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Allegro MicroSystems AMT49107KEVSR-3-T
- Part No.:
- AMT49107KEVSR-3-T
- Manufacturer:
- Allegro MicroSystems
- Category:
- Gate Drivers
- Package:
- 48-VFQFN Exposed Pad
- Datasheet:
-
AMT49107KEVSR-3-T.pdf
- Description:
- IC GATE DRVR HALF-BRIDGE 48VFQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,000
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Product details
Overview
AMT49107KEVSR-3-T from Allegro MicroSystems is an AEC-Q100 qualified, ASIL-D SEooC automotive three-phase N-channel MOSFET driver for BLDC motor control. It delivers programmable gate drive strength (±240 mA to ±2.2 A peak), supports 4.5–50 V supply range, enables 100% PWM duty cycle via integrated VCP charge pump and bootstrap architecture, and operates in –40°C to 150°C ambient for under-hood traction and HVAC blower applications.
For engineers reviewing the AMT49107KEVSR-3-T datasheet, AMT49107KEVSR-3-T pinout, AMT49107KEVSR-3-T application, or AMT49107KEVSR-3-T equivalent, this page provides verified technical context on 3-phase bridge control logic, diagnostic verification capability, dead-time programmability (0.1–6.35 µs), SPI-configurable fault masking, and wettable-flank QFN thermal performance - all critical for ISO 26262-compliant motor drive design.
Technical Context
The AMT49107KEVSR-3-T implements dual charge pump regulation: a VREG pump generating 11–14.5 V for low-side gate drive and logic, and a VCP pump delivering up to 15.2 V referenced to VBRG for high-side bootstrap operation down to 4.5 V battery input. Its six independent gate drivers feature matched propagation delay (<15 ns phase-to-phase), active pull-down resistance (0.3–20 Ω), and programmable turn-on/turn-off currents across two stages.
Diagnostic architecture includes on-line verification of VREG, VCP, VBRG, temperature, and ENABLE/Q&A watchdogs via serial interface; fault action is configurable per monitor (latch, pulse, or ignore); and safety-critical diagnostics are verifiable under host control per ISO 26262 Annex D requirements for SEooC integration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBB Operating Range | 4.5–50 V: Enables direct connection to 12 V/24 V automotive batteries with brownout tolerance down to 3.5 V (outputs disabled) and safe no-fault operation at 0 V. |
| Gate Drive Output Current | ±2.2 A peak sink/source (HS/LS): Supports fast switching of high-Qg MOSFETs while maintaining <250 ns turn-off time at 30 nF load. |
| Dead Time Programmability | 0.1–6.35 µs: Configurable via 6-bit register to prevent shoot-through in high-dV/dt inductive loads without fixed hardware delay. |
| Diagnostic Verification | On-line & off-line verification of 22+ monitors (e.g., VREG UV/OV, VCP UV, TJ warning/fault, ENABLE timeout): Confirmed via serial interface for ASIL-D integration validation. |
| Thermal Resistance | RθJA = 24 °C/W (4-layer PCB): Enables >3 W continuous power dissipation at 150°C ambient with standard JEDEC layout. |
| Logic I/O Voltage | 3.3 V nominal (VIO = 3.1–3.5 V): Matches standard automotive microcontroller GPIO levels; supports 5 V logic variant (AMT49107KEVSR-5-T). |
| Safety Certification | AEC-Q100 Grade 0 (–40°C to +150°C), ASIL-D SEooC per ISO 26262:2018 Part 4 Annex D: Validated for use as safety element out-of-context in motor control systems. |
Pinout & Package
AMT49107KEVSR-3-T is housed in a 7 mm × 7 mm, 0.9 mm nominal height, 48-terminal wettable flank QFN package (suffix EV) with exposed thermal pad (PAD) connected to GND. The package is Pb-free with 100% matte-tin leadframe plating and optimized for automated optical inspection (AOI) and solder joint reliability in automotive reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GHA, GHB, GHC | High-side gate drive outputs | Drive N-MOSFET gates above battery voltage using bootstrap capacitors (CA/CB/CC); support 100% duty cycle via VCP charge pump. |
| GLA, GLB, GLC | Low-side gate drive outputs | Source-referenced outputs powered by VREG (11–14.5 V); enable fast turn-off with active pull-down (0.3–20 Ω). |
| HA, HB, HC, LA, LB, LC | Direct logic control inputs | Accept 3.3 V or 5 V logic (VIO-selectable); include internal 30–77 kΩ pull-down for robust noise immunity in vehicle harness environments. |
| CP1–CP4, CP5–CP6, VREG, VCP | Charge pump terminals | VREG pump (CP1–CP4) powers internal logic; VCP pump (CP5/CP6/VCP) generates high-side floating supply referenced to VBRG. |
| DIAG, SDO, SCK, STRn, SDI | Serial interface & diagnostic output | SPI-compatible 4-wire interface (STRn = chip select); DIAG provides configurable fault pulses, temperature voltage, or clock output per DG[1:0] setting. |
