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Diodes Incorporated AP1346SL-13
- Part No.:
- AP1346SL-13
- Manufacturer:
- Diodes Incorporated
- Category:
- Motor Drivers, Controllers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AP1346SL-13.pdf
- Description:
- IC MOTOR DRIVER 4V-28V 8SOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,538
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Product details
Overview
AP1346SL-13 from Anachip Corp. is a two-coil brushless DC fan motor predriver IC with integrated Hall sensor interface, FG speed-indication output, 70mA driver outputs, thermal shutdown, and lock-detection with automatic restart - designed for high-voltage (4–28V) fan control in server cooling systems.
For engineers reviewing the AP1346SL-13 datasheet, AP1346SL-13 pinout, AP1346SL-13 application, or AP1346SL-13 equivalent, key selection criteria include Hall-compatible input hysteresis (±3–15 mV), CT-timed oscillator stability, FG open-drain sink capability (8 mA), SOP-8L thermal derating curve, and dual-output phase control for two-coil BLDC fans.
Technical Context
The AP1346SL-13 implements a Hall-effect-based commutation controller with dedicated HS(+) and HS(−) differential inputs, internal regulator, and dual high-current driver stages (OUT1/OUT2). It uses an external timing capacitor (CT) to set oscillation frequency for motor timing.
Its lock detection logic monitors FG/RD output behavior and disables outputs upon stall; removal of lock triggers autonomous restart without external reset. The FG pin serves as a pulse train proportional to motor RPM, while RD (on AP1347 variant) provides status flag - AP1346SL-13 implements FG-only mode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 4 V to 28 V - supports wide-input 12 V/24 V DC fan rails without external regulation |
| Output Current | 70 mA max per OUT1/OUT2 - drives gate resistors or low-side MOSFETs directly in two-coil configurations |
| FG Sink Current | 8 mA at VFGL ≤ 0.5 V - ensures robust TTL/CMOS-compatible tachometer signal under load |
| Hall Hysteresis | ±3 mV to ±15 mV - rejects noise on Hall sensor signals in electrically noisy fan environments |
| Operating Temp | −30°C to +85°C - validated for industrial-grade server and telecom chassis thermal profiles |
| Thermal Shutdown | Integrated - disables outputs above junction temperature threshold to prevent latch-up during overload |
| CT Timing Range | Charge/discharge ratio 32–48 - enables precise tuning of motor commutation frequency via external capacitor |
Pinout & Package
SOP-8L (Small Outline Package, 8-pin, lead-free, 1.27 mm pitch), body dimensions 5.05 × 3.90 × 1.45 mm (D × E × A2), rated for 550 mW at 25°C with linear derating (−5.5 mW/°C above 25°C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Power supply input | Accepts 4–28 V; powers internal regulator, Hall amp, and drivers |
| GND | Ground reference | Common return for power, Hall inputs, and FG/RD output |
| HS(+) | Positive Hall sensor input | Differential input paired with HS(−); accepts AC+DC Hall voltage up to VCC−0.5 V |
| HS(−) | Negative Hall sensor input | Differential complement to HS(+); enables noise-immune rotor position sensing |
| FG/RD | Speed indicator / status output | Open-drain FG output (AP1346); sinks 8 mA; pulses per revolution for RPM monitoring |
| CT | Oscillator timing node | Connects external capacitor to set commutation frequency; charge/discharge current ratio defines timing accuracy |
| OUT1 | Driver output 1 | 70 mA capable; drives one coil leg or external N-MOSFET gate in two-phase drive |
| OUT2 | Driver output 2 | 70 mA capable; complements OUT1 for alternating coil excitation in BLDC sequence |
Key Features
| Feature | Design Value |
|---|---|
| Lock shutdown + auto-restart | Prevents thermal runaway during fan stall and restores operation automatically when rotation resumes |
| Integrated Hall amplifier | Supports standard 3-wire Hall sensors with programmable hysteresis (±3–15 mV) for reliable edge detection |
| FG tachometer output | Open-drain, 8 mA sink capacity - interfaces directly with microcontroller GPIO or dedicated fan monitor ICs |
| Thermal protection | Internal junction-sensing circuit disables outputs before damage occurs under sustained overload or poor heatsinking |
| CT-based timing | External capacitor sets commutation period; stable over voltage/temperature with 32–48 charge/discharge ratio |
Applications
| Server Rack Cooling | Industrial Enclosure Fans |
|---|---|
Use Scenario: High-airflow 24 V BLDC fans in 1U/2U server chassis with forced convection requirements. IC Role / Device Role / Timing Role: Fan motor predriver providing Hall-commutated two-phase drive and real-time RPM feedback via FG output. Use Value: Enables closed-loop thermal management using FG pulses, while lock protection prevents system overheating during dust-clogged operation. | Use Scenario: Continuous-duty fans in factory automation control cabinets exposed to ambient temperatures up to 75°C. IC Role / Device Role / Timing Role: Motor controller interfacing with off-the-shelf Hall-effect sensors to drive dual-coil fans without external logic. Use Value: Eliminates need for discrete comparators and gate drivers; SOP-8L package allows compact PCB layout in space-constrained enclosures. |
| Telecom Base Station Fans | Medical Imaging Equipment Cooling |
