Texas Instruments

UCC3803DTR

The UCC3803DTR is a high-voltage, high-power PWM (Pulse Width Modulation) controller from Texas Instruments. It is designed for use in a variety of power conversion applications, including offline power supplies, DC-DC converters, and motor control circuits.

Description:

The UCC3803DTR is a monolithic integrated circuit that provides all the necessary features for a PWM controller. It includes an error amplifier, oscillator, reference voltage source, and protection circuits. The device is available in a thermally enhanced 24-pin SSOP (Shrink Small Outline Package) package.

Features:

• High-voltage operation up to 500V
• Wide input voltage range of 4.5V to 40V
• Fixed 50kHz switching frequency
• External clock input for frequency synchronization
• Soft-start and burst mode operation
• Overload protection with auto-restart
• Under-voltage lockout (UVLO) protection
• Open-loop protection
• Thermal shutdown protection
• External compensation for improved stability

Applications:

The UCC3803DTR is suitable for a wide range of power conversion applications, including:

1. Offline power supplies
2. DC-DC converters
3. Motor control circuits
4. Battery chargers
5. Inverters
6. Welding equipment
7. Uninterruptible power supply (UPS) systems
8. Power factor correction (PFC) circuits

In summary, the UCC3803DTR is a versatile and feature-rich PWM controller that can be used in a variety of power conversion applications. Its high-voltage operation, wide input voltage range, and comprehensive protection features make it a popular choice for designers looking to implement efficient and reliable power conversion solutions.