Moteur de recherche de fiches techniques de composants électroniques
  French  ▼
ALLDATASHEET.FR

X  

TDA8933 Fiches technique(PDF) 10 Page - NXP Semiconductors

No de pièce TDA8933
Description  Class-D audio amplifier
Download  47 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Fabricant  NXP [NXP Semiconductors]
Site Internet  http://www.nxp.com
Logo NXP - NXP Semiconductors

TDA8933 Fiches technique(HTML) 10 Page - NXP Semiconductors

Back Button TDA8933 Datasheet HTML 6Page - NXP Semiconductors TDA8933 Datasheet HTML 7Page - NXP Semiconductors TDA8933 Datasheet HTML 8Page - NXP Semiconductors TDA8933 Datasheet HTML 9Page - NXP Semiconductors TDA8933 Datasheet HTML 10Page - NXP Semiconductors TDA8933 Datasheet HTML 11Page - NXP Semiconductors TDA8933 Datasheet HTML 12Page - NXP Semiconductors TDA8933 Datasheet HTML 13Page - NXP Semiconductors TDA8933 Datasheet HTML 14Page - NXP Semiconductors Next Button
Zoom Inzoom in Zoom Outzoom out
 10 / 47 page
background image
TDA8933_1
© NXP B.V. 2007. All rights reserved.
Preliminary data sheet
Rev. 01 — 15 May 2007
10 of 47
NXP Semiconductors
TDA8933
Class-D audio amplifier
8.4.1 Thermal Foldback (TF)
If the junction temperature of the TDA8933 exceeds the threshold level (Tj > 140 °C), the
gain of the amplifier is decreased gradually to a level where the combination of
dissipation (P) and the thermal resistance from junction to ambient (Rth(j-a)) results in a
junction temperature around the threshold level.
This means that the device will not switch off completely, but remains operational at lower
output power levels. With music output signals, this feature enables high peak output
powers while still operating without any external heat sink other than the printed-circuit
board area.
If the junction temperature still increases due to external causes, the OverTemperature
Protection (OTP) shuts down the amplifier completely.
8.4.2 OverTemperature Protection (OTP)
If the junction temperature Tj > 155 °C, the power stage will shut down immediately.
8.4.3 OverCurrent Protection (OCP)
When the output current of the device exceeds 2 A due to a short-circuit across the load
or an impedance drop, the cycle-by-cycle current limitation becomes active. This means
the device will not switch off, but continue to operate while limiting the current without
causing audio holes (interruptions). The maximum output current will not go beyond the
absolute maximum current.
If the current exceeds 2 A due to a low ohmic short from the demodulated output (after the
inductor) to either VSS or VDD both power stages become floating. The DIAG is set low for
50 ms and the internal timer of 100 ms is started. The timer will keep both power stages
disabled for 100 ms. As long as the short remains, this cycle will repeat. The average
power dissipation in the TDA8933 will be low because the short-circuit current will flow
only during a very small part of the timer cycle of 100 ms.
8.4.4 Window Protection (WP)
WP checks the PWM output voltage before switching from Sleep mode to Mute mode
(outputs switching) and is activated:
During the start-up sequence, when pin POWERUP is switched from Sleep mode to
Mute mode.
In the event of a short-circuit at one of the output terminals to VDDP1,VSSP1,VDDP2 or
VSSP2 the start-up procedure is interrupted and the TDA8933 waits for open-circuit
outputs. Because the check is done before enabling the power stages, no large
currents will flow in the event of a short-circuit.
When the amplifier is shut down completely, due to activation of the OCP because a
short to one of the supply lines is made, then during restart (after 100 ms) the window
protection will be activated. As a result, the amplifier will not start up until the short to
the supply lines is removed.
8.4.5 Supply voltage protections
If the supply voltage drops below 10 V, the UVP circuit is activated and the system will
shut down directly. This switch-off will be silent and without pop noise. When the supply
voltage rises above the threshold level, the system is restarted again after 100 ms.


Numéro de pièce similaire - TDA8933

FabricantNo de pièceFiches techniqueDescription
logo
NXP Semiconductors
TDA8933B NXP-TDA8933B Datasheet
244Kb / 42P
   Class D audio amplifier
Rev. 01-23 October 2008
TDA8933BTW NXP-TDA8933BTW Datasheet
244Kb / 42P
   Class D audio amplifier
Rev. 01-23 October 2008
More results

Description similaire - TDA8933

FabricantNo de pièceFiches techniqueDescription
logo
NXP Semiconductors
TDA8933B NXP-TDA8933B Datasheet
244Kb / 42P
   Class D audio amplifier
Rev. 01-23 October 2008
TDA8932B NXP-TDA8932B Datasheet
319Kb / 48P
   Class-D audio amplifier
Rev. 04-18 December 2008
logo
International Rectifier
IRAUDPS3 IRF-IRAUDPS3_15 Datasheet
1Mb / 20P
   Class-D Audio Amplifier
logo
NXP Semiconductors
TDA8932B PHILIPS-TDA8932B_15 Datasheet
319Kb / 48P
   Class-D audio amplifier
Rev. 04-18 December 2008
TDA8932 NXP-TDA8932 Datasheet
246Kb / 45P
   Class-D audio amplifier
Rev.02-12 December 2006
logo
AiT Semiconductor Inc.
A2323 AITSEMI-A2323 Datasheet
1Mb / 18P
   AUDIO AMPLIFIER 2.65W CLASS-D AUDIO POWER AMPLIFIER
REV3.0
logo
Analog Devices
AD1990 AD-AD1990 Datasheet
389Kb / 16P
   Class-D Audio Power Amplifier
Rev. PrA ??1/20/05
logo
Sanyo Semicon Device
LV49152V SANYO-LV49152V Datasheet
258Kb / 24P
   Class-D Audio Power Amplifier
logo
Texas Instruments
TPA2028D1 TI1-TPA2028D1 Datasheet
2Mb / 43P
[Old version datasheet]   Mono Class-D Audio Amplifier
logo
Analog Devices
ADAU1592 AD-ADAU1592 Datasheet
540Kb / 24P
   Class-D Audio Power Amplifier
REV. 0
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 40 41 42 43 44 45 46 47


Fiches technique Télécharger

Go To PDF Page


Lien URL




Politique de confidentialité
ALLDATASHEET.FR
ALLDATASHEET vous a-t-il été utile ?  [ DONATE ] 

À propos de Alldatasheet   |   Publicité   |   Contactez-nous   |   Politique de confidentialité   |   Echange de liens   |   Fabricants
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