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Diodes Incorporated AH266K-PG-B-B
- Part No.:
- AH266K-PG-B-B
- Manufacturer:
- Diodes Incorporated
- Category:
- Switches (Solid State)
- Package:
- 4-SSIP
- Datasheet:
-
AH266K-PG-B-B.pdf
- Description:
- MAGNETIC SWITCH LATCH 4SIP
- Quantity:
- Payment:
- Shipping:
Inventory:990
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Product details
Overview
AH266K-PG-B-B from Diodes Incorporated is a high-voltage Hall-effect latch IC designed for electronic commutation in brushless DC motors. It integrates a Hall plate, amplifier, Schmitt trigger, and complementary Darlington open-collector drivers (DO/DOB), operates from 4V to 28V, delivers 400mA continuous output current at +25°C, and functions across –20°C to +85°C - deployed in dual-coil BLDC fans and motor control modules.
For engineers reviewing the AH266K-PG-B-B datasheet, AH266K-PG-B-B pinout, AH266K-PG-B-B application, or AH266K-PG-B-B equivalent, key selection considerations include magnetic switching thresholds (Bop = 10–70 G, Brp = –70 to –10 G), output Zener protection (62 V typ), thermal derating above +25°C, and SIP-4 package compatibility with through-hole motor control PCBs.
Technical Context
The AH266K-PG-B-B implements a latching Hall sensor architecture with built-in hysteresis (Bhy = 80 G typical) to reject noise during magnetic transitions. Its dual complementary outputs (DO low-active, DOB high-active) enable direct drive of external coil windings without external logic inversion.
Internal band-gap regulation provides temperature-compensated biasing across the full 4–28 V supply range. Output stage features Darlington saturation voltage ≤1.5 V at 400 mA and Zener clamp protection rated at 62 V typical to suppress inductive kickback in motor winding applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4 V to 28 V - supports wide-input industrial and automotive BLDC power rails without external regulators |
| Output Current | 400 mA continuous at +25°C - sufficient to directly drive small-to-medium BLDC coil loads |
| Magnetic Bop / Brp | 10–70 G / –70 to –10 G - enables reliable latching commutation under varying air-gap and magnet strength conditions |
| Zener Clamp Voltage | 62 V typical - protects outputs against inductive voltage spikes up to ±62 V during coil switching |
| Operating Temp | –20°C to +85°C - validated for use in enclosed fan housings and motor control enclosures |
| Output Saturation | ≤1.5 V at 400 mA - minimizes power loss and heat generation in Darlington output stage |
| Thermal Resistance | θJA = 227°C/W (SIP-4) - defines maximum power dissipation (550 mW @ +25°C) before thermal shutdown |
Pinout & Package
Package: SIP-4 (Single In-line Package, 4-pin, lead-free, green molding compound).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC (Pin 1) | Power supply input | Accepts 4–28 V DC; powers internal regulator, Hall plate, and output drivers |
| DO (Pin 2) | Complementary output (low-side active) | Sinks current when magnetic field exceeds Bop; latched until field drops below Brp |
| DOB (Pin 3) | Complementary output (high-side active) | Sources current when DO is off; inverted logic state enables push-pull coil driving |
| GND (Pin 4) | Ground reference | Common return path for supply and output currents; must be low-impedance for stable switching |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Hall latch with hysteresis | 80 G typical hysteresis ensures noise-immune magnetic state retention in electrically noisy motor environments |
| Dual complementary Darlington outputs | DO/DOB pair eliminates need for external inverters or level-shifting circuitry in 2-phase BLDC commutation |
| On-chip Zener output protection | 62 V clamping prevents damage from inductive flyback during coil current interruption |
| Wide supply range with band-gap regulation | Stable internal biasing across 4–28 V enables direct connection to unregulated battery or rectified supplies |
| Rugged SIP-4 packaging | Through-hole mechanical robustness supports high-vibration motor mounting and automated assembly |
Applications
| Dual-Coil Brushless DC Fan | Dual-Coil Brushless DC Motor |
|---|---|
Use Scenario: Cooling fan in network switch chassis requiring silent, reliable speed control and long service life. IC Role / Device Role / Timing Role: Hall latch providing rotor position feedback to MCU or dedicated gate driver for precise 2-phase commutation timing. Use Value: Enables zero-crossing detection with 80 G hysteresis, reducing false triggering from EMI and mechanical vibration. | Use Scenario: Small industrial pump motor where compact size and minimal external components are critical. IC Role / Device Role / Timing Role: Direct coil driver interface - DO and DOB sink/source current to energize stator windings in alternating sequence. Use Value: 400 mA output current allows direct coil drive without external transistors, reducing BOM count and board area. |
| Revolution Counting | Speed Measurement |
Use Scenario: Tachometer signal generation in HVAC blower assemblies using a multi-pole magnet on the shaft. IC Role / Device Role / Timing Role: Digital edge generator producing one pulse per magnetic pole transition - used as index signal for RPM calculation. Use Value: Latched output ensures clean, jitter-free pulses even at low rotational speeds (<100 RPM) due to Schmitt-trigger noise rejection. | Use Scenario: Closed-loop speed control in precision lab equipment fans, requiring accurate real-time RPM feedback. IC Role / Device Role / Timing Role: Magnetic event detector feeding frequency-to-voltage converter or microcontroller timer input. Use Value: Fast switching (tr/tf ≤1.5 µs) enables resolution up to 10 kHz input frequency, supporting >600,000 RPM measurement with 1-pole magnet. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Hall-effect latch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ALLEGRO A3291LUA-T | Higher Bop (25–100 G), lower max supply (24 V), integrated reverse polarity protection | Better suited for low-voltage battery-powered fans; lacks Zener clamp for inductive load suppression | Select when reverse supply protection is required and coil energy is low |
| MELEXIS US1881EUA-ABA-000-SP | Lower output current (100 mA), wider temp range (–40°C to +150°C), no Darlington outputs | Requires external driver transistors; preferred for high-temp automotive under-hood use | Select when extended temperature operation is mandatory and external drive is acceptable |
Compared with A3291LUA-T and US1881EUA-ABA-000-SP, AH266K-PG-B-B uniquely balances high output drive (400 mA), robust inductive spike protection (62 V Zener), and cost-effective SIP-4 packaging - making it optimal for mid-power industrial BLDC fans and pumps where board space and component count are constrained.
