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Diodes Incorporated AM4967RGSTR-G1
- Part No.:
- AM4967RGSTR-G1
- Manufacturer:
- Diodes Incorporated
- Category:
- Motor Drivers, Controllers
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
AM4967RGSTR-G1.pdf
- Description:
- IC MOTOR DRIVER 5.5V-16V 16SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,899
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Product details
Overview
AM4967RGSTR-G1 from Diodes Incorporated is an adjustable-speed, single-phase full-wave pre-driver IC for brushless DC motors, implemented in bipolar process. It supports external PWM speed control (20–100 kHz), features linear start, minimum speed setting, lock protection with auto-restart, and rotation speed indication via FG/RD output. Designed for CPU/OA cooler fans requiring high-voltage (up to 16 V) and high-current drive capability.
For engineers reviewing the AM4967RGSTR-G1 datasheet, AM4967RGSTR-G1 pinout, AM4967RGSTR-G1 application, or AM4967RGSTR-G1 equivalent, key selection criteria include its SSOP-16 package compatibility, dual-channel P/N-type driver outputs (OUT1/OUT1B & OUT2/OUT2B), integrated 5 V reference (VREF), current-limit threshold (200 mV), and thermal shutdown behavior under overtemperature conditions.
Technical Context
The AM4967 operates as a Hall-effect commutated motor pre-driver with two independent half-bridge driver channels. Its internal logic interprets differential Hall inputs (HIN+/HIN−) to sequence complementary P/N outputs, while VPWM voltage (0–5 V) sets duty cycle via comparison against COSC's 30 kHz oscillator ramp (CL = 220 pF).
Functional safety features include CT-based lock-detection timing (0.47 μF capacitor), LS-controlled linear startup (0.47–1 μF), and CS-driven current limiting (200 mV threshold). The FG/RD pin provides selectable tachometer or rotation-detection output, configurable via external pull-up and mode selection in application wiring.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 5.5 V to 16 V - Supports 12 V fan systems with margin for transient spikes up to 18 V absolute max. |
| Output Drive Type | Dual-channel: OUT1/OUT2 open-drain P-type + OUT1B/OUT2B push-pull N-type - Enables full-wave bridge control of external MOSFETs. |
| Current Limit Threshold | 200 mV on CS pin - Sets maximum motor phase current via external sense resistor; shutdown occurs if exceeded. |
| VREF Output | 5.0 V ±0.5 V at 5 mA - Stable reference for VMIN, VPWM biasing, and external circuit calibration. |
| COSC Frequency | 30 kHz (typ.) with 220 pF - Determines PWM carrier frequency for speed regulation and EMI profile. |
| Operating Temp | −30 °C to +105 °C - Qualified for industrial and automotive-adjacent cooling applications without derating. |
| FG/RD Output | Open-collector, 10 mA sink - Provides pulse-per-revolution tach signal (FG) or rotation-stop flag (RD), selectable per design. |
Pinout & Package
AM4967RGSTR-G1 is housed in a 16-pin SSOP (Shrink Small Outline Package) with 0.65 mm pitch, 5.8 mm × 4.7 mm body size, and exposed thermal pad not present - suitable for compact fan control PCBs with standard reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 16 (OUT2, OUT1) | P-type driver output | Open-drain outputs requiring external pull-up resistors to VCC; drive high-side MOSFET gates in full-bridge topology. |
| 2, 15 (OUT2B, OUT1B) | N-type driver output | Push-pull outputs capable of sinking 20 mA; directly drive low-side MOSFET gates without external components. |
| 3 (VCC) | Main power supply | Primary 5.5–16 V input; powers internal logic, drivers, and VREF; decoupling capacitor required near pin. |
| 4 (CS) | Current sense comparator input | Monitors external shunt voltage; triggers shutdown when ≥200 mV - enables precise 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 20–100 kHz PWM or filtered DC (0–5 V); lower voltage = higher duty = faster motor rotation. |
| 7 (COSC) | Oscillator timing node | Connects to 220 pF capacitor to generate internal 30 kHz ramp used for PWM comparison and timing. |
| 8 (FG/RD) | Rotation status output | Selectable open-collector output: FG = tach pulses per revolution; RD = active-low rotation-stop flag. |
| 9, 10 (HIN−, HIN+) | Hall sensor differential input | Receives Hall-effect sensor signals; internal hysteresis ±10 mV rejects noise; layout proximity critical. |
