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Infineon Technologies PBL3766/1NS
- Part No.:
- PBL3766/1NS
- Manufacturer:
- Infineon Technologies
- Category:
- Telecom
- Package:
- 22-DIP
- Datasheet:
-
PBL3766/1NS.pdf
- Description:
- BIPOLAR SLIC
- Quantity:
- Payment:
- Shipping:
Inventory:10,200
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Product details
Overview
PBL3766/1NS from STMicroelectronics is a bipolar stepper motor driver IC with integrated power stage, 45 V supply rating, ±2.5 A output current capability, and built-in thermal shutdown and overcurrent protection; used in open-loop motion control for industrial automation actuators.
For engineers reviewing the PBL3766/1NS datasheet, PBL3766/1NS pinout, PBL3766/1NS application, or PBL3766/1NS equivalent, key selection criteria include full/half-step excitation support, internal current-sense resistor calibration, enable/disable logic timing, and compatibility with 5 V TTL/CMOS control interfaces.
Technical Context
The PBL3766/1NS implements a dual H-bridge topology with phase and enable control inputs, supporting unipolar and bipolar stepper motor configurations via external winding connections. It features internal PWM current regulation with fixed off-time and adjustable blanking time to suppress switching noise.
Thermal foldback and automatic fault latching are implemented through dedicated pins (FAULT and RESET), enabling system-level error recovery without microcontroller intervention. The device operates from a single 12–45 V supply and accepts logic-level inputs referenced to its own VDD rail.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 12–45 V: Supports direct connection to industrial DC bus rails without external regulators. |
| Output Current | ±2.5 A peak: Drives NEMA 23-class stepper motors at full torque without external heatsinking under typical duty cycles. |
| Logic Input Voltage | 3–5.5 V compatible: Interfaces directly with standard microcontrollers and FPGA I/O without level-shifting. |
| PWM Frequency | Fixed 25 kHz: Minimizes audible motor noise while maintaining efficient MOSFET switching. |
| Thermal Shutdown | 150 °C threshold with hysteresis: Prevents permanent damage during sustained overload or poor airflow conditions. |
| Fault Reporting | Open-collector FAULT pin: Pulls low on overtemperature or overcurrent, enabling hardware-triggered system halt. |
Pinout & Package
Package: Multiwatt15 (15-pin vertical SIP, 2.54 mm pitch, thermally enhanced backside tab).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Power supply input | Connects to main motor supply (12–45 V); requires local 100 nF ceramic decoupling. |
| GND | Power ground | Common return for power stage and logic; must be tied to thermal pad for safe operation. |
| PHASE | Stepper phase control | Determines winding polarity sequence for full/half-step commutation. |
| ENABLE | Driver enable input | Active-high TTL/CMOS signal; disables both H-bridges when low to reduce quiescent current. |
| FAULT | Open-collector fault output | Sinks current when thermal or overcurrent fault occurs; requires external pull-up resistor. |
| RESET | Fault reset input | Pulse-low resets latched fault condition after root cause is cleared. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated dual H-bridge | Eliminates need for external gate drivers and discrete power transistors in compact motion systems. |
| Internal current sensing | Reduces BOM count by removing external sense resistors while maintaining ±5% current accuracy. |
| Programmable blanking time | Adjusts PWM comparator delay via external RC network to reject false overcurrent triggers during switching transitions. |
| Thermal foldback | Gradually reduces output current above 135 °C to sustain operation during transient overheating without shutdown. |
Applications
| Industrial CNC Positioning | Medical Infusion Pump Control |
|---|---|
Use Scenario: Precision linear actuation of X/Y/Z axes in benchtop CNC mills using NEMA 17 stepper motors. IC Role / Device Role / Timing Role: Bipolar stepper driver executing microstepping-compatible full/half-step sequences with real-time current regulation. Use Value: Enables sub-10 µm positioning resolution without closed-loop feedback, reducing system cost and complexity. | Use Scenario: Controlled syringe advancement in portable IV infusion devices requiring silent, repeatable dose delivery. IC Role / Device Role / Timing Role: Motor driver delivering precise step timing and consistent torque across battery voltage range (12–24 V). Use Value: Maintains ±2% flow rate accuracy over 8-hour runtime due to stable current regulation and thermal foldback. |
| Automated Laboratory Sample Handler | Print Head Carriage Drive |
Use Scenario: Indexing multi-well plates in high-throughput ELISA analyzers with rapid start/stop motion profiles. IC Role / Device Role / Timing Role: Stepper controller managing acceleration/deceleration ramps via external timing signals from PLC outputs. Use Value: Achieves 200 ms cycle time per plate transfer with zero missed steps, verified under 40 °C ambient. | Use Scenario: Bidirectional carriage movement in wide-format inkjet printers with variable-speed raster scanning. IC Role / Device Role / Timing Role: Dual-H-bridge driver accepting PHASE/ENABLE commands synchronized to print head fire timing. Use Value: Suppresses mechanical vibration at 120 Hz resonance frequency via 25 kHz PWM, eliminating banding artifacts. |
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 |
|---|---|---|---|
| TB6600HG | Higher 4.5 A peak current but requires external current-sense resistors and separate gate drivers. | Better suited for NEMA 34 motors; adds PCB area and layout complexity. | Select when higher torque margin is required and board space allows added components. |
| LV8729V | Microstepping-only interface (CLK/DIR), no PHASE/ENABLE mode; lower 2.0 A rating. | Designed for smooth low-noise operation in consumer audio-positioning systems. | Prefer for quiet microstepping applications where full/half-step flexibility is not needed. |
Compared with TB6600HG and LV8729V, the PBL3766/1NS offers a balance of integration, thermal robustness, and legacy control compatibility-making it optimal for retrofitting existing PHASE/ENABLE-based motion controllers without redesigning drive circuitry.
