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参数资料
| 型号： | LA4917H |
| 元件分类： | 音频／视频放大 |
| 英文描述： | 7 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO28 |
| 封装： | 0.375 INCH, SOP-28 |
| 文件页数： | 6/8页 |
| 文件大小： | 96K |
| 代理商： | LA4917H |
LA4917H
No.A0322-6/8
Tj Monitor
14
1k
Notes on the Standby Function (STB, pin 4)
The amplifier is turned on by applying a level of 2.5V
(minimum) or higher to pin 4.
Pin 4 control voltage
Voltage applied to pin 4 (V)
Amplifier
Standby
0 to 1.0
Off
On
2.5 to 16
On
Off
The limit resistor RSTB may be inserted if the VST applied
voltage is comparatively high and there is a need to suppress
the pin 4 sink current.
Example : When it is necessary to limit the pin 4 sink current
to under 500
A.
RSTB =
VST-2VBE (about 1.4V)
500
A
-10k
Notes on the Self Diagnostics Function (PRO OUT, pin 1)
The self diagnostics function detects when a power amplifier
output pin has been shorted to VCC or ground and reports that
state to external circuits.
In the example shown at the right, during normal operation
this output will be at the high level, but if the protection
circuit operates, an internal transistor will be turned on and
the pin will go to the low level (about 0.2 to 0.3V).
Note that this circuit has an npn transistor open-collector
output.
* : This pin is left open when this function is not used.
Notes on the TJ MONI Function (pin 14)
The pin 14 internal circuit has diodes (three diodes connected in series) connected to ground as shown in the circuit
diagram figure. These diodes' forward voltage has the temperature dependence shown in the figure at the lower left.
The IC's internal junction temperature can be inferred using these characteristics.
4
RSTB
VST
2VBE
10k
10k
30k
+5V
RPRO
Output short
protection circuit
1
1k
Junction temperature, Tj – C
V14 -- Tj (Reference value)
Pin
14
voltage,
V
14
–V
0
1
1.5
2
2.5
0.5
0
50
100
150
200
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LA4919N | 制造商:SANYO 制造商全称:Sanyo Semicon Device 功能描述:Monolithic Linear IC Two-Channel 10W BTL High-Efficiency TV Audio Output Power Amplifier |
| LA4B-M1C2LV-G | 制造商:IDEC CORPORATION 功能描述:Switch Push Button N.O./N.C. DPDT Flush Rectangular Button 0.1A 250VAC 250VDC Momentary Contact PC Pins Panel Mount/Through Hole |
| LA4B-M1C2LV-W | 制造商:IDEC CORPORATION 功能描述:Switch Push Button N.O./N.C. DPDT Flush Rectangular Button 0.1A 250VAC 250VDC Momentary Contact PC Pins Panel Mount/Through Hole |
| LA4CA00 | 制造商:TE Connectivity 功能描述: |
| LA4CM00 | 制造商:TE Connectivity 功能描述: |
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