L9659

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The L9659 is a specialized switch-mode power supply from STMicroelectronics. It is a highly integrated device that integrates an adjustable output voltage regulator, an adjustable output voltage regulator, an LED driver for LED load dimming, two low-saturation FETs, and a programmable soft-start circuit. This device is used in a wide variety of applications, including home appliances like washing machines, industrial applications like inverters, and automotive electronics.

The L9659 is a single-chip power controller with a comprehensive power management system. It integrates a DC-DC converter and a boost regulator to provide a regulated output voltage from a wide range of input voltage sources. The DC-DC converter provides a wide range of output voltage and current settings, while the boost regulator ensures a constant output voltage. Both regulators can be configured to produce either a constant-current or a single-ended output.

The regulator also includes an adjustable current limit function. This function allows the device to limit the output current to a desired level in order to maintain stability and reduce the risk of overtaxing the power supply. The device also includes protection features such as thermal shutdown, overvoltage protection, and over-current protection.

The L9659 also includes a programmable soft-start circuit. This circuit gradually increases the output voltage of the regulator, preventing it from over-stressing the circuit. This feature can be used in applications where the system is prone to inrush currents, such as when a motor is anticipated to start. The device can also be configured to maintain the last programmed voltage setting.

In addition to the basic regulator functions, the L9659 also incorporates a low-saturation FET to provide power to LEDs. This feature provides a more efficient and cost-effective method for dimming LED displays and lighting, compared to other methods such as using a PWM controller.

The L9659 also includes several diagnostic functions. The device contains a Power-on-Reset (POR) circuit that can detect voltage abnormalities and reset the circuit. It also includes an integrated temperature monitor that can detect over-temperature conditions and automatically shut down the circuit in order to protect the system.

The L9659 is an ideal solution for applications that require an efficient and versatile power control solution. Its extensive feature set and configurable design make it suitable for a wide range of applications. From home appliance electronics to inverters and automotive electronics, the device can provide the power management system needed to run these applications safely and reliably.

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