Harman Kardon AVR 235 (serv.man12) Service Manual ▷ View online
R
×
5VL
14
OPERATION
FIG. 1 Block Diagram
Operation Diagram
Step 1. Output Voltage is equal to Power Source Voltage (V
DD
).
Step 2. When Input Voltage to Comparator reaches the state of Vref
≥
V
DD
·(Rb+Rc)/(Ra+Rb+Rc)at Point A (Detected Voltage –V
DET
), the output of Com-
parator is reserved, so that Output Voltage becomes GND.
Step 3. In the case of CMOS Output, Output Voltage becomes unstable when Supply Voltage (V
DD
) is smaller than Minimum Operating Voltage. In the
case of Nch Open Drain Output, a pulled-up voltage is output.
Step 4. Output Voltage becomes equal to GND.
Step 5. When Input Voltage to Comparator reaches the state of Vref
≤
V
DD
·(Rb)/(Ra+Rb) at Point B (Released Voltage +V
DET
), the output of Comparator is reserved,
so that Output Voltage becomes equal to Supply Voltage (V
DD
)
FIG. 2 Operation Diagram
Step
Step 1
Step 2
Step 3
Step 4
Step 5
Comparator(+)Pin
Input Voltage
I
II
II
II
I
Comparator Output
H
L
Indefinite
L
H
Tr. 1
OFF
ON
Indefinite
ON
OFF
Output Tr.
Pch
ON
OFF
Indefinite
OFF
ON
Nch
OFF
ON
Indefinite
ON
OFF
I.
Rb
+
Rc
Ra
+
Rb
+
Rc
·V
DD
II.
Rb
Ra
+
Rb
·V
DD
GND
OUT
V
DD
Ra
Rb
Rc
Tr.1
V
re
f
Pch
Nch
–
+
Detector Threshold Hysteresis
t
PLH
1
2
3
4
5
A
B
· In R
×
5VL
××
A, Nch Tr. drain is con-
nected to OUT pin.
· In R
×
5VL
××
C, Nch Tr. drain and
Pch Tr. drain are connected to
OUT pin.
Released Volage +V
DET
Supply Volage
Detected Volage –V
DET
(V
DD
)
Minimum Operating Volage
GND
Output Volage
(OUT)
GND
R
×
5VL
24
PACKAGE DIMENSIONS
(Unit: mm)
•
TO-92
•
SOT-89
•
SOT-23-5
5.2MAX.
4.2MAX.
2
.3
M
A
X
.
5
.2
M
A
X
.
1
2
.7
M
A
X
.
0.6MAX.
0.55MAX.
1.27
2.54
1
2
3
0
.7
0.5MAX.
4.5±0.1
0.4±0.1
0.4±0.1
1.5±0.1
1.6±0.2
1.5±0.1
±0.1
±0.1
±0.1
1.5±0.1
2
.5
±
0
.1
0
.4
M
IN
.
4
.2
5
M
A
X
.
0
.8
ø1.0
1
2
3
0.42
0.4 7
0.42
2.9
±
0.2
0.4
±
0.1
1.9
±
0.2
(0.95)
(0.95)
5
4
1
2
3
+
0
.2
–
0
.1
1
.6
+0.2
–0.1
–0.1
1.1
+0.1
–0.05
–0.05
0.15
2
.8
±
0
.3
0 to 0.1
0
.2
M
IN
.
0.8
±
0.1
R
×
5VL
25
TAPING SPECIFICATIONS
(Unit: mm)
•
TO-92
(Note) When taping is conducted, the pins of TO-92 are
subjected to a particular forming.
(Note) TZ type tape is not in the form of a reel, but is
packed in a zigzag state in a box.Therefore, the
tape can be used as either an RF type tape or an
RR type tape,depending upon the pulling out direc-
tion (B or F).
•
SOT-23-5
•
SOT-89
RF
RR
±1.0
0.3
12.7
12.7
ø 4.0±0.2
6
.0
±
0
.5
±
9
.0
±
0
.5
0
.5
M
A
X
.
1
8
.0
+
1
.0
–
0
.5
1
6
.0
±
0
.5
1
9
.0
±
0
.5
2
4
.7
M
A
X
.
1.45 MAX.
0.7±0.2
*
*
: Mark Side
When TZ type tape is
pulled out from the
direction B
pulled out from the
direction B
When TZ type tape is
pulled out from the
direction F
pulled out from the
direction F
User Direction of Feed
(Note)
User Direction of Feed.
T 1
ø
T 2
8.0±0.1
5.0
1.5
4.0±0.1
2.0±0.05
1
.5
±
0
.1
5
.6
5
±
0
.0
5
4
.7
1
2
±
0
.3
+0.1
–0
–0
2.5MAX.
0.3±0.1
T R
T L
2.0MAX.
0.3±0.1
4.0±0.1
2.0±0.05
4.0±0.1
3.3
3.2
8
.0
±
0
.3
1
.7
5
±
0
.1
3
.5
±
0
.0
5
1.5
+0.1
–0
–0
ø
User Direction of Feed.
5.2 MAX.
4.2 MAX.
2
.3
M
A
X
.
5
.2
M
A
X
.
1
2
.7
M
A
X
.
0.6 MAX.
0.55
1
2
3
0
.7
0.5 MAX.
MAX.
2.5 –0.1
+0.4
ELECTRONIC VOLUME CONTROL IC (IC40~44)
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