TA8252H
2002-10-30
1
TOSHIBA Bipolar Linear Integrated Circuit Silicon Monolithic
TA8252H
Max Power 37W BTL 4ch Audio Power IC
The TA8252H is 4ch BTL audio power amplifier for car audio
application.
This IC can generate more high power: P
OUT
MAX = 37W
as it is included the pure complementary PNP and NPN
transistor output stage.
It is designed low distortion ratio for 4ch BTL audio power
amplifier,built-in stand-by function, muting function,clip
detector,and diagnosis circuit.
Additionally, the AUX.amplifier is built-in, it can make the beep
signal etc.output to 2 channnels (out 1 and 4).It contains various
kind of protectors for car audio use.
Features
High power
: P
OUT
MAX (1) = 37W (typ.)
(V
CC
= 14.4V, f = 1kHz, EIAJ max., R
L
= 4)
: P
OUT
MAX (2) = 35W (typ.)
(V
CC
= 13.7V, f = 1kHz, EIAJ max., R
L
= 4)
: P
OUT
(1) = 24W (typ.)
(V
CC
= 14.4V, f = 1kHz, THD = 10%, R
L
= 4)
: P
OUT
(2) = 21W (typ.)
(V
CC
= 13.2V, f = 1kHz, THD = 10%, R
L
= 4)
Built-in clip detector & diagnosis circuit.(pin(25))
Low distortion ratio: THD = 0.02% (typ.)
(V
CC
= 13.2V, f = 1kHz, P
OUT
= 5W, R
L
= 4)
Low noise: V
NO
= 0.10mV
rms
(typ.)
(V
CC
= 13.2V, R
g
= 0, G
V
= 26dB, BW = 20~20kHz)
Built-in stand-by switch function (pin(2))
Built-in multing function (pin(24))
Built-in AUX. amplifier from single input (pin(16)) to 2 channels output; out1 and 4
Built-in various protection circuit
: Thermal shut down, Over voltage, Out to GND, Out to V
CC,
Out to Out short.
Operating supply voltage: V
CC (opr)
= 9~18V
Weight: 9.8g (typ.)
TA8252H
2002-10-30
2
Block Diagram
15
1
20
6
C
1
IN1
TAB
V
CC1
V
CC2
OUT1(+)
OUT1(
-)
GND1
+
-
+
-
17
18
19
R
L
C
5
C
3
14
C
1
IN2
OUT2(+)
OUT2(
-)
GND2
+
-
+
-
23
22
21
R
L
11
C
1
IN3
OUT3(+)
OUT3(
-)
GND3
+
-
+
-
9
8
7
R
L
12
C
1
IN4
OUT4(+)
OUT4(
-)
GND4
+
-
+
-
3
4
5
R
L
16
AUX IN
13
PRE-GND
10
2
25
24
C
2
R
1
C
4
RIP
CLIP OUT
&
STBY DIAGNOSIS OUT MUTE
-
+
-
+
-
+
TA8252H
2002-10-30
3
Caution And Application Method
(description is made only on the single channel.)
1. Voltage gain adjustment
This IC has no NF (negative feedback) terminals. Therefore, the voltage gain can't adjusted, but it makes the
device a space and total costs saver.
The voltage gain of amp.1: G
V1
= 0dB
The voltage gain of amp.2A, B: G
V2
= 20dB
The voltage gain of BTL connection: G
V (BTL)
= 6dB
Therefore, the total voltage gain is decided by expression below.
G
V
= G
V1
+ G
V2
+ G
V (BTL)
= 0 + 20 + 6 = 26 dB
2. Stand-by SW function (pin(2))
By means of controlling pin(2) (stand-by terminal) to high
and low, the power supply can be set to on and off.
The threshold voltage of pin(2) is set at about 3V
BE
(typ.),
and the power supply current is about 2A (typ.) at the
stand-by state.
