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SHANGHAI BELLING |
www.DataSheet4U.com
BL8602
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, RL=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(Ta=25℃)
PARAMETER
SYMBOL
Supply Voltage
Vcc
Output Current
Io
Maximum Input,Ripple Rejection, Mute Pin
Vi(max)
Voltage
Applied Output Voltage( Output Pin When
Vo
Disabled)
Temperature Junction
Tj
VALUE
-1~18
±250
-1~Vcc+1
-1~Vcc+1
-55~150
UNIT
V
MA
V
V
℃
http://www.belling.com.cn
-1-
Total 4 Pages
8/15/2006
Wrote by 2006
PIN CONNECTIONS
BL8602
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 kΩ.
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
Supply Voltage
Vcc 2~16
Load Impedance
Peak Load Current
Differental Gain(5KHz Bandwidth)
ZL
IL(peak)
△Gv
8~100
±200
0~46
Voltage at Mute
Vi(mute)
0~Vcc
Ambient Temperature
Ta -20~70
UNIT
V
Ω
mA
dB
V
℃
http://www.belling.com.cn
-2-
Total 4 Pages
8/15/2006
Wrote by 2006
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