Read Sharp 28JW-74H (serv.man11) Service Manual online
32
28JW-74H
5
ELECTRICAL CHARACTERISTICS
(refer to Figure 1 on page 3)
Tamb = 25
°
C unless otherwise specified, Vcc =
±
12V, f
vert
=50Hz
Note: 1
Input voltage = 0, measured after the filter (e.g. accross the 470 nF filter capacitor)
Note: 2
Supply rejection of the positive or negative power supply. Vcc ripple =1Vpp, f=100Hz, measured on the sense
resistor.
resistor.
Note: 3
Power dissipated in the circuit in the case of the application from Figure 1 and the current in the deflection
yoke adjusted to 2.5App. The corresponding power dissipated in the vertical deflection yoke is 2.8W.
yoke adjusted to 2.5App. The corresponding power dissipated in the vertical deflection yoke is 2.8W.
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Units
+Vcc
Positive supply range
+10
+18
V
-Vcc
Negative supply range
-18
-10
V
∆
Vcc
Maximum recommended difference
between +Vcc and
between +Vcc and
±
4
V
Vcc
start
Low Vcc detection
±
6.5
V
Iq
Quiescent supply current
Input voltage = 0
14
mA
Iy
Maximum recommended vertical
yoke current
yoke current
±
1.25
A
I
13
, I
12
Amplifier Input bias current
-0.1
µ
A
V
OS
Output Offset voltage
Note 1
-50
+50
mV
SVR
Supply voltage rejection
Note 2
82
dB
Fly
thr
Flyback detection threshold
(positive slope)
(positive slope)
V(14)
1.5
V
Fly
thf
Flyback detection threshold
(negative slope)
(negative slope)
V(14)
0.5
V
Pd
Integrated circuit
Dissipated power
Dissipated power
Note 3
1.1
W
Fsw
Switching frequency
R
freq
= 10k
Ω
120
140
160
kHz
Fsw - op
Switching frequency operative range
100
200
kHz
R
freq
Frequency controller resistor range
Pin 10
7
10
14
k
Ω
Vcc
–
STV9380 (IC502)
Figure
1.
Test
Test
and
Application
Cir
cuit
Flyback
Flyback
Output
Modulator
+
_
drive
generator
detection
+VCC
+VCC power
CFLYBACK
CFLY+
100nF
VREG
IN+
IN -
1k
Ω
10k
Ω
EA out
-VCC power
-VCC
-VCC
BOOT
Cboot
470nF
10k
Ω
4.7nF
FREQ
FEEDCAP
SGND
Pins 1,2,3,18,19,20
OUT
0.5
Ω
Deflect.
Yoke*
CFLY-
+VCC
1mH
Input signal
1k
Ω
220nF
-VCC
100nF
100nF
1000
µ
F
1000
µ
F
STV9380
100
µ
F
14
11
9
17
560pF
150
Ω
200
Ω
15
16
8
TDA9380
5
6
7
4
13
12
150
Ω
10
Vref
-VCC
470pF
* Deflection yoke characteristics: R = 5.5
Ω
, L = 7mH
100nF
Sense
resistor
f
vert
= 50Hz
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