UCC2540PWP

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

PMIC - Power Supply Controllers, Monitors - UCC2540PWP application field and working principle

The UCC2540PWP is a synchronous, primary-side regulated, current-mode, PWM controller that is ideal for regulating Half-Bridge (HB) and Full-Bridge (FB) PWM converters. It has a high-voltage start-up control circuit that is well-suited for a wide variety of HB topologies, including high power factor (HPF) circuits. With its light load efficiency and current-sense accuracy, the UCC2540PWP provides stable operation over a wide input supply range, making it suitable for use in many applications.

Features of the UCC2540PWP include:

• External current-sense pin pulls high output currents
• Maximum of 25V on internal control loop enable
• Gate Driver Supply range of 8-20V
• 4-bit binary programming for Gate Driver current limit
• Integrated voltage reference and comparator
• New sensing algorithm for improved accuracy of current sense pin

The UCC2540PWP was designed for synchronizing, regulating and controlling the on-time and off-time for the synchronous rectifier (SR). This IC is ideal for HB and FB PWM converters, especially those with a constant-voltage output, such as offline AC/DC, dc/dc and lighting applications. This chip offers improved load and line regulation, low quiescent current, and requires less space compared to traditional PWM controllers.

The primary side-controlled PWM controller is based on a current-mode control scheme which provides several advantages in controlling power supplies. Firstly, it eliminates the need for an optocoupler or other form of electrical isolation, which simplifies design and reduces cost. Secondly, it eliminates the need for a slope-compensation circuit, resulting in a smaller overall solution size. Thirdly, it reduces the overall transient response time, which improves load and line regulation.

The UCC2540PWP is well-suited for HPF converters due to its high-voltage start-up control circuit. The high-voltage start-up enables the converter to start up immediately even when it is connected to a high voltage source. Its light load efficiency and current sense accuracy offer stable operation over a wide input supply range, making the UCC2540PWP a great choice for applications using HPF converters.

In terms of functionality, the device includes an adjustable current limit, programmable soft-start time, frequency range, internal PWM frequency oscillator, pre-biased voltage start-up control circuit, oscillator synchronization and a green-mode function. Additionally, it features under-voltage lockout (UVLO) capabilities and a low-power sleep mode. The low-power sleep mode reduces power consumption while operating in light load conditions to conserve energy.

In summary, the UCC2540PWP is a versatile, synchronous, primary-side regulated, current-mode, PWM controller that is ideal for regulating Half-Bridge (HB) and Full-Bridge (FB) PWM converters. It offers improved load and line regulation, low quiescent current, and requires less space compared to traditional PWM controllers, making this an ideal choice for regulating HPF converters. It also includes several features such as adjustable current limit, programmable soft-start time, frequency range, internal PWM frequency oscillator, pre-biased voltage start-up control circuit, oscillator synchronization and a green-mode function.

The specific data is subject to PDF, and the above content is for reference