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Diodes Incorporated ATS276H-PG-B-A
- Part No.:
- ATS276H-PG-B-A
- Manufacturer:
- Diodes Incorporated
- Category:
- Switches (Solid State)
- Package:
- 4-SSIP
- Datasheet:
-
ATS276H-PG-B-A.pdf
- Description:
- MAGNETIC SWITCH LATCH 4SDIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,752
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Product details
Overview
ATS276H-PG-B-A from Diodes Incorporated is a complementary-output Hall-effect latch IC designed for electronic commutation in dual-coil brushless DC fans and motors. It features 3.5V–20V operating voltage, 400mA average output sink current per channel, ±300G magnetic operate/release thresholds (H-grade), and integrated regulator, protection diode, Hall plate, amplifier, comparator, and open-collector DO/DOB outputs.
For engineers reviewing the ATS276H-PG-B-A datasheet, ATS276H-PG-B-A pinout, ATS276H-PG-B-A application, or ATS276H-PG-B-A equivalent, this device is selected for precise rotor position sensing in BLDC fan control where complementary latched outputs drive external NPN/PNP pairs, require reverse-polarity tolerance on VCC, and operate across industrial ambient temperatures (−20°C to +85°C).
Technical Context
The ATS276H-PG-B-A implements a bipolar latching Hall sensor with H-grade magnetic sensitivity (BOP = ±300G typ., BRP = ∓300G typ., BHYS = 75G min.), enabling robust detection of alternating North/South pole transitions. Its dual open-collector outputs (DO and DOB) are complementary and latched-DO turns low when B > BOP, DOB turns high, and both retain state until B < BRP.
Internally regulated operation supports wide supply range (3.5V–20V); built-in reverse-polarity protection diode safeguards only the IC side-not coil-side-requiring external diode for full system-level reverse-current blocking. Output saturation voltage is ≤0.6V at 300mA, ensuring efficient switching into typical fan driver stages.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Voltage | 3.5V to 20V - enables direct integration into 5V, 12V, and 24V BLDC fan power rails without external regulation |
| Output Sink Current | 400mA avg., 700mA peak - drives standard NPN transistor bases or low-RDS(on) MOSFET gates directly |
| Magnetic Sensitivity (H-grade) | BOP = ±300G typ., BRP = ∓300G typ. - optimized for reliable commutation with common ferrite or NdFeB rotor magnets |
| Output Configuration | Complementary open-collector DO/DOB - eliminates need for external logic inversion in dual-phase motor drive |
| Operating Temperature | −20°C to +85°C - validated for continuous use in enclosed fan housings and industrial enclosures |
| Package | SIP-4L (Single In-line Package, 4-pin, lead-free, green compound) - surface-mount compatible with standard reflow profiles |
| Supply Current | 16–25mA at VCC = 20V - low quiescent draw minimizes standby power in always-on fan control systems |
Pinout & Package
ATS276H-PG-B-A is housed in a low-profile SIP-4L package (4-pin single in-line, 1.95mm pitch, 0.7mm active area depth). Pin 1 is VCC, Pin 2 is DO (complementary output A), Pin 3 is DOB (complementary output B), and Pin 4 is GND. The package is RoHS-compliant, lead-free, and uses halogen-free molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VCC | Power supply input | Accepts 3.5V–20V; includes internal regulator and reverse-polarity protection diode (IC-side only) |
| 2 - DO | Open-collector output A | Latched low when magnetic flux exceeds BOP; sinks up to 400mA; requires external pull-up |
| 3 - DOB | Open-collector output B | Complementary to DO - latched high when DO is low; used for push-pull or totem-pole drive staging |
| 4 - GND | Ground reference | Common return for internal regulator, Hall sensor, and output drivers; must be low-impedance |
Key Features
| Feature | Design Value |
|---|---|
| Complementary latched outputs | DO and DOB provide true hardware-level phase inversion without external logic or timing delay |
| H-grade magnetic hysteresis | 75G minimum hysteresis prevents chatter during slow or noisy rotor transitions near BOP/BRP |
| Integrated reverse-polarity protection | On-chip diode protects IC from −20V VCC transients - reduces BOM count but requires external diode for coil-side safety |
| Wide supply voltage range | 3.5V–20V operation allows single-part support across 5V microcontroller interfaces and 12V/24V fan bus systems |
| Low output saturation voltage | VCE(SAT) ≤ 0.6V @ 300mA ensures minimal power loss and thermal rise in output stage |
Applications
| BLDC Fan Commutation | Revolution Counting |
|---|---|
Use Scenario: Detecting rotor pole transitions in 2-phase brushless DC cooling fans for PC, server, and industrial enclosures. IC Role / Device Role / Timing Role: Hall latch providing synchronized, latched position signals to external driver transistors controlling coil energization sequence. Use Value: Enables precise 120° electrical commutation with no software timing dependency; H-grade sensitivity ensures reliable triggering across magnet aging and temperature drift. |
Use Scenario: Monitoring rotational speed and direction in HVAC blowers and precision instrumentation fans. IC Role / Device Role / Timing Role: Magnetic edge detector generating clean, jitter-free pulse trains proportional to shaft RPM. Use Value: Complementary outputs allow direction discrimination via XOR logic; 75G hysteresis rejects mechanical vibration noise during low-speed counting. |
| Speed Measurement | Dual-Coil Motor Control |
