CHL8103-17CRT

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Introduction
CHL8103-17CRT is a high efficiency synchronous buck switching regulator that utilizes a power switch to efficiently reduce an input voltage down to a required output voltage level. This powerswitch is a virtually indestructible component which, when combined with a variety of control schemes, allows the CHL8103-17CRT to achieve conversion efficiencies of up to 95%.

Application Field
The CHL8103-17CRT can be applied in a wide range of power applications such as personal computers, servers, gaming consoles, and embedded systems. It is designed to work with a wide range of input voltage levels including up to 25. 5V and be capable of providing up to 12A of output current. Furthermore, this device can operate with a switching frequency up to 2.4 MHz and offer easily programmable features for exact control.

Working Principle
The CHL8103-17CRT utilizes a single-switch buck topology to convert an unregulated DC voltage to lower regulated output voltage. This single-switch topology works by having a MOSFET transistor switch between open and closed positions to regulate current flow. When the switch is closed, current will flow from the input voltage source through the switch’s finite on resistance and then to the output thus decreasing the input voltage to the desired output level. The current then continues to flow through the resistor and diode in the output loop until the switch is opened and current returns to the input voltage source. This single-switch topology is efficient in achieving a low output voltage however, it depends heavily on a stable feedback loop to maintain the voltage regulation.

The CHL8103-17CRT is designed to operate with a constant ON-time control method which works by setting the ON-time period based on the desired output voltage level. A voltage sense feedback signal is sent to the control circuitry to compare the actual output voltage with the desired output voltage. If the actual voltage is greater then the desired voltage, the ON-time period is reduced and if it is lower it is increased. This ON-time control method is able to maintain the output voltage with a small amount of error once the device is properly set.

Conclusion
The CHL8103-17CRT is a high efficiency synchronous buck switching regulator that utilizes a power switch to efficiently reduce an input voltage down to a required output voltage level. It is a great choice for applications that require a high efficiency, fast operation, and stable output voltage. The switch is virtually indestructible and the operating frequency can be easily programmed up to 2.4 MHz. Further, this device works with a wide range of input voltage levels including up to 25. 5V and can provide up to 12A of output current.

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