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Allegro MicroSystems A5988GJPTR-1-T
- Part No.:
- A5988GJPTR-1-T
- Manufacturer:
- Allegro MicroSystems
- Category:
- Motor Drivers, Controllers
- Package:
- 48-LQFP Exposed Pad
- Datasheet:
-
A5988GJPTR-1-T.pdf
- Description:
- IC MTR DRVR BIPOLAR 8-40V 48LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,920
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Product details
Overview
A5988GJPTR-1-T from Allegro MicroSystems is a quad DMOS full-bridge PWM motor driver IC designed to control two bipolar stepper motors or four DC motors in industrial motion systems. It delivers up to 1.6 A per bridge at 40 V, features 8.1 µs fixed off-time PWM current regulation, 2-bit nonlinear DAC step control (full/half/quarter), and mixed-decay mode for reduced audible noise and improved step accuracy.
For engineers reviewing the A5988GJPTR-1-T datasheet, A5988GJPTR-1-T pinout, A5988GJPTR-1-T application, or A5988GJPTR-1-T equivalent, key selection considerations include its 48-pin LQFP package with exposed thermal pad, synchronous rectification for lower power dissipation, integrated overcurrent/thermal/UVLO protection, and independent VREFx inputs enabling dynamic current scaling per bridge.
Technical Context
The A5988GJPTR-1-T implements four independent N-channel DMOS full-bridges with fixed off-time (8.1 µs) PWM current regulation per channel, using external sense resistors (RSx) and per-bridge VREFx inputs to set trip thresholds via ITRIP = VREF / (3 × RS). Its mixed-decay operation combines 30.1% fast decay and 69.9% slow decay within each off-time period to minimize torque ripple and heat generation.
Control logic uses industry-standard PHASE/I0/I1 interface for step sequencing, while internal charge pump (CP1/CP2/VCP) generates gate drive voltage above VBB for high-side N-MOSFETs. Synchronous rectification activates during current decay to replace body-diode conduction with low-RDS(on) MOSFET paths, reducing power loss by >30% versus asynchronous decay under typical loads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output rating | 40 V maximum load supply; supports 24 V and 36 V industrial bus rails without derating |
| Continuous output current | 1.6 A per full-bridge; sustained across all four bridges with proper PCB thermal design (RθJA = 23 °C/W) |
| Fixed off-time | 8.1 µs; enables higher PWM frequency and finer current resolution vs. 30 µs variant (A5988GJPTR-T) |
| Step resolution | Full/half/quarter stepping via 2-bit DAC; supports microstepping through dynamic VREFx modulation |
| Logic compatibility | 3.3 V and 5 V tolerant inputs; eliminates level-shifting requirements in mixed-voltage systems |
| Thermal protection | Thermal shutdown at 165 °C (typ.) with 15 °C hysteresis; prevents latch-up during transient overload |
| Supply current (sleep) | <1 µA; enables battery-powered applications with extended standby duration |
Pinout & Package
The A5988GJPTR-1-T is supplied in a 48-pin LQFP package (7 mm × 7 mm) with exposed thermal pad for enhanced heat dissipation. Package meets RoHS and JEDEC MS-026 BBCHD standards, with 100% matte-tin leadframe plating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT1A–OUT4B | DMOS full-bridge outputs | Four independent H-bridge terminals; each pair drives one motor winding or DC motor direction |
| SENSE1–SENSE4 | Current sense inputs | Low-impedance analog inputs monitoring voltage drop across external RSx resistors for closed-loop current regulation |
| VREF1–VREF4 | Reference voltage inputs | Analog inputs setting per-bridge peak current threshold; 0–1.5 V range enables precise ITRIP scaling |
| PHASE1–PHASE4 | Stepper phase control | Digital inputs selecting winding polarity per bridge; used with I0x/I1x to define step sequence and direction |
| I01–I04, I11–I14 | Step logic inputs | Binary-encoded control lines determining full/half/quarter step mode and commutation state per bridge |
| SLEEPn | Active-low enable | Puts device into ultra-low-power state (<1 µA); disables charge pump and all drivers without requiring power cycle |
| FAULTn | Open-drain fault indicator | Pulled low during overcurrent, thermal shutdown, or UVLO; requires external pull-up for system-level fault reporting |
| VBB1/VBB2 | Load supply inputs | Independent 40 V-rated power rails for bridge groups; decoupling required per datasheet layout guidelines |
| CP1/CP2/VCP | Charge pump circuit | Generates boosted gate drive voltage; requires 0.1 µF ceramic capacitor between CP1–CP2 and VCP–VBBx |
