TPS61043DRBRG4

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Introduction

The TPS61043DRBRG4 is a single-stage synchronous step-up DC-DC converter that uses a high-side N-Channel MOSFET as the main switch. It features high efficiency of up to 95% for high input voltage up to 38V and a wide input voltage (4.5V-38V). The output voltage of the device is adjustable from 5V to 30V and the power ratings up to 45W. TPS61043DRBRG4 is designed for pointing light and interior lighting of electric vehicles and can deliver a higher current with a higher power to drive LEDs and small electronic systems.

Application Field

TPS61043DRBRG4 is designed for automotive lighting applications, including advanced headlight systems, vehicle mark light and tail light. This device can be used to drive either a single string of LEDs or a matrix of LEDs with a single die. It also works well as an adapter for other small electronic products. Furthermore, the TPS61043DRBRG4 can extend the battery life as it requires minimal input current to start-up.

Features and Benefits

• Up to 95% efficiency over a wide input voltage range.
• Wide input voltage range: 4.5V-38V.
• Output voltage adjustable from 5V to 30V.
• High power: up to 45W.
• Integrated soft-start function.
• Wide operating temperature range: -40 to +125 °C.
• Small package size: SOT-23-6.

Working Principle

The TPS61043DRBRG4 is based on a buck-boost architecture. It can regulate output voltage with ±5% accuracy over a wide input voltage range. The operation principle of the chip is very simple. When the input supply voltage is less than the output voltage, the device will drive the MOSFET with a large frequency step-up voltage, turning it on and pulling the load voltage up. During this time, the entire inductor current flows through the MOSFET and the output capacitor. When the load voltage becomes greater than the input supply voltage, the device will drive the MOSFET into P-channel mode and the voltage will be pulled down, while the entire inductor current will flow through the body-diode of the MOSFET.

Conclusion

TPS61043DRBRG4 is a highly-efficient, single-stage synchronous step-up DC-DC converter, featuring high efficiency up to 95%, wide input voltage range from 4.5V to 38V, adjustable output voltage from 5V to 30V and the power rating of up to 45W. This device can be used for automotive lighting applications, such as pointing light and interior lighting of electric vehicles, as well as for driving LEDs and other small electronic devices. It is also cost-effective and requires only minimal input current to start-up.

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