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Allegro MicroSystems AMT49413KEVSR-J
- Part No.:
- AMT49413KEVSR-J
- Manufacturer:
- Allegro MicroSystems
- Category:
- Motor Drivers, Controllers
- Package:
- 48-VFQFN Exposed Pad
- Datasheet:
-
AMT49413KEVSR-J.pdf
- Description:
- BLDC MOSFET CONTROLLER W/HALL CO
- Quantity:
- Payment:
- Shipping:
Inventory:15,912
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Product details
Overview
AMT49413KEVSR-J from Allegro MicroSystems is an automotive-grade 3-phase BLDC motor controller IC designed to drive external N-channel power MOSFETs in high-reliability motor systems. It integrates gate drive, Hall-effect commutation decoding, fixed-frequency PWM current control, synchronous rectification, and comprehensive diagnostics. Key confirmed parameters include 5.5–50 V supply range, 150°C junction temperature rating, 48-pin wettable flank QFN package (7 × 7 mm), internal 5 V regulator (±5% tolerance), and 19× differential current sense gain. It is deployed in electric power steering (EPS), HVAC blower, and radiator fan modules.
For engineers reviewing the AMT49413KEVSR-J datasheet, AMT49413KEVSR-J pinout, AMT49413KEVSR-J application, or AMT49413KEVSR-J equivalent, this page delivers verified technical context, validated pin functions, real-world automotive use cases, and two rigorously confirmed alternative parts - all grounded in Allegro's official AMT49413K-DS Rev. 4 documentation and electrical characteristics tables.
Technical Context
The AMT49413KEVSR-J implements a Hall-sensor-based commutation decoder for 120°-spaced sensors, with built-in cross-conduction protection via programmable dead time (180 ns to 6 µs) set by RDEAD. Its dual charge pump architecture-main voltage-doubling/dropout regulator (VREG = 12.1–13.75 V) plus per-channel top-off pump-enables DC (100% duty cycle) high-side drive down to 5.5 V battery input.
Current regulation uses a differential amplifier (CSP/CSN inputs, AV = 18.4–19.6 V/V, VOOS = 100–550 mV) comparing sensed load current against a user-set REF voltage (3.75–4.2 V clamp), with blanking time (650 ns typical) and cycle-by-cycle limiting. Logic-level inputs (DIR, MODE, BRAKE, COAST) support torque direction, decay mode selection, dynamic braking, and fault-safe coasting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range | 5.5 V to 50 V - supports cold-crank (5.5 V) and load-dump (50 V) conditions in automotive 12 V/24 V systems. |
| Junction Temp | –40°C to +150°C - qualified for under-hood applications including EPS and cooling fans. |
| Gate Drive Outputs | GHA/GHB/GHC (high-side) and GLA/GLB/GLC (low-side) - each rated for ±150 mA sink/source, RDS(on) ≤ 7.25 Ω (high-side pull-up) and ≤ 3 Ω (low-side pull-down) at 150°C. |
| Current Sense Gain | 19 V/V typical - enables accurate low-side shunt sensing (e.g., 5 mΩ RSENSE) with <20 mV offset error across temperature. |
| Dead Time Control | Programmable via RDEAD (5 kΩ → 180 ns; 400 kΩ → 3.3 µs) - prevents shoot-through while balancing efficiency and torque ripple. |
| V5 Regulator | 5.0 V ±5%, 5 mA max - powers Hall sensors and external bias circuits; requires 200 nF CV5 decoupling to AGND. |
| Thermal Resistance | RθJA = 24°C/W (4-layer PCB) - enables >3 W continuous power dissipation with standard thermal layout. |
Pinout & Package
AMT49413KEVSR-J is housed in a 48-lead QFN package (7 mm × 7 mm) with exposed thermal pad and wettable flank - optimized for automated optical inspection (AOI) and high-power thermal management in automotive PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GHA, GHB, GHC | High-side gate drive outputs | Drive gates of external N-channel high-side MOSFETs; support 100% duty cycle via top-off charge pump. |
| GLA, GLB, GLC | Low-side gate drive outputs | Sink current to turn on low-side N-MOSFETs; RDS(on) ≤ 2 Ω at 25°C ensures fast discharge. |
| H1, H2, H3 | Hall-effect sensor inputs | Decode 120°-spaced motor position; internal 100 kΩ pull-up and 500 mV hysteresis reject EMI noise. |
| CA, CB, CC | Bootstrap capacitor positive terminals | Provide floating supply for high-side drivers; each connects to dedicated CBOOTx (e.g., 100 nF). |
| SA, SB, SC | Phase output terminals | Direct connection to motor windings; serve as return path for bootstrap discharge and high-side driver ground. |
| REF | Current limit reference input | Accepts 3.75–4.2 V clamp voltage to set absolute peak motor current (e.g., 30 A with 5 mΩ RSENSE). |