| GND/PGND | Ground connections | Analog/digital ground (GND) and power ground (PGND) must be joined externally at star point under thermal pad |
Key Features
| Feature | Design Value |
|---|---|
| Mixed-decay PWM mode | Reduces audible motor noise by 15 dB and improves step positioning accuracy ±0.5% vs. fast-decay-only operation |
| Synchronous rectification | Lowers power dissipation up to 35% during current decay by replacing body diodes with low-RDS(on) MOSFET conduction |
| Per-bridge VREFx inputs | Enables independent current tuning for multi-motor systems; supports torque balancing across axes |
| Integrated protection suite | Combines thermal shutdown (165 °C), UVLO (7.6 V), crossover-current delay (425 ns typ.), and overcurrent latching |
| Exposed thermal pad | Reduces RθJA to 23 °C/W on 4-layer PCB; allows 1.6 A continuous operation without heatsink at 25 °C ambient |
Applications
| Industrial CNC Positioning | Medical Infusion Pumps |
|---|---|
Use Scenario: Precision open-loop control of dual-axis CNC table using bipolar stepper motors for milling and engraving tasks. IC Role / Device Role / Timing Role: Quad full-bridge driver executing microstepped motion profiles with synchronized phase timing and current-regulated torque delivery. Use Value: 8.1 µs off-time enables smoother acceleration/deceleration curves and reduces resonance-induced vibration at 200–500 Hz operating frequencies. | Use Scenario: Compact, low-noise motor control in portable infusion pumps requiring silent operation and precise flow rate accuracy. IC Role / Device Role / Timing Role: Dual stepper driver managing syringe advancement with quarter-step resolution and mixed-decay current regulation. Use Value: Synchronous rectification cuts thermal rise by 12 °C at 1.2 A, extending battery life and eliminating audible coil whine during patient administration. |
| Automated Test Equipment | Factory Automation Actuators |
Use Scenario: High-speed actuator control in semiconductor probe stations where rapid directional changes and repeatable positioning are critical. IC Role / Device Role / Timing Role: Four independent DC motor drivers controlling XYZ-stage linear actuators and gripper mechanisms via PWM-enabled coast/forward/reverse modes. Use Value: Independent VREFx inputs allow real-time current scaling during acceleration phases, preventing overshoot while maintaining 10 ms step response time. | Use Scenario: Modular conveyor belt indexing systems using stepper-driven rollers in packaging lines with variable load inertia. IC Role / Device Role / Timing Role: Dual stepper controller implementing adaptive current profiling based on encoder feedback and load torque estimation. Use Value: Thermal shutdown hysteresis (15 °C) prevents nuisance tripping during intermittent 1.6 A bursts, ensuring uninterrupted 24/7 production cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad full-bridge motor driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TB6600HG | Higher 4.5 A rating but 32-pin HTSSOP package; no per-bridge VREF inputs; fixed 1/8–1/32 microstepping only | Better suited for high-torque single-motor applications; lacks independent current control per bridge | Select when maximum current per bridge exceeds 1.6 A and microstepping granularity is prioritized over thermal efficiency |
| DRV8825 | 2.2 A rating in 24-pin HTSSOP; integrated current sense; 1/32 microstepping; no mixed-decay mode | Optimized for compact single-stepper designs; lacks fault reporting (no FAULTn) and thermal pad | Choose for space-constrained PCBs where single-motor control and minimal external components outweigh thermal performance needs |
Compared with TB6600HG and DRV8825, the A5988GJPTR-1-T provides superior thermal management via exposed pad and mixed-decay operation, enabling sustained 1.6 A operation across all four bridges without forced air cooling-critical for dense industrial modules.
Availability
A5988GJPTR-1-T is available at Aetrix Electronics and suitable for industrial CNC positioning, medical infusion pumps, automated test equipment, and factory automation actuators requiring stable component supply and long-term production continuity.
Supply support for A5988GJPTR-1-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, founded in 1989 and headquartered in Manchester, NH.
The A5988 product line targets precision motion control applications demanding low-noise, thermally robust, and highly configurable motor drivers for stepper and DC motor systems in industrial and medical environments.
FAQ
What is the fixed off-time value for the A5988GJPTR-1-T?
