 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
TDA8931T Datasheet(PDF) 18 Page - NXP Semiconductors |
|
||||||||||||||||||||||||||||||
TDA8931T Datasheet(HTML) 18 Page - NXP Semiconductors |
|
|
18 / 31 page  9397 750 13847 © Koninklijke Philips Electronics N.V. 2005. All rights reserved. Preliminary data sheet Rev. 01 — 14 January 2004 18 of 31 Philips Semiconductors TDA8931 Power comparator 1 × 20 W 14.2 Output current limiting The output current is limited by the OCP with a threshold level of 3.3 A (minimum). During normal operation the output current should not exceed this threshold level, otherwise the output signal is distorted. The peak output current should stay below 3.3 A and can be estimated using the following equation: (4) Where: IO = output current in the load in VP = supply voltage (VDDP − VSSP) RDSon = on-resistance power switch RL = load impedance Rcoil = series resistance output coil RESR = ESR of the single-ended capacitor Example: With a 4 Ω load the OCP will be triggered below a supply voltage of 28 V. This will result in an absolute maximum output power of Po = 26 W at THD = 10 %. 14.3 Low pass filter considerations For a flat frequency response (second order Butterworth filter) it is necessary to change the LC-filter components (L1 and C14) according to the speaker impedance. Table 12 shows the required components values in case of a 4 W, 6 W or 8 W speaker impedance. 14.4 Thermal behavior (printed-circuit board considerations) The SO20 package of the TDA8931T has special thermal corner leads, significantly increasing the power capability (reducing Rth). The corner leads (pins 1, 10, 11 and 20) should be attached to a copper area (VSS) on the PCB for cooling. The typical thermal resistance Rth(j-a) of the TDA8931T is 24 K/W (free air and natural convection) when soldered on a double sided FR4 PCB with 35 µm copper layer and cooling area of approximately of 28 cm2. I O V P 2R DSon R L R coil R ESR ++ + () × ------------------------------------------------------------------------------- 3.3 ≤≤ Table 12: Filter components values Speaker impedance ( Ω) L1 value ( µH) C14 value (nF) 4 22 680 6 33 470 8 47 330 |
Similar Part No. - TDA8931T |
|
Similar Description - TDA8931T |
|
|
Link URL |
| Privacy Policy |
| ALLDATASHEET.COM |
| Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Datasheet Upload | Contact us | Privacy Policy | Link Exchange | Manufacturer List 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 |
English ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
