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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Motor Drivers, Controllers

Diodes Incorporated AM9468-T16-13

Name: AM9468-T16-13
Brand: Diodes Incorporated
SKU: AM9468-T16-13
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AM9468-T16-13

Manufacturer:: Diodes Incorporated

Category:: Motor Drivers, Controllers

Package:: 16-TSSOP (0.173", 4.40mm Width)

Datasheet:: AM9468-T16-13.pdf

Description:: IC MOTOR DRIVER 2.4V-18V 16TSSOP

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Product details

Overview

AM9468-T16-13 from Diodes Incorporated is a single-phase full-wave BLDC fan/motor driver IC with BTL linear output architecture, 2.4–18V operating range, integrated Hall bias (1.25V), and dual speed control modes (external PWM or DC voltage via VCONT/RMI). It delivers up to 500mA continuous output current, features rotor lock protection with automatic restart, overvoltage shutdown (20.5V typ), and thermal shutdown (+175°C). Used in CPU cooling fans for notebooks and desktops.

For engineers reviewing the AM9468-T16-13 datasheet, AM9468-T16-13 pinout, AM9468-T16-13 application, or AM9468-T16-13 equivalent, key selection considerations include its low-noise BTL drive topology, FG tachometer and RD lock-detect open-drain outputs, current limit set by RF resistor (250mV threshold), and TSSOP-16 package compatibility with medium-voltage BLDC motor control.

Technical Context

The AM9468 implements a Hall-sensor-based commutation controller with internal triangular waveform generation on CPWM (36kHz typical with 100pF), comparing VCONT against this ramp for DC-speed control or directly accepting external PWM (8–100kHz) on the PWM pin. Its BTL amplifier gain is 49dB, minimizing audible noise and EMI.

It integrates dual protection mechanisms: rotor lock detection triggers tLCK_DET_ON (0.5s typ) followed by tOFF (4.5s typ) before auto-restart, while overvoltage shutdown activates at 20.5V and releases at 19.5V. Thermal shutdown engages at +175°C with +25°C hysteresis.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage Range	2.4V to 18V - supports standard 9V/12V/15V BLDC fan rails without external regulation
Continuous Output Current	500mA - sufficient for medium-power cooling fans and instrumentation motors
Current Limit Threshold	250mV at RF pin - sets 250mA current limit with 1Ω resistor; scalable via RF value
FG Output Type	Open-drain frequency generator - provides magnetic-change-based tachometer signal requiring external pull-up
Hall Bias Voltage	1.25V ±0.05V - stable reference for unbuffered differential Hall sensors
Overvoltage Shutdown	20.5V typical - protects motor coil during supply transients; releases at 19.5V
Thermal Shutdown	+175°C junction temperature - prevents permanent damage under sustained overload

Pinout & Package

AM9468-T16-13 is housed in a power-optimized, low-profile TSSOP-16 package with exposed thermal pad (per JESD51-7 layout), rated for 1610mW dissipation on 4-layer PCB.

Pin/Terminal	Circuit Role	Design Meaning
OUT1 / OUT2	H-bridge output terminals	Source/sink-capable drive pins connected directly to motor coil; total RDS(ON) defines conduction loss
VDD	Main power supply input	Accepts 2.4–18V; requires local 1µF decoupling capacitor per datasheet layout guidance
GND	Power and signal reference	Common return for all analog/digital circuits; must be low-impedance path to minimize noise coupling
PWM	External speed control input	Directly modulates output duty cycle; accepts 8–100kHz logic-level PWM with defined VIH/VIL thresholds
VCONT / RMI	DC speed & minimum speed inputs	VCONT sets target speed via comparison with CPWM ramp; RMI clamps minimum duty ratio
HIN+ / HIN-	Differential Hall sensor interface	Accepts raw Hall output; enables precise rotor position sensing for commutation timing
FG / RD	Open-drain status outputs	FG reports rotational speed as frequency; RD asserts low during detected rotor lock
RF	Current limit sense input	Resistor-to-GND sets trip point: I_LIM = 0.25V / R_F; enables adjustable overcurrent protection

Key Features

Feature	Design Value
BTL linear driver architecture	Reduces audible switching noise and EMI vs. conventional PWM H-bridge, critical for quiet cooling systems
Integrated Hall bias (1.25V)	Eliminates need for external bias circuitry when using unbuffered Hall sensors, simplifying board design
Auto-restart rotor lock protection	Detects stalled motor, shuts down outputs for 4.5s (typ), then attempts recovery-prevents coil burnout
Dual speed control modes	Supports either external PWM signal or analog DC voltage (VCONT/RMI), enabling flexible system integration
Open-drain FG and RD outputs	Allow level-shifting and wired-OR interfacing with microcontrollers or monitoring ICs using external pull-ups

Applications

CPU Cooling Fans

Instrumentation Cooling Fans

Use Scenario: High-reliability thermal management in space-constrained notebook and desktop motherboards.

IC Role / Device Role / Timing Role: Commutates single-coil BLDC fan based on Hall sensor feedback; regulates speed via PWM or VCONT input.

Use Value: Ultra-low acoustic noise and EMI ensure compliance with acoustic emission standards in consumer computing environments.

Use Scenario: Precision airflow control in medical analyzers, test equipment, and laboratory instruments.

IC Role / Device Role / Timing Role: Drives medium-voltage BLDC cooling fans with tachometer (FG) feedback and lock-detection (RD) for fault logging.

Use Value: Integrated overvoltage (20.5V) and thermal (+175°C) protection ensures uninterrupted operation in sealed enclosures.

