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Low Frequency Power Amplifier-Yd8227: Youda Integrated Circuit

The YD8227P is a low frequency audio power amplifier with two channels. It has a wide operating voltage range of 5-12V and low quiescent current of 21mA. It can output 2.5W per channel at 9V with 4Ω load and 1kHz frequency at 10% THD. It has features like soft clip protection and thermal shutdown protection. It is suitable for use in portable radio cassette tape recorders.

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Pedro Rodriguez
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626 views4 pages

Low Frequency Power Amplifier-Yd8227: Youda Integrated Circuit

The YD8227P is a low frequency audio power amplifier with two channels. It has a wide operating voltage range of 5-12V and low quiescent current of 21mA. It can output 2.5W per channel at 9V with 4Ω load and 1kHz frequency at 10% THD. It has features like soft clip protection and thermal shutdown protection. It is suitable for use in portable radio cassette tape recorders.

Uploaded by

Pedro Rodriguez
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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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=5～12V;
*Low quiescent supply current (ICC=21mA, typical,at Vcc=9V, Vi=0);
*Output power: Po=2.50W/CH at Vcc=9V, RL=4Ω, 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
Vcc1
-
+

+
-
Vstb Pre-GND
1 2 3 TAB 4 5 6

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 VCC 20 V


Output Peak Current Iop 2.5 A
Power Dissipation
PD 4.0 W
(80*60*1.2mm3 PCB)
Operating Temperature Topr -25 to +75 ℃
Storage Temperature Tstg -55 to +150 ℃

ELECTRICAL CHARATERISTICS
(VCC=9V, Rg=600Ω, 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%, RL=4Ω 2.0 2.5
Output Power Po W
THD=10%, RL=3Ω 3.0
Total Harmonic
THD Po=0.4W/CH 0.2 1.0 %
Distortion
Rf=120Ω VO=0.775V 43 45 47
Voltage Gain Gv dB
Rf=0Ω VO=0.775V 56.5

Input Resistance Zi f=1kHz 30 kΩ


Rg=10kΩ
Output Noise Voltage VN0 0.3 1.0 mV
BPF=20Hz～20KHz

Ripple Rejection Ratio RR f=100Hz Rg=600Ω 52 dB

Cross Talk CT Vo=0.775V 50 dB

Input Offset Voltage V7-8 30 60 mV

Standby Current ISBY 1 μA

WuXi YouDa Electronics Co., Ltd 2 of 4 Website: www.e-youda.com


YOUDA INTEGRATED CIRCUIT YD8227

APPLICATION CIRCUIT

Vcc

Stand-by SW
+ +
100μ
1 12 0.01μ 470μ

3
Vin1 + 6 + + 100μ
4.7μ +
2
120Ω
470μ
5 -
+ 0.1μ
100μ 4.7Ω SPEAKER

+ 9
47μ
10
Vin2 + 7 + + 100μ
4.7μ +
11
120Ω
8 470μ
-
+ 0.1μ
SPEAKER
100μ
4.7Ω

4 TAB

WuXi YouDa Electronics Co., Ltd 3 of 4 Website: www.e-youda.com


YOUDA INTEGRATED CIRCUIT YD8227

OUTLINE DRAWING

WuXi YouDa Electronics Co., Ltd 4 of 4 Website: www.e-youda.com

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