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UC3843AD8
8-SOIC package with 8.4V/7.6V UVLOUC3843AD8
8-SOIC package with 8.4V/7.6V UVLO
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Manufacturer Part # : UC3843AD8
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Package/Case: SOIC (D)-8
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Brand: Texas Instruments
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Product Categories : Power Supply Controllers, Monitors
Quality Assurance
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Certification
We have successfully obtained various certification standards and have established our own professional testing laboratory. This ensures that every product we supply to our customers meets the highest quality standards. We adhere to strict testing protocols to maintain the consistency and accuracy of our products. To ensure that our products are original and genuine, we also collaborate with reputable third-party testing facilities to conduct rigorous quality testing. Our commitment to quality extends to meeting industry, legal, regulatory, and ISO 9001:2015 requirements.
Shipping & Payment
Shipping & Payment
About Shipping
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Service & Packaging
Service & Packaging
About After Sales Service
All Parts Extended Quality Guarantee
Initiate the application within 90 days from the shipment date.
Confirm the return or exchange with our staff.
Maintain the goods in their original condition as received.
Lastly, please note that the eligibility for return or exchange of goods is subject to an assessment of the actual condition of the returned items. We will evaluate the received goods before finalizing the return or exchange process. If you have any inquiries or require further assistance regarding returns or exchanges, please don't hesitate to contact us at [email protected]
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Regarding packaging, our products are carefully packed in anti-static bags to provide ESD anti-static protection. The outer packaging is durable with secure closure. We support various packaging methods such as Tape and Reel, Cut Tape, Tube, or Tray.
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UC3843AD8 DataSheet
Current price plan is under preparation. Please contact our customer service team for the latest pricing information. Thank you for your understanding and support!
Details
Revolutionize your power supply designs with the UC3843AD8, a cutting-edge control device that combines advanced features with unmatched performance. Perfect for current-mode or switched-mode power supplies, this device is a game-changer in the world of power electronics. With its low startup current, finely tuned oscillator discharge trimming, and powerful output stage, the UC3843AD8 sets a new standard for efficiency and reliability. Whether you're working on a commercial project or a personal DIY endeavor, this device is sure to elevate your design and take it to the next level. Trust the UC3843AD8 to deliver superior results and transform your power supply applications
Key Features
- Superior soft-start performance
- Rapid power supply settling time
- Protected from thermal overload
- Avoids damage from undervoltage
Application
- High efficiency power supplies
- Versatile LED drivers
- Popular motor control chip
Specifications
The followings are basic parameters of the part selected concerning the characteristics of the part and categories it belongs to.
| 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 |
FAQs
What is UC3843AD8?
The UC3843AD8 is a current-mode PWM (Pulse Width Modulation) controller integrated circuit designed by Texas Instruments. It is commonly used in power supply applications to regulate the output voltage or current through controlling the duty cycle of a switching power supply.
How Does UC3843AD8 Work?
The UC3843AD8 works by comparing a feedback signal representing the output voltage or current with a reference voltage. Based on this comparison, it adjusts the duty cycle of the PWM signal sent to the power switch, regulating the power supply output. The device operates in a current-mode control scheme, providing inherent stability and ease of compensation in feedback loops.
How Many Pins does UC3843AD8 have and What are the Functions of the Pinout Configuration?
The UC3843AD8 is housed in an 8-pin dual in-line package (DIP). The pinout configuration includes:
- VCC: Supply voltage input pin for the internal control circuits.
- CS: Current sense input for monitoring the current in the power switch.
- RT/CT: Pin for connecting the timing resistor (RT) and timing capacitor (CT) to set the oscillator frequency.
- OUT: PWM output pin that connects to the power switch.
- GND: Ground pin for the IC.
What are the Pros and Cons of UC3843AD8?
Pros:
- Efficient Power Regulation: Provides precise control over power supply output voltages or currents.
- Current-Mode Control: Ensures stable operation and simplifies feedback loop design.
- Wide Operating Voltage Range: Can work with a variety of supply voltages.
- Cost-Effective: Offers a cost-effective solution for power supply control applications.
- Protection Features: May include built-in protection mechanisms for overcurrent and overvoltage conditions.
Cons:
- External Components: May require external components such as resistors and capacitors for setting oscillator frequency and compensation.
- Noisy Environments: Sensitivity to noise may require additional filtering or shielding.
- Application Specific: Primarily designed for power supply applications and may not be suitable for other types of circuits.
Are There Any Equivalents/Alternatives to UC3843AD8 for Recommendation?
- The UC3842A and UC3844A are variations of the UC3843 with slightly different features and specifications.
- Alternatives to the UC3843AD8 include the TL494 from Texas Instruments and the SG3525A from ON Semiconductor.
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