Denon AVR-550SD, Руководство по обслуживанию

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7
AVR-550SD
ICE2B265 (SMPS:IC2)
ICE2B0565 (SMPS:IC3)
Pin Assignmen
Block Diagram
1
6
7
8
4
3
2
5
VCC FB
Isense
Drain
SoftS
N.C
GND
Drain
The
rm
a
l
S
hut
d
o
wn
T
j
>1
4
0
°C
In
te
rn
a
l
Bia
s
V
o
lt
age
Re
fe
re
n
ce
Lea
di
ng
E
dge
B
lan
k
ing
200
ns
U
n
de
rv
ol
tag
e
Lo
ck
ou
t
Osc
ill
a
tor
D
u
ty
C
ycl
e
ma
x
Cu
rre
n
t-
Li
m
it
C
o
mp
ara
tor
x3
.65
So
ft
-S
ta
rt
C
om
par
at
o
r
Cu
rr
e
n
t
L
im
it
in
g
PW
M
O
P
Im
pro
ved
C
ur
re
nt
M
ode
Sof
t
St
a
rt
13
.5V
8.
5
V
6.
5V
C2 C1
16.5V
4.0V
R
FB
6.5V
Prot
ec
ti
on
U
ni
t
Po
w
e
r-
Do
wn
Re
s
e
t
P
o
we
r-
Up
Re
s
e
t
Powe
r
Ma
n
a
ge
m
e
nt
C
Soft-Start
21.
5-1
0
0
k
H
z
Cool
SE
T™-F
2
Sp
ik
e
Bla
n
kin
g
5s
PWM
Co
m
p
ar
ato
r
R SQ
Q
E
rro
r-
La
tc
h
C4
5.3V
C3
4.8V
R
Soft-Start
Ga
te
Dr
iv
e
r
G3
G2
G1
G4
T1
V
csth
P
rop
ag
ati
o
n
-D
e
la
y
Co
m
p
en
sa
ti
on
R S
Q Q
PW
M
-L
a
tc
h
0.
7
2
Clo
c
k
U
FB
f os
c
10
0kH
z
21.
5
k
H
z
St
a
ndby
U
ni
t
FB
R
Sense
0.
8
V
C5
0.3V
10
k
D1
5.6V
CoolM
O
S™
I
s
ens
e
GN
D
Sof
tS
VCC
Dr
ain
6.
5
V
5.
3
V
4.
8
V
4.
0
V