TI UC3843AD
Designed for various applications requiring precision control of power output





Brands: Texas Instruments
Mfr.Part #: UC3843AD
Datasheet: UC3843AD Datasheet (PDF)
Package/Case: SOIC (D)-14
RoHS Status:
Stock Condition: 5,406 pcs, New Original
Warranty: 1 Year Ovaga Warranty - Find Out More
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In Stock 5,406 PCS
UC3843AD General Description
Boasting adjustable current limiting and a pulse-by-pulse current limiting scheme, the UC3843AD provides comprehensive protection for the power MOSFET and other components against overcurrent conditions. It also features overvoltage protection, thermal shutdown, and undervoltage lockout, enhancing system reliability and safeguarding against potential hazards

Features
- Real-Time Feedback Control
- High-Speed Current Sensing > 100kHz
- Compact Package Size (6-pin SOT23-3)
Application
- Compact power solution
- Cost-effective LED driver
- Precision motor control
Specifications
Parameter | Value | Parameter | Value |
---|---|---|---|
Regulator Topology | Boost, Buck, Flyback, Forward | Control mode | Current |
Duty cycle (max) (%) | 100 | Switching frequency (max) (kHz) | 500 |
Features | Adjustable switching frequency, Current limiting, Dead time control, Error amplifier, Multi-topology | UVLO thresholds on/off (V) | 8.4/7.6 |
Operating temperature range (°C) | 0 to 70 | Rating | Catalog |
Gate drive (typ) (A) | 1 | Vin (max) (V) | 28 |
Base Product Number | UC3843 |
Shipping
Shipping Type | Ship Fee | Lead Time | |
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DHL | $20.00-$40.00 (0.50 KG) | 2-5 days |
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Fedex | $20.00-$40.00 (0.50 KG) | 2-5 days |
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UPS | $20.00-$40.00 (0.50 KG) | 2-5 days |
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TNT | $20.00-$40.00 (0.50 KG) | 2-5 days |
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EMS | $20.00-$40.00 (0.50 KG) | 2-5 days |
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REGISTERED AIR MAIL | $20.00-$40.00 (0.50 KG) | 2-5 days |
Processing Time:Shipping fee depend on different zone and country.
Payment
Terms of payment | Hand Fee | |
---|---|---|
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Wire Transfer | charge US$30.00 banking fee. |
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Paypal | charge 4.5% service fee. |
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Credit Card | charge 3.5% service fee. |
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Western Union | charge US.00 banking fee. |
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Money Gram | charge US$0.00 banking fee. |
Guarantees
1.The electronic components you purchase include 365 Days Warranty, We guarantee product quality.
2.If some of the items you received aren't of perfect quality, we would resiponsibly arrange your refund or replacement. But the items must remain their orginal condition.
Packing
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Step1 :Product Inventory
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Step2 :Pressure Relief Packaging
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Step3 :Anti Static Packaging
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Step4 :Protective Packaging
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Step5 :Sealed Packaging
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Step6 :Preparation for shipment
We will inspect and count all goods before shipping to ensure that all products are intact and in accurate quantity, and will fully package them to ensure that they will not be damaged during transportation.
Q: How can I order the UC3843AD?
A: To place an order for the UC3843AD, select the "Add to Cart" button associated with the product listing on our website. Once selected, you can finalize your purchase by proceeding to the checkout page, where you can enter your payment and shipping information.
Q: What is the warranty period for the UC3843AD?
A: We offer a 1-year warranty on the UC3843AD. This warranty covers any defects in materials and artistry under normal use. During the warranty period, if the product is found to be defective, it will be repaired or replaced at no charge. For further details, please refer to our warranty policy.
Q: How does Ovaga ensure the authenticity of UC3843AD from Texas Instruments?
A: Ovaga has a dedicated business development team that rigorously tests and verifies the credentials of original Texas Instruments manufacturers and authorized agents. All Texas Instruments suppliers must pass a qualification review before they can list their UC3843AD products on our platform. We emphasize sourcing from reliable channels and maintaining high product quality standards, ensuring you can make your purchase with confidence.
Q: How can I find detailed information about the UC3843AD chips, such as application notes, factory information, and images?
A: You can utilize Ovaga's intelligent search engine, filter by the Ethernet PHY Products category, or visit the Texas Instruments information page to find comprehensive details about the UC3843AD.
Q: Are the price and stock information for UC3843AD on Ovaga's platform accurate?
A: Inventory levels for Texas Instruments products can fluctuate and may not be updated in real time. The information is refreshed periodically within 24 hours. To confirm stock availability and final pricing, you must confirm your order with an Ovaga salesperson or customer service representative before proceeding with payment.
