Philips TDA1562Q - Page 51

Philips Semiconductors
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TDA1562Q application note
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©
Koninklijke Philips Electronics N.V.
2004
. All rights reserved.
Application note Rev. 01.02 — 05 May 2006 51 of 62
Fig 39. Protection against negative pulses by Schottky diode
The schottky diode will conduct most of the current, thus protecting the parasitic diode.
Fig.40 shows the current distribution between the schottky diode and the parasitic diode.
The yellow trace shows the current through the parasitic diode at 5A/division and the
magenta trace shows the current through the schottky diode at 10A/division.
Schottky
ROHM RSX301L
Parasitic
Clift?
Vsupply
Pgnd
SPEAKER
Iparasitic
ISchottky