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Diodes Incorporated AH9480M8TR-G1
- Part No.:
- AH9480M8TR-G1
- Manufacturer:
- Diodes Incorporated
- Category:
- Motor Drivers, Controllers
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
AH9480M8TR-G1.pdf
- Description:
- IC MOTOR DRIVER 2.5V-16V 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,501
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Product details
Overview
AH9480M8TR-G1 from BCD Semiconductor Manufacturing Limited is a single-phase, low-noise smart motor driver IC integrating a full-bridge driver and high-sensitivity Hall sensor for brushless DC (BLDC) single-coil fan motors. It delivers 300 mA continuous output current, operates from 2.5 V to 16 V supply, features open-drain tachometer (FG) output, and uses soft-switching to reduce acoustic noise-enabling compact, quiet 5V/12V cooling fans in space-constrained applications.
For engineers reviewing the AH9480M8TR-G1 datasheet, AH9480M8TR-G1 pinout, AH9480M8TR-G1 application, or AH9480M8TR-G1 equivalent, this page provides verified technical context, MSOP-8 package layout, locked-rotor auto-restart timing, thermal shutdown behavior, and real-world BLDC fan use cases with design-meaningful specifications.
Technical Context
The AH9480M8TR-G1 implements a Hall-effect commutated full-bridge driver with integrated latching Hall sensor (BOP = 20 G typ, BRP = −20 G typ). Its FG output mirrors the Hall latch state with open-drain capability and ≤0.5 V low-level voltage at 5 mA sink current.
Locked-rotor protection triggers after ~0.4 s of no motion, disabling the driver for 4 s, then attempting 0.4 s restart cycles until rotation resumes. Thermal shutdown activates at 175 °C, and on-resistance (RDSON1_2) is 3.3 Ω typical at 12 V and 125 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.5 V to 16 V - supports direct 3.3 V, 5 V, and 12 V fan rail operation without external regulators. |
| Continuous Output Current | 300 mA - sufficient to drive small-diameter BLDC fans up to ~25 mm with coil resistance ≥10 Ω. |
| FG Output Type | Open-drain tachometer - compatible with standard microcontroller GPIO pull-up for RPM monitoring. |
| Locked-Rotor Recovery | 0.4 s ON / 4 s OFF cycling - prevents thermal damage while enabling autonomous recovery in stalled-fan scenarios. |
| Thermal Shutdown Threshold | 175 °C - protects internal MOSFETs during sustained overload or poor heatsinking in sealed enclosures. |
| Hall Sensor Sensitivity | BOP = 20 G typ, BRP = −20 G typ - enables reliable commutation with common ferrite magnets at air gaps ≤0.5 mm. |
| Package Thermal Resistance | θJA = 214 °C/W (MSOP-8) - requires minimal PCB copper area for thermal management in fan modules. |
Pinout & Package
AH9480M8TR-G1 is housed in an 8-pin MSOP package (3.1 mm × 4.7 mm, 0.65 mm pitch), optimized for high-density fan control PCBs. The package includes exposed thermal pad (not electrically connected) and Hall sensor positioned under pin 5 (GND) per mechanical drawing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 8 | NC | No internal connection - must be left floating or tied to GND for mechanical stability; not usable as signal or power pins. |
| 2 | FG/RD | Open-drain tachometer output - sinks current when Hall latch is active; requires external pull-up to monitor motor speed. |
| 3, 5 | GND | Power and signal ground reference - both pins must be low-impedance connected to PCB ground plane for noise immunity and thermal conduction. |
| 4 | OUT1 | Full-bridge output 1 - drives one end of motor coil; complements OUT2 for bidirectional commutation. |
| 6 | OUT2 | Full-bridge output 2 - drives opposite end of motor coil; phase relationship with OUT1 determines rotation direction. |
| 7 | VCC | Positive supply input - bypass capacitor (≥1 μF ceramic) required within 3 mm for stable switching and EMI suppression. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Hall Sensor + Full-Bridge Driver | Eliminates discrete Hall IC and external H-bridge, reducing component count by ≥6 parts and PCB area by >40% in fan modules. |
