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參數(shù)資料
| 型號： | LV49157V-TLM-H |
| 廠商： | ON Semiconductor |
| 文件頁數(shù)： | 10/11頁 |
| 文件大小： | 0K |
| 描述： | IC AMP AUDIO CLASS D BTL 44SSOP |
| 標準包裝： | 2,000 |
| 類型： | D 類 |
| 輸出類型： | 2-通道（立體聲）帶立體聲耳機 |
| 在某負載時最大輸出功率 x 通道數(shù)量： | 15W x 2 @ 8 歐姆; 72mW x 2 @ 16 歐姆 |
| 電源電壓： | 9 V ~ 18 V |
| 特點： | 靜音，短路和熱保護，待機 |
| 安裝類型： | 表面貼裝 |
| 供應商設備封裝： | 44-SSOPJ |
| 封裝/外殼： | 44-LSSOP（0.220"，5.60mm 寬）裸露焊盤 |
| 包裝： | 帶卷 (TR) |
2006 Fairchild Semiconductor Corporation
www.fairchildsemi.com
FMS6143 Rev. 4.0.8
8
FMS6143
—
Low-Cost
Three-Channel
4th-Order
Standard
De
nition
V
ideo
Filter
Driver
The same method can be used for biased signals, with the
addition of a pull-up resistor to make sure the clamp never
operates. The internal pull-down resistance is 800kΩ
±20%, so the external resistance should be 7.5MΩ to set
the DC level to 500mV:
LCVF
Bias
Input
0.1μ
External video
source must
be AC coupled
500mV +/-350mV
75Ω
7.5MΩ
75Ω
Figure 14. Biased SCART with
DC-Coupled Outputs
The same circuits can be used with AC-coupled outputs if
desired.
DVD or
STB
SoC
DAC
Output
LCVF
Clamp
Active
0.1μ
0V - 1.4V
75Ω
220μ
Figure 15. DC-Coupled Inputs,
AC-Coupled Outputs
DVD or
STB
SoC
DAC
Output
75Ω
LCVF
Clamp
Active
0.1μ
0V - 1.4V
220μ
Figure 16. AC-Coupled Inputs and Outputs
Figure 17. Biased SCART with
AC-Coupled Outputs
NOTE:
The video tilt or line time distortion is dominated by
the AC-coupling capacitor. The value may need to be incre-
ased beyond 220μF to obtain satisfactory operation in
some applications.
Power Dissipation
The FMS6143 output drive conguration must be considered
when calculating overall power dissipation. Care must be
taken not to exceed the maximum die junction temperature.
The following example can be used to calculate the power
dissipation and internal temperature rise.
TJ = TA + Pd θJA
(1)
where: Pd = PCH1 + PCH2 + PCH3 and
(2)
PCHx = VCC ICH - (VO2/RL)
(3)
where: VO = 2VIN + 0.280V
(4)
ICH = (ICC/3) + (VO/RL)
(5)
VIN = RMS value of input signal
ICC = 19mA
VCC = 5V
RL = channel load resistance
Board layout can also affect thermal characteristics. Refer
to the Layout Considerations section for details.
The FMS6143 is specied to operate with output currents
typically less than 50mA, more than sufcient for a dual
(75Ω) video load. Internal ampliers are current limited to a
maximum of 100mA and should withstand brief-duration
short-circuit conditions. This capability is not guaranteed.
LCVF
Clamp
Active
0.1μ
External video
source must
be AC coupled
0V - 1.4V
220μ
75Ω
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