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Home > Products > Sensors, Transducers > Magnetic Sensors > Switches (Solid State)

Diodes Incorporated ATS276H-PG-B-B

Name: ATS276H-PG-B-B
Brand: Diodes Incorporated
SKU: ATS276H-PG-B-B
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ATS276H-PG-B-B

Manufacturer:: Diodes Incorporated

Category:: Switches (Solid State)

Package:: 4-SSIP

Datasheet:: ATS276H-PG-B-B.pdf

Description:: MAGNETIC SWITCH LATCH 4SDIP

Quantity:: RFQ Add To RFQ list

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Product details

Overview

ATS276H-PG-B-B from Diodes Incorporated is a complementary-output Hall-effect latch IC designed for electronic commutation in dual-coil brushless DC fans. It features 3.5–20 V operating voltage, 400 mA average output sink current per channel, ±300 G magnetic operate/release thresholds (H-grade), and integrated reverse-polarity protection diode on chip-side only. Used in fan motor control where latched complementary outputs drive external coil drivers.

For engineers reviewing the ATS276H-PG-B-B datasheet, ATS276H-PG-B-B pinout, ATS276H-PG-B-B application in BLDC fan commutation, or ATS276H-PG-B-B equivalent for Hall latch replacement, this page delivers verified electrical specs, magnetic characteristics (Bop/Brp = ±300 G), thermal derating data, SIP-4L package layout, and real-world selection guidance against functional alternatives.

Technical Context

The ATS276H-PG-B-B integrates a Hall plate, chopper-stabilized amplifier, Schmitt-trigger comparator, voltage regulator, and dual open-collector complementary outputs (DO and DOB) in a single SIP-4L package. Its H-grade magnetic sensitivity provides Bop = +300 G (typ), Brp = –300 G (typ), with 75 G hysteresis to prevent chatter under noisy fields.

Each output latches until magnetic polarity reversal crosses its release point; DO sinks current when B > Bop (S-pole), DOB sinks when B < Brp (N-pole). Internal reverse-voltage protection diode guards only the IC side - external diode required for coil-side reverse-current blocking in fan applications.

Key Specifications

Parameter	Value and Actual Design Meaning
Operating Voltage	3.5 V to 20 V - supports wide-input 12 V/24 V fan supplies without external regulation
Output Sink Current	400 mA avg., 700 mA peak - drives gate resistors or small-signal transistors directly in fan driver stages
Magnetic Sensitivity (H-grade)	Bop = +300 G (typ), Brp = –300 G (typ) - optimized for standard ferrite magnet spacing in 40–120 mm fans
Output Saturation Voltage	V_CE(SAT) = 0.3–0.6 V @ 300 mA - minimizes power loss and heat rise in high-duty-cycle commutation
Supply Current	16–25 mA @ V_CC = 20 V - enables low-quiescent design in always-on fan control modules
Operating Temperature	–20 °C to +85 °C - qualified for industrial and commercial fan environments with airflow-limited heatsinking
Package Thermal Resistance	P_D = 550 mW @ T_A = 25 °C, derates linearly to 0 at 150 °C - defines max continuous power in confined enclosures

Pinout & Package

ATS276H-PG-B-B uses a low-profile 4-pin SIP-4L (Single In-line Package) with gull-wing leads, RoHS-compliant lead-free finish, and green molding compound (no Br/Sb). Pin 1 is V_CC, Pin 2 is DO (complementary output A), Pin 3 is DOB (complementary output B), and Pin 4 is GND. The active Hall sensor is centered beneath the marking side, 0.7 mm below top surface.

Pin/Terminal	Circuit Role	Design Meaning
Pin 1 (V_CC)	Power supply input	Accepts 3.5–20 V; internal regulator powers analog front-end and logic; reverse-polarity diode connected here protects IC-side only
Pin 2 (DO)	Open-collector output A	Sinks current when S-pole field exceeds Bop; latched until N-pole field drops below Brp; used for coil 1 drive control
Pin 3 (DOB)	Open-collector output B	Complementary to DO - high when DO is low, low when DO is high; used for coil 2 drive control
Pin 4 (GND)	Ground reference	Common return for V_CC, outputs, and internal circuitry; must be low-impedance path to minimize switching noise coupling

Key Features

Feature	Design Value
Complementary latched outputs	DO and DOB provide true anti-phase switching without external logic - reduces external component count in 2-phase BLDC fan drivers
H-grade magnetic threshold	±300 G operate/release points - ensures reliable commutation across magnet aging, temperature drift, and air-gap variation in mass-produced fans
Integrated reverse-voltage protection	On-chip diode between V_CC and GND - prevents damage during accidental reverse connection, but requires external diode for coil-side protection
Chopper-stabilized amplifier	Eliminates offset drift over temperature and time - maintains consistent Bop/Brp across –20 °C to +85 °C ambient range
Thermal derating curve	Linear power dissipation reduction from 550 mW at 25 °C to 0 at 150 °C - enables accurate thermal design in sealed fan housings

Applications

Brushless DC Fan Commutation

Revolution Counting

Use Scenario: Two-phase electronic commutation of 40–120 mm axial fans using external N-channel MOSFETs or bipolar transistors.

IC Role / Device Role / Timing Role: Hall latch providing synchronized, latched phase signals to drive upper/lower coil switches in sequence.