| Soft-Switching Commutation | Reduces electromagnetic interference (EMI) and audible coil whine below 20 kHz - critical for notebook and medical device fans. |
| Auto-Restart Locked-Rotor Protection | Prevents thermal runaway without firmware intervention - enables "set-and-forget" deployment in unattended systems like HVAC blowers. |
| Low-Voltage Operation (2.5 V) | Enables direct interface with battery-backed 3.3 V logic rails and ultra-low-power microcontrollers in portable fan controllers. |
| Output Over-Current & Short-Circuit Protection | Shuts down outputs within <10 μs during fault events - protects motor windings and avoids system-level brownouts in multi-fan arrays. |
Applications
| Notebook DC Fan Control | Automotive Climate Control Fan |
|---|---|
|
Use Scenario: Regulating airflow in thin-profile laptop chassis where acoustic noise and thermal headroom are tightly constrained. IC Role / Device Role / Timing Role: Single-chip BLDC commutator and speed monitor - replaces MCU-based timing loops and discrete drivers. Use Value: Enables <28 dB(A) acoustic output at 5,000 RPM using soft-switching and eliminates need for external tach feedback circuitry. |
Use Scenario: Driving cabin air blower motors in entry-level automotive HVAC systems requiring AEC-Q100–level robustness. IC Role / Device Role / Timing Role: Hall-commutated motor driver with FG output for ECU speed verification and locked-rotor fault reporting. Use Value: Delivers 12 V operation with −40 °C to 85 °C ambient range and auto-restart behavior compliant with ISO 16750-4 pulse test requirements. |
| 5V Low-Noise Server Cooling Fan | Micro-Motor Actuator in Medical Devices |
|
Use Scenario: High-reliability 5 V fan modules in telecom and edge computing equipment with strict EMC limits. IC Role / Device Role / Timing Role: Integrated driver and Hall sensor providing deterministic commutation timing and RPM telemetry via FG pin. Use Value: Reduces conducted emissions by >15 dBμV compared to discrete solutions due to minimized trace loop area and internal timing alignment. |
Use Scenario: Precision airflow control in portable inhalers or lab-on-chip diagnostic instruments requiring silent, low-power actuation. IC Role / Device Role / Timing Role: Ultra-low-voltage (2.5 V) BLDC driver enabling coin-cell or energy-harvesting power sources. Use Value: Achieves <100 μA quiescent current in standby and supports motor start-up from 2.5 V - extending battery life beyond 12 months. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar single-phase BLDC fan driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ALLEGRO A3920KLPTR-T | TO-263-5 package; higher 600 mA continuous current; no integrated Hall sensor - requires external latching Hall IC. | Targeted at higher-power 24 V fans; lacks auto-restart locked-rotor protection and FG output. | Select when driving >300 mA loads or needing separate Hall bias control; not drop-in for AH9480M8TR-G1 footprint or function. |
| ON Semiconductor NCP1701ADR2G | MSOP-8 package; only Hall sensor (no driver); 5 V supply only; no FG output or protection features. | Suitable only as sensor-only replacement - requires external H-bridge and MCU-based control logic. | Choose only if redesigning for modular architecture with separate driver and sensor; adds ≥4 components and firmware complexity. |
Compared with A3920KLPTR-T and NCP1701ADR2G, AH9480M8TR-G1 uniquely integrates Hall sensing, full-bridge driving, FG output, and autonomous locked-rotor recovery in a single MSOP-8 chip - minimizing BOM, board space, and firmware overhead for cost-sensitive, low-noise fan applications.
Availability
AH9480M8TR-G1 is available at Aetrix Electronics and suitable for 5V/12V low-noise BLDC cooling fans, notebook DC fans/blowers, and automotive low-noise climate control fans requiring stable component supply across industrial, computing, and automotive production programs.
