AS1345D-BWLT-17

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Introduction to AS1345D-BWLT-17

The AS1345D-BWLT-17 is a DC/DC converter product of the AS1345 type, which belongs to PMIC (power management integrated circuit). This switching regulator provides high efficiency and low noise output while consuming low bill-of-material cost and device-board space. It is a true buck converter using hysteretic loop control, so it has the advantage of fast line and load transient responses. Furthermore, the device operates from a 4.5V to 30V input voltage range, providing a pre-set output voltage depending on the application. With internal power switch and low quiescence current of 25P of switch off to reduce energy consumption

Application Field

The AS1345D-BWLT-17 is mainly used for industrial and automotive projects as it can supply very low-noise output and low bill-of-material cost in a device-board space-saving size. It is designed to reduce weight and minimize system size. It offers a wide input voltage range of 4.5 to 30V, making it suitable for a variety of wide input voltage supplies like battery, AC adapter, low voltage power grid, or a 24V industrial bus.

The AS1345D-BWLT-17 can also be applied for battery-powered devices. It provides a very economical solution especially for battery-powered applications such as industrial, automotive, and consumer equipment. It can reduce quiescent current from high to low by using the optional EN pin.

Working Principle

The AS1345D-BWLT-17 is a true buck device with built-in hysteretic loop control. It has a wide input voltage range of 4.5 to 30V and a maximum output current capability of 2.6A. The device features programmable slope compensation and programmable soft-start times. This allows the device to deliver fast transient response with low output noise.

The core of the device is the True Buck topology (TBT) combined with a hysteretic loop regulation. The True Buck Topology has been popularly used to meet the requirement of most DC/DC converters and offers maximum conversion efficiency. The unique hysteretic loop techniques provide fast transient response with low output noise for a wide input voltage. And the programmable output current limit is featured to ensure safe startup and operation of the converter.

The AS1345D-BWLT-17 adopts an internal power switch and multiple protection techniques, making it suitable for industrial and automotive applications. It provides fault signals for indicating undervoltage, overt current, overtemperature, and overvoltage alarm. In addition, overcurrent limit is also featured, allowing the power system to instantly turn off in case of an overcurrent event. Finally, the device provides a programmable soft-start function, enabling smooth startup of the power system.

Conclusion

The AS1345D-BWLT-17 is a low-cost, high-efficiency DC/DC converterproduct of the AS1345 type. It is a true buck device with integrated hysteretic loop control and features programmable slope compensation and programmable soft-start times. It is most suitable for industrial and automotive applications as it is extremely energy efficient, has very low output noise, and is cost effective.

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