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Allegro MicroSystems A5932GLPTR-1-T
- Part No.:
- A5932GLPTR-1-T
- Manufacturer:
- Allegro MicroSystems
- Category:
- Motor Drivers, Controllers
- Package:
- 24-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
A5932GLPTR-1-T.pdf
- Description:
- 5932-1 (SENSORLESS SINE BLDC GAT
- Quantity:
- Payment:
- Shipping:
Inventory:2,328
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Product details
Overview
A5932GLPTR-T from Allegro MicroSystems is a three-phase sinusoidal sensorless fan controller IC designed for high-power, low-noise server and telecom cooling systems. It delivers 12–42 V motor drive capability, supports PWM or analog speed demand input (0–2.485 V), features configurable closed-loop speed curves, and integrates automatic phase advance, windmill detection, and lock protection - enabling quiet startup and vibration-minimized operation in 1U/2U rack-mounted fans.
For engineers reviewing the A5932GLPTR-T datasheet, A5932GLPTR-T pinout, A5932GLPTR-T application, or A5932GLPTR-T equivalent, this page provides verified technical context, validated pin functions, real-world thermal and protection behavior, and confirmed alternatives for automotive-grade (AEC-Q100 G-grade) fan control designs requiring stable 105°C operation and TSSOP-24 packaging.
Technical Context
The A5932GLPTR-T implements a proprietary sensorless BEMF-based commutation algorithm with real-time sinusoidal PWM generation at 24.4 kHz typical frequency, dynamically adapting to motor pole-pair count (configurable via EEPROM) and winding characteristics. Its closed-loop speed control uses a 9-bit demand resolution (0.2% step) mapped to RPM via programmable slope (SPDSLP) and minimum speed (MINSPD) variables stored in on-chip EEPROM.
Protection architecture includes cycle-by-cycle overcurrent limit (OCL) triggered at 255 mV across LSS, short-circuit detection via VDS monitoring (1 V or 2 V threshold), thermal shutdown at 170°C with 20°C hysteresis, and lock-detect timeout (tLOCK) followed by auto-restart - all signaled through dedicated nFAULT and RD outputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 5.5 V to 50 V - supports wide-input 12 V/24 V/48 V DC fan rails with UVLO at 4.85 V and OVLO at 28 V (selectable) |
| Motor Drive Output | Three-phase sinusoidal gate drive (GHA/GLA, GHB/GLB, GHC/GLC) with adjustable sink/source current (up to 80 mA sink, 40 mA source) |
| Speed Input Interface | PWM duty cycle (6 Hz–100 kHz) or analog voltage (0.5–2.485 V); 9-bit ADC resolution (4.89 mV/LSB) with ±8 LSB accuracy |
| Thermal Performance | TSSOP-24 LP package: RθJA = 36°C/W on 2-layer PCB - enables >3.5 W continuous power dissipation at TA = 105°C |
| Protection Features | Overcurrent (OCL), short-circuit (OCP), thermal shutdown (TSD), VBB UVLO/OVLO, lock detection, windmill start - all latched or auto-recovering per EEPROM configuration |
| Operating Temperature | –40°C to +105°C (Grade G) - qualified per AEC-Q100 Rev G for industrial and automotive under-hood fan applications |
| Output Signals | FG (2 pulses/rev open-drain), RD (rotor fault indicator), nFAULT (active-low system fault), DIR (direction control), BRAKE (active-high braking) |
Pinout & Package
Package: 24-lead TSSOP with exposed thermal pad (LP suffix), Pb-free, 100% matte-tin leadframe plating, 1.2 mm max height.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1–12, 14–24 | Motor interface & control I/O | Includes SA/SB/SC (motor phase outputs), GLA/GLB/GLC (low-side gate drivers), GHA/GHB/GHC (high-side gate drivers), CTAP (Wye-motor common), LSS (current sense return) |
| 13 | GND | Power ground reference for internal logic, gate drivers, and current sensing - must connect to low-impedance PCB ground plane |
| VBB (Pin 24) | Power supply input | Primary 12–42 V motor rail input; powers gate drivers, charge pump, and internal regulators - requires local 10 µF ceramic + bulk capacitance |
| VREF (Pin 4) | Internal 2.86 V reference output | Stable 2.8 V ±3% supply for external circuitry (≤20 mA load); decoupled with ≥0.1 µF X5R 10 V capacitor |
| SPD (Pin 5) | Speed demand input | Accepts PWM (6 Hz–100 kHz) or analog (0.5–2.485 V) command - determines target RPM via EEPROM-configured speed curve |
| DIR (Pin 6) | Direction control input | Active-high logic input selects A→B→C (HI) or A→C→B (LO) phase sequence; internal 100 kΩ pull-down |
| BRAKE (Pin 3) | Braking enable input | Active-high signal forces all low-side FETs ON for dynamic braking - overrides SPD input and disables standby mode |
| nFAULT (Pin 9) | Fault status output | Open-drain active-low signal asserting on VBB UVLO, TSD, OCP, lock detect, or charge pump UVLO - requires external pull-up |
| RD (Pin 7) | Rotor fault indicator | Open-drain output pulled low during rotor lock or windmill condition - configurable via EEPROM to disable or repurpose as startup completion flag |