Availability
AH266K-PG-B-B is available at Aetrix Electronics and suitable for dual-coil brushless DC fans, BLDC motor commutation modules, revolution counting systems, and speed measurement circuits requiring stable component supply and long-term industrial availability.
Supply support for AH266K-PG-B-B 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, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.
The AH266 belongs to Diodes' Hall-effect sensor product line, engineered specifically for robust, low-cost electronic commutation in brushless DC motors and motion-sensing applications where reliability under electrical noise and thermal stress is essential.
FAQ
What is the magnetic sensitivity grade of AH266K-PG-B-B?
The AH266K-PG-B-B is a Grade B device, with magnetic operation point (Bop) up to 100 G and release point (Brp) down to –100 G. This wider threshold range accommodates looser mechanical tolerances in motor assembly and weaker magnets, while maintaining 80 G hysteresis for noise immunity.
Can AH266K-PG-B-B drive coils directly without external transistors?
Yes - its complementary Darlington outputs deliver 400 mA continuous current at +25°C and 150 mA at +85°C, enabling direct drive of small-to-medium BLDC motor coils (e.g., <5 W fans). Thermal derating must be observed above ambient +25°C per the PD vs. TA curve.
Is reverse polarity protection built into AH266K-PG-B-B?
No - AH266K-PG-B-B includes only an internal reverse-protection diode for chip-level reverse power connection (Note 1), not full system-level reverse-voltage protection. External series diode or TVS is recommended if supply polarity reversal is possible in the end application.
What does the "-B-B" suffix indicate in AH266K-PG-B-B?
The "-B-B" suffix denotes magnetic grade B (wider Bop/Brp range) and packaging variant B - both specifying SIP-4 package, 1000-piece bulk packaging, and compliance with RoHS, halogen-free, and antimony-free "Green" standards per Diodes' definitions.
AH266K-PG-B-B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 4-SSIP
- Packaging:
- Bulk
- Product Status:
- Last Time Buy
- Function:
- Latch
- Technology:
- Hall Effect
- Polarization:
- South Pole
- Sensing Range:
- 10mT Trip, -10mT Release
- Test Condition:
- 25°C
- Voltage - Supply:
- 4V ~ 28V
- Current - Supply (Max):
- 10mA
- Current - Output (Max):
- 400mA
- Output Type:
- Open Collector
- Features:
- Temperature Compensated
- Operating Temperature:
- -20°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 4-SIP
AH266K-PG-B-B FAQ
1.How can I place an order for AH266K-PG-B-B through Aetrix?
Please submit a Request for Quotation (RFQ) for AH266K-PG-B-B 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 AH266K-PG-B-B reliable?
The price and inventory of AH266K-PG-B-B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AH266K-PG-B-B is usually 5 days.
3.What payment methods are accepted for AH266K-PG-B-B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AH266K-PG-B-B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AH266K-PG-B-B?
AH266K-PG-B-B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AH266K-PG-B-B 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 AH266K-PG-B-B?
For technical support, including AH266K-PG-B-B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AH266K-PG-B-B requirements.
6.How does Aetrix verify that AH266K-PG-B-B is sourced from the original manufacturer or authorized distributors?
All AH266K-PG-B-B 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 AH266K-PG-B-B meets industry standards.
7.What is the process for return or replacement of AH266K-PG-B-B?
All AH266K-PG-B-B units undergo pre-shipment inspection (PSI). If there is an issue with AH266K-PG-B-B, 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 AH266K-PG-B-B part is unused and in its original packaging.
Return procedure for AH266K-PG-B-B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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