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Diodes Incorporated AH266K-PL-B-B
- Part No.:
- AH266K-PL-B-B
- Manufacturer:
- Diodes Incorporated
- Category:
- Switches (Solid State)
- Package:
- 4-SSIP
- Datasheet:
-
AH266K-PL-B-B.pdf
- Description:
- MAGNETIC SWITCH LATCH 4SIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,778
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Product details
Overview
AH266K-PL-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 in SIP-4 package.
For engineers reviewing the AH266K-PL-B-B datasheet, AH266K-PL-B-B pinout, AH266K-PL-B-B application, or AH266K-PL-B-B equivalent, key selection criteria include magnetic operating point (Bop ≤ 70 G), release point (Brp ≥ –70 G), output saturation voltage (VCE(SAT) ≤ 1.5 V @ 400 mA), zener breakdown protection (VZ = 62 V typ.), and thermal resistance (θJA = 227 °C/W).
Technical Context
The AH266K-PL-B-B implements a bipolar latching Hall sensor architecture with built-in band-gap regulator for supply stabilization and temperature compensation. Its dual open-collector outputs (DO and DOB) provide complementary switching states based on magnetic flux polarity and magnitude relative to Bop and Brp thresholds.
It features hysteresis (Bhy = 80 G typical) for noise immunity, internal reverse-protection diode for chip-level reverse power connection, and zener clamping (54–70 V) on outputs to withstand inductive kickback in motor coil drive applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4 V to 28 V - supports wide-range DC bus operation in BLDC fan/motor control without external regulation |
| Output Current | 400 mA continuous @ +25°C - drives medium-power motor coils directly without external buffers |
| Magnetic Bop / Brp | ±10 G to ±70 G (A grade) - enables reliable commutation under varying air-gap and magnet strength conditions |
| VCE(SAT) | 1.1 V typical @ 24 V, 400 mA - limits conduction loss and self-heating during active output state |
| θJA | 227 °C/W (SIP-4) - defines maximum power dissipation (550 mW @ 25°C ambient) before thermal derating |
| Zener Breakdown | 62 V typical - clamps inductive flyback voltage to protect outputs during coil de-energization |
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) | Open-Collector Output | Sinks current when active (low); complements DOB for differential coil drive |
| DOB (Pin 3) | Open-Collector Output | Sinks current when DO is inactive (high); provides latched complementary state |
| GND (Pin 4) | Ground Reference | Common return path for supply and output currents; connects to system ground plane |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Hall Plate + Amplifier + Schmitt Trigger | Enables robust magnetic sensing with 80 G hysteresis, eliminating need for external signal conditioning |
| Complementary Darlington Outputs | Delivers matched, latched DO/DOB states for direct two-phase BLDC coil control without external logic |
| Band-Gap Regulated Supply | Stabilizes internal circuit bias over full 4–28 V input range and temperature, ensuring consistent switching thresholds |
| Output Zener Clamping (62 V typ.) | Protects against inductive voltage spikes up to 70 V, enabling safe operation with unclamped motor windings |
Applications
| Brushless DC Motor Commutation | Brushless DC Fan Control |
|---|---|
Use Scenario: Electronic commutation of 2-phase, 3-wire BLDC motors in HVAC blowers and industrial actuators. IC Role / Device Role / Timing Role: Latching Hall sensor providing synchronized, polarity-dependent switching of motor phase currents. Use Value: Eliminates mechanical brushes and Hall PCB assembly; enables precise rotor position detection with 80 G hysteresis for stable low-RPM operation. | Use Scenario: Speed-regulated cooling fans in power supplies, servers, and telecom equipment. IC Role / Device Role / Timing Role: Magnetic position detector generating commutation edges to drive external MOSFET half-bridges. Use Value: Supports wide 4–28 V input range and 400 mA sink capability, allowing direct coil interface or gate-drive buffering with minimal BOM count. |
| Revolution Counting | Speed Measurement |
Use Scenario: Bidirectional rotation counting in metering systems and industrial encoders. IC Role / Device Role / Timing Role: Bipolar latch detecting N/S pole transitions to generate direction-resolved pulse trains. Use Value: Uses inherent Bop/Brp asymmetry and hysteresis to reject vibration-induced false triggers during low-speed or stop/start events. | Use Scenario: Real-time RPM monitoring in automotive cabin fans and appliance blowers. IC Role / Device Role / Timing Role: Magnetic zero-crossing detector feeding frequency-to-voltage converter or microcontroller timer input. Use Value: Delivers fast, jitter-controlled switching (tr/tf ≤ 5 µs) with <3 µs differential skew, enabling accurate speed resolution down to 10 RPM. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Hall-effect latch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AL33031T-AE-7 | Unipolar latch (Bop only), no DOB output, 200 mA sink, SOIC-8 package | Lacks complementary output and higher current drive; suited for single-coil or indicator use only | Select when cost-sensitive, low-current, space-constrained designs require unipolar detection only |
| US1881EUA-AAA-000 | Bipolar latch, 300 mA sink, SOT-23 package, no integrated zener clamp | Requires external TVS for inductive load protection; lower thermal mass limits duty-cycle in high-power fans | Select when board space is critical and external clamping can be added; avoid in high-dI/dt motor drive |
Compared with AL33031T-AE-7 and US1881EUA-AAA-000, the AH266K-PL-B-B uniquely combines complementary outputs, 400 mA drive, integrated 62 V zener protection, and SIP-4 ruggedness-making it optimal for direct BLDC coil commutation without auxiliary components.
