KA8602-S08-R - Unisonic Technologies Co., Ltd.

UNISONIC TECHNOLOGIES CO., LTD

KA8602

LINEAR INTEGRATED CIRCUIT

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LOW VOLTAGE AUDIO POWER

AMPLIFIER

 DESCRIPTION

The UTC KA8602 is the audio power amplifier available for low

voltage. The UTC KA8602 supplies differential outputs for

maximizing output swing at low voltages. The UTC KA8602 does

not need coupling capacitors to the speaker. 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=2.7mA, typ)

*Medium output power (POUT=250mW at Vcc=6V,

R

L=32ohm, THD=10%

*Load impedance range: 8~100ohm

*Mute function (Icc=65μA, typ)

*Minimum number of external parts required.

*Low distortion

DIP-8

SOP-8

 ORDERING INFORMATION

Ordering Number

Normal Lead Free Halogen Free Package Packing

KA8602-D08-T KA8602L-D08-T KA8602G-D08-T DIP-8 Tube

KA8602-S08-R KA8602L-S08-R KA8602G-S08-R SOP-8 Tape Reel

KA8602 LINEAR INTEGRATED CIRCUIT

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 PIN CONFIGURATIONS

PIN NAME DESCRIPTION

1 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. T his pin can be used as an alternative input.

2 Input(-)

Amplifier input. The input capacitor an d resistor set low frequency roll-off a nd input impedance.

The feedback resistor is connected between this pin and output 1.

3 Output 1 Amplifier 1’s output. The DC level is about (Vcc~0.7V)/2.

4 Vcc DC supply voltage is applied to this pin (Vcc=2~16V).

5 GND Ground pin.

6 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.

7 Mute

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”.

8 Ripple

Rejection A capacitor at this pin increase power supply rejection, and affects turn-on time. This pin can be

left open if the capacitor at pin 1 is sufficient.

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 BLOCK DIAGRAM

3

6

7

58

4

1

2-

+Amp 1

-

+Amp 2

R

Output 1

Output 2

Mute

GND

Ripplie

Rejection

Bias

VCC

Non-

Inberting

Input

Inverting

Input

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 ABSOLUTE MAXIMUM RA TINGS (Ta=25°C)

PARAMETER SYMBOL RATINGS UNIT

Supply Voltage Vcc -1~18 V

Output Current IOUT +-250 mA

Maximum Input, Ripple Rejection, Mute Pin Voltage Vi(max) -1~Vcc+1 V

Applied Output Voltage( Output Pin When Disabled) VOUT -1~Vcc+1 V

Temperature Junction TJ -55 ~ +150 °C

Note: Absolute maximum ratings are those values beyond which the device could be permanently damaged.

Absolute maximum ratings are stress ratings only and functional devic e operation is not implied.

 RECOMMENDED OPERATION CONDITIONS (Ta=25°C)

PARAMETER SYMBOL RATINGS UNIT

Supply Voltage Vcc 2~16 V

Load Impedance ZL 8~100 Ω

Peak Load Current IL(PEAK) ±200 mA

Differential Gain (5KHz Bandwidth) ΔGv 0~46 dB

Voltage at Mute VI(mute) 0~Vcc V

Ambient Temperature Ta -20~+70 °C

 ELECTRICAL CHARACTERISTICS (Vcc=6V, Ta=25°C, unless otherwise specified)

PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT

DC PARAMETER Vcc=3V, Mute=0.8V 2.7 4 mA

Vcc=16V, Mute=0.8V 3.3 5 mA

Operating Current Icc Vcc=3V, Mute=2V 65 100 μA

Vcc=3V, RL=16Ω, R1=75KΩ 1 1.15 1.25 V

Vcc=6V, RL=16Ω, R1=75KΩ 2.65 V

Output Voltage VOUT Vcc=12V, RL=16Ω, R1=75KΩ 5.65 V

Output Offset Voltage VO(OFF) Vcc=6V, Rf=75KΩ, RL=32Ω -30 0 30 mV

Output High Level VOH 2V<Vcc<16V, IOUT=-75mA Vcc~1 V

Output Low Level VOL 2V<Vcc<16V, IOUT=75mA 0.16 V

Input Bias Current II(BIAS) -100 -200 nA

Pin 1 100 150 220 KΩ

Equivalent Resistance REQ Pin 8 18 25 40 KΩ

AC PARAMETER

Open Loop Gain of Amp. 1 Gv1 80 dB

Open Loop Gain of Amp. 2 Gv2 f=1KHz, RL=32Ω -0.35 0 0.35 dB

Vcc=3V, RL=6Ω, THD<10% 55 mW

Vcc=6V, RL=32Ω, THD<10% 250 mW

Output Power POUT Vcc=12V, RL=100Ω, THD<10% 400 mW

Vcc=6V, RL=32Ω, POUT=125mW 0.5 1 %

Vcc<3V, RL=8Ω, POUT=20mW 0.5 %

Total Harmonic Distortion

(f=1KHz) THD Vcc<12V, RL=32Ω, POUT=200mW 0.6 %

Gain Bandwidth Product GBW 1.5 MHz

C1=∝, C2=0.01μF 50 dB

C1=0.1μF, C2=0, f=1KHz 12 dB

Power Supply Rejection

(Vcc=6V, ΔVcc=3V) PSRR C1=1μF, C2=5μF, f=1KHz 52 dB

Muting Gv(mute) Mute=2V, 1KHz<f<20KHz 70 dB

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 APPLICATION CIRCUIT

Speaker

7

4

3

6

58

1

2

UTC KA8602

Vee

(-1.0V ~ -8.0V)

Audio

Input

0.1μF

Speaker

Mute

VCC (+1.0V ~ +8.0V) VCC

75kΩ

3kΩ

10kΩ

20kΩ

4.7kΩ

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UTC assumes no responsibility for equipment failures that result from using products at values that

exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or

other param eters) listed in products specif ic ations of any and al l UTC produc ts descri bed or contai ned

herein. UTC products are not designed for use in life support appliances, devices or systems where

m alf unction of these products can be reasonably ex pected to resul t in personal inj ury. Reproducti on in

whole or in part is prohibited without the prior written consent of the copyright owner. The information

presented in t his document does not form part of any quotat ion or contract, is bel iev ed to be accurate

and rel iable and may b e c hanged wit hout n ot ice.