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Diodes Incorporated AH9282RTR-G1
- Part No.:
- AH9282RTR-G1
- Manufacturer:
- Diodes Incorporated
- Category:
- Motor Drivers, Controllers
- Package:
- SOT-89-5/6
- Datasheet:
-
AH9282RTR-G1.pdf
- Description:
- IC MOTOR DRIVER 2.5V-16V SOT89-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,537
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Product details
Overview
AH9282RTR-G1 from BCD Semiconductor Manufacturing Limited is a two-phase, dual-coil high-voltage smart fan motor driver IC with integrated Hall-effect sensor, 1200mA peak output current, FG/RD (Rotation Detection) open-drain alarm output, and low 2.5V start-up voltage. It drives brushless DC cooling fans in PC, server, and power supply systems using SOT-89-5 packaging and operates across –40°C to +125°C.
For engineers reviewing the AH9282RTR-G1 datasheet, AH9282RTR-G1 pinout, AH9282RTR-G1 application, or AH9282RTR-G1 equivalent, key selection criteria include its rotation-detection alarm function (not tachometer), dual-output drive capability, thermal shutdown with auto-restart, integrated clamping diodes, and compatibility with 5V/12V fan supply rails.
Technical Context
The AH9282RTR-G1 implements a two-phase commutation controller with dynamic offset-corrected Hall sensing for precise rotor position detection. Its dual N-channel MOSFET outputs (DO and DOB) drive complementary coil windings, while the FG/RD pin delivers an open-drain alarm signal triggered on locked-rotor condition.
It integrates protection features including locked-rotor shutdown with automatic recovery, built-in output clamping diodes, and ESD robustness (6kV HBM). The device uses CDMOS process technology to combine CMOS logic, Hall sensor, and power MOSFETs on a single die - enabling compact, high-efficiency fan control without external sense resistors or discrete protection components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.5V to 16V - supports direct 5V/12V fan rail operation with margin for ripple and drop-out |
| Peak Output Current | 1200mA per channel - sufficient to drive large axial or centrifugal cooling fans up to ~3W mechanical output |
| FG/RD Function | Open-drain rotation detection alarm - asserts low on stalled rotor; requires external pull-up for system monitoring |
| Start-up Voltage | 2.5V typical - enables reliable fan spin-up under brown-out or low-input conditions common in server PSUs |
| Operating Temperature | –40°C to +125°C - qualified for industrial and server-grade thermal environments without derating |
| Hall Magnetic Threshold | BOP = 20G typical, BRP = –20G typical - provides robust commutation margin against mechanical vibration and air-gap variation |
| ESD Rating | 6000V HBM - ensures handling survivability during board assembly and field service without additional protection |
Pinout & Package
The AH9282RTR-G1 is housed in a thermally enhanced SOT-89-5 surface-mount package (5-pin, single-row, gull-wing leads), optimized for PCB heat dissipation in fan-control applications. Pin 1 is VCC, Pin 2 is GND, Pin 3 is FG/RD, Pin 4 is DO, and Pin 5 is DOB - matching the standard SOT-89-5 pinout orientation shown in Figure 2 of the datasheet.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC (Pin 1) | Positive supply input | Accepts 2.5–16V DC; powers internal logic, Hall sensor, and gate drivers; bypass capacitor required |
| GND (Pin 2) | Ground reference | Common return for supply, Hall sensor, and output stages; must be low-impedance connection to minimize noise coupling |
| FG/RD (Pin 3) | Open-drain alarm output | Asserts low on locked rotor; requires external pull-up (e.g., 4.7kΩ to 3.3V/5V) for host monitoring or Super I/O interface |
| DO (Pin 4) | Phase A output driver | N-channel MOSFET output driving one motor coil; complements DOB for two-phase commutation |
| DOB (Pin 5) | Phase B output driver | N-channel MOSFET output driving second motor coil; synchronized with DO for continuous rotation |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Hall-effect sensor with dynamic offset correction | Eliminates need for external biasing or calibration; maintains accurate commutation over temperature and aging |
| Locked-rotor shutdown with auto-restart | Prevents thermal damage during fan stall; recovers automatically after fault clears - no host intervention required |
| Built-in output clamping diodes | Suppresses inductive kickback from motor coils; removes need for external flyback diodes and saves PCB area |
| Low 2.5V start-up voltage | Enables fan activation under marginal PSU conditions - critical for fail-safe thermal management in servers and telecom equipment |
| RoHS-compliant green package (G1 suffix) | Meets EU RoHS Directive 2011/65/EU and JEDEC J-STD-020 reflow profile; lead-free and halogen-free construction |
Applications
| PC & Server CPU Cooling | ATX Power Supply Fan Control |
|---|---|
Use Scenario: High-airflow 120mm/140mm CPU cooler fan in desktop and rack-mounted servers requiring silent, reliable thermal response. IC Role / Device Role / Timing Role: Two-phase BLDC motor commutator and rotor position detector; generates FG/RD alarm on thermal throttling-induced stall. Use Value: Enables fan speed regulation via PWM or voltage control while providing real-time stall detection to prevent CPU overheating. |
Use Scenario: 80mm–120mm cooling fan inside ATX or redundant PSUs where space, efficiency, and fault reporting are constrained. IC Role / Device Role / Timing Role: Direct-drive motor controller interfacing with PSU supervisor IC; FG/RD pin feeds alarm signal to PMBus or SMBus host. Use Value: Reduces component count by integrating Hall sensing, drive FETs, and protection - improving PSU MTBF and reducing bill-of-materials cost. |
| Laptop Heatpipe Fan Module | Industrial Enclosure Ventilation Fan |
