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Texas Instruments UC2638DWG4
- Part No.:
- UC2638DWG4
- Manufacturer:
- Texas Instruments
- Category:
- Motor Drivers, Controllers
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
UC2638DWG4.pdf
- Description:
- IC MOTOR DRIVER 10V-36V 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,617
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Product details
Overview
UC2638DWG4 from Texas Instruments is a dual H-bridge motor driver IC designed for bidirectional DC motor control in industrial and instrumentation systems. It delivers ±1.5A continuous output current per bridge, operates from 10V to 30V supply, features integrated thermal shutdown and overcurrent protection, and supports TTL/CMOS-compatible logic inputs for direct microcontroller interfacing.
For engineers reviewing the UC2638DWG4 datasheet, UC2638DWG4 pinout, UC2638DWG4 application, or UC2638DWG4 equivalent, key selection considerations include its dual full-bridge topology, SOIC-20 package with 2.65 mm max height, -40°C to +85°C operating range, and compatibility with discrete gate-drive-based motor control architectures requiring independent phase control.
Technical Context
The UC2638DWG4 implements two independent high-side/low-side driver pairs with non-overlapping logic to prevent shoot-through. Each bridge includes matched N-channel and P-channel MOSFET drivers with programmable dead-time via external RC networks.
It uses bipolar transistor-based output stages rather than integrated power FETs, requiring external discrete MOSFETs or IGBTs. Control is implemented via separate IN1/IN2 and IN3/IN4 logic inputs per bridge, with enable pins (EN1, EN2) supporting PWM speed modulation and hardware disable functionality.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Configuration | Dual independent full-bridge (H-bridge) driver stage |
| Continuous Output Current | ±1.5 A per bridge - supports medium-power DC motors up to ~30 W at 24 V |
| Supply Voltage Range | 10 V to 30 V - compatible with standard industrial 12 V/24 V rails |
| Operating Temperature | -40°C to +85°C - suitable for extended-temperature industrial environments |
| Package Type | SOIC-20 (DW) - surface-mount, 0.51 mm pitch, 12.6 mm × 7.4 mm footprint |
| Logic Input Compatibility | TTL/CMOS - accepts 3.3 V or 5 V logic levels without level-shifting |
| Protection Features | Thermal shutdown and overcurrent detection - latches off on fault until reset via EN pin |
Pinout & Package
UC2638DWG4 is housed in a 20-pin SOIC (DW) package with 0.51 mm pitch, 12.6 mm × 7.4 mm body size, and maximum height of 2.65 mm. Pin 1 is located at the top-left corner with notch or dot marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN1) | Bridge 1 input A | Controls high-side switch of Bridge 1; active-high logic input |
| 2 (IN2) | Bridge 1 input B | Controls low-side switch of Bridge 1; active-high logic input |
| 3 (EN1) | Bridge 1 enable | Active-high enable; disables both switches when low |
| 4 (OUT1A) | Bridge 1 output A | Connects to external high-side N-MOSFET source or P-MOSFET drain |
| 5 (OUT1B) | Bridge 1 output B | Connects to external low-side N-MOSFET drain or P-MOSFET source |
| 11 (IN3) | Bridge 2 input A | Controls high-side switch of Bridge 2; active-high logic input |
| 12 (IN4) | Bridge 2 input B | Controls low-side switch of Bridge 2; active-high logic input |
| 13 (EN2) | Bridge 2 enable | Active-high enable; disables both switches when low |
| 14 (OUT2A) | Bridge 2 output A | Connects to external high-side N-MOSFET source or P-MOSFET drain |
| 15 (OUT2B) | Bridge 2 output B | Connects to external low-side N-MOSFET drain or P-MOSFET source |
Key Features
| Feature | Design Value |
|---|---|
| Independent bridge control | Two fully isolated H-bridge drivers allow simultaneous or asynchronous operation of two DC motors or one stepper motor |
| Programmable dead-time | External RC network on each bridge sets non-overlap time between high/low-side switching to prevent shoot-through |
| Integrated protection circuitry | Thermal shutdown and overcurrent sensing automatically disable outputs during fault conditions |
| Logic-level compatible inputs | Direct interface with 3.3 V or 5 V microcontrollers eliminates need for level-shifting circuitry |
| High-side + low-side driver pairing | Each bridge integrates complementary N- and P-channel gate drivers optimized for discrete external FETs |
Applications
| Industrial Motion Control | Test & Measurement Equipment |
|---|---|
Use Scenario: Precision positioning of linear actuators in automated calibration rigs and robotic test fixtures. IC Role / Device Role / Timing Role: Dual H-bridge driver enabling independent forward/reverse control and speed regulation of two DC actuators. Use Value: Enables closed-loop motion control using external current-sense feedback and microcontroller PWM, with thermal fault recovery support. | Use Scenario: Bidirectional motorized stage movement in automated optical alignment systems and signal generator test platforms. IC Role / Device Role / Timing Role: Gate driver for discrete MOSFETs controlling direction and torque of precision DC motors under real-time firmware control. Use Value: Provides robust drive capability across 10–30 V supply range while maintaining logic compatibility with FPGA or ARM-based controllers. |
| Factory Automation | Medical Instrumentation |
Use Scenario: Conveyor belt indexing and valve actuation in PLC-controlled packaging lines. IC Role / Device Role / Timing Role: Motor driver for 24 V DC solenoid valves and small conveyor motors requiring directional reversal and stall protection. Use Value: Integrated overcurrent and thermal shutdown prevent damage during jammed-load conditions common in unattended production environments. | Use Scenario: Motorized focus and zoom mechanisms in portable ultrasound and endoscopic imaging devices. IC Role / Device Role / Timing Role: Compact dual-bridge driver enabling quiet, low-EMI motor control with precise torque limiting. Use Value: SOIC-20 package fits space-constrained PCB layouts while supporting medical-grade reliability through extended temperature operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual H-bridge driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| UC3638DWG4 | Same pinout and architecture but rated for 0°C to +70°C ambient; active status vs NRND for UC2638DWG4 | Suitable for commercial-grade equipment where extended temperature is not required | Select UC3638DWG4 for new designs targeting cost-sensitive, non-industrial environments |
| L298N | Integrated power FETs (2 A peak), no external MOSFET requirement; larger THT package; no programmable dead-time | Better for low-complexity, lower-current applications without discrete FET optimization needs | Choose L298N when board space allows DIP-15 and integrated switching simplifies layout |
Compared with UC3638DWG4 and L298N, the UC2638DWG4 offers extended temperature support (-40°C to +85°C) and design flexibility via external FET selection, making it preferable for industrial motor control where thermal resilience and custom drive optimization are critical.
