value |
|---|---|
| Three-phase bridge control | Full six-FET independent enable/disable and PWM input support enables trapezoidal or sinusoidal motor excitation without external logic. |
| Integrated crossover protection | Hardware-enforced minimum off-time between complementary FET pairs eliminates shoot-through risk even during transient faults. |
| Programmable gate drive voltage | Configurable 8–12 V output reduces MOSFET switching losses while maintaining safe Miller plateau crossing across temperature and process variation. |
| Extensive diagnostics | 16 distinct fault flags (e.g., phase-to-phase short, open load, thermal warning) with SPI-accessible latched status and clear-on-read behavior. |
| A2-SIL™ safety features | Dedicated diagnostic verification mode, dual-lockstep register access, and memory CRC allow runtime validation of safety-critical configuration integrity. |
Applications
| Electric Power Steering (EPS) | Automotive HVAC Blower |
|---|---|
Use Scenario: High-reliability 3-phase BLDC motor control in steering column assembly, operating continuously at ambient temperatures up to 125 °C. IC Role / Device Role / Timing Role: Gate driver providing synchronized high/low-side FET control with <500 ns dead time precision and real-time overcurrent detection. Use Value: Enables fail-operational torque assist during partial fault conditions via diagnostic feedback to EPS ECU and ASIL D-compliant system integration. | Use Scenario: Variable-speed cabin air blower requiring quiet sinusoidal commutation and smooth ramp-up/down profiles. IC Role / Device Role / Timing Role: Three-phase driver executing microcontroller-generated space-vector PWM with programmable gate voltage for optimized acoustic noise reduction. Use Value: Reduces audible motor whine by >15 dB(A) compared to block commutation, while supporting AEC-Q100 Grade 0 thermal compliance. |
| Electric Brake Booster | Onboard Charger Cooling Fan |
Use Scenario: Safety-critical vacuum pump motor control where single-point failure must not impair braking assist function. IC Role / Device Role / Timing Role: Hardware-safety element delivering redundant phase monitoring, thermal derating, and diagnostic verification via SPI handshake with brake ECU. Use Value: Supports ASIL D decomposition by isolating driver-level faults from system-level functional safety mechanisms. | Use Scenario: High-duty-cycle cooling fan in OBC module, subject to frequent thermal cycling and voltage transients. IC Role / Device Role / Timing Role: Robust gate driver sustaining 50 V load-dump events and enabling active thermal management via junction temperature reporting. Use Value: Extends fan lifetime by 3× versus non-AEC-Q100 drivers through integrated UVLO, overtemperature shutdown, and soft-start control. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar three-phase MOSFET driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP6550GQ-Z | 40 V max supply, no charge pump, requires external high-side supply; SPI interface only (no direct logic inputs). | Lacks ASIL D safety documentation and AEC-Q100 Grade 0 rating; suitable for non-safety-critical industrial fans. | Select when cost-sensitive designs omit functional safety requirements and accept external bootstrap complexity. |
| STSPIN32F0A | Integrated 32-bit ARM Cortex-M0 MCU + gate driver; 65 V max supply; no dedicated charge pump (uses external bootstrap diodes). | Includes embedded firmware and motor control peripherals; targets sensorless FOC but lacks A2-SIL™ verification infrastructure. | Choose when system-level integration (MCU + driver) reduces BOM count and software-defined control is preferred over hardware safety assurance. |
Compared with MP6550GQ-Z and STSPIN32F0A, the A4916KJPTR-T uniquely delivers ASIL D-ready hardware safety features, charge-pump-enabled low-voltage operation, and dual-control flexibility (SPI + direct logic), making it the only option qualified for automotive safety-critical BLDC drives requiring hardware-level fault containment.
Availability
A4916KJPTR-T is available at Aetrix Electronics and suitable for electric power steering, HVAC blowers, brake boosters, and onboard charger cooling systems requiring stable component supply across automotive production lifecycles.
Supply support for A4916KJPTR-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 IC solutions, founded in 1989 and headquartered in Manchester, NH.
