TDA7274 STMicroelectronics Integrated Circuit (Dual-In-Line Packages) In Stock
STMicroelectronics TDA7274 is a 3-phase brushless DC motor controller IC in an 8-pin DIP package, operating from 1.8 V to 6 V supply with up to 0.7 A output current, designed for compact sensorless BLDC motor drive applications.
- Manufacturer
- STMicroelectronics
- Package
- Dual-In-Line Packages
- Pin Count
- 8
- Lifecycle
- OBSOLETE
- Datasheet
- TDA7274 Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -40.0°C to 150.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of TDA7274?
- Wide 1.8 V to 6 V operating voltage range enables direct operation from single-cell Li-ion, NiMH battery packs, or 3.3 V and 5 V logic supply rails without a dedicated motor voltage regulator
- Integrated 3-phase brushless DC motor controller with up to 0.7 A peak output current in a compact 8-pin 0.3 inch DIP package minimizes external component count
- Single-function monolithic design provides all commutation logic for 3-phase BLDC motors in a plastic epoxy DIP8 body suitable for through-hole prototyping and low-volume production
What is TDA7274 used for?
TDA7274 is used in small cooling fans, optical disc drive spindle motors, and portable appliance motors where the 1.8 V to 6 V supply range matches rechargeable battery packs and 5 V USB power directly. Its integrated 3-phase commutation logic eliminates external discrete transistor arrays for driving BLDC motors drawing up to 0.7 A, simplifying BOM for compact consumer electronics. The 8-pin DIP package also makes TDA7274 a practical choice for educational motor-control development boards and proof-of-concept rigs using standard breadboard prototyping.
What are the specifications of TDA7274?
| YTEOL | 0 |
| Analog IC - Other Type | 3-PHASE BRUSHLESS DC MOTOR CONTROLLER |
| JESD-30 Code | R-PDIP-T8 |
| JESD-609 Code | e0 |
| Number of Functions | 1 |
| Output Current-Max | 0.7A |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | DIP8,.3 |
| Package Shape | RECTANGULAR |
| Package Style | IN-LINE |
| Qualification Status | Not Qualified |
| Supply Current-Max (Isup) | 6mA |
| Supply Voltage-Max (Vsup) | 6V |
| Supply Voltage-Min (Vsup) | 1.8V |
| Supply Voltage-Nom (Vsup) | 3V |
| Surface Mount | NO |
| Technology | BIPOLAR |
| Temperature Grade | AUTOMOTIVE |
| Terminal Finish | Tin/Lead (Sn/Pb) |
| 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 TDA7274 datasheet?
TDA7274 Datasheet DownloadOfficial datasheet from STMicroelectronics
What are equivalent replacements for TDA7274?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What supply voltage range does TDA7274 support and which battery chemistries is it compatible with?
TDA7274 operates from 1.8 V to 6 V, covering single-cell Li-ion (3.7 V nominal), NiMH packs, and 5 V USB or regulated supply rails. This wide range means the motor controller remains operational as a Li-ion cell discharges from 4.2 V fully charged down to approximately 3.0 V, extending usable motor run time in battery-powered fans and disc drives.
What is the maximum output current of TDA7274 and which motor sizes does it suit?
TDA7274 delivers up to 0.7 A peak output current across its 3-phase output drivers. This current capacity is appropriate for small BLDC motors in the 1 W to 3 W range, such as 40 mm to 80 mm axial cooling fans, CD/DVD spindle motors, and compact pump impellers, but is insufficient for larger motors drawing several amperes, which would require external power FETs or a higher-current BLDC driver IC.
How does TDA7274 simplify the drive circuit for a 3-phase BLDC fan compared to a discrete transistor solution?
A discrete 3-phase BLDC drive requires 6 transistors with gate resistors, bootstrap capacitors, and logic-level commutation sequencing. TDA7274 integrates all commutation logic and output stage in a single 8-pin DIP, reducing the external component count to essentially a supply bypass capacitor and the motor windings, cutting design time and PCB area for small BLDC fan controllers operating from 1.8 V to 6 V rails.
What package does TDA7274 use and how does it suit prototyping and low-volume production?
TDA7274 ships in an 8-pin DIP plastic epoxy package with a 0.3 inch (7.62 mm) row spacing. This through-hole format inserts directly into standard breadboards and 0.1 inch pitch prototype sockets, enabling rapid hardware iteration without SMT reflow equipment. Wave soldering or manual soldering on 0.3 inch DIP pads is straightforward for low-volume production runs of fan controllers and motor development boards.
When is TDA7274 end-of-life a concern, and what should designers consider for new designs?
TDA7274 carries a YTEOL (years to end-of-life) value of 0, indicating the device is at or near end-of-life. Designers starting new motor-control projects should evaluate alternative 3-phase BLDC controllers with longer lifecycle commitments, such as more recent STMicroelectronics STSPIN or L6234 series devices, which offer higher output currents above 1 A and SMT packages better suited to modern high-density PCB assembly.
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Why Buy from FindMyChip
About STMicroelectronics
STMicroelectronics is a global semiconductor leader serving customers across the spectrum of electronics applications. ST's products are found in a wide range of applications including automotive, industrial, personal electronics, and communications.
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