Use Scenario: Redundant 48 V-derived 24 V fans in outdoor telecom shelters with wide temperature cycling (−25°C to +70°C). IC Role / Device Role / Timing Role: Pre-driver managing commutation timing and fault response for reliability-critical airflow systems. Use Value: Thermal shutdown and auto-restart ensure uninterrupted cooling during transient overloads or bearing wear events. | Use Scenario: Low-noise, high-reliability fans in MRI or CT scanner gantries where fan failure risks diagnostic downtime. IC Role / Device Role / Timing Role: Hall-synchronized motor controller delivering precise speed control and stall detection for safety-critical cooling. Use Value: FG output feeds into watchdog circuitry; lock detection triggers system alert before thermal limits are breached. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar two-coil BLDC fan predriver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ALLEGRO A3977SLBTR-T | Microstepping stepper driver; no Hall interface; requires external logic for BLDC commutation | Designed for bipolar stepper motors, not optimized for FG-based fan speed feedback | Only suitable if redesigning fan control architecture to use step/direction interface |
| ON Semiconductor NCP1701ADR2G | Single-channel fan controller; lacks dual outputs and lock-detection logic | Supports only single-coil or PWM-driven fans; no FG/RD functionality | Applicable only for simpler, lower-cost single-phase fan designs without stall recovery |
Compared with A3977SLBTR-T and NCP1701ADR2G, AP1346SL-13 uniquely integrates Hall-compatibility, dual 70 mA drivers, FG tach output, and autonomous lock-recovery - making it the only drop-in solution for legacy two-coil BLDC fan modules requiring minimal BOM change.
Availability
AP1346SL-13 is available at Aetrix Electronics and suitable for server rack cooling, industrial enclosure fans, and telecom base station fans requiring stable component supply and long-lifecycle support.
Supply support for AP1346SL-13 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
Anachip Corp. is a Taiwan-based fabless semiconductor company specializing in analog and mixed-signal ICs for power management and motor control since 2000.
The AP1346/1347 product line targets cost-sensitive, high-volume BLDC fan applications in computing and industrial equipment - emphasizing integration, thermal resilience, and Hall-sensor interoperability.
FAQ
What is the function of the CT pin on AP1346SL-13?
The CT pin connects to an external timing capacitor that sets the oscillator frequency for motor commutation. Its charge/discharge current ratio (32–48) determines timing accuracy, enabling precise RPM control across voltage and temperature variations without trimming.
Can AP1346SL-13 drive MOSFETs directly?
Yes - each output (OUT1/OUT2) delivers up to 70 mA, sufficient to drive the gate of small-to-medium power N-channel MOSFETs (e.g., 2N7002, DMN2004) used in low-side switching configurations for two-coil BLDC fans.
Is AP1346SL-13 compatible with both unipolar and bipolar Hall sensors?
It is optimized for standard 3-wire bipolar Hall-effect sensors. The differential HS(+)/HS(−) inputs accept AC+DC signals up to VCC−0.5 V, and built-in hysteresis (±3–15 mV) ensures reliable switching with typical bipolar Hall outputs.
Does AP1346SL-13 support PWM speed control?
No - speed is controlled by varying the supply voltage (4–28 V) or adjusting the CT capacitor value. The IC does not accept external PWM input; FG output reflects actual rotational speed, not commanded speed.
AP1346SL-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Motor Type - Stepper:
- -
- Motor Type - AC, DC:
- Brushless DC (BLDC)
- Function:
- Controller - Commutation, Direction Management
- Output Configuration:
- Pre-Driver - Low Side (2)
- Interface:
- On/Off
- Technology:
- -
- Step Resolution:
- -
- Applications:
- Fan Controller
- Current - Output:
- 70mA
- Voltage - Supply:
- 4V ~ 28V
- Voltage - Load:
- -
- Operating Temperature:
- -30°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOP
AP1346SL-13 FAQ
1.How can I place an order for AP1346SL-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP1346SL-13 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 AP1346SL-13 reliable?
The price and inventory of AP1346SL-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP1346SL-13 is usually 5 days.
3.What payment methods are accepted for AP1346SL-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP1346SL-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP1346SL-13?
AP1346SL-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP1346SL-13 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 AP1346SL-13?
For technical support, including AP1346SL-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP1346SL-13 requirements.
6.How does Aetrix verify that AP1346SL-13 is sourced from the original manufacturer or authorized distributors?
All AP1346SL-13 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 AP1346SL-13 meets industry standards.
7.What is the process for return or replacement of AP1346SL-13?
All AP1346SL-13 units undergo pre-shipment inspection (PSI). If there is an issue with AP1346SL-13, 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 AP1346SL-13 part is unused and in its original packaging.
Return procedure for AP1346SL-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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