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Diodes Incorporated AH284-YG-13
- Part No.:
- AH284-YG-13
- Manufacturer:
- Diodes Incorporated
- Category:
- Motor Drivers, Controllers
- Package:
- SOT-89-5/6
- Datasheet:
-
AH284-YG-13.pdf
- Description:
- IC MOTOR DRIVER 3.8V-20V SOT89-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,078
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Product details
Overview
AH284-YG-13 from Diodes Incorporated is an obsolete Hall-effect smart fan motor controller IC designed for two-coil brushless DC (BLDC) cooling fans and low-voltage BLDC motors. It integrates a Hall sensor, dynamic offset correction, dual complementary open-drain drivers with internal Zener protection, and rotor lock detection/shutdown/restart functionality. Operates from 3.8V to 20V, delivers up to 500mA average output current, and is packaged in SOT89-5.
For engineers reviewing the AH284-YG-13 datasheet, AH284-YG-13 pinout, AH284-YG-13 application, or AH284-YG-13 equivalent, this page provides verified technical context, package-specific pin mapping, real-world use cases for BLDC fan control, and validated alternative options for legacy design support and obsolescence mitigation.
Technical Context
The AH284 implements a self-commutating BLDC motor driver architecture with integrated Hall sensing and analog signal conditioning. Its control logic detects magnetic polarity transitions (BOP = 10–60 G, BRP = –60 to –10 G) to sequence complementary DO/DOB outputs, enabling continuous rotation without external timing circuitry.
Rotor lock protection activates after 0.4–0.6 s of stalled condition, forcing both outputs low for 2.4–3.6 s before automatic restart. Output saturation voltage is 375–900 mV at 300–500 mA, and built-in Zener clamping (35–60 V) safeguards against inductive kickback during coil switching.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3.8 V to 20 V - Supports 5 V, 12 V, and 19 V fan rails without external regulation |
| Average Output Current | 500 mA per channel - Sufficient to drive typical 2-coil 40–80 mm PC cooling fans |
| Output Saturation Voltage | 375–900 mV at 300–500 mA - Limits conduction loss and thermal rise in driver stage |
| Rotor Lock Timeout | 0.4–0.6 s detection / 2.4–3.6 s shutdown - Prevents coil burnout during jammed operation |
| Magnetic Sensitivity | BOP: 10–60 G, BRP: –60 to –10 G - Compatible with standard ferrite or NdFeB fan magnets |
| Zener Breakdown Voltage | 35–60 V - Clamps inductive transients from motor coils without external TVS diodes |
| Thermal Resistance θJA | 156 °C/W (SOT89-5) - Requires minimal copper area for 800 mW dissipation at +100°C ambient |
Pinout & Package
Package: SOT89-5 - Thermally enhanced 5-pin surface-mount package with exposed drain pad for improved heat dissipation; footprint compatible with JEDEC TO-243AA.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Vdd | Power input | Supplies internal regulator, Hall sensor, and output drivers; must be decoupled with ≥2.2 μF capacitor |
| DO | Complementary output A | Open-drain N-channel driver; sinks current to GND when active; pairs with DOB for 180° commutation |
| DOB | Complementary output B | Open-drain N-channel driver; phase-inverted relative to DO; enables full-bridge-like 2-coil excitation |
| GND | Ground reference | Common return path for Hall sensor, logic, and output stages; requires low-impedance PCB connection |
| NC | No connect | Internally unconnected pin; must remain floating - no routing or soldering required |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Hall sensor + amplifier | Eliminates external sensing components and calibration; operates over full –40°C to +100°C range |
| Rotor lock protection | Autonomous stall detection and recovery - prevents thermal failure without MCU intervention |
| Internal Zener diode protection | Clamps inductive flyback on DO/DOB pins up to 60 V - removes need for discrete TVS devices |
| Dual complementary open-drain outputs | Enables direct 2-coil BLDC commutation with external pull-up resistors and passive freewheeling paths |
| Green, lead-free, halogen-free packaging | Meets RoHS 2 (2011/65/EU) and Diodes' "Green" definition (<900 ppm Br/Cl, <1000 ppm Sb) |
Applications
| PC Cooling Fan Control | Industrial Blower Motor Drive |
|---|---|
|
Use Scenario: Regulating airflow in desktop and server chassis using 12 V, 2-coil axial fans. IC Role / Device Role / Timing Role: Hall-based commutation controller providing rotor position feedback and synchronized DO/DOB switching. Use Value: Enables silent, reliable fan operation with automatic stall recovery-no firmware or external logic required. |
Use Scenario: Driving compact 24 V blower motors in HVAC duct sensors and industrial enclosures. IC Role / Device Role / Timing Role: Integrated motor driver with wide supply range (3.8–20 V) and thermal-safe shutdown. Use Value: Reduces BOM count by integrating Hall sensing, amplification, and protected outputs in one SOT89-5 package. |
| Embedded System Thermal Management | Medical Diagnostic Equipment Fans |
|
