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The UC3843 is a high-performance current-mode PWM controller IC designed for off-line and DC-to-DC converter applications. It provides fast overcurrent protection and precise duty cycle control, making it ideal for switch-mode power supplies (SMPS), isolated flyback, and forward converters. Its internal oscillator, error amplifier, and reference voltage regulator simplify the overall design process for power conversion circuits.
Packaged in an easy-to-use DIP-8 form factor, the UC3843 is widely used in industrial, automotive, and consumer electronic systems.
Features of UC3843 PWM Controller IC:
- Fixed-frequency current-mode PWM control
- Low startup and operating current for high efficiency
- Fast overcurrent response with cycle-by-cycle current limiting
- High output drive capability (up to 1A)
- Trimmed oscillator for precise frequency control
- Undervoltage lockout with hysteresis
- DIP-8 through-hole package for easy prototyping
- Ideal for SMPS, flyback, and forward converter designs
Specifications of UC3843 IC:
- Model: UC3843
- Function: Current Mode PWM Controller
- Supply Voltage Range: 8.5V to 30V
- Oscillator Frequency: Up to 500 kHz
- Output Current: 1A
- Startup Current: <1mA
- Operating Current: ~17mA (typical)
- Package: DIP-8 – Through-Hole
- Operating Temperature: -40°C to +85°C
Package Includes:
1 × UC3843 Current Mode PWM Controller IC – DIP-8 Package
Returns Policy
Due to the type of products we sell, we accept limited returns. Below are the conditions where we can accept a return request.
1. Damaged During Shipment
If you receive a product damaged during shipment, please notify us within the 3 days of you receive the product, supported by the proper pictures and description. Once our support team accept the return, we will provide a replacement or a complete refund including the return shipping cost.2. Wrong Item Shipped
If your item looks different from what is shown in the image on our website, we will take the item back and provide a refund or replacement as per your choice.
Limitation of Returns
We don't accept the returns for the products damanged by improper use of the product. Moreover we don't accept the return, if the ordered product is not fit for any specific application. Please read the product specifications and datasheet before selecting and ordering a product. Returns are accepted only with 3 days from the date of delivery.Shipping
We ship to all over India with free shipping on all prepaid orders above 500. For Cash on Delivery orders INR 80 will be charged for orders below INR 599 and INR 30 will be charged for the orders above 599. Please contact to our support team at support@quartzcomponents.com for any question related to shipping.
Please note that the Minimum Order Value is INR 500 for COD orders.