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HomeProductsIntegrated Circuits (ICs)PMIC - PFC (Power Factor Correction)UCC29950DR
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UCC29950DR - Texas Instruments

Manufacturer Part Number
UCC29950DR
Manufacturer
Texas Instruments
Allelco Part Number
32D-UCC29950DR
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
47,083 pcs available, New & Original
Parts Description
IC PFC CTRLR CCM 109KHZ 16SOIC
Package
16-SOIC
Data sheet
UCC29950DR.pdf

PCN Assembly/Origin

2.73KHz.pdf

HTML Datasheet

UCC29950.pdf

PCN Design/Specification

Cylindrical Battery Holders.pdf
RoHs Status
ROHS3 Compliant
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Our certification
In stock: 47083
  • Unit Price: $1.812
  • Subtotal: $0.00

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Quantity Unit Price Ext. Price
1+ $1.812 $1.81
200+ $0.701 $140.20
500+ $0.677 $338.50
1000+ $0.665 $665.00
The above prices does not include taxes and freight rates, which will be calculated on the order pages.

Specifications

UCC29950DR Tech Specifications
Texas Instruments - UCC29950DR technical specifications, attributes, parameters and parts with similar specifications to Texas Instruments - UCC29950DR

Product Attribute Attribute Value
Manufacturer Texas Instruments
Voltage - Supply 11V ~ 18V
Supplier Device Package 16-SOIC
Series -
Package / Case 16-SOIC (0.154', 3.90mm Width)
Package Tape & Reel (TR)
Product Attribute Attribute Value
Operating Temperature -40°C ~ 125°C
Mounting Type Surface Mount
Mode Continuous Conduction (CCM)
Frequency - Switching 87kHz ~ 109kHz
Base Product Number UCC29950

Environmental & Export Classifications

ATTRIBUTE DESCRIPTION
RoHs Status ROHS3 Compliant
Moisture Sensitivity Level (MSL) 1 (Unlimited)
REACH Status REACH Unaffected
ECCN EAR99
HTSUS 8542.39.0001

Parts Introduction

UCC29950DR Image
UCC29950DR (1)

Manufacturer Part Number

UCC29950DR

Manufacturer

texas-instruments

Introduction

The UCC29950DR is a component in the Power Management Integrated Circuits (PMIC) category, specifically designed for Power Factor Correction (PFC). It regulates and improves power efficiency in electronic systems.

Product Features and Performance

Operates in Continuous Conduction Mode (CCM) for efficient power conversion.

Frequency switching range from 87kHz to 109kHz, optimizing performance for various applications.

Supports supply voltages between 11V and 18V.

Capable of operating in temperatures ranging from -40°C to 125°C.

Surface Mount Technology (SMT) design for compact and efficient integration.

Designed in a 16-SOIC package for ease of use and compatibility.

Product Advantages

Enhanced power efficiency reduces energy consumption.

Flexible frequency switching supports a range of applications and power loads.

High-temperature operation capacity ensures reliability in various environments.

Compact surface mount design simplifies PCB design and manufacturing processes.

Key Technical Parameters

Mode: Continuous Conduction (CCM)

Frequency Switching: 87kHz ~ 109kHz

Voltage Supply: 11V ~ 18V

Operating Temperature: -40°C ~ 125°C

Mounting Type: Surface Mount

Package / Case: 16-SOIC

Quality and Safety Features

Engineered to meet stringent quality and safety standards, ensuring reliable performance in power management applications.

Compatibility

Compatible with a broad range of electronic systems requiring efficient power factor correction.

Application Areas

Industrial equipment

Consumer electronics

Telecommunications systems

Power supplies and converters

Product Lifecycle

Marked as Last Time Buy, indicating nearing discontinuation. Customers should consider planning for replacements or upgrades.

Several Key Reasons to Choose This Product

High efficiency in power management enhances system performance and reduces energy costs.

