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Diodes Incorporated ATS177-PL-A-A
- Part No.:
- ATS177-PL-A-A
- Manufacturer:
- Diodes Incorporated
- Category:
- Switches (Solid State)
- Package:
- -
- Datasheet:
-
ATS177-PL-A-A.pdf
- Description:
- MAGNETIC SWITCH LATCH 3SIP
- Quantity:
- Payment:
- Shipping:
Inventory:6,758
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Product details
Overview
ATS177-PL-A-A from Diodes Incorporated is a bipolar Hall-effect latch sensor for brushless DC motor commutation, featuring 3.5–20 V operation, -40°C to +125°C operating range, 25 mA sink current, and open-collector DO output. It integrates Hall plate, amplifier, Schmitt trigger, and bandgap regulator for noise-immune magnetic switching in fan and motor control.
For engineers reviewing the ATS177-PL-A-A datasheet, ATS177-PL-A-A pinout, ATS177-PL-A-A application, or ATS177-PL-A-A equivalent, key selection criteria include magnetic operate/release points (Bop/Brp), output saturation voltage (≤700 mV @ 20 mA), temperature-compensated supply regulation, and SIP-3L package compatibility with BLDC pre-driver stages.
Technical Context
The ATS177 implements a monolithic Hall-effect latch with built-in hysteresis (≥80 Gauss) to prevent chatter during magnetic field transitions. Its internal bandgap regulator enables stable operation across 3.5–20 V supply while maintaining consistent Bop/Brp thresholds over temperature.
Magnetic sensing occurs via on-chip Hall plate; signal conditioning includes low-noise amplification and Schmitt-triggered digital output with open-collector topology. Reverse polarity protection and thermal derating (550 mW at 25°C, 0 mW at 150°C) support robust industrial deployment.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 3.5 V to 20 V DC - supports wide-input 12 V/24 V motor control rails without external regulation |
| Output Sink Current | 25 mA max - directly drives NPN transistor bases or logic-level inputs in BLDC gate driver stages |
| Operating Temperature | -40°C to +125°C - qualified for under-hood automotive fans and industrial motor enclosures |
| Bop / Brp (A grade) | 5–70 G / -70–-5 G - provides reliable latching with ≥80 G hysteresis for mechanical vibration immunity |
| VCE(sat) | ≤700 mV @ 20 mA - ensures low power loss and minimal heating when sinking load current |
| Icc Supply Current | 5–10 mA @ 20 V - enables low-quiescent-power operation in battery-backed or energy-sensitive systems |
Pinout & Package
SIP-3L (Single In-line Package, 3-pin, spread lead) with 2.00 mm ±0.10 mm body width, 1.15 mm ±0.10 mm height, and branded top surface indicating active area location.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Vcc | Power input | Supplies internal regulator and sensing circuitry; accepts 3.5–20 V with reverse polarity protection |
| GND | Reference ground | Return path for Hall plate, amplifier, and output stage; must be low-impedance for noise immunity |
| DO | Digital output | Open-collector output that sinks up to 25 mA; requires external pull-up for logic-high state |
Key Features
| Feature | Design Value |
|---|---|
| Bipolar magnetic latching | Switches ON when south pole exceeds Bop (5–70 G), holds until south pole falls below Brp (-70 to -5 G) |
| Integrated bandgap regulator | Provides temperature-stable internal bias, enabling consistent Bop/Brp across -40°C to +125°C |
| Open-collector pre-driver output | Directly interfaces with NPN/PNP transistors or MOSFET gates without level-shifting components |
| Built-in reverse polarity protection | Withstands -20 V reverse VCC without damage-eliminates need for external series diode in 12 V/24 V systems |
Applications
| Brushless DC Motor Commutation | Brushless DC Fan Control |
|---|---|
Use Scenario: Rotor position detection in 3-phase BLDC motors for electronic commutation timing. IC Role / Device Role / Timing Role: Hall latch providing synchronized edge-triggered signals to motor controller ICs for phase sequencing. Use Value: Enables precise 120° electrical angle alignment with <1.5 µs output timing jitter, reducing torque ripple. | Use Scenario: Speed and direction sensing in high-reliability cooling fans for servers and power supplies. IC Role / Device Role / Timing Role: Magnetic zero-crossing detector feeding tachometer counter or PWM feedback loop. Use Value: Delivers stable RPM measurement down to 100 RPM with hysteresis preventing false counts from mechanical bounce. |
| Revolution Counting | Speed Measurement |
Use Scenario: Bidirectional rotation counting in metering applications (e.g., gas/water flow meters). IC Role / Device Role / Timing Role: Edge-detecting latch generating quadrature-compatible pulses per magnet pole pair. Use Value: Supports accurate cumulative count over >10⁹ cycles due to solid-state construction and no mechanical wear. | Use Scenario: Real-time rotational speed monitoring in industrial conveyors and pumps. IC Role / Device Role / Timing Role: Pulse generator whose frequency scales linearly with shaft RPM for analog-to-digital conversion. Use Value: Maintains ±2% accuracy from -20°C to +85°C ambient, validated by magnetic transfer curve stability. |
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 (15–100 G), wider temp range (-40°C to +150°C), but no reverse polarity protection | Preferred for high-temp automotive actuators where external protection is already present | Select when extended junction temperature margin is critical and system-level reverse protection exists |
| Melexis US1881EUA-ABA-001-SP | Lower supply range (3.5–24 V), integrated pull-up, no open-collector flexibility | Suitable for cost-sensitive consumer fans where board space limits external pull-up resistors | Choose when simplified BOM and reduced layout complexity outweigh need for configurable output drive |
Compared with A3291LUA-T and US1881EUA-ABA-001-SP, ATS177-PL-A-A uniquely combines reverse polarity protection, open-collector configurability, and A-grade magnetic thresholds optimized for mid-range BLDC motor control without requiring additional protection or level-shifting circuitry.
