User`s guide

ManualsBrandsVivanco ManualsAdapterUNIVERSAL SWITCHMODE AC TO DC MAINS ADAPTERS WITH USB CHARGING FUNCTION

SMPS AC/DC Reference Design User’s Guide

DS70320B-page 82 © 2008 Microchip Technology Inc.

FIGURE A-8: BUCK CONVERTER STAGES SCHEMATIC

NEG_OUT

NEG_OUT

12V_OUT

5V_OUT

3.3V_OUT

NEG_OUT

3.3V_OUT_J3P5_IN

3.3V_OUT

CT_POS

CT_NEG

3.3V_OUT

12V_OUT

CT_NEG

15MQ040NPBF

D31

NEG_OUT

NEG_OUT

NEG_OUT

15MQ040NPBF

D20

NEG_OUT

NEG_OUT

15MQ040NPBF

D14

15MQ040NPBF

D41

3.3V_OUT

3.3V_BUCK#3_SHUNT_POS

3.3V_BUCK#1_FW_GATE

3.3V_BUCK#1_CONTROL_GATE

12V_OUT

3.3V_OUT

NEG_OUT

3.3V_BUCK#3_FW_GATE

NEG_OUT

5V_BUCK_FW_GATE

3.3V_BUCK#1_SHUNT_POS

NEG_OUT

3.3V_BUCK#3_SHUNT_POS

NEG_OUT

12V_OUT

3.3V_BUCK#2_SHUNT_POS

3.3V_BUCK#2_FW_GATE

3.3V_BUCK#2_CONTROL_GATE

3.3V_OUT_J3P7_IN

5V_BUCK_SHUNT_NEG_SENSE

5V_BUCK_SHUNT_POS_SENSE

NEG_OUT

NEG_OUT

3.3V_BUCK#3_CONTROL_GATE

3.3V_BUCK#1_SHUNT_POS

CT_POS

5V_BUCK_CONTROL_GATE

NEG_OUT

Coilcraft SER1360 1uH

L5

NEG_OUT

NEG_OUT

Coilcraft SER1360 1uH

L14

NEG_OUT

3.3V_OUT_J3P9_IN

3.3V_BUCK#2_SHUNT_POS

3.3V_OUT

47pF

7

8

3

1

L8

Coilcraft SER1360 1uH

L6

D46

BAT54S_SOT23

3.3V_BUCK#1_SHUNT_POS_HDR

3.3V_BUCK#2_SHUNT_POS_HDR

3.3V_BUCK#3_SHUNT_POS_HDR