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参数资料
| 型号： | TK15467S |
| 厂商： | TOKO INC |
| 元件分类： | 音频／视频放大 |
| 英文描述： | 1 CHANNEL, VIDEO AMPLIFIER, PDSO6 |
| 封装： | SOT-23, 6 PIN |
| 文件页数： | 2/12页 |
| 文件大小： | 300K |
| 代理商： | TK15467S |
TK15467S
GC3-J021
Page 10
12 APPLICATIONS INFORMATION
The low voltage operation is achieved with TK15467S. Therefore, please pay attention to the output capacitor. In case
of changing VCC by changing the video driver, refer this data sheet and reconsider the external components.
12-1 Output coupling capacity
Cout=47
F, and Csag=22F are recommended as a standard value. In case of changing capacity value, please refer to
the characteristics shown below.
Following waveforms are measured by with different Cout. “Field Square Wave” is used as input signal for
measurement whose output alternately black and white color in same screen as stripe, with the Csag capacity no change.
VCC=3.3V, Ta=25C, Vin=0.5VP-P(Field Square Wave), RL=150
Test Circuit
3
4
5
6
GND
Vcc = 3.3V
2
75
DRIVER
Input
1.2k
4k
+
1.2k
+
Clamp
1
Standby
75
0.1uF
33uF
Cout=
33u, 47u, 100u
22uF
VCC
0.01uF
A point of
measurement
Output
75
COUT=33F, CSAG=22F
COUT=47F, CSAG=22F
COUT=100F, CSAG=22F
Different SAG waveforms can be seen at the output when the Cout value was changed.
The SAG waveform will be smaller with larger Cout. The SAG voltage is 290mV with Cout 100
F, and 860mV with
33
F.
Actually, the waveforms appeared at the IC terminal are the mixed signal of the SAG voltage and Video signal.
For example, output amplitude is 2.86V with Cout 33
F (SAG voltage 0.86V and video signal amplitude 2.0V).
When 47
F or larger value was used, SAG is compensated. Therefore we recommend to use larger than 47F.
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