TPS61194PWPRQ1

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Power management integrated circuits (PMICs) are an important component in electronic devices, providing chip-level power-management solutions. One of the important pieces of PMICs is LED drivers, which are devices dedicated to driving light-emitting diodes (LEDs). Among many LED drivers on the market, TPS61194PWPRQ1 stands out with its full-ripple-rejection and integrated Adjustable-Boost-Voltage (ABV) feature. This chip is designed to meet the requirements of 4W to 6W LED illumination applications.

Application Field

The TPS61194PWPRQ1 is a fixed-frequency constant-current LED driver. As a boost-type LED driver, it is ideal for LED lighting applications powered by a DC-DC converter with a wide input voltage range of 10V to 60V. It has integrated current limit and over voltage protection functions, while providing a full-ripple rejection feature. The TPS61194PWPRQ1 is available in a Surface-Mount packages and it can be used in a wide range of lighting applications, from 4W to 6W.

Features

As a boost-type LED driver, the TPS61194PWPRQ1 features:-

• Wide input voltage range, 10V to 60V;
• Integrated adjustable constant-current LED driver;
• Integrated adjustable voltage at the output node, provide adjustable boost voltage;
• Integrated 1A low-side Switch for LED dimming control;
• Integrated over voltage protection (OVP) function from 21V to 75V;
• Low quiescent current, 1.5mA;
• High-output ripple-rejection, up to 98.5%;
• Thermal shutdown protection and over-current protection for the switch;
• SME package.

Working Principle

The TPS61194PWPRQ1 is a boost-type LED driver. It works by converting a low-voltage input signal to a higher voltage to drive the LED. The voltage conversion is based on the electromagnetic induction principle, where the magnetic field is generated by an inductor. The chip contains a power switch and a control circuit which will turn off the power switch when the preset constant current value is reached. This constant current output is then input to the LED, driving it to illuminate.

The output can also be modified through the Adjustable-Boost-Voltage feature. This feature consists of an analog input pin, which adjusts the output voltage dependent on a maximum value set by the ADJUST_V pin. This allows for the user to set the voltage to match the output of the system.

Conclusion

The TPS61194PWPRQ1 is a powerful LED driver device with a wide input voltage range, from 10V to 60V, and a full-ripple rejection feature. It is suitable for a wide range of illumination applications, from 4W to 6W. The integrated adjustable-boost-voltage feature allows the user to fine-tune the output voltage, making it an ideal solution for LED lighting applications.

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