Control voltage of pin(2): V
(SB)
Stand
-by Power V
(SB)
(V)
On Off
0~1.5
Off On 3~6
Adjustage of stand-by SW
(1) Since V
CC
can directly be controlled to on or off by the microcomputer, the switching relay can be omitted.
(2) Since the control current is microscopic, the switching relay of small current capacity is satisfactory for
switching
+
-
+
-
+
-
(Fig.1) Block diagram
Amp. 2B
Amp. 2A
Amp. 1
Input
2
V
CC
2V
BE
10k
Power
ON
OFF
(Fig.2) With pin(2) set to High,
Power is turned ON
to Bias
cutting circuit
TA8252H
2002-10-30
4
Stand
-by switch method
(Fig.3)
3. Multing function (pin(24))
By means of controlling pin(24) less than 0.5V, it can make the audio muting condition.
The muting time constant is decided by R
1
and C
4
and these parts is related the pop noise at power on / off.
The series resistance; R
1
must be set up less than 15k, we recommend 10k.
The muting function have to be controlled by a transistor, FET and -COM port which has
I
MUTE
> 250A ability.
Terminal (24) must not be pulled up and it shall be controlled by open / low.
(Fig.4) Muting function
(Fig.5) Mute attenuation
-Vmute (V)
V
CC
Large current capacity switch
Battery
Conventional Method
V
CC
Relay
Battery
From
microcomputer
V
CC
Stand-By
Small current capacity switch
Battery
V
CC
Stand-By
Battery
Directly from
microcomputer
I
MUTE
V
MUTE
R
1
C
4
I
MUTE
(OFF)
I(100A)
24
A
ATT V
mute
Pin(24) voltage : V
mute
(V)
Mut
e
a
tte
nu
ati
o
n A
T
T
(
d
B
)
20
-100
0
0
-20
-40
-60
-80
0.4 0.8 1.2 1.6 2 2.4 2.8
R1 = 15k
10k
5k
VCC = 13.2 V
Po = 10 W
RL = 4
f = 1 kHz
TA8252H
2002-10-30
5
4.AUX. input (pin(16))
The pin(16) is for input terminal of AUX. amplifier.
The total gain is 0dB by using of AUX. amplifier.
Therfore, the -COM can directly drive the AUX. amplifier.
Beep sound or voice synthesizer signal can be input to pin(16) directly.
5. Diagnosis output (pin(25))
The diagnosis output terminal of pin(25) has open collector output structure on clip as shown in Fig.7.
In unusual case that output terminal of power amp. is condition of output to V
CC
or output to GND short and
over voltage input mode, it is possible to protect all the system of apparatus as well as power IC protection.
In case of being unused this function, use this IC as open-connection on pin(25).
Pin(25): Open collector output (active low)
(Fig.7)
(Fig.8)
+
-
+
-
16
-COM
AUX-IN
AUX AMP
-20dB
IN
OUT(+)
OUT(-)
(Fig.6) AUX input
20dB AMP.
25
-COM
Memory
RegulatorOFF
Alarm
LED/LCD
(Count and record)
(RelayOFF)
(Announcement
from a speaker.)
(Flashing)
5V
(Application)
25
Diagnosis
output
Clip detector
output
5V
V3
5V
GND
Outpout short or over voltage input
t
TA8252H
2002-10-30
6
6. Output clip detection function (pin(25))
The output clip detection terminal of pin(25) has the open collector output structure on chip as shown in Fig.9.
In case that the output waveform is clipping, the clip detection circuit is operated and NPN tr. is turned on.
It is possible to improve the audio quality with controlling the volume, tone control circuit through
L.P.F. smoothing circuit as shown in Fig.9.
In case of being unused this function, use this IC as open connection on pin(25).
(Application)
AC
(A)
(B)
(C)
t
t
t
DC
DC
5V
GND
(C) Clip DET. terminal
(pin )
25
(B) Clip detector circuit
(internal)
(A) Output (AC wave form)
25
5V
25
Pin : Open collector output (active low)
(Fig.9)
Clip detector
output
L.P.F.
