S-8333ABBA-T8T1G

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Power Management Integrated Circuit (PMIC) is an integral part of modern electronic systems. PMICs have several on-chip components with multiple functions that include amplification, regulation, and switching. One of the main components of PMIC is voltage regulators, they regulate the voltage and correspondingly the current supplied to the load, allowing consistent and controlled voltage delivery. DC DC switching controllers, a specialized form of voltage regulator, are used to operate and control the actions of DC-DC converters. The S-8333ABBA-T8T1G is a DC DC switching controller and its application field and working principle is discussed in the following sections.

Application Field

S-8333ABBA-T8T1G is a DC DC switching controller manufactured by Sanken Electric. It is used to optimize the power management circuit of portable equipment such as laptop computers and cellular phones. This product is suitable for various applications due to its wide range of operating voltage of 3.3V, 1.8V, 1.2V and 0.9V. Moreover, its internal voltage regulator provides galvanic isolation to the power supply. This enhances the safety and reliability of the products.

The device also features an automatic step-up/step-down buck topology and a peak switching current of 2 A. This provides an improved efficiency and an enhanced power delivery capability in a wide range of applications. With a minimum operating voltage of 0.9V, this switching controller can step up the voltage to a maximum of 24V, making it ideal for applications such as motor control and power management of LCD/LED displays.

Working Principle

The S-8333ABBA-T8T1G DC DC switching controller employs a buck-boost converter topology, which is a combination of step-up (buck) and step-down (boost) modes of operations. This allows the converter to regulate input voltages of both below and above the output voltage. When the output voltage is below the input voltage, the boost mode is enabled for enhanced power delivery. On the other hand, when the output voltage is higher than the input voltage, the buck mode is enabled for efficiency improvement.

This switching controller also features a hysteretic pulse width modulation (PWM) control scheme. In this technique, a comparator compares the output voltage with a reference voltage and based on the comparison, the duty cycle of the switches is adjusted. This duty cycle determines the effective output voltage resulting in a narrow output voltage range and improved regulation accuracy.

The S-8333ABBA-T8T1G DC DC switching controller also features over-temperature protection, over-current protection, and over-voltage protection. These features ensure that the performance of the device is not degraded under various fault conditions and the end user is protected from any unwanted operation.

Conclusion

To conclude, the S-8333ABBA-T8T1G is a DC DC switching controller designed by Sanken Electric, suitable for use in a wide range of portable equipment such as laptop computers and cellular phones. It utilizes a buck-boost topology to allow regulating of voltage below, above and equal to the output voltage. Moreover, it also features a hysteretic PWM control scheme for improved regulation accuracy and over-temperature, over-current and over-voltage protection for enhanced safety and reliability.

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