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

X  

TDA8950J Folha de dados(PDF) 8 Page - NXP Semiconductors

Nome de Peças TDA8950J
Descrição Electrónicos  2 쨈 150 W class-D power amplifier
Download  39 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Fabricante Electrônico  PHILIPS [NXP Semiconductors]
Página de início  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

TDA8950J Folha de dados(HTML) 8 Page - NXP Semiconductors

Back Button TDA8950J Datasheet HTML 4Page - NXP Semiconductors TDA8950J Datasheet HTML 5Page - NXP Semiconductors TDA8950J Datasheet HTML 6Page - NXP Semiconductors TDA8950J Datasheet HTML 7Page - NXP Semiconductors TDA8950J Datasheet HTML 8Page - NXP Semiconductors TDA8950J Datasheet HTML 9Page - NXP Semiconductors TDA8950J Datasheet HTML 10Page - NXP Semiconductors TDA8950J Datasheet HTML 11Page - NXP Semiconductors TDA8950J Datasheet HTML 12Page - NXP Semiconductors Next Button
Zoom Inzoom in Zoom Outzoom out
 8 / 39 page
background image
TDA8950_2
© NXP B.V. 2009. All rights reserved.
Product data sheet
Rev. 02 — 11 June 2009
8 of 39
NXP Semiconductors
TDA8950
2
× 150 W class-D power amplifier
8.2 Pulse-width modulation frequency
The amplifier output signal is a PWM signal with a typical carrier frequency of between
250 kHz and 450 kHz. A 2nd-order LC demodulation filter on the output is used to convert
the PWM signal into an analog audio signal. The carrier frequency is determined by an
external resistor, ROSC, connected between pins OSC and VSSA. The optimal carrier
frequency setting is between 250 kHz and 450 kHz.
The carrier frequency is set to 345 kHz by connecting an external 30 k
Ω resistor between
pins OSC and VSSA. See Table 9 for more details.
If two or more Class D amplifiers are used in the same audio application, it is
recommended that an external clock circuit be used with all devices (see Section 13.4).
This will ensure that they operate at the same switching frequency, thus avoiding beat
tones (if the switching frequencies are different, audible interference known as ‘beat tones’
can be generated)
8.3 Protection
The following protection circuits are incorporated into the TDA8950:
Thermal protection:
– Thermal FoldBack (TFB)
– OverTemperature Protection (OTP)
OverCurrent Protection (OCP)
Window Protection (WP)
Supply voltage protection:
– UnderVoltage Protection (UVP)
– OverVoltage Protection (OVP)
– UnBalance Protection (UBP)
How the device reacts to a fault conditions depends on which protection circuit has been
activated.
8.3.1 Thermal protection
The TDA8950 employes an advanced thermal protection strategy. A TFB function
gradually reduces the output power within a defined temperature range. If the temperature
continues to rise, OTP is activated to shut down the device completely.
8.3.1.1
Thermal FoldBack (TFB)
If the junction temperature (Tj) exceeds the thermal foldback activation threshold, the gain
is gradually reduced. This reduces the output signal amplitude and the power dissipation,
eventually stabilizing the temperature.
TFB is specified at the thermal foldback activation temperature Tact(th_fold) where the
closed-loop voltage gain is reduced by 6 dB. The TFB range is:
Tact(th_fold) − 5 °C < Tact(th_fold) < Tact(th_prot)
The value of Tact(th_fold) for the TDA8950 is approximately 153 °C; see Table 8 for more
details.


Nº de peça semelhante - TDA8950J

Fabricante ElectrônicoNome de PeçasFolha de dadosDescrição Electrónicos
logo
NXP Semiconductors
TDA8950J NXP-TDA8950J Datasheet
271Kb / 39P
   2 X 150 W class-D power amplifier
Rev. 01-9 September 2008
More results

Descrição semelhante - TDA8950J

Fabricante ElectrônicoNome de PeçasFolha de dadosDescrição Electrónicos
logo
NXP Semiconductors
TDA8920C NXP-TDA8920C_09 Datasheet
242Kb / 39P
   2 쨈 110 W class-D power amplifier
Rev. 02-11 June 2009
TDA8950 NXP-TDA8950 Datasheet
271Kb / 39P
   2 X 150 W class-D power amplifier
Rev. 01-9 September 2008
TDA8950 PHILIPS-TDA8950_15 Datasheet
242Kb / 39P
   2 X 150 W class-D power amplifier
Rev. 02-11 June 2009
TFA9800J NXP-TFA9800J Datasheet
136Kb / 17P
   2 쨈 7 W stereo power amplifier
Rev. 01-17 March 2006
TDA8920C NXP-TDA8920C Datasheet
275Kb / 40P
   2 X110 W class-D power amplifier
Rev. 01-29 September 2008
logo
Texas Instruments
TPA005D12 TI-TPA005D12 Datasheet
119Kb / 8P
[Old version datasheet]   2-W STEREO CLASS-D AUDIO POWER AMPLIFIER
logo
NXP Semiconductors
TDA8922C NXP-TDA8922C Datasheet
239Kb / 40P
   2 X 75 W class-D power amplifier
Rev. 01-7 September 2009
TDA8920C PHILIPS-TDA8920C_15 Datasheet
242Kb / 39P
   2 X 110 W class-D power amplifier
Rev. 02-11 June 2009
TDA8922B PHILIPS-TDA8922B Datasheet
201Kb / 32P
   2 X 50 W class-D power amplifier
Rev. 01-1 October 2004
logo
Texas Instruments
TPA005D02 TI-TPA005D02 Datasheet
381Kb / 25P
[Old version datasheet]   2-W STEREO CLASS-D AUDIO POWER AMPLIFIER
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 26 27 28 29 30 31 32 33 34 35 36 37 38 39


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