Garmin MC34676B manual Evaluation Board Specification, Schematic Circuit of the Evaluation Board

Evaluation Board Specification

4 Evaluation Board Specification

The evaluation board is designed to work as a standalone charger, or as an embedded charger in a handheld system. Figure 3 shows its schematic circuit. The normal operation range of the evaluation board is:

For AC charger:

VAC_MIN = 4.3V, VAC_MAX = 6.8V IAC_MAX = 1200mA

For USB charger:

VUSB_MIN = 4.3V, VUSB_MAX = 5.85V IUSB_MAX = 400mA

TP1

AC

1

	2 1	J 1
			TP 15
		H D R _ 1X2
			AC
TP3
U SB
1
J3	2 1
H D R _ 1X2		J4	TP 17
		H D R _1X3	U SB

J 5		1	2	3
H D R _1X3
	3

2

22

1D 2

GR EEN

		D 1
	BAT	R ED
	1	1
	R 4		R 5
TP7	47 0 OH M		47 0 OH M
/P PR	1
			TP2 1
			/P PR
	J 8
	H D R _1X2		/ C H G
	2	1
	1	2	TP22
		J9
		H D R _1 X2
	R 6	R 7
TP1 0	1 00K	1 00K
VLo gic	1
TP1 1
/C H G	1
			B AT
	TP2 7	J1 3	2
			1
TP1 3	U SBE N	H D R _1 X2
U SBE N	1

C 1

1. 0U F

C 3

1. 0U F

U 1

MC 34 676 B

1	AC		BA TD ET	12
2	U SB		BAT	11
3				10
	PP R		U SBOU T
4				9
	C H G		I SET
5	U SB EN	D	GN D	8
6	I MIN	E -PA	IU SB	7

	1
	2
R 11	J 12
20 0K

H D R _1X2 R 10

28. 7K

	C 2	TP 16
	N C
		BA TD ET
			BAT
C 4				2	1	J 2
1. 0U F		TP 18				H D R _1X2
		VB AT

C 5	TP 19
1. 0U F
	U SB OU T	TP20
		I SET
	R 1	R 2	R 3
	26. 1K	1 3. 0K	6. 49
		1	1
		2	2
		J6	J
		H D R _ 1X2	H
		TP2 3

GN D

		TP2 4
		GN D
		TP2 5
R 8	R 9	GN D
13 .0 K	1 3. 3K
1	1
2	2	TP26
		I U SB
J10	J1 1
H D R _1 X2	H D R _ 1X2
		TP28
		IMI N

Figure 3. The Schematic Circuit of the Evaluation Board

Using the Dual 28V Input Voltage Charger with Linear Regulator, Rev. 1.0
Freescale Semiconductor	3