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Diodes Incorporated AM4967GSTR-G1
- Part No.:
- AM4967GSTR-G1
- Manufacturer:
- Diodes Incorporated
- Category:
- Motor Drivers, Controllers
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
AM4967GSTR-G1.pdf
- Description:
- IC MOTOR DRIVER 5.5V-16V 16SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,850
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Product details
Overview
AM4967GSTR-G1 from Diodes Incorporated is an adjustable-speed, single-phase full-wave motor pre-driver IC designed for brushless DC fan motors. It delivers bipolar-process-based P/N-channel gate drive outputs (OUT1/OUT1B and OUT2/OUT2B), supports external PWM speed control (20–100 kHz), features linear start (via LS pin), minimum speed setting (VMIN), lock protection (CT), and rotation detection (FG/RD). It operates from 5.5 V to 16 V and targets high-current, high-voltage CPU/OA cooler applications.
For engineers reviewing the AM4967GSTR-G1 datasheet, AM4967GSTR-G1 pinout, AM4967GSTR-G1 application, or AM4967GSTR-G1 equivalent, key selection criteria include its SSOP-16 package compatibility, dual-channel open-drain/push-pull output architecture, 30 kHz internal oscillator (COSC), 5 V reference (VREF), and integrated overtemperature and current-limit protection.
Technical Context
The AM4967 implements a Hall-effect commutated, full-wave pre-driver topology with two independent half-bridge driver channels. Each channel combines an open-drain P-type output (e.g., OUT1) and a push-pull N-type output (e.g., OUT1B), enabling bidirectional coil current control for single-phase BLDC motors.
Speed regulation uses analog comparison between VPWM (0–5 V input) and the COSC ramp (1.0–3.0 V, 30 kHz), generating variable-duty drive signals. Linear start is implemented via controlled voltage ramp on LS pin using an external 0.47–1 µF capacitor, while lock protection relies on CT pin timing (0.47 µF sets start/lock delay).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 5.5 V to 16 V - Supports 12 V fan systems with margin for transient spikes and brown-out resilience. |
| Output Drive Type | Dual-channel: P-type open-drain + N-type push-pull - Enables flexible external MOSFET pairing for full-wave coil excitation. |
| COSC Frequency | 30 kHz (typ.) with 220 pF - Sets base PWM carrier frequency for smooth speed control and EMI management. |
| VREF Output | 5.0 V ±0.5 V at 5 mA - Provides stable bias/reference for VMIN, LS, and external circuitry calibration. |
| Current Limit Threshold | 200 mV (typ.) on CS pin - Enables precise, resistor-set overcurrent shutdown (e.g., 100 mΩ = 2 A limit). |
| FG/RD Output Function | Selectable tachometer (FG) or rotation-detection (RD) - Delivers pulse-per-revolution or logic-level stop-signal for system monitoring. |
| Operating Temperature | −30 °C to +105 °C - Qualified for industrial and automotive-adjacent cooling environments. |
Pinout & Package
AM4967GSTR-G1 is housed in a 16-pin SSOP (Shrink Small Outline Package) with 0.635 mm pitch, optimized for thermal dissipation and board space efficiency in fan control modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 16 (OUT2, OUT1) | P-type driver output | Open-drain outputs requiring external pull-up resistors to VCC or higher rail for high-side switching. |
| 2, 15 (OUT2B, OUT1B) | N-type driver output | Push-pull outputs capable of sinking up to 20 mA - directly drive low-side MOSFET gates or logic inputs. |
| 3 (VCC) | Main power supply | Primary 5.5–16 V supply for internal logic, drivers, and reference circuits. |
| 4 (CS) | Current sense input | Monitors external shunt voltage; shutdown triggered if >200 mV - enables programmable overcurrent protection. |
| 5 (VMIN) | Minimum speed setpoint | Analog input (0–5 V) defining lowest operational speed; tied to VREF to disable minimum speed hold. |
| 6 (VPWM) | Speed control input | Accepts 0–5 V DC or filtered PWM (20–100 kHz); lower voltage = higher duty = faster rotation. |
| 7 (COSC) | Oscillator timing node | Connects to 220 pF capacitor to generate 30 kHz internal clock for PWM generation and timing functions. |
| 8 (FG/RD) | Rotation status output | Configurable open-drain output: FG = tach pulses (1 per revolution), RD = logic-low when stalled. |
| 9, 10 (HIN−, HIN+) | Hall sensor differential input | Receives Hall-effect position signal; ±10 mV sensitivity enables robust commutation under noise. |
