Samsung KA8602BD, KA8602B Datasheet

KA8602B LOW VOLTAGE AUDIO AMPLIFIER

ORDERING INFORMATION

INTRODUCTION

The KA8602B is the audio power amplifier available for
low voltages. KA8602B supplies differential outputs for max­imizing output swing at low voltages. KA8602B doesn't
need coupling capacitors to the speaker. The gain of
this amp is controlled easily by two external resistors.

FEATURES

l Wide Supply Voltage (2 ~ 16V)
l Low Quiescent Supply Current (I
l Easy Gain Control
l Medium Output Power

= 2.7mA : Typ)

CC

PO = 250mW at VCC = 6V, RL = 32Ω, THD = 10%

l Minimum External Parts

l Load Impedance Range (8Ω~ 100Ω)

l Low Distortion
l Mute Function (l

= 65µA : Typ)

CC

BLOCK DIAGRAM

8-DIP-300

8-SOP-225

Device Package Operating Temperature

KA8602B 8-DIP-300
KA8602BD 8-SOP-225

- 20°C ~ + 70°C

INPUT(-)

2

INPUT(+)

1

4 BIAS CIRCUIT

Vcc

8 5

RIPPLE

REJECTION

GND

-

Amp1

+

Fig. 1

OUTPUT1

3

R

R

-

Amp2

6

OUTPUT2

+

MUTE

7

KA8602B LOW VOLTAGE AUDIO AMPLIFIER

l l l

l

PIN CONFIGURATION

INPUT(+)

INPUT(-)

1

2

8

RIPPLE REJECTION

7

MUTE

KA8602B

OUTPUT1

Vcc

3

4

6

5

OUTPUT2

GND

Fig. 2

PIN DESCRIPTION

Pin No Symbol Description

Analog Ground for the amplifiers. A 1.0µF capacitor at this pin (with a 5.0µF

1 Input (+)

2

Input (-)

3 Output 1 Amplifier 1’s output. The DC Level is (VCC - 0.7V)/2.
4 V

CC

5 GND Ground pin.
6 Output 2

7 Mute

8

Ripple

Rejection

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.

DC supply voltage (+2.0 ~ + 16V) is applied to this pin.

Amplifier 2’s output. This signal is equal in amplitude, but 180o 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 KA8602B 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.

ABSOLUTE MAXIMUM RATINGS

Characteristic Symbol Vale Unit

Supply Voltage
Output Current (output pin)
Maximum Voltage (input, Ripple rejection, Mute pin)
Applied Output Voltage (output pin) when disabled
Junction Temperature

V

V

CC

I

O

I (MAX)

V

O

T

J

- 1.0 ~ + 18
± 250

- 1.0 ~ VCC + 1.0

- 1.0 ~ VCC + 1.0

- 55 ~ + 140

V

mA

V
V

°C