CHL8103-05CRT

Series:	*
Part Status:	Obsolete

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CHL8103-05CRT Application Field and Working Principle

Introduction to PMICs, Voltage Regulators and DC-DC Switching Controllers

Power management integrated circuits (PMICs) are integral components in modern electronics and consumer products. Through their ability to efficiently regulate sophisticated voltage and current delivery in a wide range of applications, PMICs have allowed for the miniaturization of everything from smartphones to smart home appliances.Voltage regulators are a type of PMIC that adjust a DC voltage to a set level. They can either be linear regulators, which adjust the voltage by dissipating excess power causing a drop in voltage, or switching regulators, which use high frequency switches to reduce the output voltage to the desired level.Switching regulators are further divided into two categories: DC-DC switching regulators, which adjust the voltage by switching elements such as transistors, and DC-AC switching regulators, which use changing capacitors or inductors to adjust the voltage. DC-DC switching controllers are voltage regulators that directly control and adjust the output voltage of a power supply or power conversion system. They adjust the output voltage through feedback or pulse-width modulation (PWM) to achieve a stable and precise output voltage.

CHL8103-05CRT Overview

The CHL8103-05CRT is a DC-DC switching controller that is designed for a wide range of applications. It is capable of regulating voltage from 0.6V-80V up to a maximum of 3A. It features high efficiency and low peak current limit, making it ideal for applications ranging from general power supplies, to distributed-power applications such as automotive and industrial systems.The CHL8103-05CRT enables the use of wide-voltage, dual-phase switching power supplies from a single output and it supports a wide range of topologies. These topologies include single-ended primary topologies such as buck, boost and SEPIC, and non-isolated, forward and flyback topologies for dual-phase operation. It also integrates additional features such as Synchronous Rectification (SMPS), Protection against Overcurrent and Overvoltage, and Over Temperature Protection.

CHL8103-05CRT Working Principle

The CHL8103-05CRT is based on a Pulse Width Modulation (PWM) topology. It uses a pulse width modulation (PWM) technique to control and regulate the output voltage of the switching power supply. The CHL8103-05CRT is designed with a built-in control oscillator, which is the main frequency generator. The output of this oscillator is divided into two phases by a divider chain, and each phase is used as the output pulse for a switch in the switching power supply. The two switches in the PWM task can be either N-channel MOSFETs or P-channel MOSFETs, depending on the topology implemented. These switches operate in a zero-voltage switching (ZVS) or zero current switching (ZCS) mode and the output voltage of the power supply is controlled by modifying the duty cycle of the PWM output.By controlling the duty cycle of the PWM output, the CHL8103-05CRT can regulate the output voltage of the power supply within a preset window. The output voltage is monitored by a feedback circuit and the duty cycle of the PWM output is adjusted in order to maintain the set voltage. In addition, the CHL8103-05CRT also offers the option of adjusting the voltage through the use of an external programming voltage.

Conclusion

The CHL8103-05CRT is a DC-DC switching controller designed for a wide range of applications. It is capable of regulating voltage from 0.6V-80V up to a maximum of 3A and features high efficiency and low peak current limit. It is based on a Pulse Width Modulation (PWM) topology and is designed with a built-in control oscillator, which is the main frequency generator for the PWM task. The output voltage of the power supply is regulated by modifying the duty cycle of the PWM output and maintaining the output voltage within a preset window.

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