UC2842ANG4

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The UC2842ANG4 is a DC-to-DC switching controller. It is an off-line controller that operates in discontinuous conduction mode (DCM) and is used to regulate the output of flyback DC-to-DC converters. The UC2842ANG4 operates from a wide input voltage range of between 4 to 40 Volt, providing output currents of up to 500 µA in low duty cycle applications. It is ideal for applications requiring efficient, high voltage, high current DC-to-DC conversion.

The UC2842ANG4 has a switching frequency of up to 500 kHz and a wide temperature range of 40 degrees Celsius to +125 degrees Celsius. It offers protection against over-voltage, over-current, and over temperature conditions. Its latch-off capability significantly reduces the power dissipation during an over-current event.

The UC2842ANG4 also provides dynamic response characteristics in order to ensure output voltage regulation. It detects the output voltage and adjusts the switching current as required. The dynamic response is achieved by varying the off-time of the chip’s oscillator and, consequently, the pulse width.

The UC2842ANG4 provides a minimum operating frequency of 25kHz and a maximum operating frequency of 500kHz. It has a low quiescent current of 98µA and a low start-up current of 50µA. It has a low dropout voltage of 0.2V, making it ideal for applications that require low-input operating conditions.

The UC2842ANG4 has a number of applications, such as voltage regulators, LED drivers, AC/DC converters and power supply systems. It is particularly suitable for high-voltage, high-current DC-to-DC converters, such as flyback converters. In addition, it is optimized for mobile applications and is suitable for various mobile power management systems, including smartphones, tablets, and laptops.

The UC2842ANG4 is a highly efficient device with a wide range of adjustable characteristics and integrated protection functions. Its adjustable frequency and pulse width modulation, along with its internal low-side switch, offer a high level of flexibility for various design requirements. Its low thresholds, high-current capability, wide temperature range and excellent protection features make it an ideal choice for various DC-to-DC switching applications.

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