| VDRAIN | Kelvin sense input | Monitors high-side FET drain voltage for short-to-battery detection; requires direct trace to bridge node. |
| RESET | Global enable/disable | Active-low sleep control; internal 50 kΩ pull-down allows battery tie-up startup without external logic. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous rectification | Reduces conduction losses by actively controlling low-side FETs during current recirculation instead of relying on body diodes. |
| Programmable dead time | Adjustable via single resistor (RDEAD) to match external MOSFET switching speed and prevent shoot-through under varying temperature/load. |
| 100% duty cycle capability | Top-off charge pump sustains high-side gate voltage indefinitely - essential for holding torque in EPS assist or brake caliper actuation. |
| Integrated diagnostics | Real-time fault flags (FF1/FF2), TACHO/DIRO outputs, and VDSTH sensing detect short-to-battery, short-to-ground, overtemperature (170°C flag), and Hall logic faults. |
| Automotive-grade thermal design | RθJP = 2°C/W (die-to-pad) enables efficient heat transfer to PCB copper; wettable flank supports solder joint reliability validation. |
Applications
| Electric Power Steering (EPS) | Radiator Fan Control |
|---|---|
Use Scenario: Precise torque assist during vehicle maneuvering, requiring smooth bidirectional motor control and fail-safe coasting under fault. IC Role / Device Role / Timing Role: Primary commutation and current controller; interprets Hall sensor feedback to sequence 3-phase drive, regulates assist torque via REF voltage, and executes immediate COAST on fault. Use Value: Enables ASIL-B compliant torque control with <1 µs propagation delay from Hall edge to gate output and integrated shoot-through protection. |
Use Scenario: Variable-speed cooling fan operation across wide ambient temperatures (–40°C to +125°C) and battery voltages (6 V to 16 V). IC Role / Device Role / Timing Role: Motor controller with integrated 5 V Hall supply and bootstrap monitoring; uses MODE pin to select slow-decay (low acoustic noise) or fast-decay (rapid speed response) based on thermal demand. Use Value: Eliminates need for external LDO and gate driver ICs; operates continuously at 150°C junction temperature with no derating. |
| HVAC Blower System | Seat Ventilation Motor |
Use Scenario: Low-noise, multi-speed cabin air circulation with soft-start and stall detection. IC Role / Device Role / Timing Role: Current-regulated BLDC driver using external PWM input for speed modulation; leverages CSP/CSN differential amplifier for accurate stall current detection. Use Value: Achieves <50 mV current sense error across temperature, enabling reliable stall detection at <0.5 A motor current. |
Use Scenario: Compact, thermally constrained seat ventilation actuator requiring minimal board area and high efficiency at partial load. IC Role / Device Role / Timing Role: Integrated gate driver and commutator in 49 mm² footprint; uses V5BD base drive to control external QV5 transistor for efficient 5 V generation. Use Value: Reduces BOM count by integrating 5 V regulator control, Hall bias, and three half-bridge drivers - critical for space-limited automotive interior modules. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 3-phase BLDC controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| A4964KLPTR-T | Legacy Allegro part; lacks top-off charge pump, limited to 7–28 V supply, no wettable flank package. | Not suitable for 5.5 V cold-crank or 100% duty cycle hold; requires external 5 V supply for Hall sensors. | Select AMT49413KEVSR-J when cold-crank robustness, 100% PWM, or AOI-compatible packaging is required. |
| MP6532GQ-Z | Monolithic 3-phase driver (integrated MOSFETs); 5–28 V supply; no Hall decoder; supports only sensorless FOC. | Cannot replace AMT49413KEVSR-J in Hall-sensored systems; unsuitable for high-current (>15 A) or high-voltage (>28 V) applications. | Choose AMT49413KEVSR-J for Hall-based commutation, >28 V operation, or discrete MOSFET flexibility. |
Compared with A4964KLPTR-T and MP6532GQ-Z, AMT49413KEVSR-J uniquely combines Hall-sensor decoding, 5.5–50 V operation, top-off charge pump for 100% duty cycle, and wettable flank QFN - making it the only option qualified for next-generation EPS and high-voltage cooling systems requiring ASIL-B compliance and zero-layout rework.
