KA22103 LINEAR INTEGRATED CIRCUIT 19W DUAL POWER AMP 17ZSIP H/S The KA22103 is a monolithic integrated circuit consisting of a 2-channel 19W power amplifier for car stereos. It is designed for high power, low distortion and multi functions. Since it uses an excellent 17-pin package, thermal characteristics are good with high performance. FEATURES High power: 19W/2-Ch (Vcc = 13.2V, f= 1KHz, THD = 10%, R, = 42) Minimum number of external parts required Low distortion: THD =0.04% Low noise: Vxo =0.25mVrms (Voc = 13.2V, RL =4U, Rg = 10K, Gye = 400B, BW = 20Hz ~ 20KHz) Built-in stand-by and mute function Protector: Thermal shut down ORDERING INFORMATION Over voltage protection DC short protection with Vec-output and GND Device | Package , Operating Temperature AC short protection with each output channel KA22103 |17ZSIP H/S | ~30~ +85C * Operating supply voltage range: Vcc = 9V ~ 18V * Connect H/S to GND BLOCK DIAGRAM Voc Voc Voc (2) (10) VS WY STAND-BY CONTROL INPUT 1 (2) PRE NF1 (3) MUTE FUNCTION CONTROL & PROTECTION INPUT 2 (7) PRE wee (8) _(;) er GND & SAMSUNG 10KA22103 LINEAR INTEGRATED CIRCUIT ABSOLUTE MAXIMUM RATINGS (Ta= 25C) Characteristic | Symbol | Value ' Unit | Surge Voltage | Voce (surce) 50 Vv | Supply Voltage Voc | 95 Vv | Output Peak Current lex / 18 V Power Dissipation | Po 50 Ww | Operating Temperature Torr -30~ +85 C | Storage Temperature | Tste ~55~ +150 C ELECTRICAL CHARACTERISTICS (Vcc = 13.2V, R_ = 40, f= tKHz, Ta= 25C) Characteristic Symbol : Test Condition Min Typ | Max | Unit Quiescent Circuit Current loco Vi=0 100 180 mA ~ OutputPower Po "THD = 10% 16 | 19 w Total Harmonic Distortion THD : a Po= 1W 0.04 0.3 % _Glosed Loop Voltage Gain | __ Gre Po | 48 | 50 | 52 | a8 Output Noise Voltage Vno ; Re = 10K2, BPF | 0.25 1 mV Ripple Rejection Ratio RR fa=120Hz, Rg=0 43 | 50 dB Input Resistance R, a : 30 Ka | Output Offset Voltage - Voo Vi=0 a 80 + O- | 480 mV Standby Current Isp At stand-by a C 1 pA Cross Talk _ CT Re =0 65 | - 75 | qB | Saturation Voltage Vear 68) Pin 4,Po=1w>100mw | 18) 21 | 24) Vv | Saturation Voltage Vat (MUTE) Pin 1, Po= 1w> 100mW 1.4 | 1.7 3.0 Vv | & SAMSUNG 71KA22103 LINEAR INTEGRATED CIRCUIT TEST CIRCUIT lec STAND-BY C._-_, , , C\., Oo CONTROL ~, + Vee (13.2V) PRE Vel + FUNCTION & MUTE PROTECTION CONTROL PRE RI, R2, R3, R4: 2.20 wi2 *C7, C8, C9, C10: 0.12y (M) + (.)- \ + C5 GND 220n Fig. 2 SAMSUNG 72KA22103 LINEAR INTEGRATED CIRCUIT APPLICATION INFORMATION Condition Parts Recommended Used for Remark Value Small value Large value C1, C3 4.7 pF DC coupling Reduce the pop noise Caution at Vec-ON with gain ; C2, C4 47pF Feedback Reduce the pop noise Capacitor at Vec-ON Concerned with the low cut-off frequency : C2 = 1/(6.28 x f, = Re) cs 220 uF Reduce the ripple C7, C8, C9, C10 0.12uF Compensation Easy to get Increase ! osc. oscillation | the compensation : C6 1000yF Ripple Used for ripple filter and Hum filter noise filter cit, C12 1000pF Compensation Reduction of noise osc increase the compensation | FUNCTION DESCRIPTION 1. SELECTION OF FEEDBACK RESISTANCE Since the KA22103 has a built-in pre-amp and power-amp, the amp gain is similar to the following equation. Pre-amp gain = Gy (PRE) Power-amp gain = Gy (PWR) Gy = Gy (PRE) + Gv (PWR) So, that voltage gain in next equation at BTL type. Gy total = Gy (PRE) + Gy (PWR) +6 (dB) Depending on the internal circuit. Gy (PRE) = 20 log [ (3.2K + Rr) / (Rr + 200) } (dB) Gy (PWR) = 20 (dB) So, Gy total is Gy total = 20 log [ (3.2K + Rr) / (Re + 200) ] + 20 (dB) By using the last equation, Rr for total gain can be selected. & SAMSUNG 73KA22103 LINEAR INTEGRATED CIRCUIT 2. STAND-BY FUNCTION it is available with supply voltage ON and OFF by using pin 4. Because of the smail control current, it can use a small capacitance switching relay and it can be controlled by micom directly (except the relay). Operating voltage of pin 4 is 2.1 V typically and operating supply current is 1 2A typically in stand-by ON mode. STAND-BY Switch Fig. 3 STAND-BY FUNCTION PREVENTION OF OSCILLATION The sources of oscillation are listed bellow: 1. Gain of amplifier 2. Capacitance of capacito? 3. Kind of capacitor 4. Location of external components on the printed circuit board ~ Capacitor C4 for compensation of the OSC must use a polyester film capacitor to get better temperature and frequency variation characteristics. Especially, if the feedback capacity is higher at low gain; the oscillation at high frequency of audio must be watched. > PREVENTION OF INPUT OFFSET AT Vcc-ON. The input pin and negative feedback pin are the same voltage level with each pre-amp at VocON. The KA22103 presses the offset voltage of the input stage and prevents pop noise of the supply voltage. So, C1 and C2 of the input stage and the NFB capacitor are varied by amp-gain. <Example> At Gy=53.5 (dB) (Re =0) C1=4.7pF, C2=47uF At Gy = 40.5dB (Re = 4700) C1 =3.3nF, C2 = 33yF. Fig. 4 & SAMSUNG "KA22103 LINEAR INTEGRATED CIRCUIT 5. PROTECTION CIRCUIT The KA22103 consists of a short protection circuit between the output and GND, output-Vc, Output-output (each CH). | (1) Output Voltage Detector | | (2) PTR Output Detector | | (3) Over Voitage Detector | THYRISTER SET/RESET THYRISTER ON BIAS Circuit CUT | Current Limiter Circuit POWER TR. Protection Fig. 5 FLOW CHART OF PROTECTION CIRCUIT At Fig. 5, the output voltage detector divides the THYRISTER SET with RESET areas and sets on-mode by setting the THYRISTER circuit. When of released because of an output shortage the THYRISTER returns to the reset mode again and KA22103 is returned to the normal mode. 6. MUTE FUNCTION Mute is available by setting pin 1 at low level. In Fig. 6 when the level is iow, Q1 and Q2 is in tum-on and the ripple capacitor of Pin 8 is discharged. So Vee SET Area RESET Area SET Area GND Fig. 6 it cuts the bias voltage in the internal circuit. The mute attenuation radio is above 60 dB. Ww + { at MUTE A A3 1K VT RI 1K a2 ON @ R2 10K a KA22103 Fig. 7 MUTE Circuit & SAMSUNG Electronics 76