L4976

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

L4976 is a monolithic integrated circuit specifically designed for DC to DC converter applications requiring a high switching frequency and high input voltage. This device employs an advanced voltage regulator control scheme that offers improved dynamic performance, wide input voltage range and low noise operation. By driving an external MOSFET with an inverted PWM signal, the device provides high current outputs and can operate over a wide input voltage range.

L4976 can be used in a variety of applications such as isolated power supply, DC/DC converter, voltage mode/current mode/constant frequency control, ZVS/ZCS voltage converters, LED lighting and more. The device operates with a switching frequency of up to 500 kHz and is capable of delivering a maximum current of 1 A. Additionally, it features a low voltage dropout, adjustable output voltage and an output short-circuit protection.

The working principle of L4976 is based on its control scheme, which includes a PWM generator, an error amplifier, an oscillator, a current sense comparator and a driver. The PWM generator produces an inverted output which is used to drive the external MOSFET of the power stage. The error amplifier compares the reference voltage set by a voltage divider network with the feedback voltage provided by the external feedback pin. The output of the error amplifier is used to modulate the duty cycle of the PWM generator. The oscillator sets the frequency of the PWM output and the current sense comparator is used for current limiting and output short-circuit protection.

In summary, L4976 is a high-performance DC to DC switching regulator, capable of operating at up to 500 kHz, with high input voltage capabilities, adjustable output voltage and low dropout voltage for consumer, industrial and automotive applications. Its control scheme includes a PWM generator, an error amplifier, an oscillator, a current sense comparator and a driver. This device is designed to offer improved dynamic performance, wide input voltage range, and low noise operation.

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