- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄384039 > UPC1909 (NEC Corp.) Isolated Flyback Switching Regulator with 9V Output PDF資料下載
參數(shù)資料
| 型號(hào)： | UPC1909 |
| 廠商： | NEC Corp. |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | Isolated Flyback Switching Regulator with 9V Output |
| 中文描述： | 隔離反激式開(kāi)關(guān)穩(wěn)壓9V輸出 |
| 文件頁(yè)數(shù)： | 9/16頁(yè) |
| 文件大?。?/td> | 85K |
| 代理商： | UPC1909 |
第1頁(yè)第2頁(yè)第3頁(yè)第4頁(yè)第5頁(yè)第6頁(yè)第7頁(yè)第8頁(yè)當(dāng)前第9頁(yè)第10頁(yè)第11頁(yè)第12頁(yè)第13頁(yè)第14頁(yè)第15頁(yè)第16頁(yè)
Data Sheet G14309EJ1V0DS00
9
μ
PC1909
TIMING CHART
t
qc
V
d
Oscillation
waveform C
T
Feedback input
FB
OUT
1
output waveform
OUT
2
output waveform
Oscillation
waveform C
T
’
t
qd
(1) Oscillation waveform (C
T
)
This waveform is determined by the external capacitor connected to the C
T
pin (pin 16) and the external resistor
connected to the R
T
pin (pin 15). It is usually a 1.5-V to 3.5-V triangle waveform (the rise and fall times are the
same).
(2) Output waveform (OUT
1
)
Whichever is the lower of the DTC
1
pin (pin 13) and FB pin (pin 12) voltages is compared with the triangle wave
of the C
T
pin (pin 16). The OUT
1
pin (pin 11) is high level while the triangle wave is low.
(3) Output waveform (OUT
2
)
Whichever is the higher of the DTC
2
pin (pin 5) and FB pin (pin 12) voltages is compared with the level-shifted
triangle wave (C
T
’). The OUT
2
pin (pin 6) is high level while the level-shifted triangle wave is high.
(4) Triangle wave level shift
The triangle wave that controls OUT
2
is the original triangle wave of the C
T
pin (pin 16) shifted to a lower
potential via the level shift circuit (OLS). The amount of shift (V
d
) can be adjusted using the resistor (R
CT2
)
connected between the C
T2
pin (pin 2) and the V
REF
pin.
The relationship between the shift amount (V
d
) and the resistance value (k
) of the resistor R
CT2
connected to
the C
T2
pin (pin 2) is as follows.
V
d
=
×
2 [V]
R
CT2
[k
] + 10
4.3
(5) Dead-time (t
qc
, t
qd
) adjustment
The dead time between the fall of OUT
1
and the rise of OUT
2
(t
qc
) and the dead time between the fall of OUT
2
and the rise of OUT
1
(t
qd
) is determined by the oscillation frequency and the amount of level shift of the triangle
wave. Although usually t
qc
= t
qd
, if setting these independently, connect a suitable resistor between the C
T
pin
and the V
REF
pin, as well as between the C
T
pin and GND, and adjust the dead time by making the oscillation
waveform asymmetrical.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| UPC1909CX | Isolated Flyback Switching Regulator with 9V Output |
| UPC1909GS | Isolated Flyback Switching Regulator with 9V Output |
| UPC1933 | DC-DC CONVERTER CONTROL IC |
| UPC1933GR | DC-DC CONVERTER CONTROL IC |
| UPC1935 | DC-DC CONVERTER CONTROL IC |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| UPC1909CX | 制造商:NEC 制造商全稱:NEC 功能描述:SWITCHING REGULATOR CONTROL IC |
| UPC1909CX-A | 制造商:Renesas Electronics Corporation 功能描述: |
| UPC1909GS | 制造商:NEC 制造商全稱:NEC 功能描述:SWITCHING REGULATOR CONTROL IC |
| UPC1909GS-A | 制造商:Renesas Electronics Corporation 功能描述: |
| UPC1933 | 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(gòu)，3分鐘左右您將得到回復(fù)。