STEVAL-ISA017V1

STEVAL-ISA017V1 Power supply for STB based on L6565 (US-110 V) Data Brief Features ■ Switch mode Quasi-Resonant Flyback Power Supply ■ Input: 88 to 138 Vac (US version) ■ Switching frequency: 50/60 Hz ■ Output1: 12 V @ 500 mA delivering 6 W with ± 10% of stability ■ Output2: 8 V @ 40 mA delivering 0.32 W with ± 15% of stability ■ Output3: 5 V @ 1 A delivering 5 W with ± 5% of stability ■ Output4: 3.3 V @ 450 mA delivering 1.485 W with ± 2% of stability ST components ■ Output5: 1.23 V @ 1 A delivering 5 W with ± 5% of stability ■ STTH108 High Voltage Ultrafast Rectifier, 1 A, 800 V ■ Output6: 2.5 V @ 0.7A delivering 1.75 W with ± 2% of stability ■ SMBYW02-200 High Efficiency Fast Recovery Rectifier Diode, 2 A, 200 V ■ STPS5L40 Power Schottky Rectifier, 5 A, 40 V ■ STPS5L25B low drop power Schottky Rectifier, 3 A, 40 V ■ STPS340 Power Schottky Rectifier, 3 A, 40 V ■ L6565 Quasi Resonant SMPS controller ■ L5973D step down switching regulator up to 2.5 A ■ LD29080DT25, 800 mA fixed and adjustable output, very low dropout voltage regulator ■ STD5NK50Z, N-channel zener protected SuperMESH Power MOSFETs, 500 V, 1.22 Ohm, 4.4 A STEVAL-ISA017V1 General description This document describes a reference design of a 17 W Switch Mode Power Supply dedicated to Set-Top Box applications. The board accepts US input voltages (90 to 265 Vrms) and delivers up to 6 W 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. March 2007 Rev 3 For further information contact your local STMicroelectronics sales office. 1/4 www.st.com 4 110Vac R1 16 Ohm - D1 S1ZB80 + C1 22µF 200V 1 3 I1A 4 2 C2 47µF 200V 2x47mH I1B 4 IC2A K1010 3B 3 R10 1.5K C5 10nF R9 1K R4 10K R3 1.5M R2 0 ohm R6 270K R5 0 ohm 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 MAR5145 R12 33 ohm UF108G D2 TR1A MAR5145 1 2 C7 1nF KX R14 1.1 ohm T1 STD5NM50 C6 1nF KX TR1E MAR5145 TR1D MAR5145 TR1C MAR5145 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 1 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 2/4 3 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. INH GND 1 3 7 F1 1A T Board schematic STEVAL-ISA017V1 Board schematic Board schematic STEVAL-ISA017V1 2 Revision history Revision history Table 1. Revision history Date Revision Changes 09-Oct-2006 1 First issue 06-Feb-2007 2 Typo mistake on page 1 09-Mar-2007 3 Minor text change 3/4 STEVAL-ISA017V1 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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