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Infineon Technologies TCA3727NKLA1
- Part No.:
- TCA3727NKLA1
- Manufacturer:
- Infineon Technologies
- Category:
- Motor Drivers, Controllers
- Package:
- 20-DIP (0.300", 7.62mm)
- Datasheet:
-
TCA3727NKLA1.pdf
- Description:
- IC MTR DRV BIPOLR 4.5-6.5V 20DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,063
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Product details
Overview
TCA3727NKLA1 from Infineon Technologies is a bipolar 2-phase stepper motor driver IC with integrated chopper current control, full-bridge output stages (Q11/Q12 and Q21/Q22), 0.75 A per phase continuous output current, 50 V max supply voltage, and support for full/half/quarter/mini-step microstepping modes. It drives bipolar stepper motors in industrial motion control systems requiring precise open-loop positioning.
For engineers reviewing the TCA3727NKLA1 datasheet, TCA3727NKLA1 pinout, TCA3727NKLA1 application, or TCA3727NKLA1 equivalent, key selection criteria include its integrated Z-diode logic supply (7 V), phase-offset oscillator timing, crossover-current-free H-bridge architecture, and digital current magnitude control via IX0/IX1 inputs.
Technical Context
The TCA3727NKLA1 implements a monolithic bipolar stepper driver with two independent full-bridge output stages, each featuring integrated fast free-wheeling diodes and current-sense resistor inputs (R1, R2). Its internal oscillator operates at ~25 kHz when pin 4 is grounded via 2.2 nF, generating phase-offset turn-on timing to minimize torque ripple.
Current regulation uses chopper control with digital input coding (IX0/IX1) to select four discrete current levels (0%, 33%, 67%, 100% of Imax) per phase. Logic supply is derived either externally at 5 V or internally from VS via series resistor + integrated 7 V Z-diode, enabling single-rail system integration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | ±750 mA per phase - supports NEMA 17–23 stepper motors with 0.5–1.2 Ω winding resistance |
| Supply Voltage (VS) | 5–50 V - compatible with 12 V, 24 V, and 48 V industrial power rails |
| Logic Supply (VL) | 4.5–6.5 V - selectable via external 5 V or internal 7 V Z-diode + series resistor |
| Oscillator Frequency | ~25 kHz - sets chopper switching rate; set by 2.2 nF capacitor on pin 4 to GND |
| Microstep Modes | Full, half, quarter, mini-step - configured via PH1/PH2 and IX0/IX1 logic inputs |
| Thermal Resistance (Rth,jc) | 18 K/W - measured on pin 5; enables 2 W dissipation in P-DIP-20-6 package |
| Standby Current | <1 mA - achieved by pulling INH (pin 17) low, reducing system idle power |
Pinout & Package
Packaged in P-DIP-20-6 (20-pin plastic dual in-line package, 0.6 inch width, 6.35 mm lead pitch), the TCA3727NKLA1 features through-hole mounting and industry-standard pin spacing for prototyping and industrial PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 19, 20 | Digital current control (IX0, IX1) | Selects 0%/33%/67%/100% Imax per phase via TTL/CMOS-compatible logic levels |
| 3, 18 | Phase direction (PH1, PH2) | H/L logic determines current polarity in respective winding (Q11→Q12 or reverse) |
| 4 | Oscillator timing | Connects to GND via 2.2 nF to set ~25 kHz chopper frequency |
| 7, 10, 11, 14 | Full-bridge outputs (Q11, Q12, Q21, Q22) | Push-pull drivers with integrated fast free-wheeling diodes; no external flyback diodes needed |
| 8, 13 | Current sense inputs (R1, R2) | Accept external sense resistors (e.g., 1 Ω) to set peak current per phase |
| 9 | Motor supply (VS) | Main power input (5–50 V); requires local 10 µF + 220 nF decoupling |
| 12 | Logic supply (VL) | 5 V input or VS-derived via series resistor + internal 7 V Z-diode |
| 17 | Inhibit (INH) | Active-low standby control; reduces quiescent current to <1 mA |
| 5, 6, 15, 16 | Ground (GND) | All internally connected; multiple pins reduce ground impedance and improve noise immunity |
Key Features
| Feature | Design Value |
|---|---|
| Integrated chopper current control | Eliminates need for external PWM controller or current-sense amplifier; simplifies BOM and layout |
| Crossover-current-free H-bridge | Prevents shoot-through during switching transitions, improving reliability and thermal safety |
| On-chip 7 V Z-diode for VL | Enables single-supply operation from VS without external regulator, reducing component count |
| Phase-offset oscillator timing | Reduces torque ripple and audible motor noise by staggering Q1/Q2 bridge activation |
| Four-level digital current programming | Supports dynamic current scaling (hold/run) without software or external DAC |
Applications
| Industrial CNC Positioning | Automated Test Equipment (ATE) |
|---|---|
Use Scenario: Open-loop X-Y table actuation in benchtop CNC mills with sub-0.01 mm repeatability. IC Role / Device Role / Timing Role: Bipolar stepper driver providing full/half-step sequencing and real-time current scaling for acceleration/deceleration profiles. Use Value: Integrated chopper control and phase-offset timing enable smooth motion with <5% torque ripple at 200 steps/sec. | Use Scenario: Precision actuator control in semiconductor wafer probers requiring repeatable Z-axis needle touchdown. IC Role / Device Role / Timing Role: Microstepping driver delivering mini-step resolution (1/16 step) with programmable hold current reduction. Use Value: Digital IX0/IX1 inputs allow firmware-controlled current reduction during dwell, cutting coil heating by 67% vs. full current. |
| Medical Lab Automation | 3D Printer Extruder Control |
