BL8602 BELLING | Alldatasheet
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Technical content
http://www.belling.com.cn - 1 - 8/15/2006 Total 4 Pages Wrote by 2006 BL8602 Low Power Audio Amplifier
DESCRIPTION
The BL8602 is a low power audio amplifier integrated circuit intended(primarily) for telephone applications, such as in speakerphones. It provides differential speaker outputs to maximize output swing at low supply voltages(2.0 V minimum).Coupling capacitors to the speaker are not required. The gain of this amplifier is controlled easily by two external resistors.
FEATURES
- Wide operating supply voltage: Vcc=2V~16V * Low quiescent supply current(Icc=2.2mA,typ) * Medium output power(Po=250mW at Vcc=6V, R L=32ohm,THD ≤10%) * Load impedance range : 8~100ohm * Mute function (Icc=55uA, typ) * Minimum number of external parts required * Low distortion BLOCK DIAGRAM ABSOLUTE MAXIMUM RATINGS(T a=25 ℃℃ ℃℃) PARAMETER SYMBOL VALUE UNIT Supply Voltage Vcc -1~18 V Output Current Io ±250 MA Maximum Input,Ripple Rejection, Mute Pin Voltage Vi(max) -1~Vcc+1 V Applied Output Voltage( Output Pin When Disabled) Vo -1~Vcc+1 V Temperature Junction Tj -55~150 ℃
http://www.belling.com.cn - 2 - 8/15/2006 Total 4 Pages Wrote by 2006 PIN CONNECTIONS PIN FUNCTION DESCRIPTION Symbol Pin Description FC1 1 Analog ground for amplifiers. A 1.0uF capacitor at this pin (with a 5.0uF capacitor at Pin 2) provides (typically) 52dB 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 alternate input. Vin 2 Amplifier input .The input capacitor and resistor set low frequency rolloff and input impedence. The feedback resistor is connected to this pin and Vo1. Vo1 3 Amplifier Output#1. The dc level is ≈(Vcc-0.7V)/2. Vcc 4 DC supply voltage (+2.0V to +16V) is applied to this pin. GND 5 Ground pin for the entire circuit Vo2 6 Amplifier Output#2. This signal is equal in amplitude, but 180 °out- of-phase with that at Vo1. The dc level is ≈(Vcc-0.7V)/2. CD 7 Chip Disable-Digital input. A Logic “0” (<0.8V) sets normal operation. A logic “1” ( ≥2.0V) sets the power down mode. Input impedance is nominally 90 k Ω. FC2 8 A capacitor at this pin increase power supply rejection, and affects turn-on time. This pin can be left open if the capacitor at FC1 is sufficient. RECOMMENDED OPERATION CONDITIONS(Ta=25 ℃℃ ℃℃) PARAMETER SYMBOL VALUE UNIT Supply Voltage Vcc 2~16 V Load Impedance Z L 8~100 Ω Peak Load Current I L(peak) ±200 mA Differental Gain(5KH z Bandwidth) △Gv 0~46 dB Voltage at Mute Vi(mute) 0~Vcc V Ambient Temperature Ta -20~70 ℃
http://www.belling.com.cn - 3 - 8/15/2006 Total 4 Pages Wrote by 2006 ELECTRICAL CHARACTERISTICS (Vcc=6V, Ta=25 ℃℃ ℃℃,unless otherwise specified) PARAMETER SYMBO L TEST CONDITIONS MIN TYP MAX UNI T DC PARAMETER Operating Current Icc Vcc=3V, Mute=0.8V 2.2 4.0 mA Vcc=16V, Mute=0.8V 2.5 5.0 mA Vcc=3V, Mute=2V 55 100 uA Output Voltage Vo R L=16 Ω,Rf=75K Ω Vcc=3V 1.0 1.20 1.25 V Vcc=6V 2.8 V Vcc=12V 6.10 V Output Offset Voltage Voo Vcc=6V,Rf=75K Ω,R L=32 Ω -30 0 30 mV Output High Level VOH 2V<Vcc<16V, Iout= - 75mA Vcc- V Output Low Level VOL 2V<Vcc<16V, Iout= - 75mA 0.16 V Input Bias Current ibias -100 -200 nA Pin 3 100 150 KΩ Equivalent Resistance R EQ Pin 2 18 25 KΩ AC PARAMETER Open Loop Gain of Amp 1. ( f<100Hz) Gvop1 80 dB Close Loop Gain of Amp 2. Gvo2 f=1KHz, R L=32 Ω -0.35 0 0.35 dB Vcc=3V, R L=16 Ω,THD ≤ 10% 55 mW Vcc=6V, R L=32 Ω,THD ≤ 10% 250 Output Power Po Vcc=12V, R L=100 Ω, THD ≤10% 400 Vcc=6V, R L=32 Ω,Po=125mW 0.5 1.0 % Vcc ≥3V, R L=8 Ω,Po=20mW 0.5 % Total Harmonic Distortion( f=1KHz THD Vcc ≥12V,R L=32 Ω, Po=200mW 0.6 % Gain Bandwidth Product GBW 1.5 MHz PSRR C1= ∝,C2=0.01uF 50 dB C1=0.1uF, C2=0, f=1KHz 12 dB Power Supply Rejection (Vcc=6V, △ Vcc=3V) C1=1uF, C2=5uF, f=1KHz 52 dB Muting Gv(mut Mute=2V, 1KHz<f<20KHz 70 dB Chip Disable input Voltage Low V IL 0.8 V High V IH 2.0 V
http://www.belling.com.cn - 4 - 8/15/2006 Total 4 Pages Wrote by 2006 APPLICATION CIRCUIT