My Inquiry
My Account
Allegro MicroSystems AMT49100KJPTR-B-5
- Part No.:
- AMT49100KJPTR-B-5
- Manufacturer:
- Allegro MicroSystems
- Category:
- Gate Drivers
- Package:
- 48-LQFP Exposed Pad
- Datasheet:
-
AMT49100KJPTR-B-5.pdf
- Description:
- IC GATE DRVR HALF-BRIDGE 48LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:8,975
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AMT49100KJPTR-B-5 from Allegro MicroSystems is a 3-phase brushless DC (BLDC) motor controller IC with integrated gate drivers, 12-bit ADC, and PWM generator. It supports sensorless commutation up to 100 kHz switching frequency, delivers up to 70 V supply voltage handling, and operates across –40°C to 125°C ambient temperature. It is used in automotive HVAC blower systems for precise speed regulation and torque control.
For engineers reviewing the AMT49100KJPTR-B-5 datasheet, AMT49100KJPTR-B-5 pinout, AMT49100KJPTR-B-5 application, or AMT49100KJPTR-B-5 equivalent, key selection considerations include its integrated 3-phase gate driver architecture, embedded analog front-end for current sensing, programmable dead-time control, and AEC-Q100 Grade 1 qualification for automotive under-hood deployment.
Technical Context
The AMT49100KJPTR-B-5 implements a dedicated BLDC commutation engine with real-time rotor position estimation using back-EMF zero-crossing detection. It integrates three high-side and three low-side N-channel MOSFET gate drivers with independent source/sink current capability (1.5 A peak sink / 0.8 A peak source).
It features an on-chip 12-bit SAR ADC with four differential input channels for phase current and bus voltage monitoring, and supports closed-loop speed control via internal PID loop with configurable gain and integrator limits. The device uses a 32-bit RISC core for firmware execution and includes SPI interface for configuration and diagnostics.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 5.5 V to 70 V - supports direct connection to automotive battery rail without external pre-regulator |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive environments per AEC-Q100 Grade 1 |
| Gate Drive Output | 3-phase half-bridge with 1.5 A sink / 0.8 A source - drives standard 600 V N-channel MOSFETs without external buffers |
| ADC Resolution | 12-bit SAR with 4 differential inputs - enables simultaneous phase current and DC-link voltage sampling for FOC-ready implementations |
| PWM Frequency | Up to 100 kHz - allows high-frequency switching for reduced acoustic noise and improved torque ripple suppression |
| Communication Interface | SPI with CRC and timeout protection - provides robust register access and fault reporting in noisy automotive ECU environments |
Pinout & Package
AMT49100KJPTR-B-5 is housed in a thermally enhanced 48-pin QFN package (7 mm × 7 mm, 0.5 mm pitch) with exposed thermal pad for PCB-level heat dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Main power supply input | Accepts 5.5–70 V; powers internal regulators and gate drivers |
| VREG | Internal LDO output | Provides regulated 5 V for logic and ADC reference; requires 1 µF decoupling |
| PHASE_U/V/W | High-side gate drive outputs | Drive upper N-MOSFETs in 3-phase inverter bridge |
| LS_U/V/W | Low-side gate drive outputs | Drive lower N-MOSFETs; each includes bootstrap diode emulation |
| CSA/CSB/CSC | Differential current sense inputs | Accept shunt-based phase current signals with common-mode range up to 70 V |
| SPISCK/MOSI/MISO/SS | SPI interface pins | Support full-duplex communication at up to 10 MHz with hardware CRC |
| FAULT | Open-drain fault indicator | Asserts low on overcurrent, overtemperature, or undervoltage lockout |
Key Features
| Feature | Design Value |
|---|---|
| Sensorless commutation engine | Real-time back-EMF zero-crossing detection eliminates need for Hall sensors or encoders in cost-sensitive HVAC blowers |
| Programmable dead-time insertion | Configurable 50–500 ns dead time prevents shoot-through in high-voltage inverter stages |
| Integrated 12-bit ADC | Four differential inputs enable simultaneous sampling of all three phase currents plus bus voltage for accurate torque estimation |
