MC1403D

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Introduction to MC1403D

The MC1403D is a PMIC (Power Management Integrated Circuit) voltage reference. It is specifically designed as a line follower in power supplies and has become a standard component in many electronic device designs. It has been proven to be very reliable and has been widely used in a variety of applications for several decades.

Applications

The MC1403D is used primarily as a line follower in power supplies, but it can also be used in multiple other applications such as voltage regulating and voltage stabilizing. It is often used in power supplies for logic chips, as it offers excellent voltage regulation, stable output, and a wide adjustment range.

The MC1403D is also popularly used in audio, video, and motor control circuits, where its’ ability to control the output voltage of an amplifier when the load varies, provides a stable and reliable output.

The MC1403D is also used extensively in embedded systems, home appliances, HVAC systems, UPS systems and much more.

Working Principle

The MC1403D voltage reference is designed around two basic principles, namely, voltage regulation and current limiting.

The MC1403D uses a negative-feedback loop to regulate the output voltage, which is derived from the input voltage and the voltage across the internal reference. This allows for accurate voltage regulation, even as the input voltage and load current vary.

The current-limiting feature of the MC1403D is created by a circuit consisting of a transistor and resistor that is placed in a shunt to the reference circuit. As the load current increases, the voltage across the resistor increases and the transistor is driven into saturation, thus limiting the current.

The MC1403D also features a tracking output, which is connected to a voltage divider that varies the output voltage in proportion to the input voltage. This feature is useful for ensuring a stable output voltage even as the input voltage varies.

Conclusion

The MC1403D voltage reference is an extremely useful component for power supply designs and devices requiring accurate voltage regulation and current limiting. With its proven reliability and wide range of applications, the MC1403D has become a common component in modern electronic designs.

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