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Integrated Circuits (ICs)
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RF and Wireless
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Optoelectronics
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Sensors, Transducers
Sensors, Transducers
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Connectors, Interconnects
Connectors, Interconnects
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Resistors
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Capacitors
Capacitors
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Transformers
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Isolators
Isolators
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Crystals, Oscillators, Resonators
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Switches
Switches
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Relays
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See specs for product details.
See specs for product details.
onsemi UC3843BD
| Part Number: | UC3843BD |
|---|---|
| Manufacturer/Brand: | AMI Semiconductor/onsemi |
| Part of Description: | IC REG CTRLR FLYBACK 14SOIC |
| Datasheets: |
|
| RoHs Status: | Lead free / RoHs compliant |
| Payment: | PayPal / Credit Card / T/T |
| Shipment Way: | DHL / Fedex / TNT / UPS / EMS |
| Share: |
Ship From: Hong Kong
| Quantity | Unit Price |
|---|---|
| 1+ | $0.3611 |
Online RFQ submissions: Fast responses, Better prices!
- Specifications
- Shopping Manual
- Shipping Information
- QC & Packaging
-
onsemi UC3843BD technical specifications, attributes, parameters and parts with similar specifications to onsemi UC3843BD.Product Attribute Attribute Value Voltage - Supply (Vcc/Vdd) 7.6V ~ 30V Topology Boost, Flyback Synchronous Rectifier No Supplier Device Package 14-SOIC Series - Serial Interfaces - Package / Case 14-SOIC (0.154", 3.90mm Width) Package Tube Output Type Transistor Driver Output Phases 1 Product Attribute Attribute Value Output Configuration Positive, Isolation Capable Operating Temperature 0°C ~ 70°C (TA) Number of Outputs 1 Mounting Type Surface Mount Function Step-Up, Step-Up/Step-Down Frequency - Switching Up to 500kHz Duty Cycle (Max) 96% Control Features Frequency Control Clock Sync No Base Product Number UC3843 -
- Returns Policy
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Returns must be requested within 60 days of the invoice date and include:
- Original invoice number
- Photo of the parts
- Brief explanation or test report stating the reason for return
Returns will not be accepted after 60 days. Returned items must be in original packaging and resalable condition. Returns due to customer errors at the time of quote or purchase will not be accepted. Contact customer service for return authorization before shipping.
- How to Buy
-
We support both online and offline orders. For detailed guidance on the ordering process, please visit the following link:
https://www.Y-IC.com/RFQ-Quote.htm
If you encounter any issues, feel free to contact our customer service team for assistance.
- Payment
-
We accept the following payment methods:
- T/T in advance (bank transfer)
- Western Union
- Credit Card / Visa / Mastercard / PayPal
Please note that customers are responsible for shipping fees, bank charges, duties, and taxes.
-
- Delivery Period
- Packages will be scheduled for delivery within 1-2 days after all items have arrived at our warehouse. In-stock items will be shipped within 24 hours. The delivery time varies based on the shipping method and the destination.
- Shipping Tracking
- Once the components are delivered, the tracking number will be emailed to you immediately. You can also find the tracking number in your order history.
- Shipping Rate
-
Shipping rates are determined by the size, weight, and destination of the package. YIC provides competitive shipping options through leading carriers such as DHL, FedEx and UPS. Additionally, we offer the option for customers to use their own shipping accounts for direct billing.
-
Quality Control (QC)
Packaging
ESD antistatic protection.
All products are packaged in anti-static bags and shipped with ESD antistatic protection. The label on the external ESD packaging will include our company information: part number, brand, and quantity.
We inspect all goods prior to shipment to ensure they are in excellent condition and verify that the parts are new, original, and match the datasheet specifications. After confirming that everyting is in order,we securely package the items and ship them via global express.
UC3843BD Product Details
Mfr. Part
UC3843BD
Manufacturer
Y-IC is a quality distributor of onsemi brand products. We will provide customers with the best products and services.
