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MP7748 2x20W Stereo Single Ended Class D Audio Amplifier
DESCRIPTION
The MP7748 is a Class D Audio Amplifier for
driving stereo speakers in single-ended
configuration or a mono speaker in bridge-tiedload configuration. It is fully integrated audio
amplifier which dramatically reduces solution
size by integrating the following:
• 250mΩ power MOSFETs
• Startup / Shutdown pop elimination
• Short circuit protection circuits
The MP7748 is capable of delivering 20W per
channel into 4Ω speaker in single-ended output
structure, or delivering 50W into 6Ω speaker in
bridge-tied-load output structure under 24V
VDD. MPS Class D Audio Amplifiers exhibit the
high fidelity of a Class A/B amplifier at high
efficiencies. The circuit is based on the MPS’
proprietary variable frequency topology that
delivers excellent linearity, fast response time
and operates on a single power supply.
MP7748 features programmable VDD
shutdown voltage for each channel by
controlling the UVP node voltage. The default
VDD shutdown (rising threshold) voltage is 8.4V
if the UVP pin is NC.
FEATURES
• Output Power at 24V VDD and 10%
THD+N
• Stereo SE configuration: 20W per channel
into 4Ω load
• Mono BTL configuration: 50W into 6Ω
load
• THD+N = 0.02% at 1W, 8Ω(SE)
• Low Noise (103µV with SE configuration,
140µV with BTL configuration)
• Switching Frequency Up to 1MHz
• 9.5V to 36V Operation from a Single
Supply
• Integrated Startup and Shutdown Pop
Elimination Circuit
• Programmable UVP
• Thermal and Short Circuit Protection
• Integrated Power FETs
• Available in TSSOP28-Exposed Package
APPLICATIONS
• Portable Docking Stations
• Surround Sound DVD Systems
• Televisions
• Flat Panel Monitors
• Multimedia Computers
• Home Stereo Systems
For MPS green status, please visit MPS website under Quality A