28JW-73H (serv.man12). IC's additional info part 3(p.31-35) — Sharp TV Service Manual (repair manual)

Model
28JW-73H (serv.man12)
Pages
5 Few pages! See other manuals at the bottom of the first or last page.
Size
51.52 KB
Type
PDF
Document
Service Manual
Brand
Device
TV / CTR / IC's additional info part 3(p.31-35)
File
28jw-73h-sm12.pdf
Date

View Sharp 28JW-73H (serv.man12) Service Manual online

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1
PIN FUNCTIONS
Pin
Number
Name
Function
1
-V
CC
Negative supply
2
-V
CC
Negative supply
3
-V
CC
Negative supply
4
OUT
PWM Output
5
CFLY+
Flyback capacitor
6
CFLY-
Flyback capacitor
7
BOOT
Bootstrap capacitor
8
VREG
Internal voltage regulator
9
FEEDCAP
Feed-back integrating capacitor
10
FREQ
Frequency setting resistor
11
SGND
Signal Ground
12
IN-
Error amplifier inverting input
13
IN+
Error amplifier non-inverting input
14
EA out
Error amplifier output
15
+V
CC
Positive supply
16
+V
CC
POW
Positive Power supply
17
-VccPOW
Negative Power supply
18
-V
CC
Negative supply
19
-V
CC
Negative supply
20
-V
CC
Negative supply
679,&
PIN CONNECTION
20
19
18
17
16
15
14
13
12
11
1
2
3
4
5
6
7
8
9
10
-V
CC
-V
CC
-V
CC
-V
CC
-V
CC
-V
CC
-V
CC
POW
+ V
CC
POW
+V
CC
EAout
IN+
IN-
SGND
OUT
CFLY +
CFLY -
BOOT
VREG
FEEDCAP
FREQ
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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.
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.
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
±
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
±
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)
V(14)
1.5
V
Fly
thf
Flyback detection threshold
(negative slope)
V(14)
0.5
V
Pd
Integrated circuit
Dissipated power
Note 3
1.1
W
Fsw
Switching frequency
R
freq
= 10k
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
Vcc
679,&
Figure
1.
Test
and
Application
Cir
cuit
Flyback
Flyback
Output
Modulator
+
_
drive
generator
detection
+VCC
+VCC power
CFLYBACK
CFLY+
100nF
VREG
IN+
IN -
1k
10k
EA out
-VCC power
-VCC
-VCC
BOOT
Cboot
470nF
10k
4.7nF
FREQ
FEEDCAP
SGND
Pins 1,2,3,18,19,20
OUT
0.5
Deflect.
Yoke*
CFLY-
+VCC
1mH
Input signal
1k
220nF
-VCC
100nF
100nF
1000
µ
F
1000
µ
F
STV9380
100
µ
F
14
11
9
17
560pF
150
200
15
16
8
TDA9380
5
6
7
4
13
12
150
10
Vref
-VCC
470pF
* Deflection yoke characteristics: R = 5.5
, L = 7mH
100nF
Sense
resistor
f
vert
= 50Hz
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7($,&
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PINNING
SYMBOL PIN
DESCRIPTION
V
CC
1
supply voltage
GND
2
ground
CTRL
3
control input
DEM
4
input from auxiliary winding for
demagnetization timing, OVP and OPP
I
sense
5
programmable current sense input
DRIVER
6
gate driver output
HVS
7
high voltage safety spacer, not
connected
DRAIN
8
drain of external MOS switch, input for
start-up current and valley sensing
