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参数资料
| 型号： | TA8795BF |
| 元件分类： | 消费家电 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP60 |
| 封装： | 14 X 14 MM, 0.80 MM PITCH, PLASTIC, QFP-60 |
| 文件页数： | 14/45页 |
| 文件大小： | 1139K |
| 代理商： | TA8795BF |
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TA8795BF
2001-01-15 21/45
TEST CONDITIONS : VCC = 5V, Ta = 25±3°C
SW No. AND VR (VARIABLE RESISTOR) MODE
No.
PARAMETER
SYMBOL
UNIT
MIN
TYP.
MAX
SW1 SW3 SW51 SW54 SW60
CON-
TRAST
BRIGHT-
NESS
SHARP-
NESS
TEST METHOD
V8
Contrast
adjustment
voltage
adjustment
Vct
V
2.1
3.0
―
OFF OFF
ON
OFF
Adjust
Center
1. To pin 2, input a signal with a video component
amplitude of 50mVp-p and a sine wave (f = 100kHz)
with a sync amplitude of 143mVp-p.
2. Adjust the bright VR so that the pin 44 pedestal is
0.95V.
3. Measure the pin 44 amplitude and determine 100%
and 0% of the pin 44 amplitude when the contrast VR
is at maximum and minimum respectively.
4. Adjust the contrast VR and measure the pin 55 voltage
(V90%, V10%) when the pin 44 amplitude is at 90%
and 10%. Calculate the following equation using the
result of V90% and V10%.
Vct = V90%V10%
V9
Contrast
adjustment gain
variation range
Gct
dB
12.0
15.0
―
OFF OFF
ON
OFF
Adjust
Center
1. To pin 2, input a signal with a video component
amplitude of 50mVp-p and a sine wave (f = 100kHz)
with a sync amplitude of 143mVp-p.
2. Adjust the bright VR so that the pin 44 pedestal is
0.95V.
3. Measure the pin 44 amplitude when the contrast VR is
at maximum and minimum respectively (V44max and
V44min). Calculate the following equation using the
result of V44max and V44min.
Gct = 20og (V44max / V44min)
V10 Brightness voltage
VBR
V
0.75
0.95
1.15
OFF OFF OFF
OFF
Center
Adjust r
Center
1. To pin 2, input a signal with a video component
amplitude of 50mVp-p and a sine wave (f = 100kHz)
with a sync amplitude of 143mVp-p.
2. Adjust the bright VR so that the pin 44 pedestal is
0.95V.
3. Measure the pin 52 DC voltage.
V11
Brightness control
sensitivity
GBR
0.4
0.5
0.6
OFF OFF OFF
OFF
Center
Adjust
Center
1. To pin 2, input a signal with a video component
amplitude of 50mVp-p and a sine wave (f = 100kHz)
with a sync amplitude of 143mVp-p.
2. Adjust the bright VR so that the pin 44 pedestal is
0.95V.
3. Adjust the bright VR so that the pin 52 DC voltage
increases by just 0.1V, then measure the pin 44
pedestal level V44H. Calculate the following equation
using the result.
GBR = (V44H0.95) / 0.1
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