Sony NW-A806, NW-A808 service manual MAX8677AETG

NW-A805/A806/A808/NWZ-A815/A816/A818

IC901

MAX8677AETG

GND

/FLT

/UOK

/DOK

SYS

SYS

/CHG

25

24

23

22

21 20

19

/DONE

1

DC

2

DC

3

CURRENT-LIMITED

VOLTAGE REGULATOR

INPUT

LITHIUM BATTERY

SYSTEM

CHARGER

VOLTAGE

LOAD SWITCH

MONITOR

18

BAT

17

BAT

16

USB

/CEN

4

15

USB

INPUT LIMITER &

14

TSET

PEN1

5

CHARGER THERMAL

CURRENT

REGULATION

PEN2

6

SETTING

13

USUSS

7

8

9

10 11 12

PSET

VL

GND

CT

ISET

THM

IC903		MAX1557ETB
IN	1	BIAS	0.675V		OUTPUT	10	D1
			CURRENT-LIMIT		VOLTAGE
GND	2	CURRENT			SELECTOR
			COMPARATOR
		SENSE
		REFERENCE			SHORT-CIRCUIT
		1.25V		PWM	PROTECTION
		SLOPE	PWM	AUTO SKIP		9	INP
		COMPARATOR	COMPARATOR	CONTROL
					DRIVER
SS	3	ERROR	CLOCK			8	LX
			1MHZ
		AMPLIFIER
				SKIP-OVER	ZERO-CROSS	7	PGND
OUT	4			ENTER SKIP/
				SR OFF	DETECT
XSHDN	5					6	D2
			11
			PGND

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