CIRCUIT DESCRIPTIONS
D60WLCD - 923-03486
3-9
094A - SERVICING
If the supplied voltage in the subsidiary power terminal
(Vcc) of this IC exceedes 22.2V (typ), the oscillation
operation is stopped by the over-voltage protect
circuit, the main switch is set to
off
and latch operation
begins.
* power voltage Vcc (ovp) for OVP operation = 22.2V
(typ)
3) PROTECT CIRCUIT AGAINST OVERHEAT (TSD)
When the internal temperature of the chip reaches
150°C (typ), oscillation operation stops, the main
switch is set to
off
and latch operation begins.
4) PROTECT CIRCUIT AGAINST OVER-CURRENT (OCP)
The main switch on the drain current is monitored. If
drain current over standard value is detected, the main
switch is switched to
off
immediately. This drain current
detection is performed whenever the main switch is
on. The standard voltage in the OCP terminal is 0.75V
(typ).
5) SOFT START FUNCTION (SS)
This IC has a Soft Start function which is timed, so an
external condensor for Soft Start is unnecessary. Soft
Start is performed by increasing standard voltage for
detecting over-current in a series of four steps and by
controlling current in the main switch. The time and
voltage level of each step is set internally.
Symbol
MIN
TYP
MAX
Vss(1)
0.16
- -
0.35
Vss(2)
0.35
- -
0.54
Vss(3)
0.51
- -
0.68
Vss(4)
0.63
- -
0.75
Содержание D60WLCD Series
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Страница 69: ...D60WLCD 923 03486 5 3 094A EXPLODED VIEWS D60WLCD Main PCB Layout...
Страница 70: ...D60WLCD 923 03486 5 4 094A EXPLODED VIEWS D60WLCD Power PCB Layout Power Ballast Interface...
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Страница 73: ...D60WLCD 923 03486 5 7 094A EXPLODED VIEWS D60WLCD Chroma PCB Layout...
Страница 74: ...D60WLCD 923 03486 5 8 094A EXPLODED VIEWS D60WLCD Tuner PCB Layout...
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