The UCC3808AD-1 from Texas Instruments is a versatile and efficient low-power pulse width modulation (PWM) controller designed for a wide range of power supply applications. This device is part of the UCC3808 family, which is known for its low startup and operating current features. It is particularly suitable for off-line and DC-to-DC converter applications that require a minimal standby power consumption to meet stringent energy efficiency standards.

Key Features

• Low Startup and Operating Current: The UCC3808AD-1 boasts a startup current of typically 0.15 mA and an operating current of 1.1 mA, making it an energy-efficient choice for modern power systems.
• Current-Mode Control: Its current-mode control provides improved transient response and simplified loop compensation over voltage-mode control.
• Programmable Soft Start: The soft start feature limits inrush current during startup, which helps prevent system stress and extends the life of the power supply.
• Frequency Foldback: The device includes frequency foldback capability, reducing switching losses during short-circuit and overload conditions by decreasing the switching frequency.
• Trimmed Oscillator Discharge Current: This feature ensures precise frequency control over temperature and process variations.

Applications

The UCC3808AD-1 is ideal for a range of applications, including:

• AC-DC power supplies for personal computers, servers, and TVs
• Isolated and non-isolated flyback converters
• Forward converters
• DC-DC modules
• Telecom power supplies
• Battery chargers

Technical Specifications

The UCC3808AD-1 is available in an 8-pin SOIC package and has the following technical specifications:

• Input Voltage Range: Up to 15V
• Switching Frequency: Up to 1 MHz
• Operating Temperature Range: -40°C to +85°C

With its robust feature set and high performance, the Texas Instruments UCC3808AD-1 PWM controller is an excellent choice for designers looking to create efficient and reliable power supply systems.