전자부품 데이터시트 검색엔진
  Korean  ▼
ALLDATASHEET.CO.KR

X  

TC2574-12.0VPA 데이터시트(PDF) 6 Page - TelCom Semiconductor, Inc

부품명 TC2574-12.0VPA
상세설명  0.5A Step-Down Switching Regulator
Download  25 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
제조업체  TELCOM [TelCom Semiconductor, Inc]
홈페이지  http://www.telcom-semi.com
Logo TELCOM - TelCom Semiconductor, Inc

TC2574-12.0VPA 데이터시트(HTML) 6 Page - TelCom Semiconductor, Inc

Back Button TC2574-12.0VPA Datasheet HTML 2Page - TelCom Semiconductor, Inc TC2574-12.0VPA Datasheet HTML 3Page - TelCom Semiconductor, Inc TC2574-12.0VPA Datasheet HTML 4Page - TelCom Semiconductor, Inc TC2574-12.0VPA Datasheet HTML 5Page - TelCom Semiconductor, Inc TC2574-12.0VPA Datasheet HTML 6Page - TelCom Semiconductor, Inc TC2574-12.0VPA Datasheet HTML 7Page - TelCom Semiconductor, Inc TC2574-12.0VPA Datasheet HTML 8Page - TelCom Semiconductor, Inc TC2574-12.0VPA Datasheet HTML 9Page - TelCom Semiconductor, Inc TC2574-12.0VPA Datasheet HTML 10Page - TelCom Semiconductor, Inc Next Button
Zoom Inzoom in Zoom Outzoom out
 6 / 25 page
background image
TC2574
6
TC2574-1 1/6/00
0.5A Step-Down Switching Regulator
PCB LAYOUT GUIIDELINES
As with any switching regulator, the layout of the printed
circuit board is very important. Rapidly switching currents
associated with wiring inductance, stray capacitance and
parasitic inductance of the printed circuit board traces can
generate voltage transients which can generate electro-
magnetic interferences (EMI) and affect the desired opera-
tion. As indicated in the Figure 2, to minimize inductance and
ground loops, the length of the leads indicated by heavy
lines should be kept as short as possible.
For best results, single–point grounding (as indicated)
or ground plane construction should be used.
On the other hand, the PCB area connected to the
Pin 7 (emitter of the internal switch) of the TC2574 should
be kept to a minimum in order to minimize coupling to
sensitive circuitry.
Another sensitive part of the circuit is the feedback. It is
important to keep the sensitive feedback wiring short. To
assure this, physically locate the programming resistors
nearto the regulator, when using the adjustable version of
the TC2574 regulator.
DESIGN PROCEDURE
Buck Converter Basics
The TC2574 is a “Buck” or Step–Down Converter which
is the most elementary forward–mode converter. Its basic
schematic can be seen in Figure 3.
The operation of this regulator topology has two distinct
time periods. The first one occurs when the series switch is
on, the input voltage is connected to the input of the inductor.
The output of the inductor is the output voltage, and the
rectifier (or catch diode) is reverse biased. During this
period, since there is a constant voltage source connected
across the inductor, the inductor current begins to linearly
ramp upwards, as described by the following equation:
IL (ON) =
(VIN – VOUT ) tON
L
During this “on” period, energy is stored within the core
material in the form of magnetic flux. If the inductor is
properly designed, there is sufficient energy stored to carry
the requirements of the load during the “off” period.
The next period is the “off” period of the power switch.
When the power switch turns off, the voltage across the
inductor reverses its polarity and is clamped at one diode
voltage drop below ground by the catch diode. Current now
flows through the catch diode thus maintaining the load
current loop. This removes the stored energy from the
inductor. The inductor current during this time is:
IL (OFF) =
(VOUT – VD ) tOFF
L
This period ends when the power switch is once again
turned on. Regulation of the converter is accomplished by
varying the duty cycle of the power switch. It is possible to
describe the duty cycle as follows:
d = tON ,where T is the period of switching.
T
For the buck converter with ideal components, the duty
cycle can also be described as:
d = VOUT
VIN
Figure 4 shows the buck converter idealized waveforms
of the catch diode voltage and the inductor current.
Figure 3. Basic Buck Converter
COUT+
RLOAD
+
VIN
D1
Power Switch
L
Figure 4. Buck Converter Idealized Waveforms
Time
VD/(FWD)
Power
Switch
Off
Power
Switch
Diode
Power
Switch
Power
Switch
Off
VON (SW)
Power
Switch
On
Power
Switch
On
Time
IMIN
Diode
ILOAD (AV)
IPK


