EVALVIPER17L-7W

EVALVIPER17L-7W Demonstration board on 7 W single output based on the VIPer17 Data Brief Features ■ 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 (2nd OCP) ) s ( ct ■ Output over-voltage protection (optional) ■ Brown out protection (optional) Description u d o r P e t e l o EVALVIPER17L-7W ) (s s b O 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. t c u d o r P e 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. t e l o s b O 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 like: overload, output short circuit, secondary winding short, hard transformer saturation protection and June 2008 Rev 1 For further information contact your local STMicroelectronics sales office. 1/6 www.st.com 6 Board parameter and circuit schematic 1 EVALVIPER17L-7W Board parameter and circuit schematic Table 1. Demonstration board parameters Parameter Symbol Value Input voltage range VIN 90VRMS – 265VRMS Output voltage VOUT 12V Max output current IOUT 600mA Precision of output regulation ∆VOUT_LF ±5% High frequency output voltage ripple ∆VOUT_HF 50mV Figure 1. ) s ( ct EVALVIPER17L-7W schematic u d o r P e t e l o ) (s t c u d o r P e t e l o s b O 2/6 s b O EVALVIPER17L-7W Appendix A Bill of material Table 2. Bill of material BOM list Item Qty. Reference 1 1 BR1 2 1 C1 3 2 4 DF06M 100 nF X2 capacitor 100 nF x2 B32922 C2, C3 450V 10 µF electrolytic capacitor 450YXA10M12.5x20 1 C4 35 V 22 µF electrolytic capacitor NRSA220M35V5x11 TR 5 1 C5 Not mounted Not mounted 6 1 C6 25 V ceramic capacitor 1.8 nF 7 2 C7 25 V ceramic capacitor 8 1 C8 Y1 2.2 nF capacitor 9 1 C9 470 µF 25V electrolytic capacitor Serie ZL 25 V 470 µF 10X16 C10 25 V 47 µF electrolytic capacitor rubycon ZLG 50 V 4.7µF YK C11 25 V ceramic capacitor 330 nF 1 )- e t e ol u d o 33 nF Pr s b O ) s ( ct Series 440L 11 1 C12 12 1 D1 Diode BAT46 13 1 D2 Diode 1N4148 D3 Diode STTH1L06 1 D4 Diode STPS2H100 1 D5 Transil P6KE250 17 1 F1 Fuse TR5 250 V 500 mA (fuse) 18 2 J1,J2 Two screw connectors PK3502 19 1 J3 3 Pin jumper (strip line) Jumper 20 1 L1 10 µH 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 kΩ 1% 1/4 W resistor 1% precision 1/4 W 25 1 R3 68 kΩ resistor 1% precision 1/4 W 26 1 R5 22 kΩ 1% 1/4 W resistor 1% precision 1/4 W 27 1 R6 1 kΩ resistor 1/4 W 28 1 R8 15 kΩ 1% 1/4 W resistor 1% precision 1/4W 1 ro 15 P e 16 s ( t c du 14 s b O Part/value 600 V 1 A diodes bridge 10 t e l o Description 10 nF 3/6 Bill of material EVALVIPER17L-7W Table 2. BOM list (continued) Item Qty. Reference Description Part/value 29 1 R9 3.9 kΩ 1% 1/4 W resistor 1% Precision 1/4 W 30 1 R10 33 kΩ resistor 1/4 W 31 2 R14 220 kΩ resistor 1/4 W 32 1 R12 33 kΩ resistor 1/4 W 33 1 R13 1 kΩ resistor 1/4 W 34 1 T1 Switch mode power transformer Code: 1715.0009 REV1 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 r P e u d o t e l o ) (s t c u d o r P e t e l o s b O 4/6 s b O ) s ( ct EVALVIPER17L-7W 2 Revision history Revision history Table 3. Document revision history Date Revision 05-Jun-2008 1 Changes Initial release. ) s ( ct u d o r P e t e l o ) (s s b O t c u d o r P e t e l o s b O 5/6 EVALVIPER17L-7W ) s ( ct Please Read Carefully: u d o Information in this document is provided solely in connection with ST products. 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