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參數(shù)資料
| 型號： | 2SK3742 |
| 元件分類： | JFETs |
| 英文描述： | 5 A, 900 V, 2.5 ohm, N-CHANNEL, Si, POWER, MOSFET |
| 封裝： | LEAD FREE, 2-10U1B, SC-67, 3 PIN |
| 文件頁數(shù)： | 5/6頁 |
| 文件大小： | 194K |
| 代理商： | 2SK3742 |
LA1266
No.2291-5/11
3. Local OSC buffer output
When local OSC buffer output waveform is saw-toothed at the SW mode, connect a reistance of 1.2kΩ or
thereabouts across pin 24 and GND.
4. Capacitance across pin 9 and GND
A large capacitance across pin 9 and GND may cause a
misstop at an adjacent channel when the channel select
speed is made faster at the autmatic channel select mode.
In thes case, decrease the capacitance across pin 9 and
GND.
However, if too decreased, the LED will flutter at low
modulation frequencies at the time of detuning. Therefore,
it is recommended to fix the capacitance across pin 9 and
GND to be 3.3
μF to 10μF. The relation between
modulation frequency and demodulation output voltage
on pin 9 with the capacitance across pin 9 and GND as a
parameter is shown right.
5. If the coupling coefficient of the local OSC coil is small and an antiresonance point of approximately 100MHz is
present or the stray capacitance across pin 24 and pin 23 is large, a parasitic oscillation of approximately 100MHz may
occur in the buffer output (pin 24). In this case, connect a capacitance of approximately 30pF across pin 24 and GND.
6. AM OSC coil
Generally speaking, the following should be noted. Avoid winding with loose coupling between primary side and
secondary side (especially SW1, SW2). To be concrete, the pot core type is better than the screw type which is loose
in coupling. This prevents the local OSC frequency from turning third resonance
frequency related to the coupling coefficient.
7. Resistance across pin 8 and VDD
If pin 8 is used for stop signal (SD) only, without using LED, it is recommended
to fix resistance RL across pin 8 and VDD to be 51kΩ to 100kΩ.
8. To prevent whistle from worsening, make the pattern of AM output pin 15 as short as possible.
9. AM, FM IF buffer output
Application of a voltage to pin 13 (STRQ) causes AM IF(455kHz) signal (at AM mode) and FM IF(10.7MHz) signal
(at FM mode) to be delivered at pin 11 and pin 10, respectively. It is recommended that the voltage to be applied to
Test Circuit : FM, AM-MW
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| 2SK374R | 30 mA, N-CHANNEL, Si, SMALL SIGNAL, JFET, TO-236 |
| 2SK0374R | 30 mA, N-CHANNEL, Si, SMALL SIGNAL, JFET, TO-236 |
| 2SK374Q | 30 mA, N-CHANNEL, Si, SMALL SIGNAL, JFET, TO-236 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 2SK3742(Q) | 功能描述:MOSFET N-Ch 900V 5A Rdson 2.5 Ohm RoHS:否 制造商:STMicroelectronics 晶體管極性:N-Channel 汲極/源極擊穿電壓:650 V 閘/源擊穿電壓:25 V 漏極連續(xù)電流:130 A 電阻汲極/源極 RDS（導(dǎo)通）:0.014 Ohms 配置:Single 最大工作溫度: 安裝風(fēng)格:Through Hole 封裝 / 箱體:Max247 封裝:Tube |
| 2SK3742(Q,M) | 功能描述:MOSFET N-Ch 900V 5A 45W PD Rdson 2.2 Ohm RoHS:否 制造商:STMicroelectronics 晶體管極性:N-Channel 汲極/源極擊穿電壓:650 V 閘/源擊穿電壓:25 V 漏極連續(xù)電流:130 A 電阻汲極/源極 RDS（導(dǎo)通）:0.014 Ohms 配置:Single 最大工作溫度: 安裝風(fēng)格:Through Hole 封裝 / 箱體:Max247 封裝:Tube |
| 2SK3742(STA4,Q) | 制造商:Toshiba America Electronic Components 功能描述: |
| 2SK3743(Q) | 制造商:Toshiba America Electronic Components 功能描述: |
| 2SK3744-TL-E | 制造商:Sony Semiconductor Solutions Division 功能描述: |
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