Series:	*
Part Status:	Obsolete

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Introduction

CHL8325A-42CRT is a DC-DC Switching Controller from the PMIC (Power Management Integrated Circuit) Voltage Regulator family developed by e-Micron Technology Corporation. It is a highly integrated solution suitable for PC, server, home appliance and consumer equipment. The CHL8325A-42CRT DC-DC Switching Controller has variable frequency and voltage mode, which makes the application field and working experience more flexible.

Application Field of CHL8325A-42CRT

CHL8325A-42CRT DC-DC Switching Controller works best in PC, server, home appliance and consumer equipment. It is well-suited for applications where power efficiency and size requirements demand high-efficiency DC-DC conversion. The Controller can support the input voltage range from 0.6V to 5.5V, and the output current of up to 12A continuous with a peak current of 18A. It is also capable of delivering up to 5W of power output, due to its highly efficient 80V/20µs maximum current-limit protection.The Controller is available with a variety of configurable options, including spread spectrum, adaptive frequency spreading and external loop compensation, as well as an adjustable voltage sense voltage and refresh frequency for optimal operation. This makes it suitable for applications requiring precise control and performance, such as the precise regulation of current or voltage.

Working Principle of CHL8325A-42CRT

The working principle of CHL8325A-42CRT DC-DC Switching Controller is based on the use of a Pulse Width Modulation (PWM) technique to provide an optimum boost or buck between the input voltage and the output voltage. The PWM technique ensures that the output voltage is consistent and can be regulated in order to avoid overvoltage and undershooting.The CHL8325A-42CRT has a power MOSFET bridge circuit at its core, which consists of two high-current MOSFETs operating in parallel. When the PWM signal is activated, the MOSFETs alternately switch between the input voltage and the output voltage, thus producing a voltage-regulated output.The CHL8325A-42CRT also has an internal soft-start circuit that prevents brief overcurrents when the PWM switches from low to high. This soft-start circuit helps increase system reliability.The CHL8325A-42CRT has adjustable protection features, such as input-voltage undervoltage lock-out, output overvoltage protection, and overcurrent protection. The Controller is available with shutdown logic, which helps protect the MOSFETS in the event of a power failure.

Conclusion

The CHL8325A-42CRT DC-DC Switching Controller is an ideal solution for PC, server, home appliance and consumer equipment applications that require precise control and performance. It is highly efficient, easy to use and can be configured in order to provide optimum performance. The Controller also offers a range of adjustable protection features and shutdown logic for increased system reliability.

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