ADC AD-75D II User Manual download pdf (Page 18)

POWER MANAGEMENT SYSTEM DEVICE

12.1 Li-ion Battery Charger Block Diagram

External

power

supply 1

VCHG11

FET1

VCHG12

VCHG13

VCHG21

FET3

VCHG22

VCHG23

VSYS1

VSYS2

VSYS3

VSYS4

FET2

VBAT1

VBAT2

VBAT3

VBAT4

FET1 Controller

FET3 Controller

(Soft start)

Charger

Controler

VCCVADP

VCHG1

connection

detection DET

[SDETADP]

VCCVBUS

VCHG2

Connection

detection DET

[SDETUSB]

LEDCTL

BOOTMASK

VCHG2ENB

VCHG2LIM

SUSPEND

VBATTH0

VBATTH1

Pin control

circuit

VTHM

THERMBAT

Thermistor

Monitor

Chip

temperature

detection

circuit

Li-ion

Battery

System

IMONI2

1kΩ

VCHGREGA

0.1uF

CHGGND

CHG

INTC

VINTD

CHG

logic

VCHGREGD

INTOUT

VCHGREGA

VCHG1 VCHG2

VCHGREGD

to ADC Block

Thermistor

External

power

supply 2

Interrupt control

circuit

VINTD

[CHGINT]

VCCVBAT

8MHz

Clock

VCHG2

VCHG1

VCHGREGA ADVDD

VCHGREGD

IOVDD

VCHGREGD

1.1MΩ

Reverse-

current

detectio1

VCHG1

Reverse-

current

detectio3

VCHG2

(*1,*2)

VCHGREGD

VCHG1

Overvoltage

detection DET

[VCHG1OV]

VCHG2

Overvoltage

detection DET

[VCHG2OV]

DDINA

Battery

Overvoltage

detection DET

[VBOV]

VCHG1 or VCHG2

Complete

detection DET

Battery

Connection

detection DET

[SDETBAT]

(*1)

System power

supply permission

DET

Note(*1): See “Appendix” for decoupring capacitors of VCHG11/12/13 and VCHG21/22/23, and capacitors of

VSYS1/2/3/4 and VBAT1/2/3/4/VCCVBAT.

Note(*2): The total of capacity connected with VSYS pin must become 50uF or less at the nominal capacity value.

VCHGREGD

1.0uF

PREICHG0

PREICHG1

VCHGREGD

1.1MΩ

VCHGREGD

1.1MΩ

VCHGREGD

1.1MΩ

VCHGREGD

1.1MΩ

information

VCHGREGD

VSYS

VCHGREGD

LEDCTL

logic

Fig 12-1 Li-ion Battery Charger Block Diagram

1 2 ... 13 14 15 16 17 18 19

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ADC AD-75D II User Manual Page 18

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