TA1276AFG Datasheet, PDF (43/83 Pages) Toshiba Semiconductor – PAL/NTSC Video Chroma And Deflection IC For CTV

Note
Parameter
V₁₁
DC Transmission
Compensation Limit Point
TA1276AFG
Test Conditions (unless otherwise stated, V_CC1 = 5 V, V_CC2/V_CC3/DEF V_CC = 9 V, Ta = 25 ± 3°C)
Switching Mode
SW₁₅ SW₄₉ SW₅₀ SW₅₃
Test Conditions
1) Set the BUS control data to the preset value.
2) Turn the Y mute off (1), turn the video mute off (0), and with the unicolor set at maximum (1111111), connect pin 3 to
an external power supply (PS).
3) Set the DC transmission compensation rate to the maximum (111).
4) Increase the PS from 5 V, observe pin 11, and plot the DC transmission compensation rate.
5) Repeat 4) above but change the DC transmission compensation limit point data. Calculate P_DTL60, P_DTL73, P_DTL87,
and P_DTL100 from the measured data and the following formulas.
P_DTL60 = ((V_L60 − V₄₉)/1.0) × 100 [%]
P_DTL73 = ((V_L73 − V₄₉)/1.0) × 100 [%]
P_DTL87 = ((V_L87 − V₄₉)/1.0) × 100 [%]
P_DTL100 = ((V_L100 − V₄₉)/1.0) × 100 [%]
Pin
C
ON
B
C
100% (00)
87% (01)
73% (10)
60% (11)
Pin
V_L60
V_L100
V_L73 V_L87
43
2002-04-01