Smoothing
circuit
Volume control circuit
Tone control circuit
Diagnosis
output
TA8252H
2002-10-30
7
7. Cross talk
The cross talk characteristics of the IC is not good between out1 and 2, out3 and 4.
So we recommend to use by below method.
Out1, 2
L
-ch (or R-ch)
Out3, 4
R
-ch (or L-ch)
And, please refer to below table in case of applying the AUX. in because it is out to out1 and 4.
ex) In case of the signal from AUX. in to front speakers.
Out1 Front
AUX.
out
Out2 Rear
L
-ch (or R-ch)
--
Out3 Rear
--
Out4 Front
R
-ch (or L-ch)
AUX. out
TA8252H
2002-10-30
8
Maximum Rating
(Ta = 25C)
Characteristic Symbol
Rating
Unit
Peak supply voltage (0.2s)
V
CC (surge)
50 V
DC supply voltage
V
CC (DC)
25 V
Operating supply voltage
V
CC (opr)
18 V
Output current (peak)
I
O (peak)
9 A
Power dissipation
P
D
(*) 250 W
Operating temperature
T
opr
-40~85 C
Storage temperature
T
stg
-55~150 C
(*): Package thermal resistance
j
-T
= 0.5C / W (typ.)
(Ta = 25C, with infinite heat sink)
Electrical Characteristics
(unless otherwise specified V
CC
= 13.2V, f = 1kHz, R
L
= 4, Ta = 25C)
Characteristic Symbol
Test
Cir
-
cuit
Condition Min.
Typ.
Max.
Unit
Quiescent current
I
CCQ
--
V
IN
= 0
--
200
400
mA
P
OUT
MAX (1)
--
V
CC
= 14.4V, max power
--
37
--
P
OUT
MAX (2)
--
V
CC
= 13.7V, max power
--
35
--
P
OUT
(1)
--
V
CC
= 14.4V, THD = 10%
--
24
--
Output power
P
OUT
(2)
--
THD = 10%
19
21
--
W
Total harmonic distortion
THD
--
P
OUT
= 3W
--
0.02
0.2
%
Voltage gain
G
V
--
V
OUT
= 0.775V
rms
(0dBm)
24 26 28 dB
Voltage gain ratio
G
V
--
V
OUT
= 0.775V
rms
(0dBm)
-1.0 0 1.0 dB
V
NO (1)
--
R
g
= 0, DIN45405
--
0.12
--
mV
rms
Output noise voltage
V
NO (2)
R
g
= 0,
BW = 20Hz~20kHz
-- 0.10 0.35
mV
rms
Ripple rejection ratio
R.R.
--
f
rip
= 100Hz, R
g
= 620
V
rip
= 0.775V
rms
(0dBm)
40 50 -- dB
Cross talk
C.T.
--
R
g
= 620,
V
OUT
= 0.775V
rms
(0dBm)
-- 65 -- dB
Output offset voltage
V
OFFSET
--
--
-100 0 +100
mV
Input resistance
R
IN
--
--
--
90
--
k
Stand
-by current
I
SB
--
Stand
-by condition
--
2
10
A
V
SB
H
--
Power: On
3.0
--
6.0
Stand
-by control
voltage
V
SB
L
--
Power: Off
0
--
1.5
V
V
M
H
--
Mute: Off
Open
Mute control voltage (*)
V
M
L
--
Mute: On, R
1
= 10k 0
--
0.5
V
Mute attenuation
ATT M
--
Mute: On
V
OUT
= 7.75V
rms
(20dBm)
at mute: Off.
80 90 -- dB
(*): Muting function have to be controlled by open and low logic, which logic is a transistor, FET and
-COM port of
I
MUTE
> 250A ability.
This means that the mute control terminal: Pin(24) must not be pulled
-up.
TA8252H
2002-10-30
9
Test Circuit
15
1
20
6
0.22F
C
1
IN1
TAB
V
CC1
V
CC2
OUT1(+)
OUT1(-)
GND1
+
-
+
-
17
18
19
R
L
C
5
3900
F
0.
