STEVAL-ISA020V1 3.5 W battery charger demonstration board based on the VIPer12AS-E and TSM101 Data Brief Features ■ Input voltage: – VIN: 88 - 264 Vac – frequency: 50-60 Hz ■ Output voltages: – VOUT = 0 to 7 V – IOUT = 0.5 A ■ Output signal: low battery check Description STEVAL-ISA020V1 The STEVAL-ISA020V1 battery charger demonstration board utilizes an AC-DC single output converter with approximately 3.5 W of power capability. The simple and cost-effective design is based on the Viper12AS-E low power off-line SMPS primary switcher for power conversion, and the TSM101 voltage and current controller for monitoring the battery charge level. July 2008 Rev 1 For further information contact your local STMicroelectronics sales office. 1/6 www.st.com 6 1 1 P2 N N L 250 250VAC VAC 0.5A D1 250 S25 + C1 7uF 4.7u 400V 400 KMG 330u 330uH 190mA 190 BC L1 C2 + 4.7u 7uF 400 400V KMG R3 100 100R C6 100pF 100p 500 500V C12 1nF 1n 500V 500 Y1 12AS AS VIPer12 FB VDD U1 3 4 4.7k C8 22n 22nF R21 U3B SFH617 617A-3 A-3 VDD EF16 AL = 120nH 120n ap = 0.22 22mm Gap T1A 3.1mH 160 turns t 18 CuL 0.18 V+ 2 1 8 5 6 7 + D5 PS160 160A STPS 60V 1A 60 T1D 3.0u 0uH 5 turns t 0.35 35 TEX-E EX-E C4 220u 220uF 35 35V LXY XY T1C 7uH 9.7u 9 turns t 35 TEX-E EX-E 0.35 LL4148 LL414 C3 10uF 10u 50V 50 KME R20 AM00644v1 LL4148 LL414 D7 C5 10u 10uF 50V 50 KME 22R 22 + + R8 220R 220 1 2 D2 3 R5 10 10R T1B 35u 35uH 17 tturns 0.18 18 CuL R9 1k C9 100nF 100n Vref Vr U2 R18 1R D3 LL414 LL4148 C10 100n 100nF R16 220R 220 R17 1R R15 220 220R R14 820R 820 6 U3A SFH617 617A-3 A-3 3 Vou out 8 7 6 5 Drain4 Drain3 Drain2 Drain1 Sou ource2 Sou ource1 4 3 - 4 P1 L 10R 10 3W - R1 ~ ~ 88... 88 ...264 264V~ V~ + 2/6 + 5 - + TSM101 101CD R10 1k Vref Vr 2 7 1 C11 100nF 100n R11 10 10k Vou out R13 1.8k R12 8.2k + 1 1 1 P4 GND P5 Cha harge C13 10uF 10u 50V 50 KME P3 0....6.9V/0.5A Figure 1. 8 4 1 2 1 Circuit schematic and PCB layout STEVAL-ISA020V1 Circuit schematic and PCB layout Schematic diagram STEVAL-ISA020V1 Circuit schematic and PCB layout Figure 2. PCB layout (solder side) Figure 3. Assembly (top) 3/6 Circuit schematic and PCB layout Figure 4. 4/6 Assembly (bottom) STEVAL-ISA020V1 STEVAL-ISA020V1 2 Revision history Revision history Table 1. Document revision history Date Revision 07-Jul-2008 1 Changes Initial release. 5/6 STEVAL-ISA020V1 Please Read Carefully: Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST’s terms and conditions of sale. Purchasers are solely responsible for the choice, selection and use of the ST products and services described herein, and ST assumes no liability whatsoever relating to the choice, selection or use of the ST products and services described herein. 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