UCC3809PW-2G4 Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
The UCC3809PW-2G4 is a current-mode PWM secondary-side controller designed for synchronous rectification and secondary regulation in isolated DC-DC converters, operating from 10 V to 15 V in a compact 8-pin TSSOP package. It simplifies output voltage regulation without an optocoupler feedback loop. Available from stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 8
- Lifecycle
- OBSOLETE
- Datasheet
- UCC3809PW-2G4 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 UCC3809PW-2G4?
- Current-mode PWM control on the secondary side enables fast transient response and inherent cycle-by-cycle current limiting
- Secondary-side placement eliminates optocoupler feedback loop, reducing component count and improving regulation accuracy
- Compact 8-pin TSSOP package fits space-constrained DC-DC converter designs in industrial and telecom power supplies
- 10 V to 15 V bias supply range integrates easily with auxiliary windings in standard isolated flyback and forward converter designs
What is UCC3809PW-2G4 used for?
The UCC3809PW-2G4 is used in isolated DC-DC converters where secondary-side control provides tighter output regulation and faster load-transient response than primary-side solutions with optocoupler feedback. It is well suited for telecom quarter-brick power modules, distributed power architectures, and industrial isolated point-of-load converters. The device is also used in synchronous rectifier gate drive control to improve efficiency in high-current low-voltage output stages.
What are the specifications of UCC3809PW-2G4?
| 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-PDSO-G8 |
| JESD-609 Code | e4 |
| Number of Functions | 1 |
| Output Current-Max | 0.8A |
| 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) | 0.9mA |
| Surface Mount | YES |
| Switcher Configuration | SINGLE |
| Switching Frequency-Max | 1000kHz |
| Technology | BCDMOS |
| 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 UCC3809PW-2G4 datasheet?
UCC3809PW-2G4 Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for UCC3809PW-2G4?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the control mode used by the UCC3809PW-2G4?
The UCC3809PW-2G4 uses current-mode pulse-width modulation control, which provides inherent cycle-by-cycle peak current limiting, simplifies compensation loop design, and offers fast response to input voltage and load transients compared to voltage-mode control architectures.
Why would a designer use secondary-side control with the UCC3809PW-2G4?
Secondary-side control eliminates the optocoupler and TL431 reference circuit that primary-side controllers require for output feedback, reducing component count and PCB area. It also improves regulation accuracy and transient performance because the control loop directly senses and responds to the output voltage without the bandwidth and gain limitations of an optocoupler.
What input voltage does the UCC3809PW-2G4 require?
The UCC3809PW-2G4 requires a bias supply voltage between 10 V and 15 V (nominal 12 V), which can be derived from a secondary-winding auxiliary supply in the converter. This voltage range is standard for control IC bias in off-line and bus-input isolated converter designs.
What package and pin count does the UCC3809PW-2G4 use?
The UCC3809PW-2G4 is housed in an 8-pin TSSOP (PW suffix) package with a very small footprint, suitable for high-density PCB designs in power modules and compact converter boards. The G4 suffix indicates tape-and-reel shipment with RoHS-compliant lead-free construction.
What converter topologies is the UCC3809PW-2G4 compatible with?
The UCC3809PW-2G4 is compatible with flyback, forward, and resonant converter topologies where secondary-side control is employed. It is most commonly used in flyback converters with synchronous rectification and in forward converters requiring tight output voltage regulation across wide load ranges in telecom and industrial power supply applications.
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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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