CHL8103-18CRT

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CHL8103-18CRT Application Field and Working Principle

The CHL8103-18CRT is classified as a DC DC switching controller, which is a class of CMOS-integrated Power Management IC (PMIC). This device offers a highly integrated solution for a wide range of applications, including non-isolated DC / DC converters, AC / DC adaptors, linear power supplies and more.

Features

The CHL8103-18CRT provides several features that make it a suitable solution for different applications:

• Automatic detection of reverse input voltage
• Automatic detection of overload and short circuit protection
• Integrated over temperature protection
• Programmable soft start
• Programmable switching frequency
• Programmable live cycle and dead time control

Working Principle

The CHL8103-18CRT works by regulating the output voltage of a power supply using the input voltage. The device relies on a digital Pulse Width Modulation (PWM) controller to regulate the supply by rapidly switching between the on and off states. When the PWM controller is on state, the voltage is applied to the load and when it is in off state, the voltage is cut off from the load. The on/off ratio of the PWM controller determines the output voltage, which is measured by the device’s voltage feedback circuit. If the output voltage deviates from the desired level, the device will adjust the on/off ratio accordingly to return it to the desired level.

The device also features a built-in safety mechanism to protect the supply from extreme conditions, such as overload and over-temperature. The device can detect if the output voltage is being overloaded and will immediately shut off to prevent any damage to the system. Additionally, the device will automatically shut off if the temperature exceeds a certain threshold.

Applications

The CHL8103-18CRT is suitable for a wide range of non-isolated DC / DC converters and AC / DC adaptors. It can be used in applications such as LED lighting, laser diode drivers, optical pickup drives, wireless charging, portable electronic devices, PC motherboards, and many more. This device is also suitable for linear power supplies, as they rely on a similar PWM-based regulation.

Conclusion

The CHL8103-18CRT is a highly integrated DC-DC switching controller that can be used for a wide range of applications. Its features include automatic reverse input voltage detection, overload protection, and adjustable soft start, live cycle, and dead time control. Additionally, the device can be used for non-isolated DC/DC converters, AC/DC adaptors, and linear power supplies.

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