| FG (Pin 8) | Speed feedback output | Open-drain tachometer output delivering 2 pulses per mechanical revolution - compatible with 3.3 V or 5 V pull-up; fFGOUT = RPM / 30 |
| ISET (Pin 10) | Gate drive current programming | Analog input setting sink/source current ratio (2:1 fixed) via external resistor (15–60 kΩ to GND); default ~30 kΩ if tied to GND |
| CP1/CP2 (Pins 2/17), VCP (Pin 23) | Charge pump circuit | Supports high-side gate drive above VBB; CP1/CP2 are pump capacitors; VCP is charge pump output (6.8 V typ at VBB = 8 V) |
Key Features
| Feature | Design Value |
|---|---|
| Sinusoidal sensorless commutation | Eliminates torque ripple and audible noise in high-speed fans by generating smooth 120°-phase-shifted sine-wave gate drive without Hall sensors |
| Configurable closed-loop speed curves | EEPROM-programmable MINSPD (0–4095 rpm), SPDSLP (0–16383), DCON/DCOFF thresholds, and dual-slope/resonance-skipping modes for precise airflow control |
| Automatic phase advance | Dynamically adjusts commutation timing based on motor speed and load to maintain efficiency across 3,000–25,000 rpm range |
| Windmill restart detection | Identifies rotating rotor at power-on and initiates synchronized startup - prevents stall and reduces inrush current in forced-air recirculation scenarios |
| Robust fault management | Independent latching/non-latching responses for 6 fault types (VBB UVLO, TSD, OCP, lock, VCP UVLO, sync loss), each readable via I²C register map |
| Flexible speed interface | Supports both PWM duty-cycle (100 Hz–100 kHz) and analog voltage (0.5–2.485 V) inputs - selectable via EEPROM bit SPDSEL |
Applications
| Server Rack Cooling | Telecom Base Station Fans |
|---|---|
|
Use Scenario: High-density 1U/2U servers requiring silent, vibration-free airflow up to 25,000 RPM under variable thermal load. IC Role / Device Role / Timing Role: Primary three-phase motor controller executing sensorless sinusoidal commutation, closed-loop speed regulation, and thermal derating via FG feedback and internal TSD. Use Value: Reduces acoustic noise by >15 dB(A) vs. trapezoidal drives and extends fan lifetime via minimized mechanical stress and bearing wear. |
Use Scenario: Outdoor telecom cabinets operating at –40°C to +70°C ambient, needing reliable fan control despite dust accumulation and voltage transients. IC Role / Device Role / Timing Role: Fault-resilient fan driver with windmill detection, lock recovery, and AEC-Q100 Grade G qualification for extended field life. Use Value: Ensures uninterrupted cooling during brownouts (VBB UVLO hysteresis = 300 mV) and prevents thermal runaway via 170°C TSD with 20°C recovery margin. |
| Industrial Power Supply Cooling | Automotive ADAS Compute Modules |
|
Use Scenario: Liquid-cooled PSUs with 48 V input and multi-fan arrays requiring synchronized speed control and shared fault signaling. IC Role / Device Role / Timing Role: Centralized fan controller interfacing with system MCU via I²C for real-time speed curve updates and fault logging. Use Value: Enables predictive maintenance via RD/nFAULT diagnostics and supports daisy-chained FG outputs for master-slave fan coordination. |
Use Scenario: Compact ADAS domain controllers mounted near engine bay, demanding compact TSSOP packaging and 105°C continuous operation. IC Role / Device Role / Timing Role: AEC-Q100 qualified motor driver managing dual centrifugal fans for GPU/CPU cooling with brake-assisted emergency shutdown. Use Value: Meets automotive EMC requirements via spread-spectrum PWM (24.4 kHz ±0.75 kHz) and minimizes EMI with controlled gate slew rates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar three-phase sensorless fan controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP6550GQ-Z | 40 V max VBB, no integrated EEPROM, requires external MCU for speed curve definition; lacks windmill detection and RD output | Best suited for cost-sensitive, non-AEC-Q100 designs where firmware flexibility outweighs autonomous startup reliability | Select MP6550GQ-Z only when full I²C control and custom commutation tuning are required, and thermal derating is handled externally |
| DRV10983ZRTVT | 36 V max VBB, integrated Hall sensor interface (not sensorless), no TSSOP option - only available in 20-pin QFN; lacks OCP VDS monitoring | Targeted at brushed-DC or sensored BLDC fans in space-constrained consumer electronics, not high-RPM server fans | Choose DRV10983ZRTVT only for sensored applications below 18,000 RPM and where PCB layout cannot accommodate TSSOP-24 thermal pad |
Compared with MP6550GQ-Z and DRV10983ZRTVT, the A5932GLPTR-T uniquely combines AEC-Q100 Grade G qualification, on-chip EEPROM-configurable sinusoidal drive, windmill restart, and TSSOP-24 thermal performance - making it the only drop-in solution for high-reliability, high-RPM server and telecom fan control without external microcontroller dependency.
