Os motores de busca de Datasheet de Componentes eletrônicos
  Portuguese  ▼
ALLDATASHEETPT.COM

X  

TEA1520P Folha de dados(PDF) 5 Page - NXP Semiconductors

Nome de Peças TEA1520P
Descrição Electrónicos  SMPS ICs for low-power systems Rev. 04 ??14 September 2010
Download  20 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Fabricante Electrônico  PHILIPS [NXP Semiconductors]
Página de início  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

TEA1520P Folha de dados(HTML) 5 Page - NXP Semiconductors

  TEA1520P Datasheet HTML 1Page - NXP Semiconductors TEA1520P Datasheet HTML 2Page - NXP Semiconductors TEA1520P Datasheet HTML 3Page - NXP Semiconductors TEA1520P Datasheet HTML 4Page - NXP Semiconductors TEA1520P Datasheet HTML 5Page - NXP Semiconductors TEA1520P Datasheet HTML 6Page - NXP Semiconductors TEA1520P Datasheet HTML 7Page - NXP Semiconductors TEA1520P Datasheet HTML 8Page - NXP Semiconductors TEA1520P Datasheet HTML 9Page - NXP Semiconductors Next Button
Zoom Inzoom in Zoom Outzoom out
 5 / 20 page
background image
TEA152X
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2010. All rights reserved.
Product data sheet
Rev. 04 — 14 September 2010
5 of 20
NXP Semiconductors
TEA152x
SMPS ICs for low-power systems
components RRC and CRC. This mode is called Pulse Width Modulation (PWM).
Furthermore, a primary stroke is started only in a valley of the secondary ringing. This
valley switching principle minimizes capacitive switch-on losses.
8.1 Start-up and Underoltage lockout
Initially, the IC is self supplying from the rectified mains voltage. The IC starts switching as
soon as the voltage on pin VCC passes the VCC(startup) level. The supply is taken over by
the auxiliary winding of the transformer as soon as VCC is high enough and the supply
from the line is stopped for high efficiency operation.
When for some reason the auxiliary supply is not sufficient, the high-voltage supply also
supplies the IC. As soon as the voltage on pin VCC drops below the VCC(stop) level, the IC
stops switching and restarts from the rectified mains voltage.
8.2 Oscillator
The frequency of the oscillator is set by the external resistor and capacitor on pin RC. The
external capacitor is charged rapidly to the VRC(max) level and, starting from a new primary
stroke, it discharges to the VRC(min) level. Because the discharge is exponential, the
relative sensitivity of the duty factor to the regulation voltage at low duty factor is almost
equal to the sensitivity at high duty factors. This results in a more constant gain over the
duty factor range compared to PWM systems with a linear sawtooth oscillator. Stable
operation at low duty factors is easily realized. For high efficiency, the frequency is
reduced as soon as the duty factor drops below a certain value. This is accomplished by
increasing the oscillator charge time.
To ensure that the capacitor can be charged within the charge time, the value of the
oscillator capacitor should be limited to approximately 1 nF.
8.3 Duty factor control
The duty factor is controlled by the internal regulation voltage and the oscillator signal on
pin RC. The internal regulation voltage is equal to the external regulation voltage (
−2.5 V)
multiplied by the gain of the error amplifier (typically 20 dB which is 10
×).
8.4 Valley switching
A new cycle is started when the primary switch is switched on (see Figure 4). After a
certain time (determined by the oscillator voltage RC and the internal regulation level), the
switch is turned off and the secondary stroke starts. The internal regulation level is
determined by the voltage on pin REG.
After the secondary stroke, the drain voltage shows an oscillation with a frequency of
approximately:
(1)
where:
Lp = primary self-inductance
Cp = parasitic capacitance on drain node
1
2
π
×
L
p
C
p
×
()
×
----------------------------------------------


Nº de peça semelhante - TEA1520P

Fabricante ElectrônicoNome de PeçasFolha de dadosDescrição Electrónicos
logo
NXP Semiconductors
TEA1520P NXP-TEA1520P Datasheet
103Kb / 17P
   SMPS ICs for low-power systems
Rev. 03-23 March 2009
TEA1520P NXP-TEA1520P Datasheet
462Kb / 20P
   SMPS ICs for low-power systems
Rev. 04-14 September 2010
TEA1520P PHILIPS-TEA1520P Datasheet
149Kb / 20P
   STARplugTM
2000 Sep 08
TEA1520P/N2 NXP-TEA1520P/N2 Datasheet
614Kb / 2P
   Cut costs and size for effi cient low-power supplies
2007
More results

Descrição semelhante - TEA1520P

Fabricante ElectrônicoNome de PeçasFolha de dadosDescrição Electrónicos
logo
NXP Semiconductors
TEA152X NXP-TEA152X_10 Datasheet
462Kb / 20P
   SMPS ICs for low-power systems
Rev. 04-14 September 2010
TEA152X NXP-TEA152X Datasheet
103Kb / 17P
   SMPS ICs for low-power systems
Rev. 03-23 March 2009
TEA152X PHILIPS-TEA152X Datasheet
95Kb / 17P
   SMPS ICs for low-power systems
Rev. 03-23 March 2009
SSL1623PH NXP-SSL1623PH Datasheet
85Kb / 15P
   SMPS ICs for mains LED drivers
Rev. 01-15 September 2008
SSL152X NXP-SSL152X_09 Datasheet
103Kb / 17P
   SMPS ICs for mains LED drivers
Rev. 02-10 March 2009
PMBFJ112-215 NXP-PMBFJ112-215 Datasheet
87Kb / 9P
   N-channel junction FETs Rev. 4 ??20 September 2011
Rev. 4-20 September 2011
SSL152X NXP-SSL152X Datasheet
94Kb / 17P
   SMPS ICs for mains LED drivers
Rev. 01-15 September 2008
logo
Texas Instruments
TPS650241-Q1 TI-TPS650241-Q1 Datasheet
865Kb / 32P
[Old version datasheet]   POWER MANAGEMENT ICs FOR Li-ION POWERED SYSTEMS
TPS650240 TI-TPS650240 Datasheet
955Kb / 34P
[Old version datasheet]   Power Management ICs for Li-Ion Powered Systems
TPS650240 TI-TPS650240_08 Datasheet
1Mb / 33P
[Old version datasheet]   Power Management ICs for Li-Ion Powered Systems
More results


Html Pages

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


Folha de dados Download

Go To PDF Page


Ligação URL




Privacy Policy
ALLDATASHEETPT.COM
ALLDATASHEET é útil para você?  [ DONATE ] 

Sobre Alldatasheet   |   Publicidade   |   Contato conosco   |   Privacy Policy   |   roca de Link   |   Lista de Fabricantes
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