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Texas Instruments UC2950TG3
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- Part No.:
- UC2950TG3
- Manufacturer:
- Texas Instruments
- Category:
- Full Half-Bridge (H Bridge) Drivers
- Package:
- TO-220-5
- Datasheet:
-
UC2950TG3.pdf
- Description:
- IC HALF BRIDGE DRIVER 2A TO220-5
- Quantity:
- Payment:
- Shipping:
Inventory:558
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Product details
Overview
UC2950TG3 from Texas Instruments is a monolithic half-bridge bipolar switch IC designed for high-current switching of inductive and capacitive loads in motor control and power conversion circuits. It delivers ±2.0A continuous output current, supports 8V–35V supply voltage, features TTL/CMOS-compatible inputs, and integrates high-speed internal flyback diodes for robust inductive load handling in chopper-controlled bipolar motor drivers.
For engineers reviewing the UC2950TG3 datasheet, UC2950TG3 pinout, UC2950TG3 application, or UC2950TG3 equivalent, key selection criteria include its tri-state operation, thermal shutdown protection, 300kHz switching capability, source/sink interlock logic, and TO-220 (KC) package with verified 5-pin terminal mapping for PCB layout and thermal design.
Technical Context
The UC2950TG3 implements independent source and sink switches with hardware-enforced interlock logic that disables the sink when the source is active-preventing shoot-through. Its internal flyback diodes are rated for ±2.0A forward current and exhibit 1.4–2.0V forward voltage, enabling efficient energy recirculation during inductive turn-off.
Switching performance is characterized by nanosecond-scale delays: source turn-on delay ≤500ns, sink turn-off delay ≤300ns, and cross-conduction spike duration ≤1.0µs under defined test conditions (VC = 12V, RL = 5Ω). Operation is specified across –20°C to +100°C ambient temperature with thermal shutdown activation at junction temperatures exceeding safe limits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 8V to 35V - supports wide-input industrial and automotive power rails without external regulation |
| Continuous Output Current | ±2.0A - enables direct driving of medium-power solenoids, relays, and small DC motors |
| Output Saturation Voltage | 1.2–2.0V at ±2.0A - defines conduction loss and thermal dissipation in on-state operation |
| Switching Frequency | Up to 300kHz - suitable for high-frequency chopper current control in motor drives |
| Operating Temperature | –20°C to +100°C - validated for use in enclosed industrial enclosures and under-hood automotive environments |
| Thermal Shutdown | Integrated - protects device during overload or inadequate heatsinking without external circuitry |
| Input Compatibility | TTL and CMOS - allows direct interface with microcontrollers, FPGAs, and logic families without level-shifting |
Pinout & Package
UC2950TG3 is housed in a 5-pin TO-220 (KC) package with exposed metal tab for thermal conduction and mechanical mounting. The package height is ≤16.51 mm, and pin 1 is identified by an optional chamfer or marking notch per JEDEC TO-220 standard.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (Tab) | Power Ground / Thermal Pad | Electrically connected to substrate ground; primary heat path to heatsink or PCB copper |
| Pin 2 | Source Drive Input | Active-high TTL/CMOS input controlling the high-side (source) output switch |
| Pin 3 | Supply Voltage (VC) | Main power rail input (8–35V); supplies both logic and output stages |
| Pin 4 | Output Terminal | Common drain/source node connecting to load; carries bidirectional switched current |
| Pin 5 | Sink Drive Input | Active-high TTL/CMOS input controlling the low-side (sink) output switch |
Key Features
| Feature | Design Value |
|---|---|
| Source or Sink 4.0A Peak | Supports short-duration surge loads (100ms, 10% duty cycle), enabling robust start-up current delivery |
| Tri-State Operation | Allows high-impedance output state via simultaneous low inputs-essential for bus sharing and multi-driver systems |
| Built-in Interlock Logic | Hardware prevents concurrent source/sink activation, eliminating shoot-through risk without external timing control |
| High-Current Internal Flyback Diodes | Rated for ±2.0A, 1.4–2.0V VF-eliminates need for external freewheeling diodes in most inductive applications |
| Low-Cost TO-220 Package | Standard through-hole footprint with proven thermal performance and mechanical stability for production assembly |
Applications
| Bipolar Stepper Motor Driver | DC Brush Motor H-Bridge Control |
|---|---|
Use Scenario: Driving unipolar or bipolar stepper motors in CNC positioning, 3D printer axes, or automated valve actuators using chopper current control. IC Role / Device Role / Timing Role: Half-bridge switch providing bidirectional current flow per winding; paired with second UC2950TG3 to form full H-bridge. Use Value: Enables precise microstepping with 300kHz PWM frequency and fast 200–500ns switching transitions, reducing torque ripple. | Use Scenario: Controlling direction and speed of small DC brush motors in robotics, power tools, and HVAC damper actuators. IC Role / Device Role / Timing Role: High-current half-bridge stage accepting logic-level direction signals and PWM speed commands. Use Value: Delivers ±2.0A continuous current with <2.0V saturation drop, minimizing I²R losses and thermal rise in compact designs. |
| Inductive Load Switching | Capacitive Load Buffering |
Use Scenario: Switching solenoids, relays, and electromagnetic valves in industrial PLC I/O modules and automotive body control units. IC Role / Device Role / Timing Role: Robust driver interfacing microcontroller GPIOs to high-energy inductive loads requiring flyback protection. Use Value: Integrated 1.4–2.0V forward-voltage flyback diodes suppress inductive kickback, eliminating external diode count and board space. | Use Scenario: Driving large gate capacitances of power MOSFETs or IGBTs in SMPS gate driver stages and inverters. IC Role / Device Role / Timing Role: High-slew-rate buffer delivering fast rise/fall times (<1µs) into >1nF capacitive loads. Use Value: Achieves 300kHz operation with <500ns source turn-on delay, supporting high-efficiency resonant and synchronous rectifier topologies. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar half-bridge switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| UC2950T | Identical electrical specs and pinout; same TO-220 (KC) package; differs only in tube packaging and part marking | No functional difference; used interchangeably in all UC2950TG3 applications | Select UC2950T when tube-packaged inventory or legacy BOM alignment is required |
| TPS28225DR | CMOS dual-channel gate driver (non-isolated), 4A peak, 12V max VDD, no integrated flyback diodes, no interlock logic | Requires external diodes and external shoot-through prevention; suited for MOSFET gate driving, not direct load switching | Choose TPS28225DR only when driving external N-channel MOSFETs in high-efficiency half-bridge configurations |
Compared with UC2950T (identical function, packaging variant) and TPS28225DR (gate-driver-only IC), the UC2950TG3 uniquely combines load-switching capability, built-in interlock, and integrated flyback diodes in a single TO-220 package-reducing component count and simplifying layout for direct-drive applications.
