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IR3871M Datasheet(PDF) 8 Page - International Rectifier |
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IR3871M Datasheet(HTML) 8 Page - International Rectifier |
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8 / 21 page  8 IR3871MPBF TYPICAL APPLICATION CIRCUIT Demoboard Schematic: VOUT = 1.05V, Fs = 300kHz Demoboard Bill of Materials Figure 7. Typical Application Circuit for V OUT = 1.05V, Fs = 300kHz V OUT T P7 T P10 EN R9 0 V CC T P23 +V sws T P24 +V sws +V i ns R12 op en C26 op en T P8 V OUTS 5 2 T P21 -Vs ws T P25 -Vi n1s C27 op en T P12 V SWS 5 2 T P22 +V sws V IN C7 op en C8 op en C9 33 0uF C10 47 uF C11 op en C1 1u F R7 2.80K R8 2.55K C12 0.1uF C24 op en ISE T +3 .3V T P6 P GNDS T P14 +3 .3V IR3871 U1 IR3 871 NC 1 SS 6 P GOOD 3 GND1 4 FB 5 NC1 7 ISE T 2 P HA SE 12 C4 0.22u F V CC S W1 E N / FCCM T P4 EN T P17 P GND C20 0.1uF T P26 A GND C5 op en V SW C21 1u F T P11 P GOOD L1 1.5uH R6 op en C22 op en T P1 V INS R4 10 .5K R3 20 0K C13 op en C2 22 uF C16 op en + C3 68 uF T P2 V IN T P5 P GND C14 op en C17 op en C18 op en T P16 V CC R10 op en FB R5 10 K C15 op en C6 op en T P18 V OLT A GE S E NS E -Vo ut1 s T P9 +V out1s R1 op en FCCM P GOOD +V i n1s T P20 +V i n1s +3 .3V C25 1u F +V dd1 s -Vd d1s R13 op en +3 .3V T P15 -Vo ut1 s R14 op en T P19 FB R11 op en T P13 SS V SW +V dd2 s T P3 FCCM SS -Vd d2s R2 10 K C19 op en -Vi ns P GND V OUT C23 op en Quantity Reference Value Description Manufacturer Part-Number 1 C4 0.22uF CAP,CER,0.22uF,50V,10%,X7R,0603 Murata Electronics GRM188R71H224KA64D 3 C1, C21, C25 1uF CAP,CER,1.0uF,25V,X7R,0603 Murata Electronics GRM188R71E105KA12D 1 C2 22uF CAP,22uF,25V,CERAMIC,X5R,1210 Panasonic ECJ-4YB1E226M 1 C3 68uF CAP,68uF,25V,ELECT,FK,SMD Panasonic EEV-FK1E680P 1 C9 330uF POSCAP, 330uF, 2.5V, SMD Sanyo 2R5TPE330M9 1 C10 47uF CAP,CER,47uF,6.3V,X5R,0805 TDK C2012X5R0J476M 2 C12, C20 0.1uF CAP,CER,0.1uF,50V,10%,X7R,0603 TDK C1608X7R1H104K 1 L1 1.5uH INDUCTOR, 1.5uH, 11A, 6.7mOhm,SMD CYNTEC PCMB065T-1R5MS 2 R2, R5 10K RES,10.0K,OHM,1/10W,1%,0603,SMD Vishay/Dale CRCW060310K0FKEA 1 R9 0 RES,0.0,OHM,1/10W,1%,0603,SMD Vishay/Dale CRCW06030000Z0EAHP 1 R3 200K RES,200K,OHM,1/10W,1%,0603,SMD Vishay/Dale CRCW0603200KFKEA 1 R4 10.5K RES,10.5K,OHM,1/10W,1%,0603,SMD Vishay/Dale CRCW060310K5FKEA 1 R7 2.8K RES,2.8K,OHM,1/10W,1%,0603,SMD Vishay/Dale CRCW06032K80FKEA 1 R8 2.55K RES,2.55K,OHM,1/10W,1%,0603,SMD Vishay/Dale CRCW06032K55FKEA 1 SW1 SPST SWITCH, DIP, SPST, SMT C&K Components SD02H0SK 1 U1 IR3871 5mm x 6mm QFN IR IR3871MPBF |
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