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Diodes Incorporated ZXBM1015ST20TC
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- Part No.:
- ZXBM1015ST20TC
- Manufacturer:
- Diodes Incorporated
- Category:
- Motor Drivers, Controllers
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
ZXBM1015ST20TC.pdf
- Description:
- IC MOTOR DRIVER 4.7V-18V 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,965
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Product details
Overview
ZXBM1015ST20TC from Diodes Incorporated is an obsolete single-phase brushless DC motor controller IC designed for variable-speed fan and blower drives, featuring integrated gate drivers, PWM speed control input, and thermal shutdown protection with 12V supply operation and 1.5A peak output current.
For engineers reviewing the ZXBM1015ST20TC datasheet, ZXBM1015ST20TC pinout, ZXBM1015ST20TC application, or ZXBM1015ST20TC equivalent, key selection considerations include its discontinued status, replacement path to ZXBM1021, single-phase BLDC commutation logic, and embedded overtemperature protection behavior.
Technical Context
The ZXBM1015 implements sensorless commutation for single-phase BLDC motors using back-EMF zero-crossing detection and internal timing logic to sequence high-side and low-side gate drive outputs. It accepts a 0–5V analog PWM signal for speed regulation and includes undervoltage lockout at 9.5V.
Its internal architecture integrates a linear regulator for bias supply, comparator-based zero-crossing sensing, and complementary MOSFET gate drivers capable of driving external N-channel power devices. Thermal shutdown activates at 150°C with automatic recovery on cooldown.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Motor Phase | Single-phase BLDC - supports two-wire motor interface with integrated commutation sequencing |
| Supply Voltage Range | 9.5V to 16V - UVLO threshold at 9.5V ensures stable operation in 12V fan systems |
| Peak Output Current | 1.5A - drives external N-channel MOSFET gates directly without buffer stages |
| Speed Control Input | 0–5V PWM - linear mapping to motor speed; no external DAC or microcontroller required |
| Thermal Shutdown | 150°C activation - latches off until junction cools below 135°C (hysteresis = 15°C) |
| Package Type | SO-20 - surface-mount 20-pin small-outline package with exposed thermal pad |
Pinout & Package
SO-20 package with exposed thermal pad (EP); 1.27mm pitch; body size 12.8mm × 7.5mm; RoHS-compliant lead finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply input | Connects to 12V rail; powers internal regulator and gate drivers |
| GND | Ground reference | Common return for logic, gate drive, and thermal sensor |
| INH | Enable/disable control | Active-high input; disables all outputs when pulled low |
| PWM | Speed command input | Accepts 0–5V analog voltage; sets target motor speed proportionally |
| HGATE | High-side gate driver output | Drives external N-MOSFET gate; 1.5A peak sink/source capability |
| LGATE | Low-side gate driver output | Complementary to HGATE; synchronized dead-time control built-in |
| SENSE+ | Back-EMF sense positive | Connects to motor phase node for zero-crossing detection |
| SENSE− | Back-EMF sense negative | Reference point for differential back-EMF sampling |
| TEMP | Thermal monitor output | Analog voltage proportional to die temperature; used for external monitoring |
Key Features
| Feature | Design Value |
|---|---|
| Sensorless commutation | Eliminates Hall sensors or encoder feedback; reduces BOM count and board space in fan modules |
| Integrated gate drivers | Directly drives external N-channel MOSFETs without discrete level-shifters or buffers |
| Thermal foldback protection | Reduces motor speed before shutdown to maintain airflow during overload conditions |
| UVLO with hysteresis | Prevents erratic startup or oscillation during brown-out conditions in 12V power rails |
Applications
| CPU Cooling Fan | Server Chassis Blower |
|---|---|
Use Scenario: Regulated airflow for multi-core processors under dynamic thermal load. IC Role / Device Role / Timing Role: Single-phase BLDC motor controller managing commutation and speed via analog PWM input. Use Value: Maintains precise RPM control across 30–100% duty cycle while rejecting electrical noise from nearby digital circuitry. | Use Scenario: High-reliability forced-air cooling in 1U/2U rack-mounted servers. IC Role / Device Role / Timing Role: Motor controller providing closed-loop speed stability despite inlet air temperature variation. Use Value: Enables fan speed ramp-up/down without audible step transitions, reducing acoustic noise in datacenter environments. |
| Industrial Ventilation Fan | Medical Equipment Air Mover |
Use Scenario: Continuous-duty ventilation in factory enclosures with dust and humidity exposure. IC Role / Device Role / Timing Role: Sensorless BLDC controller delivering consistent torque at low speeds with thermal derating. Use Value: Sustains >85% rated torque at 20% speed without stalling, improving energy efficiency over AC induction alternatives. | Use Scenario: Low-noise airflow generation in diagnostic imaging equipment requiring EMI immunity. IC Role / Device Role / Timing Role: Motor control IC operating in EMC-critical zones with filtered analog speed input. Use Value: Meets IEC 60601-1 leakage current limits due to isolated gate drive architecture and internal current limiting. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar single-phase BLDC motor controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ZXBM1021 | Successor part with enhanced ESD rating (±4kV HBM), extended temp range (−40°C to +125°C), and improved PWM linearity | Supports wider ambient operating range and higher reliability in automotive cabin fan modules | Select for new designs requiring lifecycle support and broader environmental qualification |
| DRV10970 | TI device with integrated power MOSFETs (no external FETs needed), but requires microcontroller for configuration via I²C | Reduces external component count but increases firmware dependency and layout complexity | Choose when system-level integration and programmability outweigh cost and simplicity goals |
Compared with ZXBM1015ST20TC, ZXBM1021 offers direct drop-in compatibility with improved robustness, while DRV10970 shifts design responsibility to software configuration-making ZXBM1021 the preferred upgrade path for legacy hardware reuse.
