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| LOW VOLTAGE AUDIO AMPLIFIER S1T8602B INTRODUCTION 8-DIP-300 The S1T8602B is the audio power amplifier available for low voltages. S1T8602B supplies differential outputs for maximizing output swing at low voltages. S1T8602B doesn't need coupling capacitors to the speaker. The gain of this amp is controlled easily by two external resistors. FEATURES * * * * * * * * Wide Supply Voltage (2 ~ 16V) Low Quiescent Supply Current (ICC = 2.7mA : Typ) Easy Gain Control Medium Output Power PO = 250mW at VCC = 6V, RL = 32, THD = 10% Minimum External Parts Various Load Impedance Range (8 100) Low Distortion Mute Function (lCC = 65A: Typ) 8-SOP-225 ORDERING INFORMATION Device S1T8602B01-D0B0 S1T8602B01-S0B0 Package 8-DIP-300 8-SOP-225 Operating Temperature - 20C ~ +70C 1 S1T8602B LOW VOLTAGE AUDIO AMPLIFIER BLOCK DIAGRAM INPUT(-) 2 Amp1 3 R OUTPUT1 INPUT(+) 1 + R Amp2 6 OUTPUT2 + Vcc 4 BIAS CIRCUIT 7 MUTE 8 RIPPLE REJECTION 5 GND PIN CONFIGURATION INPUT(+) 1 8 RIPPLE REJECTION INPUT(-) 2 7 MUTE KA8602B S1T8602B OUTPUT1 3 6 OUTPUT2 Vcc 4 5 GND 2 LOW VOLTAGE AUDIO AMPLIFIER S1T8602B PIN DESCRIPTION Pin No 1 Symbol Input (+) Description Analog Ground for the amplifiers. A 1.0F capacitor at this pin (with a 5.0F 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. Amplifier input. The input capacitor and resistor set low frequency roll-off and input impedance. The feedback resistor is connected between this pin and output1. The output of Amplifier 1. DC Level is (VCC -- 0.7V)/2. DC supply voltage (+2.0 -- + 16V) is applied to this pin. Ground pin. The output of Amplifier 2. This signal is equal in amplitude, but 180 out of phase with that at output1. The DC level is (VCC -- 0.7V)/2. This pin can be used to power down the IC to conserve power or for muting, or both. When at a logic Low (0 to 0.8 volts), the S1T8602B is enabled for normal operation. When at a logic High (2.0 to VCC volts), the IC is disabled. If Mute is open, that is equivalent to a logic Low. A capacitor at this pin increases power supply rejection, and affects turn-on time. This pin can be left open if the capacitor at pin 1 is sufficient. 2 3 4 5 6 7 Input (-) Output 1 VCC GND Output 2 Mute 8 Ripple Rejection ABSOLUTE MAXIMUM RATINGS Characteristic Supply Voltage Output Current (output pin) Maximum Voltage (input, Ripple rejection, Mute pin) Applied Output Voltage (output pin) when disabled Junction Temperature Symbol VCC IO VI (MAX) VO TJ Vale - 1.0 ~ + 18 250 - 1.0 ~ VCC + 1.0 - 1.0 ~ VCC + 1.0 - 55 ~ + 140 Unit V mA V V C 3 S1T8602B LOW VOLTAGE AUDIO AMPLIFIER RECOMMENDED OPERATING CONDITIONS Characteristic Supply