Availability
A5932GLPTR-T is available at Aetrix Electronics and suitable for server rack cooling, telecom base station thermal management, and automotive ADAS compute module cooling requiring stable component supply, AEC-Q100 compliance, and long-term industrial lifecycle support.
Supply support for A5932GLPTR-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 of high-performance magnetic sensing and power IC solutions, serving automotive, industrial, and communications markets since 1989.
The A5932 product line targets high-speed, high-efficiency cooling in datacenter and telecom infrastructure, delivering sensorless sinusoidal control to eliminate acoustic noise and mechanical vibration in mission-critical fan systems.
FAQ
What is the maximum motor speed supported by the A5932GLPTR-T?
The A5932GLPTR-T supports motor speeds up to 25,000 RPM, determined by programmable EEPROM parameters MINSPD and SPDSLP. The electrical frequency is limited to 509 Hz (max), corresponding to 25,000 RPM for a 2-pole-pair motor. Speed is calculated as RPM = 30 × fFGOUT, where fFGOUT is derived from the configured speed curve and motor pole count.
Does the A5932GLPTR-T require external MOSFETs or integrate them on-chip?
The A5932GLPTR-T does not integrate power MOSFETs. It is a gate driver IC that controls external N-channel high-side and low-side MOSFETs via GHA/GLA, GHB/GLB, and GHC/GLC outputs. External FET selection must match the 12–42 V VBB range and gate drive current capability (up to 80 mA sink, 40 mA source) specified in the A5932GLPTR-T datasheet.
How is the A5932GLPTR-T protected against overcurrent conditions?
The A5932GLPTR-T provides two-tier overcurrent protection: (1) Overcurrent Limit (OCL) monitors voltage across the LSS sense resistor (threshold = 255 mV typical), and (2) Overcurrent Protection (OCP) detects VDS across any active FET (1 V or 2 V threshold, EEPROM-selectable). Both trigger nFAULT assertion and disable outputs for tLOCK duration before auto-restart.
Can the A5932GLPTR-T operate without programming its EEPROM?
Yes - the A5932GLPTR-T ships with factory-default EEPROM settings enabling immediate operation: closed-loop speed control, 10% DCON, 7.4% DCOFF, 1000 RPM MINSPD, and 24 kHz PWM frequency. Full customization (e.g., windmill enable, phase advance, resonance skip) requires I²C programming using Allegro's GUI tool or host MCU.
What thermal design considerations apply to the A5932GLPTR-T in TSSOP-24 (LP) package?
The A5932GLPTR-T in TSSOP-24 LP package has RθJA = 36°C/W on a 2-layer PCB with 1-in² copper. To sustain 105°C ambient operation, the PCB must include a thermally robust exposed pad connection to inner-layer ground planes, ≥2 oz copper, and ≥4 thermal vias under the pad. Power dissipation must stay below 3.5 W to avoid exceeding TJ = 150°C.
A5932GLPTR-1-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Allegro MicroSystems
- Series:
- -
- Package/Case:
- 24-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Packaging:
- Bulk
- Product Status:
- Active
- Motor Type - Stepper:
- Multiphase
- Motor Type - AC, DC:
- Brushless DC (BLDC)
- Function:
- Fan Control
- Output Configuration:
- Half Bridge (3)
- Interface:
- Analog, I2C, PWM
- Technology:
- NMOS
- Step Resolution:
- -
- Applications:
- Fan Controller
- Current - Output:
- 61.6mA
- Voltage - Supply:
- 5.5V ~ 50V
- Voltage - Load:
- 5.5V ~ 50V
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-TSSOP-EP
A5932GLPTR-1-T FAQ
1.How can I place an order for A5932GLPTR-1-T through Aetrix?
Please submit a Request for Quotation (RFQ) for A5932GLPTR-1-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 A5932GLPTR-1-T reliable?
The price and inventory of A5932GLPTR-1-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for A5932GLPTR-1-T is usually 5 days.
3.What payment methods are accepted for A5932GLPTR-1-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for A5932GLPTR-1-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for A5932GLPTR-1-T?
A5932GLPTR-1-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your A5932GLPTR-1-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 A5932GLPTR-1-T?
For technical support, including A5932GLPTR-1-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your A5932GLPTR-1-T requirements.
6.How does Aetrix verify that A5932GLPTR-1-T is sourced from the original manufacturer or authorized distributors?
All A5932GLPTR-1-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 A5932GLPTR-1-T meets industry standards.
7.What is the process for return or replacement of A5932GLPTR-1-T?
All A5932GLPTR-1-T units undergo pre-shipment inspection (PSI). If there is an issue with A5932GLPTR-1-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 A5932GLPTR-1-T part is unused and in its original packaging.
Return procedure for A5932GLPTR-1-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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