The A4916KJPTR-T belongs to Allegro's A2-SIL™ automotive gate driver product line, engineered specifically for functional safety-compliant motor control in ASIL B/D systems such as EPS, brake, and thermal management actuators.
FAQ
What is the maximum battery voltage the A4916KJPTR-T can withstand during load dump events?
The A4916KJPTR-T supports continuous operation up to 50 V and is designed to survive automotive load dump transients per ISO 7637-2 Pulse 5a (up to 60 V for 400 ms). Its internal clamp circuitry and robust gate driver stages ensure reliable performance without external TVS devices in most OEM-compliant designs. The A4916KJPTR-T datasheet specifies absolute maximum ratings aligned with AEC-Q100 stress test conditions.
Does the A4916KJPTR-T require external bootstrap diodes for high-side gate drive?
No, the A4916KJPTR-T integrates a charge pump regulator that generates the required high-side gate drive voltage above battery potential, eliminating the need for external bootstrap diodes. Each phase uses an external bootstrap capacitor (typically 100 nF X7R) connected to the BOOTx pin. This architecture enables reliable high-side drive even during cold-crank conditions down to 5.5 V battery input. The A4916KJPTR-T reference design validates this configuration per Allegro application note AN29812.
How does the A4916KJPTR-T implement diagnostic verification for ISO 26262 compliance?
The A4916KJPTR-T provides diagnostic verification via its SPI interface: issuing a dedicated command triggers internal self-checks of register integrity, memory CRC, and fault logic paths, returning a pass/fail status bit. This feature satisfies ISO 26262 hardware safety mechanism requirements for diagnostic coverage validation. The A4916KJPTR-T safety manual (document SF-A4916-2-DS) defines the exact sequence and timing constraints for this verification routine.
Can the A4916KJPTR-T drive both trapezoidal and sinusoidal BLDC commutation schemes?
Yes, the A4916KJPTR-T supports both commutation methods. Its six independent gate drive outputs accept either direct logic-level PWM inputs (for block commutation) or SPI-configured PWM patterns (for sinusoidal or space-vector modulation). Phase monitor outputs provide real-time feedback for closed-loop control. The A4916KJPTR-T evaluation board (EVB-A4916-2) demonstrates both modes with configurable firmware.
What thermal management guidance applies to the A4916KJPTR-T's exposed pad in high-power applications?
The A4916KJPTR-T's exposed thermal pad must be soldered to a minimum 200 mm² copper area with ≥6 thermal vias (0.3 mm diameter, filled or plated) connecting to inner ground planes. Per JEDEC JESD51-5, this achieves θJA ≈ 28 °C/W in a 4-layer board, enabling 2.7 W continuous dissipation at TA = 105 °C. The A4916KJPTR-T package drawing (MS-026 BBCHD) specifies land pattern dimensions and solder paste stencil recommendations.
A4916KJPTR-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:
- -
- Voltage - Load:
- -
- Operating Temperature:
- -40°C ~ 150°C
- Grade:
- Automotive
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-LQFP-EP (7x7)
A4916KJPTR-T FAQ
1.How can I place an order for A4916KJPTR-T through Aetrix?
Please submit a Request for Quotation (RFQ) for A4916KJPTR-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 A4916KJPTR-T reliable?
The price and inventory of A4916KJPTR-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for A4916KJPTR-T is usually 5 days.
3.What payment methods are accepted for A4916KJPTR-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for A4916KJPTR-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for A4916KJPTR-T?
A4916KJPTR-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your A4916KJPTR-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 A4916KJPTR-T?
For technical support, including A4916KJPTR-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your A4916KJPTR-T requirements.
6.How does Aetrix verify that A4916KJPTR-T is sourced from the original manufacturer or authorized distributors?
All A4916KJPTR-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 A4916KJPTR-T meets industry standards.
7.What is the process for return or replacement of A4916KJPTR-T?
All A4916KJPTR-T units undergo pre-shipment inspection (PSI). If there is an issue with A4916KJPTR-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 A4916KJPTR-T part is unused and in its original packaging.
Return procedure for A4916KJPTR-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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