NCP1063AD060R2G

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NCP1063AD060R2G is an offline switcher integrated circuit (IC) used in switch-mode power supplies (SMPS). It is a Pulse-Width Modulation (PWM) controller that operates in discontinuous current mode (DCM). The IC is designed primarily for unregulated and adjustable single-ended primary-side control solutions that require limited to no secondary-side feedback. It can achieve high efficiency by using low standby power and is suitable for a broad range of power supplies including lighting, adapters, chargers, and servers.

Working Principle

The NCP1063AD060R2G consists of a PWM control circuit, an internal oscillator, a thermal protection monitor, a low power POR circuit, and various protection functions. It is powered by the main power source, and its feedback circuits are monitored to maintain the voltage output.

The PWM controller uses a resonance inductor-capacitor (L-C) filter circuit and a low power POR manager connected to the inductor and capacitor. The circuit generates an alternating current (AC) signal with a frequency of about 67kHz. The PWM control portion includes control logic circuits, which generate and drive the high-side MOSFET and low-side MOSFET, and sense voltage and current. The PWM control circuit adjusts the duty cycle in response to load changes and maintains constant output voltage.

The internal thermal protection monitor prevents excessive power dissipation and over-temperature conditions. In the event of an over-temperature condition, the PWM control circuit reduces the duty cycle limit, preventing the power loss from exceeding thresholds and reducing the output voltage. The PWM control circuit also includes a low power POR manager that helps reduce power dissipation during startup.

Features

The NCP1063AD060R2G has several features that enhance the efficiency of the switch-mode power supply. The frequency roll-off control (FROC) provides compensation for voltage and current ripple. The high-side gate drivers can be operated at a duty factor of 1:1. The maximum duty cycle of 1:1.9 improves efficiency at light loads. The frequency jittering reduces switching losses by using random frequency variations. The built-in over-temperature protection and input over-voltage protection further enhance the efficiency and overall reliability of the SMPS.

Application Field

The NCP1063AD060R2G is suitable for a variety of applications, including offline LED lighting, adapters, chargers, and servers. It can be used in switch-mode power supplies up to 60W. The IC is especially well-suited for applications requiring a wide input voltage range, high efficiency, and a minimum of secondary-side feedback. The IC also offers a low standby power consumption, making it a good choice for low power applications.

The NCP1063AD060R2G provides designers with a solution to efficiently control switch-mode power supplies in applications requiring a wide input voltage range, high efficiency, and limited to no secondary-side feedback. Its features and capabilities make it an attractive solution for a variety of applications.

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