UCC3813PW-3G4 Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
UCC3813PW-3G4 is a BiCMOS current-mode PWM controller operating from 4 V to 12 V supply with 1 A peak gate drive output and switching frequency up to 1000 kHz, packaged in an 8-pin TSSOP for low-power offline and isolated converter designs. It integrates oscillator, error amplifier, and cycle-by-cycle current limit with very low startup current. Available in stock globally for cost-efficient flyback and forward converter applications.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 8
- Lifecycle
- OBSOLETE
- Datasheet
- UCC3813PW-3G4 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
- Current-mode PWM control with cycle-by-cycle peak current limiting for inherent fault protection
- 1 A peak source/sink gate driver output for fast MOSFET switching up to 1000 kHz
- Wide 4 V to 12 V input range with ultra-low startup current under 1 mA
- Integrated oscillator, error amplifier, and soft-start in an 8-pin TSSOP package
- BiCMOS process delivers low operating power for energy-efficient standby in AC-DC converters
Applications
UCC3813PW-3G4 is used in low-power flyback converters for AC-DC wall adapters, auxiliary power supplies, and battery chargers up to approximately 30 W where cycle-by-cycle protection and minimal standby consumption are essential. Its 4 V to 12 V input range accommodates both directly-powered and auxiliary-winding-biased bias supply rails in switch-mode power designs.
Specifications
| 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 | 4V |
| 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 | 4.06V |
| Output Voltage-Min | 3.94V |
| Output Voltage-Nom | 4V |
| 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 | 36kHz |
| 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 |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for UCC3813PW-3G4:
Switching Controller, Current-mode, 1A, 36kHz Switching Freq-Max, BICMOS, PDSO8
Switching Controller, Current-mode, 1A, 36kHz Switching Freq-Max, BICMOS, PDSO8
Frequently Asked Questions
What switching frequency can UCC3813PW-3G4 achieve in a compact flyback converter design?
UCC3813PW-3G4 supports switching frequencies up to 1000 kHz, allowing designers to use smaller transformers and output capacitors, reducing the total magnetics volume in USB chargers and auxiliary supplies compared to 100 kHz designs.
How does the 1 A peak gate drive of UCC3813PW-3G4 affect MOSFET switching losses?
With 1 A peak source and sink capability, UCC3813PW-3G4 can charge and discharge the gate of a 2 nF MOSFET in under 10 ns, minimizing overlap between drain voltage and current to reduce switching losses in converters operating at 500 kHz to 1 MHz.
How does UCC3813PW-3G4 differ from UCC3813PWTR-1G4 in supply voltage range for different converter bias rails?
UCC3813PW-3G4 accepts a minimum input of 4 V versus 8.2 V for UCC3813PWTR-1G4, making it compatible with lower bias winding voltages and enabling startup from a wider range of auxiliary supply configurations in offline flyback converters.
Does UCC3813PW-3G4 comply with RoHS requirements for export to European markets?
Yes. The UCC3813PW-3G4 is RoHS-compliant and lead-free, confirmed by the Pb-free code in its datasheet, allowing it to be used in products sold in the EU under RoHS Directive 2011/65/EU without restriction.
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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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