參數(shù)資料
型號(hào)： TB1254N
元件分類： 消費(fèi)家電
英文描述： SPECIALTY CONSUMER CIRCUIT, PDIP56
封裝： 0.600 INCH, PLASTIC, SDIP-56
文件頁數(shù)： 43/58頁
文件大?。?/td> 526K
代理商： TB1254N
Ver3.7
00/01/28 48
Note
Items/Symbols
Bus conditoins
Measurement methods
D2
H-OUT Start Voltage
/ VHON
All:Preset
(1)Let Pin1/14/37/42 be open.
(2)Increasing Pin31 voltage, measure the voltage at which H
OUT pulse appears at Pin32, that is "VHON".
D3
H-OUT Pulse Duty
/ WHOUT
All:Preset
(1)Measure tHOUT1 & tHOUT2 at Pin32.
(2)Calculate;"WHOUT"=tHOUT1/(tHOUT1+tHOUT2)*100
D4
H-OUT Freq. on AFC
Stop Mode
/ FHAFCOFF
AFC
Gain:11
(OFF)
Others:Preset
(1)Input a 50Hz composite sync signal into Pin38.
(2)Measure the H OUT frequency at Pin32, that is "FHAFCOFF".
D5
Horizontal
Free-run
Frequency
/ FH50FR
/ FH60FR
V-Freq:001/010
Others:Preset
For V-Freq 001/010, measure the H OUT frequency at Pin32, that
is "FH50FR" / "FH60FR".
D6
Horizontal
Freq.
Variable Range
/ FHMAX
/ FHMIN
All:Preset
(1)Connect Pin29 to Vcc via a 10k
and measure the H OUT
frequency at Pin32, that is "FHMAX".
(2)Connect Pin29 to GND via a 68k
and measure the H OUT
frequency at Pin32, that is "FHMIN".
D7
Horizontal
Freq.
Control Sensitivity
/
HAFC
All:Preset
(1)Measure the Pin29 voltage at which H OUT frequency is
15.734kHz, that is VH15734.
(2)Measure the H OUT frequency when Pin29 voltage is VH15734 +
50mV /VH15734 - 50mV, that is FHHIGH / FHLOW.
(3)Calculate;"
HAFC"=(FHHIGH-FHLOW)/100
D8
Horizontal Pull-in
Range
/
FHPH
/
FHPL
All:Preset
(1)Input a composite sync signal into Pin38.
(2)Decreasing the horizontal frequency from 17kHz, measure the
frequency at which H OUT synchronized with SCP Out(Pin29),
that is FHPH.
(3)Increasing the horizontal frequency from 14kHz, measure the
frequency at which H OUT synchronized with SCP Out(Pin29),
that is FHPL.
(4)Calculate; "
FHPH"=FHPH-15734
"
FHPL"=15625-FHPL
D9
H-OUT Voltage
/ VHOUTH
/ VHOUTL
All:Preset
(1)Measure the high level of H OUT at Pin32, that is "VHOUTH".
(2)Measure the low level of H OUT at Pin32, that is "VHOUTL".
D10
Horizontal Freq.
Dependence on Vcc
/
FHVCC
All:Preset
(1)Measure the H OUT frequency when H Vcc(Pin31) is
8.5V/9.5V, that is FHVCCH/FHVCCL.
(2)Calculate;"
FHVCC"=(FHVCCH-FHVCCL)/1
D11
FBP Phase
/ PHFBP
H-Sync. Phase
/ PHHSYNC
All:Preset
(1)Input a composite sync signal into Pin38.
(2)According to the following figure, measure "PHFBP" &
"PHHSYNC".
Sync in(Pin38)
H AFC(Pin29)
FBP in(Pin30)
tHOUT1
tHOUT2
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