UCC3800NG4

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The UCC3800NG4 is an integrated circuit, which is classified under PMIC - Voltage Regulators - DC DC Switching Controllers. It is an offline circuit that acts as a voltage regulator and includes a switch-mode power supply (SMPS) controller. This integrated circuit (IC) performs the essential functions of providing power control and overall regulating of the output voltage of a power supply system. The UCC3800NG4 is particularly suitable for use in consumer electronics like plasma and LCD televisions, digital video recorders and home theatre systems. Additionally, it is also applicable to use in TV-reception related devices such as DVD players and digital satellite set top boxes.

The UCC3800NG4 consists of the main regulator block and the synchronous rectification controller. The main regulator block contains the error amplifier, comparator, reference, thermal protection and frequency modulation circuits. The controller section provides the basic switching functions and the features which allow the IC to operate in the voltage regulation mode and the pulse-by-pulse current limit mode. The UCC3800NG4 is capable of switching frequencies up to 1MHz and it supports a wide range of input voltages from 4.5V to 40V. The IC operates with a minimum of external components, is adjustable and requires no manual settings, and also has a power-good output.

The UCC3800NG4 operates in two different modes. In voltage regulation mode, the output voltage is regulated by the internal controller of the IC. During this mode of operation, the output current is limited to a maximum value that the controller defines. This is to prevent any damage to the system due to current surge. When the load current exceeds the maximum limit, the IC will shut down to protect the system.

The second mode of operation is the pulse-by-pulse current limit mode. This mode can be used when the load currents of the system are variable. In this mode, the IC cycles through its operating states in the same fashion as in voltage regulation mode, but only up to a certain current level. Once the current reaches this limit, the IC enters a low duty-cycle state, where it can prevent over-current conditions without shutting down the power supply system. This makes the UCC3800NG4 very suitable for applications where the load current can fluctuate over time.

The UCC3800NG4 is a highly reliable, compact and cost-effective voltage regulator system that offers multiple attractive features. Its superior power control performance, adjustable regulated output and adjustable current limit ensure reliable operation in challenging conditions. It is suitable for both constant current and constant voltage regulation in a wide array of embedded power applications. This IC is an ideal choice for modern electronic systems, where cost-efficiency and reliability are of paramount importance.

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