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

參數資料
型號: IRU3073CQTR
廠商: International Rectifier
文件頁數: 10/21頁
文件大小: 236K
描述: IC REG DL BCK/LINEAR 16-QSOP
標準包裝: 1
拓撲: 降壓(降壓)同步(1),線性(LDO)(1)
功能: 任何功能
輸出數: 2
頻率 - 開關: 210kHz ~ 400kHz
電壓/電流 - 輸出 1: 控制器
電壓/電流 - 輸出 2: 0.8 V ~ 22.5 V,65mA
帶 LED 驅動器:
帶監控器:
帶序列發生器:
電源電壓: 4.4 V ~ 25 V
工作溫度: 0°C ~ 70°C
安裝類型: 表面貼裝
封裝/外殼: 16-SSOP(0.154",3.90mm 寬)
供應商設備封裝: *
包裝: 剪切帶 (CT)
其它名稱: *IRU3073CQTR
IRU3073CQCT
10
Rev. 1.0
09/17/03
IRU3073
www.irf.com
FESR = ---(14)
1
2p3ESR3Co
PSW(TOTAL) = 133mW
FLC = ---(13)
1
2p3 LO3CO
RDS(ON) = 4mV31.5 = 6mV
ISET E IO(LIM) = 8A31.5 = 12A
(50% over nominal output current)
This results to: RSET E 4.8KV
Select: RSET = 5KV
VDS
VGS
10%
90%
td(ON)
td(OFF)
tr
tf
Figure 9 - Switching time waveforms.
From IRF7832 data sheet we obtain:
These values are taken under a certain condition test.
For more details please refer to the IRF7832 datasheet.
By using equation (12), we can calculate the total switch-
ing losses.
Programming the Over-Current Limit
The over-current threshold can be set by connecting a
resistor (RSET) from drain of low side MOSFET to the
OCSet pin. The resistor can be calculated by using equa-
tion (2).
The RDS(ON) has a positive temperature coefficient and it
should be considered for the worse case operation.
Feedback Compensation
The IRU3073 is a voltage mode controller; the control
loop is a single voltage feedback path including error
amplifier and error comparator. To achieve fast transient
response and accurate output regulation, a compensa-
tion circuit is necessary. The goal of the compensation
network is to provide a closed loop transfer function with
the highest 0dB crossing frequency and adequate phase
margin (greater than 458).
Gain
FLC
0dB
Phase
08
FLC
-1808
Frequency
Frequency
-40dB/decade
The output LC filter introduces a double pole, 40dB/
decade gain slope above its corner resonant frequency,
and a total phase lag of 1808 (see Figure 10). The Reso-
nant frequency of the LC filter is expressed as follows:
Figure 10 shows gain and phase of the LC filter. Since
we already have 1808 phase shift just from the output
filter, the system risks being unstable.
Figure 10 - Gain and phase of LC filter.
The IRU3073s error amplifier is a differential-input
transconductance amplifier. The output is available for
DC gain control or AC phase compensation.
The E/A can be compensated with or without the use of
local feedback. When operated without local feedback,
the transconductance properties of the E/A become evi-
dent and can be used to cancel one of the output filter
poles. This will be accomplished with a series RC circuit
from Comp pin to ground as shown in Figure 11.
Note that this method requires that the output capacitor
should have enough ESR to satisfy stability requirements.
In general, the output capacitors ESR generates a zero
typically at 5KHz to 50KHz which is essential for an
acceptable phase margin.
The ESR zero of the output capacitor expressed as fol-
lows:
IRF7832
tr = 12.3ns
tf = 21ns
相關PDF資料
PDF描述
ISL25700FRUZ-TK IC TEMP SWITCH MFET DRVR 10TQFN
ISL6150IB IC CTRLR HOT PLUG NEG VOLT 8SOIC
ISL6151IB-T IC CTRLR HOT PLUG NEG VOLT 8SOIC
ISL6160CB-T IC CTRLR BULK/AUXILIARY 14-SOIC
ISL6161CB-T IC CTRLR PWR DISTRIB DUAL 14SOIC
相關代理商/技術參數
參數描述
IRU3137 制造商:IRF 制造商全稱:International Rectifier 功能描述:8-PIN SYNCHRONOUS PWM CONTROLLER
IRU3137CS 制造商:IRF 制造商全稱:International Rectifier 功能描述:8-PIN SYNCHRONOUS PWM CONTROLLER
IRU3137CSTR 功能描述:IC REG CTRLR BUCK PWM VM 8-SOIC RoHS:否 類別:集成電路 (IC) >> PMIC - 穩壓器 - DC DC 切換控制器 系列:- 標準包裝:4,000 系列:- PWM 型:電壓模式 輸出數:1 頻率 - 最大:1.5MHz 占空比:66.7% 電源電壓:4.75 V ~ 5.25 V 降壓:是 升壓:無 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-40°C ~ 85°C 封裝/外殼:40-VFQFN 裸露焊盤 包裝:帶卷 (TR)
IRU3137CSTRPBF 功能描述:IC REG CTRLR BUCK PWM VM 8-SOIC RoHS:是 類別:集成電路 (IC) >> PMIC - 穩壓器 - DC DC 切換控制器 系列:- 標準包裝:4,000 系列:- PWM 型:電壓模式 輸出數:1 頻率 - 最大:1.5MHz 占空比:66.7% 電源電壓:4.75 V ~ 5.25 V 降壓:是 升壓:無 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-40°C ~ 85°C 封裝/外殼:40-VFQFN 裸露焊盤 包裝:帶卷 (TR)
IRU3138 制造商:IRF 制造商全稱:International Rectifier 功能描述:SYNCHRONOUS PWM CONTROLLER FOR TERMINATION POWER SUPPLY APPLICATIONS
主站蜘蛛池模板: 南江县| 汕尾市| 虎林市| 金阳县| 南召县| 新龙县| 伊通| 甘德县| 嵩明县| 惠来县| 长宁区| 扶风县| 白朗县| 南阳市| 铅山县| 定州市| 乐安县| 乌恰县| 宝应县| 邵东县| 虹口区| 台前县| 贵州省| 留坝县| 车致| 体育| 恩施市| 阿城市| 象州县| 桐城市| 新丰县| 师宗县| 宜昌市| 蒙阴县| 扬中市| 阿合奇县| 南丹县| 靖安县| 故城县| 习水县| 南和县|