CHL8328-16CRT

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PMIC Voltage Regulators have become an integral part of modern electrical systems. Their application fields range from consumer electronics to automotive, and from industrial to commercial. The CHL8328-16CRT is an integrated voltage regulator from Texas Instruments designed for Point-of-Load applications such as FPGAs and microcontrollers. In this article, we will discuss the application field and working principle of this particular device.

The CHL8328-16CRT is part of the DCAP Point-of-Load integrated voltage regulator series and is designed for use in high current, low voltage applications. It includes both a switching regulator and a low dropout (LDO) linear regulator in a single package, which saves space on the board and eliminates the need for multiple regulators. This makes it ideal for applications with limited board space, such as embedded devices and mobile devices.

The switching regulator has an output voltage of 0.6V - 3.3V and is capable of delivering up to 10A of output current. Its high switching frequency means that it is able to support high current loads with minimal switching losses. It also features an advanced control algorithm which significantly reduces power loss and effectively eliminates load transients.

The CHL8328-16CRT also features a low dropout (LDO) linear regulator which provides up to 3A of output current and a variable output voltage range of 0.8V - 1.6V. This regulator has a very low dropout voltage and can maintain an accurate output voltage even with large load transients.

The device also includes built-in protection and diagnostics features such as overvoltage, overcurrent, and over-temperature protection. It also has a configurable under-voltage lockout and programmable soft-start which allows for greater flexibility in system design.

The CHL8328-16CRT is capable of operating over an extended temperature range, which makes it suitable for industrial, automotive, and outdoor applications. It also features Adaptive Loop Compensation which improves the transient response of the system, as well as Interfaces such as I2C for direct control of the device.

The working principle of the CHL8328-16CRT is based on the inductor-capacitor-resistor (LCR) circuit. This is a closed loop system where the output voltage is regulated by controlling the current flow through the inductor-capacitor-resistor. When a load is applied, the current flow through the inductor increases and induces a voltage in the inductor. This voltage is regulated by the adaptive loop compensation, which adjusts the voltage according to the load condition.

The switching regulator uses a pulse-width modulation (PWM) control circuit to generate the output.The PWM circuit switches the current flow through the inductor at a very high frequency. The adjustable duty cycle controls the amount of energy stored in the inductor, which in turn adjusts the output voltage. The LDO linear regulator is controlled by a voltage feedback loop which detects the output voltage and adjusts the current flow to maintain the desired output voltage.

In conclusion, the CHL8328-16CRT is a special-purpose integrated voltage regulator designed for high current applications. It features a switching regulator and an LDO linear regulator which allow it to support both high current and low voltage loads. It also includes advanced protection and diagnostic features, as well as an extended temperature range, making it suitable for a wide range of applications.

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