handbook, halfpage
MGU231
TEA1507
1
2
3
4
VCC
GND
CTRL
DEM
DRAIN
HVS
DRIVER
Isense
8
7
6
5
Fig.3  Pin configuration.
h
SUPPLY
MANAGEMENT
internal
supply
UVLO
start
M-level
VCC
1
2
3
GND
S1
CTRL
FREQUENCY
CONTROL
VOLTAGE
CONTROLLED
OSCILLATOR
LOGIC
LOGIC
OVER-
VOLTAGE
PROTECTION
OVERPOWER
PROTECTION
short
winding
soft
start
S2
OVER-
TEMPERATURE
PROTECTION
S
Q
R
UVLO
Q
MAXIMUM
ON-TIME
PROTECTION
POWER-ON
RESET
1
VALLEY
TEA1507
100 mV
clamp
DRIVER
START-UP
CURRENT SOURCE
0.75 V
0.5 V
5
Isense
6
DRIVER
MGU230
4
DEM
8
DRAIN
7
HVS
n.c.
OCP
LEB
blank
Iss
2.5 V
burst
detect
-:+
CHARACTERISTICS
T
amb
= 25
°
C; V
CC
= 15 V; all voltages are measured with respect to ground (pin 2); currents are positive when flowing
into the IC; unless otherwise specified.
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX. UNIT
Start-up current source (pin 8)
I
i(DRAIN)
supply current drawn from drain pin
V
CC
= 0 V;  V
DRAIN
> 100 V
1.0
1.2
1.4
mA
with auxiliary supply;
V
DRAIN
> 100 V
100
300
µ
A
BV
DSS
breakdown voltage
650
V
M-level
mains-dependent operation-enabling level
60
100
V
V
CC
 management (pin 1)
V
CC(start)
start-up voltage on V
CC
10.3
11
11.7
V
V
CC(UVLO)
under voltage lock-out on V
CC
8.1
8.7
9.3
V
V
CC(hys)
hysteresis voltage on V
CC
V
CC(start)
V
CC(UVLO)
2.0
2.3
2.6
V
I
i(VCC)H
pin V
CC
 charging current
V
DRAIN
> 100 V; V
CC
< 3V
1.2
1
0.8
mA
I
i(VCC)L
pin V
CC
 charging current
V
DRAIN
> 100 V;
3 V < V
CC
< V
CC(UVLO)
1.2
0.75
0.45 mA
I
VCC(restart)
pin V
CC
 restart current
V
DRAIN
> 100 V;
V
CC(UVLO)
< V
CC
  < V
CC(start)
650
550
450
µ
A
I
CC(operate)
supply current under normal operation
no load on pin DRIVER
1.1
1.3
1.5
mA
Demagnetization management (pin 4)
V
DEM
demagnetization comparator threshold
voltage on pin DEM
50
100
150
mV
I
DEM
pin DEM current
V
DEM
= 50 mV
50
(1)
0
nA
V
clamp(DEM)(neg)
negative clamp voltage on pin DEM
at I
DEM
=
150
µ
A
0.5
0.25
0.05 V
V
clamp(DEM)(pos)
positive clamp voltage on pin DEM
at I
DEM
= 250
µ
A
0.5
0.7
0.9
V
t
suppr
suppression of transformer ringing at start
of secondary stroke
1.1
1.5
1.9
µ
s
Pulse width modulator
t
on(min)
minimum on-time
t
leb
ns
t
on(max)
maximum on-time
latched
40
50
60
µ
s
Oscillator
f
oscL
oscillator low frequency (fixed frequency)
V
CTRL
> 1.5 V
5
6.5
8
kHz
f
oscH
oscillator high frequency (fixed frequency) V
CTRL
< 1 V
145
175
205
kHz
V
vco(start)
peak voltage at pin I
sense
, where
frequency reduction starts
see Fig.6
75
mV
V
vco(max)
peak voltage at pin I
sense
, where the
frequency is equal to f
oscL
50
mV
Duty cycle control (pin 3)
V
CTRL(min)
min. voltage on CTRL (max. duty cycle)
1.0
V
V
CTRL(max)
max. voltage on CTRL (min. duty cycle)
1.5
V
7($,&
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  • Schematics, wiring and block diagrams.
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