UC3844N – UNITRODE
PWM Controller, TI UC3844N, 30V-10V, 450kHz, 13.5V/1A Out, DIP-8
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Overview
The UC3844N is a fixed-frequency current-mode PWM controller manufactured by UNITRODE (now Texas Instruments). This integrated circuit is designed for off-line and DC-to-DC converter applications, providing a cost-effective solution with minimal external components. The device operates at frequencies up to 450 kHz and features an output drive capable of sourcing 1A peak current. It is housed in an 8-pin DIP package.
Key Features
- Current-mode control operation
- Optimized for off-line converters
- High-current totem-pole output
- Undervoltage lockout with hysteresis
Applications
This PWM controller is commonly used in various power supply designs where efficient power conversion and precise output regulation are required. Its current-mode architecture provides inherent line feedforward, simplifying design and improving transient response. The UC3844N is suitable for a range of power electronics applications.
- Switch-mode power supplies (SMPS)
- DC-DC converters
- Battery chargers
