1.2W Audio Power Amplifier - Wuxi Youda Electronics
Description
m o YOUDA INTEGRATED YD820 .
c CIRCUIT U 4 t e e h AUDIO POWER AMPLIFIER—YD820 1.
2W S a t a D DESCRIPTION .
w w The YD820 is a monolithic integrated circuit audio amplifier.
It is designed audio frequency class B amplifiers.
w
FEATURES
*Wide operating supply voltage: Vcc=3~14V.
*Low quiescent supply current (Icc=4mA, typical).
*Medium output power Po=1.
2W at Vcc=9V, RL=8ohm, THD=10%.
*Good ripple rejection *Minimum number of external parts required.
BLOCK DIAGRAM
ABSOLUTE MAXIMUM RATINGS
PARAMETER Supply Voltage
m o Storage Temperature Tstg -55~ +150 ¡æ .
c U 4 t e e WuXi YouDa Electronics Co.
, Ltd h S Add: No.
5 Xijin Road, National Hi-Tech Industrial Development Zone, Wuxi a Jiangsu China Tel: 86-510-5205117 86-510-5205108 Fax: 86-510-5205110 Website: at www.
e-youda.
com SHENZHEN OFFICE Tel£º 86-755-83740369 13823533350 Fax£ º 86-755-83741418 .
D w Ver 3.
1 1 of 4 2004-9-20 w w
Operating Temperature Topr -20~ +70 ¡æ
Power Dissipation (Tamb=25¡æ
m o .
c U 4 t e e h S a t a .
D w w w
8 7 6 Vcc 5 _ + 1 2 3 GND 4
(Tamb=25¡æ
)
SYMBOL Vcc Iop PD
VALUE 16 1.
5
UNIT V A
Output Peak Current
)
1.
25
W
YOUDA INTEGRATED CIRCUIT
ELECTRICAL CHARACTERISTICS
(Unless otherwise specified, VCC=9V, RL=8¦¸ PARAMETER Supply Voltage Output DC Voltage Quiescent Circuit Current Input Bias Current SYMBOL Vcc Vo£¨
DC£©
YD820
, Rg=600¦¸ , f=1kHz, Tamb=25¡æ£© MIN 3 4 4.
5 4 0.
1 ¦Ì Vcc =12V, RL=8¦¸ 2 1.
6 0.
9 1.
2 0.
75 0.
25 0.
20 16 60 3.
5 12 5 25¡« 25¡« 7000 20000 0.
8 0.
4 75 Rf =33¦¸ Rf =120¦¸ 45 34 20kHz Rg=10k Rg=50k 3 ¦Ì 0.
4 80 70 42 M¦¸ HZ % dB dB V nA dB dB mV W TYP MAX 16 5 12 UNIT V V mA A
TEST CONDITIONS
Iccq IB THD =10% Rf =120¦¸ Vcc =9V, RL=4¦¸ Vcc =9V, RL=8¦¸ Vcc =6V, RL=4¦¸ Vcc =3.
5V, RL=4¦¸ Vcc =3V, RL=4¦¸ Po=1.
2W Rf=33¦¸ Rf =120¦¸ Rf =33¦¸ Rf =120¦¸ f=1kHz C5=1000¦Ì C5=1000¦Ì F, C8=680pF F, C8=220pF
Output Power
Po
Input Sensitivity
Vin Po=50mW
Input Resistance Gain Bandwidth Total Harmonic Distortion Open Loop Voltage Gain Closed Loop Voltage Gain Input Noise Voltage ...
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