YOUDA INTEGRATED CIRCUIT
YD8227
LOW FREQUENCY POWER AMPLIFIER--YD8227
DESCRIPTION
The YD8227P is the audio power amplifier with built-in two channels developed for portable radio cassette
tape recorder with power ON/OFF switch.
FUNCTIONS
*Wide operating supply voltage: Vcc=512V;
*Low quiescent supply current (I
CC
=21mA, typical,at Vcc=9V, Vi=0);
*Output power: Po=2.50W/CH at Vcc=9V, R
L
=4, f=1kHz, THD=10%;
*Soft clip;
*Built-in Thermal shut-down protection circuit;
*Stand-by switch.
BLOCK DIAGRAM
12
11
10
TAB
9
8
7
6
5
4
TAB
3
2
1
Vcc1
Vstb
Pre-GND
+
-
+
-
WuXi YouDa Electronics Co., Ltd
Add: No.5 Xijin Road, National Hi-Tech Industrial Development Zone, Wuxi Jiangsu China
Tel: 86-510-85205117 86-510-85205106 Fax: 86-510-85205110 Website: www.e-youda.com
SHENZHEN OFFICE Tel 86-755-83740369 Fax 86-755-83741418
Ver 5.0 1 of 4 2006-06-28
YOUDA INTEGRATED CIRCUIT
YD8227
ABSOLUTE MAXIMUM RATINGS
(Tamb=25)
PARAMETER SYMBOL VALUE UNIT
Supply Voltage
V
CC
20 V
Output Peak Current
Iop
2.5
A
Power Dissipation
(80*60*1.2mm
3
PCB)
P
D
4.0 W
Operating Temperature
Topr
-25 to +75
Storage Temperature
Tstg
-55 to +150
ELECTRICAL CHARATERISTICS
(V
CC
=9V, Rg=600, f=1kHz, Tamb=25, all voltage referenced to GND unless otherwise specified)
PARAMETER SYMBOL TEST
CONDITIONS MIN
TYP
MAX
UNIT
Quiescent Current
Iccq
Vin=0
21
45
mA
THD=10%, R
L
=4 2.0
2.5
Output Power
Po
THD=10%, R
L
=3
3.0
W
Total Harmonic
Distortion
THD Po=0.4W/CH
0.2
1.0
%
Rf=120 V
O
=0.775V 43 45 47
Voltage Gain
Gv
Rf=0 V
O
=0.775V
56.5
dB
Input
Resistance
Zi
f=1kHz
30 k
Output Noise Voltage
V
N0
Rg=10k
BPF=20Hz20KHz
0.3
1.0
mV
Ripple Rejection Ratio
RR
f=100Hz Rg=600 52 dB
Cross
Talk
CT
Vo=0.775V
50 dB
Input Offset Voltage
V
7-8
30
60
mV
Standby Current
I
SBY
1
A
WuXi YouDa Electronics Co., Ltd 2 of 4 Website: www.e-youda.com
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