KA2206B 2.3W DUAL AUDIO POWER AMP The KA2206B is a monolithic intergrated circuit consisting of a 2-channel power amplifier. It is suitable for stereo and bridge amplifier application of radio cassette tape recorder. 12-DIPH-300 FEATURES • High output power Stereo : PO = 2.3W(Typ) at VCC = 9V, RL = 4Ω. Bridge : PO = 4.7W (Typ) at VCC = 9V, RL = 8Ω • Low switching distortion at high frequency. • Small shock noise at the time of power on/off due to a built-in muting circuit • Good ripple rejection due to a built-in ripple filter. • Good channel separation. • Soft tone at the time of output saturation. • Closed loop voltage gain fixed 45dB (Bridge : 51dB) but availability with external resistor added. • Minimum number of external parts required. • Easy to design radiator fin. 16-DIP-300A ORDERING INFORMATION Device Package KS2206B 12-DIPH-300 Operating Temperature KS22069BN 16-DIP-300A -20°C ~ +70°C BLOCK DIAGRAM PRE GND 7 IN1 NF1 8 9 POWER GND Fin BS1 10 OUT1 11 VCC 12 SHOCK NOISE REJECTOR OUT AMP 1 INPUT AMP 1 + RIPPLE FILTER OUT AMP 2 INPUT AMP 2 + 6 5 4 R.R IN2 NF2 Fin POWER GND Fig. 1 3 2 1 BS2 OUT2 BTL OUT KA2206B 2.3W DUAL AUDIO POWER AMP ABSOLUTE MAXIMUM RATINGS Characteristic Symbol Value Unit Supply Voltage Power Dissipation Operating Temperature Storage Temperature VCC PD T OPR T STG 15 4* -20 ~ +70 -40 ~ +150 V W °C °C * Fin is soldering on the PCB ELECTRICAL CHARACTERISTICS (Ta = 25°C, VCC = 9V, f = 1KHz RG = 600Ω, unless otherwise specified) Characteristic Operating Supply Voltage Symbol Test Conditions Quiescent Circuit Current ICCQ VI = 0, Stereo Closed Loop Voltage Gain GVC Stereo Channel Balance CB Total Harmonic Distortion RI Ripple Rejection Ratio RR Unit 11 V 55 mA 45 47 dB Bridge 49 51 53 dB Stereo -1 0 +1 dB 1.7 2.3 W W VI = -45dBm RL=4Ω, THD = 10%, RL=8Ω, THD = 10%, 1.3 Bridge RL=8Ω, THD = 10%, 4.7 Stereo PO=250mW, R L = 4Ω 0.3 Bridge Input Resistance Max 9 40 PO THD Typ 43 Stereo Ouptut Power Min VCC Stereo,RG=0Ω, VI=150mW W 1.5 % 0.5 % 21 30 KΩ 40 46 dB f=100Hz Output Noise Voltage VNO Cross Talk CT Stereo,RG=0Ω Stereo,RG=10KΩ Stereo,RG=10KΩ, VO=0dBm 40 0.3 1.0 mW 0.5 2.0 mV 55 dB KA2206B 2.3W DUAL AUDIO POWER AMP APPLICATION INFORMATION 1.Stereo application i) Fixed voltage gain (Pin 9 connected to GND directly) 8 + 11 CH1 R1 R2 RF R1 (dB) R2 ii) Variable voltage gain (Rf and C1 connected with pin 9) - 9 GV = 20 log R (dB)1 R2+RF GV = 20 log + C1 2. Bridge application INPUT + + - 9 RF R2 R3 + 5K R4 1 50 11 2 + + C4 i) Fixed voltage gain (Pin 9 connected to GND directly) R1 + 6(dB) R2 ii) Variable voltage gain RF and C1 connected with pin 9) GV = 20 log R1 + 6(dB) R2+RF 4 R1 C1 GV = 20 log 5 CH2 CH1 + 8 RL C6 C2 KA2206B APPLICATION CIRCUIT 1. Stereo Amplifier 2. Bridge Amplifier 2.3W DUAL AUDIO POWER AMP