TPS61055DRCR

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TPS61055DRCR Application Field and Working Principle

The TPS61055DRCR is a 1-A constant current sink LED driver with a current boost converter. It is a Pulse Width Modulation (PWM) driven buck-boost current converter, which can drive a single low-power LED. It is a high-efficiency current boost converter that integrates a power switch, a power inductor and a Mode Controller with an internal 1-A current sink, making it ideal for low-power LED application.

The TPS61055DRCR, as a Pulse Width Modulation (PWM) current-driver, uses a buck-boost type power conversion topology. When the input voltage is higher than the output voltage, the switch is turned on and the input voltage is converted to the output voltage by buck switching the power switch. When the output voltage is higher than the input voltage, the switch is turned off, allowing the inductor to release the stored energy to the output, thus realizing a boost conversion state.

The TPS61055DRCR also features a constant current sink (1A) with very low current ripple, which can reduce the overall inrush current while driving the LED. The TPS61055DRCR also features an adjustable output current regulated setting to precisely sets the LED current under a variety of supply voltage and LED strings. All the features enable designers to design a power supply with high efficiency, low parts count and flexibility.

Applications

The TPS61055DRCR can be used in a variety of LED lighting applications, such as light bulb, street lights, flashlight and bicycle headlight, as well as automotive lighting. It also can be used in USB charging applications. The adjustable output current regulated setting makes it ideal for lighting application that needs wide range of output current regulated.

Advantages

• High efficiency
• Low parts count
• Flexible in output current regulated
• Integrated 1-A Constant current sink
• Low switching frequency

Conclusion

The TPS61055DRCR is a high-efficiency current boost converter with 1-A constant current sink that is ideal for low-power LED application. Its adjustable output current regulated setting make it possible to design power supplies with high efficiency, low parts count and flexibility. The TPS61055DRCR can be widely used in a variety of LED lighting applications, such as light bulb, street lights, flashlight, bicycle headlight and automotive lighting, and even USB charging.

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