Datasheet TDA8566 (NXP) - 7
| Fabricante | NXP |
| Descripción | 2 x 40 W/2 ohm stereo BTL car radio power amplifier with differential inputs and diagnostic outputs |
| Páginas / Página | 21 / 7 — NXP Semiconductors. TDA8566. 40 W/2. stereo BTL car radio power … |
| Formato / tamaño de archivo | PDF / 132 Kb |
| Idioma del documento | Inglés |
NXP Semiconductors. TDA8566. 40 W/2. stereo BTL car radio power amplifier. Fig 5. Clip detection waveforms
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TDA8566Q
- TDA8566Q/N1,112 TDA8566Q/N1/S420,1 TDA8566Q/N2,112 TDA8566Q/N2/S438,1 TDA8566Q/N2C,112 TDA8566Q/N2S,112
- TDA8566TH/N2,112 TDA8566TH/N2,118 TDA8566TH/N2,512 TDA8566TH/N2,518 TDA8566TH/N2C,112 TDA8566TH/N2C,118 TDA8566TH/N2S,112 TDA8566TH/N2S,118
TDA8566TH1
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NXP Semiconductors TDA8566 2
×
40 W/2
Ω
stereo BTL car radio power amplifier
VO (V) 0 VCLIP (V) 0 t (s) mgu357
Fig 5. Clip detection waveforms 7.3 Short-circuit diagnostic (pin DIAG)
When a short-circuit occurs at one or more outputs to ground or to the supply voltage, the output stages are switched off until the short-circuit is removed and the device is switched on again (with a delay of approximately 20 ms after the removal of the short-circuit). During this short-circuit condition, pin DIAG is continuously LOW. When a short-circuit occurs across the load of one or both channels, the output stages are switched off for approximately 20 ms. After that time the load condition is checked during approximately 50 µs to see whether the short-circuit is still present. Due to this duty cycle of 50 µs/20 ms the average current consumption during the short-circuit condition is very low (approximately 40 mA). During this condition, pin DIAG is LOW for 20 ms and HIGH for 50 µs; see Figure 6. The power dissipation in any short-circuit condition is very low. current in output stage t (s) short-circuit over the load VDIAG 20 ms (V) t (s) 50 µs mgu360
Fig 6. Short-circuit diagnostic timing diagram 7.4 Temperature pre-warning (pin DIAG)
When the virtual junction temperature (Tvj) reaches 145 °C, pin DIAG will become continuously LOW.
7.5 Open-collector diagnostic outputs
Pins DIAG and CLIP are open-collector outputs, therefore more devices can be tied together. Pins DIAG and CLIP can also be tied together. An external pull-up resistor is required. TDA8566_6 © NXP B.V. 2007. All rights reserved.
Product data sheet Rev. 06 — 15 October 2007 7 of 21
Document Outline 1. General description 2. Features 3. Quick reference data 4. Ordering information 5. Block diagram 6. Pinning information 6.1 Pinning 6.2 Pin description 7. Functional description 7.1 Mode select switch (pinMODE) 7.2 Clip detection (pinCLIP) 7.3 Short-circuit diagnostic (pinDIAG) 7.4 Temperature pre-warning (pinDIAG) 7.5 Open-collector diagnostic outputs 7.6 Differential inputs 8. Limiting values 9. Thermal characteristics 10. Static characteristics 11. Dynamic characteristics 12. Application information 12.1 Diagnostic output 12.2 Mode select switch 13. Test information 14. Package outline 15. Soldering 15.1 Introduction to soldering 15.2 Wave and reflow soldering 15.3 Wave soldering 15.4 Reflow soldering 16. Revision history 17. Legal information 17.1 Data sheet status 17.2 Definitions 17.3 Disclaimers 17.4 Trademarks 18. Contact information 19. Contents
NXP Semiconductors TDA8566 2
×
40 W/2
Ω
stereo BTL car radio power amplifier
VO (V) 0 VCLIP (V) 0 t (s) mgu357
Fig 5. Clip detection waveforms 7.3 Short-circuit diagnostic (pin DIAG)
When a short-circuit occurs at one or more outputs to ground or to the supply voltage, the output stages are switched off until the short-circuit is removed and the device is switched on again (with a delay of approximately 20 ms after the removal of the short-circuit). During this short-circuit condition, pin DIAG is continuously LOW. When a short-circuit occurs across the load of one or both channels, the output stages are switched off for approximately 20 ms. After that time the load condition is checked during approximately 50 µs to see whether the short-circuit is still present. Due to this duty cycle of 50 µs/20 ms the average current consumption during the short-circuit condition is very low (approximately 40 mA). During this condition, pin DIAG is LOW for 20 ms and HIGH for 50 µs; see Figure 6. The power dissipation in any short-circuit condition is very low. current in output stage t (s) short-circuit over the load VDIAG 20 ms (V) t (s) 50 µs mgu360
Fig 6. Short-circuit diagnostic timing diagram 7.4 Temperature pre-warning (pin DIAG)
When the virtual junction temperature (Tvj) reaches 145 °C, pin DIAG will become continuously LOW.
7.5 Open-collector diagnostic outputs
Pins DIAG and CLIP are open-collector outputs, therefore more devices can be tied together. Pins DIAG and CLIP can also be tied together. An external pull-up resistor is required. TDA8566_6 © NXP B.V. 2007. All rights reserved.
Product data sheet Rev. 06 — 15 October 2007 7 of 21
Document Outline 1. General description 2. Features 3. Quick reference data 4. Ordering information 5. Block diagram 6. Pinning information 6.1 Pinning 6.2 Pin description 7. Functional description 7.1 Mode select switch (pinMODE) 7.2 Clip detection (pinCLIP) 7.3 Short-circuit diagnostic (pinDIAG) 7.4 Temperature pre-warning (pinDIAG) 7.5 Open-collector diagnostic outputs 7.6 Differential inputs 8. Limiting values 9. Thermal characteristics 10. Static characteristics 11. Dynamic characteristics 12. Application information 12.1 Diagnostic output 12.2 Mode select switch 13. Test information 14. Package outline 15. Soldering 15.1 Introduction to soldering 15.2 Wave and reflow soldering 15.3 Wave soldering 15.4 Reflow soldering 16. Revision history 17. Legal information 17.1 Data sheet status 17.2 Definitions 17.3 Disclaimers 17.4 Trademarks 18. Contact information 19. Contents