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DUAL PRE-POWER AMP WITH VOLUME CONTROLLER
KA22136/D
INTRODUCTION
The KA22136/D is a monolithic intergrated circuit designed for
use in low voltage and low power applications. It has functions
including dual audio pre-power amplifier, electronic volume
controller and DC motor speed controller in a single chip. It is
suitable for portable tape recorders headphone cassette tape
recorders or radios that are battery-operated.
28-SDIP
FEATURES
28-SOP
¤ Low current consumption in an operating voltage range
¤ Operating supply voltage range: Vcc = 2.1V ~ 5V
¤ Only a few components in composing a headphone cassette
tape recorder
¤ Dual audio pre-power amplifier, electronic volume controller
and DC motor speed controller in a single chip
¤ Reduced input and output coupling capacitors because of 1/2
Vcc AMP adoption on chip as AC GND
ORDERING INFORMATION
Device
Package
Operating Temperature
KA22136 28-SDIP
-20C ~ + 65C
KA22136D 28-SOP
1
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KA22136/D
DUAL PRE-POWER AMP WITH VOLUME CONTROLLER
BLOCK DIAGRAM
PRE
GND
PRE COMPEN
PRE ATT PRE PRE
PWR
MOTOR MOTOR TORQUE SPEED
ADJ
IN2 -SATION
NF2
OUT2 IN2
OFF
V CC V CC OUT2
CNT
V CC
CNT
28 27
26 25 24 23 22
21 20
19 18 17
16 15
-
PRE 2
+
PWR 2
BIAS
CIRCUIT
VOLUME
CONTROL
BIAS
CIRCUIT
MOTOR
SPEED
CONTROL
+
PRE 1
PWR 2
-
1 2 3 4 5 6 7
8 9 10
11
12
13 14
V CC 1 PRE COM- NF1 PRE ATT VOLUME VOL PWR PWR
IN1 PENSATION OUT1 IN1
REF OUT1 GND
1/2 V CC 2 MOTOR MOTOR MOTOR
CNT
GND
Figure 1.
ABSOLUTE MAXIMUM RATINGS (Ta = 25C)
Characteristic
Symbol
Value
Unit
Supply Voltage
V CC
7.5
V
Power Dissipation
P O
450
mW
Operating Temperature
T OPR
-20 ~ +70
C
Storage Temperature
T STG
- 40 ~ +125
C
2
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DUAL PRE-POWER AMP WITH VOLUME CONTROLLER
KA22136/D
ELECTRICAL CHARACTERISTICS
(Ta = 25C, V CC = 3V, unless otherwise specified)
Characteristic
Symbol
Test Conditions
Min. Typ. Max. Unit
Quiescent Circuit Current I CCQ V CC = 3V, V I = 0, I M = 0 - 18 25 mA
PRE AMPLIFIER SECTION
(V CC = 3V, f = 1kHz, R L1 = 10kW, unless otherwise specified)
Characteristic
Symbol
Test Conditions
Min. Typ. Max. Unit
Open Loop Voltage Gain
G VO V O = -10dBm, R L =
- 70 - dB
Closed Loop Voltage Gain
G VC1 V O = -10dBm
40 42 44 dB
Output Voltage
V O THD = 1%
0.45 0.6 - V
Total Harmonic Distortion
THD V O = 0.2V
- 0.05 0.5 %
Output Noise Voltage
V NO1
V i = 0, R g = 2.2kW,
BPF(30 ~ 20kHz)
- 150 300 mV
Input Resistance
R I V O = 10dBm
18 22 - kW
Cross Talk
CT 1 R G = 2.2kW, V O = -10dBm 30 -
- dB
Output Voltage In Pre OFF
V O (OFF)
V I = 100mV
Pre OFF (pin 22) = V CC
-
-
-50 dB
POWER AMPLIFIER SECTION
(Ta = 25C, V CC = 3V, unless otherwise specified)
Characteristic
Symbol
Test Conditions
Min. Typ. Max. Unit
Closed Loop Voltage Gain
G VC2 P O = 5mW
26 28 30 dB
Voltage Gain Difference
DG V V CONT = Max
- 0 3 dB
Output Power 1
P O1 THD = 10%, R L = 32W
20 28 - mW
Output Power 2
P O2 THD = 10%, R L = 16W
30 -
- mW
Total Harmonic Distortion
THD 2 P O = 5mW
- 0.2 2.0 %
Pre+ Power Output Noise Voltage V NO2I V I = 0, R G = 2.2kW, V CONT = Max - 6 10 V
Output Noise Voltage
V NO3I R G = 2.2 kW, V CONT = Min
- 0.25 1.0 mV
Cross Talk
CT 2 R o = 5mW
20 30 - dB
Ripple Rejection Ratio
RR V CC = 3V, 100Hz, 100mVp-p
34 40 - dB
3
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KA22136/D
DUAL PRE-POWER AMP WITH VOLUME CONTROLLER
ATTENUATOR SECTION
(Ta = 25C, V CC = 3V, f = 1kHz, unless otherwise specified)
Characteristic
Symbol
Test Conditions
Min. Typ. Max. Unit
Maximum Input Voltage
V I(MAX)
-
0.2 -
- V
Maximum Attenuation
V ATT(MAX) V CONT = Min
66 -
- dB
Attenuation Error
V ATT(ERR) V CONT = Max
- 0 - dB
Input Impedance
Z I
-
15 20 - KW
MOTOR SPEED CONTROLLER
(Ta = 25C, V CC = 3V, I M = 100mA, unless otherwise specified)
Characteristic
Symbol
Test Conditions
Min. Typ. Max. Unit
Circuit Current
I MC
-
- 3.0 5.0 mA
Starting Current
I MS
-
500 -
- mA
Reference Voltage
V REF V(pin 15, 16)
0.72 0.80 0.87 V
Reference Voltage Regulation 1 DV REF1 V CC = 2.1 ~ 5.0 V
- 0.05 - %/V
Reference Voltage Regulation 2 DV REF2 I M = 25 ~ 250 mA
- 0.01 - %/mA
Reference Voltage Regulation 3 DV REF3 Ta = -10 ~ 50 C
- 0.01 - %/C
Current Coefficient
K
-
32 38 43 -
Current Coefficient Regulation 1
DK1 V CC = 2.1 ~ 5.0 V
- 0.50 - %/V
Current Coefficient Regulation 2
DK2 I M = 25 ~ 250 mA
- 0.05 - %/mA
Current Coefficient Regulation 3
DK3 Ta = -10 ~ 50 C
- 0.02 - %/C
Saturation Voltage
V SAT I M = 200mA, Pin14 = V CC
-
- 0.6 V
Leakage Current
I LKG Pin 18 = V CC
- 50 200 mV
* Voltage across Pin 13, 17
4
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DUAL PRE-POWER AMP WITH VOLUME CONTROLLER
KA22136/D
TEST CIRCUIT
V CC
+
220 m
S.G
RL1
10K
PRE OFF SW
MOTOR
SW
R L2
S.G
16W
M
33m 0.022m
220m
1.5K
+
+
0.15K
28 27
26 25 24 23 22
21 20
19
18 17
16 15
KA22136/D
1 2 3 4 5 6 7 8
9
10
11
12
13 14
0.022m
+
30K
2.2K
R L2
3.3m
RL1
10K
0.1 m
16W
S.G
S.G
ON CONT
Figure 2.
5
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