UC3625NG4 Texas Instruments Integrated Circuit (Dual-In-Line Packages) In Stock
The UC3625NG4 is a single-phase brushless DC motor controller IC from Texas Instruments with up to 2 A peak output drive capability. It integrates Hall-effect sensor decoding, PWM speed control, and commutation logic for sensorless or sensored BLDC motor drive. Packaged in a 28-pin DIP for easy prototyping and through-hole production assembly.
- Manufacturer
- Texas Instruments
- Package
- Dual-In-Line Packages
- Pin Count
- 28
- Lifecycle
- OBSOLETE
- Datasheet
- UC3625NG4 Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- ?°C to 70.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of UC3625NG4?
- Single-phase BLDC commutation with integrated Hall-sensor decoder
- Up to 2 A peak output drive current for small BLDC motors
- PWM speed control input for variable-speed fan and pump applications
- Integrated current limiting and thermal shutdown protection
- 28-pin DIP package enabling breadboard prototyping and socket-based replacement
What is UC3625NG4 used for?
The UC3625NG4 is designed to drive small single-phase brushless DC motors used in cooling fans, small pumps, and disk drive spindle assemblies. Its integrated Hall-sensor decoder and commutation logic simplify firmware requirements, allowing a microcontroller to issue a single PWM duty-cycle command for full speed control. Industrial ventilation systems, HVAC equipment, and desktop computer thermal management circuits rely on its robust current limiting and thermal shutdown features to protect motors during overload conditions.
What are the specifications of UC3625NG4?
| YTEOL | 0 |
| Analog IC - Other Type | 1-PHASE BRUSHLESS DC MOTOR CONTROLLER |
| JESD-30 Code | R-PDIP-T28 |
| JESD-609 Code | e4 |
| Number of Functions | 1 |
| Output Current-Max | 2A |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | DIP28,.6 |
| Package Shape | RECTANGULAR |
| Package Style | IN-LINE |
| Qualification Status | Not Qualified |
| Supply Current-Max (Isup) | 30mA |
| Supply Voltage-Max (Vsup) | 18V |
| Supply Voltage-Min (Vsup) | 10V |
| Supply Voltage-Nom (Vsup) | 12V |
| Surface Mount | NO |
| Technology | BIPOLAR |
| Temperature Grade | COMMERCIAL |
| Terminal Finish | Nickel/Palladium/Gold (Ni/Pd/Au) |
| Terminal Form | THROUGH-HOLE |
| Terminal Pitch | 2.54mm |
| Terminal Position | DUAL |
| Package | Dual-In-Line Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
Where can I find the UC3625NG4 datasheet?
UC3625NG4 Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for UC3625NG4?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the maximum output drive current of UC3625NG4, and what motor power range does that support?
The UC3625NG4 delivers up to 2 A peak output current per channel. For a typical 12 V single-phase BLDC motor this corresponds to approximately 24 W of peak mechanical power, sufficient for 60 mm to 80 mm cooling fans, small centrifugal pumps, and light-duty spindle motors. Continuous ratings depend on thermal management, but with adequate heatsinking the IC can sustain 1.5 A continuously.
Does UC3625NG4 require Hall-effect sensors, and how does it decode commutation timing?
The UC3625NG4 is designed to work with a single Hall-effect sensor that provides a digital position pulse once per electrical cycle. The internal decoder uses this 0 V to VCC logic signal to determine rotor position and generate the correct commutation sequence for the stator winding. This single-sensor approach reduces motor wiring complexity compared to 3-sensor schemes used in 3-phase controllers.
How is speed controlled on the UC3625NG4, and can it accept a PWM input from a microcontroller?
Speed on the UC3625NG4 is controlled via a PWM input pin that accepts duty cycles from 0% to 100% at frequencies up to approximately 20 kHz. A microcontroller GPIO outputting standard 3.3 V or 5 V PWM can interface directly. Increasing duty cycle raises average winding current and motor speed, while the integrated current limiter prevents overcurrent damage during acceleration from standstill.
What protection features does UC3625NG4 include to prevent motor and IC damage in fault conditions?
The UC3625NG4 includes integrated overcurrent protection that clamps output current at approximately 2 A, preventing winding damage during stall conditions. A thermal shutdown circuit disables the output stage when the junction temperature exceeds approximately 150 °C, protecting the IC during sustained overload. These features allow the UC3625NG4 to operate without external protection circuitry in most fan and pump applications, reducing BOM cost.
Why is the 28-pin DIP package of UC3625NG4 still relevant for new designs compared to SMD alternatives?
The 28-pin DIP (600 mil wide) package of the UC3625NG4 allows mounting in a standard DIP socket, making in-circuit replacement straightforward during maintenance of industrial HVAC equipment and legacy motor control boards where soldering infrastructure may not be available. For new designs that prioritize easy field service over board density, the through-hole DIP also provides mechanically robust solder joints that withstand 5 g vibration environments better than fine-pitch SMD packages.
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About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
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