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Diodes Incorporated ATS177-PG-B-A
- Part No.:
- ATS177-PG-B-A
- Manufacturer:
- Diodes Incorporated
- Category:
- Switches (Solid State)
- Package:
- 3-SIP
- Datasheet:
-
ATS177-PG-B-A.pdf
- Description:
- MAGNETIC SWITCH LATCH 3SIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,874
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Product details
Overview
ATS177-PG-B-A from Diodes Incorporated is a bipolar Hall-effect latch sensor in SIP-3L package, designed for electronic commutation in brushless DC motors. It operates from 3.5V to 20V, delivers 25mA sink current, features built-in reverse polarity protection, and functions across –40°C to +125°C ambient temperature. Its magnetic operate point (Bop) is up to 100 Gauss and release point (Brp) down to –100 Gauss, enabling robust rotor position sensing in motor control.
For engineers reviewing the ATS177-PG-B-A datasheet, ATS177-PG-B-A pinout, ATS177-PG-B-A application, or ATS177-PG-B-A equivalent, key selection criteria include open-collector output drive capability, magnetic hysteresis (≥80 Gauss), wide supply range, thermal derating behavior, and SIP-3L PCB footprint compatibility with BLDC fan and motor control layouts.
Technical Context
The ATS177 integrates a Hall plate, amplifier, Schmitt trigger with hysteresis, and bandgap-regulated internal supply. Its latch behavior holds output state until magnetic polarity reversal crosses Brp, eliminating chattering in rotating-field environments.
It uses an open-collector DO pin driven by an NPN transistor capable of sinking 25mA continuously, with VCE(sat) ≤ 700mV at 20mA and leakage <10µA. Reverse polarity protection allows direct connection to unregulated 12V/24V motor power rails without external diodes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3.5V to 20V DC - supports direct connection to common BLDC motor bus voltages without regulation |
| Output Sink Current | 25mA max - drives standard NPN/PNP pre-driver stages or small-signal MOSFET gates directly |
| Magnetic Bop / Brp | ±100 Gauss (B grade) - enables reliable switching with low-strength ferrite magnets at air gaps up to 2.5mm |
| Hysteresis (Bhy) | ≥80 Gauss - prevents false triggering from vibration or EMI-induced field fluctuations |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive fan and industrial motor environments |
| VCE(sat) | ≤700mV @ 20mA - minimizes power loss and self-heating during continuous commutation |
| Reverse Polarity Protection | Integrated - eliminates need for external series diode, saving board space and forward-drop loss |
Pinout & Package
The ATS177-PG-B-A is housed in a 3-pin SIP-3L (Single In-line Package) with gull-wing leads, 2.00mm lead pitch, and branded top surface indicating active area location. Package meets RoHS-compliant green molding compound requirements (no Br/Sb).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Vcc (Pin 1) | Positive power supply input | Accepts 3.5–20V; powers internal regulator, Hall plate, and output stage |
| GND (Pin 2) | Ground reference | Common return for supply and output load; must be low-impedance path to minimize noise coupling |
| DO (Pin 3) | Digital open-collector output | Sinks current when latched ON; requires external pull-up to define logic HIGH level and drive strength |
Key Features
| Feature | Design Value |
|---|---|
| Bipolar latch operation | Retains output state until magnetic polarity reversal crosses Brp - enables precise two-phase commutation timing |
| Wide supply range (3.5–20V) | Eliminates need for dedicated LDO in 12V/24V motor control boards - reduces BOM count and layout complexity |
| Temperature-compensated bandgap regulator | Maintains stable internal bias over –40°C to +125°C - ensures consistent Bop/Brp across operating range |
| SIP-3L package with spread leads | Enables manual or automated through-hole assembly; compatible with standard 2.54mm pitch fan motor PCB footprints |
| Green molding compound (RoHS) | Complies with EU Directive 2002/95/EC exemptions - supports global industrial and automotive product certifications |
Applications
| Brushless DC Motor Commutation | Brushless DC Fan Control |
|---|---|
Use Scenario: Rotor position detection in 3-phase BLDC motors for HVAC compressors and power tools. IC Role / Device Role / Timing Role: Hall latch providing synchronized phase-switching signals to gate drivers. Use Value: Enables precise 120° electrical sector alignment with ±100 Gauss sensitivity and 80 Gauss hysteresis to reject mechanical vibration noise. | Use Scenario: Speed regulation and stall detection in server cooling fans. IC Role / Device Role / Timing Role: Magnetic zero-crossing detector feeding tachometer signal to fan controller MCU. Use Value: Delivers clean, chatter-free pulse output over –20°C to +85°C ambient with integrated reverse-polarity protection on shared 12V rail. |
| Revolution Counting | Speed Measurement |
