Used Components - Philips TDA1562Q Application Note

Philips Semiconductors

5.5 Used components

Table 4: Used components
Component Value
Schottky diode BYV10-40
Cin1, Cin2 100nF
Csup1 2200µF/16V
Csup2 100nF
Cref 10µF/16V
Clift 4700µF/16V
C-emi < 100pF
These are the components which are advised for the standard TDA1562 application.
When the amplifier is mainly used for driving a subwoofer, increasing the size of the lift
capacitors is strongly advised.
<12NC>
Application note
Comment Purpose
Schottky diode To prevent that the negative
terminal of the lifter
capacitors is pulled below
substrate level when the
supply voltage drops.
MKT Input DC coupling
Electrolytic Buffer capacitor
capacitor
SMD, NPO or X7R HF decoupling of the supply Lower value: possibly oscillations in the
material
Electrolytic Decoupling of internal
capacitor reference voltage, timing for
load detection circuit.
Electrolytic Supply lift capacitors
capacitor
EMI capacitor Filter out EMI from external
sources
Rev. 01.02 — 05 May 2006
AN<nnnnn>
TDA1562Q application note
Effect when value is changed
Without Schottkys:
In stand-by: Possibly plops
In operating: Possibly "audio holes"
Lower: Low frequency rolloff will shift to
higher frequency.
Higher: Low frequency rolloff will shift to
lower frequency.
Lower value: Worse SVRR
supply
Lower value: Worse SVRR and possibly
malfunction of load detection circuit
Lower value: Less power at low frequencies
ESR influences maximum output power.
Lower value: less EMI suppression
Higher value: possible instability of the
amplifier.
When higher values than 100pF are used,
Boucherot (Zobel) filters (10Ω, 47nF) should
be placed near the outputs.
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
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