 |
Os motores de busca de Datasheet de Componentes eletrônicos |
|
|
Os motores de busca de Datasheet de Componentes eletrônicos |
|
TDA8922C Folha de dados(PDF) 11 Page - NXP Semiconductors |
|
||||||||||||||||||||||||||||||
TDA8922C Folha de dados(HTML) 11 Page - NXP Semiconductors |
|
|
11 / 40 page  TDA8922C_1 © NXP B.V. 2009. All rights reserved. Product data sheet Rev. 01 — 7 September 2009 11 of 40 NXP Semiconductors TDA8922C 2 × 75 W class-D power amplifier Start-up will be interrupted If a short-circuit is detected between one of the output terminals and pin VDDP1/VDDP2 or VSSP1/VSSP2. The TDA8922C will wait until the short-circuit to the supply lines has been removed before resuming start-up. The short circuit will not generate large currents because the short-circuit check is carried out before the power stages are enabled. • When the amplifier is shut down completely because the OCP circuit has detected a short circuit to one of the supply lines. WP will be activated when the amplifier attempts to restart after 100 ms (see Section 8.3.2). The amplifier will not start-up again until the short circuit to the supply lines has been removed. 8.3.4 Supply voltage protection If the supply voltage drops below the minimum supply voltage threshold, Vth(uvp), the UVP circuit will be activated and the system will shut down. Once the supply voltage rises above Vth(uvp) again, the system will restart after a delay of 100 ms. If the supply voltage exceeds the maximum supply voltage threshold, Vth(ovp), the OVP circuit will be activated and the power stages will be shut down. When the supply voltage drops below Vth(ovp) again, the system will restart after a delay of 100 ms. An additional UnBalance Protection (UBP) circuit compares the positive analog supply voltage (on pin VDDA) with the negative analog supply voltage (on pin VSSA) and is triggered if the voltage difference exceeds a factor of two (VDDA > 2 ×|VSSA| OR |VSSA| > 2 × V DDA). When the supply voltage difference drops below the unbalance threshold, Vth(ubp), the system restarts after 100 ms. An overview of all protection circuits and their respective effects on the output signal is provided in Table 5. [1] Amplifier gain depends on the junction temperature and heatsink size. [2] The amplifier shuts down completely only if the short-circuit impedance is below the impedance threshold (Zth; see Section 8.3.2). In all other cases, current limiting results in a clipped output signal. [3] Fault condition detected during any Standby-to-Mute transition or during a restart after OCP has been activated (short-circuit to one of the supply lines). 8.4 Differential audio inputs The audio inputs are fully differential ensuring a high common mode rejection ratio and maximum flexibility in the application. Table 5. Overview of TDA8922C protection circuits Protection name Complete shutdown Restart directly Restart after 100 ms Pin PROT detection TFB[1] NNNN OTP Y N Y N OCP Y[2] N[2] Y[2] Y WP N[3] YN N UVP YN YN OVP Y N Y N UBP YN YN |
Nº de peça semelhante - TDA8922C_15 |
|
Descrição semelhante - TDA8922C_15 |
|
|
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 |
| 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 |
Portuguese ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
