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Diodes Incorporated AH284-YL-13
- Part No.:
- AH284-YL-13
- Manufacturer:
- Diodes Incorporated
- Category:
- Motor Drivers, Controllers
- Package:
- SOT-89-5/6
- Datasheet:
-
AH284-YL-13.pdf
- Description:
- IC MOTOR DRIVER 3.8V-20V SOT89-5
- Quantity:
- Payment:
- Shipping:
Inventory:5,000
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Product details
Overview
AH284-YL-13 from Diodes Incorporated is an obsolete Hall-effect smart fan motor controller IC designed for two-coil brushless DC (BLDC) cooling fans. It integrates a Hall sensor, dynamic offset correction, dual complementary open-drain drivers with internal Zener protection, and rotor lock detection with automatic restart. Operates from 3.8V to 20V, delivers up to 500mA average output current, and is packaged in SOT89-5.
For engineers reviewing the AH284 datasheet, AH284 pinout, AH284 application, or AH284 equivalent, this page provides verified technical context, package-specific pin functions, real-world use cases in thermal management systems, and validated alternative options for legacy design support and obsolescence mitigation.
Technical Context
The AH284 implements a closed-loop commutation control architecture using integrated Hall sensing to detect rotor position and drive complementary outputs (DO/DOB) for two-phase BLDC motor excitation. Its internal regulator powers the Hall amplifier and logic, while lock-detection circuitry monitors back-EMF absence to trigger shutdown after 0.5s and auto-restart upon recovery.
It features built-in Zener clamping (35–60V breakdown) on both outputs to suppress inductive kickback, and operates across –40°C to +100°C ambient with thermal derating curves defined for SOT89-5 (800mW at 25°C, down to 0mW at 150°C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3.8V to 20V - Supports 5V, 12V, and 19V fan rails without external regulation. |
| Average Output Current | 500mA per channel - Sufficient to drive typical 2-coil BLDC fans up to ~3W mechanical output. |
| Rotor Lock Response Time | tRLP-ON = 0.5s (typ), tRLP-OFF = 3s (typ) - Provides deterministic stall detection and safe recovery timing. |
| Output Saturation Voltage | VOUT(SAT) = 625mV @ 500mA - Limits conduction loss and self-heating during continuous operation. |
| Magnetic Sensitivity | BOP = 10–60G, BRP = –60 to –10G - Compatible with standard ferrite or NdFeB rotor magnets at air gaps ≤1.1mm. |
| Thermal Resistance θJA | 156°C/W (SOT89-5) - Requires minimal PCB copper area (≥100mm²) for full-power operation at 70°C ambient. |
Pinout & Package
Package: SOT89-5 - Thermally enhanced 5-pin surface-mount package with exposed thermal pad (pin 5 = GND). Pin 4 is NC (not connected); Vdd, DO, DOB, and GND are functional terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Vdd | Power input | Supplies internal regulator, Hall sensor, and driver stages; must be decoupled with ≥2.2μF capacitor near pin. |
| DO | Complementary output A | Open-drain N-channel driver; sinks current to GND when active; requires external pull-up to Vdd or higher rail. |
| DOB | Complementary output B | Open-drain N-channel driver, phase-inverted relative to DO; enables 120° commutation for 2-coil BLDC motors. |
| GND | Ground reference | Common return for Hall sensor, logic, and output drivers; connects to thermal pad for heat dissipation. |
| NC | No connection | Internally unconnected; must remain floating or tied to GND per layout guidelines-no signal routing allowed. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Hall sensor + amplifier | Eliminates need for external magnetic sensing components and signal conditioning circuitry. |
| Rotor lock protection with auto-restart | Prevents coil burnout during stalled conditions and restores operation without host intervention. |
| Internal Zener diode protection | Clamps inductive flyback voltage up to 60V, removing requirement for external TVS or Zener diodes. |
| Green, RoHS-compliant packaging | Lead-free, halogen-free, and antimony-free molding compound meets EU Directive 2011/65/EU and JEDEC J-STD-020. |
Applications
| Server CPU Cooling Fan | Industrial PLC Fan Module |
|---|---|
|
Use Scenario: Continuous-speed 12V BLDC fan mounted on high-density server heatsink with airflow monitoring. IC Role / Device Role / Timing Role: Hall-based commutation controller providing synchronized phase switching and stall detection. Use Value: Enables reliable fan operation under dust-clogged or thermal-throttling conditions via automatic lock recovery and low-noise switching. |
Use Scenario: Enclosed programmable logic controller cabinet requiring forced-air cooling across wide ambient temperature range (–40°C to +70°C). IC Role / Device Role / Timing Role: Motor driver with integrated magnetic sensing and thermal-safe shutdown behavior. Use Value: Reduces BOM count by integrating Hall sensor, driver, and protection-critical for space-constrained industrial enclosures. |
| Network Switch Heat Management | Medical Diagnostic Equipment Ventilation |
|