Use Scenario: Maintaining safe operating temperature in network switches, PoE injectors, and edge AI gateways. IC Role / Device Role / Timing Role: Standalone fan controller interfacing directly with standard BLDC fan coils and magnet assemblies. Use Value: Delivers deterministic rotor lock response (≤0.6 s detection) to prevent overheating during dust-clogged operation. |
Use Scenario: Cooling imaging modules and power supplies in portable ultrasound and patient monitors. IC Role / Device Role / Timing Role: Low-noise, EMI-optimized motor driver with internal offset correction for stable Hall signal integrity. Use Value: Ensures consistent fan speed across temperature extremes (–40°C to +100°C), critical for diagnostic uptime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Hall-effect BLDC fan controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AH2985 | Successor device with identical pinout, extended VDD range (up to 24 V), and improved thermal derating curve. | Supports higher-power 24 V fans; retains same rotor lock timing and Hall sensitivity specs. | Drop-in replacement where 24 V operation or enhanced thermal margin is needed. |
| ALLEGRO A3977KLPTR-T | Microstepping stepper driver with Hall input; requires external Hall sensors and logic sequencing. | Targets precision positioning, not simple BLDC fan commutation; lacks integrated rotor lock auto-restart. | Only suitable if system already uses discrete Hall sensors and requires microstepping capability. |
Compared with AH284-YG-13, AH2985 offers direct compatibility plus higher voltage headroom and better thermal performance, while A3977KLPTR-T introduces design complexity and does not replicate the single-chip fan control value proposition.
Availability
AH284-YG-13 is available at Aetrix Electronics and suitable for legacy PC cooling fan control, industrial blower motor drive, and embedded thermal management systems requiring stable component supply despite NRND status.
Supply support for AH284-YG-13 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability power management, signal integrity, and motion control solutions.
The AH284 belongs to Diodes' Hall-effect motor controller product line, engineered specifically for cost-sensitive, high-volume BLDC fan applications where integration, protection, and ease of implementation are prioritized over programmability.
FAQ
Is AH284-YG-13 still in production?
No - AH284-YG-13 is marked NRND (Not Recommended for New Design) and discontinued per Diodes' DS31051 Rev. 12. Aetrix Electronics maintains limited legacy stock for repair and maintenance programs, with full traceability and date-code documentation.
Can AH284-YG-13 be used with 24 V fans?
No - its absolute maximum VDD rating is 24 V, but recommended operating range is strictly 3.8 V to 20 V. Sustained 24 V operation exceeds specification limits and risks premature failure; AH2985 is the designated 24 V-capable successor.
What is the function of the NC pin on SOT89-5?
The NC (No Connect) pin on AH284-YG-13's SOT89-5 package is internally unconnected and serves only as a mechanical stabilizer. It must remain unconnected on the PCB - no routing, pull-up, or grounding is permitted or required.
Does AH284-YG-13 require external pull-up resistors?
Yes - both DO and DOB are open-drain outputs and require external pull-up resistors to VDD. Typical values are 56 Ω (as recommended in the datasheet) to match fan coil impedance and minimize switching transition time.
AH284-YG-13 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:
- Power MOSFET
- Step Resolution:
- -
- Applications:
- Fan Motor Driver
- Current - Output:
- 500mA
- Voltage - Supply:
- 3.8V ~ 20V
- Voltage - Load:
- 3.8V ~ 20V
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-89-5
AH284-YG-13 FAQ
1.How can I place an order for AH284-YG-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AH284-YG-13 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 AH284-YG-13 reliable?
The price and inventory of AH284-YG-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AH284-YG-13 is usually 5 days.
3.What payment methods are accepted for AH284-YG-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AH284-YG-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AH284-YG-13?
AH284-YG-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AH284-YG-13 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 AH284-YG-13?
For technical support, including AH284-YG-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AH284-YG-13 requirements.
6.How does Aetrix verify that AH284-YG-13 is sourced from the original manufacturer or authorized distributors?
All AH284-YG-13 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 AH284-YG-13 meets industry standards.
7.What is the process for return or replacement of AH284-YG-13?
All AH284-YG-13 units undergo pre-shipment inspection (PSI). If there is an issue with AH284-YG-13, 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 AH284-YG-13 part is unused and in its original packaging.
Return procedure for AH284-YG-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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