UC3855ADWTRG4 Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
The UC3855ADWTRG4 is an average current-mode power factor correction controller IC from Texas Instruments designed for boost PFC converters. It supports 15V to 35V input voltage range with PWM control technique for high power factor. Available in 20-pin SOIC package with RoHS-compliant e4 lead-free construction for worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 20
- Lifecycle
- OBSOLETE
- Datasheet
- UC3855ADWTRG4 Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- ?°C to 70.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Average current-mode control delivers superior power factor correction performance compared to peak current-mode designs
- Wide input voltage range of 15V to 35V with 18V nominal supports diverse power supply designs
- Pulse Width Modulation (PWM) control technique enables precise regulation of boost PFC stage output
- 20-pin SOIC package with RoHS e4 compliance provides easy PCB integration and green manufacturing compatibility
Applications
The UC3855ADWTRG4 is primarily used in AC-DC power supply designs requiring high power factor correction, such as desktop computer power supplies, industrial power converters, and LED lighting drivers. Its average current-mode control makes it ideal for boost PFC pre-regulators in switch-mode power supplies operating from universal AC mains. Engineers also use it in UPS systems and motor drive applications where compliance with power factor standards such as IEC 61000-3-2 is required.
Specifications
| Pbfree Code | Yes |
| YTEOL | 0 |
| Analog IC - Other Type | POWER FACTOR CONTROLLER |
| Control Mode | CURRENT-MODE |
| Control Technique | PULSE WIDTH MODULATION |
| Input Voltage-Max | 35V |
| Input Voltage-Min | 15V |
| Input Voltage-Nom | 18V |
| JESD-30 Code | R-PDSO-G20 |
| JESD-609 Code | e4 |
| Number of Functions | 1 |
| Output Current-Max | 1.5A |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP20,.4 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Supply Current-Max (Isup) | 25mA |
| Surface Mount | YES |
| Switcher Configuration | BOOST |
| Switching Frequency-Max | 500kHz |
| Technology | BIPOLAR |
| Temperature Grade | COMMERCIAL |
| Terminal Finish | NICKEL PALLADIUM GOLD |
| 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 | 8542.39.00.60 |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for UC3855ADWTRG4:
Power Factor Controller, Current-mode, 1.5A, 500kHz Switching Freq-Max, BIPolar, PDSO20
Rochester Electronics LLC 1.5A POWER FACTOR CONTROLLER, 500kHz SWITCHING FREQ-MAX, PDSO20, GREEN, PLASTIC, SOIC-20
Power Factor Controller, Current-mode, 1.5A, 500kHz Switching Freq-Max, BIPolar, PDSO20
Frequently Asked Questions
What is the input voltage range of the UC3855ADWTRG4?
The UC3855ADWTRG4 operates with an input voltage range of 15V minimum to 35V maximum, with a nominal operating voltage of 18V. This range makes it compatible with a variety of power supply architectures including boost PFC pre-regulators that supply intermediate DC bus voltages in switch-mode power systems.
What control mode does the UC3855ADWTRG4 use for power factor correction?
The UC3855ADWTRG4 uses average current-mode control combined with Pulse Width Modulation (PWM) to achieve power factor correction. Average current-mode control provides lower harmonic distortion and more accurate shaping of input current waveform compared to peak current-mode methods, resulting in improved power factor performance.
What package does the UC3855ADWTRG4 come in, and is it RoHS compliant?
The UC3855ADWTRG4 is housed in a 20-pin Small Outline IC (SOIC) package, identified by JESD-30 code R-PDSO-G20. It carries JEDEC JESD-609 code e4, confirming it is fully RoHS-compliant and lead-free. The Pbfree Code is marked as Yes, making it suitable for use in environmentally restricted applications globally.
What types of applications use the UC3855ADWTRG4?
The UC3855ADWTRG4 is used in AC-DC power supplies, UPS systems, industrial motor drives, and lighting ballasts that require high power factor correction. Its average current-mode PWM control makes it well-suited for boost PFC stage designs in systems that must comply with IEC 61000-3-2 harmonic current standards for equipment connected to the AC mains.
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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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