RAA230122GSB#HA0

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PMIC - Voltage Regulators - DC DC Switching Regulators

The RAA230122GSB #HA0 is an integrated DC/DC Switched Mode Power Supply (SMPS) controller. It is designed to provide a range of output power levels for consumer and commercial applications requiring both high efficiency and low EMI. The device is designed to be integrated with a wide range of component values, allowing the creation of optimized switching voltage regulators catering to different applications.

Applications

The RAA230122GSB#HA0 can be applied in a range of applications, including notebooks, servers and adapters, battery-powered devices, automotive audio/video/entertainment systems, as well as general purpose power conversion. The device is designed to work with primary side controls and supports selectable input voltage ranges.

Working Principle

The RAA230122GSB#HA0 is a switched-mode power supply (SMPS) controller, utilizing Pulse Width Modulation (PWM) control techniques to provide efficiently regulated DC power output. All regulation and feedback control take place on the secondary side of the transformer, and as such, it does not require opto-isolators or other specialized isolation components.

The device utilizes a SenseFET technology, or voltage-mode control, using a Pulse-Frequency Modulation (PFM) circuit to control the duty-cycle of the switching elements. It is designed to maximize efficiency by operating in 100% duty-cycle full-on control during light loads and 120 kHz PFM during heavier loads.

The device is designed to heat-up microminiature coils and transformers such as those found in integrated power stages, and features a range of protections such as overvoltage, overcurrent, and overtemperature. It also includes a soft-on feature to reduce switch-on noise.

Conclusion

The RAA230122GSB#HA0 DC/DC SMPS offers a wide range of output power levels and is designed to provide both high efficiency and low EMI. It is ideal for applications such as notebooks, servers, and adapters, as well as general purpose power conversion. The device maximizes efficiency through its SenseFET technology and its 120 kHz PFM circuit. Its other features include a range of on-board protections and a soft-on feature.

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