參數(shù)資料
型號(hào)： TPS40055PWP
廠商： TEXAS INSTRUMENTS INC
元件分類： 穩(wěn)壓器
英文描述： SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PDSO16
封裝： GREEN, PLASTIC, HTSSOP-16
文件頁(yè)數(shù)： 2/35頁(yè)
文件大小： 866K
代理商： TPS40055PWP
(
)
(
)
(
)
KFF
A
IN min
R
8
3.48
R
495 k
499 k
0.1
V
3.48
-
=
W =
W
-
(3)
(
)
(
)
f
A
SW
8
3.48
C
R
7.9
-
=
(4)
1
2
3
4
16
15
14
13
ILIM
VIN
BOOST
HDRV
KFF
RT
BP5
SYNC
TPS4005xPWP
5
6
7
8
12
11
10
9
SW
BP10
LDRV
PGND
SGND
SS
VFB
COMP
D
A
1N914, 1N4150
Type Signal Diode
PGND
R
A
499 kW
C
A
47 pF
R
KFF
71.5 kW
UDG-08102
SLUS593F – DECEMBER 2003 – REVISED SEPTEMBER 2008 ...................................................................................................................................... www.ti.com
Some applications may require an additional circuit to prevent false restarts at the UVLO voltage level. This
applies to applications which have high impedance on the input voltage line or which have excessive ringing on
the VIN line. The input voltage impedance can cause the input voltage to sag enough at start up to cause a
UVLO shutdown and subsequent restart. Excessive ringing can also affect the voltage seen by the device and
cause a UVLO shutdown and restart. A simple external circuit provides a selectable amount of hysteresis to
prevent the nuisance UVLO shutdown.
Assuming a hysteresis current of 10% IKFF, and the peak detector charges to 8 V and VIN(min) = 10 V, the value of
RA is calculated by Equation 3 using a RKFF = 71.5 k.
CA is chosen to maintain the peak voltage between switching cycles in order to keep the capacitor charge from
drooping 0.1 V (from 8 V to 7.9 V).
The value of CA may calculate to less than 10 pF, but some standard value up to 47 pF works adequately. The
diode can be a small-signal switching diode or Schottky rated for more then 20 V. Figure 6 illustrates a typical
implementation using a small switching diode.
The tolerance on the UVLO set point also affects the maximum duty cycle achievable. If the UVLO starts the
device at 10% below the nominal start-up voltage, the maximum duty cycle is reduced approximately 10% at the
nominal start up voltage.
Figure 6.
10
Copyright 2003–2008, Texas Instruments Incorporated
Product Folder Link(s): TPS40054 TPS40055 TPS40057
相關(guān)PDF資料
PDF描述
TPS3824-30DBVRG4 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDSO5
TPS2300IPWG4 2-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO20
TC151A2013EOA723 0.25 A SWITCHING REGULATOR, 50 kHz SWITCHING FREQ-MAX, PDSO8
TC151A6022EOA713 0.25 A SWITCHING REGULATOR, 50 kHz SWITCHING FREQ-MAX, PDSO8
TC151A1526EOA713 0.25 A SWITCHING REGULATOR, 50 kHz SWITCHING FREQ-MAX, PDSO8
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TPS40055PWPG4 功能描述:DC/DC 開關(guān)控制器 Wide Input Sync Buck Cntrlr source/sink RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK
TPS40055PWPR 功能描述:DC/DC 開關(guān)控制器 Wide Input Sync Buck Cntrlr source/sink RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK
TPS40055PWPRG4 功能描述:DC/DC 開關(guān)控制器 Wide Input Sync Buck Cntrlr source/sink RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK
TPS40056 制造商:TI 制造商全稱:Texas Instruments 功能描述:WIDE-INPUT SYNCHRONOUS, TRACKING BUCK CONTROLLER
TPS40056PWP 功能描述:DC/DC 開關(guān)控制器 Wide Vin Synch Buck DC/DC Cntrlr RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*