RT6158HWSC

PMIC - Voltage Regulators - DC DC Switching Regulators

The RT6158HWSC is a comprehensive, cost-optimized synchronization converter with a synchronous rectifying buck PWM controller and a 5400 mV high-side MOSFET ideal diode, making it suitable for medium-to-high power designs. It can operate at up to four switching frequencies, allowing flexibility to designers in trade-offs between output voltage ripple and efficiency. An adjustable voltage soft-start feature helps to reduce input inrush current. The RT6158HWSC is also optimized for AC adapter applications, with built-in CC/CV loop, DC detection pin, and overvoltage protection (OVP). With additional features such as loop compensation and thermal shutdown protection, the RT6158HWSC provides all the features needed for optimal performance and system protection in AC adapter applications.

Application Field

The RT6158HWSC can be used as a synchronous rectifying buck PWM controller in a wide range of applications, from medium- to high-power switching power supplies. Its synchronization capability and adjustable switching frequency make it ideal for a wide range of AC adapter applications, such as for laptops, tablets, smart phones, and other consumer electronic products.

Working Principle

The RT6158HWSC operates in the buck topology, with an input voltage at up to 4V and an output voltage of up to 4.6V. It consists of a buck PWM controller and a 5400 mV high-side MOSFET ideal diode, as well as additional features such as an adjustable frequency, adjustable soft-start, loop compensation, and overvoltage protection (OVP).

The RT6158HWSC has two main modes of operation, synchronization mode and non-synchronization mode. In synchronization mode, the RT6158HWSC synchronizes its switching frequency with an external clock signal. This allows the converter to operate at the same frequency as the external clock signal, providing consistent performance over a wide range of load conditions. To ensure synchronization, the external clock frequency should be higher than the maximum switching frequency of the RT6158HWSC.

In non-synchronization mode, the RT6158HWSC operates at an internally-generated switching frequency, which can be adjusted from as low as 200kHz to as high as 2.2MHz. The output voltage can be adjusted through an external resistor divider. The output voltage range is 0.8V to 4.6V. In addition, the RT6158HWSC has an adjustable voltage soft-start feature, which can help to reduce input inrush current during initial startup.

The RT6158HWSC has built-in thermal protection, overcurrent protection, valley current limiting, and short-circuit protection to ensure optimal circuit protection and system reliability. It also provides a high-accuracy, low output voltage ripple current, making it suitable for high-current loads like laptops and consumer electronic products in demanding applications.

Conclusion

The RT6158HWSC is a comprehensive, cost-optimized synchronous rectifying buck PWM controller for medium-to-high power designs, such as AC adapter applications. It has a wide adjustable frequency range, adjustable voltage soft-start feature, loop compensation, and thermal shutdown protection to ensure optimal performance and system protection. In addition, the built-in CC/CV loop and DC detection pin make the RT6158HWSC the ideal choice for AC adapter applications.