JBL MS-8, Руководство по обслуживанию

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December 2007 Rev 2 1/33
1
TDA7563B
4 x 50W multifunction quad power amplifier
with built-in diagnostics feature
Features
■ Multipower BCD technology
■ MOSFET output power stage
■ DMOS power output
■ New Hi-efficiency (class SB)
■ High output power capability 4x28W/4
Ω
@
14.4V, 1KHZ, 10% THD, 4x50W max, power
■ Max. output power 4x72W/2
Ω
■ Full I
2
C bus driving:
– St-by
– Independent front/rear soft play/mute
– Selectable gain 30dB /16dB (for low noise
line output function)
– High efficiency enable/disable
– I
2
C bus digital diagnostics (including DC
bus AC load detection)
■ Full fault protection
■ DC offset detection
■ Four independent short circuit protection
■ Clipping detector pin with selectable threshold
(2%/10%)
■ St-by/mute pin
■ Linear thermal shutdown with multiple thermal
warning
■ ESD protection
Description
The TDA7563B is a new BCD technology quad
bridge type of car radio amplifier in Flexiwatt27
package specially intended for car radio
applications.
Thanks to the DMOS output stage the TDA7563B
has a very low distortion allowing a clear powerful
sound. Among the features, its superior efficiency
performance coming from the internal exclusive
structure, makes it the most suitable device to
simplify the thermal management in high power
sets.
The dissipated output power under average
listening condition is in fact reduced up to 50%
when compared to the level provided by
conventional class AB solutions.
This device is equipped with a full diagnostics
array that communicates the status of each
speaker through the I
2
C bus.
Flexiwatt27 PowerSO36 Flexiwatt27
(Horizontal)
(Vertical)
Table 1. Device summary
Order code Package Packing
TDA7563B Flexiwatt27 (vertical) Tube
TDA7563BH Flexiwatt27 (horizontal) Tube
TDA7563BPD PowerSO36 Tube
TDA7563BPDTR PowerSO36 Tape and reel
www.st.com
MS-8
65