CD2025B

Silicore 2.3W DUAL AUDION POWER AMP D ESCRIPTION T he 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 O utline Drawing F EATURES H igh ou tput power Stereo: Po=2.3W (Typ) at Vcc=9V, R L =4 Ω B ridge: Po=4.7W (Typ) at Vcc=9V, R L =8 Ω L ow switching distortion at high frequency. S mall shock noise at th e time of power on/off due to a built-in mu ting circuit G ood ripple rejection due to a built-in ripple filter. G ood ch annel separation. S oft tone at the time of output saturation. C losed loop voltage gain fixed 45 d B (Bridge: 51dB) but availability with external resistor added. M inimu m nu mb er of external parts required. E asy to design radiator fin. B LOCK 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 SHAOXING SILICORE TECHNOLOGY CO.,LTD www. Silicore. com. cn 1/3 CHMC Silicore A BSOLUTE MAXIMUM RATINGS (Ta=25 ° C) C haracteristic S upply Vo ltage P ower Diss ipation O perating Te mperature S torage 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 E LECTRICAL CHARACTERISTICS ( unless otherwise specified: Ta=2 5 ° C, Vcc=9V; Rg=6 00 Ω ,f=1kHz) Characteristics Operating Supply Vo ltage Q uiescent circuit current Closed loop Vo ltage Gain Channel Balance O utput Power S tereo 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 T HD 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 Total Harmonic Distortion I nput Resistance Ripple Rejection Ratio O utput Noise Vo ltage Cross Talk S tereo Bridge Po=250 mW R L =4 Ω SHAOXING SILICORE TECHNOLOGY CO.,LTD www. Silicore. com. cn 2/3 CHMC Silicore B RIDGE AMPLIFIER TEST AND APPLICATION CIRCUIT INPUT 100uF 100uF 0.15uF Vcc 470uF 1000uF CD2025B 7 8 9 Fin 10 11 12 CD2025B RL 6 100uF 5 4 Fin 3 2 1 0.15uF 470uF 100uF 100uF A PPLICATION INFORMATION 1. S tereo application ( 1) F ixed Vo ltag e gain 8 R2 + CH1 R1 Rf C1 11 (Pin 9 connected to GND directly ) Gv=20 log( R1/R2) (2) Variable voltage gain (Rf and C, Connected with pin 9) Gv=20 log (R1/(R2+Rf) 9 2 .Bridge application INPUT 8 R2 + CH1 R1 Rf 5K C1 10K 11 2 1 + CH2 R4 R3 4 C2 5 9 C4 RL C6 ( 1) Fixed voltage gain (pin 9 connected to GND directly) Gv=2 0log (R1 /R2 ) (2)Variable voltage gain Rf and C1 connected with pin 9 Gv=20 log (R1/(R2+Rf)) SHAOXING SILICORE TECHNOLOGY CO.,LTD www. Silicore. com. cn 3/3 CHMC