音影先锋亚洲天堂网|电影世界尽头的爱完整版播放|国产 熟女 91|高清无码免费观看欧美日韩|韩国一区二区三区黄色录像|美女亚洲加勒比在线|亚洲综合网 开心五月|7x成人在线入口|成人网站免费日韩毛片区|国产黄片?一级?二级?三级

TPS40074 Datasheet

  • TPS40074

  • 具有電壓前饋的中等范圍輸入同步降壓控制器

  • 38頁(yè)

  • TI

掃碼查看芯片數(shù)據(jù)手冊(cè)

上傳產(chǎn)品規(guī)格書(shū)

PDF預(yù)覽

TPS40074
SLUS617 鈥?APRIL 2005
www.ti.com
APPLICATION INFORMATION (continued)
SWITCHING FREQUENCY
vs
TIMING RESISTANCE
520
515
510
505
500
495
490
485
480
0
200
400
600
800
1000
f
SW
鈭?/div>
Switching Frequency
鈭?/div>
kHz
600
TYPICAL SWITCHING FREQUENCY
vs
INPUT VOLTAGE
500
R
T
鈭?/div>
Timing Resistance
鈭?/div>
k鈩?/div>
f
OSC
鈭?/div>
Frequency
鈭?/div>
kHz
400
300
200
100
0
2
6
10
14
18
22
V
DD
鈭?/div>
Input Voltage
鈭?/div>
V
26
30
Figure 3.
Figure 4.
PROGRAMMING THE RAMP GENERATOR CIRCUIT AND UVLO FUNCTION
The ramp generator circuit provides the actual ramp used by the PWM comparator and provides voltage
feed-forward by varying the PWM ramp slope as the line voltage changes. As the input voltage to the converter
increases, the slope of the PWM ramp increase by a proportionate amount. The programmable UVLO circuit
works by monitoring the level reached by the PWM ramp during a clock cycle. The PWM ramp must reach
approximately 1 V in amplitude during a clock cycle, or the converter is not be allowed to start. This
programmable UVLO point is set via a single resistor (R
KFF
) connected from KFF to VDD. R
KFF
, V
START
and R
RT
are related by (approximately)
R
KFF
V
UVLO(on)
+
0.018 R
KFF
)
5
)
0.5
R
T
(4)
where
鈥?/div>
鈥?/div>
V
UVLO(on)
is in volts
R
KFF
and R
T
are in k鈩?/div>
This yields typical numbers for the programmed startup voltage. The minimum and maximum values may vary up
鹵15% from this number.
Figure 5
through
Figure 7
show the typical relationship of V
UVLO(on)
, V
UVLO(off)
and R
KFF
at
three common frequencies.
10

TPS40074 PDF文件相關(guān)型號(hào)

TPS40100,TPS40222,TPS5130

TPS40074相關(guān)型號(hào)PDF文件下載

  • 型號(hào)
    版本
    描述
    廠商
    下載
  • 英文版
    Thermopile Detector
    PERKINELMER
  • 英文版
    Thermopile Detector
    PERKINELMER [Pe...
  • 英文版
    40 WATT OPEN - FRAME SWITCHING POWER SUPPLY
    TOTAL-POWER&nbs...
  • 英文版
    SWITCHING MODE 40W LOW COST BOX TYPE POWER SUPPLY
    TOTAL-POWER&nbs...
  • 英文版
    FOUR CHANNEL BRIDGED OUTPUT POWER STAGE
    TRIPATH [T...
  • 英文版
    Quad Thermopile
    PERKINELMER
  • 英文版
    Quad Thermopile
    PERKINELMER&nbs...
  • 英文版
    LOW-INPUT VOLTAGE-MODE SYNCHRONOUS BUCK CONTROLLER
    TI
  • 英文版
    LOW-INPUT VOLTAGE-MODE SYNCHRONOUS BUCK CONTROLLER
    TI [Texas ...
  • 英文版
    低輸入電壓模式同步降壓控制器
    TI
  • 英文版
    LOW-INPUT VOLTAGE-MODE SYNCHRONOUS BUCK CONTROLLER
    TI
  • 英文版
    LOW-INPUT VOLTAGE-MODE SYNCHRONOUS BUCK CONTROLLER
    TI [Texas ...
  • 英文版
    LOW-INPUT VOLTAGE-MODE SYNCHRONOUS BUCK CONTROLLER
    TI
  • 英文版
    LOW-INPUT VOLTAGE-MODE SYNCHRONOUS BUCK CONTROLLER
    TI [Texas ...
  • 英文版
    LOW-INPUT VOLTAGE-MODE SYNCHRONOUS BUCK CONTROLLER
    TI
  • 英文版
    LOW-INPUT VOLTAGE-MODE SYNCHRONOUS BUCK CONTROLLER
    TI [Texas ...
  • 英文版
    LOW-INPUT VOLTAGE-MODE SYNCHRONOUS BUCK CONTROLLER
    TI
  • 英文版
    LOW-INPUT VOLTAGE-MODE SYNCHRONOUS BUCK CONTROLLER
    TI [Texas ...
  • 英文版
    低輸入 (2.25V-5.5V) 300kHz 頻率的同步降壓控制器，具有輸出驅(qū)...
    TI
  • 英文版
    低輸入 (2.25V-5.5V) 600 kHz 頻率同步降壓控制器，具有輸出驅(qū)動(dòng)...
    TI

掃碼下載APP，
一鍵連接廣大的電子世界。

在線(xiàn)人工客服

買(mǎi)家服務(wù)：
賣(mài)家服務(wù)：
技術(shù)客服：

0571-85317607

網(wǎng)站技術(shù)支持

13606545031

客服在線(xiàn)時(shí)間周一至周五
9:00-17:30

關(guān)注官方微信號(hào)，
第一時(shí)間獲取資訊。

建議反饋

聯(lián)系人：

聯(lián)系方式：

按住滑塊，拖拽到最右邊
>>
感謝您向阿庫(kù)提出的寶貴意見(jiàn)，您的參與是維庫(kù)提升服務(wù)的動(dòng)力！意見(jiàn)一經(jīng)采納，將有感恩紅包奉上哦！