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Philips TDA8920B Manual

2 x 100 w class-d power amplifier
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1. General description

2. Features

3. Applications

TDA8920B
2 × 100 W class-D power amplifier
Rev. 01 — 1 October 2004
The TDA8920B is a high efficiency class-D audio power amplifier with very low
dissipation. The typical output power is 2 × 100 W.
The device is available in the HSOP24 power package and in the DBS23P through-hole
power package. The amplifier operates over a wide supply voltage range from
±12.5 V to ±30 V and consumes a very low quiescent current.
Zero dead time switching
Advanced current protection: output current limiting
Smooth start-up: no pop-noise due to DC offset
High efficiency
Operating supply voltage from ±12.5 V to ±30 V
Low quiescent current
Usable as a stereo Single-Ended (SE) amplifier or as a mono amplifier in Bridge-Tied
Load (BTL)
Fixed gain of 30 dB in Single-Ended (SE) and 36 dB in Bridge-Tied Load (BTL)
High output power
High supply voltage ripple rejection
Internal switching frequency can be overruled by an external clock
Full short-circuit proof across load and to supply lines
Thermally protected.
Television sets
Home-sound sets
Multimedia systems
All mains fed audio systems
Car audio (boosters).
Preliminary data sheet

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Summary of Contents for Philips TDA8920B

  • Page 1: General Description

    Preliminary data sheet 1. General description The TDA8920B is a high efficiency class-D audio power amplifier with very low dissipation. The typical output power is 2 × 100 W. The device is available in the HSOP24 power package and in the DBS23P through-hole power package.

  • Page 2: Quick Reference Data

    TDA8920BJ DBS23P plastic DIL-bent-SIL power package; 23 leads (straight SOT411-1 lead length 3.2 mm) 9397 750 13356 © Koninklijke Philips Electronics N.V. 2004. All rights reserved. Preliminary data sheet Rev. 01 — 1 October 2004 2 of 34...

  • Page 3: Block Diagram

    SSA1 n.c. SSP1 SSP2 Pin numbers in parenthesis refer to the TDA8920BJ. Fig 1. Block diagram. 9397 750 13356 © Koninklijke Philips Electronics N.V. 2004. All rights reserved. Preliminary data sheet Rev. 01 — 1 October 2004 3 of 34...

  • Page 4: Table Of Contents

    1 IN1M negative audio input for channel 1 positive analog supply voltage for channel 1 DDA1 9397 750 13356 © Koninklijke Philips Electronics N.V. 2004. All rights reserved. Preliminary data sheet Rev. 01 — 1 October 2004 4 of 34...

  • Page 5: Functional Description

    For protection a temperature sensor and a maximum current detector are built-in. The two audio channels of the TDA8920B contain two PWMs, two analog feedback loops and two differential input stages. It also contains circuits common to both channels such as the oscillator, all reference sources, the mode functionality and a digital timing manager.

  • Page 6: Koninklijke Philips Electronics N.v. 2004. All Rights Reserved

    + 5 V standby/ mute MODE pin mute/on SGND 001aab172 Fig 4. Example of mode selection circuit. 9397 750 13356 © Koninklijke Philips Electronics N.V. 2004. All rights reserved. Preliminary data sheet Rev. 01 — 1 October 2004 6 of 34...

  • Page 7: Koninklijke Philips Electronics N.v. 2004. All Rights Reserved

    500 ms for the transition between standby and operating. Fig 5. Timing on mode selection input. 9397 750 13356 © Koninklijke Philips Electronics N.V. 2004. All rights reserved. Preliminary data sheet Rev. 01 — 1 October 2004 7 of 34...

  • Page 8: Pulse Width Modulation Frequency

    (the amplifier is NOT shut-down completely). The amplifier can distinguish between an impedance drop of the loudspeaker and low-ohmic short across the load. In the TDA8920B this impedance threshold (Z depends on the supply voltage used. When a short is made across the load causing the impedance to drop below the threshold level (<...

  • Page 9: Koninklijke Philips Electronics N.v. 2004. All Rights Reserved

    Result will be a clipping output signal without any artefacts. See also Section 13.6 for more information on this maximum output current limiting feature. 9397 750 13356 © Koninklijke Philips Electronics N.V. 2004. All rights reserved. Preliminary data sheet Rev. 01 — 1 October 2004 9 of 34...

