- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄384040 > UPC1933GR (NEC Corp.) DC-DC CONVERTER CONTROL IC PDF資料下載
參數(shù)資料
| 型號： | UPC1933GR |
| 廠商： | NEC Corp. |
| 元件分類： | DC/DC變換器 |
| 英文描述： | DC-DC CONVERTER CONTROL IC |
| 中文描述： | 的DC - DC轉(zhuǎn)換器控制IC |
| 文件頁數(shù)： | 13/20頁 |
| 文件大?。?/td> | 119K |
| 代理商： | UPC1933GR |
Data Sheet G13690EJ3V0DS00
13
μ
PC1933
3.
NOTES ON USE
3.1
Setting the Output Voltage
Figure 3-1 illustrates the method of setting the output voltage. The output voltage is obtained using the formula shown in
the figure.
The input threshold value of the error amplifier is 0.3 V (TYP) for the error amplifier. Therefore, select a resistor value
that gives this voltage.
Figure 3-1 Setting the Output Voltage
3.2
Setting the Oscillation Frequency
Choose R
T
according to the oscillation frequency (f
OSC
) vs timing resistor (R
T
) characteristics (refer to
Typical
Characteristics Curves f
OSC
vs R
T
.) The formula below (3-1) gives an approximation of f
OSC
. However, the result of
formula 3-1 is only an approximation, and the value must be confirmed in actual operation, especially for high-frequency
operation.
f
OSC
[Hz]
1.856 x 10
9
/R
T
[
]
(3-1)
3.3
Preventing Malfunction of the Timer Latch-Method Short Circuit Protection Circuit
The timer latch short-circuit protection circuit operates when the error amplifier output (pin 8) exceed approximately 1.92
V, and cuts off the output. However, if the rise of the power supply voltage is fast, or if there is noise on the DLY pin (pin 2),
the latch circuit may malfunction and cut the output off.
To prevent this, lower the wiring impedance between the DLY pin and the GND pin (pin 6), and avoid applying noise to
the DLY pin.
1
8
R
NF
C
NF
R
2
R
1
0.3 V
V
OUT
(positive voltage)
V
OUT
= 1 + R
1
R
2
0.3
E/A
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| UPC1935 | DC-DC CONVERTER CONTROL IC |
| UPC1935GR | DC-DC CONVERTER CONTROL IC |
| UPC1943 | ADJUSTABLE PRECISION SHUNT REGULATORS |
| UPC1943T | ADJUSTABLE PRECISION SHUNT REGULATORS |
| UPC1944GR | ADJUSTABLE PRECISION SHUNT REGULATORS |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| UPC1933GR-A | 制造商:Renesas Electronics Corporation 功能描述: |
| UPC1934 | 制造商:NEC 制造商全稱:NEC 功能描述:DC-DC CONVERTER CONTROL IC |
| UPC1934GR-1JG | 制造商:NEC 制造商全稱:NEC 功能描述:DC-DC CONVERTER CONTROL IC |
| UPC1934GR-PJG | 制造商:NEC 制造商全稱:NEC 功能描述:DC-DC CONVERTER CONTROL IC |
| UPC1935 | 制造商:NEC 制造商全稱:NEC 功能描述:DC-DC CONVERTER CONTROL IC |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。