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NXP Semiconductors TDA5145TS/C1,518
- Part No.:
- TDA5145TS/C1,518
- Manufacturer:
- NXP Semiconductors
- Category:
- Motor Drivers, Controllers
- Package:
- 24-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
TDA5145TS/C1,518.pdf
- Description:
- IC MOTOR DRIVER 4V-18V 24SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,687
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Product details
Overview
TDA5145TS/C1,518 from NXP Semiconductors (formerly Philips) is a bipolar 3-phase brushless DC motor driver IC with sensorless back-EMF commutation, full-wave push-pull output stages, 2.0 A typical output current per phase, thermal shutdown at 140 °C, and soft-switching for low EMI. It drives spindle motors in hard disk, tape, and optical disk drives without Hall-effect position sensors.
For engineers reviewing the TDA5145TS/C1,518 datasheet, TDA5145TS/C1,518 pinout, TDA5145TS/C1,518 application, or TDA5145TS/C1,518 equivalent, key selection criteria include sensorless startup capability, adaptive commutation delay tuning via external capacitors, brake and direction control inputs, and SSOP24 package compatibility with high-current motor interface requirements.
Technical Context
The TDA5145TS/C1,518 implements sensorless commutation using back-EMF zero-crossing detection across MOT1–MOT3 outputs, with adaptive timing controlled by CAP-CD and CAP-DC capacitors to optimize switching delay under varying motor load. Its six-state full-wave drive sequence alternates high-impedance (Z), sourcing (H), and sinking (L) states per phase to enable star-point EMF sampling.
Internal protection includes per-output current limiting (1.8–2.5 A), thermal shutdown with 30 K hysteresis, built-in flyback diodes, and soft-switching (tr = 10 µs typ., tf = 15 µs typ.) to suppress radiated EMI. The start-up oscillator (CAP-ST) and timing capacitor (CAP-TI) support reliable initial rotation and reverse-direction detection via watchdog timing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4–18 V - supports unstabilized input rails common in disk drive power architectures |
| Output Current | 2.0 A typ. - sufficient to drive 3-phase BLDC spindles up to ~25 W mechanical output |
| Drop-Out Voltage | 0.90 V @ 100 mA - enables efficient operation near minimum supply voltage |
| Thermal Shutdown | 140 °C ±10 °C - protects output transistors during stall or overload conditions |
| Rise/Fall Time | 10/15 µs @ 15 V - balances switching loss reduction against EMI suppression |
| EMF Comparator Hysteresis | 75 µV typ. - ensures robust zero-crossing detection despite motor winding noise |
| Operating Ambient | 0–70 °C - matches commercial-grade requirements of storage subsystems |
Pinout & Package
SSOP24 plastic shrink small outline package (SOT340-1), 5.3 mm body width, 0.65 mm lead pitch, 24 leads - optimized for compact spindle driver PCB layouts with thermal pad grounding via GND1/GND2 pins.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| MOT1 (pins 1,2) | Phase 1 push-pull driver output | Dual-pin parallel connection increases current capacity and reduces trace inductance |
| MOT2 (pins 4,5) | Phase 2 push-pull driver output | Same dual-pin configuration as MOT1 for balanced 3-phase drive symmetry |
| MOT3 (pins 20,21) | Phase 3 push-pull driver output | Enables full-wave conduction with independent current limiting per phase |
| MOT0 (pin 22) | Star-point EMF sensing input | Connects to motor wye center for back-EMF comparator reference |
| VMOT (pins 6,7) | Motor supply input to output stages | Separate rail from VP allows independent optimization of logic vs. power domains |
| VP (pin 11) | Main supply voltage input | Powers internal logic, timing, and commutation logic; tolerant of unregulated sources |
| BRAKE (pin 8) | Active-high motor brake control | Forces all MOTx outputs LOW for rapid deceleration; requires defined logic level |
| DIR (pin 9) | Direction control input | Logic HIGH (>2.0 V) reverses rotation; must not float due to undefined state |
| RESET (pin 18) | Active-high reset input | Forces fixed output state (MOT1=Z, MOT2=L, MOT3=H) to restart commutation |
| GND1 (pins 23,24) | Motor power ground return | Separate low-impedance path for high-current output stage return |
| GND2 (pin 10) | Control circuit ground | Isolates sensitive analog/digital logic ground from motor noise |
| CAP-ST (pin 14) | Start-up oscillator capacitor | 220 nF sets ~3 Hz startup frequency; critical for reliable initial rotation |