Detailed Description
The UC3843BD is a current-mode, pulse-width-modulated (PWM) control IC designed for off-line and DC-to-DC power supply applications. It features a high-gain error amplifier, an on-chip voltage reference, and a precision oscillator.
Key Features
Current-mode, pulse-width-modulated (PWM) control IC
High-gain error amplifier
On-chip voltage reference
Precision oscillator
Key Advantages
Suitable for off-line and DC-to-DC power supply applications
Versatile design with step-up, step-up/step-down, and positive output with isolation capability
Wide input voltage range of 7.6V to 30V
High switching frequency up to 500kHz
Maximum duty cycle of 96%
Packaging
Surface mount 14-SOIC (0.154", 3.90mm Width) package
Suitable for a variety of thermal and electrical requirements
Lifecycle
The UC3843BD is an obsolete product
Customers should contact our sales team via our website for information on equivalent or alternative models
Key Application Areas
Off-line power supplies
DC-to-DC power converters
Switching mode power supplies
Datasheet
The most authoritative datasheet for the UC3843BD is available on our website. Customers are recommended to download it for detailed product specifications.
Request for Quotation Now
Customers are recommended to obtain quotes on our website. Get a quote now to learn more about this limited time offer.
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User Review
-
Powe***b_Engineer
Excellent power MOSFET for high-voltage switching applications. Switching characteristics are predictable and device temperatures stayed within limits.June 15th, 2026
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Marc***lectronics
This FPGA has been working well in an image processing application. Configuration completed successfully and I have not experienced any reliability issues.June 11th, 2026
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Sato***Electronics
Reliable DSP controller for motor and signal applications. Performance remained stable and integration with existing hardware was straightforward.June 5th, 2026
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FPGA***ris
This FPGA worked exactly as expected. Used for signal processing and high-speed data control. Configuration completed without issues and timing closure was easier than expected.May 28th, 2026
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Robe***lark
Excellent MCU for real-time control and power applications. Stable and fast processing.May 22th, 2026
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Geor***cott
Works fine as a signal component in timing circuits. No issues so far.May 12th, 2026
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Oliv***arris
good communicationMay 8th, 2026
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Bria***lson
Reliable FPGA. Worked smoothly in my MCU + signal integration project.April 28th, 2026
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Jess***Miller
It works well in my FPGA signal processing setup. Performance is stable and meets the spec without issues so far.April 20th, 2026
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Powe***sign_Guy
LM5145RGYR works fine in a DC-DC power design. Efficiency is good, but layout needs to be carefully optimized.April 17th, 2026
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Powe***ive_
Used the FF900R12IP4 in an automotive inverter project. Power handling is solid and thermal performance is stable under load.April 8th, 2026
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Vipe***rcuit
One unit failed during initial power-up, but the rest were fine. Mixed experience overall.March 31th, 2026
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Hiro*** T.
Perfect replacement part. My system worked immediately after installation.March 23th, 2026
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Yuki***
Works very well. I used AD8108ASTZ for video switching project. Stable and no noise problem.March 20th, 2026
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Jaso***.
Used the AD8108ASTZ in a video routing board and it worked perfectly. Clean switching and no noticeable signal degradation.March 9th, 2026
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Devo***.
