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Toshiba
Toshiba

TA7368F Datasheet

AUDIO POWER AMPLIFIER


TA7368F Datasheet Preview


TOSHIBA Bipolar Linear Integrated Circuit Silicon Monolithic
TA7368P,TA7368F
TA7368P / F
Audio Power Amplifier
The TA7368P and TA7368F are suitable for the audio power
amplifier of portable cassette tape recorder and radio.
Features
· Very few external parts (only three capacitors)
· Low quiescent current: ICCQ = 6.6mA (typ.) (VCC = 6V)
· Output power
TA7368P
: Pout = 720mW (typ.) (VCC = 6V, RL = 4, THD = 10%)
TA7368P / F
: Pout = 450mW (typ.) (VCC = 6V, RL = 8, THD = 10%)
· Voltage gain: GV = 40dB (typ.)
· Operating supply voltage range: VCC = 2~10V (Ta = 25°C)
Block Diagram
Vin 1/4
Weight
SIP9P2.54A
: 0.92g (typ.)
SSOP10P2251.00 : 0.09g (typ.)
RIPPLE
2/5
9/2
RIPPLE
FILTER
+
-
7/10
+
+-
VCC
Pout
3/6
+ NF
4/7
PHASE
5/8 6/9
PRE-GND PW-GND
RL
/ : TA7368P / TA7368F
1 2002-10-30
Page 1

TA7368P / F
Precaution For Use And Application
1. Input stage
The input stage of power amplifier (equivalent circuit) is comprised of a
PNP differential pair (Q2 and Q3) preceded by a PNP emitter follower
(Q1) which allows DC referencing of the source signal to ground. This
eliminated the need for an input coupling capacitor. However, in case the
brush noise of volume becomes a problem, provide serially a coupling
capacitor to the input side.
/ : TA7368P / TA7368F
9/2
Q2 Q3
FROM PIN 7 / 10
R5
2. Adjustment of voltage gain
The voltage gain is fixed at GV40dB by the resistors (R4 and R5) in IC,
however, its reduction is possible through adding Rf as shown in Figure 2.
In this case, the voltage gain is obtained by the following equation.
GV
=
20log
R5 + R4 + Rf
R4 + Rf
It is recommended to use this IC with the voltage gain of GV = 28dB or
over.
3. Ripple rejection ratio
Adding CRIP, to ripple terminal 2 as shown in Figure 3, the ripple
rejection ratio is improved from -25dB typ. to -45dB typ.
1/4
Q1 Q4
5/8
D1 3 / 6
Fig.1
IN
Vin
1/4
NF
Rf R4
3/6
+ 90
+
R5
10
Fig.2
4. Power dissipation
Care should be taken to use this IC below maximum power dissipation.
Because it may over maximum rating depending on operating condition.
· TA7368P PD = 900mW (Ta = 25°C)
· TA7368F PD = 400mW (Ta = 25°C)
RIPPLE
2/5
CRIP +
Fig.3
5. Phase-compensation
Small temperature coefficient and excellent frequency characteristic is needed by capacitors below.
· Oscillation preventing capacitors for power amplifier output
· Bypass capacitor for ripple filter
· Capacitor between VCC and GND
2 2002-10-30
Page 2

TA7368P / F
Maximum Ratings (Ta = 25°C)
Characteristic
Symbol
Rating
Unit
Supply voltage
Power dissipation
Operating temperature
Storage temperature
TA7368P
TA7368F
VCC
PD (Note)
Topr
Tstg
14
900
400
-2575
-55150
V
mW
°C
°C
(Note) Derated above Ta = 25°C in the proportion of 7.2mW / °C for TA7368P and of 3.2mW / °C for TA7368F.
Electrical Characteristics For TA7368P
(Unless otherwise specified, VCC = 6V, f = 1kHz, Rg = 600, RL = 4, Ta = 25°C)
Characteristic
Quiescent current
Output power
Total harmonic distortion
Voltage gain
Output noise voltage
Ripple rejection ratio
Input resistance
Symbol
ICCQ
Pout
THD
GV
Vno
RR
RIN
Test
Circuit
Test Condition
VCC = 3V, Vin = 0
— VCC = 6V, Vin = 0
VCC = 9V, Vin = 0
VCC = 3V ,RL = 4, THD = 10%
VCC = 6V, RL = 4, THD = 10%
— VCC = 6V, RL = 8, THD = 10%
VCC = 9V, RL = 8, THD = 10%
VCC = 9V, RL = 16, THD = 10%
— Pout = 100mW
— Vin = 0.5mVrms
— Rg = 10k, BPF = 20Hz~20kHz
fr = 100Hz, Vr = 0.3Vrms
Without CRIP
——
Min. Typ. Max. Unit
— 5.5 —
— 6.6 15 mA
— 7.5 18
— 120 —
500 720
300 450 — mW
800 1100 —
450 610
— 0.3 1.0 %
37 40 43 dB
— 0.2 0.5 mVrms
— 25 — dB
— 27 — k
Terminal Voltage For TA7368P
Typical Terminal Voltage at no Signal With Test Circuit. (VCC = 6V, Ta = 25°C)
[Unit: V]
Terminal no.
DC voltage (V)
12345
0
2.40
0.62
0.64
0
6789
0
2.61 NC
6.0
3 2002-10-30
Page 3

TA7368P / F
Electrical Characteristic For TA7368F
(unless otherwise specified, VCC = 6V, f = 1kHz, Rg = 600, RL = 8, Ta = 25°C)
Characteristic
Quiescent current
Output power
Total harmonic distortion
Voltage gain
Output noise voltage
Ripple rejection ratio
Input resistance
Symbol
ICCQ
Pout
THD
GV
Vno
RR
RIN
Test
Circuit
Test Condition
VCC = 3V, Vin = 0
— VCC = 6V, Vin = 0
VCC = 9V, Vin = 0
VCC = 3V, RL = 4, THD = 10%
— VCC = 6V, RL = 8, THD = 10%
VCC = 9V, RL = 16, THD = 10%
— Pout = 100mW
— Vin = 0.5mVrms
— Rg = 10k, BPF = 20Hz~20kHz
fr = 100Hz, Vr = 0.3Vrms,
Without CRIP
——
Min. Typ. Max. Unit
— 5.5 —
— 6.6 15 mA
— 7.5 18
— 120 —
300 450 — mW
450 610
— 0.3 1.0 %
37 40 43 dB
— 0.2 0.5 mVrms
— 25 — dB
— 27 — k
Terminal Voltage For TA7368F
Typical Terminal Voltage at no Signal with Test Circuit. (VCC = 6V, Ta = 25°C)
Terminal no.
DC voltage (V)
123
NC 6.0 NC
45678
0 2.40 0.62 0.64 0
[Unit: V]
9 10
0 2.61
4 2002-10-30
Page 4
Part Number TA7368F
Manufactur Toshiba
Description AUDIO POWER AMPLIFIER
Total Page 11 Pages
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