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PDF LY8661 Data sheet ( Hoja de datos )
| Número de pieza | LY8661 | |
| Descripción | Dual 2.0W/CH Stereo Audio Amplifier include Headphone Function | |
| Fabricantes | Lyontek | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de LY8661 (archivo pdf) en la parte inferior de esta página. Total 15 Páginas | ||
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®
Rev. 1.8
LY8661
Dual 2.0W/CH Stereo Audio Amplifier include Headphone Function
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
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.
www.DataSheet4U.com
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
FAX: 886-3-6668836
1
1 page  
®
Rev. 1.8
LY8661
Dual 2.0W/CH Stereo Audio Amplifier include Headphone Function
www.DataSheet4U.com
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
FAX: 886-3-6668836
5
5 Page 
®
Rev. 1.8
LY8661
Dual 2.0W/CH Stereo Audio Amplifier include Headphone Function
This enables the headphone function, turns off Amp A (+out) and Amp B (+out) which mutes the bridged
speaker. The amplifier then drives the headphones, whose impedance is in parallel with resistors R5 and R6.
These resistors have negligible effect on the LY8661’s output drive capability since the typical impedance of
headphones is 32Ω.
Figure 5 also shows the suggested headphone jack electrical connections. The jack is designed to mate with
a four wire (or three wire)plug. The plug’s tip and ring should each carry one of the two stereo output signals,
whereas the sleeve should carry the ground return. The headphone jack with one control pin contact is
sufficient to drive the HP Sense pin when connecting headphones.
As outlined above driving the Speaker (BTL) and Headphone (SE) loads simultaneously using LY8661 is
simple and easy. However this configuration will only work if the HP Logic pin is used to control the BTL/SE
operation and HP Sense pin is connected to GND(Figure 6).
www.DataSheet4U.com
FIGURE 5. With Headphone Circuit (QFN Type)
FIGURE 6. Without Headphone Circuit (QFN Type)
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
FAX: 886-3-6668836
11
11 Page | ||
| Páginas | Total 15 Páginas | |
| PDF Descargar | [ Datasheet LY8661.PDF ] | |
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| Número de pieza | Descripción | Fabricantes |
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