MP3 电路图

USB供电Power Solution 2
USB Connector
CN2 4 3 2 1 CN1 4 3 2 1 R5 22 GND USB_D+ USB_D1.5Vor5V IN 1.5Vor5V IN 3 VOLTS DETECTOR XC61CN2002MR GND IN OUT 1 R1 100K 1 3 1A FUSE1 D1 DIODE 1.5V_BATTERY

/CE=0,Vout=OFF; /CE=1,Vin=5V,Vout=1.5 V.
LDO XC6204B152MR GND IN /CE OUT 5 VDD_BAT RCE0 47K BJT LOW SAT TRANSISTORS 2 FLASH_RDY RE# CE0# VDDIO C22 0.1U CLE ALE WE# WP# VDDIO 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

R3

22

Vin>2V,Vout=1; Vin<2V,Vout=0.

2

3 Pch MOSFET XP152A12COMR

VDDD VDDIO + C6 C7 C14 C13 + 68U C15 C16 68U 1U C8 0.1U C9 0.01U VDDD C47 0.1U VDD_BAT VOL+ SW3 REW GPIO13 SW6 STOP GPIO14 USB_D+ USB_DR16 R17R18 10K 10K10K C17 10U VDDD AGND C44 0.1U VDDD AGND C43 0.1U 73 61 AVDD1 AVDD2 C18 0.1U 80 81 67 66 USBD+ USBDVAG VBG SW7 MODE/DEL SW8 DC_DC_BATT DC_DC_VCORE DC_DC