STEVAL-ISA122V1 STMicroelectronics

STEVAL-ISA122V1 Wide input-range, single-output 5 V / 11 W power supply demonstration board based on the VIPer27 Data brief Features Wide input voltage range (V ): 90 to 265 V IN rms Nameplate output voltage (V ): 5 V out Max output current I : 2.2 A OUT Precision of output regulation: 5% High frequency output voltage ripple (V ): 50 mV out HF Max ambient operating temperature (T ): A 60 C RoHS compliant Description The STEVAL-ISA122V1 demonstration board meets the specifications of a wide range of auxiliary power supplies for applications including LCD or plasma TVs and desktop computers, where the power supply that converts the energy from the mains often includes two modules. One module is the main power supply which provides most of the power, and is off when the application is shut down or in standby mode. The other is the auxiliary power supply, which only provides energy to specific parts of the equipment such as the USB ports, remote receivers, or modems, but stays on when the application is in standby mode. It is optimized for very low standby consumption, which allows it to satisfy the most stringent energy-saving requirements. The VIPer27 has a switching frequency of 115 kHz, which helps to reduce the transformer size. February 2013 Doc ID 024124 Rev 1 1/5 For further information contact your local STMicroelectronics sales office. www.st.com 5Schematic diagram STEVAL-ISA122V1 1 Schematic diagram Figure 1. STEVAL-ISA122V1 circuit schematic 2/5 Doc ID 024124 Rev 1