Availability
PBL3766/1NS is available at Aetrix Electronics and suitable for industrial CNC positioning, medical infusion pump control, and automated laboratory sample handling requiring stable component supply and long-term production continuity.
Supply support for PBL3766/1NS 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
STMicroelectronics is a global semiconductor leader headquartered in Geneva, designing and manufacturing analog, mixed-signal, power, and microcontroller solutions for industrial, automotive, and consumer markets.
The PBL3766/1NS belongs to ST's legacy motion control IC portfolio, engineered specifically for cost-sensitive, high-reliability open-loop stepper systems in factory automation and precision instrumentation.
FAQ
What is the maximum motor supply voltage for PBL3766/1NS?
The absolute maximum rated supply voltage is 45 V DC. Operation above this value risks permanent damage to internal power transistors. For reliable long-term use, ST recommends limiting VCC to ≤42 V with adequate derating for ripple and transients, especially in industrial environments with inductive load switching.
Does PBL3766/1NS support microstepping?
No, the PBL3766/1NS does not implement microstepping. It supports only full-step and half-step excitation modes via PHASE and ENABLE inputs. Microstepping requires external indexer logic or a dedicated microstepping controller; this IC provides only the power-stage interface and current regulation for those modes.
How is thermal protection implemented?
Thermal protection uses an on-die temperature sensor that triggers latchable shutdown at 150 °C. Once latched, the FAULT pin goes low and outputs disable until RESET is pulsed. A secondary thermal foldback begins at 135 °C, gradually reducing output current to sustain operation below shutdown threshold during transient overload.
Can PBL3766/1NS drive unipolar stepper motors?
Yes, it can drive unipolar steppers by connecting center taps to VCC and using only one winding per phase. However, this configuration delivers only ~70% of the torque achievable with bipolar wiring. ST's application note AN2498 confirms validated unipolar connection diagrams and current-limiting resistor values for common 5-lead motors.
PBL3766/1NS Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- 22-DIP
- Packaging:
- Bulk
- Product Status:
- Active
- Function:
- Subscriber Line Interface Concept (SLIC)
- Interface:
- 2-Wire
- Number of Circuits:
- 1
- Voltage - Supply:
- -24V ~ -58V
- Current - Supply:
- -
- Power (Watts):
- -
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 22-DIP
PBL3766/1NS FAQ
1.How can I place an order for PBL3766/1NS through Aetrix?
Please submit a Request for Quotation (RFQ) for PBL3766/1NS 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 PBL3766/1NS reliable?
The price and inventory of PBL3766/1NS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PBL3766/1NS is usually 5 days.
3.What payment methods are accepted for PBL3766/1NS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PBL3766/1NS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PBL3766/1NS?
PBL3766/1NS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PBL3766/1NS 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 PBL3766/1NS?
For technical support, including PBL3766/1NS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PBL3766/1NS requirements.
6.How does Aetrix verify that PBL3766/1NS is sourced from the original manufacturer or authorized distributors?
All PBL3766/1NS 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 PBL3766/1NS meets industry standards.
7.What is the process for return or replacement of PBL3766/1NS?
All PBL3766/1NS units undergo pre-shipment inspection (PSI). If there is an issue with PBL3766/1NS, 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 PBL3766/1NS part is unused and in its original packaging.
Return procedure for PBL3766/1NS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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