Product Overview: UCC3808 Low-Power BiCMOS Current-Mode PWM Controller

The UCC3808 from Texas Instruments is a versatile and efficient low-power pulse-width modulation (PWM) controller that operates under current mode control. This product is designed to cater to a wide array of power supply applications, including off-line and DC-to-DC converters that require low power operation.

With its BiCMOS construction, the UCC3808 series offers the perfect blend of power-saving features and advanced circuitry. The device is available in two different versions, UCC3808-1 and UCC3808-2, which provide options for different oscillator frequencies. The UCC3808-1 has a typical starting threshold of 16V with an operating range down to 8.5V, while the UCC3808-2 starts at 8.4V and operates down to 7.6V. These thresholds ensure that the device can maintain stable operation even under varying conditions.

Featuring a trimmed oscillator discharge current, the UCC3808 allows for precise frequency control. Additionally, the device includes an error amplifier, a current-sense comparator, and a high-current totem-pole output ideally suited for driving a power MOSFET. The under-voltage lockout (UVLO) both for start-up and operation ensures that the controller only operates when the supply voltage is sufficient, preventing malfunctions and enhancing system reliability.

The UCC3808 also boasts an automatic feed-forward compensation feature and a programmable soft-start function to minimize start-up stress on the system. Its low start-up and operating current (typically 0.5mA and 0.3mA respectively) make it an energy-efficient choice for modern power systems. Furthermore, the device has been designed with cycle-by-cycle current limiting and a latch-off feature for enhanced protection.

Texas Instruments' commitment to quality means that the UCC3808 PWM controller is built to meet the stringent requirements of power management designs. Whether you're developing power supplies for consumer electronics, telecom systems, or industrial equipment, the UCC3808 offers a reliable and high-performance solution.