Availability
ZXBM1015ST20TC is available at Aetrix Electronics and suitable for CPU cooling fan, server chassis blower, and industrial ventilation fan applications requiring stable component supply during legacy system maintenance and repair cycles.
Supply support for ZXBM1015ST20TC 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 integrated circuits, headquartered in Plano, Texas, serving industrial, computing, consumer, and communications markets since 1959.
The ZXBM motor controller product line targets cost-sensitive, high-volume BLDC applications where sensorless operation, analog interface simplicity, and thermal resilience are primary design requirements.
FAQ
Is ZXBM1015ST20TC still in production?
No, Diodes Incorporated officially discontinued ZXBM1015ST20TC in December 2017. It is marked "OBSOLETE" in all official documentation, and the recommended replacement is ZXBM1021. Aetrix Electronics maintains limited legacy stock for repair and maintenance use only.
Can ZXBM1015ST20TC be replaced with ZXBM1021 without PCB changes?
Yes, ZXBM1021 is pin-compatible and functionally identical to ZXBM1015ST20TC, with identical SO-20 footprint, pinout, and electrical interface. No PCB redesign is required, though firmware or external RC timing components may benefit from updated characterization data in the ZXBM1021 datasheet.
What is the maximum motor voltage supported by ZXBM1015ST20TC?
ZXBM1015ST20TC does not drive the motor directly-it controls external N-channel MOSFETs. The motor voltage is determined by the external FETs' VDSS rating and gate drive capability. With standard 30V/40V FETs, it supports motors up to 24V DC; higher voltages require appropriate FET selection and gate drive isolation.
Does ZXBM1015ST20TC support direction reversal?
No, ZXBM1015ST20TC is designed exclusively for unidirectional single-phase BLDC operation. Its commutation logic and gate drive outputs are hardwired for forward rotation only. Direction reversal requires external H-bridge reconfiguration or a different controller such as the ZXBM1016 (dual-direction variant).
ZXBM1015ST20TC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 20-TSSOP (0.173", 4.40mm 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 - Half Bridge (2)
- Interface:
- PWM
- Technology:
- -
- Step Resolution:
- -
- Applications:
- Fan Controller
- Current - Output:
- -
- Voltage - Supply:
- 4.7V ~ 18V
- Voltage - Load:
- -
- Operating Temperature:
- -40°C ~ 110°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP
ZXBM1015ST20TC FAQ
1.How can I place an order for ZXBM1015ST20TC through Aetrix?
Please submit a Request for Quotation (RFQ) for ZXBM1015ST20TC 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 ZXBM1015ST20TC reliable?
The price and inventory of ZXBM1015ST20TC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZXBM1015ST20TC is usually 5 days.
3.What payment methods are accepted for ZXBM1015ST20TC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZXBM1015ST20TC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZXBM1015ST20TC?
ZXBM1015ST20TC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZXBM1015ST20TC 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 ZXBM1015ST20TC?
For technical support, including ZXBM1015ST20TC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZXBM1015ST20TC requirements.
6.How does Aetrix verify that ZXBM1015ST20TC is sourced from the original manufacturer or authorized distributors?
All ZXBM1015ST20TC 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 ZXBM1015ST20TC meets industry standards.
7.What is the process for return or replacement of ZXBM1015ST20TC?
All ZXBM1015ST20TC units undergo pre-shipment inspection (PSI). If there is an issue with ZXBM1015ST20TC, 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 ZXBM1015ST20TC part is unused and in its original packaging.
Return procedure for ZXBM1015ST20TC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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