UCC3809N-1G4 Texas Instruments Integrated Circuit (Dual-In-Line Packages) In Stock
The UCC3809N-1G4 is a current-mode PWM secondary-side controller from Texas Instruments in an 8-pin PDIP package. It operates on a 10V to 15V supply with pulse-width modulation control for regulated power conversion. Available from stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Dual-In-Line Packages
- Pin Count
- 8
- Lifecycle
- OBSOLETE
- Datasheet
- UCC3809N-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
Key Features
- Current-mode PWM control technique providing inherent cycle-by-cycle current limiting and improved transient response
- Secondary-side control architecture enabling precise output regulation in isolated power supply designs
- Wide input voltage range of 10V to 15V (nominal 12V) suiting standard bias supply configurations
- Compact 8-pin PDIP package simplifying PCB layout for cost-effective switching power supply designs
Applications
The UCC3809N-1G4 is designed for secondary-side PWM regulation in isolated switching power supplies, including flyback, forward, and resonant converter topologies. Its current-mode control provides fast load transient response and built-in current limiting, making it well-suited for telecom power supplies, industrial DC-DC converters, and AC-DC adapters. The device is commonly used in applications requiring tight output voltage regulation with optocoupler feedback in isolated power supply architectures.
Specifications
| Pbfree Code | Yes |
| YTEOL | 0 |
| Analog IC - Other Type | SWITCHING CONTROLLER |
| Control Mode | CURRENT-MODE |
| Control Technique | PULSE WIDTH MODULATION |
| Input Voltage-Max | 15V |
| Input Voltage-Min | 10V |
| Input Voltage-Nom | 12V |
| JESD-30 Code | R-PDIP-T8 |
| JESD-609 Code | e4 |
| Number of Functions | 1 |
| Output Current-Max | 0.8A |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | DIP8,.3 |
| Package Shape | RECTANGULAR |
| Package Style | IN-LINE |
| Qualification Status | Not Qualified |
| Screening Level | TS 16949 |
| Surface Mount | NO |
| Switcher Configuration | SINGLE |
| Switching Frequency-Max | 1000kHz |
| Technology | BCDMOS |
| Temperature Grade | COMMERCIAL |
| Terminal Finish | NICKEL PALLADIUM GOLD |
| 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 |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the UCC3809N-1G4 and what control method does it use?
The UCC3809N-1G4 is a current-mode PWM secondary-side switching controller from Texas Instruments. It uses pulse-width modulation with current-mode control, which provides cycle-by-cycle current limiting, simplified loop compensation, and inherently better transient response compared to voltage-mode control. It operates from a 10V to 15V supply and is housed in an 8-pin PDIP package.
What is the input voltage range for the UCC3809N-1G4?
The UCC3809N-1G4 operates with a minimum input voltage of 10V, a maximum of 15V, and a nominal operating voltage of 12V. This range is well-matched to standard bias supply rails in switching power supplies, making it easy to power directly from an auxiliary winding or regulated 12V supply rail.
What package does the UCC3809N-1G4 use and is it RoHS compliant?
The UCC3809N-1G4 is housed in an 8-pin Plastic Dual In-Line Package (PDIP) with JESD-30 code R-PDIP-T8. It is RoHS-compliant and lead-free, with JESD-609 code e4 confirming Pb-free status. The through-hole PDIP package is easy to hand-solder and suitable for prototype and low-volume production.
What topologies is the UCC3809N-1G4 suitable for?
The UCC3809N-1G4 is suitable for isolated power supply topologies including flyback, forward converter, and resonant converter designs where secondary-side regulation with optocoupler feedback is required. Its current-mode PWM architecture is especially effective in continuous conduction mode (CCM) and discontinuous conduction mode (DCM) flyback designs used in telecom and industrial power supplies.
What is the lifecycle status of the UCC3809N-1G4?
The UCC3809N-1G4 has a YTEOL (Years to End of Life) value of 0, which indicates the product is at or near end-of-life with Texas Instruments. Engineers designing new systems should verify current availability from authorized distributors and consider alternative or replacement controllers for long-term production designs. Existing stock may still be purchasable in limited quantities.
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