2.3W Dual Audio Power AMP
Description
Silicore
2.
3W DUAL AUDION POWER AMP
DESCRIPTION
The CD2025B is a monolithic integrated circuit consisting of a 2-channel po wer amplifier.
It is suitable for stereo and bridge amplifier application of radio cassette tape recorder.
CD2025B
Outline Drawing
FEATURES
z High ou tput power Stereo: Po=2.
3W (Typ) at Vcc=9V, R L =4 Ω Bridge: Po=4.
7W (Typ) at Vcc=9V, R L =8 Ω z z z z z z Low switching distortion at high frequency.
Small shock noise at th e time of power on/off due to a built-in mu ting circuit Good ripple rejection due to a built-in ripple filter.
Good ch annel separation.
Soft tone at the time of output saturation.
Closed loop voltage gain fixed 45 d B (Bridge: 51dB) but availability with external resistor added.
z z Minimu m nu mb er of external parts required.
Easy to design radiator fin.
BLOCK DIAGRAM AND PIN CONNECTION
PRE GND 7 IN1 8 NF1 POWER GND 9 Fin INPUT AMP 1 + BS1 10 OUT1 11 Vcc 12
SHOCK NOISE REJECTOR
OUT AMP 1 RIPPLE FILTER
INPUT AMP 2 + 6 R.
R 5 IN2
OUT AMP 2
4 Fin 3 NF2 POWER GND BS2
2 OUT2
1 BTL OUT
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Silicore
ABSOLUTE MAXIMUM RATINGS (Ta=25 ° C)
Characteristic Supply Vo ltage Power Diss ipation Operating Te mperature Storage Temp erature *Fin is soldering on the PCB Symbol Vcc PD Topr Tstg
CD2025B
Value 15 4* -20~70 -40~150
Unit V W °C °C
ELECTRICAL CHARACTERISTICS
(unless otherwise specified: Ta=2 5 ° C, Vcc=9V; Rg=6 00 Ω ,f=1kHz) Characteristics Operating Supply Vo ltage Quiescent circuit current Closed loop Vo ltage Gain Channel Balance Output Power Stereo Vi=0V, Stereo Stereo Bridge Stereo THD=10%, R L =4 Ω THD=10%, R L =8 Ω Po Vi=-45dBm Test conditions Symbol Min.
Typ.
Max.
Unit Vcc ICCQ Gvc CB 43 49 -1 1.
7 9 40 45 51 0 2.
3 1.
3 4.
7 THD Ri Stereo, Rg =0 Ω , Vi=150mW f=100Hz Stereo Rg=0 Ω Stereo Rg=10k Ω Stereo Rg=10k Ω Vo =0d B m RR VNO CT 40 21 40 0.
3 0.
5 30 46 0.
3 0.
5 55 1.
0 2.
0 1.
5 % kΩ dB mV dB W 11 55 47 53 +1 V mA dB dB dB
Bridge THD=10%, R L =8 Ω...
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