| VBRG, SA/SB/SC, LSSA/LSSB/LSSC | Bridge monitoring & connections | VBRG senses high-side drain voltage; SA/SB/SC connect to motor phases; LSSx returns low-side source current for accurate VDS monitoring. |
Key Features
| Feature | Design Value |
|---|---|
| Bootstrap gate drive with VCP charge pump | Enables 100% PWM duty cycle and high-side N-MOSFET operation even at 4.5 V battery, eliminating need for external high-voltage bias supplies. |
| Programmable gate drive strength | Two-stage current programming (±16–240 mA / ±600–2200 mA) reduces EMI during commutation transitions without sacrificing switching speed. |
| ASIL-D diagnostic verification | Serial interface allows host MCU to trigger and confirm operation of 22+ internal monitors (e.g., VCP undervoltage, overtemperature), fulfilling ISO 26262 diagnostic coverage requirements. |
| Configurable dead time & crossover protection | 6-bit programmable dead time (0.1–6.35 µs) plus hardware-enforced cross-conduction prevention ensures robust shoot-through immunity across temperature and voltage extremes. |
| Wettable flank QFN package | 48-pin 7×7 mm EV package with side-wettable flanks enables automated AOI of solder joints - critical for zero-defect automotive manufacturing. |
Applications
| Electric Power Steering (EPS) | Automotive HVAC Blower |
|---|---|
|
Use Scenario: Driving 3-phase BLDC motor in column-assist EPS system with torque ripple <5% and response time <20 ms. IC Role / Device Role / Timing Role: Primary 3-phase gate driver controlling six external N-MOSFETs; manages commutation timing, dead time, and real-time VDS-based overcurrent detection. Use Value: Integrated VCP charge pump sustains 100% duty cycle during hold torque events; ASIL-D diagnostics meet ISO 26262 ASIL C decomposition requirements. |
Use Scenario: Controlling variable-speed cabin blower motor in engine-off battery-only mode (9–16 V battery range). IC Role / Device Role / Timing Role: High-efficiency MOSFET driver with ultra-low quiescent current (18 µA sleep mode) and wide VBB range (4.5–50 V) for start-stop compatibility. Use Value: Bootstrap architecture eliminates external DC-DC for high-side drive; VREG regulator powers external isolators, reducing BOM count by one IC. |
| Electric Coolant Pump | Traction Inverter Auxiliary Stage |
|
Use Scenario: Regulating coolant flow in 48 V mild-hybrid thermal management system with >150,000-hour lifetime requirement. IC Role / Device Role / Timing Role: Fault-tolerant gate driver with open-load detection, bootstrap capacitor UV monitoring, and VBRG-based VDS sensing for pump stall protection. Use Value: RθJA = 24 °C/W enables full-power operation at 150°C ambient; wettable flank QFN ensures solder joint reliability over 2000 thermal cycles. |
Use Scenario: Driving auxiliary 3-phase motor for oil pump or cabin compressor in main traction inverter housing (125°C case temp). IC Role / Device Role / Timing Role: Secondary gate driver controlled via SPI from main MCU; provides isolated diagnostics reporting and synchronized dead-time adjustment. Use Value: Serial interface allows dynamic dead time tuning based on junction temperature; diagnostic registers feed into central safety manager for end-to-end fault coverage. |
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 |
|---|---|---|---|
| STSPIN32F0B | Integrated 32-bit ARM Cortex-M0 MCU + gate driver; no VCP charge pump; max VBB = 45 V; RθJA = 35 °C/W. | Best for cost-sensitive, lower-power (<500 W) applications where embedded control and sensor fusion are required. | Select when firmware-defined commutation (FOC/sinusoidal) and on-chip current sensing are needed; not suitable for 100% duty cycle or ASIL-D diagnostic verification. |
| DRV8305-Q1 | Single-chip 3-phase driver with integrated buck regulator; no serial diagnostic verification; max VBB = 45 V; RθJA = 28 °C/W. | Targeted at mid-power (1–3 kW) HVAC and seat control; lacks ASIL-D SEooC qualification and off-line verification capability. | Select for simplified layout with integrated 3.3 V LDO and basic fault reporting; avoid where ISO 26262 tool certification and diagnostic traceability are mandatory. |
Compared with STSPIN32F0B and DRV8305-Q1, the AMT49107KEVSR-3-T uniquely delivers ASIL-D SEooC compliance with serial-verifiable diagnostics, 100% PWM support via VCP, and superior thermal performance (RθJA = 24 °C/W), making it the only option qualified for high-reliability, safety-critical automotive motor control where diagnostic coverage and long-term stability are non-negotiable.
