LOW POWER AUDIO AMPLIFIER

www.DataSheet4U.com UTC MC3419 LINEAR INTEGRATED CIRCUIT LOW POWER AUDIO AMPLIFIER DESCRIPTION The UTC MC3419 is a low power audio amplifier integrated circuit, intended for the telephone applications, such as in speakerphones. It provides differential speaker outputs to maximize output swing at low supply voltages. Coupling capacitor to the speaker is not required. Open loop gain is 80dB, and the closed loop gain is set with two external resistors. A chips disable pin permits powering down and/or muting the input signal. SOP-8 DIP-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 to 100ohm) *Low distortion *Mute function (Icc=65µA, typ) *Minimum number of external parts required TSSOP-8 *Pb-free plating product number: MC3419L BLOCK DIAGRAM UTC UNISONIC TECHNOLOGIES CO., LTD. 1 QW-R107-042,A UTC MC3419 LINEAR INTEGRATED CIRCUIT ABSOLUTE MAXIMUM RATINGS (Ta=25°C) PARAMETER Supply Voltage Output Current Maximum Input, Ripple Rejection, Mute Pin Voltage Applied Output Voltage (Output Pin When Disabled) Junction Temperature SYMBOL Vcc Io Vi Vo Tj VALUE -1 to +18 +-250 -1 to +1 -1 to +1 -55 to +150 UNIT V mA V V °C PIN CONFIGURATIONS PIN 1 NAME Mute DESCRIPTION 2 3 4 5 6 7 8 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. Input(+) Analog Ground for the amplifiers. A 1µF capacitor at this pin ( with a 5µF 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. RECOMMENDED OPERATION CONDITIONS (Ta=25°C) 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~+70 UNIT V Ω mA dB V °C UTC UNISONIC TECHNOLOGIES CO., LTD. 2 QW-R107-042,A UTC MC3419 LINEAR INTEGRATED CIRCUIT ELECTRICAL CHARACTERISTICS (Vcc=6V, Ta=25°C, unless otherwise specified) PARAMETER DC PARAMETER Operating Current SYMBOL Icc TEST CONDITIONS Vcc=3V, Mute=0.8V Vcc=16V, Mute=0.8V Vcc=3V, Mute=2V RL=16Ω, R1=75KΩ Vcc=3V Vcc=6V Vcc=12V Vcc=6V, Rf=75KΩ,RL=32Ω 2V