| 11 (CT) | Lock/start timing | Connects to 0.47 µF capacitor to set auto-start delay and lock-protection timeout (~1.2 s typical). |
| 12 (LS) | Linear start control | Charged from VREF via external capacitor (0.47–1 µF) to ramp drive voltage and suppress inrush current. |
| 13 (VREF) | Internal reference output | Stable 5 V source used for VMIN, LS, and external biasing - load-limited to 20 mA. |
| 14 (GND) | Signal ground | Common return for all analog and digital circuitry - must be low-impedance and separated from power ground where possible. |
Key Features
| Feature | Design Value |
|---|---|
| Linear Start Function | Reduces turn-on current surge by ramping drive voltage via LS pin capacitor - prevents mechanical shock and audible noise in fans. |
| External PWM Speed Control | Supports 20–100 kHz PWM input on VPWM pin with internal low-pass filtering - enables precise, microcontroller-driven speed regulation. |
| Minimum Rotation Speed Setting | VMIN pin accepts 0–5 V analog input to define lowest stable RPM - avoids stall at low duty cycles in temperature-controlled systems. |
| Lock Protection & Auto Restart | CT pin capacitor sets lock-detection window (~1.2 s); automatic recovery occurs after fault clearance without host intervention. |
| Rotation Status Feedback | FG/RD pin provides selectable tachometer pulses or binary rotation-detect signal - simplifies closed-loop speed monitoring and failure reporting. |
Applications
| CPU Cooler Fan Control | Office Automation Fan Module |
|---|---|
|
Use Scenario: Thermal management in high-performance desktop/server CPUs where dynamic fan speed adjusts to die temperature. IC Role / Device Role / Timing Role: Pre-driver IC providing Hall-commutated full-wave drive to external MOSFETs controlling 12 V BLDC fan coils. Use Value: Enables quiet, efficient operation across 0–100% speed range with linear start, overtemperature shutdown, and FG feedback for BIOS integration. |
Use Scenario: Intelligent cooling in laser printers, copiers, and multifunction devices requiring reliable, long-life fan operation. IC Role / Device Role / Timing Role: Motor pre-driver managing single-phase BLDC fan commutation, speed regulation, and stall detection in embedded controller subsystems. Use Value: Reduces system-level component count with integrated VREF, COSC oscillator, and lock/auto-restart - improves BOM cost and field reliability. |
| Industrial Enclosure Ventilation | Automotive Cabin Air System |
|
Use Scenario: Forced-air cooling for PLCs, HMIs, and power supplies operating in extended temperature environments (−30 °C to +105 °C). IC Role / Device Role / Timing Role: High-voltage pre-driver supporting 16 V supply rails and delivering robust gate drive under wide ambient conditions. Use Value: Maintains stable operation during voltage transients and thermal cycling - validated for industrial-grade longevity and EMC resilience. |
Use Scenario: Auxiliary blower control in HVAC modules for passenger compartment air circulation, meeting AEC-Q200 stress requirements. IC Role / Device Role / Timing Role: Motor interface IC enabling PWM-based speed modulation, rotation monitoring (FG), and fault-safe shutdown (RD) in automotive subsystems. Use Value: Supports functional safety-aware designs with overtemperature protection, current limiting, and diagnostic-ready outputs - aligns with ASIL-B support paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar single-phase BLDC pre-driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ALLEGRO A4964KLPTR-T | Integrated 3-phase pre-driver with built-in charge pump; requires no external VCC bootstrap components. | Targets 3-phase motors only; not pin-compatible and lacks VMIN/LS/CT functions for single-phase linear start. | Choose A4964 for 3-phase fans; avoid for AM4967's single-phase, SSOP-16 footprint, or linear-start-critical designs. |
| TI DRV10970PWPR | Monolithic 3-phase BLDC driver with integrated MOSFETs (30 V, 1 A); no external FET requirement. | Not a pre-driver - eliminates need for external power stage but limits max voltage/current and thermal design flexibility. | Choose DRV10970 for compact, low-power 3-phase fans; retain AM4967 for high-voltage (>16 V), high-current, or discrete-FET designs. |
Compared with A4964KLPTR-T and DRV10970PWPR, AM4967GSTR-G1 uniquely balances single-phase pre-drive capability, SSOP-16 compactness, analog speed/minimum-speed control, and discrete power-stage flexibility - making it optimal for cost-sensitive, thermally demanding 12–16 V fan systems requiring field-serviceable MOSFETs.