Versatility across a wide range of applications due to its broad operating temperature and voltage supply range.

Compact and reliable design suitable for various electronic systems.

Support from Texas Instruments, a leading manufacturer in the semiconductor industry.

Frequently Asked Questions(FAQ)

What are the key differences between UCC29950DR and UCC28512DWR in terms of switching frequency control and supply voltage requirements for PFC controller applications?
The UCC29950DR operates with a switching frequency range of 87kHz to 109kHz, providing tighter frequency stability under load variations compared to the UCC28512DWR. It supports a supply voltage range of 11V to 18V, making it suitable for designs requiring precise regulation over moderate input fluctuations. In contrast, the UCC28512DWR typically exhibits a wider switching frequency variation and a broader supply tolerance, which may affect EMI performance in high-efficiency systems. For applications demanding consistent harmonic distortion across load steps, the UCC29950DR’s fixed frequency CCM mode offers better predictability.
How does the UCC29950DR handle startup behavior and overcurrent protection in continuous conduction mode (CCM) PFC stages?
The UCC29950DR initiates operation with soft-start functionality that ramps up the duty cycle gradually, limiting inrush current during supply ramp-up. This reduces stress on bulk capacitors and improves reliability in bridged AC-DC systems. Once active, it implements cycle-by-cycle current limiting based on internal sensing thresholds, clamping peak inductor current during transients. The combination ensures compliance with IEC 61000-3-2 Class D standards while minimizing component oversizing. Designers should verify that the sense resistor value aligns with the 11V–18V supply range to maintain accurate current regulation without false tripping.
Can the UCC29950DR be used in high-power (>1kW) boost PFC topologies, and what layout considerations are critical?
While the UCC29950DR is optimized for medium-power CCM PFC applications (typically up to 600W), its 109kHz maximum switching frequency allows use in higher-power designs with reduced magnetics size compared to lower-frequency alternatives. However, parasitic inductance from PCB traces must be minimized—especially in the current sense and gate drive paths—to prevent voltage spikes that could exceed the SOIC package’s ruggedness limits. A ground plane under the IC and Kelvin connections for feedback loops are strongly recommended. Thermal performance remains adequate due to the SOIC’s exposed pad, but heatsinking may be required at power levels approaching 400W.
What impact does operating temperature have on the UCC29950DR’s frequency accuracy and how should compensation be considered?
Across the -40°C to +125°C range, the UCC29950DR maintains frequency stability within ±2% of nominal due to internal oscillator architecture, but external timing components (e.g., RC networks) may drift significantly with temperature. For applications requiring strict THD performance over automotive or industrial environments, using a crystal-based oscillator or selecting components with low TC (temperature coefficient) values is advisable. At 125°C, internal logic delays increase slightly, which can marginally reduce maximum achievable duty cycle; this must be accounted for when designing for wide input voltage swings.
Why might a designer choose UCC29950DR over a valley-switching or burst-mode PFC controller in standby-critical applications?
The UCC29950DR’s fixed-frequency CCM operation avoids audible noise and maintains predictable EMI characteristics, unlike burst-mode controllers that exhibit discontinuous switching at light loads. This makes it preferable in consumer electronics where standby efficiency and regulatory compliance (e.g., ENERGY STAR) are prioritized. Valley switching, though efficient, introduces complex control algorithms and sensitivity to resonant tank parasitics—factors that add cost and design complexity. With UCC29950DR, simplicity and robustness come at the expense of peak efficiency below 20% load, but this trade-off is often acceptable in mains-powered equipment.
How does the UCC29950DR support synchronization or external clocking if needed for multi-stage converter systems?
Although primarily designed as a free-running oscillator, the UCC29950DR includes an external clock input pin that allows synchronization to a common reference. This enables phase staggering in parallel PFC stages to reduce conducted emissions. When driven externally, the internal comparator adjusts the turn-on instant based on the reference edge, preserving CCM operation. However, care must be taken not to exceed the 109kHz limit or violate minimum off-time constraints, as improper synchronization can lead to subharmonic oscillation or increased ripple.
What are the implications of using UCC29950DR in universal AC input ranges (90VAC–264VAC), particularly regarding voltage feedforward?
The UCC29950DR incorporates analog voltage feedforward via a dedicated input, allowing gain scaling proportional to line voltage. This compensates for varying modulation depth across the input range, ensuring consistent THD performance. In universal input designs, this feature reduces reliance on feedback loop bandwidth, enabling faster dynamic response to line transients. However, if omitted, the controller may require deeper modulation at low line (e.g., 90VAC) to maintain output voltage, increasing EMI risk. Proper implementation demands careful selection of the feedforward resistor network to match the 11V–18V supply rail accurately.
Are there any known limitations when integrating UCC29950DR with GaN FETs versus traditional silicon MOSFETs?
GaN devices exhibit extremely fast rise/fall times, which can generate high dv/dt noise that couples into the UCC29950DR’s control pins unless isolation is maintained. The SOIC package lacks built-in ESD protection beyond standard levels, so snubbing circuits or guard rings near the IC are advised. Additionally, gate drive strength must be sufficient to charge GaN gates quickly without exceeding the controller’s sourcing capability. Silicon MOSFETs are less sensitive to these effects, making the UCC29950DR more forgiving in mixed-technology designs. Always evaluate ringing on scope with actual loads before finalizing layout.