Exactly as described. Great price for a pack of 10.March 4th, 2026
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Alex***
Moderate quality chip. Works fine at room temperature, but in high temp conditions it seemed to drift. Not terrible, but not premium either.February 28th, 2026
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Core***nalSourcing
Service was efficient and polite. Components were packed well and labels were clear. Appreciated the attention to detail.February 3th, 2026
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Nano***icBuyer
Good.January 28th, 2026
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Quan***Sourcing
Clear communication and quick updates during the whole process. The parts arrived as described. Very satisfied with the service.January 19th, 2026
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Fusi***oreBuyer
Prompt replies. The order process was smooth and the delivery matched the promised timeline. Satisfied with the service.January 16th, 2026
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Opti***pSolutions
GoodJanuary 9th, 2026
-
Tech***cuitBuyer
quick answer to our requestDecember 29th, 2025
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Nova***ponentHub
Recommended, trustedDecember 25th, 2025
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Grid***ion
Our procurement team relies on YIC for sourcing discontinued parts. They consistently deliver quality and handle cross-references when needed. Great value and support.December 17th, 2025
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Terr***nse Microtech
Excellent service! We urgently needed a batch of TMS320LF2406APZA for a critical production line. YIC not only offered competitive pricing but also ensured on-time delivery. We’ll definitely reorder.December 10th, 2025
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Tita***is Industrial
Our urgent production run was saved thanks to their stock of EOL components. Definitely a supplier we will use again.December 4th, 2025
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Mich***_Embedded
Very professional supplier – confirmed stock quickly and kept me updated until delivery.November 25th, 2025
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ches***_y
Our EMS line was waiting on MAX3030EEUE+T RS-422 drivers. IC-Components split the shipment—partial now, balance next week—so the SMT schedule didn’t slip. Practical and proactive.November 20th, 2025
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ca_c***onents_ashley
The goods work as expected and the quote was clear. Only gripe: website showed ‘thousands in stock’ but true on-hand was zero; they turned it around via factory in 5 days and kept me posted. Fair recovery.November 11th, 2025
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Quin***avis
Needed 250 pcs of LT4256-2IS8#PBF on short notice. They split reels for me, kept the MOQ reasonable, and sent full traceability docs + RoHS/REACH. Will buy again.November 3th, 2025
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Jaso***ouis
Solid experience end to end. Order arrived faster than expected and the components came in moisture barrier bags with traceable labels.October 30th, 2025
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AmpC***
The price is good, very satisfied with this purchase.October 22th, 2025
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Eric***mmons
Great experience overall. The order was processed quickly, and the quality of the electronic components met our expectations.October 16th, 2025
-
Jona***n Brooks
Fast delivery and professional service. Great experience from order to receipt.October 9th, 2025
-
Jess***
Very professional supplier. I received my package quickly, and they were well packed. The team followed up until delivery was complete.September 28th, 2025
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Sher***
Fast deliverySeptember 17th, 2025
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Antw***Shawn
I found what I needed, great productSeptember 9th, 2025
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Shir***neFrame
対応が良くて返信も早いです。発送も早くて助かりました。また買います。September 1th, 2025
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7ama***
Seller was super nice, product quality is okay, and replies came really fast. Overall, shopping here felt easy and pleasant, would be happy to buy again.August 25th, 2025
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Zinn***Clarke
Fast shipping, great customer service, and the item came super well-packed. Loved it!August 20th, 2025
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Josh***Alexander
Outstanding customer support! They’re extremely helpful!July 3th, 2025
-
Lily***nchez
Everything is great!December 18th, 2024
-
Gabr*** Rivera
Great service! Fast shipping! Highly recommended!June 21th, 2023
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Zoey***ice
The goods were delivered on time and well packaged. Communication with customer service was smooth and easy.April 27th, 2023
-
Madi*** Morgan
We're very satisfied with our purchasing experience at Y-IC, and we're glad to have Jimmy as our point of contact. He responds quickly and always provides competitive pricing.July 1th, 2022
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Rile***eterson
We had a great experience, with excellent communication and customer support, competitive pricing, and fast delivery.March 4th, 2021
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Anth*** Butler
I had an excellent experience with Y-IC. Their service was outstanding, and communication was always clear and friendly. All of my questions were answered promptly and professionally. Highly recommended!September 10th, 2020
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Chlo***ughes
This is the fourth time I've purchased components from here. The quality and service are excellent! My contact is very responsive and highly professional!January 23th, 2020
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