- 您現(xiàn)在的位置：買(mǎi)賣(mài)IC網(wǎng) > PDF目錄67411 > FA13845N 1 A SWITCHING CONTROLLER, 57 kHz SWITCHING FREQ-MAX, PDSO8 PDF資料下載
參數(shù)資料
| 型號(hào)： | FA13845N |
| 元件分類(lèi)： | 穩(wěn)壓器 |
| 英文描述： | 1 A SWITCHING CONTROLLER, 57 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封裝： | SOP-8 |
| 文件頁(yè)數(shù)： | 6/15頁(yè) |
| 文件大?。?/td> | 151K |
| 代理商： | FA13845N |
第1頁(yè)第2頁(yè)第3頁(yè)第4頁(yè)第5頁(yè)當(dāng)前第6頁(yè)第7頁(yè)第8頁(yè)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)
FA13842, 13843, 13844, 13845
14
Fig. 22
Fig. 23
Fig. 24
to
t1
iL
Converge
iLs
iL
-Kc
Lu
Ton
T
to
t1
Compensated
-Ld
Is
Vcc
ENB 2.5V
5VREF
ENB
OUTPUT
UVLO
OSC
30V
RT/CT
FB
COMP
ISNS
VREF
OUT
GND
ER AMP 2R
C10
Rs
R18
MOSFET
1R
1V
S
FF
Q
QB
R
Vcc
Vin
VCC
UVLO
Output
R25
R24
R27
R26 C13
Tr7
7
4
2
1
8
6
5
3
RT
CT
Fig. 25
Vcc
ENB 2.5V
5VREF
ENB
OUTPUT
UVLO
OSC
30V
RT/CT
FB
COMP
ISNS
VREF
OUT
GND
ER AMP 2R
C10
Rs
R18
MOSFET
1R
1V
S
FF
Q
QB
R
Vcc
Vin
VCC
UVLO
Output
R25
R24
R27
R26 C13
Tr7
7
8
6
5
4
2
1
3
RT
CT
Fig. 22 illustrates a case when the inductor current variation
iL’ at t1 is smaller than iL at t0. In this case, inductor current
variations gradually converges and the inductor current
becomes stable.
It is necessary to apply slope compensation to the control
signals in order to prevent such subharmonic oscillations when
the inductor current is continuous and the duty cycle is greater
than 50%.
The waveform of the inductor current when slope
compensation is applied is shown in Fig. 23.
Slope compensation adds the negative slope of inclination
–Kc to the control signal of the inductor peak current.
iL’ shows the variation of the inductor current at t1 when
slope compensation is not applied, and
iL’ s shows the
variation of the inductor current at t1 when slope compensation
is applied.
Thus,
iL’ can be changed by –Kc, and IL’ s becomes smaller
when –Kc is large. It is necessary to apply slope
compensation to satisfy the equation
iL ≥ iL’s, that is,
I –Kc I
≥ I –1/2 Ld I
as the condition which achieves stable
operation.
Typical circuits are shown in Fig. 24 and 25.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| FA13842P | 1 A SWITCHING CONTROLLER, 57 kHz SWITCHING FREQ-MAX, PDIP8 |
| FA13845P | 1 A SWITCHING CONTROLLER, 57 kHz SWITCHING FREQ-MAX, PDIP8 |
| FA13844P | 1 A SWITCHING CONTROLLER, 57 kHz SWITCHING FREQ-MAX, PDIP8 |
| FA5304AS | 1.5 A SWITCHING CONTROLLER, 600 kHz SWITCHING FREQ-MAX, PDSO8 |
| FA5305AS | 1.5 A SWITCHING CONTROLLER, 600 kHz SWITCHING FREQ-MAX, PDSO8 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| FA13845P | 制造商:FUJI 制造商全稱(chēng):Fuji Electric 功能描述:CMOS IC(For Switching Power Supply Control) |
| FA13845P-D1 | 制造商:Fuji Electric 功能描述: |
| FA138FFP | 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:Current-Mode SMPS Controller |
| FA138T87 | 制造商:Atlas Sound 功能描述:8'' High Power 70V Coaxial Loudspeaker - 100W |
| FA14015A | 制造商:Square D by Schneider Electric 功能描述:MOLDED CASE CB 480Y/277V 15A |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。