STEVAL-ISA071V2 STMicroelectronics

STEVAL-ISA071V2 4 W non-insulated, wide input voltage range SMPS based on the VIPer16 Data brief Features Input: V : 85 - 264 V IN rms f: 45 - 66 Hz Output: 12 V 10% (referred to -5 V), 160 mA DC -5 V 4%, 400 mA DC Maximum output power: 4 W (range is up to 6 W for EU) Standby power: 35 mW at 230 V AC Short-circuit protected Insulation: non-insulated N connected to output GND EMI: in accordance with EN55022 class B RoHS compliant Description The STEVAL-ISA071V2 demonstration board is a non-insulated SMPS capable of delivering a 4 W output over a wide input voltage range and is designed for a mains application requiring -5 V and +7 V, referred to neutral. The basic concepts used in this design can also be applied for higher power outputs or different voltage ranges. The SMPS generates outputs of 5 V and 12 V, referred to the output marked -5 V. The 5 V output is dedicated to supplying an MCU. This configuration allows the use of the MCU to directly drive a Triac (referred to neutral). The 12 V output is used to supply additional circuits (relays, OA, etc.). April 2012 Doc ID 023089 Rev 1 1/4 For further information contact your local STMicroelectronics sales office. www.st.com 4 Q 9 X) 9 X) 9 X) 9 9 7 9 XW 2X 9 Q) 67 36 / *1 9 9 67 36 + / Schematic diagram STEVAL-ISA071V2 1 Schematic diagram Figure 1. Schematic diagram 9 S W N N X) X) () 6 DLQ U 0 1 67 / +7 &203 LSHU 9 N 9 N Q N 5 + 1 : 5 - V 2/4 Doc ID 023089 Rev 1 1 - & 1 P 5 & & 5 8 5 & & )% & /, - 5 5 5 & &