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Eutech Microelectronics

EUA2112 Datasheet Preview

EUA2112 Datasheet

25-W Mono Class-D Audio Power Amplifier

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EUA2112
25-W Mono Class-D Audio Power
Amplifier with Speaker Protection
DESCRIPTION
The EUA2112 is a high efficiency, one channel
bridged-tied load (BTL), class-D audio power amplifier.
Operating from a 24V power supply, EUA2112 is capable
of delivering 25W of continuous output power to a 8load
with 10% THD+N. The EUA2112 features a differential
input architecture offering improved noise immunity over a
single-ended (SE) input amplifier. Amplifier gain is
internally configured and can be selected to 20, 26, 32 or
36dB utilizing the Go and G1 gain select pins. Advanced
EMI suppression technology enables the use of
inexpensive ferrite bead at the outputs while meeting EMC
requirements.
The speaker protection circuitry is integrated into
EUA2112 to limit the amount of current through the
speaker. The EUA2112 also features short-circuit and
thermal protection preventing the device from being
damaged during a fault condition. The EUA2112 is
available in thermally efficient 28-pin TSSOP package.
FEATURES
z Wide Supply Voltage: 8V to 26V
z Unique Modulation Scheme Reduces EMI Emission
z 25W into an 8-Load From a 24-V Supply
z 20W into a 4-Load From a 12-V Supply
z 94% Efficient Class-D Operation Eliminates
Need for Heat Sinks
z Four Selectable, Gain Settings
z Differential Inputs
z Speaker Protection Circuitry
z Thermal and Short-Circuit Protection
z 28-pin TSSOP Package with Thermal Pad
z RoHS compliant and 100% lead(Pb)-free
Halogen-Free
APPLICATIONS
z Televisions
Typical Application Circuit
DS2112 Ver0.1 Apr. 2010
Figure1. Simplified Application Schematic
1




Eutech Microelectronics

EUA2112 Datasheet Preview

EUA2112 Datasheet

25-W Mono Class-D Audio Power Amplifier

No Preview Available !

Pin Configurations
Package Type
Tel: 0755-8398 3377 / 135 9011 2223 http://www.gofotech.com
EUA2112
Pin Configurations
TSSOP-28
Pin Description
PIN
SD
FAULT
GND
TSSOP-28
1
2
3,4
I/O/P
I
O
I
DESCRIPTION
Shutdown logic input for audio amp (LOW = outputs Hi-Z, HIGH = outputs
enabled). TTL logic levels with compliance to AVCC.
Open drain output used to display short circuit or dc detect fault status.
Voltage compliant to AVCC. Short circuit faults can be set to auto-recovery
by connecting FAULT pin to SD pin. Otherwise, both short circuit faults and
dc detect faults must be reset by cycling PVCC.
Connect to local ground.
GAIN0 5 I Gain select least significant bit. TTL logic levels with compliance to AVCC.
GAIN1 6 I Gain select most significant bit. TTL logic levels with compliance to AVCC.
AVCC 7,14 P Analog supply
AGND 8 P Analog signal ground. Connect to the thermal pad.
GVDD
9
O
High-side FET gate drive supply. Nominal voltage is 4.5V. Also should be
used as supply for PLIMIT function.
PLIMIT
10
I
Power limit level adjust. Connect a resistor divider from GVDD to GND to set
power limit. Connect directly to GVDD for no power limit.
INN 11 I Negative audio input. Biased at 2.25V.
INP 12 I Positive audio input. Biased at 2.25V.
NC 13 P Not connected
PVCC 15,16,27,28 P Power supply H-bridge. PVCC pins are connect internally.
BSP
17,21
I Bootstrap I/O for positive high-side FET.
OUTP
18,20
O Class-D H-bridge positive output.
PGND
19,24
Power ground for the H-bridges.
BSN
22,26
I Bootstrap I/O for negative high-side FET.
OUTN
23,25
O Class-D H-bridge negative output.
DS2112 Ver0.1 Apr. 2010
2


Part Number EUA2112
Description 25-W Mono Class-D Audio Power Amplifier
Maker Eutech Microelectronics
PDF Download

EUA2112 Datasheet PDF






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