PT4126C Power Supplies - Board Mount

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DC DC Converters are an integral component of many power supplies today, and the PT4126C is no different. This device is a 3-terminal regulator with an on/off control input and an adjustable output voltage. It is designed to be an easy-to-use solution for a wide variety of power supply requirements.

The PT4126C is a synchronous, step-down, constant-current, switch-mode regulator. This means it has the capability to switch current from one source to another in a controlled manner. It utilizes two internal MOSFETs to control the current flowing in the output. The device has an input voltage range of 4.5V to 18V and an adjustable output voltage range of 0.75V to 3.6V.

The PT4126C is capable of handling both AC and DC input power. This is because it has a dual-mode switching mode that can be set for AC or DC input. Depending on the mode, the device has two different maximum output currents; when operating on AC input, the maximum output current is 1.2A while operating on DC input, it is 1A.

One of the key advantages of the PT4126C is its ability to achieve high efficiencies at input-to-output current ratings. As such, this device is an ideal choice for applications that require high conversion efficiency and low noise levels. Additional advantages include its low cost and a small, compact package size which further enhances its efficiency.

The PT4126C\'s performance is further boosted by its built-in current-mode control circuit which allows for fast transient response and a wide bandwidth that make it suitable for use in high-speed applications. In addition, the device has built-in thermal and short-circuit protection as well as an under-voltage lockout circuit that protects the output from low input voltages.

In terms of its application field, the PT4126C can be used in a wide range of applications such as portable electronics, cellular phone base stations, and other consumer and industrial applications. It can also be used for regulating the output voltage of other power supplies such as batteries and computer power supplies.

The working principle of the PT4126C is relatively simple. In essence, it is a constant-current-mode regulator that utilizes two FETs (Field-Effect Transistors) in a cross-coupled configuration. The two FETs are used to switch current from one source to another in order to keep the output voltage constant. The two FETs also work together to ensure that the output voltage is equal to the reference voltage.

Ultimately, the PT4126C is an efficient, cost-effective, 3-terminal regulator that can be used in a variety of power supplies. Its dual-mode switching mode allows it to be used for both AC and DC input power, and its current-mode control circuit offers excellent transient response and wide bandwidth. The device also offers built-in protection circuits, making it safe for use in many applications. Lastly, its small, compact size makes it highly efficient and cost effective.

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