  • Page 10: Window Protection (Wp)

    Restart every 100 ms Hysteresis of 20 degrees will influence restart timing depending on heatsink size. 9397 750 13356 © Koninklijke Philips Electronics N.V. 2004. All rights reserved. Preliminary data sheet Rev. 01 — 1 October 2004 10 of 34...

  • Page 11: Differential Audio Inputs

    +150 −40 °C ambient temperature °C junction temperature Current limiting concept. See also Section 13.6. 9397 750 13356 © Koninklijke Philips Electronics N.V. 2004. All rights reserved. Preliminary data sheet Rev. 01 — 1 October 2004 11 of 34...

  • Page 12: Thermal Characteristics

    Stabilizer output; pin STABI stabilizer output voltage mute and operating; 12.5 o(stab) with respect to V SSP1 9397 750 13356 © Koninklijke Philips Electronics N.V. 2004. All rights reserved. Preliminary data sheet Rev. 01 — 1 October 2004 12 of 34...

  • Page 13: Dynamic Characteristics

    OSC SGND + 2.5 OSC(trip) frequency range for tracking track 9397 750 13356 © Koninklijke Philips Electronics N.V. 2004. All rights reserved. Preliminary data sheet Rev. 01 — 1 October 2004 13 of 34...

  • Page 14: Stereo And Dual Se Application

    = 1 W; R = 1 kHz. = 1 V (RMS); f = 1 kHz. i(max) 9397 750 13356 © Koninklijke Philips Electronics N.V. 2004. All rights reserved. Preliminary data sheet Rev. 01 — 1 October 2004 14 of 34...

  • Page 15: Mono Btl Application

    6). In principle the loudspeaker can be connected between the outputs of the two single-ended demodulation filters. 9397 750 13356 © Koninklijke Philips Electronics N.V. 2004. All rights reserved. Preliminary data sheet Rev. 01 — 1 October 2004 15 of 34...

  • Page 16: Mode Pin

    When using an external clock the following accuracy of the duty cycle of the external clock has to be taken into account: 47.5 % < δ < 52.5 %. 9397 750 13356 © Koninklijke Philips Electronics N.V. 2004. All rights reserved. Preliminary data sheet Rev. 01 — 1 October 2004...

  • Page 17: Heatsink Requirements

    ----------------------------------- - th j a – diss is determined by the efficiency (η) of the TDA8920B. The efficiency measured in the diss TDA8920B as a function of output power is given in Figure 21.The power dissipation can be derived as function of output power (see Figure 20).

  • Page 18: Output Current Limiting

    8 A (e.g. in case of a short-circuit to the supply lines or a short-circuit across the load) the maximum output current of the amplifier will be regulated to 8 A. The TDA8920B amplifier can distinguish between a low-ohmic short circuit condition and other overcurrent conditions like dynamic impedance drops of the used loudspeakers. The impedance threshold (Z ) depends on the supply voltage used.

  • Page 19: Pumping Effects

    If the overcurrent condition is removed the amplifier will remain in Operating mode once restarted. In this way the TDA8920B amplifier is fully robust against short circuit conditions while at the same time so-called audio holes as a result of loudspeaker impedance drops are eliminated.

  • Page 20: Application Schematic

    Minimum total required capacity per power supply line is 3300 µF. • 9397 750 13356 © Koninklijke Philips Electronics N.V. 2004. All rights reserved. Preliminary data sheet Rev. 01 — 1 October 2004 20 of 34...
  • Page 21 xxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx x xxxxxxxxxxxxxx xxxxxxxxxx xxx xxxxxx xxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxx xxxxx xxxxxx xx xxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxx xxxxxxx xxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxx xxxxxxxxxxxxxx xxxxxx xx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxxxx xxxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxx xxxxx x x 10 Ω L1 BEAD 5.6 kΩ CON1 +25 V 5.6 kΩ 47 µF/35 V 470 µF/35 V 100 nF...

  • Page 22: Curves Measured In Reference Design

    Fig 13. (THD + N)/S as a function of output power; BTL configuration with 1 × 6 Ω load. configuration with 1 × 8 Ω load. 9397 750 13356 © Koninklijke Philips Electronics N.V. 2004. All rights reserved. Preliminary data sheet Rev. 01 — 1 October 2004 22 of 34...

