- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄377999 > MR2940 (Shindengen Electric Manufacturing Company, Ltd.) Provision for Standby mode operation Partial Resonance Power Supply IC Module PDF資料下載
參數(shù)資料
| 型號： | MR2940 |
| 廠商： | Shindengen Electric Manufacturing Company, Ltd. |
| 英文描述： | Provision for Standby mode operation Partial Resonance Power Supply IC Module |
| 中文描述： | 撥備待機(jī)模式操作局部共振電源IC模塊 |
| 文件頁數(shù)： | 9/19頁 |
| 文件大?。?/td> | 226K |
| 代理商： | MR2940 |
Shindengen Electric MFG.CO.,LTD
- 9 -
3.5 Output Voltage Control (normal operation)
The MR2000 Series controls output voltage with the ON
range proportional to the voltage at the F/B pin.
When the voltage at the F/B pin is 1.5V the ON range is
0
μ
s, and is controlled in a linear manner so that when the
voltage is 4.5V the ON range is 25
μ
s. A current of
200
μ
A=IF/B (typical) flows at the F/B pin, and the
impedance of the photocoupler transistor connected
externally between the F/B pin and GND is varied with the
control signal from the secondary output detection circuit,
thus controlling the ON range of the main switching device
to produce a constant voltage.
The maximum ON range is adjusted by setting the
maximum value for the voltage at the F/B pin using a
resistor connected externally between the F/B pin and GND.
3.6 Soft Drive Circuit (patent applied for)
The MR2000 Series supplies the main switching device
gate drive voltage from two separate drive circuits.
A voltage exceeding the threshold value for the main
switching device is supplied from the first drive circuit at the
leading edge of the drive voltage waveform to switch on the
main switching device with the optimum timing.
The drive voltage is then supplied gradually by the second
drive circuit (see Fig.3.9).
Supply of drive voltage in this manner reduces drive losses,
as well as reducing noise due to gate charge current and
discharge current when the resonating condenser is
switched on.
Fig.3.8 Output Voltage Control
Fig.3.9 Comparison of Drive Circuits
F/B pin
2
Output voltage controlled
by varying impedance of
photocoupler.
200
μ
A
5Vref
Droop
resistor
Output voltage
error detection
feedback signal
0
25
1.5
4.5
O
o
［
s
］
Feedback voltage
V
F/B
［
V
］
【
V
GE
】
【
I
G
】
【
I
C
】
Gate voltage supply
matched to collector
current.
Reactive charge
reduced under
light load.
Gate charge spikes
reduced.
Damping of resonating
condenser discharge
current.
【
MR2000 drive circuit
】
Large resonating
condenser discharge
current.
【
Conventional drive circuit
】
Gate charge remains
unchanged even when
collector current is small.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MS52C181A | 131,072-Word × 8-Bit STATIC RAM +1,048,576-Word × 8-Bit One Time PROM(128k字×8位靜態(tài)RAM+1M字×8位 OTPROM) |
| MS52C182A | 65,536-Word × 16-Bit or 131,072-Word × 8-Bit STATIC RAM +524,288-Word × 16-Bit or 1,048,576-Word × 8-Bit One Time PROM(64k字×16位或128k字×8位靜態(tài)RAM+512k字×16位或1M字×8位 OTPROM) |
| MS81V06160 | (401,408-word ⅴ 16-bit) FIFO memory |
| MS82V16520 | 262,144-Word x 32-Bit x 2-Bank Synchronous Graphics RAM |
| MSA180 | Piezo Speaker Amplifier |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MR2940-4109F12 | 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 VDS=900 Dev=IGBT RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| MR2940-7109F12 | 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 VDS=900 Dev=IGBT RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| MR2A08ACMA35 | 功能描述:NVRAM 4Mb 3.3V 35ns 512Kx8 Parallel MRAM RoHS:否 制造商:Maxim Integrated 數(shù)據(jù)總線寬度:8 bit 存儲容量:1024 Kbit 組織:128 K x 8 接口類型:Parallel 訪問時間:70 ns 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 工作電流:85 mA 最大工作溫度:+ 70 C 最小工作溫度:0 C 封裝 / 箱體:EDIP 封裝:Tube |
| MR2A08ACMA35R | 功能描述:NVRAM 4Mb 3.3V 35ns 512Kx8 Parallel MRAM RoHS:否 制造商:Maxim Integrated 數(shù)據(jù)總線寬度:8 bit 存儲容量:1024 Kbit 組織:128 K x 8 接口類型:Parallel 訪問時間:70 ns 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 工作電流:85 mA 最大工作溫度:+ 70 C 最小工作溫度:0 C 封裝 / 箱體:EDIP 封裝:Tube |
| MR2A08ACTS35C | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:256K x 16-Bit 3.3-V Asynchronous Magnetoresistive RAM |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。