| 11 (CT) | Lock detection timer | Charges/discharges 0.47 μF capacitor to set lock-protection timeout and auto-restart delay (~1.5 s typical). |
| 12 (LS) | Linear start control | Connected to VREF via 0.47–1 μF capacitor; controls soft-start ramp time to limit inrush current at power-on. |
| 13 (VREF) | Internal 5 V reference | Stable 5 V output (±0.5 V) at up to 20 mA; used for biasing VMIN, VPWM, and external analog circuits. |
| 14 (GND) | Signal ground | Common return for all internal circuitry; must be low-impedance connection to minimize noise coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Linear Start Function | Capacitor-controlled soft-start (0.47–1 μF on LS) limits turn-on current surge, preventing mechanical jerk and MOSFET stress. |
| External PWM Speed Control | Direct 20–100 kHz PWM interface on VPWM pin eliminates need for DAC or microcontroller analog output. |
| Integrated Lock Protection | CT pin with 0.47 μF sets fixed lock-detection window (~1.5 s); auto-restart occurs after timeout without external logic. |
| Rotation Speed Indication | Configurable FG/RD output delivers real-time tach feedback or binary rotation status - simplifies closed-loop monitoring. |
| Overtemperature Protection | Thermal shutdown activates above junction temperature limit; device resumes operation after cooldown - no latch required. |
Applications
| CPU Cooler Fan Control | Office Automation Fan System |
|---|---|
|
Use Scenario: Thermal management in high-performance desktop/server CPUs where dynamic fan speed adjustment reduces acoustic noise during light loads. IC Role / Device Role / Timing Role: Pre-driver IC generating complementary gate-drive signals for external N/P-channel MOSFETs based on Hall sensor feedback and VPWM command. Use Value: Enables precise 30 kHz PWM-controlled speed regulation across 0–100% range while maintaining stable commutation timing via COSC oscillator. |
Use Scenario: Intelligent cooling in multifunction printers and copiers where fan must operate reliably across wide ambient temperatures (−30 °C to +105 °C). IC Role / Device Role / Timing Role: Motor controller pre-driver providing lock protection, linear start, and FG tach output to system MCU for fault reporting and speed validation. Use Value: Eliminates need for discrete protection circuitry and external timing capacitors beyond CT/LS/COSC - reduces BOM count by ≥4 passive components. |
| Industrial Blower Module | Automotive Cabin Air Fan |
|
Use Scenario: High-air-volume blower in HVAC systems requiring robust current limiting and thermal resilience in dusty, vibration-prone environments. IC Role / Device Role / Timing Role: Full-wave pre-driver managing dual-MOSFET bridge with CS-based current foldback and CT-based stall recovery. Use Value: Sustains 16 V operation with 200 mV current limit threshold - supports >2 A motor phase current using standard 5 mΩ sense resistors. |
Use Scenario: Low-noise cabin air circulation fan in passenger vehicles where ESD immunity (2 kV HBM) and green packaging meet OEM environmental requirements. IC Role / Device Role / Timing Role: Brushless DC motor pre-driver delivering Hall-commutated gate drive with FG feedback for speed verification and RD for stall detection. Use Value: RoHS-compliant, halogen-free "Green" package (G1 suffix) and 2 kV ESD rating satisfy Tier-1 automotive qualification prerequisites. |
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 A4962KLPTR-T | Higher VCC max (40 V), integrated current sense amplifier, SPI interface - requires microcontroller coordination. | Targeted at industrial pumps with digital diagnostics; lacks linear start and FG/RD dual-mode output. | Choose for systems needing programmable diagnostics and >24 V operation; avoid if analog VPWM control and simple tach output are preferred. |
| TI DRV10983RSMT | Integrated power MOSFETs (3-A), no external driver needed; only 3.3/5 V logic supply; no CT/LS pins. | Optimized for ultra-compact fans <5 W; lacks external current sensing and lock-protection configurability. | Choose for space-constrained, low-power designs where integration outweighs flexibility; avoid for high-voltage (>12 V) or high-current (>2 A) systems. |
Compared with A4962KLPTR-T and DRV10983RSMT, AM4967RGSTR-G1 uniquely balances external component flexibility (SSOP-16 with discrete MOSFET drive), analog speed control simplicity (VPWM), and configurable protection (CT/LS/CS), making it optimal for cost-sensitive, high-reliability 12 V fan modules.
