TPS61041DBVR Integrated Circuits (ICs)

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The TPS61041DBVR is a Linear Regulator (LDO) and a Step-Up Converter (DC/DC) designed for low output current applications, generally in the range of 0.5A to 1.5A. It is a reliable choice for LEDs, in particular for applications in the 3V to 12V range. The device is well suited for LED drivers that require a low quiescent current, high output voltage and high efficiency.

The TPS61041DBVR is optimized for efficiency and applied to LED drivers that require a low current & continuous mode (low-fi) operation. It combines an internally compensated low dropout (LDO) linear regulator and a high efficiency step up (DC/DC) converter in a compact single chip design. The device includes high linearity and low noise Operation, which results in stable operation and excellent regulation performance.

Field Application of TPS61041DBVR:

• General LED lighting
• Backlight LEDS
• Edge lighting LEDS
• Backlighting for LCD displays
• Automotive lighting

The TPS61041DBVR can be used in various LED driver applications, including general LED lighting, backlighting LEDs, edge lighting LEDs, backlighting LCD displays, and automotive lighting. In general LED lighting applications, the device can provide uniform output current over a wide voltage range, reducing the need for additional components and complexity. It is designed to ensure a constant output current to the LEDs, regardless of line or load regulation, and provides a high efficiency to maximize the light output.

The TPS61041DBVR also includes several features to improve system reliability, such as over-temperature protection, load disconnect, over voltage protection and soft start. Furthermore, the device includes a standby pin that can be used to put the device into a low-power state to further reduce system power consumption.

Working Principle:

The LDO regulator is the core element of the TPS61041DBVR and provides the required output voltage to power the LED. It is powered by an input voltage source and the output voltage can be adjusted by adjusting the sense resistor. The DC/DC converter is then connected to the output of the LDO and works by feeding the current needs of the LED from the LDO output. When the LED requires more current, the DC/DC converter boosts the current up to the specified level. The DC/DC converter can also be connected in parallel with the LDO depending on the application requirements.

The DC/DC converter uses a high frequency switching technique in order to achieve the highest efficiency and reduce input to output power loss. The power conversion is done by switching between a high- and low-side NMOSFET. The voltage stored on the main and feedback capacitors is monitored and accurately regulated to ensure that the output current is kept constant regardless of input voltage or load conditions.

The TPS61041DBVR features an adjustable frequency, allowing the switching frequency of the device to be optimized for the required application. This allows the use of a smaller inductor, resulting in reduced system cost and better efficiency. The device also features a synchronizable switching frequency and an integrated soft-start function.

In addition to its valuable features, the TPS61041DBVR is designed to operate over the entire industrial temperature range (-40°C to 85°C). It is available in the common 8-pin SOIC package and is lead-free.

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