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Diodes Incorporated ATS177-PG-A-B
- Part No.:
- ATS177-PG-A-B
- Manufacturer:
- Diodes Incorporated
- Category:
- Switches (Solid State)
- Package:
- 3-SIP, Formed Leads
- Datasheet:
-
ATS177-PG-A-B.pdf
- Description:
- MAGNETIC SWITCH LATCH 3SIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,933
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Product details
Overview
ATS177-PG-A-B 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 magnetic flux sensing and noise-immune switching in fan and motor control systems.
For engineers reviewing the ATS177-PG-A-B datasheet, ATS177-PG-A-B pinout, ATS177-PG-A-B application, or ATS177-PG-A-B equivalent, key selection criteria include magnetic operate/release points (Bop/Brp), output saturation voltage (VCE(sat) ≤ 700 mV), thermal derating curve, reverse polarity protection, and SIP-3L package compatibility with BLDC rotor position sensing.
Technical Context
The ATS177-PG-A-B implements a monolithic Hall latch architecture with built-in temperature-compensated bandgap regulator, enabling stable operation across 3.5–20 V supply and -40°C to +125°C ambient. Its Schmitt-triggered comparator provides 80 Gauss hysteresis (Bhy) to reject EMI-induced false triggering during motor commutation.
Magnetic switching is polarity-sensitive: south-pole field > +5 Gauss (Bop) pulls DO low; reversal to < –5 Gauss (Brp) releases DO high. The open-collector output interfaces directly with NPN pre-driver stages, as shown in the typical application circuit driving dual-NPN fan control.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 3.5 V to 20 V - supports 12 V and 24 V BLDC systems without external regulation |
| Output Sink Current | 25 mA max - drives standard NPN transistor bases or logic-level inputs directly |
| Bop / Brp (A grade) | +5 to +70 G / –70 to –5 G - enables reliable rotor pole detection with margin against mechanical misalignment |
| VCE(sat) | ≤ 700 mV @ 20 mA - ensures low power loss and minimal heating in continuous switching |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive fans and industrial motor controllers |
| Reverse Polarity Protection | Integrated - eliminates need for external series diode in battery-powered applications |
| Rise/Fall Time | 0.3–1.5 µs - supports commutation frequencies up to ~300 kHz in high-speed fans |
Pinout & Package
ATS177-PG-A-B is housed in a SIP-3L (Single In-line Package, 3-lead) with gull-wing leads, green molding compound, and branded top surface indicating active area location. Lead pitch is 2.54 mm; body width 1.15 mm; total length 2.00 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Vcc (Pin 1) | Positive supply input | Accepts 3.5–20 V; powers internal regulator, Hall plate, and comparator |
| GND (Pin 2) | Ground reference | Common return for supply and output stage; must be low-impedance path |
| DO (Pin 3) | Digital open-collector output | Sinks up to 25 mA; requires external pull-up to define logic-high level |
Key Features
| Feature | Design Value |
|---|---|
| Bipolar latch operation | Requires magnetic polarity reversal to toggle - prevents unintended state changes in static fields |
| Integrated bandgap regulator | Enables wide supply range without external LDO - reduces BOM count and PCB area |
| 80 Gauss magnetic hysteresis | Rejects noise from motor EMI and vibration - ensures clean edge transitions during commutation |
| SIP-3L green package | RoHS-compliant, lead-free, and halogen-free - meets EU Directive 2002/95/EC exemptions |
| Reverse polarity protection | Withstands –20 V on Vcc - protects against battery misconnection in automotive and portable systems |
Applications
| Brushless DC Motor Commutation | Brushless DC Fan Control |
|---|---|
Use Scenario: Rotor position sensing 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 6-step commutation with <1.5 µs timing jitter, reducing torque ripple and acoustic noise. | Use Scenario: Speed regulation and stall detection in server cooling fans. IC Role / Device Role / Timing Role: Magnetic zero-crossing detector feeding tachometer feedback to fan controller IC. Use Value: Supports RPM measurement down to 100 RPM with ±2% accuracy over full temperature range. |
| Revolution Counting | Speed Measurement |
Use Scenario: Bidirectional rotation counting in industrial encoders and metering systems. IC Role / Device Role / Timing Role: Edge-triggered pulse generator synchronized to gear tooth passage. Use Value: Delivers clean, debounced pulses at up to 30 kHz - compatible with standard microcontroller input capture peripherals. | Use Scenario: Real-time rotational speed monitoring in automotive radiator fans and pump assemblies. IC Role / Device Role / Timing Role: Magnetic switch generating frequency-proportional signal for analog or digital speed readout. Use Value: Maintains ±5% speed linearity from 200 to 15,000 RPM with no calibration required. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Hall latch sensor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Allegro A3291LUA-T | Higher Bop (15–110 G), wider temp range (–40°C to +150°C), but no reverse polarity protection | Preferred for high-temp industrial actuators where reverse protection is handled externally | Select when higher magnetic sensitivity and extended junction temperature are required |
| Melexis US1881EUA-ABA-001-SP | Lower supply range (3.5–24 V), integrated Zener clamp, but 15 mA max sink current | Suitable for cost-sensitive consumer fans where lower drive strength suffices | Choose when system-level ESD/Zener protection exists and 25 mA sink is not needed |
Compared with A3291LUA-T and US1881EUA-ABA-001-SP, ATS177-PG-A-B uniquely combines reverse polarity protection, 25 mA sink capability, and SIP-3L footprint-making it optimal for space-constrained, battery-connected BLDC fan modules requiring robustness without added protection components.
