Garmin Battery Charger MC34676B User Manual

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Using the Dual 28V Input Voltage Charger with Linear Regulator, Rev. 1.0
Freescale Semiconductor 3
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:
V
AC_MIN
= 4.3V, V
AC_MAX
= 6.8V
I
AC_MAX
= 1200mA
For USB charger:
V
USB_MIN
= 4.3V, V
USB_MAX
= 5.85V
I
USB_MAX
= 400mA
Figure 3. The Schematic Circuit of the Evaluation Board
J10
HDR_1X2
1
2
J11
HDR_1X2
1
2
R9
13.3K
R8
13.0K
BAT
BAT
R11
200K
C5
1.0UF
R10
28.7K
J12
H DR_1X2
1
2
R3
6.4
9
R2
13.0K
R1
26.1K
TP26
IUSB
U1
MC34676B
AC
1
USB
2
PPR
3
CHG
4
USBEN
5
IMIN
6
IUSB
7
GND
8
ISET
9
USBOUT
10
BAT
11
BATDET
12
E-PAD
TP28
IMIN
C2
NC
TP1
AC
1
TP1 0
VLogic
1
TP1 3
USBEN
1
R5
470 OHM
R4
470 OHM
TP3
USB
1
J5
HD R_1X3
1
2
3
J4
HDR_1X3
1
2
3
R7
100K
R6
100K
D2
GREEN
21
D1
RED
21
TP2 5
GND
J13
HDR_1X2
1
2
TP 17
USB
TP22
/CHG
TP 15
AC
TP 16
BATDET
TP 18
VBAT
TP 19
USBOUT
TP2 4
GND
TP2 3
GND
TP20
ISET
TP2 7
USBEN
TP2 1
/PPR
TP1 1
/C HG
1
TP7
/PPR
1
J2
HDR_1X2
1
2
J1
HDR_1X2
1
2
J3
HDR_1X2
1
2
J
H
1
2
J6
HDR_1X2
1
2
J9
HDR_1X2
1
2
J8
HDR _1X2
1
2
C4
1.0UF
C3
1.0UF
C1
1.0UF
BAT

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