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Allegro MicroSystems A4962KLPTR-T
- Part No.:
- A4962KLPTR-T
- Manufacturer:
- Allegro MicroSystems
- Category:
- Motor Drivers, Controllers
- Package:
- 20-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
A4962KLPTR-T.pdf
- Description:
- IC MOTOR CONTROLLER
- Quantity:
- Payment:
- Shipping:
Inventory:4,798
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Product details
Overview
A4962KLPTR-T from Allegro MicroSystems is a three-phase, sensorless brushless DC (BLDC) motor controller IC designed for automotive fuel, oil, and urea pumps. It drives external P-channel high-side and N-channel low-side MOSFETs using block commutation, senses rotor position via back-EMF without Hall sensors, operates from 4.2 V to 50 V, supports up to 30,000 rpm motor speeds, and communicates via SPI-compatible serial interface.
For engineers reviewing the A4962KLPTR-T datasheet, A4962KLPTR-T pinout, A4962KLPTR-T application, or A4962KLPTR-T equivalent, this page delivers verified technical context on sensorless startup, programmable phase advance (14–16°), current limit threshold (200 mV), fault reporting via open-drain FAULTn, and thermal protection up to 175°C junction temperature.
Technical Context
The A4962KLPTR-T implements a proprietary back-EMF zero-crossing detection scheme with digital filtering and hysteresis to enable robust rotor position estimation without external sensors. Its commutation timer and position estimator dynamically adjust phase advance and speed based on real-time bemf feedback, supporting loss-of-synchronization recovery via configurable hold time (15.2–16.8 ms) and start speed (7.6–8.4 Hz).
It integrates six gate drivers-three high-side (GHA/GHB/GHC) with 12–44 Ω pull-up resistance and three low-side (GLA/GLB/GLC) with 13–45 Ω pull-down resistance-each featuring cross-conduction prevention, programmable dead time (0.9–1.1 µs), and VDS fault monitoring with blank time (3.04–3.36 µs) and offset compensation (±100 mV).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 4.2 V to 50 V - enables direct battery connection in 12 V/24 V automotive systems without external regulators |
| Motor Speed Range | <100 rpm to >30,000 rpm - accommodates low-speed precision pumps and high-speed blowers |
| Current Limit Threshold | 200 mV (typical) - sets peak motor current via external sense resistor; ±5% error tolerance ensures repeatable torque control |
| Phase Advance Range | 14° to 16° (electrical degrees) - improves torque efficiency and maximum achievable speed under load |
| Gate Drive Dead Time | 0.9–1.1 µs - prevents shoot-through in external P-N MOSFET bridge during switching transitions |
| Fault Reporting | Single open-drain FAULTn output + SPI diagnostic register - provides immediate system-level fault indication and detailed root-cause analysis |
| Thermal Protection | Overtemperature shutdown at 170–180°C with 15°C hysteresis - safeguards against thermal runaway in enclosed automotive modules |
Pinout & Package
The A4962KLPTR-T is housed in a thermally enhanced 20-pin eTSSOP package (6.5 mm × 4.4 mm, 1.2 mm height) with exposed thermal pad soldered to PCB ground for efficient heat dissipation in automotive under-hood environments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VBB | Main supply input | Accepts 4.2–50 V battery rail; powers internal regulators, charge pump, and gate drivers |
| GHA, GHB, GHC | High-side gate drive outputs | Drive P-channel MOSFET gates; feature active pull-up/pull-down and VDS fault sensing |
| GLA, GLB, GLC | Low-side gate drive outputs | Drive N-channel MOSFET gates; include cross-conduction prevention and blank-time control |
| SA, SB, SC | Motor phase connections | Connect directly to motor windings; serve as both drive nodes and back-EMF sensing points |
| CSP, CSM | Differential current sense inputs | Interface with external shunt resistor to enable closed-loop torque/current control |
| PWM | Proportional control input | Single low-frequency PWM signal defines operating mode (speed/torque) and duty cycle demand |
| FAULTn | Open-drain fault indicator | Active-low output signals undervoltage, overtemperature, or bridge faults; can pull PWM low for fail-safe shutdown |
| SPD | Speed output | Programmable open-drain output delivering either FG (electrical cycle) or TACHO (commutation) frequency signal |
| SCK, SDI, SDO, STRn | SPI-compatible serial interface | 16-bit configuration/control interface supporting dead time, phase advance, gains, and diagnostics |
Key Features
| Feature | Design Value |
|---|---|