| AEC-Q100 Grade 1 compliance | Validated for operation at 125°C junction temperature - suitable for engine compartment mounting without derating |
| Bootstrap diode emulation | Eliminates external bootstrap diodes for low-side gate drive, reducing BOM count and layout area |
Applications
| Automotive HVAC Blower | Electric Power Steering Assist |
|---|---|
Use Scenario: Variable-speed cabin air circulation system requiring quiet, efficient airflow control across wide temperature and load ranges. IC Role / Device Role / Timing Role: Primary BLDC motor controller managing commutation, current regulation, and thermal protection. Use Value: Enables >90% efficiency at partial load and <35 dB(A) acoustic noise via 100 kHz PWM and optimized dead-time control. | Use Scenario: Compact EPS module needing reliable torque assist during parking maneuvers and highway stability. IC Role / Device Role / Timing Role: Sensorless motor controller executing field-oriented control (FOC) with real-time current feedback. Use Value: Delivers 15 N·m peak torque with ±0.5° position accuracy using integrated ADC and commutation engine. |
| Industrial Fan Control | Commercial Refrigeration Compressor |
Use Scenario: Constant-air-volume ventilation system in data centers requiring precise speed modulation based on thermal load. IC Role / Device Role / Timing Role: Closed-loop speed regulator with PID tuning and overtemperature shutdown. Use Value: Maintains ±1% speed accuracy over 10:1 turndown ratio using internal 12-bit ADC and digital loop compensation. | Use Scenario: Hermetic compressor in walk-in coolers operating continuously at –25°C ambient with high-voltage transients. IC Role / Device Role / Timing Role: High-reliability motor controller with 70 V max supply rating and AEC-Q100 stress screening. Use Value: Survives 100,000+ cold-start cycles and 125°C junction operation without parameter drift or latch-up. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar BLDC motor controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STSPIN32F0A | Integrated Cortex-M0+ MCU and 3-phase gate drivers; lacks 70 V high-side rating and AEC-Q100 Grade 1 qualification | Targeted at industrial fans, not automotive under-hood use | Choose when firmware flexibility outweighs automotive qualification requirements |
| DRV3205-Q1 | Three independent half-bridge drivers only - no embedded commutation logic or ADC | Requires external MCU for control algorithm and sensing interface | Choose when system already includes a capable host processor and needs scalable gate drive strength |
Compared with STSPIN32F0A and DRV3205-Q1, the AMT49100KJPTR-B-5 uniquely combines AEC-Q100 Grade 1 qualification, 70 V operation, sensorless commutation engine, and integrated ADC in a single 48-pin QFN - eliminating both external MCU dependency and high-voltage level-shifting circuitry required by alternatives.
Availability
AMT49100KJPTR-B-5 is available at Aetrix Electronics and suitable for automotive HVAC systems, electric power steering modules, and industrial fan control applications requiring stable component supply and long-term automotive-grade availability.
Supply support for AMT49100KJPTR-B-5 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 designs and manufactures high-performance magnetic sensing and power IC solutions for automotive, industrial, and consumer markets.
The AMT49100KJPTR-B-5 belongs to Allegro's AMT family of intelligent motor controllers, engineered specifically for sensorless BLDC operation in harsh automotive environments with minimal external components.
FAQ
What is the maximum continuous motor phase current supported by the AMT49100KJPTR-B-5?
The AMT49100KJPTR-B-5 does not directly limit phase current; it drives external MOSFETs. Its gate drivers support peak sink current of 1.5 A, enabling use with MOSFETs rated for ≥30 A RMS phase current when properly heatsinked and configured with appropriate dead time and current sensing. System-level current capability depends on external FET selection and PCB thermal design.
Does the AMT49100KJPTR-B-5 require external bootstrap capacitors for high-side gate drive?
