UCC2813PWTR-5 Texas Instruments (SOIC) In Stock
UCC2813PWTR-5 is a current-mode PWM switching controller by Texas Instruments with 4 V to 11 V input range and internal 5 V reference in an 8-pin SOIC package. Key specs: current-mode control, 10 V nominal input, 500 kHz capable switching frequency. From stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- —
- Pin Count
- 8
- Lifecycle
- ACTIVE
- Datasheet
- UCC2813PWTR-5 Datasheet PDF
- Price
- From $0.8370(MOQ 1)
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Current-mode PWM control with internal slope compensation provides inherent cycle-by-cycle overcurrent limiting and simplified loop compensation in boost and flyback designs
- 4 V to 11 V input voltage range with 10 V nominal operation suits 12 V bus power supplies and battery-powered converter applications
- 8-pin SOIC package with integrated 5 V reference and soft-start reduces external component count for compact off-line and DC/DC converter designs
Applications
The UCC2813PWTR-5 is used as the primary control IC in isolated flyback converters, boost regulators, and discontinuous-mode off-line power supplies for industrial and consumer electronics. Its current-mode architecture simplifies compensation design and improves transient response compared to voltage-mode controllers, making it suitable for battery chargers, LED drivers, and auxiliary power supplies in telecom equipment. The 8-pin SOIC and integrated 5 V reference streamline compact PCB layouts requiring minimal external passives.
Specifications
| Pbfree Code | Yes |
| YTEOL | 15 |
| Analog IC - Other Type | SWITCHING CONTROLLER |
| Control Mode | CURRENT-MODE |
| Control Technique | PULSE WIDTH MODULATION |
| Input Voltage-Max | 11V |
| 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) | 30mA |
| Supply Voltage-Max (Vsup) | 11V |
| Supply Voltage-Min (Vsup) | 4.1V |
| Supply Voltage-Nom (Vsup) | 10V |
| Surface Mount | YES |
| Switcher Configuration | SINGLE |
| Switching Frequency-Max | 1000kHz |
| Technology | BICMOS |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | Nickel/Palladium/Gold (Ni/Pd/Au) |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.65mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 2 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.90 |
| Country of Origin | Malaysia, Thailand |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for UCC2813PWTR-5:
Switching Controller, Current-mode, 1A, 1000kHz Switching Freq-Max, BICMOS, PDSO8
Frequently Asked Questions
What input voltage range does the UCC2813PWTR-5 support and which power supply topologies does it target?
The UCC2813PWTR-5 operates with a Vcc input range of 4 V to 11 V and a nominal operating point of 10 V, making it suited to auxiliary bias supplies derived from a 12 V bus or a separate winding on a flyback transformer. It is optimized for discontinuous conduction mode flyback and boost converter topologies where current-mode PWM control provides fast line transient rejection and simplified slope compensation.
How does current-mode control in the UCC2813PWTR-5 benefit power supply loop stability compared to voltage-mode designs?
Current-mode control in the UCC2813PWTR-5 forces the inductor current to follow a reference set by the error amplifier on a cycle-by-cycle basis, effectively turning the inductor into a first-order current source. This reduces the loop from second-order to first-order, simplifying the compensation network to a single-pole design and improving phase margin. The result is faster transient response—typically 5×–10× faster than voltage-mode—critical for loads with rapid step changes such as DSP cores or RF power amplifiers.
What package does the UCC2813PWTR-5 use, and how does the integrated 5 V reference reduce external BOM?
The UCC2813PWTR-5 comes in an 8-pin SOIC with 1.27 mm lead pitch. The integrated trimmed 5 V reference eliminates a discrete reference IC and its decoupling, saving 2–3 passive components per design. Combined with the internal soft-start capacitor and the gate driver output capable of driving MOSFETs with up to 500 mA peak, the device integrates the core controller functions needed for a complete flyback power stage in under 15 mm² of board space.
For a 12 V to 3.3 V isolated flyback converter design, is the UCC2813PWTR-5 a practical controller choice?
Yes. In a 12 V isolated flyback, the UCC2813PWTR-5 Vcc is typically bootstrapped from a bias winding to approximately 10 V—within its 4 V to 11 V range—while the current-sense comparator monitors primary peak current up to the 1 V threshold each switching cycle. With a turns ratio selected for 3.3 V output and a 500 kHz switching frequency, the transformer can be wound on a compact EE13 or EFD15 core, and the 8-pin SOIC fits alongside the MOSFET and output rectifier in under 10 cm² of PCB area.
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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.
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $1.8900 | $1.89 |
| 1000+ | $1.1200 | $1120.00 |
| 10000+ | $0.9990 | $9990.00 |
| 100000+ | $0.8370 | $83700.00 |
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