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

TPS40055 Datasheet

  • TPS40055

  • 寬輸入 (8V-40V) 最高頻率 1MHz 的同步降壓控制器，具有輸出驅(qū)動(dòng)...

  • 634.57KB

  • 34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

PDF預(yù)覽

SLUS593B 鈭?DECEMBER 2003 鈭?REVISED APRIL 2004
TPS40054
TPS40055
TPS40057
APPLICATION INFORMATION
PROGRAMMING THE RAMP GENERATOR CIRCUIT
The ramp generator circuit provides the actual ramp used by the PWM comparator. The ramp generator
provides voltage feed-forward control by varying the PWM ramp slope with line voltage, while maintaining a
constant ramp magnitude. Varying the PWM ramp directly with line voltage provides excellent response to line
variations since the PWM does not have to wait for loop delays before changing the duty cycle. (See Figure 1).
VIN
VIN
SW
VPEAK
COMP
RAMP
tON1
t
d
+
ON
T
T1
tON2
T2
SW
RAMP
COMP
VVALLEY
tON1 > tON2 and d1 >
d2
UDG鈭?2131
Figure 1. Voltage Feed-Forward Effect on PWM Duty Cycle
The PWM ramp must be faster than the master clock frequency or the PWM is prevented from starting. The
PWM ramp time is programmed via a single resistor (R
KFF
) pulled up to VIN. R
KFF
is related to R
T
, and the
minimum input voltage, V
IN(min)
through the following:
R
KFF
+
V
IN (min)
*
3.5
where:
58.14
R
T
)
1340
W
(2)
D
V
IN(min)
is the ensured minimum start-up voltage. The actual start-up voltage is nominally about 10% lower
D
at 25擄C.
R
T
is the timing resistance in k鈩?/div>
The curve showing the R
KFF
required for a given switching frequency, f
SW
, is shown in Figure 3.
For low input voltage and high duty cycle applications, the voltage feed-forward may limit the duty cycle
prematurely. This does not occur for most applications. The voltage control loop controls the duty cycle and
regulates the output voltage. For more information on large duty cycle operation, refer to Application Note
(SLUA310).
www.ti.com
9

TPS40055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。

在線人工客服

買家服務(wù)：
賣家服務(wù)：
技術(shù)客服：

0571-85317607

網(wǎng)站技術(shù)支持

13606545031

客服在線時(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，您的參與是維庫(kù)提升服務(wù)的動(dòng)力！意見一經(jīng)采納，將有感恩紅包奉上哦！