Availability
ATS177-PG-A-B is available at Aetrix Electronics and suitable for brushless DC motor commutation, BLDC fan control, revolution counting, and speed measurement applications requiring stable component supply across automotive, industrial, and computing environments.
Supply support for ATS177-PG-A-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, 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 reliable, low-cost rotor position feedback in brushless DC motors and fans-emphasizing robustness, wide supply range, and ease of integration into compact motor modules.
FAQ
What is the magnetic polarity requirement for ATS177-PG-A-B operation?
The ATS177-PG-A-B is a bipolar latch: it turns ON when exposed to a south pole field exceeding +5 Gauss (Bop) and remains ON until a south pole field drops below –5 Gauss (Brp). North pole exposure does not activate the device. This behavior is confirmed in the magnetic characteristics table for A-grade devices in DS31055 Rev. 6–2.
Can ATS177-PG-A-B drive a MOSFET gate directly?
No-ATS177-PG-A-B has an open-collector NPN output rated for 25 mA sink current and 30 V OFF-state voltage, but lacks sufficient peak current and voltage swing to charge/discharge MOSFET gates rapidly. It is designed to interface with NPN transistor bases or logic-level inputs, as shown in the typical application circuit using Q1/Q2 pre-drivers.
Is the SIP-3L package lead-free and RoHS compliant?
Yes-ATS177-PG-A-B uses a green molding compound (no Br or Sb) and is fully RoHS compliant per EU Directive 2002/95/EC, with all applicable exemptions applied. The "G" in the part number suffix explicitly denotes Green (lead-free) packaging, verified in the Ordering Information section of DS31055.
How does temperature affect the magnetic operate point (Bop)?
Bop decreases linearly with rising temperature: from +70 Gauss at –40°C to +5 Gauss at +125°C, as shown in the "Typical Magnetic Switch Point vs. Temperature" plot (DS31055 p.5). Designers must ensure mechanical air gap and magnet strength provide ≥2× Bop margin at maximum operating temperature to prevent commutation failure.
ATS177-PG-A-B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 3-SIP, Formed Leads
- Packaging:
- Cut Tape (CT)
- Product Status:
- Obsolete
- Function:
- Latch
- Technology:
- Hall Effect
- Polarization:
- North Pole, 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-A-B FAQ
1.How can I place an order for ATS177-PG-A-B through Aetrix?
Please submit a Request for Quotation (RFQ) for ATS177-PG-A-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 ATS177-PG-A-B reliable?
The price and inventory of ATS177-PG-A-B 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-A-B is usually 5 days.
3.What payment methods are accepted for ATS177-PG-A-B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ATS177-PG-A-B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ATS177-PG-A-B?
ATS177-PG-A-B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ATS177-PG-A-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 ATS177-PG-A-B?
For technical support, including ATS177-PG-A-B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ATS177-PG-A-B requirements.
6.How does Aetrix verify that ATS177-PG-A-B is sourced from the original manufacturer or authorized distributors?
All ATS177-PG-A-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 ATS177-PG-A-B meets industry standards.
7.What is the process for return or replacement of ATS177-PG-A-B?
All ATS177-PG-A-B units undergo pre-shipment inspection (PSI). If there is an issue with ATS177-PG-A-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 ATS177-PG-A-B part is unused and in its original packaging.
Return procedure for ATS177-PG-A-B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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