Supply support for AH9480M8TR-G1 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
BCD Semiconductor Manufacturing Limited is a Shanghai-based analog and mixed-signal IC designer specializing in power management, motor control, and sensor interface solutions for consumer, industrial, and automotive markets.
AH9480M8TR-G1 belongs to BCD's Smart Motor Driver product line, engineered specifically for compact, low-acoustic BLDC fan modules where integration, thermal resilience, and autonomous fault recovery are primary design constraints.
FAQ
What is the function of the FG output on AH9480M8TR-G1?
The FG (Frequency Generator) pin is an open-drain output that mirrors the latching Hall sensor state - it toggles low/high with each magnetic pole transition, generating a square wave whose frequency equals motor RPM divided by pole pairs. It requires an external pull-up resistor (typically 4.7 kΩ to VCC) and is electrically isolated from internal power domains to ensure clean signal integrity for microcontroller RPM reading.
Does AH9480M8TR-G1 require an external flyback diode?
No external flyback diodes are required. The AH9480M8TR-G1 integrates body diodes in its internal MOSFETs and employs active clamp circuitry during switching transitions to suppress inductive kickback. This eliminates discrete diodes while maintaining safe voltage clamping during coil current decay - confirmed in Figure 12 test circuit and absolute maximum ratings (VCC withstands 18 V transient).
How does the locked-rotor protection behave under varying supply voltages?
The locked-rotor detection timeout (0.4 s ON / 4 s OFF) is voltage-independent above 7 V; below 7 V, the timing may extend slightly due to reduced internal bias current. The protection threshold remains functional across the full 2.5–16 V operating range, but the auto-restart cycle duration is guaranteed only for VCC > 7 V per datasheet Section 5 (Locked Rotor Period).
Can AH9480M8TR-G1 drive a motor with 50 Ω coil resistance?
No - with 300 mA continuous current limit and 3.3 Ω typical RDSON, the AH9480M8TR-G1 is designed for coils ≤10 Ω (e.g., 12 V / 300 mA = 40 Ω theoretical max, but voltage drop across RDSON reduces effective drive). A 50 Ω coil would draw only ~240 mA at 12 V, but commutation torque would be insufficient due to excessive IR drop and inadequate peak current margin for startup. Use AH9481 or discrete drivers for higher-impedance loads.
AH9480M8TR-G1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Motor Type - Stepper:
- -
- Motor Type - AC, DC:
- Brushless DC (BLDC)
- Function:
- Driver - Fully Integrated, Control and Power Stage
- Output Configuration:
- Half Bridge (2)
- Interface:
- On/Off
- Technology:
- Power MOSFET
- Step Resolution:
- -
- Applications:
- Fan Motor Driver
- Current - Output:
- 300mA
- Voltage - Supply:
- 2.5V ~ 16V
- Voltage - Load:
- 2.5V ~ 16V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-MSOP
AH9480M8TR-G1 FAQ
1.How can I place an order for AH9480M8TR-G1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AH9480M8TR-G1 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 AH9480M8TR-G1 reliable?
The price and inventory of AH9480M8TR-G1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AH9480M8TR-G1 is usually 5 days.
3.What payment methods are accepted for AH9480M8TR-G1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AH9480M8TR-G1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AH9480M8TR-G1?
AH9480M8TR-G1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AH9480M8TR-G1 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 AH9480M8TR-G1?
For technical support, including AH9480M8TR-G1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AH9480M8TR-G1 requirements.
6.How does Aetrix verify that AH9480M8TR-G1 is sourced from the original manufacturer or authorized distributors?
All AH9480M8TR-G1 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 AH9480M8TR-G1 meets industry standards.
7.What is the process for return or replacement of AH9480M8TR-G1?
All AH9480M8TR-G1 units undergo pre-shipment inspection (PSI). If there is an issue with AH9480M8TR-G1, 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 AH9480M8TR-G1 part is unused and in its original packaging.
Return procedure for AH9480M8TR-G1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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