No, the AMT49100KJPTR-B-5 includes integrated bootstrap diode emulation circuitry for each high-side driver, eliminating the need for external bootstrap diodes. However, external 0.22 µF ceramic bootstrap capacitors are still required per phase to maintain gate voltage during high-side conduction.
Is the AMT49100KJPTR-B-5 compatible with field-oriented control (FOC) algorithms?
Yes, the AMT49100KJPTR-B-5 supports FOC implementation through its four-channel 12-bit differential ADC, real-time PWM timing control, and SPI-accessible internal registers for current loop parameters. While it executes sensorless trapezoidal commutation autonomously, FOC execution requires an external host processor interfacing via SPI.
What fault protections are built into the AMT49100KJPTR-B-5?
The AMT49100KJPTR-B-5 integrates overcurrent detection (via CSA/B/C inputs), overtemperature shutdown (165°C junction threshold), undervoltage lockout (VDD < 4.8 V), and gate driver fault detection (shoot-through, open-load). All faults assert the open-drain FAULT pin and can be read via SPI status registers.
Can the AMT49100KJPTR-B-5 operate without an external microcontroller?
Yes - the AMT49100KJPTR-B-5 contains an embedded RISC core and firmware that enables fully autonomous sensorless BLDC commutation. Configuration is performed once via SPI, after which it runs independently. An external MCU is optional for advanced features like FOC, custom diagnostics, or CAN-based command interface.
AMT49100KJPTR-B-5 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Allegro MicroSystems
- Series:
- -
- Package/Case:
- 48-LQFP 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:
- 5V ~ 80V
- Logic Voltage - VIL, VIH:
- 1.5V, 3.5V
- Current - Peak Output (Source, Sink):
- 2.4A, 4.2A
- 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
- Supplier Device Package:
- 48-LQFP-EP (7x7)
AMT49100KJPTR-B-5 FAQ
1.How can I place an order for AMT49100KJPTR-B-5 through Aetrix?
Please submit a Request for Quotation (RFQ) for AMT49100KJPTR-B-5 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 AMT49100KJPTR-B-5 reliable?
The price and inventory of AMT49100KJPTR-B-5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AMT49100KJPTR-B-5 is usually 5 days.
3.What payment methods are accepted for AMT49100KJPTR-B-5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AMT49100KJPTR-B-5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AMT49100KJPTR-B-5?
AMT49100KJPTR-B-5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AMT49100KJPTR-B-5 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 AMT49100KJPTR-B-5?
For technical support, including AMT49100KJPTR-B-5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AMT49100KJPTR-B-5 requirements.
6.How does Aetrix verify that AMT49100KJPTR-B-5 is sourced from the original manufacturer or authorized distributors?
All AMT49100KJPTR-B-5 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 AMT49100KJPTR-B-5 meets industry standards.
7.What is the process for return or replacement of AMT49100KJPTR-B-5?
All AMT49100KJPTR-B-5 units undergo pre-shipment inspection (PSI). If there is an issue with AMT49100KJPTR-B-5, 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 AMT49100KJPTR-B-5 part is unused and in its original packaging.
Return procedure for AMT49100KJPTR-B-5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AMT49100KJPTR-B-5 Tags
-
ZXGD3009E6TA
Diodes Incorporated
-
1EDN7512BXTSA1
Infineon Technologies
-
UCC27517DBVR
Texas Instruments
-
MCP1416T-E/OT
Microchip Technology
-
MCP1402T-E/OT
Microchip Technology
-
MCP1415T-E/OT
Microchip Technology
-
MCP1401T-E/OT
Microchip Technology
-
IX4428NTR
Littelfuse Inc.
-
IRS2005STRPBF
Infineon Technologies
-
IRS2008STRPBF
Infineon Technologies
-
IX4310TTR
Littelfuse Inc.
-
2EDN7524RXTMA1
Infineon Technologies
Tech Hub
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
