ST EVALVIPER17L-7W handbook
Contents
1. ky EVALVIPER17L 7W Demonstration board on 7 W single output based on the VIPer17 Features m Current mode with user set drain current limitation Frequency jittering EMI regulation compliant Low stand by consumption High efficiency conversion Over load output short circuit protection Transformer saturation and secondary winding short circuit protection 2 OCP m Output over voltage protection optional m Brown out protection optional Description The new VIPer17 device integrates in the same package two components an advanced PWM controller built in BCD6 technology and an 800 V avalanche rugged vertical power MOSFET The device is suitable for off line power converter operating both with wide range input voltage 85 VAC 270 VAC up to 7 W or with single range input voltage 85 VAC 132 VAC or 175 VAC 265 VAC With European range input voltage 175 VAC 265 VAC the device can handle up to 10 W of output power The proposed solution has the advantage of using few external components compared to a discrete solution providing several switch mode power supply s protections and very low stand by consumption in no load condition VIPer17 device operates at fixed frequency that can be 115 kHz or 60 kHz according to the part number selected Frequency jittering is implemented and it helps to meet the standards regarding electromagnetic disturbance The several protections present on the device like2. W 30 1 R10 33 kQ resistor 1 4 W 31 2 R14 220 KQ resistor 1 4 W 32 1 R12 33 KQ resistor 1 4 W 33 1 R13 1 KQ resistor 1 4 W 34 1 T1 Switch mode power transformer ay 1 19 0003 35 1 T2 Common mode choke for line filter BU9 103R25B 36 1 U1 VIPER17 60 KHz DIP 7 VIPER 17 37 1 VR1 Voltage reference TL431 4 EVALVIPER17L 7W Revision history 2 Revision history Table 3 Document revision history Date Revision Changes 05 Jun 2008 1 Initial release 5 6 EVALVIPER17L 7W 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 If any part of this document refers to any third party products or services it shall not be deemed a license grant by ST for the use of such third part
3. of material 4 Table 2 BOM list Item Qty Reference Description Part value 1 1 BR1 600 V 1 A diodes bridge DFO6M 2 1 C1 100 nF X2 capacitor 100 nF x2 B32922 3 2 C2 C3 450V 10 uF electrolytic capacitor 450YXA10M12 5x20 4 1 C4 35 V 22 uF electrolytic capacitor i SAZROMZSVSXII 5 1 C5 Not mounted Not mounted 6 1 C6 25 V ceramic capacitor 1 8 nF 7 2 C7 25 V ceramic capacitor 33 nF 8 1 C8 Y1 2 2 nF capacitor Series 440L 9 1 c9 470 uF 25V electrolytic capacitor ARa L25 V40F 10 A C10 ates ee capacitor 50 V 4 7uF YK C11 25 V ceramic capacitor 330 nF 11 1 C12 10 nF 12 1 D1 Diode BAT46 13 1 D2 Diode 1N4148 14 1 D3 Diode STTH1L06 15 1 D4 Diode STPS2H100 16 1 D5 Transil P6KE250 17 1 F1 Fuse e V500 mi 18 2 J1 J2 Two screw connectors PK3502 19 1 J3 3 Pin jumper strip line Jumper 20 1 L1 10 uH 1 A inductor ELC09D100E 21 1 NTC1 10 Ohm NTC B57153S0100M000 22 1 OPTO1 Opto coupler PC817 23 1 R1 10 Ohm resistor 1 4 W resistor 24 2 R2 R4 1600 kQ 1 1 4 W resistor 1 precision 1 4 W 25 1 R3 68 kQ resistor 1 precision 1 4 W 26 1 R5 22 KQ 1 1 4 W resistor 1 precision 1 4 W 27 1 R6 1 KQ resistor 1 4 W 28 1 R8 15 KQ 1 1 4 W resistor 1 precision 1 4W 3 6 Bill of material EVALVIPER17L 7W 4 6 Table 2 BOM list continued Item Qty Reference Description Part value 29 1 R9 3 9 KQ 1 1 4 W resistor 1 Precision 1 4
4. overload output short circuit secondary winding short hard transformer saturation protection and June 2008 Rev 1 Data Brief EVALVIPER17L 7W brown out protections improve the reliability and safety of the design More over internal thermal shut down and an 800 V avalanche rugged power MOSFET improve the robustness of the system The present demonstration board is a standard one output isolated fly back converter that uses all the protections above mentioned If not necessary brown out protection and over voltage protection could be not used reducing the number of external comp furthermore 1 6 For further information contact your local STMicroelectronics sales office www st com Board parameter and circuit schematic EVALVIPER17L 7W 1 2 6 Board parameter and circuit schematic Table 1 Demonstration board parameters Parameter Symbol Value Input voltage range ViN 90Vams 265VRMs Output voltage Vout 12V Max output current lout 600mA Precision of output regulation AVOUT LF 5 High frequency output voltage ripple AVoUT_HE 50mV Figure 1 EVALVIPER17L 7W schematic P KE250 DS STTHILO6 3 2 0t STPS2H100 om 12V e00mA 2 NCI 100hm NTC 1000 v i R CONTROL on an 2 W c c2 0 y Q ad N C Che re NENN 3 1 cw BRIDGE SV tof con2 4 EVALVIPER17L 7W Bill of material Appendix A Bill
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ST EVALVIPER17L 7W handbook