Datasheet

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Evaluation Board Schematic

WARNING

The LM3448 evaluation board has exposed high voltage

components that present a shock hazard. Caution must be taken

when handling the evaluation board. Avoid touching the evaluation

board and removing any cables while the evaluation board is

operating. Isolating the evaluation board rather than the

oscilloscope is highly recommended.

WARNING

The ground connection on the evaluation board is NOT referenced

to earth ground. The oscilloscope should be powered via an

isolation transformer before an oscilloscope ground lead is

connected to the evaluation board.

WARNING

The LM3448 evaluation board should not be powered with an open

load. For proper operation, ensure that the desired number of LEDs

are connected at the output before applying power to the

evaluation board.

Table 3. Bill of Materials

Part ID Description Manufacturer Part Number

C1 CAP .047UF 400V METAL POLYPRO EPCOS Inc B32559C6473K000

C2 CAP FILM MKP .015UF 310VAC X2 Vishay/BC Components BFC233820153

C3 CAP ALUM 680UF 50V 20% RADIAL Nichicon UPW1H681MHD

C4, C15 CAP, CERM, 1uF, 35V, +/-10%, X7R, 0805 Taiyo Yuden GMK212B7105KG-T

C5, C9 CAP CER .15UF 250V X7R 1210 TDK C3225X7R2E154K

C6 CAP .10UF 305VAC EMI SUPPRESSION EPCOS B32921C3104M

C7 CAP, CERM, 0.1µF, 16V, +/-10%, X7R, 0805 Kemet C0805C104K4RACTU

C8 CAP CER 47UF 16V X5R 1210 MuRata GRM32ER61C476ME15L

C10 CAP CER .22UF 16V X7R 0603 MuRata GRM188R71C224KA01D

C11 Ceramic, X7R, 50V, 10% MuRata GRM188R71H222KA01D

C12 CAP CER 330PF 50V 5% C0G 0603 MuRata GRM1885C1H331JA01D

C13 CAP CER 2200PF 250VAC X1Y1 RAD TDK Corporation CD12-E2GA222MYNS

C14 CAP CERM .47UF 10% 25V X5R 0805 AVX 08053D474KAT2A

D1 DIODE TVS 120V 400W UNI 5% SMA Littlefuse SMAJ120A

D2 Diode, Switching-Bridge, 400V, 0.8A, MiniDIP Diodes Inc. HD04-T

D3 DIODE RECT GP 1A 1000V MINI-SMA Comchip Technology CGRM4007-G

D4 DIODE SCHOTTKY 100V 1A SMA ST Microelectronics STPS1H100A

D5 DIODE ZENER 47V 3W SMB ON Semi 1SMB5941BT3G

D6 DIODE ZENER 5.1V 200MW SOD-523F Fairchild Semiconductor MM5Z5V1

D7 DIODE ZENER 12V 200MW Fairchild Semiconductor MM5Z12V

D8 DIODE SWITCH 200V 200MW Diodes Inc BAV20WS-7-F

SNOA554C–October 2011–Revised May 2013 AN-2090 LM3448 -120VAC, 6W Isolated Flyback LED Driver

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