Use Scenario: Bidirectional rotation counting in industrial conveyors using dual-latch configuration. IC Role / Device Role / Timing Role: Edge-triggered magnetic event counter input to microcontroller timer capture unit. Use Value: Provides deterministic ON/OFF transitions with sub-microsecond rise/fall times (<1.5µs) for accurate RPM calculation at >20k RPM. | Use Scenario: Real-time rotational speed feedback in automotive radiator fans. IC Role / Device Role / Timing Role: Pulse generator synchronized to magnet pole passage for closed-loop speed control. Use Value: Maintains timing accuracy across –40°C to +125°C via temperature-compensated Bop/Brp, supporting ASIL-B functional safety monitoring paths. |
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 (120G typ), wider temp range (–40°C to +150°C), SOIC-8 package | Requires PCB redesign for surface-mount footprint; better suited for high-temp engine bay use | Select when higher magnetic sensitivity or extended junction temperature margin is required |
| Melexis US1881EUA-ABA-001-SP | Lower supply range (2.7–24V), 40mA sink, TO-92 package, no reverse polarity protection | Needs external reverse-protection diode; preferred where higher output drive or legacy through-hole compatibility is critical | Select when 40mA sink current or TO-92 mounting is mandatory; verify external protection implementation |
Compared with A3291LUA-T and US1881EUA-ABA-001-SP, the ATS177-PG-B-A offers optimal balance of SIP-3L through-hole manufacturability, integrated reverse protection, and cost-effective 25mA drive for mainstream BLDC fan and motor applications.
Availability
ATS177-PG-B-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 industrial and automotive production cycles.
Supply support for ATS177-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, headquartered in Plano, Texas, with design and manufacturing operations across Asia and the Americas.
The ATS177 belongs to Diodes' Hall-effect sensor product line, engineered specifically for robust, cost-sensitive rotor position sensing in brushless DC motors and fans used in consumer, industrial, and automotive systems.
FAQ
What is the magnetic polarity requirement for ATS177-PG-B-A operation?
The ATS177-PG-B-A is a bipolar latch: it turns ON when a south pole approaches the branded side (Bop ≥ +5 to +100 Gauss), and remains ON until a north pole of sufficient strength (Brp ≤ –5 to –100 Gauss) causes release. Polarity reversal is mandatory for state change - unipolar fields will not reset the output.
Can ATS177-PG-B-A drive a MOSFET gate directly?
Yes - its 25mA open-collector sink current and ≤700mV saturation voltage at 20mA allow direct driving of low-threshold N-channel MOSFET gates (e.g., Si2302, DMN2004) when paired with a 10kΩ pull-up to Vcc. For high-side or fast-switching applications, a dedicated pre-driver stage is recommended.
Does ATS177-PG-B-A require an external pull-up resistor?
Yes - the DO pin is open-collector and requires an external pull-up resistor to define the logic HIGH voltage level and set rise time. Typical values range from 2.2kΩ (for 5V logic) to 10kΩ (for 12V/24V systems); value selection balances speed, power, and noise immunity per application.
How does temperature affect the magnetic switching points of ATS177-PG-B-A?
ATS177-PG-B-A incorporates a temperature-compensated bandgap regulator, resulting in minimal drift: Bop and Brp shift less than ±0.1% per °C over –40°C to +125°C. The datasheet shows Bop decreases slightly with rising temperature while Brp increases, maintaining hysteresis stability for reliable commutation across full operating range.
ATS177-PG-B-A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 3-SIP
- 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:
- 3.5V ~ 20V
- Current - Supply (Max):
- 10mA
- Current - Output (Max):
- 25mA
- Output Type:
- Open Collector
- Features:
- Temperature Compensated
- Operating Temperature:
- -20°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 3-SIP
ATS177-PG-B-A FAQ
1.How can I place an order for ATS177-PG-B-A through Aetrix?
Please submit a Request for Quotation (RFQ) for ATS177-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 ATS177-PG-B-A reliable?
The price and inventory of ATS177-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 ATS177-PG-B-A is usually 5 days.
3.What payment methods are accepted for ATS177-PG-B-A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ATS177-PG-B-A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ATS177-PG-B-A?
ATS177-PG-B-A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ATS177-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 ATS177-PG-B-A?
For technical support, including ATS177-PG-B-A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ATS177-PG-B-A requirements.
6.How does Aetrix verify that ATS177-PG-B-A is sourced from the original manufacturer or authorized distributors?
All ATS177-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 ATS177-PG-B-A meets industry standards.
7.What is the process for return or replacement of ATS177-PG-B-A?
All ATS177-PG-B-A units undergo pre-shipment inspection (PSI). If there is an issue with ATS177-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 ATS177-PG-B-A part is unused and in its original packaging.
Return procedure for ATS177-PG-B-A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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