XPT5943

XP 2X3W X XPT5943 XP XW Ω B D BD z P XP B XP z B P BD XW D Ω ~ pop P · · USB 2.1/2.0 · ·GPS ·MP3/MP4/CD · · XPT5943 sales@xptek.cn R3-A 5 www.xptek.cn ; support@xptek.cn szxpt168 design@xptek.cn XPT5943ET ETSSOP24 XP 2X3W X PCS 50/ C1 100pF 3.7V 3.3uH Rfb1 70K Rvd1 5Ω Rfb2 10K Cvd1 10uF AGND2 SW2 SW1 ENDC 1 GND AGND2 2 VDD 3 ENDC Cout 22uF PGND SW 24 SW 23 PGND 22 Cv1 10uF Cv2 470uF PGND Rsw Csw 1.2Ω 1nF 4 FB PGND 21 PGND 10M/NC INR Rd2 10K MODE CinR RinR 0.39uF 15K AGND AGND Shutdown Control PGND Cs3 470uF 5 MODE VREF 20 6 INR XPT5943 INL 19 ETSSOP24 7 AGND AVDD 18 8 SHDN HP_IN 17 9 PVDDR PVDDL 16 0Ω RinL 15K 1uF CinL 0.39uF AGND INL AGND 10uF AGND Cs2 1uF 5Ω 10uF PGND Rd1 10K 100K 100K AGND To Control Pin on Headphone Jack Cs1 470uF Cs4 10uF B4 1nF 10 OUTR_P 11 PGNDR OUTL_P 15 PGNDL 14 B2 1nF 1nF PGND 12 OUTR_N B3 PGND OUTL_N 13 1nF B1 220uF 1K To HP-IN Circuit 1K Headphone Jack Control Pin XPT5943 220uF sales@xptek.cn R3-A 5 www.xptek.cn ; support@xptek.cn szxpt168 design@xptek.cn Rfb1,Rfb2 XP 2X3W X Rfb1,Rfb2 VFB 0.6V Vo = (Rfb1Rfb2 + 1) * 0.6 Rfb1,Rfb2 Vo 5V Vin Vo Ro r = ∆iL = Ro * (1 − D) 2 * D iL _ avg L* f f XPT5943 r L r=f D 1/3 CCM Lmin = Ro * (1 − D)2 2* f *D r: r≤2 Lmax ESR 1uH ~ 4.7uH, 5A XPT5943 r=0.3~0.5 5A PCB VDD VDD 470uF 10uF 22uF XPT5943 VDD 47uF ESR sales@xptek.cn R3-A 5 www.xptek.cn ; support@xp...