DDX-2100
All-Digital High Efficiency
Power Amplifier
GENERAL DESCRIPTION
The DDX-2100 power device is a monolithic dual
channel H-Bridge that can provide up to 50 watts
per channel of audio power at very high efficiency.
The DDX-2100 power device contains a logic
interface, integrated bridge drivers, high efficiency
MOSFET output transistors and protection
circuitry. The device may be used as a dual
bridge or reconfigured as a single bridge with
double the output current capability.
The benefits of the DDX amplification system are
an all-digital design that eliminates the need for a
digital to analog converter (DAC) and the high
efficiency operation derived from the use of
Apogee's patented damped ternary pulse width
modulation (PWM). This approach provides an
efficiency advantage over conventional Class-D
designs and up to three times the efficiency of
typical Class A/B amplifiers with music input
signals.
FEATURES
HIGH OUTPUT CAPABILITY
2 x 50W
into 8
or
1 x 100W
into 4
SINGLE SUPPLY (+9V to +36V)
SMALL PACKAGE
HIGH EFFICIENCY, >88%
THERMAL OVERLOAD AND SHORT
CIRCUIT PROTECTION
BENEFITS
COMPLETE SURFACE MOUNT DESIGN
POWER SUPPLY SAVINGS
APPLICATIONS
DIGITAL POWERED SPEAKERS
PC SOUND CARDS
CAR AUDIO
SURROUND SOUND SYSTEMS
DIGITAL AUDIO COMPONENTS
Figure 1. Block Diagram
TRISTATE
VCC1P
INLA
FET
DRIVER
OUTPL
IBIAS
PROTECTION
AND
DRIVER
LOGIC
OUTPL
CONFIG
PWRDN
PGND1P
VCC1N
FAULT
FET
DRIVER
OUTNL
TWARN
OUTNL
GNDREF
PGND1N
INLB
INRA
VCC2P
FET
DRIVER
VSIG
OUTPR
REGULATORS
VREG2
OUTPR
VREG2
PGND2P
VCC2N
VREG1
FET
DRIVER
OUTNR
VREG1
OUTNR
GNDR1
PGND2N
INRB
1
Document #11010001-01
November 2001
PRELIMINARY – subject to change without notice