TA1276AFG Datasheet, PDF (42/83 Pages) Toshiba Semiconductor – PAL/NTSC Video Chroma And Deflection IC For CTV

Note
Parameter
V₁₀
DC Transmission
Compensation Start 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) Repeat steps 1) and 2) of V₂₁.
2) Measure the amplitude V₄₃ of pin 11, set the PS to V₅₃ + 0.7 V, and adjust V₄₃ to around 1.0 V_p-p using unicolor.
3) With the DC transmission compensation rate at the minimum (000), increase PS from V₅₃ and plot the relationship
between the voltages of pins 3 and 11.
4) Next, with the DC transmission compensation rate at the maximum (111), increase PS from V₅₃ and plot the
relationship between the voltages of pins 3 and 11.
5) With the DC transmission compensation rate at the maximum (111), increase the PS from V₅₃ when the DC
transmission compensation start point reaches the maximum (111) and plot the relationship between the voltages of
pins 3 and 11.
C
ON
B
6) Calculate V_DT0 and V_DT42 from the following formula.
V_DT0 = ((V_SP0 − V₄₉)/1 [V]) × 100 [%]
V_DT42 = ((V_SP42 − V₄₉)/1 [V]) × 100 [%]
C
DC transmission
Pin
compensation start point
DC transmission
compensation start point
VSP0
V_PC
DC transmission compensation rate 000
VSP42
Pin
42
2002-04-01