1
F
C
3
14
0.22F
C
1
IN2
OUT2(+)
OUT2(-)
GND2
+
-
+
-
23
22
21
R
L
11
0.22F
C
1
IN3
OUT3(+)
OUT3(-)
GND3
+
-
+
-
9
8
7
R
L
12
0.22F
C
1
IN4
OUT4(+)
OUT4(-)
GND4
+
-
+
-
3
4
5
R
L
16
AUX IN
13
PRE-GND
10
2
25
24
10
F
C
2
10k
R
1
C
4
1
F
RIP
CLIP OUT
&
STBY DIAGNOSIS OUT MUTE
-
+
-
+
-
+
TA8252H
2002-10-30
10
THD P
OUT
Output power P
OUT
(W)
T
o
t
a
l
ha
rm
oni
c
di
st
or
ti
on
TH
D
(%
)
0.01
10
0.1
0.1
1 10
f =10kHz
100Hz
1kHz
VCC = 13.2 V
RL = 4
1ch Drive
THD P
OUT
Output power P
OUT
(W)
T
o
t
a
l
ha
rm
oni
c
di
st
or
ti
on
TH
D
(%
)
0.1
10
0.01
0.1
1 10
VCC = 9.0V
16.0V
13.2V
f = 1 kHz
RL = 4
1ch Drive
I
CCQ
V
CC
Power supply voltage V
CC
(V)
Qui
e
s
c
en
t
cu
rr
ent
I
CCQ
(m
A
)
1000
0
10
800
600
400
200
20 30
RL =
THD f
Frequency f (Hz)
T
o
t
a
l
ha
rm
oni
c
di
st
or
ti
on
TH
D
(%
)
0.01
1
10
0.1
100 1k 10k 100k
4ch
3ch
1ch
2ch
VCC = 13.2 V
RL = 4
POUT = 5 W
TA8252H
2002-10-30
11
V
NO
R
g
Signal source resistance R
g
()
Outp
ut noi
s
e
v
o
l
t
a
ge
V
NO
(V
rms
)
350
0
10
300
250
200
150
100
50
100 1k 10k 100k
VCC = 13.2 V
RL = 4
BW = ~20 k
G
V
f
Frequency f (Hz)
V
o
l
t
ag
e g
a
i
n
G
V
(dB
)
40
0
10
35
30
25
20
15
10
5
100 1k 10k 100k
VCC = 13.2 V
RL = 4
VOUT = 0.775 Vrms (0dBm)
R.R. f
Frequency f (Hz)
R
i
ppl
e
rej
e
cti
on
rati
o R
.
R
.
(
d
B
)
-10
-80
10
-20
-30
-40
-50
-60
-70
100 1k 10k 100k
OUT4
OUT1
OUT2
OUT3
VCC = 13.2 V
Vrip = 0.775 Vrms (0 dBm)
Rg = 620
RL = 4
C.T. f (OUT2)
Frequency f (Hz)
Cr
o
s
s
t
a
lk
C.T
.
(
d
B)
0
-10
-20
-30
-40
-50
-60
100 1k 10k 100k
-70
10
VCC = 13.2 V
VOUT = 0.775 Vrms (0 dBm)
Rg = 620
RL = 4
OUT1OUT2
OUT4OUT2
OUT3
OUT2
C.T. f (OUT1)
Frequency f (Hz)
Cr
o
s
s
t
a
lk
C.T
.
(
d
B)
0
-10
-20
-30
-40
-50
-60
100 1k 10k 100k
-70
10
OUT3OUT1
OUT2OUT1
OUT4
OUT1
VCC = 13.2 V
VOUT = 0.775 Vrms (0 dBm)
Rg = 620
RL = 4
P
OUT
f
Frequency f (Hz)
Outp
ut pow
er
P
OUT
(W
)
25
0
10
20
15
10
5
100 1k 10k 100k
THD = 10%
0.8%
VCC = 13.2V
RL = 4
TA8252H
2002-10-30
12
C.T. f (OUT3)
Frequency f (Hz)
Cr
o
s
s
t
a
lk
C.T
.