Use Value: Eliminates need for microcontroller-based timing; ±300 G thresholds ensure stable switching despite magnet tolerance and thermal drift.

Use Scenario: Monitoring rotational speed and direction of rotating shafts in HVAC blowers or server cooling systems.

IC Role / Device Role / Timing Role: Magnetic zero-crossing detector generating two-phase quadrature pulses per revolution.

Use Value: Complementary outputs enable direction detection without additional logic; 75 G hysteresis rejects vibration-induced false triggers.

Speed Measurement

Dual-Coil Motor Control

Use Scenario: Closed-loop RPM feedback for variable-speed fan controllers in telecom power supplies.

IC Role / Device Role / Timing Role: Pulse generator whose frequency scales linearly with shaft speed; DO/DOB edges define precise timing windows.

Use Value: 0.3–0.6 V saturation voltage ensures clean TTL-compatible edges into MCU timers even at 20 V supply.

Use Scenario: Driving dual-winding stepper-like motors in precision positioning actuators or small pumps.

IC Role / Device Role / Timing Role: Latching position sensor enabling half-step excitation sequences via external H-bridge drivers.

Use Value: Built-in 400 mA sink capability allows direct drive of gate resistors for discrete FETs - no level-shifting needed.

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 A3281LUA-T	Single-ended output (not complementary); Bop = ±250 G; 250 mA sink current	Requires external inverter for complementary drive; lower current limits use with higher-R gate drivers	Select when space or cost constraints preclude dual-output requirement and coil current ≤250 mA
Melexis US1881EUA-ABA-002-SP	Complementary outputs; Bop = ±200 G; 350 mA sink; wider temp range (–40 to +125 °C)	Lower sensitivity requires stronger magnets or tighter air gaps; better suited for automotive under-hood use	Select for extended temperature operation or where magnet strength permits lower Bop

Compared with A3281LUA-T and US1881EUA-ABA-002-SP, ATS276H-PG-B-B offers higher sink current (400 mA), tighter H-grade magnetic thresholds (±300 G), and integrated reverse-voltage protection - making it optimal for cost-sensitive, high-volume 12/24 V fan designs where robust commutation is critical.

Availability

ATS276H-PG-B-B is available at Aetrix Electronics and suitable for brushless DC fan commutation, revolution counting, speed measurement, and dual-coil motor control requiring stable component supply, consistent magnetic thresholds, and SIP-4L through-hole compatibility.

Supply support for ATS276H-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, specializing in power management, signal integrity, and sensing solutions for industrial, computing, and consumer markets.

The ATS276 series belongs to Diodes' Hall-effect sensor product line, engineered specifically for reliable, low-cost electronic commutation in brushless DC fans and motion-sensing applications requiring latched complementary outputs.

FAQ

What is the magnetic polarity response of ATS276H-PG-B-B?

ATS276H-PG-B-B responds to both magnetic polarities: DO turns ON (low) when an S-pole exceeds +300 G (Bop), and remains latched until an N-pole drops below –300 G (Brp); DOB operates complementarily. This enables true bipolar latching without external inversion logic.

Can ATS276H-PG-B-B drive MOSFET gates directly?

Yes - each output sinks up to 400 mA continuously, sufficient to drive standard N-channel MOSFET gate resistors (e.g., 10–47 Ω) in fan driver circuits. V_CE(SAT) ≤0.6 V at 300 mA ensures minimal voltage drop and heating during active commutation phases.

Is external reverse-voltage protection required for fan coil connections?

Yes - the internal diode protects only the IC side of V_CC. When the fan coil is reverse-connected, back-EMF can damage external drivers. An external series diode on the coil supply line is mandatory to block reverse current from the coil side.

How does temperature affect magnetic switching points?

Magnetic operate (Bop) and release (Brp) points shift <±0.1% per °C - negligible over –20 °C to +85 °C. The datasheet confirms stable ±300 G thresholds across this range, validated by chopper stabilization and matched comparator design.

ATS276H-PG-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:: Unidirectional

Sensing Range:: 7mT Trip, -7mT Release

Test Condition:: 25°C

Voltage - Supply:: 3.5V ~ 20V

Current - Supply (Max):: 25mA

Current - Output (Max):: -

Output Type:: Open Collector

Features:: -

Operating Temperature:: -20°C ~ 85°C

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: 4-SIP

ATS276H-PG-B-B FAQ

1.How can I place an order for ATS276H-PG-B-B through Aetrix?

Please submit a Request for Quotation (RFQ) for ATS276H-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 ATS276H-PG-B-B reliable?

The price and inventory of ATS276H-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 ATS276H-PG-B-B is usually 5 days.

3.What payment methods are accepted for ATS276H-PG-B-B?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ATS276H-PG-B-B transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ATS276H-PG-B-B?

ATS276H-PG-B-B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ATS276H-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 ATS276H-PG-B-B?

For technical support, including ATS276H-PG-B-B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ATS276H-PG-B-B requirements.

6.How does Aetrix verify that ATS276H-PG-B-B is sourced from the original manufacturer or authorized distributors?

All ATS276H-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 ATS276H-PG-B-B meets industry standards.

7.What is the process for return or replacement of ATS276H-PG-B-B?

All ATS276H-PG-B-B units undergo pre-shipment inspection (PSI). If there is an issue with ATS276H-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 ATS276H-PG-B-B part is unused and in its original packaging.

Return procedure for ATS276H-PG-B-B:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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