LG Electronics 42LT640H-ZA EXTERNALPOWER OUT 5V/12V, LGE Internal Use Only, Real Time Clockrtc

EXTERNAL_POWER OUT 5V/12V

POWER_OUT

R1804

100K

Vout=(1+R1/R2)*0.765=5.03V

POWER_OUT

R1820

43

POWER_OUT

Switching

noise reducing [MPS recommend]

C1803

0 . 1 u F

50V

POWER_OUT

IC1802

R1810

+24V

c l o s e

t o p i n

MP4460DQ-LF-Z

EP_GND

22

POWER_OUT

SW_1

1

10

BST

D1800

SW_2

THERMAL

11

VIN_2

POWER_OUT

MBRA340T3G

2

9

POWER_OUT

C1810

C1812

EN

VIN_1

3

8

POWER_OUT

3 . 3 u F

0 . 1 u F

POWER_OUT

50V

50V

POWER_OUT

R1809

R1800

COMP

4

$0.21

7

FREQ

200K

+12V

C1802

1/8W

18K

150pF

FB

5

6

GND

1%

POWER_OUT

50V

POWER_OUT POWER_OUT

L1800

R1802

R1816

R1817

CB3216PA501E

150K

270K

10K

POWER_OUT

1/16W

1/16W

				IC1803
				MP5000DQ
POWER_OUT		GND	1	10
	C1813			POWER_OUT
	470pF	DV/DT
	50V		2	9
R1818
1K	ENABLE/FAULT		3	8
EXT12V_CTRL
POWER_OUT
		I-LIMIT	4	7
		NC	5	6
+12V
				11

SOURCE_5
			EXT_12V
SOURCE_4
		POWER_OUT
		L1804
SOURCE_3		CB3216PA501E
		C1817
SOURCE_2		0 . 1 u F
		50V
	POWER_OUT
SOURCE_1

POWER_OUT		1%	POWER_OUT
	POWER_OUT		1%

			L1802		C1806	POWER_OUT	POWER_OUT
			22UH			C1807	R1815
					22uF		20K
					25V	0 . 1 u F	1/16W
						50V	1%
							+12V
					POWER_OUT		close IC1800
		POWER_OUT			IC1800		POWER_OUT
		R1813	TPS54327DDAR [EP]GND					C1816
		10K
EXT5V_CTRL								10uF
								25V
			EN	1		VIN
POWER_OUT						8				EXT_5V
						POWER_OUT
	POWER_OUT				THERMAL 9
							C1805
R1811 R1812
			VFB			VBST	0 . 1 u F
56K	11K			2				POWER_OUT		POWER_OUT
						7
1%	1%						50V	L1801		L1803
C1814			VREG5			SW		3.6uH		BLM18PG121SN1D
				3					POWER_OUT
100pF						6
POWER_OUT							NR8040T3R6N		C1804	C1808
			SS			GND
				4					22uF	22uF
POWER_OUT						5
									16V	16V
	R1805									POWER_OUT
	12K
	1%	POWER_OUT
		C1800	C1801
		1uF
			3300pF
		10V
			50V
			POWER_OUT

VCC

EXTERNAL_POWER DETECTION

EXT_5V EXT_12V
R1822	R1821	POWER_OUT
200	2.4K	R1823
		100K
POWER_OUT	POWER_OUT
A1	A2
D1801		POWER_OUT
		IC1804
C		APX803D29			POWER_OUT
					R1806
	VCC	3	2	RESET	100
					EXT_PWR_DET

R1819	C1815	1
1.2K	0 . 1 u F	GND
1/16W	16V
	OPT
POWER_OUT

REAL TIME CLOCK(RTC)

IC1801

M41T83RMY6F

	NC_1
	1
	NF_1
	2
+3.5V_ST	NF_2
	3
	NC_2
	4
	RST
	5
	DU
	6
	SQW
	7
R1801	VBAT
1K
1	8
BA1800	VSS
BATTERY	9
2

NC_4	+3.5V_ST
18
NV_4
17		OPT
	C1809	C1811
NF_3	0 . 1 u F	22uF
16	16V	16V
VCC
15
IRQ2
14	+3.5V_ST
NC_3	OPT
13
	R1814
	10K
IRQ1/FT/OUT
12
SCL	R1807
	33
11		CLOCK_SCL
SDA	R1808
	33
10		CLOCK_SDA

THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION. FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.

EMEA INTERACTIVE

GP4_MSTAR	2011 . 08 . 21
EXT_POWER	1 9	2 0

Copyright © 2012 LG Electronics. Inc. All rights reserved.	LGE Internal Use Only
Only for training and service purposes