(
d
B)
0
-10
-20
-30
-40
-50
-60
100 1k 10k 100k
-70
10
VCC = 13.2 V
VOUT = 0.775 Vrms (0 dBm)
Rg = 620
RL = 4
OUT4OUT3
OUT2OUT3
OUT1OUT3
C.T. f (OUT4)
Frequency f (Hz)
Cr
o
s
s
t
a
lk
C.T
.
(
d
B)
0
-10
-20
-30
-40
-50
-60
100 1k 10k 100k
-70
10
VCC = 13.2 V
VOUT = 0.775 Vrms (0 dBm)
Rg = 620
RL = 4
OUT3OUT4
OUT2OUT4
OUT1OUT4
P
D
P
OUT
Output power P
OUT
/ch (W)
P
o
w
e
r
di
ssi
p
a
ti
on
P
D
(W
)
80
0
0
70
60
50
40
30
20
10
10 20 30 40 50 60
9V
13.2V
VCC = 18V
f = 1 kHz
RL = 4
P
D
MAX. Ta
Ambient temperature Ta (C)
A
l
l
o
w
abl
e p
o
w
e
r di
s
s
i
pati
o
n
P
D
MA
X
.
(W
)
140
0
0
120
100
80
60
40
20
25 50 75 100
125
150
(1) INFINITE HEAT SINK
RJC = 0.5 C/W
(2) HEAT
SINK
(RHS = 3.5 C/W)
RJC + RHS = 4 C/W
(3) NO HEAT SINK
RJA = 31 C/W
(1)
(2)
(3)
TA8252H
2002-10-30
13
Package Dimensions
Weight: 9.8g (typ.)
TA8252H
2002-10-30
14
TOSHIBA is continually working to improve the quality and reliability of its products. Nevertheless, semiconductor
devices in general can malfunction or fail due to their inherent electrical sensitivity and vulnerability to physical
stress. It is the responsibility of the buyer, when utilizing TOSHIBA products, to comply with the standards of
safety in making a safe design for the entire system, and to avoid situations in which a malfunction or failure of
such TOSHIBA products could cause loss of human life, bodily injury or damage to property.
In developing your designs, please ensure that TOSHIBA products are used within specified operating ranges as
set forth in the most recent TOSHIBA products specifications. Also, please keep in mind the precautions and
conditions set forth in the "Handling Guide for Semiconductor Devices," or "TOSHIBA Semiconductor Reliability
Handbook" etc..
The TOSHIBA products listed in this document are intended for usage in general electronics applications
(computer, personal equipment, office equipment, measuring equipment, industrial robotics, domestic appliances,
etc.). These TOSHIBA products are neither intended nor warranted for usage in equipment that requires
extraordinarily high quality and/or reliability or a malfunction or failure of which may cause loss of human life or
bodily injury ("Unintended Usage"). Unintended Usage include atomic energy control instruments, airplane or
spaceship instruments, transportation instruments, traffic signal instruments, combustion control instruments,
medical instruments, all types of safety devices, etc.. Unintended Usage of TOSHIBA products listed in this
document shall be made at the customer's own risk.
This product generates heat during normal operation. However, substandard performance or malfunction may
cause the product and its peripherals to reach abnormally high temperatures.
The product is often the final stage (the external output stage) of a circuit. Substandard performance or
malfunction of the destination device to which the circuit supplies output may cause damage to the circuit or to the
product.
The products described in this document are subject to the foreign exchange and foreign trade laws.
The information contained herein is presented only as a guide for the applications of our products. No
responsibility is assumed by TOSHIBA CORPORATION for any infringements of intellectual property or other
rights of the third parties which may result from its use. No license is granted by implication or otherwise under
any intellectual property or other rights of TOSHIBA CORPORATION or others.
The information contained herein is subject to change without notice.
000707EBF
RESTRICTIONS ON PRODUCT USE
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