Use Scenario: Dual-ball-bearing 40mm–60mm fan in ultra-thin laptop chassis with tight thermal envelope and battery-life constraints. IC Role / Device Role / Timing Role: Low-voltage startup motor driver; FG/RD output signals fan failure to EC firmware for OS-level thermal mitigation. Use Value: 2.5V start-up ensures fan operation even during battery brown-out; integrated clamping diodes reduce layout complexity in space-constrained modules. |
Use Scenario: 120mm–200mm cabinet ventilation fan in industrial PLC enclosures exposed to wide ambient temperatures and EMI. IC Role / Device Role / Timing Role: Robust motor driver with –40°C to +125°C operation and 6kV HBM ESD rating for harsh factory-floor environments. Use Value: Eliminates need for external transient suppressors or discrete Hall sensors - simplifying certification for IEC 61000-4-x immunity testing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-coil BLDC fan driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ALLEGRO A3921KLPTR-T | Higher 2A peak current; external Hall sensor required; no integrated clamping diodes | Requires more external components; better suited for custom motor designs with higher torque demands | Select when >1.2A drive or programmable commutation timing is needed; not drop-in due to pinout and sensor architecture differences |
| ON Semiconductor NCP1701ADR2G | Single-coil driver only; no FG/RD output; lacks Hall sensor - requires external rotor position feedback | Designed for simpler, lower-cost fans without stall detection or closed-loop speed reporting | Choose only for cost-sensitive, non-critical cooling where alarm functionality is omitted and external sensing is acceptable |
Compared with AH9282RTR-G1, the A3921 offers higher drive strength but increases BOM complexity and layout area, while the NCP1701 omits core smart-fan features - making AH9282RTR-G1 the optimal balance of integration, reliability, and thermal safety for mid-to-high-end cooling systems.
Availability
AH9282RTR-G1 is available at Aetrix Electronics and suitable for PC cooling systems, server thermal management subsystems, and ATX power supply fan control requiring stable component supply, RoHS compliance, and extended temperature support.
Supply support for AH9282RTR-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 China-based fabless analog and mixed-signal IC designer specializing in power management, motor control, and sensor interface solutions for computing, industrial, and consumer markets.
The AH928x series targets cost-sensitive yet reliability-critical cooling applications, delivering fully integrated BLDC fan drivers with Hall sensing, protection, and alarm signaling - eliminating design compromises between performance, size, and safety.
FAQ
What is the functional difference between AH9281 and AH9282?
AH9281 provides Frequency Generator (FG) tachometer output for speed monitoring, while AH9282 delivers Rotation Detection (RD) alarm output that goes low during rotor stall. Both share identical drive circuitry, Hall sensor, and pinout - only the FG/RD pin behavior differs. The AH9282RTR-G1 variant uses RD mode and is packaged in SOT-89-5 with tape-and-reel delivery.
Can AH9282RTR-G1 drive 24V fans?
No - the absolute maximum supply voltage is 18V, and recommended operating range is 2.5V to 16V. Driving a 24V fan would exceed ratings and risk permanent damage. For 24V systems, external level-shifting or a dedicated 24V fan driver (e.g., MP6532) is required; AH9282RTR-G1 is strictly for 5V/12V fan rails.
Is an external pull-up resistor required on the FG/RD pin?
Yes - the FG/RD pin is open-drain and requires an external pull-up resistor (typically 4.7kΩ to 3.3V or 5V) to establish a valid logic-high state when no fault is present. Without it, the pin remains floating and cannot reliably signal rotation status or stall events to the host monitoring circuit.
Does AH9282RTR-G1 require external flyback diodes across the motor coils?
No - the device integrates clamping diodes across both DO and DOB outputs, explicitly stated in the Features section and confirmed in Absolute Maximum Ratings (VZ = 35V). These diodes suppress inductive energy from coil switching, eliminating the need for external flyback diodes in standard fan applications.
AH9282RTR-G1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOT-89-5/6
- 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:
- Low Side (2)
- Interface:
- On/Off
- Technology:
- CMOS, Power MOSFET
- Step Resolution:
- -
- Applications:
- Fan Motor Driver
- Current - Output:
- 500mA
- Voltage - Supply:
- 2.5V ~ 16V
- Voltage - Load:
- 2.5V ~ 16V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-89-5
AH9282RTR-G1 FAQ
1.How can I place an order for AH9282RTR-G1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AH9282RTR-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 AH9282RTR-G1 reliable?
The price and inventory of AH9282RTR-G1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AH9282RTR-G1 is usually 5 days.
3.What payment methods are accepted for AH9282RTR-G1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AH9282RTR-G1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AH9282RTR-G1?
AH9282RTR-G1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AH9282RTR-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 AH9282RTR-G1?
For technical support, including AH9282RTR-G1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AH9282RTR-G1 requirements.
6.How does Aetrix verify that AH9282RTR-G1 is sourced from the original manufacturer or authorized distributors?
All AH9282RTR-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 AH9282RTR-G1 meets industry standards.
7.What is the process for return or replacement of AH9282RTR-G1?
All AH9282RTR-G1 units undergo pre-shipment inspection (PSI). If there is an issue with AH9282RTR-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 AH9282RTR-G1 part is unused and in its original packaging.
Return procedure for AH9282RTR-G1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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