전자부품 데이터시트 검색엔진
Selected language     Korean  ▼
부품명
         상세내용
Preview PDF Download HTML-1page HTML-10pages

TDA16846 데이터시트(Datasheet) 8 Page - Infineon Technologies AG

부품명 TDA16846
상세내용  Controller for Switch Mode Power Supplies Supporting Low Power Standby and Power Factor
PDF  29 Pages
Scroll/Zoom Zoom In 100% Zoom Out
제조사  INFINEON [Infineon Technologies AG]
홈페이지  http://www.infineon.com
Logo 

 8 page
background image
TDA 16846/16846-2
TDA 16847/16847-2
Version 2.0
8
31 Jul 2003
2
Functional Description
Start Up Behaviour (Pin 14)
When power is applied to the chip and the voltage
V
14 at Pin 14 (VCC) is less than the
upper threshold (
V
ON) of the Supply Voltage Comparator (SVC), then the input current
I
14 will be less than 100 µA. The chip is not active (off state) and driver output (Pin 13)
and control output (Pin 4) will be actively held low. When
V
14 exceeds the upper SVC
threshold (
V
ON) the chip starts working and I14 increases. When V14 falls below the lower
SVC threshold (
V
OFF) the chip starts again from its initial condition. Figure 4 shows the
start-up circuit and Figure 5 shows the voltage
V
14 during start up. Charging of C14 is
done by resistor
R
2 of the “Primary Current Simulation” (see later) and the internal diode
D1, so no additional start up resistor is needed. The capacitor
C
14 delivers the supply
current until the auxiliary winding of the transformer supplies the chip with current
through the external diode D14.
It is recommended to apply a small RF snubber capacitor of e.g. 100 nF parallel to the
electrolytic capacitor at pin 14 as shown in the application circuits in Figures 15, 16 , and
17.
To avoid multiple pulses during start up in fixed frequency mode (danger of transformer
saturation), the IC works in freerunning mode until the pulses at pin 3 (RZI) exceed the
2.5 V threshold (only TDA 16846-2, TDA 16847-2).
Figure 4
Startup Circuit




Html 페이지

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  26  27  28  29 


데이터시트




링크 URL

ALLDATASHEET 가 귀하에 도움이 되셨나요?  [ DONATE ]  

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


Mirror Sites
English : Alldatasheet.com  , 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