STEVAL-ISA153V1

STEVAL-ISA153V1 12 V, 15 W (20 W peak) isolated flyback converter based on the VIPER38LE Data brief Description The STEVAL-ISA153V1 product evaluation board implements a 12 V/1.25 A, 15 W (20 W peak) isolated flyback wide-range mains developed for general-purpose applications. The core of the application is the VIPER38LE, the latest offline converter from the VIPerPlus family. The device is a high-voltage converter that smartly integrates an 800 V rugged power MOSFET with PWM current-mode control. The device features an adjustable extra power timer (EPT) that enables the IC to sustain overload conditions for a few seconds. Features • Universal input mains range: 90 – 265 VAC frequency: 50 - 60 Hz • Output voltage/current: 12 V/1.25 A (1.65 A peak) • Very compact size • Standby mains consumption: lower than 30 mW at 230 VAC • Minimum active mode efficiency: 81.55% • Minimum active mode at 10% load efficiency: 71.55% • EMI: in accordance with EN55022-Class-B • RoHS compliant May 2014 The main characteristics of the evaluation board are its small size and minimal BOM, high efficiency and low standby consumption. Extremely low consumption under no-load conditions is ensured thanks to burst mode operation which reduces the average switching frequency and minimizes all frequency-related losses. The VIPER38LE operates at a fixed 60 kHz frequency. Frequency jittering is implemented, which helps the application meet electromagnetic disturbance standards. The IC includes high-level protection features such as dual-level OCP, output overvoltage, short-circuit, and thermal shutdown with hysteresis. After removal of a fault condition, the IC is automatically restarted. DocID026381 Rev 1 For further information contact your local STMicroelectronics sales office. 1/4 www.st.com Schematic diagram 1 STEVAL-ISA153V1 Schematic diagram Figure 1. STEVAL-ISA153V1 circuit schematic 2/4 DocID026381 Rev 1 STEVAL-ISA153V1 2 Revision history Revision history Table 1. Document revision history Date Revision 16-May-2014 1 Changes Initial release. DocID026381 Rev 1 3/4 4 STEVAL-ISA153V1 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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