STEVAL-ISA016V1

STEVAL-ISA016V1 Power supply for STB based on L6565 (EU-220V) Data Brief Features ■ Switch mode Quasi-Resonant Flyback Power Supply ■ Input: 185 to 265 Vac (European version) ■ Switching frequency: 50/60 Hz ■ Output1: 12V @ 500mA delivering 6W with ±10% of stability ■ Output2: 8V @ 40mA delivering 0.32W with ±15% of stability ■ Output3: 5V @ 1A delivering 5W with ±5% of stability ■ Output4: 3.3V @ 450mA delivering 1.485W with ±2% of stability ■ Output5: 1.23V @ 1A delivering 5W with ±5% of stability ■ Output6: 2.5V @ 0.7A delivering 1.75W with ±2% of stability STEVAL-ISA016V1 ST components General description This document describes a reference design of a 17W Switch Mode Power Supply dedicated to Set-Top Box applications. The board accepts European input voltages (90 to 265Vrms) and delivers up to 6W outputs. It is based on the L6565 quasi resonant SMPS controller, working in variable frequency mode. The Quasi-resonant operation and the high flexibility of the L6565 make it a very suitable device, able to satisfy all the requirements with only few external components. October 2006 Rev 1 For further information contact your local STMicroelectronics sales office. ■ STTH108 High Voltage Ultrafast Rectifier, 1A, 800V ■ SMBYW02-200 High Efficiency Fast Recovery Rectifier Diode, 2A, 200V ■ STPS5L40 Power Schottky Rectifier, 5A, 40V ■ STPS5L25B low drop power Schottky Rectifier, 3A, 40V ■ STPS340 Power Schottky Rectifier, 3A, 40V ■ L6565 Quasi Resonant SMPS controller ■ L5973D step down switching regulator up to 2.5A ■ LD29080DT25, 800mA fixed and adjustable output, very low dropout voltage regulator ■ STD3NK80Z N-channel zener protected SuperMESH Power MOSFETs, 800V, 3.2 Ohm, 2.5A 1/4 www.st.com 4 220Vac R1 16 Ohm - D1 S1ZB80 + C1 10µF 400V 1 3 I1A 4 2 C2 22µF 400V 2x47mH I1B 4 IC2A K1010 3B 3 R10 1.5K C5 10nF R9 1K R4 10K R3 1.5M R2 1.5M R6 270K R5 270K 1 2 3 4 L6565 INV VCC COMP GD VFF GND CS ZCD IC1 C3 47µF 25V 8 7 6 5 R7 150K D3 R11 10 ohm R13 47K BAV21W R8 1K C4 10nF 200V 4 5 TR1B MAR5146 R12 33 ohm UF108G D2 TR1A MAR5146 1 2 C7 1nF KX R14 2.2 ohm STD3NK80Z T1 C6 1nF KX TR1E MAR5146 TR1D MAR5146 TR1C MAR5146 6 8 8 7 7 9 C15 470µF 16V D7 STPS5L25B C10 470µF 16V D6 STPS5L40 C16 470µF 16V C11 470µF 16V C8 470µF 16V D4 SMBYW02-200 C20 220pF 3.3V C17 470µF 16V C12 470µF 16V 1 1 Vin IC4 VCC VREF SYNC COMP GND 2 IC3 Vout 3 FB OUT L5973D TS2431ILT I3 1µH R17 220 Ohm IC5 LD29080DT25 4.7K R21 I2 1µH IC2B K1010 3B C21 100nF 8 6 2 4 2 F1 1 3 2/4 INH GND R23 47K 5 1 2 C18 47nF D5 9.1V R15 560 ohm R22 2.2K I4 10µH R19 6.98K 1% C13 N.M. 2.5V C19 470µF 16V 3.3V C14 470µF 16V 5V C9 470µF 16V C22 470µF D8 STPS340U 16V R20 10K 1% R18 18.7K 1% T2 BC847 R16 56 ohm 2W 8V C24 10µF 25V 470µF 16V C23 1.23V 12V 3 10 9 8 7 6 5 4 12 11 2 1 2.5V/0.7A 1.23V/1.7A GND 3.3V/0.45A 5V/1A 8V/40mA 12V/0.5A Figure 1. 3 7 1 10 Ω 2W Board schematic STEVAL-ISA016V1 Board schematic Board schematic STEVAL-ISA016V1 2 Revision history Revision history Table 1. Revision history Date Revision 09-Oct-2006 1 Changes First issue 3/4 STEVAL-ISA016V1 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. No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted under this document. 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