PT5047LT

DC DC converters are devices that convert one DC voltage to another. The DC DC converter is used in applications where the load requires a specific voltage or current, but the available supply is different. The DC DC converter and its associated components typically consist of a power source, a power supply module, a switching device, and a control element. The PT5047LT is a DC DC converter intended for use in applications calling for a galvanic isolator and a high-precision control loop.

Features of the PT5047LT:

• High-efficiency: up to 94%
• Genius power isolation: insulation voltage up to 4kV
• High insulation performance:ESD immunity up to 4kV air/3kV contact
• Universal input voltage range: from 3.3V to 20V
• Output voltage adjustable range push-pull: from 6.0V to 42V
• Output voltage adjustable range source-load: from 0V to 40V
• Wide load range: up to 10A
• Power-on-reset: Short-circuit and overload protection

PT5047LT Application Field

The PT5047LT is a high performance, low power DC DC converter designed for applications including USB-C PD controllers, industrial power supplies, LED lighting, Ni-MH battery charging, Input-Output isolators, and motor driver. The PT5047LT is ideal for applications that require a wide input/output voltage range, high efficiency, and galvanic isolation.

PT5047LT Working Principle

The PT5047LT is a step-up/step-down DC-DC converter that is constructed with an N-channel MOSFET switch, an inductor, and two diodes. It has an input voltage range from 3.3V to 20V and an output voltage adjustable from 0V to 42V. During operation, the MOSFET switch is alternately on and off to convert the input voltage to an output voltage. The on/off switching frequency of the MOSFET switch is controlled by an external feedback circuit. When the feedback circuit senses the output voltage is below the set-point voltage, the MOSFET is switched on, allowing current to flow through the inductor. When the feedback loop senses the output voltage is above the set-point, the MOSFET is then switched off. This allows the inductor\'s energy to be stored in the output capacitor, and the output voltage is regulated at the desired level.

Conclusion

The PT5047LT is an innovative DC DC converter from Texas Instruments. It is intended for applications calling for a galvanic isolator and a high-precision control loop that require a wide input/output voltage range, a high efficiency and high insulation performance. With features like high efficiency and power-on-reset, the PT5047LT is an ideal choice for Industrial power supplies, LED lighting, Ni-MH battery charging, etc.