STEVAL-ISA114V1 5 V/0.8 W wide-range 30 kHz buck converter based on the VIPer06XS Data brief Description This document describes a 5 V- 0.15 A power supply set in buck topology with the VIPer06XS, a new off-line high voltage converter by STMicroelectronics, specifically developed for non-isolated SMPS. The features of the device include an 800 V avalanche rugged power section, PWM operation at 30 kHz with frequency jittering for lower EMI, limiting current with adjustable set point, on-board soft-start, safe auto-restart after a fault condition and low standby power consumption. Features The available protection includes a thermal shutdown with hysteresis, delayed overload protection and open loop failure protection. All protection is auto-restart mode. • Universal input mains range: – input voltage: 90 - 264 VAC – frequency: 45 - 65 Hz • Single-output voltage: – 5 V @ 0.16 A continuous operation • Fully protected against faults (overload, feedback disconnection and overheating) • EMI: according to EN55022-Class-B July 2013 DocID025045 Rev 1 For further information contact your local STMicroelectronics sales office. 1/8 www.st.com 8 Adapter features 1 STEVAL-ISA114V1 Adapter features The electrical specifications are given in Table 1, the schematic in Figure 1, and the bill of material in Table 2. Table 1. Electrical specifications Parameter Symbol Value VIN [80 VAC; 265 VAC] Output voltage VOUT 5V Max. output current IOUT 0.16 A Precision of output regulation ∆VOUT_LF ±5% High frequency output voltage ripple ∆VOUT_HF 50 mV Max. ambient operating temperature TAMB 60 ºC Input voltage range Table 2. Bill of material 2/8 Name Value Description C1 2.2 μF, 400 V Electrolytic capacitor Saxon C2 2.2 μF, 400 V Electrolytic capacitor Saxon C3 2.2 μF, 25 V Ceramic capacitor SMD: 0805 CFB Not mounted Ceramic capacitor SMD: 0805 Cf 100 nF, 50 V Ceramic capacitor SMD: 0805 Cc Not mounted Ceramic capacitor SMD: 0805 C7 22 nF, 25 V Ceramic capacitor SMD: 0805 Murata C8 100 nF, 50 V Ceramic capacitor SMD: 0805 Murata C9 100 μF, 25V Electrolytic capacitor D1 1N4007 High voltage rectifier DO-41 Fairchild D3 STTH1L06 High voltage ultra fast rectifier SMB (SOD87) ST D4 STTH1L06 High voltage ultra fast rectifier SMB (SOD87) ST Daux Not mounted Small signal diode IC VIPER06XS High voltage converter SSO-10 ST L1 1 mH Input filter inductor SMD Epcos L2 RFB0810-681 0.68 mH power inductor Coilcraft R1 22 ohm 1 W resistor Panasonic R3 1 kohm, 1% 1/4 W resistor DocID025045 Rev 1 Footprint Manufacturer Murata Murata Rubycon, ZL series SMD: 0805 Panasonic STEVAL-ISA114V1 Adapter features Table 2. Bill of material (continued) Name Value Description Footprint Manufacturer R4a 1.5 kohm, 1% 1/4 W resistor SMD: 0805 Panasonic R4b 22 kohm 1/4 W resistor SMD: 0805 R5a 15 kohm 1/4 W resistor SMD: 0805 R5b 0 ohm, 1% 1/4 W resistor SMD: 0805 R6 Not mounted 1/4 W resistor SMD: 0805 Rbl 10 kohm, 1% 1/4 W resistor SMD: 0805 Panasonic Panasonic Figure 1. Schematic AC IN R1 D1 L1 R5a R5b DRAIN DRAIN DRAIN DRAIN DRAIN R4a C8 VIPer06XS C1 D3 C2 GND VDD LIM FB COMP R4b CFB C3 Cf Cc R6 C7 D4 GND R3 L2 Vout C9 Rbl GND AM16734v1 DocID025045 Rev 1 3/8 Layout 2 STEVAL-ISA114V1 Layout Figure 2. Layout (top) AM16790v1 Figure 3. Layout (bottom) AM16789v1 4/8 DocID025045 Rev 1 STEVAL-ISA114V1 Layout Figure 4. Thermal measurement @ VIN = 80 VAC, full load (170 mA), 3.3 kohm bleeder Figure 5. Thermal measurement @ VIN = 115 VAC, full load (170 mA) 3.3 kohm bleeder Figure 6. Thermal measurement @ VIN = 230 VAC, full load (170 mA) 3.3 kohm bleeder DocID025045 Rev 1 5/8 Layout STEVAL-ISA114V1 Figure 7. Thermal measurement @ VIN = 265 VAC, full load (170 mA) 3.3 kohm bleeder 6/8 DocID025045 Rev 1 STEVAL-ISA114V1 3 Revision history Revision history Table 3. Document revision history Date Revision 24-Jul-2013 1 Changes Initial release. DocID025045 Rev 1 7/8 STEVAL-ISA114V1 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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