DOWNLOAD Sharp 28JW-73H (serv.man12) Service Manual ↓ Size: 51.52 KB | Pages: 5 in PDF or view online for FREE

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

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

-:+
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($,&
-:+
7($,&
Note
1. Guaranteed by design.
Burst mode standby (pin 3)
V
th(burst)(on)
burst mode standby active threshold
voltage
at I
burst
= 6 mA
3.3
3.8
4.3
V
I
th(burst)(on)
burst mode standby active current
16
mA
I
th(burst)(off)
burst mode standby inactive current
6
mA
t
(burst-blank)
burst mode standby blanking time
25
30
35
µ
s
Valley switch (pin 8)
V/
t
valley
V/
t for valley recognition
85
+
85
V/
µ
s
t
valley-swon
delay from valley recognition to switch-on
150
(1)
ns
Current and short winding protection (pin 5)
V
sense(max)
maximum source voltage OCP
V/
t = 0.1 V/
µ
s
0.48
0.52
0.56
V
t
propagation
delay from detecting V
sense(max)
 to
switch-off
V/
t = 0.5 V/
µ
s
140
185
ns
V
swp
short winding protection voltage
0.83
0.88
0.96
V
t
leb
blanking time for current and short
winding protection
300
370
440
ns
I
ss
soft start current
V
sense
< 0.5 V
45
60
75
µ
A
Overvoltage protection (pin 4)
I
(OVP)(DEM)
OVP protection level at pin 4, set by the
demagnetization resistor R
DEM
; see
Section “OverVoltage Protection (OVP)”
54
60
66
µ
A
Overpower protection (pin 4)
I
(OPP)(DEM)
OPP current at pin 4, start of OPP
correction. Set by the demagnetization
resistor R
DEM
; see Section “OverPower
Protection (OPP)”
24
µ
A
I
(OPP50%)(DEM)
OPP current at pin 4 where maximum
source voltage is limited to 0.3 V
100
µ
A
Driver (pin 6)
I
source
source current capability of driver
V
CC
= 9.5 V; V
DRIVER
= 2 V
170
88
mA
I
sink
sink current capability of driver
V
CC
= 9.5 V; V
DRIVER
= 2 V
300
mA
V
CC
= 9.5 V;
V
DRIVER
= 9.5 V
400
700
mA
V
o(driver)(max)
maximum output voltage of the driver
V
CC
> 12 V
11.5
12
V
Temperature protection
T
prot(max)
maximum temperature threshold
130
140
150
°
C
T
prot(hyst)
hysteresis temperature
8
(1)
°
C
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX. UNIT
-:+
7($,&
Note
1. Guaranteed by design.
Burst mode standby (pin 3)
V
th(burst)(on)
burst mode standby active threshold
voltage
at I
burst
= 6 mA
3.3
3.8
4.3
V
I
th(burst)(on)
burst mode standby active current
16
mA
I
th(burst)(off)
burst mode standby inactive current
6
mA
t
(burst-blank)
burst mode standby blanking time
25
30
35
µ
s
Valley switch (pin 8)
V/
t
valley
V/
t for valley recognition
85
+
85
V/
µ
s
t
valley-swon
delay from valley recognition to switch-on
150
(1)
ns
Current and short winding protection (pin 5)
V
sense(max)
maximum source voltage OCP
V/
t = 0.1 V/
µ
s
0.48
0.52
0.56
V
t
propagation
delay from detecting V
sense(max)
 to
switch-off
V/
t = 0.5 V/
µ
s
140
185
ns
V
swp
short winding protection voltage
0.83
0.88
0.96
V
t
leb
blanking time for current and short
winding protection
300
370
440
ns
I
ss
soft start current
V
sense
< 0.5 V
45
60
75
µ
A
Overvoltage protection (pin 4)
I
(OVP)(DEM)
OVP protection level at pin 4, set by the
demagnetization resistor R
DEM
; see
Section “OverVoltage Protection (OVP)”
54
60
66
µ
A
Overpower protection (pin 4)
I
(OPP)(DEM)
OPP current at pin 4, start of OPP
correction. Set by the demagnetization
resistor R
DEM
; see Section “OverPower
Protection (OPP)”
24
µ
A
I
(OPP50%)(DEM)
OPP current at pin 4 where maximum
source voltage is limited to 0.3 V
100
µ
A
Driver (pin 6)
I
source
source current capability of driver
V
CC
= 9.5 V; V
DRIVER
= 2 V
170
88
mA
I
sink
sink current capability of driver
V
CC
= 9.5 V; V
DRIVER
= 2 V
300
mA
V
CC
= 9.5 V;
V
DRIVER
= 9.5 V
400
700
mA
V
o(driver)(max)
maximum output voltage of the driver
V
CC
> 12 V
11.5
12
V
Temperature protection
T
prot(max)
maximum temperature threshold
130
140
150
°
C
T
prot(hyst)
hysteresis temperature
8
(1)
°
C
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX. UNIT
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