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| THIS DOCUMENT IS FOR MAINTENANCE PURPOSES ONLY AND IS NOT RECOMMENDED FOR NEW DESIGNS DS 3302 -1 SL6310C 500mW SWITCHABLE AUDIO AMPLIFIER/OP AMP The SL6310C is a low power audio amplifier which can be switched off by applying a mute signal to the appropriate pin. Despite the low quiescent current consumption of 5mA (only 0.6mA when muted) a minimum output power of 400mW is available into an 8 load from a 9V supply. NON INV. INPUT INV. INPUT EARTH 1 2 SL6310 3 4 8 7 6 5 MUTE "B" MUTE "A" NC VCC FEATURES Can be Muted with High or Low State inputs Operational Amplifier Configuration Works Over Wide Voltage Range OUTPUT MP8 DG8 DP8 Fig. 1 Pin connections, SL6310 - (top view) APPLICATIONS Audio Amplifier for Portable Receivers Power Op. Amp High Level Active Filter R1 220k V MUTE B MUTE A 100 CC 8 7 + - 6 5 QUICK REFERENCE DATA INPUT 100n 1 2 3 4 OUTPUT R4 120k 100 8 LOAD Supply Voltage: 4.5V to 13.6V Voltage Gain: 70dB Output into 8 on 9V Supply : 400mW (min.) R2 220k 220n R3 4.7k 1 EARTH ABSOLUTE MAXIMUM RATINGS Supply voltage: 15V Storage temperature: --55C to + 125C Fig. 2 SL6310 Test Circuit SL6310C ELECTRICAL CHARACTERISTICS Test conditions (unless otherwise stated): Supply voltage Vcc: 7V Ambient temperature: -30C to +85C Mute facility : Pins 7 and 8 open circuit frequency = 1kHz Value Characteristics Min. Supply current Supply current mute (A) Supply current mute (B) Input offset voltage Input offset current Input bias current (Note 1) Voltage gain Input voltage range CMRR Output power THD NOTE 1. The input bias current flows out of pins 1 and 2 due to PNP input stage 40 400 40 Typ. 5.0 0.55 0.6 2 50 0.2 70 2.1 10.6 60 500 0.4 3 Max. 7.5 1 0.9 20 500 1 mA mA mA mV nA A dB V V dB mW % VCC = 4.5V VCC = 13V RS 10K RL = 8 POUT = 400mW, Gain = 28dB Pin 7 via 470k to earth Pin 8 = VCC RS 10k Units Conditions Fig. 3 SL6310 lamp driver Fig. 4 SL6310 servo amplifier OPERATING NOTES Mute facility The SL6310 has two mute control pins to allow easy interfacing to inputs of high or low levels. Mute control `A', pin 7, is left open circuit or connected to a voltage within 0.65 volt of Vcc (via a 100k resistor) for normal operation. When the voltage on pin 7 is reduced to within 1 volt of earth (via a 100k resistor) the SL6310 is muted Audio amplifier AstheSL6310 is an operational amplifier it is easy to obtain the voltage gain and frequency response required. To keep the input impedance high it is wise to feed the signal to the noninverting input as shown in Fig.2. In this example the input impedance is approximately 100k. The voltage gain is determined by the ratio (R3 + R4)/R3 and should be between 3 and 30 for best results. The capacitor in series with R3, together with the input and output coupling capacitors, determines the low frequency rolloff point. The upper frequency limit is set by the device but can be restricted by connecting a capacitor across R4. Operational amplifier It is impossible to list all the application possibilities in a single data sheet but the SL6310 offers considerable advantages over conventional devices in high output current applications such as lamp drivers (Fig.3) and servo amplifiers (Fig.4) . Buffer and output stages for signal generators are another possibility together with active filter sections requiring high output current. SL6310C 80 74 72 60 GAIN (dB) GAIN (dB) 40 20 100 1k 10k 100k 70 68 66 64 62 4 8 12 VOLTAGE (V) 10 FREQUENCY (Hz) Fig. 5 Gain v. frequency Fig. 6 Gain v. supply voltage 1500 NON - MUTED CURRENT IN MUTED STATE (A) 6 CURRENT IN NON - MUTED STATE (mA) 1.2 4 OUTPUT POWER (W) 0.8 LOAD 1000 MUTE B MUTE A 4 8 LOAD 500 2 0.4 16 LOAD 0 0 MUTE B : PIN 8 TO SUPPLY MUTE A : PIN 7 TO EARTH BY 100k RESISTOR 4 VOLTAGE (V) 8 0 12 0 0 4 VOLTAGE (V) 8 12 Fig. 7 Supply current v. supply voltage Fig. 8 Output power v. supply voltage at 5% (max) distortion |
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