S-8355Q30MC-OWPT2U

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The S-8355Q30MC-OWPT2U is a DC/DC switching converter controller from the PMIC (Power Management IC) Voltage Regulators category. It is a highly integrated and programmable DC-DC step up controller suitable for applications ranging from consumer electronics to industrial applications.

Features

• On-board power MOSFET, LDO and DC-DC Boost functions
• High PWM frequency (up to 1MHz)
• Internal soft start
• High-efficiency DC/DC conversion
• Quasi-constant power management
• Programmable switching frequency
• Output current monitoring
• Internal over-temperature protection
• Low quiescent current consumption in shutdown mode

Uses and Working Principle

The S-8355Q30MC-OWPT2U is well suited for applications like portable electronic devices, mobile phones, tablet PCs, lightweight uninterruptible power supplies (UPSs), DC/DC converters, battery-powered equipment, charger systems and other consumer and industrial devices.

The device consists of an integrated MOSFET, pre-driver circuits and an error amplifier. It can be programmed to adjust the switching frequency and employs a quasi-constant power management system to maintain a fixed output power. It also has a built-in soft start feature for fast start-up times as well as an output current monitoring system for over current protection.

The DC-DC converter is based on the buck converter topology and works on the principle of switching with pulse-width modulation (PWM). The S-8355Q30MC-OWPT2U switches a power MOSFET at the chosen switching frequency, which varies the average current flowing into the inductor. This develops a voltage ramp up on the output side of the converter, which is then rectified and filtered to obtain the output voltage.

The S-8355Q30MC-OWPT2U also has the ability to enter power save mode when the load is below a certain level. In this mode, it reduces the switching frequency, reducing switching losses and improving the light load efficiency of the device. This feature also helps in meeting the strict standby power requirements of modern devices.

In addition, the controller features on-chip internal over-temperature protection. This protects the device from overheating, ensuring reliable and safe operation. It also features Under-Voltage Lockout (UVLO) functionality to protect the device from damage due to low voltage supplies.

Conclusion

The S-8355Q30MC-OWPT2U is a highly integrated and programmable DC-DC step up switch converter controller. Its versatility and feature set make it ideal for applications ranging from consumer electronics to industrial applications. With protection features like over-temperature monitor and UVLO, it ensures reliable and safe operation, making it an excellent choice for many applications.

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