ACT8700QLCHA-T

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The ACT8700QLCHA-T is a fully integrated power management IC designed for a variety of specialized applications. It is comprised of two synchronous step-down DC/DC converters, two high-side switch bridges, and two low-side switch bridges.

The two step-down converters are designed to operate in parallel for high current applications, and each has a unique feature set. The first features a synchronous buck converter with a wide input voltage range from 2.5V to 28V, programmable output current limit, adjustable frequency from 200 kHz to 2.5 MHz, and adjustable switching frequency from 400 kHz to 6 MHz. The second converter features a boost/buck circuit, programmable pulse-by-pulse over-current protection, adjustable frequency from 200kHz to 2.5 MHz, adjustable switching frequency from 400 kHz to 6 MHz, and open loop soft-start.

The two high-side switch bridges are designed to operate in parallel for applications requiring high current switching. Each bridge has a maximum peak current output of up to 5A, and is designed with a programmable on/off delay and ESD protection. The two low-side switch bridges are designed to operate in parallel for low current applications, each with a maximum peak current output up to 2A and are designed with low Rds(on) and low Qrr.

The ACT8700QLCHA-T is well-suited for applications such as motor control, power distribution, LED lighting, home appliances and consumer electronics. It is also ideal for applications requiring multiple step-down converters, such as automotive power systems, avionics, industrial controllers and safety systems.

The working principle of the ACT8700QLCHA-T power management IC is based on a control loop. The control loop receives input from the power/voltage monitor, compares it to the desired voltage/current levels and adjusts the output accordingly. This loop works by controlling the switching frequencies of the two step-down converters, the two high-side switch bridges and the two low-side switch bridges.

The two step-down converters are synchronously controlled, allowing for the output to be accurately regulated despite large fluctuations in the input. The high-side and low-side switch bridges are also driven synchronously, so they can be used to power multiple outputs simultaneously. Lastly, the on/off delay and ESD protection of the high-side switch bridges allow for reliable and efficient operation.

Overall, the ACT8700QLCHA-T is a highly efficient and reliable power management IC designed for specialized applications requiring multiple outputs and high current switching. Its advanced control and protection features make it an excellent choice for a variety of applications.

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