| Sensorless startup sequence | Forces known hold position (phase C low, phase A PWM) for consistent initial rotation before bemf capture |
| Programmable closed-loop control | Independent proportional/integral gain tuning (KCP/KCI/KSP/KSI) for speed or current loops via SPI registers |
| VDS fault monitoring | Detects high-side and low-side MOSFET short-circuits with configurable blank time and offset compensation |
| Thermal and supply protection | Undervoltage lockout (4.2 V turn-on), overtemperature shutdown (175°C), and junction warning (135°C) |
| Robust I/O architecture | All logic pins tolerate battery voltage (–0.3 V to 50 V); PWM, FAULTn, SPD support direct short-to-rail without damage |
Applications
| Automotive Fuel Pumps | Automotive Urea (AdBlue®) Pumps |
|---|---|
Use Scenario: Precise metering of gasoline or diesel into high-pressure common-rail injection systems under wide temperature and voltage variation. IC Role / Device Role / Timing Role: Sensorless BLDC controller managing motor commutation, current limiting, and fault response without position sensors. Use Value: Enables compact, reliable pump modules compliant with ISO 26262 ASIL-B requirements via integrated diagnostics and thermal protection. | Use Scenario: Controlled dosing of aqueous urea solution into diesel exhaust streams to reduce NOx emissions in SCR systems. IC Role / Device Role / Timing Role: Motor controller executing closed-loop speed regulation and startup sequencing in low-flow, high-accuracy dosing applications. Use Value: Delivers stable 100–5,000 rpm operation across –40°C to +150°C ambient, meeting Euro 6d emission compliance timing accuracy. |
| Engine Cooling Fans | HVAC Blower Motors |
Use Scenario: Variable-speed radiator cooling fans responding to ECU coolant temperature and vehicle speed commands. IC Role / Device Role / Timing Role: Standalone controller interfacing directly with ECU via PWM and FAULTn, implementing duty-cycle or speed control modes. Use Value: Reduces acoustic noise and power consumption by enabling smooth 300–8,000 rpm ramping with programmable phase advance. | Use Scenario: Cabin air blower motors in automotive HVAC systems requiring quiet, responsive airflow control. IC Role / Device Role / Timing Role: Local motor driver in close-coupled MCU architecture, using SPI for real-time parameter updates and diagnostic readback. Use Value: Supports rapid transient response (<500 µs brake time) and accurate speed regulation (±5% error) across full voltage range (4.2–50 V). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar sensorless BLDC motor controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP6532GQ-Z | Integrated 6-channel gate drivers only; no current sense amplifier, no SPI interface, no built-in diagnostics | Requires external MCU for commutation logic, current sensing, and fault handling; suited for cost-sensitive non-automotive designs | Select MP6532GQ-Z only when full system-level control resides in host MCU and automotive-grade diagnostics are not required. |
| DRV3205A-Q1 | Includes integrated current sense amplifier and SPI, but lacks sensorless bemf startup and relies on external position sensors or hall inputs | Designed for sensored BLDC systems; cannot replace A4962KLPTR-T in sensorless pump or fan applications without hardware redesign | Choose DRV3205A-Q1 only if existing design uses hall-effect sensors and requires higher gate drive current (1.5 A vs. 0.3 A peak). |
Compared with MP6532GQ-Z and DRV3205A-Q1, the A4962KLPTR-T uniquely integrates sensorless startup, closed-loop speed/torque control, comprehensive fault reporting, and automotive-qualified thermal protection in a single 20-pin package-eliminating need for external sensing, MCU coordination, or safety-redundant circuitry in pump and blower modules.
Availability
A4962KLPTR-T is available at Aetrix Electronics and suitable for automotive fuel pumps, urea dosing systems, and engine cooling fans requiring stable component supply, AEC-Q100 qualification, and long-term production continuity.
Supply support for A4962KLPTR-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 semiconductor company specializing in high-performance magnetic sensing and power ICs for automotive and industrial motion control.
The A4962 product line delivers fully integrated, sensorless BLDC motor controllers optimized for automotive fluid pumping and thermal management applications, emphasizing functional safety, wide supply range, and robust fault coverage.
FAQ
What is the minimum supply voltage required for A4962KLPTR-T to operate in active mode?