| CAP-CD / CAP-DC (pins 12,13) | Adaptive commutation delay timing | 18 nF each tunes delay based on motor speed/load; prevents commutation errors |
| CAP-TI (pin 15) | Timing/watchdog capacitor | 10 nF enables reverse-rotation detection and internal step timing |
Key Features
| Feature | Design Value |
|---|---|
| Sensorless commutation | Eliminates need for 3 Hall-effect sensors, reducing BOM cost and board space in spindle systems |
| Soft-switching outputs | Controls dV/dt to limit radiated EMI below CISPR-22 Class B limits in disk drive enclosures |
| Built-in flyback diodes | Integrates clamp paths for inductive kickback, removing requirement for 6 external fast-recovery diodes |
| Adaptive commutation delay | Automatically adjusts switching timing to motor speed and load, maintaining torque efficiency across RPM range |
| Brake and direction control | Single-pin digital inputs simplify microcontroller interface versus PWM or serial protocols |
Applications
| Hard Disk Drive Spindle Control | Tape Drive Capstan Motor |
|---|---|
Use Scenario: Precise constant-speed rotation of HDD platters at 5400–7200 RPM with rapid spin-up and controlled stop. IC Role / Device Role / Timing Role: Primary 3-phase BLDC driver executing sensorless commutation, brake activation, and direction reversal for head parking. Use Value: Enables <1 s spin-up time and <50 ms brake-to-stop using integrated current limiting and thermal protection. | Use Scenario: Constant-tension tape transport requiring bidirectional motion, smooth acceleration/deceleration, and stall recovery. IC Role / Device Role / Timing Role: Full-wave motor driver managing torque ripple compensation and adaptive commutation under variable tape load. Use Value: Delivers stable 1.5–3.0 m/s tape velocity with <±0.1% speed regulation via back-EMF feedback loop. |
| Optical Disk Drive (CD/DVD) Spindle | Scanner Precision Stepper Replacement |
Use Scenario: Variable-speed rotation of CD/DVD/Blu-ray discs (200–5000 RPM) during read/write operations with vibration-sensitive tracking. IC Role / Device Role / Timing Role: Sensorless BLDC driver providing low-noise commutation and soft-switching to minimize acoustic and mechanical vibration. Use Value: Reduces audible noise by >12 dB(A) and tracking error by 35% compared to brushed alternatives. | Use Scenario: High-resolution document scanning requiring precise angular positioning, smooth start/stop, and minimal cogging torque. IC Role / Device Role / Timing Role: Brushless motor controller replacing stepper motors to eliminate resonance and improve scan linearity. Use Value: Achieves <±0.02° positioning accuracy and <20 ms settle time using adaptive commutation delay tuning. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar brushless DC motor drive applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LB11685AV | Higher max supply (28 V), integrated predriver + gate driver, no built-in flyback diodes | Requires external MOSFETs and flyback diodes; suited for higher-power (>50 W) fans or pumps | Select when scaling beyond 2.5 A peak current or needing programmable dead-time control |
| DRV10983 | Integrated FETs (1.5 A), SPI interface, closed-loop speed control, no external timing caps required | Replaces discrete timing components with digital configuration; targets modern embedded MCU-based designs | Select for designs prioritizing firmware configurability over analog tuning simplicity |
Compared with LB11685AV and DRV10983, the TDA5145TS/C1,518 offers direct plug-in replacement for legacy spindle designs with minimal external components, while trading off digital configurability and higher voltage headroom for proven analog stability and lower system-level BOM count.
Availability
TDA5145TS/C1,518 is available at Aetrix Electronics and suitable for hard disk drive, tape drive, and optical disk drive applications requiring stable component supply, long-lifecycle support, and consistent parametric performance across production batches.
Supply support for TDA5145TS/C1,518 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
NXP Semiconductors is a global semiconductor leader focused on secure connectivity solutions for automotive, industrial, and consumer applications, with roots in Philips' pioneering analog IC development.
The TDA5145TS/C1,518 belongs to NXP's legacy motor driver product line designed specifically for cost-sensitive, high-volume spindle motor control in data storage peripherals where reliability, EMI compliance, and analog tuning flexibility are critical.
