LC-32LE340/343
LC-40LE340/343
10
d. Pin Functions
C. SUBWOOFER AMPLIFIER STAGE (TPA3112)
a. General Description
The TPA3112D1 is a 25-W efficient, Class-D audio power amplifier for driving a bridge tied
speaker. Advanced EMI Suppression Technology enables the use of inexpensive ferrite bead
filters at the outputs while meeting EMC requirements. SpeakerGuard speaker protection
system includes an adjustable power limiter and a DC detection circuit. The adjustable power
limiter allows the user to set a "virtual" voltage rail lower than the chip supply to limit the
amount of current through the speaker. The DC detect circuit measures the frequency and
amplitude of the PWM signal and shuts off the output stage if the input capacitors are
damaged or shorts exist on the inputs. The TPA3112D1 can drive a mono speaker as low as
4
7KHKLJKHIILFLHQF\RIWKH73$'!
eliminates the need for an external heat
sink when playing music. The outputs are fully protected against shorts to GND, VCC, and
output-to-output. The short-circuit protection and thermal protection includes an auto-
recovery feature.
b. Features
• 25-W into an 8-
/'1)URPD96XSSO\
• 20-W into an 4-
/RDG
at 10% THD+N From a12-V Supply
• 94% Efficient Class-D Operation into 8-
/RDG(OLPLQDWHVHDW6LQNV
• Wide Supply Voltage Range Allows Operationfrom 8 to 26 V
• Filter-Free Operation
• SpeakerGuard™ Speaker Protection IncludesAdjustable Power Limiter plus DC Protection
• Flow Through Pin Out Facilitates Easy BoardLayout
• Robust Pin-to-Pin Short Circuit Protection andThermal Protection with Auto-Recovery
Option
• Excellent THD+N/ Pop Free Performance
• Four Selectable, Fixed Gain Settings
• Differential Inputs
28
LC-32LE340/343
LC-40LE340/343
Содержание LC-32LE340E
Страница 39: ...LC 32LE340 343 LC 40LE340 343 21 c BCM3556 Block Diagram 39 LC 32LE340 343 LC 40LE340 343 ...
Страница 48: ...LC 32LE340 343 LC 40LE340 343 30 b Pinning 48 LC 32LE340 343 LC 40LE340 343 ...
Страница 54: ...LC 32LE340 343 LC 40LE340 343 35 c Pinning 54 LC 32LE340 343 LC 40LE340 343 ...
Страница 61: ...LC 32LE340 343 LC 40LE340 343 b Block Diagram b Block Diagram 61 LC 32LE340 343 LC 40LE340 343 ...
Страница 62: ...LC 32LE340 343 LC 40LE340 343 Figure 8 Pin Diagram 62 LC 32LE340 343 LC 40LE340 343 ...
Страница 76: ...LC 32LE340 343 LC 40LE340 343 57 Video Settings Audio Settings 76 LC 32LE340 343 LC 40LE340 343 ...
Страница 77: ...LC 32LE340 343 LC 40LE340 343 58 Options 1 Menu Options 2 Menu 77 LC 32LE340 343 LC 40LE340 343 ...
Страница 78: ...LC 32LE340 343 LC 40LE340 343 59 Tuner Settings Menu Source Settings Menu 78 LC 32LE340 343 LC 40LE340 343 ...
Страница 79: ...LC 32LE340 343 LC 40LE340 343 60 Diagnostic Menu 21 General Block Diagram 79 LC 32LE340 343 LC 40LE340 343 ...
Страница 80: ...LC 32LE340 343 LC 40LE340 343 NOTES 80 LC 32LE340 343 LC 40LE340 343 ...
Страница 139: ...Notes ...