Power Management; Power Management - Samsung YP-P3 Service Manual

7-2 Power Management
POWER
INN_BATT
Q304
KRA304V
1% OK
P3.2V
1% OK
Q300
KRC408V
GND
P5V
CHG_STATUS
D300
KDS121V
Q301
KRC857E
D301
KDS121V
1
RTC_INT
2
PWR_IN_DDCON
3
GND
POWER_OFF
Q
CLR PR D CK
ª CnI
x x
L H L clear
G ower off
x
H L x H
G ower on preset
L x
L x
H
H L
H L
H H
H H
H ª
H x
Q
/
V_DDCON
IC300
AAT1265IJS-5.0-T1
1 1
5V_SPK_CTL
2 2
3 3
4.7uH
4 4
L301
GND
Samsung Electronics
LED_DIMMING
LED+
LED-
(1 ª K Default 1000mA set ~Rª M )
Location Near CPU
BATT_LEV
DC LIM(mA) LIM2 LIM1
1000mA 0 0
475mA 1 0
95mA 0 1
suspend 1 1
V_DDCON
INN_BATT
IC302
7WH74
VCC
8 CK 1
6 7 D
PR 2
6 Q 3
CLR
5
5 Q GND 4
4
TP2
P3.2V
1% OK
Q302
KRC408V
1% OK
CPU_RST
GND
SPK_5V
8
8
7
7
6 6
60
L300
5 5
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INN_BATT P3.2V
L306
D303
RB551V-30 10uH
25V C312
10uF
DLIM2 RST1
28 8
PG2 BAT
27 9
LX2 SYS
26 10
MAX8819
PV2
25 DC
11
IC304
EN123
24 CEN 12
FB3 FB1
23 13
FB2 CISET
22 14
P3.2V
R324 10K
C314
4700nF
4.7uH
L305
400mA
200mA
P1.07V
TP4
P1.8V
0
TP3
R315
1% OK
1% OK
GND
Q303
1% ª¶
KRC857E
1% OK
1 6
2 5
3
4
1% OK
GND
P5V
V_DDCON
1% OK!
EXT_PWR
3.0V
1% OK!
1K 200ms delay
GND
CPU_RST
R333
CHARGE_STOP
1K
JTAG_RST
R334
GND
6.8K
KRC408V
R327 Q307
1% OK
CHRG_CTL
R1 R2
Charge(mA)
1% OK
300mA 3.3K X
300mA
440mA 3.3K 6.8K
P3.2V
GND
R310
0
1% OK!
1% OK!
GND
CORE_VOLT2
CORE_VOLT1
Schematic Diagram
TP2 / TP3 / TP4
TP3
TP2
TP4
7-3