Availability
AM4967RGSTR-G1 is available at Aetrix Electronics and suitable for CPU cooler fan control, office automation cooling systems, industrial blower modules, and automotive cabin air fans requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AM4967RGSTR-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 manufacturer of discrete semiconductors and ICs, specializing in power management, signal integrity, and motor control solutions for industrial, computing, and consumer markets.
AM4967 belongs to Diodes' motor pre-driver product line, designed specifically for cost-effective, Hall-sensor-based BLDC fan control in high-volume thermal management applications - emphasizing minimal external components and robust protection features.
FAQ
What is the recommended external capacitor value for the COSC pin?
The COSC pin requires a 220 pF ceramic capacitor to ground to generate the internal 30 kHz oscillator frequency used for PWM timing and speed regulation. Deviations from this value shift the carrier frequency proportionally - e.g., 100 pF yields ~66 kHz, which may increase EMI but improve resolution. Diodes specifies 220 pF as optimal for stability and noise immunity in fan applications.
How does the linear start function prevent inrush current?
The LS pin connects to VREF through a 0.47–1 μF capacitor, creating a controlled voltage ramp that delays full gate drive activation. This extends startup time to ~100–500 ms depending on capacitance, allowing motor windings to energize gradually and limiting peak phase current to ≤150% of steady-state value - verified in Diodes' typical application circuit (Figure 13).
Can the FG/RD pin be used simultaneously for tach and rotation detection?
No - FG and RD modes are mutually exclusive and selected by external circuit configuration, not internal register. When used as FG, the pin outputs a pulse per Hall commutation event (typically 2 pulses/rev for 2-pole motors); as RD, it asserts low only during stall. Pull-up resistor value (typically 4.7 kΩ) and MCU input threshold determine functional mode - no internal switching is supported.
What is the maximum allowable voltage on the VPWM pin?
The VPWM pin withstands up to 7 V per Absolute Maximum Ratings, but Recommended Operating Conditions limit input to 0–5 V. Exceeding 5 V risks incorrect speed interpretation due to internal comparator saturation and may trigger undefined behavior in minimum speed or lock-detection logic - Diodes validates operation only within the 0–5 V range for reliable PWM-to-DC conversion.
AM4967RGSTR-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
AM4967RGSTR-G1 FAQ
1.How can I place an order for AM4967RGSTR-G1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AM4967RGSTR-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 AM4967RGSTR-G1 reliable?
The price and inventory of AM4967RGSTR-G1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AM4967RGSTR-G1 is usually 5 days.
3.What payment methods are accepted for AM4967RGSTR-G1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AM4967RGSTR-G1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AM4967RGSTR-G1?
AM4967RGSTR-G1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AM4967RGSTR-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 AM4967RGSTR-G1?
For technical support, including AM4967RGSTR-G1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AM4967RGSTR-G1 requirements.
6.How does Aetrix verify that AM4967RGSTR-G1 is sourced from the original manufacturer or authorized distributors?
All AM4967RGSTR-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 AM4967RGSTR-G1 meets industry standards.
7.What is the process for return or replacement of AM4967RGSTR-G1?
All AM4967RGSTR-G1 units undergo pre-shipment inspection (PSI). If there is an issue with AM4967RGSTR-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 AM4967RGSTR-G1 part is unused and in its original packaging.
Return procedure for AM4967RGSTR-G1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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