유사한 부품 번호 - TC2574-12.0VPA

제조업체부품명데이터시트상세설명
logo
List of Unclassifed Man...
TC2571 ETC1-TC2571 Datasheet
151Kb / 3P
   1W Low-Cost Packaged PHEMT GaAs Power FETs
logo
Transcom, Inc.
TC2571 TRANSCOM-TC2571 Datasheet
196Kb / 3P
   1 W Low-Cost Packaged PHEMT GaAs Power FETs
logo
TelCom Semiconductor, I...
TC2575 TELCOM-TC2575 Datasheet
168Kb / 25P
   1.0A Step-Down Switching Regulator
TC2575-12.0VAT TELCOM-TC2575-12.0VAT Datasheet
168Kb / 25P
   1.0A Step-Down Switching Regulator
TC2575-3.3VAT TELCOM-TC2575-3.3VAT Datasheet
168Kb / 25P
   1.0A Step-Down Switching Regulator
More results

유사한 설명 - TC2574-12.0VPA

제조업체부품명데이터시트상세설명
logo
National Semiconductor ...
LM25007 NSC-LM25007 Datasheet
617Kb / 12P
   42V, 0.5A Step-Down Switching Regulator
logo
Texas Instruments
LM25007 TI1-LM25007_14 Datasheet
933Kb / 17P
[Old version datasheet]   42V, 0.5A Step-Down Switching Regulator
logo
National Semiconductor ...
LM25007 NSC-LM25007_08 Datasheet
282Kb / 12P
   42V, 0.5A Step-Down Switching Regulator
logo
Texas Instruments
LM25007MMX TI-LM25007MMX Datasheet
924Kb / 19P
[Old version datasheet]   LM25007 42V, 0.5A Step-Down Switching Regulator
LM25007 TI-LM25007_15 Datasheet
956Kb / 20P
[Old version datasheet]   LM25007 42V, 0.5A Step-Down Switching Regulator
LM25007MMX TI1-LM25007MMX Datasheet
950Kb / 19P
[Old version datasheet]   LM25007 42V, 0.5A Step-Down Switching Regulator
logo
National Semiconductor ...
LM5574 NSC-LM5574_09 Datasheet
446Kb / 22P
   SIMPLE SWITCHER 75V, 0.5A Step-Down Switching Regulator
logo
Texas Instruments
LM25574 TI1-LM25574_17 Datasheet
970Kb / 30P
[Old version datasheet]   SIMPLE SWITCHER 42V, 0.5A Step-Down Switching Regulator
LM5574 TI1-LM5574_14 Datasheet
911Kb / 28P
[Old version datasheet]   SIMPLE SWITCHER짰 75V, 0.5A Step-Down Switching Regulator
LM25574 TI1-LM25574_14 Datasheet
929Kb / 30P
[Old version datasheet]   SIMPLE SWITCHER짰 42V, 0.5A Step-Down Switching Regulator
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25


데이터시트 다운로드

Go To PDF Page


링크 URL




개인정보취급방침
ALLDATASHEET.CO.KR
ALLDATASHEET 가 귀하에 도움이 되셨나요?  [ DONATE ] 

Alldatasheet는?   |   광고문의   |   운영자에게 연락하기   |   개인정보취급방침   |   링크교환   |   제조사별 검색
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com