UCC2808AN-1G4

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The UCC2808AN-1G4 is an integrated offline switcher controller from Texas Instruments offering a high-performance, current-mode control solution for flyback and other topologies. It is a part of Texas Instruments\' Universal Generic Offline Switcher family, and it includes a programmable oscillator, precision high-voltage current sensed circuitry, and functions such as overvoltage protection. It is intended for use in providing design and application flexibility while simplifying system design and reducing component count, cost and solution size.

The UCC2808AN-1G4 can be used in a variety of power conversion applications requiring current-mode control. It operates over a wide input voltage range of 8V to 60V, allowing for efficient and highly reliable AC-DC power conversion. It features low start-up and operating current, allowing for extremely efficient operation, and operates at up to 100% duty cycle for minimum input voltage dropout. It also has integrated and adjustable overvoltage, surge and latch protection.

The UCC2808AN-1G4 supports both single-ended and flyback topologies and is suitable for low-cost, low-noise and low-part-count power designs. It does not require an external compensation network and its integrated oscillator frequency is adjustable for wide-range design flexibility. Additionally, its output is adjustable from 5V to 100V, and its programmable Hiccup Mode overcurrent protection provides robust protection when the output is overloaded.

The operating principle of the UCC2808AN-1G4 is based on current-mode control. Current-mode control is used in power supply designs to regulate output voltage or current by comparing the output current to a regulation current reference. This regulation current serves as the feedback loop, allowing the output current to be regulated as close to a specified value as possible. The UCC2808AN-1G4 uses an error amplifier to compare the voltage at the output of the regulator with a reference voltage, and then sends a signal to the control circuit such that the output varies in proportion to the difference in the input and the reference.

The UCC2808AN-1G4 is an ideal power management solution for a variety of off-line DC-DC converter applications requiring an efficient, low-part-count solution. It can be used in a wide variety of AC-DC converter applications requiring efficiency, low-noise, and high reliability from 8V to 60V input voltages, such as lighting, industrial, home automation and medical applications. Its programmable frequency and adjustable output voltage and current make it a great choice for cost-effective, low-part-count power supplies.

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