Availability
AM4967GSTR-G1 is available at Aetrix Electronics and suitable for CPU cooler fan control, office automation ventilation, industrial enclosure cooling, and automotive cabin air systems requiring stable component supply, RoHS-compliant green packaging, and IATF 16949-aligned manufacturing traceability.
Supply support for AM4967GSTR-G1 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 semiconductor company specializing in discrete, analog, and mixed-signal solutions, with design, manufacturing, and distribution operations across Asia, the Americas, and Europe.
AM4967 belongs to Diodes' motor control pre-driver product line, engineered specifically for high-efficiency, low-noise, single-phase BLDC fan applications in computing, industrial, and automotive-adjacent thermal management systems.
FAQ
What is the function of the CT pin, and how does it affect motor startup?
The CT pin sets the lock-protection timeout and auto-start delay via an external 0.47 µF capacitor. When the motor fails to rotate within ~1.2 seconds, the IC triggers lock protection and shuts down outputs. After fault clearance, it automatically restarts. This prevents damage from stalled rotors and eliminates need for host MCU intervention during startup sequences.
Can AM4967GSTR-G1 drive MOSFETs directly, or does it require gate drivers?
AM4967GSTR-G1 drives external N-channel MOSFETs directly via its push-pull OUT1B/OUT2B outputs (20 mA sink/source), but requires external pull-up resistors for its open-drain P-channel outputs (OUT1/OUT2). It is not a gate driver IC - it is a pre-driver that interfaces with discrete power FETs, not logic-level MOSFETs or integrated power stages.
How does the linear start (LS) function reduce inrush current?
The LS pin connects externally to VREF through a 0.47–1 µF capacitor, creating a controlled voltage ramp. This ramp delays and smooths the activation of the driver outputs, preventing abrupt coil energization. As a result, peak startup current drops significantly - critical for extending fan bearing life and reducing audible click/noise during power-on.
Is AM4967GSTR-G1 qualified for automotive use under AEC-Q100?
No - AM4967GSTR-G1 is not AEC-Q100 qualified. While it operates from −30 °C to +105 °C and is manufactured in IATF 16949-certified facilities, Diodes explicitly states that automotive-qualified versions (e.g., with AEC-Q100 change control and PPAP capability) require direct engagement with their automotive team. This part is intended for industrial and commercial thermal management.
AM4967GSTR-G1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 16-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Motor Type - Stepper:
- -
- Motor Type - AC, DC:
- Brushless DC (BLDC)
- Function:
- Controller - Commutation, Direction Management
- Output Configuration:
- Pre-Driver - Half Bridge (2)
- Interface:
- PWM
- Technology:
- -
- Step Resolution:
- -
- Applications:
- General Purpose
- Current - Output:
- -
- Voltage - Supply:
- 5.5V ~ 16V
- Voltage - Load:
- -
- Operating Temperature:
- -30°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SSOP
AM4967GSTR-G1 FAQ
1.How can I place an order for AM4967GSTR-G1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AM4967GSTR-G1 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 AM4967GSTR-G1 reliable?
The price and inventory of AM4967GSTR-G1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AM4967GSTR-G1 is usually 5 days.
3.What payment methods are accepted for AM4967GSTR-G1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AM4967GSTR-G1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AM4967GSTR-G1?
AM4967GSTR-G1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AM4967GSTR-G1 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 AM4967GSTR-G1?
For technical support, including AM4967GSTR-G1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AM4967GSTR-G1 requirements.
6.How does Aetrix verify that AM4967GSTR-G1 is sourced from the original manufacturer or authorized distributors?
All AM4967GSTR-G1 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 AM4967GSTR-G1 meets industry standards.
7.What is the process for return or replacement of AM4967GSTR-G1?
All AM4967GSTR-G1 units undergo pre-shipment inspection (PSI). If there is an issue with AM4967GSTR-G1, 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 AM4967GSTR-G1 part is unused and in its original packaging.
Return procedure for AM4967GSTR-G1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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