The A4962KLPTR-T requires a minimum supply voltage of 4.2 V to maintain active operation with all outputs enabled. Below this threshold, undervoltage lockout engages and disables gate drivers. The device remains powered down until VBB rises above 4.6 V (typical turn-on hysteresis), ensuring clean startup in automotive battery environments where voltage sags occur during cranking. This specification is confirmed in the Absolute Maximum Ratings table and Electrical Characteristics section of the A4962KLPTR-T datasheet.
Does A4962KLPTR-T support closed-loop speed control without external microcontroller intervention?
Yes, the A4962KLPTR-T supports autonomous closed-loop speed control using its internal PI controller, programmable speed setpoint (SMX register), and SPD output feedback. When configured in closed-loop speed mode, it continuously compares measured electrical cycle frequency (FG) against target speed and adjusts commutation timing without requiring continuous host MCU commands. The A4962KLPTR-T only needs initial SPI configuration and a static PWM demand signal-making it suitable for standalone ECU interfaces in automotive pump modules.
How does A4962KLPTR-T handle motor stall or loss of synchronization?
The A4962KLPTR-T detects loss of synchronization when measured speed falls below 25% of the programmed start speed (SS[3:0]) or exceeds the overspeed threshold defined by SMX and SH[1:0]. Upon detection, it enters a recovery state-either attempting automatic restart with hold/start sequence or halting output depending on configuration. This behavior is implemented in hardware with no software dependency, ensuring deterministic response during critical fault conditions in automotive applications.
Can A4962KLPTR-T drive both P-channel high-side and N-channel low-side MOSFETs simultaneously?
Yes, the A4962KLPTR-T integrates six independent gate drivers: three high-side outputs (GHA/GHB/GHC) optimized for P-channel MOSFETs with active pull-up capability, and three low-side outputs (GLA/GLB/GLC) optimized for N-channel MOSFETs with active pull-down capability. Cross-conduction prevention logic and programmable dead time (0.9–1.1 µs) ensure safe simultaneous drive of complementary P-N bridges without shoot-through risk-verified in the Gate Output Drive and Functional Block Diagram sections of the A4962KLPTR-T datasheet.
What diagnostic data is accessible through the SPI interface of A4962KLPTR-T?
The A4962KLPTR-T SPI interface provides access to a 16-bit diagnostic register containing real-time status bits for undervoltage, overtemperature, high-side/low-side VDS faults, current limit activation, loss of synchronization, and communication errors. Each bit maps directly to a physical fault condition, enabling precise root-cause analysis without external test equipment. This register is readable at any time and updated synchronously with fault events-confirmed in the Serial Register Reference and Diagnostics sections of the A4962KLPTR-T datasheet.
A4962KLPTR-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Allegro MicroSystems
- Series:
- -
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Motor Type - Stepper:
- -
- Motor Type - AC, DC:
- Brushless DC (BLDC)
- Function:
- Controller - Commutation, Direction Management
- Output Configuration:
- Pre-Driver - Half Bridge (3)
- Interface:
- SPI
- Technology:
- Power MOSFET
- Step Resolution:
- -
- Applications:
- -
- Current - Output:
- -
- Voltage - Supply:
- 4.2V ~ 50V
- Voltage - Load:
- -
- Operating Temperature:
- -40°C ~ 150°C (TA)
- Grade:
- Automotive
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP-EP
A4962KLPTR-T FAQ
1.How can I place an order for A4962KLPTR-T through Aetrix?
Please submit a Request for Quotation (RFQ) for A4962KLPTR-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 A4962KLPTR-T reliable?
The price and inventory of A4962KLPTR-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for A4962KLPTR-T is usually 5 days.
3.What payment methods are accepted for A4962KLPTR-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for A4962KLPTR-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for A4962KLPTR-T?
A4962KLPTR-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your A4962KLPTR-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 A4962KLPTR-T?
For technical support, including A4962KLPTR-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your A4962KLPTR-T requirements.
6.How does Aetrix verify that A4962KLPTR-T is sourced from the original manufacturer or authorized distributors?
All A4962KLPTR-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 A4962KLPTR-T meets industry standards.
7.What is the process for return or replacement of A4962KLPTR-T?
All A4962KLPTR-T units undergo pre-shipment inspection (PSI). If there is an issue with A4962KLPTR-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 A4962KLPTR-T part is unused and in its original packaging.
Return procedure for A4962KLPTR-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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