STEVAL-ISA004V1 STMicroelectronics

STEVAL-ISA004V1 VIPer22A-E dual-output evaluation board with 90 to 264 V input AC and 10 W output Data Brief Features Switch-mode general-purpose power supply Input: 90 to 264 V 50/60 Hz AC Output: 12 V 0.42 A and 5 V 1 A Burst-mode operation in standby for Blue Angel operation Current mode control Switching frequency: 60 kHz STEVAL-ISA004V1 75% efficiency Auxiliary undervoltage lockout with hysteresis Output short-circuit protection Thermal shutdown protection Meets EN55022 Class B EMI specification Description This evaluation board is an offline, wide-range, VIPer22A-E dual-output power supply with a switching frequency of 60 kHz and is set up for secondary regulation with an optocoupler. One output delivers 5 V at 1 A and a second output delivers 12 V at 0.42 A, making for a total output power of 10 W. The evaluation board meets Blue Angel Norms, consuming less than 1 W total when working in standby mode. The board operates in burst mode when both the output loads are reduced to zero and the output voltages still remain regulated. November 2007 Rev 1 1/4 For further information contact your local STMicroelectronics sales office. www.st.com 4Board schematic STEVAL-ISA004V1 1 Board schematic Figure 1. Schematic 2/4 T1 D2 1N5821 L1 CVP32-002 L2 30mH 1 5 10uH C7 6 C5 FUSE 100uF . 0.5A 5X20mm 680uF 25V 1 R1 C3 R2 25V 250V 2 5 ohms 100pF 2k 5V GND F1 3 1W 1kV 0.5W L 4 3 4 2 D3 12V 0.42A . 3 8 J2 C2 R9 BYW100-200 C9 C12 CON4 22uF 220uF 15k 10uF J1 0 4 7 BR1 25V 400V 400V 0.5W C1 KBP210GDI 1 C8 0.047uF 2 12V Rtn W1 4.7nF D1 CON2 1N4148 85 to 264Vac Y1 cap 0 0 R7 8 Drain 7 4 DrainVdd 6 N Drain 5 9.1k Drain 2 X 30mH 1 Source 2 3 R4 SourceFb C4 68 22uF 25V R6 470 R8 U1 2.49k VIPer22A 1% U2 H11A817A C6 22nF U3 C11 TL431 0.01uF 50V ST 50V 0 R5 2.43k 1% All resistors are 1/4 W 5% unless specified. All capacitors are in uF and 50 V unless specified. 2 1 3 4 2 1