UC3845 Current Mode PWM Controller IC SMD Package

UC3845 Current Mode PWM Controller IC SMD Package 

The UC3845 is a high-performance current-mode Pulse Width Modulation (PWM) controller IC designed for switch-mode power supplies (SMPS) and DC-DC converter applications. Operating with a fixed switching frequency and precise current control, the UC3845 provides excellent stability, fast transient response, and inherent over-current protection, making it ideal for high-efficiency power designs.

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Key Features

• IC Type: Current Mode PWM Controller
• Model: UC3845
• Package: SMD (Surface Mount Device)
• Current-mode control for improved loop stability
• Fixed switching frequency (set by external RC network)
• High output drive capability for MOSFETs
• Built-in under-voltage lockout (UVLO)
• Cycle-by-cycle current limiting
• Low startup current
• Duty cycle up to 50%

Typical Applications

• Switch-mode power supplies (SMPS)
• AC-DC and DC-DC converters
• Flyback and forward converters
• Battery chargers and adapters
• Industrial and embedded power systems
• DIY and educational power electronics projects