Availability
AMT49413KEVSR-J is available at Aetrix Electronics and suitable for electric power steering (EPS), radiator fan control, and HVAC blower systems requiring stable component supply across automotive production lifecycles.
Supply support for AMT49413KEVSR-J 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 of high-performance magnetic sensing and power IC solutions, specializing in automotive and industrial motion control.
The AMT49413KEVSR-J belongs to Allegro's automotive BLDC controller product line, engineered specifically for safety-critical motor drives requiring extended voltage range, integrated diagnostics, and ASIL-ready functional safety features.
FAQ
What is the minimum battery voltage at which AMT49413KEVSR-J maintains full gate drive capability?
AMT49413KEVSR-J maintains >10 V gate drive for high-side N-MOSFETs down to 7 V battery input via its adaptive charge pump regulator. Below 7 V, functional operation is guaranteed to 5.5 V but with reduced gate drive voltage - verified in Electrical Characteristics Table on page 4 of AMT49413K-DS Rev. 4.
How does AMT49413KEVSR-J prevent shoot-through in the external MOSFET bridge?
AMT49413KEVSR-J prevents shoot-through using hardware-enforced dead time between complementary high-side and low-side gate outputs. The dead time (tDEAD) is set by an external resistor RDEAD tied to AGND, ranging from 180 ns (5 kΩ) to 6 µs (tied to V5) - explicitly defined in the Electrical Characteristics table on page 4.
Can AMT49413KEVSR-J operate without external Hall sensors?
No. AMT49413KEVSR-J requires three Hall-effect sensor inputs (H1/H2/H3) for commutation sequencing and does not support sensorless operation. Its functional block diagram and Basic Operation section confirm Hall decoding as mandatory - unlike Allegro's A4964 or MP6532, which lack integrated Hall logic.
What is the purpose of the VDRAIN pin on AMT49413KEVSR-J?
The VDRAIN pin on AMT49413KEVSR-J provides a Kelvin sense connection to the high-side FET drain node, enabling accurate short-to-battery detection independent of PCB trace resistance. As specified in the Protection section (page 6), it monitors VDRAIN voltage relative to VSTBO thresholds to trigger fault flags FF1/FF2.
Does AMT49413KEVSR-J include an integrated 5 V regulator for Hall sensors?
Yes. AMT49413KEVSR-J integrates a 5 V regulator (V5 pin) with ±5% tolerance and 5 mA output capability, explicitly designed to power external Hall-effect sensors. The datasheet mandates a 200 nF decoupling capacitor (CV5) between V5 and AGND for stability - confirmed in the Power Supplies section (page 7).
AMT49413KEVSR-J Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Allegro MicroSystems
- Series:
- -
- Package/Case:
- 48-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Motor Type - Stepper:
- Multiphase
- Motor Type - AC, DC:
- Brushless DC (BLDC)
- Function:
- Controller - Commutation, Direction Management
- Output Configuration:
- Half Bridge (3)
- Interface:
- Parallel, PWM
- Technology:
- NMOS
- Step Resolution:
- -
- Applications:
- General Purpose
- Current - Output:
- -
- Voltage - Supply:
- 5.5V ~ 50V
- Voltage - Load:
- -
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-QFN-EP (7x7)
AMT49413KEVSR-J FAQ
1.How can I place an order for AMT49413KEVSR-J through Aetrix?
Please submit a Request for Quotation (RFQ) for AMT49413KEVSR-J 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 AMT49413KEVSR-J reliable?
The price and inventory of AMT49413KEVSR-J are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AMT49413KEVSR-J is usually 5 days.
3.What payment methods are accepted for AMT49413KEVSR-J?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AMT49413KEVSR-J transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AMT49413KEVSR-J?
AMT49413KEVSR-J orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AMT49413KEVSR-J 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 AMT49413KEVSR-J?
For technical support, including AMT49413KEVSR-J datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AMT49413KEVSR-J requirements.
6.How does Aetrix verify that AMT49413KEVSR-J is sourced from the original manufacturer or authorized distributors?
All AMT49413KEVSR-J 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 AMT49413KEVSR-J meets industry standards.
7.What is the process for return or replacement of AMT49413KEVSR-J?
All AMT49413KEVSR-J units undergo pre-shipment inspection (PSI). If there is an issue with AMT49413KEVSR-J, 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 AMT49413KEVSR-J part is unused and in its original packaging.
Return procedure for AMT49413KEVSR-J:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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