Availability
ATS177-PL-A-A 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 automotive, industrial, and computing thermal management programs.
Supply support for ATS177-PL-A-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 power management, signal integrity, and sensing solutions for industrial and automotive markets.
The ATS177 belongs to Diodes' Hall-effect sensor product line, engineered specifically for robust rotor position sensing and commutation feedback in brushless DC motors and fans operating under harsh thermal and electrical conditions.
FAQ
What is the magnetic polarity requirement for ATS177-PL-A-A activation?
The ATS177-PL-A-A activates when a south pole approaches the branded side of the package with magnetic flux density exceeding the operate point (Bop = 5–70 Gauss for A grade). It releases only when the same south pole's field drops below the release point (Brp = -70 to -5 Gauss), ensuring true bipolar latching behavior without need for alternating poles.
Can ATS177-PL-A-A drive a MOSFET gate directly?
No - ATS177-PL-A-A has an open-collector output rated for 25 mA sink current and ≤700 mV saturation voltage, which is insufficient to charge/discharge typical MOSFET gate capacitance rapidly. It is designed as a pre-driver: use it to switch an NPN transistor (e.g., in the provided typical application circuit) that then drives the gate.
Is the SIP-3L package RoHS-compliant and lead-free?
Yes - the "PL" in ATS177-PL-A-A denotes lead-free (Pb-free) construction, and the "A" suffix indicates green molding compound compliant with EU Directive 2002/95/EC (RoHS), with all applicable exemptions applied per Diodes Incorporated's lead-free policy documentation.
How does temperature affect the magnetic switching points?
Bop and Brp exhibit minor negative temperature coefficients: typical drift is ≤0.1% per °C over -40°C to +125°C, verified in the datasheet's "Typical Magnetic Switch Point vs. Temperature" plot. The integrated bandgap regulator stabilizes internal bias, minimizing threshold shift compared to non-compensated Hall sensors.
ATS177-PL-A-A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- *
- Package/Case:
- -
- Packaging:
- Cut Tape (CT)
- Product Status:
- Obsolete
- Function:
- -
- Technology:
- -
- Polarization:
- -
- Sensing Range:
- -
- Test Condition:
- -
- Voltage - Supply:
- -
- Current - Supply (Max):
- -
- Current - Output (Max):
- -
- Output Type:
- -
- Features:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
ATS177-PL-A-A FAQ
1.How can I place an order for ATS177-PL-A-A through Aetrix?
Please submit a Request for Quotation (RFQ) for ATS177-PL-A-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 ATS177-PL-A-A reliable?
The price and inventory of ATS177-PL-A-A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ATS177-PL-A-A is usually 5 days.
3.What payment methods are accepted for ATS177-PL-A-A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ATS177-PL-A-A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ATS177-PL-A-A?
ATS177-PL-A-A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ATS177-PL-A-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 ATS177-PL-A-A?
For technical support, including ATS177-PL-A-A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ATS177-PL-A-A requirements.
6.How does Aetrix verify that ATS177-PL-A-A is sourced from the original manufacturer or authorized distributors?
All ATS177-PL-A-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 ATS177-PL-A-A meets industry standards.
7.What is the process for return or replacement of ATS177-PL-A-A?
All ATS177-PL-A-A units undergo pre-shipment inspection (PSI). If there is an issue with ATS177-PL-A-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 ATS177-PL-A-A part is unused and in its original packaging.
Return procedure for ATS177-PL-A-A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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