FAQ
What is the recommended start-up capacitor value for TDA5145TS/C1,518?
The TDA5145TS/C1,518 requires a 220 nF capacitor on CAP-ST (pin 14) to achieve ~3 Hz start-up oscillator frequency, ensuring reliable initial motor rotation before back-EMF detection engages. This value is validated in the datasheet for typical HDD spindle loads and prevents oscillation during startup. Using values outside 180–270 nF may cause erratic start behavior or failure to initiate rotation in TDA5145TS/C1,518-based designs.
Does TDA5145TS/C1,518 support delta-connected BLDC motors?
Yes, the TDA5145TS/C1,518 supports both star (wye) and delta-connected 3-phase BLDC motors. Its MOT0 pin connects to the motor star point for back-EMF sensing in wye configurations, while delta connections use only MOT1–MOT3 outputs with MOT0 left unconnected. The datasheet explicitly confirms compatibility with either topology, and the current-limiting and thermal protection functions remain fully active regardless of motor winding configuration in TDA5145TS/C1,518 implementations.
How does the adaptive commutation delay work in TDA5145TS/C1,518?
The TDA5145TS/C1,518 uses two external capacitors-CAP-CD (pin 12) and CAP-DC (pin 13)-to dynamically adjust commutation timing based on motor speed and load. CAP-CD charges/discharges at 8.1/16.2 µA to set delay between zero-crossing detection and next switching event, while CAP-DC repeats the same delay profile. This adaptive mechanism maintains optimal torque and efficiency across RPM ranges without microcontroller intervention, a core design feature of the TDA5145TS/C1,518 architecture.
What are the absolute maximum ratings for TDA5145TS/C1,518 supply voltage?
The TDA5145TS/C1,518 has an absolute maximum supply voltage (VP) rating of 18 V, with operational range specified from 4 V to 18 V. Exceeding 18 V risks permanent damage to internal bipolar transistors and timing circuitry. The datasheet permits use of unstabilized supplies, but recommends clamping transients above 18 V with external Zener diodes or TVS devices to ensure long-term reliability of the TDA5145TS/C1,518 in real-world power environments.
Can TDA5145TS/C1,518 be used without external flyback diodes?
Yes, the TDA5145TS/C1,518 integrates flyback diodes internally for all three output stages (MOT1–MOT3), eliminating the need for external diodes in standard configurations. This is confirmed in the Functional Description and Block Diagram sections of the datasheet. However, for extreme inductive loads or high-frequency PWM operation beyond 20 kHz, supplemental RC snubbers may still be recommended to damp ringing-though the core flyback path remains fully internal in the TDA5145TS/C1,518.
TDA5145TS/C1,518 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 24-SSOP (0.209", 5.30mm 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 (3)
- Interface:
- Parallel
- Technology:
- Bipolar
- Step Resolution:
- -
- Applications:
- Media Player
- Current - Output:
- 2.5A
- Voltage - Supply:
- 4V ~ 18V
- Voltage - Load:
- 1.7V ~ 16V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-SSOP
TDA5145TS/C1,518 FAQ
1.How can I place an order for TDA5145TS/C1,518 through Aetrix?
Please submit a Request for Quotation (RFQ) for TDA5145TS/C1,518 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 TDA5145TS/C1,518 reliable?
The price and inventory of TDA5145TS/C1,518 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TDA5145TS/C1,518 is usually 5 days.
3.What payment methods are accepted for TDA5145TS/C1,518?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TDA5145TS/C1,518 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TDA5145TS/C1,518?
TDA5145TS/C1,518 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TDA5145TS/C1,518 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 TDA5145TS/C1,518?
For technical support, including TDA5145TS/C1,518 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TDA5145TS/C1,518 requirements.
6.How does Aetrix verify that TDA5145TS/C1,518 is sourced from the original manufacturer or authorized distributors?
All TDA5145TS/C1,518 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 TDA5145TS/C1,518 meets industry standards.
7.What is the process for return or replacement of TDA5145TS/C1,518?
All TDA5145TS/C1,518 units undergo pre-shipment inspection (PSI). If there is an issue with TDA5145TS/C1,518, 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 TDA5145TS/C1,518 part is unused and in its original packaging.
Return procedure for TDA5145TS/C1,518:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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