UC2526ANG4

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The UC2526ANG4 is a high performance, monolithic switching regulator control circuit specifically designed to implement a switch mode power supply in fixed frequency, PWM mode of operation. This combination of features makes the UC2526ANG4 an ideal choice for low-cost, high-performance dc-to-dc switching regulator applications. The UC2526ANG4 provides a true single chip solution using a single phase converter with a unique, high slew rate third-order switching architecture and high efficiency control, providing improved system performance and reduced parts count.

This integrated circuit is ideally suited for consumer and industrial computer related supplies, low power dc-dc applications, and other power supplies where the PWM architecture, low power dissipation and high efficiency are essential.

The UC2526ANG4 operating principles are based on the basic topology of a power factor corrected full bridge converter circuit. This is an extension of the traditional switcher architecture and provides superior control of the full bridge converter, which provides low total harmonic distortion (THD) and an optimized power factor correction (PFC).The UC2526ANG4 offers a wide voltage output range, low power dissipation, and improved current ripple control. The UC2526ANG4 is also designed to improve system efficiency and reduce total system cost.

The UC2526ANG4 is an isolated, negative voltage full bridge PFC converter, with a voltage feedback loop and dynamic voltage calibration (DVC) circuitry. It also includes Error Amplifier, Comparator, and Internal Gate Driver circuits in order to enable current-mode control of the main power switch.

The UC2526ANG4 features a wide input voltage range, low power dissipation, low switching losses, and improved system stability. Its adjustable current limit circuit protects the converter from excessive load current. Its switching frequency is adjustable from 15kHz up to 500kHz, allowing for a wide range of operating conditions and optimized circuit performance.

The low quiescent current capability of the UC2526ANG4 also contributes to its efficiency and total system cost. This is achieved by its Over Voltage Check Delay circuit, that limits power dissipation and improves current ripple control, and by its wide input voltage range, which takes into account input voltage variations. The UC2526ANG4 also includes a low-voltage protection circuit, that ensures that the system remains operational for a wide input voltage range.

The UC2526ANG4 is designed for highly efficient power supplies in TV, audio, computer, portable devices and general industrial applications. Its low power dissipation and low quiescent current provide excellent thermal and power budget performance, as well as its adjustable current limit and improved system stability.

In conclusion, the UC2526ANG4 is an ideal choice for applications such as TV, audio, computer and other power supplies, where high efficiency and low power dissipation are critical. Its adjustable current limit circuit, wide input voltage range, low power dissipation, and improved system stability make it an attractive choice for low-cost, high performance dc-to-dc switching regulator applications.

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