UCC3813PWTR-1G4 Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
UCC3813PWTR-1G4 is a low-power BiCMOS current-mode PWM controller operating from 8.2 V to 12 V supply in an 8-pin SOIC package, designed for cost-effective flyback and forward converter designs. It features peak current limiting, oscillator, and gate drive in a compact footprint with less than 1 mA startup current. Available in stock with worldwide shipping for power supply and AC-DC converter designs.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 8
- Lifecycle
- OBSOLETE
- Datasheet
- UCC3813PWTR-1G4 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 UCC3813PWTR-1G4?
- Current-mode PWM control with peak current limiting for inherent cycle-by-cycle protection
- Ultra-low startup current under 1 mA for efficient standby power in off-line converters
- 8.2 V to 12 V input voltage range with BiCMOS process for low operating power
- Integrated gate driver, oscillator, and error amplifier in 8-pin SOIC package
- Economy series optimized for cost-sensitive flyback and forward converter topologies
What is UCC3813PWTR-1G4 used for?
UCC3813PWTR-1G4 is commonly used in low-power AC-DC adapters, auxiliary power supplies, and battery chargers where minimal standby power and compact size are essential. The current-mode architecture simplifies loop compensation and provides inherent cycle-by-cycle overcurrent protection in offline flyback designs up to approximately 20 W.
What are the specifications of UCC3813PWTR-1G4?
| Pbfree Code | Yes |
| YTEOL | 0 |
| Analog IC - Other Type | SWITCHING CONTROLLER |
| Control Mode | CURRENT-MODE |
| Control Technique | PULSE WIDTH MODULATION |
| Input Voltage-Max | 12V |
| Input Voltage-Min | 8.2V |
| Input Voltage-Nom | 10V |
| JESD-30 Code | R-PDSO-G8 |
| JESD-609 Code | e4 |
| Number of Functions | 1 |
| Output Current-Max | 1A |
| Output Voltage-Max | 5.075V |
| Output Voltage-Min | 4.925V |
| Output Voltage-Nom | 5V |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | TSSOP8,.25 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, THIN PROFILE, SHRINK PITCH |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Supply Current-Max (Isup) | 1.2mA |
| Surface Mount | YES |
| Switcher Configuration | SINGLE |
| Switching Frequency-Max | 52kHz |
| Technology | BICMOS |
| Temperature Grade | COMMERCIAL |
| Terminal Finish | NICKEL PALLADIUM GOLD |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.65mm |
| 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 |
Where can I find the UCC3813PWTR-1G4 datasheet?
UCC3813PWTR-1G4 Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for UCC3813PWTR-1G4?
Compatible alternatives and drop-in replacements for UCC3813PWTR-1G4:
Switching Controller, Current-mode, 1A, 1000kHz Switching Freq-Max, BICMOS, PDSO8
Switching Controller, Current-mode, 1A, 52kHz Switching Freq-Max, BICMOS, PDSO8
Switching Controller, Current-mode, 1A, 52kHz Switching Freq-Max, BICMOS, PDSO8
Frequently Asked Questions
What input voltage range does UCC3813PWTR-1G4 accept in flyback converter designs?
UCC3813PWTR-1G4 operates with an input voltage from 8.2 V to 12 V, with a nominal 10 V bias supply, making it compatible with auxiliary winding-powered bias rails commonly used in offline AC-DC flyback converters.
How does current-mode control in UCC3813PWTR-1G4 simplify compensation compared to voltage-mode PWM controllers?
Current-mode control eliminates the double pole from the output LC filter in the control loop, reducing the compensation network to a single-pole design that is easier to stabilize and provides faster transient response in flyback and forward converters operating at switching frequencies up to 1 MHz.
Can UCC3813PWTR-1G4 meet standby power regulations for AC-DC adapters under 1 W no-load?
Yes. The UCC3813PWTR-1G4 draws less than 1 mA during startup and operates in burst mode at light loads, enabling total standby input power well below 1 W in a properly designed flyback converter, helping meet ENERGY STAR Level VI and EU CoC Tier 2 requirements.
Which package and pin count does UCC3813PWTR-1G4 use, and how does that affect PCB layout in tight designs?
The device comes in an 8-pin TSSOP package with a 0.65 mm pin pitch, occupying a footprint of approximately 3 mm × 4.4 mm, allowing compact power supply designs that fit within the limited PCB area of USB chargers and small AC adapters.
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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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