Termpwr (16P0287A) - Furuno FS-1575 Service Manual

2. TERMPWR (16P0287A)

DC(+)
DC(-)
L1
(LINE FIL)
L2, C22
(LINE FIL)
U11
(V Monitor)
RC9528
L4, C35
(LINE FIL)
VCC
Q1, CR2
(10V AVR
DC(-)
SW(+)
B(+)
Table 7.10.3 Operating Voltage of Power Supply Protection Circuit
Parameter
Low-voltage
protection for
input power
supply
Over-voltage
protection for
input power
supply
Reverse connection protection for
input power supply
Overcurrent
output
protection
CONFIDENTIAL (internal use only)
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It is strictly prohibited to reproduce the document in whole or in part without prior written permission of FURUNO.
T3, 4
U21
(SW Driver)
16P0224
U321, 331
(PWM Controll)
MB3759PF
T5, 6
U22
(SW Driver)
16P0224
U83, 84
R33
(Over Curr DET)
Fig. 7.10.2 TERMPWR Block Diagram
Set Value
Power supply
10V
starting voltage
Operating
8V
voltage
Hysteresis
1.7V
voltage
Operating
36V
voltage
Hysteresis
1V
voltage
Protected by a diode between input power
supplies.
1.5A
(Automatic resetting. Protection circuit
12V
activated at 1.18A. Overcurrent detected with
R114 and R115)
1.5A
5V (By overcurrent protection function of
auto-reset IC)
Automatic resetting
3.3V (Protection circuit activated at 14.2A.
Overcurrent detected with R33)
7-97
+12V 1A
REC U101: LT3598
(LED Driver)
CR53, 54
C53
U71: MP2106
(Step Down)
U82, 25
(I DET)
U52, 16
(V DET)
REC
+3.3V 1.49A
3.3V
CR44
C49
U53, 17
(V DET)
TERMPWR
(16P0287A)
7.10 NBDP Terminal
LED A, K
LED CTRL
LED PWM
5V 0.6A
LED A, K
J6
LED CTRL
LED PWM
5V
3.3V
J5
DC(-)
SW(+)
B(+)
J2
DC(+)
DC(-)
J1