參數(shù)資料
型號: TA1276AF
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): 31/83頁
文件大?。?/td> 1585K
代理商: TA1276AF
TA1276AF
2002-01-29
37
Test Conditions (unless otherwise stated, VCC1 = 5 V, VCC2/VCC3/DEF VCC = 9 V, Ta = 25 ± 3°C)
Switching Mode
Note
Parameter
SW15
SW49
SW50
SW53
Test Conditions
V3
Black Stretch Start Point (1)
C
OFF
A
C
1)
Set the BUS control data to the preset value.
2)
Set SW50 to A (maximum gain), turn the Y mute off (1), and turn the black stretch gain off.
3)
Connect pin 78 to an external power supply (PS), increase the voltage from V53, and plot the resulting change in
voltage S1 of pin 3.
4)
Next, turn the black stretch gain on (0), set the black stretch point 1 to the minimum (000), increase the PS voltage
from V53 as in 3), and plot the resulting change in voltage S2 of pin 3.
5)
Set the black stretch point 1 to the maximum (111), increase the PS voltage from V53 as in 3), and plot the change in
voltage S3 of pin 3.
6)
Use the diagram below to calculate the intersections VBST1 and VBST2 of S1, S2, and S3. Use the following formulas
to calculate PBST1 and PBST2.
PBST1 [(IRE)] = ((VBST1 [V] V49 [V] ÷ 1.4 [V]) × 100 [(IRE)]
PBST2 [(IRE)] = ((VBST2 [V] V49 [V] ÷ 1.4 [V]) × 100 [(IRE)]
Pin
V49
VBST2
S2 (asymptotic line)
S1
VBST1
Pin
S3
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