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Laptop Power Circuit Guide

The document summarizes the power on sequence for an Intel i3 or i5 processor on a Quanta UM7C motherboard. It involves the following key steps: 1. 19V power from the adapter is regulated by resistors PR34 and PR108 to provide power to the PQ3 transistor. 2. PQ3 powers on and provides a common ground, enabling the 3.3V LDO regulator to produce 3.3V power rails. 3. In AC mode, the ACAV_IN directly powers on the 3.3V rails, while in DC mode a button press enables the 3.3V rails via the ALW_ON signal.

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Nsb El-kathiri
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4K views3 pages

Laptop Power Circuit Guide

The document summarizes the power on sequence for an Intel i3 or i5 processor on a Quanta UM7C motherboard. It involves the following key steps: 1. 19V power from the adapter is regulated by resistors PR34 and PR108 to provide power to the PQ3 transistor. 2. PQ3 powers on and provides a common ground, enabling the 3.3V LDO regulator to produce 3.3V power rails. 3. In AC mode, the ACAV_IN directly powers on the 3.3V rails, while in DC mode a button press enables the 3.3V rails via the ALW_ON signal.

Uploaded by

Nsb El-kathiri
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Download as PDF, TXT or read online on Scribd
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Intel i3 i5

Power On Sequence

HM57_广达UM7C（DELL N3010）

Quanta UM7C
+DC_IN_SS 适配器19V经过PQ22
送至PQ26 D极
+PWR_SRC
PQ22 PQ26
+3.3V_ALW
VIN OUT2

PR104 PU7
240K RT8206BGQW
PR34
100K
LDO ON2
PR105
47K

PR108
10K PQ3导通后，从PQ26

+3.3V_EN2
D 内部二极管过来的19V
经过PR34和PR108分
PR39 G
PQ3 压得到电平，使Q26导
215K +3.3V_ALW
通产生公共点
S

PR40 R135 +5V_ALW


49.9K 100K

得到19V供电产生 D6
一路经过PR36、 LDO线性电压 SYS_PWR_SW#

3.3V_ALW_ON
THERM_STP#
PR40电阻分压送 +5V_ALW
至ACIN引脚产生 DC模式，按下开关，
R144
ACOK 开启3.3V_ALW_ON R143 100K
R141 100K
LDO
ACIN

DCIN

100K
EC发出ALW_ON，
PU1 PR18
10K POWER_SW_IN0# 维持3.3V_ALW_ON D
ISL88731A D5 G
ACAV_IN Q5
ACOK
D S
G
PR19 Q3 D
15.8K
LDO经PR18、 S G
PR19分压得到高 AC模式， ALW_ON Q4
电平送至PQ3 G极 ACAV_IN直接开启 S
3.3V_ALW_ON
H_VTTPWRGD

11
AM15
16 +3.3V_SUS 4
PM_DRAM_PWRGD
AL15
16 PCH

SYS_PWROK
CPU RTC 0

MEPWROK
H_PWRGOOD

PWRBTN#
RSMRST#
+3.3V_RUN

SLP_S3#
SLP_S5#
AN14

PWROK
17 +5V_RUN 10
+1.5V_RUN
RSTIN# CPU_PLTRST#

SUS_PWR_DN_ACK
5-1
6 10

SIO_SLP_S5#

SIO_SLP_S3#
+1.05V_VTT
4-1 5

PM_PWRBTN#_R
10-1

AC_PRESENT
PU4
13

RSMRST#
RT8204C 1.05V_VTT_PWRGD

ECPWROK
+VCC_CORE

15 +1.05V_PCH 10
PU8
7 8 RT8209A 1.05VPCH_PWRGD
10-1
69 112 80 81 73 124 82 9
RUN_ON
+0.75V_DDR_VTT 10
PU2 IMVP_VR_ON 12 123
PU3 +1.5V_SUS 4
ADP3212 95 RT8207 4-1
MNR2G
IMVP_PWRGD
119 EC 1.5V_DDR_PWRGD

3 SUS_ON

GFX_CORE_PWRGD
14 PQ17 +3.3V_SUS
14 4
VR_PWRGD_CLKEN#
10-2
125 AVCC 66 84 100 PU7 +5V_SUS 4
2 RT8206 +3.3V_ALW
SYS_PWR_SW#

+3.3V_EN2
Q2 1
THERM_STP#

14-1
0 ACAV_IN 10
+3.3V_ALW

PU5
CK_PWRGD_R +VCC_GFX_CORE
9 GFX_ON
PU6 GFX_+1.1V_EN PU9 +1.8V

CLK 1 11 HWPG 10-1

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