  • Page 23: Koninklijke Philips Electronics N.v. 2004. All Rights Reserved

    Fig 17. (THD + N)/S as a function of frequency; BTL configuration with 1 × 6 Ω load. configuration with 1 × 8 Ω load. 9397 750 13356 © Koninklijke Philips Electronics N.V. 2004. All rights reserved. Preliminary data sheet Rev. 01 — 1 October 2004 23 of 34...

  • Page 24: Koninklijke Philips Electronics N.v. 2004. All Rights Reserved

    Fig 20. Power dissipation as a function of total output Fig 21. Efficiency as a function of total output power. power. 9397 750 13356 © Koninklijke Philips Electronics N.V. 2004. All rights reserved. Preliminary data sheet Rev. 01 — 1 October 2004 24 of 34...

  • Page 25: Koninklijke Philips Electronics N.v. 2004. All Rights Reserved

    Fig 25. Gain as a function of frequency; R and C = 330 pF. = 330 pF. 9397 750 13356 © Koninklijke Philips Electronics N.V. 2004. All rights reserved. Preliminary data sheet Rev. 01 — 1 October 2004 25 of 34...

  • Page 26: Test Information

    14. Test information 14.1 Quality information The General Quality Specification for Integrated Circuits, SNW-FQ-611 is applicable. 9397 750 13356 © Koninklijke Philips Electronics N.V. 2004. All rights reserved. Preliminary data sheet Rev. 01 — 1 October 2004 26 of 34...

  • Page 27: Package Outline

    OUTLINE EUROPEAN ISSUE DATE VERSION PROJECTION JEDEC JEITA 03-02-18 SOT566-3 03-07-23 Fig 29. HSOP24 package outline. 9397 750 13356 © Koninklijke Philips Electronics N.V. 2004. All rights reserved. Preliminary data sheet Rev. 01 — 1 October 2004 27 of 34...

  • Page 28: Rev. 01 — 1 October

    OUTLINE EUROPEAN ISSUE DATE VERSION PROJECTION JEDEC JEITA 98-02-20 SOT411-1 02-04-24 Fig 30. DBS23P package outline. 9397 750 13356 © Koninklijke Philips Electronics N.V. 2004. All rights reserved. Preliminary data sheet Rev. 01 — 1 October 2004 28 of 34...

  • Page 29: Soldering

    225 °C (SnPb process) or below 245 °C (Pb-free process) • – for all BGA, HTSSON..T and SSOP..T packages 9397 750 13356 © Koninklijke Philips Electronics N.V. 2004. All rights reserved. Preliminary data sheet Rev. 01 — 1 October 2004 29 of 34...

  • Page 30: Wave Soldering

    When using a dedicated tool, all other leads can be soldered in one operation within 2 seconds to 5 seconds between 270 °C and 320 °C. 9397 750 13356 © Koninklijke Philips Electronics N.V. 2004. All rights reserved. Preliminary data sheet Rev. 01 — 1 October 2004...

  • Page 31: Package Related Soldering Information

    For more detailed information on the BGA packages refer to the (LF)BGA Application Note (AN01026); order a copy from your Philips Semiconductors sales office. All surface mount (SMD) packages are moisture sensitive. Depending upon the moisture content, the maximum temperature (with respect to time) and body size of the package, there is a risk that internal or external package cracks may occur due to vaporization of the moisture in them (the so called popcorn effect).

  • Page 32: Revision History

    Data sheet status Change notice Order number Supersedes TDA8920B_1 20041001 Preliminary data sheet 9397 750 13356 9397 750 13356 © Koninklijke Philips Electronics N.V. 2004. All rights reserved. Preliminary data sheet Rev. 01 — 1 October 2004 32 of 34...

  • Page 33: Data Sheet Status

    This data sheet contains data from the preliminary specification. Supplementary data will be published at a later date. Philips Semiconductors reserves the right to change the specification without notice, in order to improve the design and supply the best possible product.
  • Page 34 Reflow soldering ..... . . 29 © Koninklijke Philips Electronics N.V. 2004 All rights are reserved. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner.

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