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Q71
Vdss=60V
Over_Voltage Protection (30V max)
C261
1.n
Q5
R108
100K
R109
100K
Vdet
R586
22K
R329
100K
_4.5V
2
When Vbat=3.5V
R1392
POS
82.5K
U60
1
FB
LM4041CIM3
R1442
NEG
127K
3
Bat_GND
Bat_GND
3.3_Alive
C239
3
In the case of open-collector
100.n
D81
R327
1.M
N.C.
U59
5
MAX917EUK
VCC
3
IN_P
1
OUT
4
IN_N_REF
VEE
2
Internal Ref.
C255
1.245V
10.n
Bat_GND
Vin
SD_VFloat
SD_Radio
R129
10K
5V_PF
SD_V_Normal
Bat_4.5V
R130
10K
BGND
VR46
30.
Vdet
3.3_VCC
U27
LP2901D
8
3
14
9
12
When Battery(4.5V) less than 3.9
R1467
1M
Bat_GND
PWM1
3.3_Alive
R585
301.K
N.C.
10uA
9V_PF
5.1
PS_Radio
Vin
VFloat
V_Radio
SD_VFloat
V_DO
SD_Radio
5V
PS_3.3_3V
Vin
5V_PF
KeepAlive
SD_V_Normal
V_Normal
Bat_4.5V
BGND
3.3_VCC
5.2
R337
100.K
Low_bat
It'll be "0"
Vdet
R331
392.K
L44
2.2u
C608
1.u
~9.3% of Vdet
C264
R320
1.n
40.2K
for 10V the accuracy is 150mV
VFloat
V_Radio
V_DO
3.3_VCC
V_Normal
3.3_Alive
C240
100.n
Bat_GND
Vdet
Vdet
R332
392.K
U27
LP2901D
10
3
13
~10.8% of Vdet
4
11
12
C265
Vdet
1.n
U27
LP2901D
4
3
2
2
5
12
R319
47.5K
5V
Filter
V_KeepAlive
N.C.
0.
R201
22u
L4
C241
C12
C13
10.u
10.u
100.n
22u
L5
N.C.
R200
SGND
0.
Vdet
U27
LP2901D
6
3
1
7
12
3.3_VCC
C230
C31
1u
100.n
R339
100.K
3.3_VCC
R340
100.K
When PWM between the levels
L1&L2=1
73D02962C89-O
SHEET 20 OF 23
L
L2
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