Use Scenario: Real-time tachometer feedback in automotive cabin fans and medical equipment airflow systems. IC Role / Device Role / Timing Role: Latched Hall sensor converting magnetic pole crossings into stable digital pulses for MCU timer capture. Use Value: 400mA sink capability drives long traces or optocoupler inputs directly; 3.5V–20V range accommodates battery-backed or mains-derived supplies. |
Use Scenario: Driving two independent coil windings in small-appliance motors (e.g., power tools, vacuum cleaners). IC Role / Device Role / Timing Role: Dual-channel commutation controller delivering anti-phase drive signals to half-bridge gate drivers. Use Value: Complementary DO/DOB outputs eliminate external inverters; SIP-4L footprint simplifies PCB layout in space-constrained motor modules. |
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 | Unipolar latch (not complementary); 25mA max output sink; SOIC-8 package | Lacks DO/DOB complementarity - requires external inverter for dual-coil drive; lower current limits need buffer transistors | Select only if board space permits SOIC-8 and design tolerates added logic complexity and reduced drive strength |
| Melexis US1881EUA-ABA-002-SP | Bipolar latch with single open-drain output; 20mA sink; TO-92 package; no integrated reverse-protection diode | No complementary output - unsuitable for direct totem-pole drive; TO-92 requires through-hole assembly and lacks SIP-4L SMT compatibility | Prefer only for legacy through-hole designs where low-cost unidirectional sensing suffices and external protection is already implemented |
Compared with A3281LUA-T and US1881EUA-ABA-002-SP, ATS276H-PG-B-A uniquely delivers complementary latched outputs in an SMT SIP-4L package with 400mA drive and on-chip reverse-polarity protection-making it the only drop-in solution for compact, high-reliability BLDC fan commutation without added components.
Availability
ATS276H-PG-B-A is available at Aetrix Electronics and suitable for BLDC fan commutation, revolution counting, speed measurement, and dual-coil motor control requiring stable component supply, consistent magnetic performance across temperature, and RoHS-compliant manufacturing.
Supply support for ATS276H-PG-B-A 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, cost-optimized solutions for power management, signal integrity, and motion control.
The ATS276 series belongs to Diodes' Hall-effect sensor product line, engineered specifically for brushless DC motor commutation in cost-sensitive, high-volume cooling applications where latch stability, output drive strength, and package simplicity are critical.
FAQ
What is the magnetic polarity behavior of ATS276H-PG-B-A?
The ATS276H-PG-B-A is a bipolar latching Hall-effect sensor: DO turns low when exposed to a South pole (B > +300G), and remains latched until a North pole (B < −300G) resets it. DOB operates inversely-high during South exposure, low after North reset. This enables deterministic, polarity-dependent commutation without external logic.
Can ATS276H-PG-B-A drive a MOSFET gate directly?
Yes-its 400mA sink capability and ≤0.6V saturation voltage at 300mA allow direct connection to the gate of logic-level N-channel MOSFETs (e.g., IRLML2502) with appropriate pull-up resistors. For high-side P-channel or high-threshold MOSFETs, an external level-shifting or buffer stage is required.
Is external reverse-voltage protection needed on the coil side?
Yes. The internal diode protects only the IC's VCC pin from reverse polarity; it does not block reverse current from inductive coil back-EMF. An external Schottky diode (e.g., 1N5819) must be placed across the motor coil terminals to prevent damage during power reversal or fast deceleration.
How does the H-grade magnetic specification differ from G-grade?
H-grade (used in ATS276H-PG-B-A) specifies tighter BOP/BRP symmetry (±300G typ.) and higher hysteresis margin versus G-grade (±100G typ.). This improves immunity to air-gap variation, magnet strength tolerance, and thermal drift-critical for fan applications where consistent commutation timing affects acoustic noise and efficiency.
ATS276H-PG-B-A 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:
- 5mT Trip, -5mT 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-A FAQ
1.How can I place an order for ATS276H-PG-B-A through Aetrix?
Please submit a Request for Quotation (RFQ) for ATS276H-PG-B-A 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-A reliable?
The price and inventory of ATS276H-PG-B-A 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-A is usually 5 days.
3.What payment methods are accepted for ATS276H-PG-B-A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ATS276H-PG-B-A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ATS276H-PG-B-A?
ATS276H-PG-B-A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ATS276H-PG-B-A 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-A?
For technical support, including ATS276H-PG-B-A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ATS276H-PG-B-A requirements.
6.How does Aetrix verify that ATS276H-PG-B-A is sourced from the original manufacturer or authorized distributors?
All ATS276H-PG-B-A 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-A meets industry standards.
7.What is the process for return or replacement of ATS276H-PG-B-A?
All ATS276H-PG-B-A units undergo pre-shipment inspection (PSI). If there is an issue with ATS276H-PG-B-A, 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-A part is unused and in its original packaging.
Return procedure for ATS276H-PG-B-A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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