L6599AN

Power Supply Controllers, Monitors

The L6599AN is a monolithic integrated switching regulator controller with a wide scope of application areas. It operates with a wide range of input voltages - from 7V to 40V. The device integrates several essential functions such as thermal shutdown, cycle-by-cycle current limiting, fast load transient response, and low standby power dissipation. In addition, its performance allows superior power supply reliability.

Application field

The L6599AN can be used to control a switching regulator in a number of different applications such as LED lighting, LCD monitors, and power supplies. It is especially well suited for LED lighting applications where dimming is required. It allows precise brightness control and eliminates the need for a device or circuit to manually select the output voltage or current. Additionally, the device supports various types of dimmer switches, including rotary, programmable and touch dimmers, which provide further control.

The device is also suitable for LCD monitor control. It has a wide range of input voltage support, good current/voltage stability, and a low start- and off-time, making it an ideal choice for LCD applications. Finally, the device can be used in power supplies, allowing for high efficiency and good reliability. The L6599AN can also be used to reduce the switch on/off times and thus increase the efficiency of the power supply.

Working Principle

The L6599AN operates by using a feedback loop. The output voltage is compared with a reference voltage and the difference is used to control the switching of the MOSFET. If the output voltage is larger than the reference, the duty cycle of the MOSFET switch is decreased, and if the output voltage is lower the duty cycle is increased. This closed-loop operation allows precise control of the output voltage while keeping the power dissipation low.

In addition to the feedback loop, the device also houses a number of protection features. These features help keep the device from becoming damaged should it encounter a short-circuit, over-voltage, or over-current conditions. The thermal shutdown feature automatically shuts down the device if the temperature exceeds a certain threshold. This prevents further damage, as the device is not allowed to operate if it is too hot.

Conclusion

The L6599AN is a monolithic integrated switching regulator controller with a wide scope of application areas. It is suitable for LED lighting, LCD monitors, and power supplies. Its features include fast load transient response, low standby power dissipation, built-in thermal shutdown and cycle-by-cycle current limiting. Its performance allows superior power supply reliability, making it an ideal choice for these applications.