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| UTC KA8602 LINEAR INTEGRATED CIRCUIT LOW VOLTAGE AUDIO POWER AMPLIFIER DESCRIPTION The UTC KA8602 is the audio power amplifier available for low voltage. The UTC KA8602 supplies differential outputs for maximizing output swing at low voltages. The UTC KA8602 does not need coupling capacitors to the speaker. The gain of this amplifier is controlled easily by two external resistors. SOP-8 FEATURES *Wide operating supply voltage: Vcc=2V~16V *Low quiescent supply current( Icc=2.7mA, typ) *Medium output power( Po=250mW at Vcc=6V, RL=32ohm, THD=10% *Load impedance range: 8~100ohm *Mute function (Icc=65A, typ) *Minimum number of external parts required. *Low distortion DIP-8 BLOCK DIAGRAM UTC UNISONIC TECHNOLOGIES CO., LTD. 1 QW-R108-009,A UTC KA8602 LINEAR INTEGRATED CIRCUIT SYMBOL Vcc Io Vi(max) Vo Tj ABSOLUTE MAXIMUM RATINGS(Ta=25C ) PARAMETER Supply Voltage Output Current Maximum Input, Ripple Rejection, Mute Pin Voltage Applied Output Voltage( Output Pin When Disabled) Temperature Junction VALUE -1~18 +-250 -1~Vcc+1 -1~Vcc+1 -55 ~ 150 UNIT V mA V V C PIN CONFIGURATIONS PIN 1 DESCRIPTION Analog Ground for the amplifiers. A 1F capacitor at this pin ( with a 5F capacitor at pin 8) provides 52dB( typ) of power supply rejection. Turn-on time of the circuit is affected by the capacitor on this pin. This pin can be used as an alternative input. Input(-) Amplifier input. The input capacitor and resistor set low frequency roll-off and input impedance. The feedback resistor is connected between this pin and output 1. Output 1 Amplifier 1' s output. The DC level is about (Vcc~0.7V)/2. Vcc DC supply voltage is applied to this pin( Vcc=2~16V). GND Ground pin. Output 2 Amplifier 2' s output. This signal is equal in amplitude, but 180 out of phase with that output 1, the DC level is about (Vcc~0.7V)/2. Mute This pin can be used to power down the IC to converse power, or for muting, or both. When at a logic " LOW" (less than 0.8V), the IC is enabled for normal operation. When at a logic "HIGH" (2V to Vcc), the IC is disabled. If Mute is open, that is equivalent to a logic " LOW" . Ripple A capacitor at this pin increase power supply rejection, and affects turn-on time. This pin can be Rejection left open if the capacitor at pin 1 is sufficient. NAME Input(+) 2 3 4 5 6 7 8 RECOMMENDED OPERATION CONDITIONS(Ta=25C) PARAMETER Supply Voltage Load Impedance Peak Load Current Differential Gain(5KHz Bandwidth) Voltage at Mute Ambient Temperature SYMBOL Vcc ZL IL(peak) Gv Vi(mute) Ta VALUE 2~16 8~100 +-200 0~46 0~Vcc -20~470 UNIT V mA dB V C UTC UNISONIC TECHNOLOGIES CO., LTD. 2 QW-R108-009,A UTC KA8602 PARAMETER DC PARAMETER Operating Current LINEAR INTEGRATED CIRCUIT SYMBOL Icc ELECTRICAL CHARACTERISTICS(Vcc=6V, Ta=25C, unless otherwise specified) TEST CONDITIONS Vcc=3V, Mute=0.8V Vcc=16V, Mute=0.8V Vcc=3V, Mute=2V RL=16, R1=75K Vcc=3V Vcc=6V Vcc=12V Vcc=6V, Rf=75K,RL=32 2V TYP 2.7 3.3 65 MAX 4 5 100 1.25 UNIT mA mA A V V V mV V V nA K K dB dB mW mW mW % % % MHz dB dB dB dB Output Voltage Vo 1 Output Offset Voltage Output High Level Output Low Level Input Bias Current Equivalent Resistance AC PARAMETER Open Loop Gain of Amp. 1 Open Loop Gain of Amp. 2 Output Power Voo VOH VOL Ibias REQ -30 100 18 80 -0.35 55 250 400 1.15 2.65 5.65 0 Vcc~1 0.16 -100 150 25 30 -200 220 40 Gv1 Gv2 Po Total Harmonic Distortion (f=1KHz) THD f=1KHz, RL=32 Vcc=3V, RL=6, THD<10% Vcc=6V, RL=32, THD<10% Vcc=12V, RL=100, THD<10% Vcc=6V, RL=32, Po=125mW Vcc<3V, RL=8, Po=20mW Vcc<12V, RL=32, Po=200mW 0 0.35 0.5 0.5 0.6 1.5 50 12 52 70 1 Gain Bandwidth Product Power Supply Rejection (Vcc=6V, Vcc=3V) GBW PSRR C1=, C2=0.01F C1=0.1F, C2=0, f=1KHz C1=1F, C2=5F, f=1KHz Mute=2V, 1KHz Gv(mute) APPLICATION CIRCUIT UTC UNISONIC TECHNOLOGIES CO., LTD. 3 QW-R108-009,A UTC KA8602 LINEAR INTEGRATED CIRCUIT UTC UNISONIC TECHNOLOGIES CO., LTD. 4 |
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