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UCC28514N
Texas Instruments
IC PFC CTR AV CURR 200KHZ 20DIP
4111 Pcs New Original In Stock
PFC IC Average Current 200kHz 20-PDIP
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5.0 / 5.0
- (97 Ratings)
UCC28514N
Product Overview
1839450
DiGi Electronics Part Number
UCC28514N-DGManufacturer
Texas Instruments
UCC28514N
Description
IC PFC CTR AV CURR 200KHZ 20DIPInventory
4111 Pcs New Original In Stock
PFC IC Average Current 200kHz 20-PDIP
Quantity
Minimum 1
Minimum 1
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UCC28514N Technical Specifications
Category
Power Management (PMIC), PFC (Power Factor Correction)
Packaging
-
Series
-
Product Status
Obsolete
Mode
Average Current
Frequency - Switching
200kHz
Current - Startup
100 µA
Voltage - Supply
9.7V ~ 18V
Operating Temperature
-40°C ~ 105°C
Mounting Type
Through Hole
Package / Case
20-DIP (0.300", 7.62mm)
Supplier Device Package
20-PDIP
Base Product Number
UCC28514
Datasheet & Documents
HTML Datasheet
UCC28514N-DG
Environmental & Export Classification
RoHS Status
ROHS3 Compliant
Moisture Sensitivity Level (MSL)
1 (Unlimited)
REACH Status
REACH Unaffected
ECCN
EAR99
HTSUS
8542.39.0001
Additional Information
Other Names
TEXTISUCC28514N
296-14227-5
-UCC28514N-NDR
-296-14227-5-DG
2156-UCC28514N-TI
UCC28514NE4
-296-14227-5
UCC28514NE4-DG
-UCC28514NE4
-UCC28514NE4-NDR
Standard Package
20
Reviews
5.0/5.0-(Show up to 5 Ratings)
de desembre 02, 2025
Their products offer peace of mind with their durability and cost-effectiveness.
de desembre 02, 2025
Impressed with their consistent on-time delivery; I always receive my orders promptly.
de desembre 02, 2025
I appreciate how quickly DiGi Electronics addresses any post-purchase concerns, ensuring a smooth experience.
de desembre 02, 2025
Impressed with their quick shipping. The reasonable prices make this my go-to store for electronic parts.
de desembre 02, 2025
DiGi Electronics' products have minimized defects and increased my efficiency.
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Frequently Asked Questions (FAQ)
What are the key design-in risks when using the UCC28514N in a new power factor correction (PFC) design given its obsolete status?
Using the UCC28514N in new designs carries significant long-term supply chain risks due to its obsolete status from Texas Instruments. While current stock is available, future production is not guaranteed, which can jeopardize product lifecycle and scalability. For new designs, consider actively sourcing last-time-buy (LTB) quantities or transitioning to active-recommended alternatives like the UCC28064A or NCP1653A. If proceeding with the UCC28514N, implement buffer stocking and evaluate second-source options or drop-in pin-compatible replacements early in the design phase to mitigate obsolescence-related disruptions.
How does the 200kHz switching frequency of the UCC28514N impact thermal and EMI performance in high-density PFC applications?
The 200kHz switching frequency of the UCC28514N enables smaller magnetics and output filters, beneficial for compact designs. However, it increases switching losses in MOSFETs and diodes, potentially raising thermal stress—particularly at full load. To manage this, ensure gate drivers have low impedance and use fast-recovery or SiC diodes to minimize reverse recovery losses. Additionally, higher-frequency operation raises EMI concerns; employ careful PCB layout (e.g., short high-current loops), add a properly designed EMI filter, and consider spread-spectrum techniques if available or use of external filtering to meet regulatory standards.
Can the UCC28514N replace the UC3854BN in an existing average current mode PFC stage, and what design adjustments are required?
Yes, the UCC28514N can serve as a functional replacement for the UC3854BN since both are average current mode PFC controllers operating up to 200kHz with similar pinouts and control architectures. However, the UCC28514N includes enhanced protection features and lower startup current (100µA vs. ~250µA), which may require recalibration of the VCC capacitor and resistor startup network. Verify compatibility of the error amplifier reference voltage (2.5V) and check overvoltage protection (OVP) and current sensing thresholds—adjust feedback divider networks and sense resistor values accordingly to maintain safe operation.
What layout and grounding practices are critical when designing with the UCC28514N in through-hole 20-PDIP package for stable average current mode control?
Despite the robustness of the through-hole 20-PDIP package, poor PCB layout can introduce noise coupling and instability in the UCC28514N-based PFC stage. Keep high-current switching traces (e.g., MOSFET to boost diode) short and wide, and use a dedicated power ground plane separate from analog small-signal grounds. Tie both grounds at a single point near the UCC28514N's return pin (pin 5). Shield the current sense resistor and its traces, and route the CS (pin 4) and output sense (pin 1) inputs with guard rings to prevent false triggering. Use 0.1µF ceramic capacitors close to VDD (pin 19) and ground (pin 5) to suppress supply noise.
What are the reliability concerns when operating the UCC28514N at the upper end of its 105°C temperature rating in industrial power supplies?
Operating the UCC28514N near its maximum junction temperature of 105°C increases long-term parametric drift and reduces system reliability, especially when combined with high stress on external components. Mitigate this by derating the IC's operation—aim for case temperatures below 90°C with adequate heatsinking and airflow. Pay attention to the thermal coupling of the boost MOSFET and inductor to the UCC28514N’s mounting area. Use high-temperature-rated capacitors (105°C or 125°C) on bias, feedback, and timing circuits, and verify start-up and load transient behavior across temperature extremes to avoid thermal runaway or protection latch-up.
Quality Assurance (QC)
DiGi ensures the quality and authenticity of every electronic component through professional inspections and batch sampling, guaranteeing reliable sourcing, stable performance, and compliance with technical specifications, helping customers reduce supply chain risks and confidently use components in production.
UCC28514N CAD Models
Texas Instruments UCC28514N PCB symbols & footprints
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