Use Scenario: Reagent dispensing carousel in clinical analyzers requiring silent, jitter-free rotation at low speeds. IC Role / Device Role / Timing Role: Low-noise stepper driver using quarter-step mode and Z-diode-based VL to eliminate switching regulator EMI. Use Value: Crossover-current-free bridges and integrated free-wheeling diodes reduce conducted emissions below CISPR 11 Class B limits. | Use Scenario: Filament feed mechanism in desktop FDM printers where compact size and thermal margin are critical. IC Role / Device Role / Timing Role: Compact P-DIP-20-6 packaged driver delivering 750 mA/phase with 2 W dissipation capability on minimal copper area. Use Value: Rth,jc = 18 K/W allows sustained 750 mA operation at 110 °C case temperature without forced air cooling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bipolar stepper motor driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| L297 + L298N | Separate controller + dual H-bridge; requires external current sensing and PWM generation | Higher BOM count, larger footprint, no integrated Z-diode or phase-offset timing | Choose only if legacy design reuse or discrete tuning flexibility is required |
| TB6600HG | Higher current (4.5 A), but requires external logic supply and lacks integrated Z-diode for VL | Needs external 5 V rail or regulator; no single-supply VS derivation option | Prefer for high-torque NEMA 23+ motors; avoid when board space or supply simplicity is critical |
Compared with L297+L298N and TB6600HG, the TCA3727NKLA1 delivers superior integration-combining chopper control, Z-diode VL, and phase-offset timing in one P-DIP-20-6 IC-reducing component count by ≥7 parts and eliminating layout-sensitive analog current loops.
Availability
TCA3727NKLA1 is available at Aetrix Electronics and suitable for industrial CNC positioning, automated test equipment, medical lab automation, and 3D printer extruder control requiring stable component supply and long-term obsolescence management.
Supply support for TCA3727NKLA1 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
Infineon Technologies is a German semiconductor manufacturer specializing in power management, automotive, and industrial control ICs, with global manufacturing and quality certification to ISO/TS 16949 and IECQ QC 080000.
The TCA3727NKLA1 belongs to Infineon's legacy bipolar stepper driver product line, designed specifically for cost-sensitive, thermally constrained industrial motion systems requiring robust open-loop control without microcontroller overhead.
FAQ
What is the maximum allowable motor supply voltage for TCA3727NKLA1?
The absolute maximum supply voltage (VS) is 52 V, but the recommended operating range is 5–50 V per datasheet Rev. 2.0. Sustained operation above 50 V risks exceeding junction temperature limits and degrading long-term reliability, even with adequate heatsinking. Designers should maintain VS ≤ 50 V under all load and thermal conditions.
How does the TCA3727NKLA1 achieve crossover-current-free switching?
The IC uses internal dead-time control logic between complementary outputs (e.g., Q11 and Q12) to ensure one transistor fully turns off before the other turns on. This prevents simultaneous conduction across the high-side and low-side devices in each full-bridge stage, eliminating shoot-through current and associated power loss or thermal stress.
Can the TCA3727NKLA1 operate without an external oscillator capacitor?
No. Pin 4 (OSC) must be connected to GND via a 2.2 nF capacitor to establish the ~25 kHz chopper frequency. Omitting this capacitor disables current regulation, causing uncontrolled output current and potential device failure. The oscillator is not functional in crystal or external clock modes-it is strictly capacitor-timed.
What is the purpose of the Z-diode on the VL pin?
The integrated ~7 V Z-diode on pin 12 allows logic supply derivation directly from the motor supply (VS) using a series current-limiting resistor. This eliminates the need for a separate 5 V regulator, enabling single-rail system designs while maintaining stable 4.5–6.5 V logic operation across varying VS levels from 12 V to 48 V.
TCA3727NKLA1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- 20-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Motor Type - Stepper:
- Bipolar
- Motor Type - AC, DC:
- Brushed DC
- Function:
- Driver - Fully Integrated, Control and Power Stage
- Output Configuration:
- Half Bridge (4)
- Interface:
- Parallel
- Technology:
- Bipolar
- Step Resolution:
- 1, 1/2, 1/4
- Applications:
- General Purpose
- Current - Output:
- 1A
- Voltage - Supply:
- 4.5V ~ 6.5V
- Voltage - Load:
- 5V ~ 50V
- Operating Temperature:
- -40°C ~ 110°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- P-DIP-20-6
TCA3727NKLA1 FAQ
1.How can I place an order for TCA3727NKLA1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TCA3727NKLA1 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 TCA3727NKLA1 reliable?
The price and inventory of TCA3727NKLA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TCA3727NKLA1 is usually 5 days.
3.What payment methods are accepted for TCA3727NKLA1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TCA3727NKLA1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TCA3727NKLA1?
TCA3727NKLA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TCA3727NKLA1 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 TCA3727NKLA1?
For technical support, including TCA3727NKLA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TCA3727NKLA1 requirements.
6.How does Aetrix verify that TCA3727NKLA1 is sourced from the original manufacturer or authorized distributors?
All TCA3727NKLA1 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 TCA3727NKLA1 meets industry standards.
7.What is the process for return or replacement of TCA3727NKLA1?
All TCA3727NKLA1 units undergo pre-shipment inspection (PSI). If there is an issue with TCA3727NKLA1, 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 TCA3727NKLA1 part is unused and in its original packaging.
Return procedure for TCA3727NKLA1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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