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參數(shù)資料
| 型號： | TB1261F |
| 元件分類： | 消費家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP80 |
| 封裝： | 14 X 20 MM, 0.80 MM PITCH, PLASTIC, QFP-80 |
| 文件頁數(shù)： | 47/66頁 |
| 文件大?。?/td> | 1538K |
| 代理商： | TB1261F |
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TB1261F/TB1262F
2002-6-30 51 / 66
DEF STAGE
Note
Items/Symbols
Bus
Bus conditions
conditions
Measurement methods
D1
AFC Inactive Period
/ T50AFCOFF
/ T60AFCOFF
All: Preset
(1) Input a 50Hz/60Hz composite sync signal into Pin61.
(2) Measure "T50AFCOFF" / "T60AFCOFF" at Pin43. (cf. Fig.D1)
D2
H-OUT Start Voltage
/ VHON
All: Preset
(1) Let Pin11, 25, 67and 74 be open.
(2) Increasing Pin45 voltage, measure the voltage at which H
OUT pulse appears at Pin39, that is "VHON".
D3
H-OUT Pulse Duty
/ WHOUT
All: Preset
command IIC read
(1) Measure tHOUT1 & tHOUT2 at Pin39.
(2) Calculate ;"WHOUT"=tHOUT1/(tHOUT1+tHOUT2)*100
tHOUT1
tHOUT2
D4
H-OUT Freq. on AFC
Stop Mode
/ FHAFCOFF
AFC
Gain:11
(OFF)
Others: Preset
(1) Input a 50Hz composite sync signal into Pin61.
(2) Measure the H OUT frequency at Pin32, that is
"FHAFCOFF".
D5
Horizontal
Free-run Frequency
/ FHFR
V-Freq:001/010
Others: Preset
(1) Measure the H OUT frequency at Pin61, that is "FH50FR"
/ "FH60FR".
D6
Horizontal
Freq.
Variable Range
/ FHMAX
/ FHMIN
All: Preset
(1) Connect Pin43 to Vcc via a 10kΩ and measure the H OUT
frequency at Pin39, that is "FHMIN".
(2) Connect Pin43 to GND via a 68kΩ and measure the H
OUT frequency at Pin39, that is "FHMAX".
D7
Horizontal
Freq.
Control Sensitivity
/ βHAFC
All: Preset
(1) Measure the Pin39 voltage at which H OUT frequency is
15.734kHz, that is VH15734.
(2) Measure the H OUT frequency when Pin43 voltage is
VH15734 + 50mV /VH15734 - 50mV, that is FHLOW / FHHIGH.
(3) Calculate;"βHAFC"=(FHHIGH-FHLOW)/100
D8
Horizontal Pull-in
Range
/ ΔFHPH
/ ΔFHPL
All: Preset
(1) Input a composite sync signal into Pin61.
(2) Decreasing the horizontal frequency from 17kHz, measure
the frequency at which H OUT synchronized with Sync
in(Pin61), that is FHPH.
(3) Increasing the horizontal frequency from 14kHz, measure
the frequency at which H OUT synchronized with Sync
in(Pin61), that is FHPL.
(4) Calculate; "ΔFHPH"=FHPH-15734
"ΔFHPL"=15625-FHPL
D9
H-OUT Voltage
/ VHOUTH
/ VHOUTL
All:
Preset (1) Measure the high level of H OUT at Pin39, that is
"VHOUTH".
(2) Measure the low level of H OUT at Pin39, that is "VHOUTL".
D10
Horizontal Freq.
Dependence on Vcc
/ ΔFHVCC
All: Preset
(1) Measure the H OUT frequency when H Vcc(Pin45) is
8.5V/9.5V, that is FHVCCH/FHVCCL.
(2) Calculate;"ΔFHVCC"=(FHVCCH-FHVCCL)/1
D11
FBP Phase
/ PHFBP
H-Sync. Phase
/ PHHSYNC
All: Preset
(1) Input a composite sync signal into Pin61.
(2) According to the following figure, measure "PHFBP" &
"PHHSYNC".
Sync in(Pin61)
H AFC(Pin43)
FBP in(Pin37)
63.5
s
4.7
s
PH
FBP
PH
HSYNC
0.25V
a
a/2
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