STEVAL-ISA119V1 1.5 W double output buck demonstration board based on the VIPER16LD Data brief Description The STEVAL-ISA119V1 is a dual output buck demonstration board using the VIPER16LD, a new off-line high voltage converter by STMicroelectronics which has been specifically developed for non-isolated SMPS. Output regulation is easily achieved through a voltage divider to the output voltage. The VIPER16LD can work with or without an external supply. In the former case, very low standby consumption is possible(< 50 mW at 265 Vac) while in the latter case, the cost and complication of the IC supply network may be reduced. Features • Input voltage range (VIN): 90 VRMS to 265 VRMS • Output voltage 1 (VOUT1) = 12 V • Max output current 1: (IOUT1) = 0.1 A • Output voltage 2: (VOUT2) = 5 V (through LDO) • Max output current 2: (IOUT2)= 0.05 A • Precision of output regulation ΔVOUT_LF = ±5% The other features of the device include an 800 V avalanche-rugged power section, PWM operation at 60 kHz with frequency jittering for lower EMI, limiting current with adjustable set point, on-board soft-start and safe auto-restart after a fault condition. The available protection features are thermal shutdown with hysteresis and delayed overload protection. • High frequency output voltage ripple ΔVOUT_HF = 50 mV • Max ambient operating temperature TA = 60 °C June 2013 DocID024486 Rev 1 For further information contact your local STMicroelectronics sales office. 1/4 www.st.com 4 Schematic diagram 1 STEVAL-ISA119V1 Schematic diagram Figure 1. STEVAL-ISA119V1 circuit schematic & 5 5 $&,1 5 ' ' / &LQ & & 1& &203 1& )% 1& /,0 1& 9' ' '5$,1 1$ '5$,1 1& '5$,1 *1 ' '5$,1 *1 ' & 5$ 5% 5 & & 5 & & 9RXW ' / ' 2/4 ' - 9,3H U/ ' DocID024486 Rev 1 9RXW & ' ,& & STEVAL-ISA119V1 2 Revision history Revision history Table 1. Document revision history Date Revision 18-Jun-2013 1 Changes Initial release. DocID024486 Rev 1 3/4 STEVAL-ISA119V1 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. 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