详解待机ic3728检修ltc3728

5 3 2 1

+VIN

C125

2A

C497

C522

C113

+VIN1

V+

R308 0

C520

+VL

+VIN

2A

C225

C533

D+VDD3

JOPEN12

A

C5060.1u_04

C5070.1u_04

C5090.1u_04

10u_12

10u_12

0.1u

0.01u

Q60A

C1430.1u

4

D10SCS551V

C

A

Z310124

U7

BOOST1

0.1u

23

VIN

INTVCC20

6

5

D11SCS551V

C169

10u_08

5

6

C1490.1u_04

10u_12

10u_12

C

C201 C200 C1990.1u_040.1u_040.1u_04

D

1

+VDD5

2

1

OPEN_4A R85 L29

SI4834

Z3103

Z310226

TG1

BOOST217

Z3114

C1830.1u

4

JOPEN7

3

4.7uH_BCIHP0735 R298 0

4A 10m_25

Z310425SW1 TG214

Z3115R325

0Z3116

Q64ASI4834

L314.7uH_BCIHP0735

2

1R01m22_25 OPEN_4A

8

7

Z310522

BG1

SW215

Z3117 4A 4A

C503 C504 C508 C500

C141

Z310630

7 3

8

SENSE1+

BG218

Z3118

*150u/4V_B150u/4V_B0.1u_04 0.01u_04 R303

60.4K_1%

C157

*100p

Q60BSI4834

2 Z310731

1

1000p

1

SENSE1-SENSE2+12

VOSENSE1SENSE2-11

Z3119Z3120

2

1

Q64B

R112 C196 C205 C202 C532 C531

GND

R30715K1%Z3108C5171000p

3PLLINVOSENSE29

ITH28

Z3121

Z3122

C1821000p

SI4834 105K_1%2200p 0.01u_040.1u_04150u/6.3V_D*150u/6.3V_D

C147 0.1u04

C505 0.1u04

C C167 0.1u04

R30018.2K_1%

C148

33p

GND_FELD

Z3109C172

R101 *0

33p

Z31105

7

Z311121

ITH13.3VOUT

EXTVCC

PGOOD27

NC10

NC16

NC29

C181 100p04Z3130R108 15K1%C519 33p

R111

19.6K_1% C

C161C156

0.1u04

0.1u_04

GND_FIELD +VDD5

Z31124FCB

NC32

RUN/SS128

RUN/SS213

Z3123Z3124

R2971M

R3111M

GND_FIELD

V+ GND_FIELD

GND_FIELD

+VL R306 *0

R103

+VL R102 0

R304

Z31132

6

PLLFLTR

SGND PGND19 C142 C521

FCB:0VforcontinuousmodeOpenforburstmode5Vforconstantmode

*0

GND_FIELD

PLLFLTR:0Vfor220KHZ

*0

5Vfor640KHZ

LTC3728LXCUH換無鉛料

R310 0

0.1u 0.1u

GND_FIELDGND_FIELD GND_FIELD

B

M1 M2 M3 M4 M5 M6

B

M7 M8

M-MARK1M-MARK1M-MARK1M-MARK1M-MARK1M-MARK1M-MARK1M-MARK1

H16 H19 H18 H10 H15 H20 H14 H12 H9 H8 H17 H21 H22 H1 H2 H3 H7 H11 H30

2 9

3 8 3 8

4 4

2

3 83 8

4

4 1 7

2

3

4 1 7

C67D67C158D158C158D158C158D158C158D158C67D67C67D67C296D111C237B128D107

5 65 65 65 65 65 6 5 65 65 6

MTH296D111A MTH296D111 MTH296D111 MTH296D111 C296D111N C296D111N C296D111N C296D185NC355CH512B296D111NC355CH512B296D111N

H32 H31 H28 H23 H25 H27 H26 H24 H13 H29 +VDD3[11,12,27]

A C237D107AC237D107AC237D107AC237D83AC367B158D158C237D91C367B158D158C367B158D158C237D91C237B128D107 M10 M11 M13 M9 M14 M12 +VDD5[11,27,28,29] A

M-MARK1M-MARK1M-MARK1M-MARK1M-MARK1M-MARK1

itle

+VIN[11,21,26,27,28,29,30]

+VIN1[27]

CLEVO

[31]+VDD3,+VDD5

CO. 藍天電腦

SizeA3

3326

Number

71-M55N0-002A

Rev

2.0A

5 3

PDFcreatedwithpdfFactoryProtrialversion

Date

2

TuesdayDecember202005 Sheet

1

31of 41

VOSENSE1 误差放大器输入端，通常作为输出电压设置端

PLLFLTR 锁相环输入端

PLLIN（空）外接同步信号输入端

FCB 模式控制端

ITH1 电流比较器输入端

SGND 地

3.3VOUT 3.3V基准电压输出端

ITH2 电流比较器输入端

VOSENSE12误差放大器输入端，通常作为输出电压设置端

NC 空

SENSE2- 电流检测正相输入端

SENSE2+ 电流检测负相输入端

RUN/SS2 软启动控制端

TG2 上下开关管驱动信号输出端

SW2 电感连接反馈输入端

NC 空

BOOST2 自举端

BG2 上下开关管驱动信号输出端

PGND 地

INTVCC 5V线性电压输