Availability
UC2950TG3 is available at Aetrix Electronics and suitable for industrial motor control, automotive body electronics, and power conversion systems requiring stable component supply, long-lifecycle support, and traceable sourcing.
Supply support for UC2950TG3 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, specializing in analog, embedded processing, and power management technologies with over 90 years of innovation in industrial, automotive, and consumer electronics.
The UC2950 product line was developed specifically for high-reliability, high-current switching in cost-sensitive industrial motion control and power interface applications-emphasizing integration, thermal robustness, and ease of use in non-isolated half-bridge topologies.
FAQ
What is the maximum continuous output current rating for UC2950TG3?
The UC2950TG3 is rated for ±2.0A continuous output current under specified thermal conditions with adequate heatsinking. This rating assumes operation within the –20°C to +100°C ambient temperature range and accounts for internal power dissipation limits. Exceeding this current without thermal derating may trigger thermal shutdown or cause permanent damage. Always verify junction temperature using the device's thermal resistance and actual PCB heatsinking in your final design.
Does UC2950TG3 require external flyback diodes when driving inductive loads?
No, UC2950TG3 does not require external flyback diodes for typical inductive loads. It integrates high-current internal flyback diodes rated for ±2.0A forward current and 1.4–2.0V forward voltage. These diodes provide energy recirculation during turn-off, protecting the output stage. External diodes may still be considered for extreme transient suppression or ultra-high-reliability redundancy, but they are not necessary for standard operation per the UC2950TG3 datasheet specifications.
How does the interlock feature work in UC2950TG3?
The UC2950TG3 implements hardware-based interlock logic that automatically disables the sink output when the source drive input (Pin 2) is asserted high. This prevents simultaneous conduction of both switches-a condition that would cause destructive shoot-through current. The interlock is intrinsic to the IC's internal architecture and requires no external timing components or firmware coordination, making it inherently reliable for safety-critical switching applications involving the UC2950TG3.
Can UC2950TG3 operate from a 5V supply?
No, UC2950TG3 cannot operate from a 5V supply. Its absolute minimum supply voltage (VC) is 8V, as specified in the Absolute Maximum Ratings table. Attempting to power the UC2950TG3 below 8V will result in improper logic operation, insufficient output drive strength, and potential latch-up or undefined behavior. For 5V-system compatibility, level-shifting or a dedicated 12V auxiliary rail is required to meet the UC2950TG3's operational supply range of 8V–35V.
What is the thermal shutdown threshold for UC2950TG3?
The UC2950TG3 incorporates thermal shutdown protection that activates when the internal junction temperature exceeds a safe operating limit-typically around 150°C to 175°C, consistent with TI's standard monolithic power IC thermal design practices. Once triggered, the device disables both output switches until the junction cools sufficiently. The exact trip point is not published in the datasheet but is designed to prevent irreversible damage under sustained overload or inadequate heatsinking conditions affecting the UC2950TG3.
UC2950TG3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- TO-220-5
- Packaging:
- Tube
- Product Status:
- Active
- Output Configuration:
- Half Bridge
- Applications:
- General Purpose
- Interface:
- On/Off
- Load Type:
- Inductive, Capacitive
- Technology:
- Bipolar
- Rds On (Typ):
- -
- Current - Output / Channel:
- 2A
- Current - Peak Output:
- 4A
- Voltage - Supply:
- 8V ~ 35V
- Voltage - Load:
- 8V ~ 35V
- Operating Temperature:
- -20°C ~ 100°C (TJ)
- Grade:
- -
- Qualification:
- -
- Features:
- 5V Regulated Output
- Fault Protection:
- Over Temperature
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220-5
UC2950TG3 FAQ
1.How can I place an order for UC2950TG3 through Aetrix?
Please submit a Request for Quotation (RFQ) for UC2950TG3 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 UC2950TG3 reliable?
The price and inventory of UC2950TG3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UC2950TG3 is usually 5 days.
3.What payment methods are accepted for UC2950TG3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UC2950TG3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UC2950TG3?
UC2950TG3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UC2950TG3 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 UC2950TG3?
For technical support, including UC2950TG3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UC2950TG3 requirements.
6.How does Aetrix verify that UC2950TG3 is sourced from the original manufacturer or authorized distributors?
All UC2950TG3 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 UC2950TG3 meets industry standards.
7.What is the process for return or replacement of UC2950TG3?
All UC2950TG3 units undergo pre-shipment inspection (PSI). If there is an issue with UC2950TG3, 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 UC2950TG3 part is unused and in its original packaging.
Return procedure for UC2950TG3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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