®
LY8661
Rev. 1.8
Dual 2.0W/CH Stereo Audio Amplifier include Headphone Function
GENERAL DESCRIPTION
The LY8661 is a dual bridge-connected audio power
amplifier. It is capable of driving 4Ω speaker load at
a continuous average output of 2.0W / 10%
distortion (THD+N) from a 5.5V power supply. It
primarily designed for high quality application in
other portable communication device and portable
and desktop computers device.
The audio amplifier features low power consumption
in shutdown mode. Shutdown may be enabled by
either logic high or low depending on mode
selection(SOP package only). And it has an internal
thermal shutdown protection feature.
LY8661 audio amplifier was designed specifically to
provide high quality output power with a minimal
amount of external components. The LY8661 does
not require output capacitors, and it is ideally suited
for other low voltage applications or portable
electronic
devices
where
minimal
power
consumption is a primary requirement.
FEATURES
2.5V~5.5V Power supply.
Thermal shutdown Protection.
Low current shutdown mode.
No capacitors and networks or bootstrap
capacitors required.
Low noise during turn-on and turn-off transitions.
User selectable stereo headphone function.
User selectable shutdown high or low logic
level. (SOP package only)
Lead free and green package available.
(RoHS Compliant)
Space Saving Package
-- 16-pin QFN 3*3 Package.
-- 16-pin QFN 4*4 Package.
-- 16-pin SOP Package.
APPLICATION
Portable electronic devices
Portable and desktop computers
Cell Phones
Multimedia Monitors
Audio System
PIN CONFIGURATION
Lyontek Inc.
reserves the rights to change the specifications and products without notice.
5F, No. 2, lndustry E . Rd. IX, Science-Based Industrial Park, Hsinchu 300, Taiwan
TEL: 886-3-6668838
1
FAX: 886-3-6668836
®
LY8661
Rev. 1.8
Dual 2.0W/CH Stereo Audio Amplifier include Headphone Function
PIN DESCRIPTION
SYMBOL
+OUTA
V
DD
-OUTA
INA
GND
INB
BYPASS
Pin No.
QFN
1
2/11
3
4
5/6/7/13/16
8
9
10
12
14
15
--
--
SOP
6
12/16
11
10
2/5
13
14
15
1
3
4
7
8/9
Power supply.
Negative BTL output of A channel.
Input of A channel.
Ground.
Input of B channel.
Bypass capacitor which provides the common mode voltage.
Negative BTL output of B channel.
Positive BTL output of B channel.
Headphone sense pin option.
(If None headphone function must connect to GND).
Shutdown the device pin.
Shutdown Mode Selectable.
No connection.
DESCRIPTION
Positive BTL output of A channel.
-OUTB
+OUTB
HP Sense
(Option)
SHUTDOWN
SD Mode
NC
Lyontek Inc.
reserves the rights to change the specifications and products without notice.
5F, No. 2, lndustry E . Rd. IX, Science-Based Industrial Park, Hsinchu 300, Taiwan
TEL: 886-3-6668838
2
FAX: 886-3-6668836
®
LY8661
Rev. 1.8
Dual 2.0W/CH Stereo Audio Amplifier include Headphone Function
APPLICATION CIRCUIT
Figure 1. Without Headphone Typical Application Circuit (QFN16)
Lyontek Inc.
reserves the rights to change the specifications and products without notice.
5F, No. 2, lndustry E . Rd. IX, Science-Based Industrial Park, Hsinchu 300, Taiwan
TEL: 886-3-6668838
3
FAX: 886-3-6668836
®
LY8661
Rev. 1.8
Dual 2.0W/CH Stereo Audio Amplifier include Headphone Function
Figure 2. With Headphone Typical Application Circuit (QFN16)
Lyontek Inc.
reserves the rights to change the specifications and products without notice.
5F, No. 2, lndustry E . Rd. IX, Science-Based Industrial Park, Hsinchu 300, Taiwan
TEL: 886-3-6668838
4
FAX: 886-3-6668836
®
LY8661
Rev. 1.8
Dual 2.0W/CH Stereo Audio Amplifier include Headphone Function
Figure 3. Without Headphone Typical Application Circuit (SOP16)
Lyontek Inc.
reserves the rights to change the specifications and products without notice.
5F, No. 2, lndustry E . Rd. IX, Science-Based Industrial Park, Hsinchu 300, Taiwan
TEL: 886-3-6668838
5
FAX: 886-3-6668836
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