Availability
AH266K-PL-B-B is available at Aetrix Electronics and suitable for brushless DC motor commutation, BLDC fan control, revolution counting, and speed measurement requiring stable component supply across industrial and embedded environments.
Supply support for AH266K-PL-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, specializing in high-reliability, application-optimized components for power management, signal integrity, and sensing.
The AH266 belongs to Diodes' Hall-effect sensor product line, engineered specifically for robust, cost-effective electronic commutation in brushless DC motors and fans under variable voltage and temperature conditions.
FAQ
What is the magnetic sensitivity grade of AH266K-PL-B-B?
The AH266K-PL-B-B is specified as Grade A per its datasheet, with magnetic operating point (Bop) ranging from 10 G to 70 G and release point (Brp) from –70 G to –10 G. This grade ensures reliable latching behavior across standard ferrite and neodymium magnet configurations used in BLDC rotors, with 80 G typical hysteresis for noise margin.
Can AH266K-PL-B-B drive motor coils directly without external transistors?
Yes - AH266K-PL-B-B's complementary Darlington outputs each sink up to 400 mA continuously at +25°C (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: at 85°C ambient, power dissipation is limited to 286 mW, requiring heatsinking or reduced duty cycle for sustained loads.
Does AH266K-PL-B-B include reverse polarity protection?
The device includes an internal reverse-protection diode *only for chip-level reverse power connection* (Note 1), not for full-system reverse battery protection. It does not protect against reverse coil current or back-fed voltage from motor windings. System-level reverse-input protection (e.g., series diode or MOSFET) remains the designer's responsibility.
How does the AH266K-PL-B-B handle inductive kickback from motor coils?
Each output (DO and DOB) incorporates an integrated zener diode with 62 V typical breakdown voltage (54–70 V range), clamping inductive flyback energy during coil turn-off. This eliminates the need for external TVS diodes in many fan and low-power BLDC applications, provided peak transient voltage stays within the 70 V absolute maximum rating.
AH266K-PL-B-B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 4-SSIP
- Packaging:
- Bulk
- Product Status:
- Obsolete
- 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-PL-B-B FAQ
1.How can I place an order for AH266K-PL-B-B through Aetrix?
Please submit a Request for Quotation (RFQ) for AH266K-PL-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-PL-B-B reliable?
The price and inventory of AH266K-PL-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-PL-B-B is usually 5 days.
3.What payment methods are accepted for AH266K-PL-B-B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AH266K-PL-B-B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AH266K-PL-B-B?
AH266K-PL-B-B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AH266K-PL-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-PL-B-B?
For technical support, including AH266K-PL-B-B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AH266K-PL-B-B requirements.
6.How does Aetrix verify that AH266K-PL-B-B is sourced from the original manufacturer or authorized distributors?
All AH266K-PL-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-PL-B-B meets industry standards.
7.What is the process for return or replacement of AH266K-PL-B-B?
All AH266K-PL-B-B units undergo pre-shipment inspection (PSI). If there is an issue with AH266K-PL-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-PL-B-B part is unused and in its original packaging.
Return procedure for AH266K-PL-B-B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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