Power & Power Management

Overview

Description

The RAA223021 is a universal input AC/DC switching regulator with ultra-low standby power that  features a 700V integrated MOSFET capable of delivering up to 8W output power in buck mode, and up to 12W in flyback mode. It supports output voltage as low as 3.3V without additional LDO.

The 700V AC/DC regulator supports multiple topologies such as buck, primary-side-regulated flyback, and secondary-side-regulator flyback.

The RAA223021 combines constant off-time control for heavy load and Pulse Frequency Modulation (PFM) for light-load operation. Constant off-time controls switching frequency above the audible frequency of approximately 50kHz. PFM eliminates any potential audible noises while offering  superior light-load efficiency and ultra-low power consumption (< 20mW at no load). Efficiency is achieved up to 80%. The built-in frequency dithering further reduces the EMI noise spectrum.

The RAA223021 also features input brownout protection that prevents input circuitry from the overcurrent at low input voltage, and hiccup protections for output fault conditions such as short-circuit, overload, and open feedback.

The RAA223021 is available in an SOIC8-7 package.

Features

  • Ultra low standby power (< 20mW)
  • No audible noise
  • Low quiescent current (< 100μA)
  • Output voltage as low as 3.3V
  • Low EMI with frequency dithering
  • SOC8-7 package
  • Programmable PFM allows optimization of COUT for various standby power requirements
  • Protection features: Short-Circuit Protection (SCP), Overload Protection (OLP), Open Feedback Protection, and Over-Temperature Protection (OTP).

Applications

  • Home appliances
  • Home automation, IoT, and sensors
  • Metering and Industry control
  • Bias power

Documentation

Title Type Date
PDF920 KB
Datasheet
XLSX982 KB
Other

Design & Development

Boards & Kits

Boards & Kits

Models

Models

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WXSCH232 KB
Model - iSim
WXSCH223 KB
Model - iSim
WXSCH221 KB
Model - iSim
WXSCH220 KB
Model - iSim
WXSCH218 KB
Model - iSim

Support

Videos & Training

RAA2230xx Non-Isolated AC/DC 700V Buck Regulator Family

The innovative RAA2230xx family of 700V non-isolated AC/DC buck regulators delivers ultra-low-power consumption, excellent noise and EMI suppression, as well as reduced overall system cost for a wide range of applications, including home appliances, sensing systems, white goods, power meters and industrial controls.