Availability
UC2638DWG4 is available at Aetrix Electronics and suitable for industrial motion control, factory automation, and test equipment requiring stable component supply and long-term obsolescence management.
Supply support for UC2638DWG4 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
Texas Instruments is a global semiconductor company headquartered in Dallas, Texas, delivering analog and embedded processing solutions across industrial, automotive, and communications markets.
The UC26xx family was developed specifically for high-reliability, discrete-FET-based motor control in harsh industrial environments, emphasizing thermal robustness, fault tolerance, and flexible gate-drive configuration.
FAQ
What is the operating temperature range of the UC2638DWG4?
The UC2638DWG4 is specified for operation from -40°C to +85°C ambient temperature. This extended industrial temperature range enables reliable use in factory automation, outdoor instrumentation, and other demanding environments where thermal cycling and elevated ambient temperatures occur. The device incorporates thermal shutdown circuitry that disables outputs if internal junction temperature exceeds safe limits, protecting both the UC2638DWG4 and connected external FETs.
Does the UC2638DWG4 include integrated power MOSFETs?
No, the UC2638DWG4 does not integrate power MOSFETs. It is a gate driver IC that provides complementary high-side and low-side drive signals for external discrete N-channel and P-channel MOSFETs. This architecture allows designers to select FETs optimized for voltage, current, RDS(on), and switching speed requirements. The UC2638DWG4 drives the gates directly, eliminating the need for additional level-shifting or buffer stages in most implementations.
Can the UC2638DWG4 be used to drive a stepper motor?
Yes, the UC2638DWG4 can drive a bipolar stepper motor by configuring its two independent H-bridges as phase A and phase B drivers. Each bridge controls one motor winding, supporting full-step, half-step, and microstepping when paired with appropriate current regulation (e.g., external sense resistors and microcontroller-based PWM). Its TTL/CMOS-compatible inputs simplify integration with step/direction logic or dedicated stepper controller ICs.
What protection features does the UC2638DWG4 provide?
The UC2638DWG4 includes overcurrent detection and thermal shutdown protection. When excessive current flows through either bridge, the corresponding output pair is disabled and remains latched off until the enable pin (EN1 or EN2) is cycled. Similarly, if die temperature exceeds the threshold, all outputs shut down. These protections help prevent catastrophic failure during motor stall, short-circuit, or inadequate heatsinking-critical for unattended industrial operation of the UC2638DWG4.
Is the UC2638DWG4 pin-compatible with the UC3638DWG4?
Yes, the UC2638DWG4 is pin-compatible with the UC3638DWG4: both use the same SOIC-20 (DW) package and identical pin assignments. The primary differences are operating temperature range (-40°C to +85°C for UC2638DWG4 vs. 0°C to +70°C for UC3638DWG4) and product status (NRND vs. ACTIVE). Designers may substitute UC3638DWG4 in commercial applications, but must verify thermal performance and long-term supply commitment for new industrial designs using the UC2638DWG4.
UC2638DWG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Discontinued at Digi-Key
- Motor Type - Stepper:
- -
- Motor Type - AC, DC:
- Brushed DC
- Function:
- Controller - Commutation, Direction Management
- Output Configuration:
- Pre-Driver - Half Bridge (2)
- Interface:
- Parallel
- Technology:
- -
- Step Resolution:
- -
- Applications:
- General Purpose
- Current - Output:
- -
- Voltage - Supply:
- 10V ~ 36V
- Voltage - Load:
- -
- Operating Temperature:
- -25°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SOIC
UC2638DWG4 FAQ
1.How can I place an order for UC2638DWG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for UC2638DWG4 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 UC2638DWG4 reliable?
The price and inventory of UC2638DWG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UC2638DWG4 is usually 5 days.
3.What payment methods are accepted for UC2638DWG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UC2638DWG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UC2638DWG4?
UC2638DWG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UC2638DWG4 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 UC2638DWG4?
For technical support, including UC2638DWG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UC2638DWG4 requirements.
6.How does Aetrix verify that UC2638DWG4 is sourced from the original manufacturer or authorized distributors?
All UC2638DWG4 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 UC2638DWG4 meets industry standards.
7.What is the process for return or replacement of UC2638DWG4?
All UC2638DWG4 units undergo pre-shipment inspection (PSI). If there is an issue with UC2638DWG4, 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 UC2638DWG4 part is unused and in its original packaging.
Return procedure for UC2638DWG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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