UC2854ADWTR Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
The UC2854ADWTR is an enhanced high power factor preregulator IC from Texas Instruments that implements average current-mode PWM control to achieve near-unity power factor correction in AC-DC power supplies, operating from 10-20V bias in a 16-pin SOIC package. It provides integrated boost PFC control with multiplier, error amplifier, and gate drive functions. Available in tape-and-reel from authorized distributors with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 16
- Lifecycle
- ACTIVE
- Datasheet
- UC2854ADWTR Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $3.3687(MOQ 25)
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of UC2854ADWTR?
- Average current-mode PWM control achieves near-unity power factor correction, minimizing AC line harmonic distortion to meet IEC 61000-3-2 standards
- Integrated analog multiplier, voltage error amplifier, and current amplifier reduce external component count in boost PFC preregulator designs
- 10V to 20V bias supply range (nominal 18V) suits auxiliary rail operation in offline AC-DC power conversion systems
- 16-pin SOIC (R-PDSO-G16) tape-and-reel packaging supports high-volume automated assembly in industrial and consumer power supply production
What is UC2854ADWTR used for?
The UC2854ADWTR is the core control IC in active power factor correction front-end stages for offline AC-DC power supplies used in computers, industrial motor drives, telecommunications rectifiers, and medical power equipment. Its average current-mode boost PFC architecture shapes the AC input current to follow the sinusoidal line voltage, reducing reactive power and harmonic content to comply with EN61000-3-2 and similar international regulations. It is also used in UPS systems and programmable AC power sources requiring high efficiency and low total harmonic distortion from the AC mains.
What are the specifications of UC2854ADWTR?
| Pbfree Code | Yes |
| Date Of Intro | 1992-12-01 |
| YTEOL | 15 |
| Analog IC - Other Type | POWER FACTOR CONTROLLER |
| Control Mode | CURRENT-MODE |
| Control Technique | PULSE WIDTH MODULATION |
| Input Voltage-Max | 20V |
| Input Voltage-Min | 10V |
| Input Voltage-Nom | 18V |
| JESD-30 Code | R-PDSO-G16 |
| JESD-609 Code | e4 |
| Number of Functions | 1 |
| Output Current-Max | 1.5A |
| Output Voltage-Max | 7.6V |
| Output Voltage-Min | 7.4V |
| Output Voltage-Nom | 7.5V |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP16,.4 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Supply Current-Max (Isup) | 12mA |
| Supply Voltage-Max (Vsup) | 20V |
| Supply Voltage-Nom (Vsup) | 18V |
| Surface Mount | YES |
| Switcher Configuration | BOOST |
| Switching Frequency-Max | 200kHz |
| Technology | BIPOLAR |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | Nickel/Palladium/Gold (Ni/Pd/Au) |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 2 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.90 |
Where can I find the UC2854ADWTR datasheet?
UC2854ADWTR Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for UC2854ADWTR?
Compatible alternatives and drop-in replacements for UC2854ADWTR:
Power Factor Controller, Current-mode, 1.5A, 200kHz Switching Freq-Max, BIPolar, PDSO16
Frequently Asked Questions
What is the primary function of the UC2854ADWTR?
The UC2854ADWTR is a power factor correction (PFC) controller that uses average current-mode PWM control to shape the AC input current of boost PFC preregulator circuits. It forces the input current to track the sinusoidal line voltage waveform, achieving near-unity power factor and reducing harmonic distortion to comply with IEC 61000-3-2 and similar standards.
What control mode does the UC2854ADWTR use and why is it advantageous?
The UC2854ADWTR implements average current-mode PWM control, where the average inductor current is regulated to follow a sinusoidal reference derived from the line voltage. This approach provides inherently lower harmonic distortion, better noise immunity, and more stable control loop dynamics compared to peak current-mode PFC controllers, especially in high-power applications.
What supply voltage does the UC2854ADWTR require?
The UC2854ADWTR requires a bias supply voltage between 10V and 20V, with a nominal operating voltage of 18V. This auxiliary supply is typically derived from the power supply's transformer auxiliary winding or a dedicated bias regulator, making it compatible with standard offline AC-DC converter auxiliary rail designs.
What package and ordering format does the UC2854ADWTR use?
The UC2854ADWTR is packaged in a 16-pin SOIC (JESD-30 code R-PDSO-G16) surface-mount package. The TR suffix indicates tape-and-reel packaging, which is optimized for high-volume automated SMT pick-and-place assembly. It is Pb-free and RoHS compliant with a projected end-of-life year of 2007 from its 1992 introduction date (YTEOL: 15).
What power supply applications is the UC2854ADWTR designed for?
This IC targets the active PFC front-end stage of offline AC-DC power supplies in desktop computers, servers, industrial variable-speed drives, telecom rectifiers, UPS systems, and medical power equipment. Regulatory requirements in these markets mandate active PFC to limit harmonic current injection into the AC grid, making a dedicated PFC controller like the UC2854ADWTR essential for compliance and efficiency.
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Why Buy from FindMyChip
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.
More from Texas Instruments
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 25+ | $4.2100 | $105.25 |
| 100+ | $3.8269 | $382.69 |
| 250+ | $3.6796 | $919.91 |
| 2000+ | $3.3687 | $6737.46 |
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