Sony NWZA816P Service Manual - Page 29
Ic901, Max8677aetg, Ic903, Max1557etb
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NW-A805/A806/A808/NWZ-A815/A816/A818 IC901 MAX8677AETG GND /FLT /UOK /DOK SYS SYS /CHG /DONE 1 DC 2 DC 3 25 24 23 22 CURRENT-LIMITED VOLTAGE REGULATOR 21 20 19 /CEN 4 PEN1 5 PEN2 6 CURRENT SETTING 7 89 INPUT VOLTAGE MONITOR SYSTEM LOAD SWITCH LITHIUM BATTERY CHARGER INPUT LIMITER & CHARGER THERMAL REGULATION 18 BAT 17 BAT 16 USB 15 USB 14 TSET 13 USUSS 10 11 12 PSET VL GND CT ISET THM IC903 MAX1557ETB IN 1 GND 2 SS 3 OUT 4 XSHDN 5 BIAS REFERENCE 1.25V 0.675V CURRENT SENSE CURRENT-LIMIT COMPARATOR SLOPE COMPARATOR ERROR AMPLIFIER PWM COMPARATOR CLOCK 1MHZ 11 PWM AUTO SKIP CONTROL SKIP-OVER ENTER SKIP/ SR OFF OUTPUT VOLTAGE SELECTOR SHORT-CIRCUIT PROTECTION DRIVER ZERO-CROSS DETECT 10 D1 9 INP 8 LX 7 PGND 6 D2 PGND 29
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NW-A805/A806/A808/NWZ-A815/A816/A818
IC901
MAX8677AETG
IC903
MAX1557ETB
VOLTAGE REGULATOR
CURRENT-LIMITED
SETTING
CURRENT
CHARGER THERMAL
INPUT LIMITER &
REGULATION
VOLTAGE
INPUT
MONITOR
LOAD SWITCH
SYSTEM
CHARGER
LITHIUM BATTERY
2
DC
1
/DONE
3
DC
4
/CEN
5
PEN1
6
PEN2
7
PSET
8
VL
9
GND
10
CT
11
ISET
12
THM
24
/FLT
25
GND
23
/UOK
22
/DOK
21
SYS
20
SYS
19
/CHG
18
BAT
17
BAT
16
USB
15
USB
14
TSET
13
USUSS
COMPARATOR
CURRENT-LIMIT
COMPARATOR
PWM
COMPARATOR
SLOPE
SENSE
CURRENT
AMPLIFIER
ERROR
PROTECTION
SHORT-CIRCUIT
DETECT
ZERO-CROSS
1.25V
REFERENCE
VOLTAGE
OUTPUT
SELECTOR
AUTO SKIP
PWM
CONTROL
ENTER SKIP/
SKIP-OVER
SR OFF
BIAS
CLOCK
1MHZ
0.675V
10
D1
9
INP
8
LX
7
PGND
6
D2
1
IN
2
GND
3
SS
4
OUT
5
XSHDN
11
PGND
DRIVER