The A5988GJPTR-1-T has a fixed off-time of 8.1 µs, which is confirmed in the Selection Guide table and Functional Description section of the datasheet. This shorter off-time compared to the 30 µs variant (A5988GJPTR-T) enables higher PWM frequencies and finer current resolution in stepper motor applications. The 8.1 µs value directly determines the minimum achievable current ripple and influences thermal performance during high-duty-cycle operation. A5988GJPTR-1-T uses this timing to optimize step smoothness in quarter-step mode while maintaining stable regulation at 1.6 A.
Does the A5988GJPTR-1-T support microstepping beyond quarter-step?
The A5988GJPTR-1-T natively supports full, half, and quarter stepping via its 2-bit DAC and PHASE/I0/I1 interface. While not a dedicated microstepping IC, it enables finer resolution through dynamic adjustment of the VREFx input voltage-allowing proportional current scaling per step. This method achieves effective microstepping (e.g., 1/8 or 1/16) in firmware-controlled systems, though step accuracy depends on external DAC stability and sense resistor tolerance. A5988GJPTR-1-T does not include internal sine-wave lookup tables or dedicated microstep sequencer logic.
Why does the A5988GJPTR-1-T include both GND and PGND pins?
The A5988GJPTR-1-T separates analog/digital ground (GND) from power ground (PGND) to prevent high-current switching noise from corrupting sensitive current-sense and reference circuits. Per the datasheet layout guidance, GND, PGND, and the exposed thermal pad must be connected at a single low-impedance star point beneath the IC. This arrangement minimizes ground bounce during 1.6 A bridge switching events and ensures accurate VREFx-to-SENSEx comparisons. A5988GJPTR-1-T relies on this separation to maintain ±5% current regulation accuracy across temperature.
Is the FAULTn pin available on the A5988GJPTR-1-T?
Yes, the FAULTn pin is available on the A5988GJPTR-1-T because it uses the JP (48-pin LQFP) package, which includes this open-drain fault output. FAULTn asserts low during overcurrent, thermal shutdown, or VCP undervoltage conditions and remains latched until VBB is cycled or SLEEPn is asserted. This pin is absent in the EV (36-pin QFN) package variants. For A5988GJPTR-1-T, FAULTn provides essential system-level diagnostics without requiring additional monitoring circuitry.
How does synchronous rectification improve efficiency in the A5988GJPTR-1-T?
Synchronous rectification in the A5988GJPTR-1-T replaces body-diode conduction with actively controlled low-RDS(on) MOSFET paths during current decay, reducing forward voltage drop from ~1.2 V to ~0.25 V. This cuts conduction losses by up to 75% in the decay phase, lowering total power dissipation by 25–35% under typical 1.2 A, 50% duty-cycle conditions. The feature automatically disables near zero-crossing to prevent reverse current, preserving motor control fidelity. A5988GJPTR-1-T implements this without external components, delivering measurable thermal and battery-life benefits.
A5988GJPTR-1-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Allegro MicroSystems
- Series:
- -
- Package/Case:
- 48-LQFP Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Motor Type - Stepper:
- Bipolar
- Motor Type - AC, DC:
- Brushed DC
- Function:
- Driver - Fully Integrated, Control and Power Stage
- Output Configuration:
- Half Bridge (8)
- Interface:
- PWM
- Technology:
- DMOS
- Step Resolution:
- 1, 1/2, 1/4
- Applications:
- General Purpose
- Current - Output:
- 1.6A
- Voltage - Supply:
- 8V ~ 40V
- Voltage - Load:
- 8V ~ 40V
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-LQFP
A5988GJPTR-1-T FAQ
1.How can I place an order for A5988GJPTR-1-T through Aetrix?
Please submit a Request for Quotation (RFQ) for A5988GJPTR-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 A5988GJPTR-1-T reliable?
The price and inventory of A5988GJPTR-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 A5988GJPTR-1-T is usually 5 days.
3.What payment methods are accepted for A5988GJPTR-1-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for A5988GJPTR-1-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for A5988GJPTR-1-T?
A5988GJPTR-1-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your A5988GJPTR-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 A5988GJPTR-1-T?
For technical support, including A5988GJPTR-1-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your A5988GJPTR-1-T requirements.
6.How does Aetrix verify that A5988GJPTR-1-T is sourced from the original manufacturer or authorized distributors?
All A5988GJPTR-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 A5988GJPTR-1-T meets industry standards.
7.What is the process for return or replacement of A5988GJPTR-1-T?
All A5988GJPTR-1-T units undergo pre-shipment inspection (PSI). If there is an issue with A5988GJPTR-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 A5988GJPTR-1-T part is unused and in its original packaging.
Return procedure for A5988GJPTR-1-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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