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UC1843J
Current Mode PWM Controller UC1843J is designed for efficient and precise control of power electronics systems
UC1843J
Current Mode PWM Controller UC1843J is designed for efficient and precise control of power electronics systems
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Manufacturer Part # : UC1843J
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Package/Case: CDIP-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]
About packaging
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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UC1843J 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
Engineered for precision and control, the UC1843J voltage mode PWM controller is a sophisticated solution for regulating power supplies with utmost accuracy and efficiency. Operating within a frequency range of 100kHz to 500kHz, this controller offers precise duty cycle control, making it suitable for a wide range of applications, including offline and DC-to-DC converters. Its wide input voltage range of 8V to 18V provides flexibility and adaptability in various electronic designs, while features like adjustable dead time ensure optimal MOSFET switching performance. The UC1843J integrates a voltage reference with ±1% accuracy, along with a high-current totem pole output stage for direct power MOSFET driving, enhancing overall system performance and reliability. Additionally, the controller includes built-in soft-start capability to reduce inrush current and features like overcurrent protection and thermal shutdown for safeguarding against fault conditions. With its comprehensive features and protection mechanisms, the UC1843J is a dependable choice for power supply designs in diverse electronic applications, offering robustness and stability in operation
Key Features
- This PWM controller has many advanced features
- Such as adjustable frequency up to 500kHz and programmable soft-start
- It also has cycle-by-cycle current limiting for safe operation
- This makes it suitable for various power supply applications
Specifications
The followings are basic parameters of the part selected concerning the characteristics of the part and categories it belongs to.
| Topology | Boost, Flyback, Forward | Control mode | Current |
| Duty cycle (max) (%) | 100 | Switching frequency (max) (kHz) | 500 |
| Features | Error amplifier, Multi-topology | UVLO thresholds on/off (V) | 8.4/7.6 |
| Operating temperature range (°C) | -55 to 125 | Rating | Military |
| Gate drive (typ) (A) | 1 | Vin (max) (V) | 30 |
FAQs
What is UC1843J?
The UC1843J is a high-performance current mode PWM controller integrated circuit designed by Texas Instruments. It is commonly used in power supply applications such as DC-DC converters, battery chargers, and LED drivers.
How Does UC1843J Work?
The UC1843J operates as a current mode PWM controller, providing precise control of the power supply output. It regulates the duty cycle of the switching transistor based on the feedback from the output voltage and current, ensuring efficient power conversion and stable operation.
How Many Pins does UC1843J have and What are the Functions of the Pinout Configuration?
The UC1843J is available in various packages, such as 8-pin SOIC (Small Outline Integrated Circuit) and 8-pin PDIP (Plastic Dual In-Line Package). The pinout configuration typically includes:
- VCC: Power supply pin.
- RT/CT: External timing resistor/capacitor pin.
- COMP: Compensation pin for loop stability.
- CS: Current sense input pin.
- FB: Feedback input pin for output voltage regulation.
- OUT: Output driver pin for the power switch.
- GND: Ground reference pin.
What are the Pros and Cons of UC1843J?
Pros:
- High Performance: Offers precise current mode control for efficient power supply regulation.
- Flexible Design: Supports external components for adjustable frequency and duty cycle.
- Wide Application Range: Suitable for various power supply and converter designs.
- Overcurrent Protection: Includes built-in current sense and overcurrent protection features.
- Cost-Effective: Provides cost-effective solutions for power management applications.
Cons:
- External Components: May require additional external components for optimal performance and specific application requirements.
- Complexity: Requires careful design considerations, especially for loop stability and noise immunity.
- Package Size: The smaller package versions may present challenges for thermal management and PCB layout.
Are There Any Equivalents/Alternatives to UC1843J for Recommendation?
- The UC3843 from Texas Instruments is a higher current version of the UC1843J, suitable for higher power applications.
- Alternatives to the UC1843J include the NCP1200 from ON Semiconductor and the SG3524 from STMicroelectronics.
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