Availability
AMT49107KEVSR-3-T is available at Aetrix Electronics and suitable for electric power steering, HVAC blower, and electric coolant pump applications requiring stable component supply, AEC-Q100 Grade 0 qualification, and ISO 26262-compliant diagnostic traceability.
Supply support for AMT49107KEVSR-3-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, serving automotive, industrial, and consumer markets since 1989.
The AMT49107KEVSR-3-T belongs to Allegro's automotive-grade smart gate driver product line, engineered specifically for functional-safety-critical BLDC motor control in demanding under-hood environments.
FAQ
What is the minimum battery voltage at which AMT49107KEVSR-3-T maintains full gate drive functionality?
The AMT49107KEVSR-3-T maintains full gate drive functionality-including high-side bootstrap operation and 100% PWM duty cycle-down to 4.5 V VBB. Below that, outputs disable at 3.5 V (functional shutdown), but the device remains powered and fault-reporting capable down to 0 V VBB, ensuring fail-safe behavior during deep battery sag events.
How does AMT49107KEVSR-3-T implement ASIL-D compliance without an integrated MCU?
The AMT49107KEVSR-3-T achieves ASIL-D compliance as a Safety Element out of Context (SEooC) per ISO 26262 Annex D. Its diagnostic architecture-including on-line/off-line verification of VREG, VCP, temperature, and watchdogs via SPI-is fully testable by an external host MCU, enabling end-to-end fault coverage without on-chip processing.
Can AMT49107KEVSR-3-T drive both N-channel and P-channel high-side MOSFETs?
The AMT49107KEVSR-3-T is designed exclusively for N-channel high-side MOSFETs using bootstrap or VCP charge pump architecture. It does not support P-channel high-side configurations, as its GHA/GHB/GHC outputs are sourced from VCX (bootstrap voltage) and lack the negative rail required for P-MOS gate drive.
What is the purpose of the wettable flank feature in the AMT49107KEVSR-3-T QFN package?
The wettable flank feature on the AMT49107KEVSR-3-T's 48-pin QFN package exposes vertical copper surfaces along each side of the package body, enabling automated optical inspection (AOI) of solder fillets during reflow. This ensures zero-defect solder joint reliability - a mandatory requirement for automotive Grade 0 applications.
Does AMT49107KEVSR-3-T require external bootstrap capacitors for each phase?
Yes, AMT49107KEVSR-3-T requires three external bootstrap capacitors - one per phase - connected to CA (Phase A), CB (Phase B), and CC (Phase C) pins. These capacitors supply the floating gate drive voltage for high-side N-MOSFETs and must be selected per Allegro's Application Note AN29902 to ensure stable operation across temperature and load conditions.
AMT49107KEVSR-3-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Allegro MicroSystems
- Series:
- -
- Package/Case:
- 48-VFQFN Exposed Pad
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- -
- Driven Configuration:
- Half-Bridge
- Channel Type:
- 3-Phase
- Number of Drivers:
- 6
- Gate Type:
- N-Channel MOSFET
- Voltage - Supply:
- 4.5V ~ 50V
- Logic Voltage - VIL, VIH:
- 0.99V, 2.1V
- Current - Peak Output (Source, Sink):
- 1.1A, 2.2A
- Input Type:
- Non-Inverting
- High Side Voltage - Max (Bootstrap):
- -
- Rise / Fall Time (Typ):
- -
- Operating Temperature:
- -40°C ~ 150°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 48-QFN (7x7)
AMT49107KEVSR-3-T FAQ
1.How can I place an order for AMT49107KEVSR-3-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AMT49107KEVSR-3-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 AMT49107KEVSR-3-T reliable?
The price and inventory of AMT49107KEVSR-3-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AMT49107KEVSR-3-T is usually 5 days.
3.What payment methods are accepted for AMT49107KEVSR-3-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AMT49107KEVSR-3-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AMT49107KEVSR-3-T?
AMT49107KEVSR-3-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AMT49107KEVSR-3-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 AMT49107KEVSR-3-T?
For technical support, including AMT49107KEVSR-3-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AMT49107KEVSR-3-T requirements.
6.How does Aetrix verify that AMT49107KEVSR-3-T is sourced from the original manufacturer or authorized distributors?
All AMT49107KEVSR-3-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 AMT49107KEVSR-3-T meets industry standards.
7.What is the process for return or replacement of AMT49107KEVSR-3-T?
All AMT49107KEVSR-3-T units undergo pre-shipment inspection (PSI). If there is an issue with AMT49107KEVSR-3-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 AMT49107KEVSR-3-T part is unused and in its original packaging.
Return procedure for AMT49107KEVSR-3-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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