Use Scenario: Multi-port Ethernet switch with dual redundant fans operating in parallel under variable load-induced thermal profiles. IC Role / Device Role / Timing Role: Dual-output BLDC controller enabling independent fan control with shared Hall feedback. Use Value: Delivers precise speed regulation and fault resilience-fan continues running if one coil fails due to open-circuit detection. |
Use Scenario: Portable ultrasound or imaging device requiring ultra-low EMI fan control in proximity to sensitive analog front-end circuits. IC Role / Device Role / Timing Role: Low-noise Hall-commutated motor driver minimizing conducted emissions through soft-switching and Zener-clamped outputs. Use Value: Meets IEC 60601-1 EMI limits without added filtering, reducing system-level qualification risk. |
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 part with identical pinout, extended VDD range (3.3V–24V), lower IDD (1.5mA typ), and improved BOP/BRP tolerance (±15G hysteresis). | Supports lower-voltage fans (e.g., 3.3V logic-controlled systems) and offers tighter magnetic consistency over temperature. | Preferred for new designs where supply headroom is limited or magnetic environment varies significantly. |
| ZXBM5212 | Discrete Hall + dual MOSFET gate driver; requires external Hall sensor and Zener clamps; higher board area and component count. | Used where programmable dead-time, adjustable lock timeout, or multi-fan synchronization is required. | Applicable only when AH284's fixed timing and integrated sensor are insufficient-adds design complexity but improves flexibility. |
Compared with AH284, AH2985 offers drop-in compatibility with enhanced voltage range and lower quiescent current, while ZXBM5212 trades integration for configurability-making AH284 optimal for cost-sensitive, space-constrained legacy fan modules where fixed-function reliability is prioritized.
Availability
AH284-YL-13 is available at Aetrix Electronics and suitable for server thermal management, industrial PLC cooling, network switch heat dissipation, and medical diagnostic equipment ventilation requiring stable component supply despite NRND status.
Supply support for AH284-YL-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 power management, signal integrity, and precision sensing solutions for industrial, computing, and consumer markets.
The AH284 belongs to Diodes' Hall-effect motor controller product line, engineered specifically for compact, low-cost BLDC fan drives in thermally demanding environments where integration, protection, and reliability are critical.
FAQ
Is AH284-YL-13 still in production?
No-AH284-YL-13 is marked NRND (Not Recommended for New Design) and discontinued per Diodes' DS31051 Rev. 12. Aetrix maintains limited legacy stock for repair and maintenance programs, with full traceability and date-code documentation provided upon request.
Can AH284-YL-13 be used with 3.3V logic systems?
No-AH284 requires minimum 3.8V VDD for proper Hall sensor and amplifier operation. Attempting 3.3V operation results in unreliable commutation or failure to start. For 3.3V-compatible alternatives, AH2985 supports down to 3.3V and shares the same SOT89-5 footprint.
What is the function of the NC pin in SOT89-5 package?
Pin 4 in the SOT89-5 package is designated NC (Not Connected) and is internally unconnected. It must not be used for signal routing or grounding. Per Diodes' layout guidance, it may be left floating or tied to GND solely for mechanical stability-no electrical function is assigned.
Does AH284 require external flyback protection diodes?
No-AH284 includes internal Zener diodes (35–60V breakdown) across each output (DO and DOB) to clamp inductive kickback. External flyback diodes are unnecessary unless system-level surge requirements exceed 60V, in which case a higher-voltage external TVS may be added in parallel.
AH284-YL-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-YL-13 FAQ
1.How can I place an order for AH284-YL-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AH284-YL-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-YL-13 reliable?
The price and inventory of AH284-YL-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-YL-13 is usually 5 days.
3.What payment methods are accepted for AH284-YL-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AH284-YL-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AH284-YL-13?
AH284-YL-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AH284-YL-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-YL-13?
For technical support, including AH284-YL-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AH284-YL-13 requirements.
6.How does Aetrix verify that AH284-YL-13 is sourced from the original manufacturer or authorized distributors?
All AH284-YL-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-YL-13 meets industry standards.
7.What is the process for return or replacement of AH284-YL-13?
All AH284-YL-13 units undergo pre-shipment inspection (PSI). If there is an issue with AH284-YL-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-YL-13 part is unused and in its original packaging.
Return procedure for AH284-YL-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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