Voltage Load Impedance Peak Load Current Differential Gain (5KHz Bandwidth) Voltage at Mute (Pin 7) Ambient Temperature Symbol VCC ZL IL (PK) GV VI (MUTE) Ta Min. +2.0 8 - 200 0 0 -20 Typ. - - - - - - Max. +16 100 200 46 VCC 470 Unit V W mA dB V C ELECTRICAL CHARACTERISTIC (VCC = 6V, Ta = 25C, unless otherwise noted) Characteristic Symbol Test Conditions Min. - - 1.0 Typ. Max. Unit DC ELECTRICAL CHARACTERISTICS Operating Current (RL = 0) ICC VCC = 3.0V, Mute = 0.8V VCC = 16.0V, Mute = 0.8V VCC = 3.0V, Mute = 2.0V Output Voltage (output pin) VO RL = 16 R1 = 75k VCC = 3.0V VCC = 6.0V VCC = 12.0V 2.7 3.3 65 1.15 2.65 5.65 0 VCC-1.0 0.16 -100 150 25 - - 90 - 0 - 4.0 5.0 100 1.25 mA A V Output Offset Voltage Output High Level Output Low Level Input Bias Current (pin 2) Equivalent Resistance Input Low Voltage Mute Input High Voltage Input Resistance VOO VOH VOL IBIAS REQ VIL (MUTE) VIH (MUTE) RI (MUTE) VCC = 6.0V, Rf = 75k, RL = 32 2.0V VCC 16V, Iout = -75mA 2.0V VCC 16V, Iout = 75mA -30 - - - 100 18 +30 - - -200 220 40 0.8 - 175 - +0.35 - mV V V nA k V V k - pin 1 pin 8 - - VCC = Mute = 16V - 2.0 50 AC ELECTRICAL CHARACTERISTICS Open Loop Gain (Amp 1) Close Loop Gain (Amp 2) Output Power GV (AMP1) GV (AMP2) PO - f = 1.0kHz, RL = 32 VCC = 3.0V, RL = 6, THD 10% VCC = 6.0V, RL = 32, THD 10% VCC = 12V, RL = 100, THD 10% 80 -0.35 55 250 400 dB dB mW 4 LOW VOLTAGE AUDIO AMPLIFIER S1T8602B ELECTRICAL CHARACTERISTIC (Continued) (VCC = 6V, Ta = 25C, unless otherwise noted) Characteristic Total Harmonic Distortion (f = 1.0kHz) Gain Bandwidth Product Power Supply Rejection (VCC = 6.0V, VCC = 3.0V) Muting Symbol THD Test Conditions VCC = 6.0V, RL = 32, PO =125mW VCC3.0V, RL = 8, PO = 20mW VCC12V, RL = 32, PO = 200mW Min. - Typ. 0.5 0.5 0.6 1.5 12 52 Max. 1.0 Unit % GBW PSRR - C1 = , C2 = 0.01F C1 =0.1F, C2=0, f=1.0kHz C1 = 1.0F, C2 = 5.0F, f = 1.0kHz Mute = 2.0V, 1.0Khz f 20kHz - 50 - - MHz dB GV (MUTE) - > 70 - dB 5 S1T8602B LOW VOLTAGE AUDIO AMPLIFIER APPLICATION CIRCUIT Vcc Mute Rf 4 0.1F Audio Input Ri 2 7 3 S1T8602B 1 8 + 5F 5 KA8602B 6 Speaker + 1F Figure 1. Vcc Mute 75K 4 0.1F Audio Input 2 7 3 KA8602B S1T8602B 1 3K + 0.1F 8 + 5F 5 6 Speaker Figure 2. 6 LOW VOLTAGE AUDIO AMPLIFIER S1T8602B Vcc(1.0 ~8.0V) 75K Vcc 4 0.1F Audio Input 3K 2 7 4.7K 3 KA8602B S1T8602B 1 8 5 10K V EE( -1.0 ~ -8.0V) 20K 6 Speaker 20K Mute Figure 3. Vcc Mute 75K 4 0.1F Audio Input 2 7 3 S1T8602B 1 8 503 5 6 KA8602B Speaker 503 + 5.1K 5.1K 5F Figure 4. 7 S1T8602B LOW VOLTAGE AUDIO AMPLIFIER Vcc 101 100K 100K Mute 100 4 2 7 3 S1T8602B KA8602B 0.1F Audio Input 1 8 503 5 6 Speaker 503 + 5.1K 5.1K 5F Figure 5. 8 |
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