9V/12V/15V BLDC Fans

Medium-Voltage Low-Power Motors

Use Scenario: Standardized fan modules used across industrial PCs, network switches, and embedded controllers.

IC Role / Device Role / Timing Role: Provides full-wave drive with BTL architecture, Hall bias, and FG/RD outputs for OEM fan assemblies.

Use Value: TSSOP-16 footprint enables compact, high-density fan driver designs compatible with automated SMT assembly.

Use Scenario: Small-form-factor pumps, actuators, and auxiliary drives in HVAC controls and smart appliances.

IC Role / Device Role / Timing Role: Delivers regulated 500mA continuous drive with programmable current limit (via RF) and thermal safety margin.

Use Value: Dual control modes (PWM/VCONT) allow seamless integration into both microcontroller-based and analog-setpoint systems.

Equivalent & Alternatives

The following parts are listed as comparable options for similar single-phase BLDC motor driver applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
ALLEGRO A4964KLPTR-T	Higher peak current (1.5A), but no integrated Hall bias or FG/RD outputs; requires external bias and tach conditioning	Suited for higher-power fans where discrete Hall biasing is acceptable and tach feedback is handled externally	Select when >500mA continuous drive is required and board space allows added support components
TI DRV10970PWPR	Integrated LDO (3.3V), sensorless commutation only, no Hall inputs; lacks rotor lock detection and RD output	Best for cost-sensitive, lower-noise applications where Hall sensors are omitted and lock detection is not mandatory	Choose for sensorless BLDC control where Hall complexity must be eliminated and thermal protection suffices

Compared with A4964KLPTR-T and DRV10970PWPR, AM9468-T16-13 uniquely combines Hall bias, FG/RD outputs, rotor lock auto-restart, and ultra-low-noise BTL drive in one TSSOP-16 package-making it optimal for certified quiet cooling systems requiring full diagnostic visibility.

Availability

AM9468-T16-13 is available at Aetrix Electronics and suitable for CPU cooling fans, instrumentation cooling fans, and 9V/12V/15V BLDC fan modules requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant green packaging.

Supply support for AM9468-T16-13 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

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability power management, signal integrity, and motor control solutions for industrial and computing markets.

The AM9468 belongs to Diodes' BLDC motor driver product line, engineered specifically for ultra-low-noise, Hall-sensor-based single-coil fan control in thermally sensitive computing and instrumentation applications.

FAQ

What speed control methods does the AM9468-T16-13 support?

The AM9468-T16-13 supports two independent speed control methods: external PWM signal applied to the PWM pin (8–100kHz range), or analog DC voltage applied to the VCONT pin, which is compared against the internal CPWM triangular waveform. The RMI pin sets minimum speed clamp. Both methods are mutually exclusive in a given design and require no firmware intervention.

How does rotor lock protection work on the AM9468-T16-13?

Rotor lock is detected when no FG pulses are received for tLCK_DET_ON (0.5s typical). The device disables OUT1/OUT2, asserts RD low, and enters a 4.5s (tOFF) timeout before attempting automatic restart. If rotation resumes, normal operation resumes; if lock persists, the cycle repeats. This prevents coil overheating without requiring external supervision.

What is the purpose of the RF pin, and how is current limit set?

The RF pin sets the overcurrent protection threshold via an external resistor to GND. The internal comparator trips when voltage across RF exceeds 250mV, limiting output current to I_LIM = 0.25V / R_F. For example, a 1Ω resistor yields a 250mA limit. This allows precise, adjustable current limiting without external sense amplifiers or complex feedback loops.

Can the AM9468-T16-13 drive a motor without a Hall sensor?

No. The AM9468-T16-13 requires a Hall sensor connected to HIN+ and HIN− for rotor position detection and commutation timing. It does not support sensorless operation. The integrated 1.25V Hall bias (HB pin) is designed specifically for powering unbuffered differential Hall elements, confirming its dependency on Hall feedback for core functionality.

AM9468-T16-13 Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: 16-TSSOP (0.173", 4.40mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Motor Type - Stepper:: -

Motor Type - AC, DC:: Brushless DC (BLDC)

Function:: Driver - Fully Integrated, Control and Power Stage

Output Configuration:: Half Bridge (2)

Interface:: PWM

Technology:: Power MOSFET

Step Resolution:: -

Applications:: Fan Motor Driver

Current - Output:: 500mA

Voltage - Supply:: 2.4V ~ 18V

Voltage - Load:: 2.4V ~ 18V

Operating Temperature:: -40°C ~ 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 16-TSSOP

AM9468-T16-13 FAQ

1.How can I place an order for AM9468-T16-13 through Aetrix?

Please submit a Request for Quotation (RFQ) for AM9468-T16-13 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 AM9468-T16-13 reliable?

The price and inventory of AM9468-T16-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AM9468-T16-13 is usually 5 days.

3.What payment methods are accepted for AM9468-T16-13?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AM9468-T16-13 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AM9468-T16-13?

AM9468-T16-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AM9468-T16-13 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 AM9468-T16-13?

For technical support, including AM9468-T16-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AM9468-T16-13 requirements.

6.How does Aetrix verify that AM9468-T16-13 is sourced from the original manufacturer or authorized distributors?

All AM9468-T16-13 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 AM9468-T16-13 meets industry standards.

7.What is the process for return or replacement of AM9468-T16-13?

All AM9468-T16-13 units undergo pre-shipment inspection (PSI). If there is an issue with AM9468-T16-13, 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 AM9468-T16-13 part is unused and in its original packaging.

Return procedure for AM9468-T16-13:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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