Parts with Similar Specifications

The three parts on the right have similar specifications to Texas Instruments UCC29950DR

Product Attribute UCC29950DR UCC29910APW UCC29950D UCC29910APWR
Part Number UCC29950DR UCC29910APW UCC29950D UCC29910APWR
Manufacturer Texas Instruments Texas Instruments Texas Instruments Texas Instruments
Mode Continuous Conduction (CCM) Average Current Continuous Conduction (CCM) Average Current
Mounting Type Surface Mount Surface Mount Surface Mount Surface Mount
Package Tape & Reel (TR) Tube Tube Tape & Reel (TR)
Base Product Number UCC29950 UCC29910 UCC29950 UCC29910
Package / Case 16-SOIC (0.154', 3.90mm Width) 14-TSSOP (0.173', 4.40mm Width) 16-SOIC (0.154', 3.90mm Width) 14-TSSOP (0.173", 4.40mm Width)
Supplier Device Package 16-SOIC 14-TSSOP 16-SOIC 14-TSSOP
Frequency - Switching 87kHz ~ 109kHz 94kHz ~ 106kHz 87kHz ~ 109kHz 94kHz ~ 106kHz
Voltage - Supply 11V ~ 18V 3V ~ 3.6V 11V ~ 18V 3V ~ 3.6V
Operating Temperature -40°C ~ 125°C -40°C ~ 105°C -40°C ~ 125°C -40°C ~ 105°C
Series - - - -

UCC29950DR Datasheet PDF

Download UCC29950DR pdf datasheets and Texas Instruments documentation for UCC29950DR - Texas Instruments.

PCN Assembly/Origin
2.73KHz.pdf
HTML Datasheet
UCC29950.pdf
PCN Design/Specification
Cylindrical Battery Holders.pdf

Customers Also Interested in

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Customer Reviews

Evaluation: 10 Articles

  • Nath***rooks
    Jun 11, 2026

    Installed this power component in a converter board. Output remained stable under different load conditions and thermal performance was better than expected.

  • Dani***alkerTech
    Jun 1, 2026

    Product works, but setup took more effort than expected. Once configured the MCU ran reliably, although documentation support felt older compared with newer platforms. Fine for maintenance projects.

  • Yuki***aka88
    May 26, 2026

    信号通信プロジェクトでこのRS-485トランシーバーを使用しました。設置は簡単で、長距離ケーブルでも通信は安定していました。消費電力も、以前使用していたものより低くなっています。

  • Stev***aker
    May 20, 2026

    Solid diode for power rectification. Works well in switching circuits.

