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EUA6019
3-W Stereo Audio Power Amplifier
with Advanced DC Volume Control
DESCRIPTOIN
The EUA6019 is a stereo audio power amplifier that drives 3
W/channel of continuous RMS power into a 3-load.
Advanced dc volume control minimizes external components
and allows BTL (speaker) volume control and SE (headphone)
volume control. Notebook and pocket PCs benefit from the
integrated feature set that minimizes external components
without sacrificing functionality.
To simplify design, the speaker volume level is adjusted by
applying a dc voltage to the VOLUME terminal. Likewise, the
delta between speaker volume and headphone volume can be
adjusted by applying a dc voltage to the SEDIFF terminal. To
avoid an unexpected high volume level through the
headphones, a third terminal, SEMAX, limits the headphone
volume level when a dc voltage is applied. Finally, to ensure a
smooth transition between active and shutdown modes, a fade
mode ramps the volume up and down.
FEATURES
z Advanced DC Volume Control With 2-dB Steps
From -40 dB to 20 dB
-Fade Mode
-Maximum Volume Setting for SE Mode
-Adjustable SE Volume Control
Referenced to BTL Volume control
z 3 W into 3-Speakers
z Stereo Input MUX
z Differential Inputs
z RoHS Compliant and 100% Lead (Pb)-Free
APPLICATIONS
z Notebook PC
z LCD Monitors
z Pocket PC
DS6019 Ver 1.1 May. 2007
www.DataSheet.in
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Block Diagram
EUA6019
DS6019 Ver 1.1 May. 2007
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Typical Application Circuit
EUA6019
Figure 1. Application circuit using single-ended inputs and input MUX
DS6019 Ver 1.1 May. 2007
Figure 2. Application circuit using differential inputs
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Pin Configurations
Package Type
TSSOP-24
EUA6019
Pin Configurations(Top View)
Pin Description
PIN PIN I/O
DESCRIPTION
PGND
LOUT-
PVDD
LHPIN
1,13 - Power ground
12 O Left channel negative audio output
3,11 - Supply voltage terminal for power stage
10 I Left channel headphone input, selected when HP/LINEis held high
LLINEIN 9 I Left channel line input, selected when HP/LINE is held low
LIN
8
I
Common left channel input for fully differential input. AC ground for single-ended
inputs.
VDD 7 - Supply voltage terminal
RIN
6
I
Common right channel input for fully differential input. AC ground for single-ended
inputs.
RLINEIN 5 I Right channel line input, selected when HP/LINEis held low
RHPIN
4 I Right channel headphone input, selected when HP/LINE is held high
ROUT-
2 O Right channel negative audio output
ROUT+
24 O Right channel positive audio output
SHUTDOWN 15 I Places the amplifier in shutdown mode if a TTL logic low is placed on this terminal
FADE
BYPASS
AGND
SEMAX
SEDIFF
VOLUME
HP/LINE
SE/BTL
LOUT+
16
I
Places the amplifier in fade mode if a logic low is placed on this terminal; normal
operation if a logic high is placed on this terminal
17 I Tap to voltage divider for internal midsupply bias generator used for analog reference
18 - Analog power supply ground
19 I Sets the maximum volume for single ended operation. DC voltage range is 0 to VDD.
20
I
Sets the difference between BTL volume and SE volume. DC voltage range is 0 to
VDD.
21 I Terminal for dc volume control. DC voltage range is 0 to VDD.
22
I
Input MUX control. When logic high, RHPIN and LHPIN inputs are selected .When
logic low, RLINEIN and LLINEIN inputs are selected.
23
I
Output MUX control. When this terminal is high, SE outputs are selected. When this
terminal is low, BTL outputs are selected.
14 O Left channel positive audio output.
DS6019 Ver 1.1 May. 2007
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Ordering Information
Order Number
EUA6019QIR1
EUA6019QIT1
EUA6019
Package Type
TSSOP 24
TSSOP 24
Marking
xxxxx
A6019A
xxxxx
A6019A
Lead Free Code
1: Lead Free 0: Lead
Packing
R: Tape& Reel
T: Tube
Operating temperature range
I: Industry Standard
Package Type
Q: TSSOP
EUA6019
Operating Temperature range
-40 °C to 85°C
-40 °C to 85°C
DS6019 Ver 1.1 May. 2007
www.DataSheet.in
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