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)...

  • 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(shū)

PDF預(yù)覽

SLUS593B 鈭?DECEMBER 2003 鈭?REVISED APRIL 2004
TPS40054
TPS40055
TPS40057
DESIGN EXAMPLE
6. Calculate the inductor value
The inductor value is calculated from equation (4).
L
+
(24
*
3.3 V) 3.3 V
+
2.96
mH
24 V 3.2 A 300 kHz
(61)
A 2.9-碌H Coev DXM1306鈭?R9 or 2.6-碌H Panasonic ETQ鈭扨6F2R9LFA can be used.
7. Setting the switching frequency
The clock frequency is set with a resistor (R
T
) from the RT pin to ground. The value of R
T
can be found from
equation (1), with f
SW
in kHz.
R
T
+
1
17.82
10
*6
*
17
kW
+
170 kW
N
use 169 kW
(62)
f
SW
8. Programming the ramp generator circuit
The PWM ramp is programmed through a resistor (R
KFF
) from the KFF pin to V
IN
. The ramp generator also
controls the input UVLO voltage. For an undervoltage level of 10 V, R
KFF
can be calculated from (2)
R
KFF
+
V
IN(min)
*
3.5 58.14
R
T
)
1340 kW
+
72.5 kW
N
use 71.5 kW
(63)
9. Calculating the output capacitance (C
O
)
In this example the output capacitance is determined by the load response requirement of
鈭哣
= 0.3 V for a 1 A
to 8 A step load. C
O
can be calculated using (14)
C
O
+
2.9
m
(8 A)
*
(1 A)
(3.3)
*
(3.0)
2
2
2
2
+
97
mF
(64)
Using (7) we can calculate the ESR required to meet the output ripple requirements.
33 mV
+
3.2 A ESR
)
8
73
mF
1
300 kHz
(65)
(66)
ESR
+
10.3 mW
*
3.33 mW
+
6.97 mW
For this design example two (2) Panasonic SP EEFUEOJ1B1R capacitors, (6.3 V, 180
碌F,
12 m鈩? are used.
10. Calculate the soft-start capacitor (C
SS
)
This design requires a soft鈭抯tart time (t
START
) of 1 ms. C
SS
can be calculated on (16)
C
SS
+
2.3
mA
0.7 V
1 ms
+
3.29 nF
+
3300 pF
(67)
28
www.ti.com

TPS40055相關(guān)型號(hào)PDF文件下載

您可能感興趣的PDF文件資料

熱門(mén)IC型號(hào)推薦

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
返回頂部

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！