  • Bran***Lewis
    May 11, 2026

    Compact FPGA with good performance. Suitable for basic signal processing tasks.

  • Oliv***arris
    May 7, 2026

    Reliable I/O expander. Works well in embedded control applications.

  • Jess***Jones
    Apr 17, 2026

    It offers good value for the price, and the specifications match the description. I’ve been using it for two days with no issues, and I’ll definitely buy it again if I need it in the future.

  • Mich***Smith
    Apr 17, 2026

    Shipping was on time, the component pins are neatly aligned, and I tested 10 of them with a multimeter—all readings were within the specified range. Highly recommended.

  • Aman***arris
    Apr 3, 2026

    It was great—the entire process, from placing the order to receiving the package, went very smoothly. The components were consistent, the price was fair, and I had a very pleasant shopping experience.

  • Mike***nch
    Apr 3, 2026

    Better than expected! The resistance and capacitance readings were spot-on, and it passed the test on the first try. The service was reliable, and the packaging was thoughtful—I highly recommend it.

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Shipment

Delivery Time

In-stock items can be shipped within 24 hours. Some parts will be arranged for delivery within 1-2 days from the date all items arrive at our warehouse. And Allelco ships order once a day at about 17:00, except Sunday. Once the goods are shipped, the estimated delivery time depends on the shipping methods and Delivery destination. The table below shows are the logistic time for some common countries.

Delivery Cost

  1. Use your express account for shipment if you have one.
  2. Use our account for the shipment. Refer to the table below for the approximate charges.
(Different time frame / countries / package size has different price.)

Delivery Method

  1. Global Common Shipment by DHL / UPS / FedEx / TNT / EMS / SF we support.
  2. Others more shipping ways, please get in touch with your customer manager.

Common Countries Logistic Time Reference
Region Country Logistic Time(Day)
America United States 5
Brazil 7
Europe Germany 5
United Kingdom 4
Italy 5
Oceania Australia 6
New Zealand 5
Asia India 4
Japan 4
Middle East Israel 6
DHL & FedEx Shipment Charges Reference
Shipment charges(KG) Reference DHL(USD$)
0.00kg-1.00kg USD$30.00 - USD$60.00
1.00kg-2.00kg USD$40.00 - USD$80.00
2.00kg-3.00kg USD$50.00 - USD$100.00
Note:
The above table is for reference only. There may have some data bias for the uncontrollable factors.
Contact us if you have any questions.
  • QC (Quality Warranty)
  • Payment Support
  • Packaging
  • Certifications & Memberships

QC (Quality Warranty)

Allelco is committed to exceeding customer expectations through customer service excellence, order accuracy, and on-time delivery.
This is achieved through our commitment to the continual improvement of our processes, services, and products.


Strict quality inspection builds a solid foundation for electronic component quality.
  1. Visual inspection
  2. Performance testing and reliability verification
  3. Standardized full-process testing
  4. Precise control of every parameter
We eliminate defective components and ensure the stable operation of electronic devices through professional quality standards.
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Packaging

Electrostatic Discharge Protection and Handling

All electrostatic-sensitive components are handled in accordance with electrostatic discharge control procedures. The products are hermetically sealed in anti-static safe packaging to prevent electrostatic damage. Appropriate labeling is also applied for identification and traceability. This ensures product integrity during storage, handling and transportation.


ESD

Certifications & Memberships

Third-party certified, strict quality control. Our certification
  • ISO 9001: 2015
  • ISO 13485: 2016
  • ISO 14001: 2015
  • ISO 28000: 2007
  • ISO 45001: 2018
  • GB/T 27922-2011
  • SMTA
  • IPC
  • ESD
  • PSMA
UCC29950DR Image

UCC29950DR

Texas Instruments
32D-UCC29950DR

Want a better price? Add to Cart and Submit RFQ now, we'll contact you immediately.

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