UC3843BNG onsemi

Here is the English description of the UC3843BNG chip:

• Function: Step-Down DC-DC Controller
• Input Voltage Range: 4.5V to 42V
• Output Voltage: Adjustable
• Switching Frequency: 100kHz to 300kHz
• Package: SOIC-8

The UC3843BNG is a step-down DC-DC controller from Texas Instruments.

Key Features:

• Precise constant frequency current mode control
• Adjustable output voltage over a wide input range
• Compensation pins simplify loop design
• Small SOIC-8 package reduces PCB space
• Long established design supports robust operation

Common Applications:

• Offline buck converters (100-240VAC input)
• Industrial power supplies with broad input tolerance
• Where proven control technique is required

Benefits include a reliable regulator solution across a wide voltage range using an established control method. Compact SOIC-8 package suits integration.

Well-suited for applications requiring adjustable regulation over varying high-voltage inputs, such as offline power supplies.

In summary, the UC3843BNG provides stable constant frequency control from 4.5V up to 42V inputs in a space-saving package.

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