欧美成人免费电影,国产欧美一区二区三区精品酒店,精品国产a毛片,色网在线免费观看

參數(shù)資料
型號(hào): MAX828EUK-T
廠(chǎng)商: MAXIM INTEGRATED PRODUCTS INC
元件分類(lèi): 穩(wěn)壓器
英文描述: IC-SM-VOLTAGE INVERTER
中文描述: SWITCHED CAPACITOR CONVERTER, 20 kHz SWITCHING FREQ-MAX, PDSO5
封裝: SOT-23, 5 PIN
文件頁(yè)數(shù): 6/18頁(yè)
文件大?。?/td> 158K
代理商: MAX828EUK-T
MAX828, MAX829
http://onsemi.com
6
MAX828: C
1
= C
2
= C
3
= 10
F
MAX829: C
1
= C
2
= C
3
= 3.3 F
6
4
2
3
1
OSC
V
out
C
1
C
2
+
R
L
+
+C
3
V
in
Figure 20. Test Setup/Voltage Inverter
DETAILED OPERATING DESCRIPTION
The MAX828/829 charge pump converters inverts the
voltage applied to the V
in
pin. Conversion consists of a
twophase operation (Figure 21). During the first phase,
switches S
2
and S
4
are open and S
1
and S
3
are closed. During
this time, C
1
charges to the voltage on V
in
and load current
is supplied from C
2
. During the second phase, S
2
and S
4
are
closed, and S
1
and S
3
are open. This action connects C
1
across C
2
, restoring charge to C
2
.
Figure 21. Ideal Switched Capacitor Charge Pump
S3
S4
C
2
C
1
S1
S2
V
in
V
out
From Osc
APPLICATIONS INFORMATION
Output Voltage Considerations
The MAX828/829 performs voltage conversion but does
not provide regulation. The output voltage will drop in a
linear manner with respect to load current. The value of this
equivalent output resistance is approximately 26 nominal
at 25
°
C and V
in
= 5.0 V. V
out
is approximately 5.0 V at light
loads, and drops according to the equation below:
VDROP
Iout
Rout
Vout
(Vin
VDROP)
Charge Pump Efficiency
The overall power efficiency of the charge pump is
affected by four factors:
1. Losses from power consumed by the internal
oscillator, switch drive, etc. (which vary with input
voltage, temperature and oscillator frequency).
2. I
2
R losses due to the onresistance of the MOSFET
switches onboard the charge pump.
3. Charge pump capacitor losses due to Equivalent
Series Resistance (ESR).
4. Losses that occur during charge transfer from the
commutation capacitor to the output capacitor when
a voltage difference between the two capacitors
exists.
Most of the conversion losses are due to factors 2, 3 and 4.
These losses are given by Equation 1.
PLOSS(2,3,4)
Iout
2
Rout
Iout
2
1
(fOSC)C1
8RSWITCH
4ESRC1
ESRC2
(eq. 1)
The 1/(f
OSC
)(C
1
) term in Equation 1 is the effective output
resistance of an ideal switched capacitor circuit (Figures 22
and 23).
The losses due to charge transfer above are also shown in
Equation 2. The output voltage ripple is given by Equation 3.
0.5C2(VRIPPLE
2
2VoutVRIPPLE)]
fOSC
PLOSS
[ 0.5C1(Vin
2
Vout
2
)
(eq. 2)
VRIPPLE
Iout
(fOSC)(C2)
2(Iout)(ESRC2)
(eq. 3)
R
L
C
2
C
1
V
in
V
out
f
Figure 22. Ideal Switched Capacitor Model
R
L
C
2
V
in
V
out
R
EQUIV
REQUIV
1
f
C1
Figure 23. Equivalent Output Resistance
相關(guān)PDF資料
PDF描述
MAX829EUK-T IC-SMD-SWT CAPACITOR INVERTER
MAX828 Parallel-Load 8-Bit Shift Registers 16-CDIP -55 to 125
MAX829 Switched Capacitor Voltage Converter
MAX829EUK Parallel-Load 8-Bit Shift Registers 16-CDIP -55 to 125
MAX828EUKG Switched Capacitor Voltage Converter
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX828SNTR 制造商:Rochester Electronics LLC 功能描述:- Tape and Reel 制造商:ON Semiconductor 功能描述:
MAX829 制造商:ONSEMI 制造商全稱(chēng):ON Semiconductor 功能描述:Switched Capacitor Voltage Converter
MAX829C/D 制造商:MAXIM 制造商全稱(chēng):Maxim Integrated Products 功能描述:Switched-Capacitor Voltage Inverters
MAX829C/D DIE 制造商:Maxim Integrated Products 功能描述:
MAX829EUK 功能描述:電荷泵 Switched Cap Voltage RoHS:否 制造商:Maxim Integrated 功能:Inverting, Step Up 輸出電壓:- 1.5 V to - 5.5 V, 3 V to 11 V 輸出電流:100 mA 電源電流:1 mA 最大工作溫度:+ 70 C 封裝 / 箱體:SOIC-8 Narrow 封裝:Tube
主站蜘蛛池模板: 剑阁县| 庆云县| 临夏市| 凉城县| 和政县| 同德县| 文水县| 宜君县| 河北区| 辽阳县| 武冈市| 海城市| 那曲县| 凤翔县| 丰顺县| 云梦县| 揭阳市| 苍梧县| 崇礼县| 德阳市| 修水县| 晋城| 汝阳县| 乳山市| 独山县| 无极县| 尚志市| 建宁县| 沭阳县| 昌图县| 南投县| 察隅县| 织金县| 社会| 苏尼特右旗| 高平市| 十堰市| 西城区| 荥经县| 新兴县| 壤塘县|