Matei Topciov scrie:
dodo442 scrie:
Nu am schema,e deja asamblat..E clasa D si foloseste tda8954 th
Tensiune maxima de alimentare al TDA8954 in CC este +-42.5V.
Daca transformatorul tau are 48V in CA dupa redresare si filtrare ajungem la +-68V!!! Asadar, fie explodeaza cum il alimentezi la tensiunea asta fie, intra in protectie(overvoltage)
Concluzia este ca trasformatorul nu este compatibil cu proiectul tau, ai nevoie de un transformator de 2x29V(sau macar 1x29). Un compromis ar fi sa folosesti unul de 1x24 sau 2x24V, care se gasesc uzual.
https://www.nxp.com/docs/en/data-sheet/TDA8954.pdfPresupun ca l-ai cumparat de la miva,
Kit amplificator stereo clasa D 2x210W TDA8954
169,00lei (cu TVA)
142,02lei
Mareste poza
Output power: 420W
Output type: 1 Channel Mono or 2 Channel Stereo
Available gain adjustment: 36db
Common mode rejection ratio (minimum value): 75db
Supply current: 50mA, -65mA
Maximum operating temperature: +85 degrees
Minimum operating temperature: -40 degrees
Installation style: Through Hole
Package / Case: DBS23P
Package: Tube
Audio load resistance: 8 ohms
Dual supply voltage: +/-41V
Input signal type: Differential
Basic performance parameters:
Working method: Class D
Quiescent current: 65mA
Work efficiency: 90%
Rated output power: 2*210W
Frequency response: 20Hz to 20KHz
Working voltage: AC18V to AC28V