Q: Can I place orders offline with Ovaga?
A: Yes, offline orders are accepted. You can navigate to the "My Orders" section and enter transaction management to place your order. Reviewing the "Order Details" and proceeding to place the order is straightforward. Additionally, you may benefit from coupons or selected gifts when ordering online.
Q: What payment methods are accepted by Ovaga?
A: Ovaga accepts various payment methods, including Wire Transfer, PayPal, Credit Cards, Western Union, and Money Gram.
Q: How is shipping arranged, and how can I track my package?
A: Customers can choose from industry-leading freight companies such as DHL, FedEx, UPS, TNT, EMS, and Registered Air Mail. Once your order is processed for shipment, you will receive an email with the shipping status and tracking number. Note that tracking information may take up to 24 hours to be displayed by carriers. Typically, express delivery takes 2-5 days.
Q: What is the return or replacement process for UC3843AD?
A: Ovaga conducts Pre-Shipment Inspections (PSI) on all orders to ensure quality before shipment. Suppose there are issues such as quantity discrepancies, incorrect items, or visible defects (e.g., breakage or rust), and they are acknowledged by us. In that case, returns or replacements will be accepted under the following conditions:
- ●The defect must be reported within 365 days after delivery.
- ●The product must be unused and in its original, unopened packaging.
- ●Requesting Return Authorizations must be obtained.
For the return process:
- ●Please inform us within 365 days of receiving the product.
- ●Obtain Return Authorization from our team.
- ●Please refer to our After-Sale Matters for more detailed instructions.
Q: How can I contact Ovaga for support, including obtaining datasheets or pin diagrams for the UC3843AD?
A: For any after-sales support or technical inquiries, including requests for datasheets or pin diagrams, please get in touch with us via email at [email protected].
Q: What can you tell me about Ovaga's quality assurance practices?
A: Ovaga is committed to maintaining the highest standards of quality. We are certified under ISO14001, ISO 9001, IATF16949, ISO13485, and DUNS standards by the Quality Systems Registrar. This certification signifies that our operational systems meet stringent international standards in quality management. Our compliance is regularly reviewed and tested to ensure ongoing adherence to these standards, affirming our commitment to quality and continuous improvement.
Q: What do the ISO, IATF, and DUNS certifications mean for customers of Ovaga?
A: Our ISO, IATF, and DUNS certifications assure customers that Ovaga operates systems that are both accurate and comprehensive, meeting the rigorous requirements of the ISO, IATF, and DUNS standards. This certification underscores our long-term commitment to continuous improvement across our operations. As a note to our customers, while we strive for accuracy in product data on our website, we recommend referring to the manufacturer's datasheet or catalog for confirmed product specifications before placing an order. If you identify any discrepancies, please get in touch with us immediately.
Part points
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The UC3843AD is a pulse width modulation (PWM) controller used in switch-mode power supplies. It provides adjustable output voltage regulation and controls the duty cycle of the power transistor to maintain the desired output voltage. The chip is commonly used in various applications including LED drivers, battery chargers, and DC-DC converters.
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Equivalent
The UC3843AD chip is part of the UC3843 series of fixed-frequency PWM controllers. Equivalent products include UC3843B, UC2843AD, and UC2843A, which offer similar functionality and are suitable replacements for the UC3843AD in various power supply applications. -
Features
The UC3843AD is a high-performance, fixed-frequency current mode controller with advanced protection features. It operates on a voltage range of 7V to 25V, has a 1A totem pole output, and a duty cycle range of 0% to 100%. Additional features include adjustable soft-start, overvoltage protection, and short circuit protection. -
Pinout
The UC3843AD is a pulse width modulation (PWM) controller IC. It has 8 pins in total. The pin functions of UC3843AD are: Pin 1 (Output), Pin 2 (Latch), Pin 3 (Internal reference), Pin 4 (Compensation), Pin 5 (Error Amplifier), Pin 6 (Ground), Pin 7 (Soft Start/Shutdown), and Pin 8 (VCC). -
Manufacturer
The UC3843AD is manufactured by Texas Instruments (TI). Texas Instruments is a multinational semiconductor company specializing in the design and production of various integrated circuits and semiconductor devices. They offer a wide range of products for various industries including automotive, industrial, personal electronics, and communications. -
Application Field
The UC3843AD is a versatile PWM controller commonly used in various power supply applications such as offline and DC-DC converters, battery chargers, and LED drivers. It provides precise control over the switching frequency and duty cycle, ensuring efficient power conversion and regulation. -
Package
The UC3843AD chip is packaged in a 14-pin Dual In-Line Package (DIP) form. The package size of the chip is approximately 9.9 mm x 6.6 mm.
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