поискавой системы для электроныых деталей
  Russian  ▼
ALLDATASHEETRU.COM

X  

TEA1771 датащи(PDF) 5 Page - NXP Semiconductors

номер детали TEA1771
подробное описание детали  GreenChip PC primary control IC
Download  25 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
производитель  PHILIPS [NXP Semiconductors]
домашняя страница  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

TEA1771 датащи(HTML) 5 Page - NXP Semiconductors

  TEA1771 Datasheet HTML 1Page - NXP Semiconductors TEA1771 Datasheet HTML 2Page - NXP Semiconductors TEA1771 Datasheet HTML 3Page - NXP Semiconductors TEA1771 Datasheet HTML 4Page - NXP Semiconductors TEA1771 Datasheet HTML 5Page - NXP Semiconductors TEA1771 Datasheet HTML 6Page - NXP Semiconductors TEA1771 Datasheet HTML 7Page - NXP Semiconductors TEA1771 Datasheet HTML 8Page - NXP Semiconductors TEA1771 Datasheet HTML 9Page - NXP Semiconductors Next Button
Zoom Inzoom in Zoom Outzoom out
 5 / 25 page
background image
TEA1771_1
© NXP B.V. 2009. All rights reserved.
Product data sheet
Rev. 01 — 6 February 2009
5 of 25
NXP Semiconductors
TEA1771
GreenChip PC primary control IC
8.
Functional description
8.1 Introduction
The TEA1771 is designed to cooperate with the TEA1781 and the TEA1782 secondary
side controllers in a forward converter topology, see Figure 11. A typical application area
of this converter is a power supply for a desktop PC.
The topology supported by the TEA1771 enables transformer resetting using an active
reset mechanism. For this purpose a reset switch in the form of a lateral IGBT has been
integrated into the IC. This reset switch can operate high-side using an external boost
capacitor.
Advantage of this active reset mechanism is, compared to a third winding solution, that a
higher maximum duty cycle (> 50%) can be achieved. Reducing dissipation by recovering
energy is another advantage of the reset mechanism when compared to the standard
R/C/D topology.
The TEA1771 has a feed-forward control regulation, avoiding high resonant voltage peaks
as a result of output load or input voltage transients.
8.2 Supply
At power-up, the primary and secondary ICs are not yet supplied via the auxiliary
windings as the main switch M1 is off, see Figure 11. Initially, before start-up, the primary
IC is in Charge mode and supplies itself with a current Ich(LVIN) from the high voltage pin
DM2, see the SUPPLY block in Figure 1. The voltage on pin DM2 is equal to the input
voltage in this static situation. It is connected to the input via the transformer and the
parallel diode of the reset switch, Drst, see Figure 11. In Charge mode LVIN is charged
from DM2 via an internal current source, Ich(LVIN). From LVIN the nodes DECVCC and
DECPVCC are supplied by internal regulators. As a result, when LVIN is charged, the
DECVCC and DECPVCC nodes, which are decoupled by external capacitors, are
charged simultaneously. This is illustrated in the left part of Figure 3.
When the voltage at LVIN reaches its start level Vstartup(LVIN) and the voltage on pin VRST
is in its start-up window, the IC enters Running mode and starts switching; see M1 signal
in Figure 3. The voltage on pin VRST is in the start-up window when the voltage on pin
VRST is between the minimum start voltage, Vstart(VRST)(min), and the maximum start
voltage, Vstart(VRST)(max). These start-up conditions are pointed out in the
STATE DIAGRAM block in Figure 1. If the logic signal VVRSTOK is high, the voltage VVRST
is in the start-up window.
n.c
22
not connected
CB
23
boost capacitor
DM1
24
drain main switch (M1)
Table 3.
Pin description …continued
Symbol
Pin
Description


Аналогичный номер детали - TEA1771

производительномер деталидатащиподробное описание детали
logo
NXP Semiconductors
TEA1703T NXP-TEA1703T Datasheet
231Kb / 15P
   GreenChip SMPS standby control IC
Rev. 2.3-28 April 2011
TEA1703TS PHILIPS-TEA1703TS Datasheet
342Kb / 15P
   GreenChip SMPS standby control IC
Rev. 1-7 June 2012
TEA1705 NXP-TEA1705 Datasheet
116Kb / 11P
   GreenChip SMPS transient controller
Rev. 2-12 December 2013
TEA1708T PHILIPS-TEA1708T Datasheet
116Kb / 11P
   GreenChip X capacitor discharge IC
Rev. 1-25 September 2013
TEA1708T NXP-TEA1708T Datasheet
210Kb / 12P
   GreenChip X capacitor discharge IC
Rev. 1.1 ??6 April 2020
More results

Аналогичное описание - TEA1771

производительномер деталидатащиподробное описание детали
logo
NXP Semiconductors
TEA1506 PHILIPS-TEA1506 Datasheet
122Kb / 22P
   GreenChip SMPS control IC
2003 Sep 09
TEA1731TS PHILIPS-TEA1731TS Datasheet
245Kb / 19P
   GreenChip SMPS control IC
Rev. 2.1-16 August 2012
TEA1733CP NXP-TEA1733CP Datasheet
372Kb / 20P
   GreenChip SMPS control IC
Rev. 2-15 July 2013
TEA1733CT PHILIPS-TEA1733CT Datasheet
374Kb / 20P
   GreenChip SMPS control IC
Rev. 2-16 July 2013
TEA1732TS PHILIPS-TEA1732TS Datasheet
215Kb / 20P
   GreenChip SMPS control IC
Rev. 1-18 March 2014
TEA1833TS PHILIPS-TEA1833TS Datasheet
258Kb / 25P
   GreenChip SMPS control IC
Rev. 1-31 August 2015
TEA1733LT NXP-TEA1733LT Datasheet
149Kb / 21P
   GreenChip SMPS control IC
Rev. 8 ??16 July 2013
TEA1738T NXP-TEA1738T_V01 Datasheet
218Kb / 21P
   GreenChip SMPS control IC
Rev. 2-14 January 2011
TEA1833TS NXP-TEA1833TS_V01 Datasheet
335Kb / 24P
   GreenChip SMPS control IC
Rev. 1.1 - 8 February 2023
TEA18363T NXP-TEA18363T_V01 Datasheet
356Kb / 28P
   GreenChip SMPS control IC
Rev. 1 - 6 March 2023
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


датащи скачать

Go To PDF Page


ссылки URL




Конфиденциальность
ALLDATASHEETRU.COM
Вашему бизинису помогли Аллдатащит?  [ DONATE ] 

Что такое Аллдатащит   |   реклама   |   контакт   |   Конфиденциальность   |   обмен ссыками   |   поиск по производителю
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