TB2932HQ
TOSHIBA Bi-CMOS Linear Integrated Circuit
TB2932HQ
Silicon Monolithic
Maximum Power 49 W BTL
×
4-ch Audio Power IC
The TB2932HQ is 4ch audio amplifier for car audio application.
This IC can generate high power, high quality sound output,
P
OUT
MAX = 49 W, using a pure complementary P-ch and N-ch
DMOS output stage.
The built-in self diagnosis function which is included can be
controlled via I
2
C BUS.
In addition, stand-by and mute function, and various protection
feature are included.
Features
•
High power output
: P
OUT
MAX (1)
=
49 W (typ.)
(V
CC
=
15.2 V, f
=
1 kHz, JEITA max, R
L
=
4
Ω)
: P
OUT
MAX (2)
=
43 W (typ.)
(V
CC
=
14.4 V, f
=
1 kHz, JEITA max, R
L
=
4
Ω)
: P
OUT
MAX (3)
=
70 W (typ.)
(V
CC
=
14.4 V, f
=
1 kHz, JEITA max, R
L
=
2
Ω)
: P
OUT
(1)
=
27 W (typ.)
(V
CC
=
14.4 V, f
=
1 kHz, THD
=
10%, R
L
=
4
Ω)
: P
OUT
(2)
=
23 W (typ.)
(V
CC
=
13.2 V, f
=
1 kHz, THD
=
10%, R
L
=
4
Ω)
: P
OUT
(3)
=
45 W (typ.)
(V
CC
=
14.4 V, f
=
1 kHz, THD
=
10%, R
L
=
2
Ω)
Low distortion ratio:
THD = 0.007% (typ.)
(V
CC
=
13.2 V, f
=
1 kHz, P
OUT
=
5 W, R
L
=
4
Ω)
Low noise: V
NO
=
60
μVrms
(typ.)
(V
CC
=
13.2 V, R
g
=
0
Ω,
BW
=
20 Hz to 20 kHz, R
L
=
4
Ω)
Built in stand by & muting function: controlled via I
2
C Bus (26/12dB)
Built in clipping detection (pin 4)
Weight: 7.7 g (typ.)
•
•
•
•
•
•
•
Built in I
2
C Bus for stand-by, mute, voltage gain control, self diagnosis: Output short detection, offset detection,
tweeter or speaker open detection (pin 22 and 25)
Built-in various protection circuits (Note 1, Note 2)
Thermal shut down, over-voltage, out to GND, out to V
CC
, out to out short circuit
Operating supply voltage: V
CC (opr)
=
8 to 18 V (R
L
=
4
Ω)
V
CC (opr)
=
8 to 16 V (R
L
=
2
Ω)
Note 1: Install the product correctly. Otherwise, it may result in break down, damage and/or degradation to the
product or equipment.
Note 2: These protection functions are intended to avoid some output short circuits or other abnormal conditions
temporarily. These protect functions do not warrant to prevent the IC from being damaged.
- In case of the product would be operated with exceeded guaranteed operating ranges, these protection
features may not operate and some output short circuits may result in the IC being damaged.
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2009-02-02
TB2932HQ
Block Diagram
3900
μF
10
μF
0.1
μF
C5
C2
10
Ripple
1
TAB
6
V
CC2
20
V
CC1
9
8
7
0.22
μF
C1
11
IN1
Out1 (+)
LF
PW-GND1
Out1 (−)
RL
=
4
Ω
0.22
μF
C1
12
IN2
5
2
3
Out2 (+)
LR
PW-GND2
Out2 (−)
RL
=
4
Ω
0.22
μF
C1
15
IN3
17
18
19
Out3 (+)
RF
PW-GND3
Out3 (−)
RL
=
4
Ω
13 Pre-GND
0.22
μF
C1
14
IN4
21
24
Out4 (+)
RR
PW-GND4
Out4 (−)
RL
=
4
Ω
1
μF
16 AC-GND
C4
23
22
SW
47 kΩ
LPF
4 Clip detection/
startup circuit.
IC
Bus
Diagnosis
2
SCL
SDA
25
Some of the functional blocks, circuits, or constants labels in the block diagram may have been omitted or
simplified for clarity.
C3
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2009-02-02
TB2932HQ
Caution and Application Information (description is made referring only on the single
channel.)
1.Clip Detection
The output clip detection terminal, pin 4, has an open collector output structure on chip as shown in
Figure 3. In the case when the output waveform is clipping, the clip detection circuit is operated and the
NPN Tr. is turned on.
It is possible to improve the audio output quality by controlling the volume and/or tone control circuits
through a low pass filter (L.P.F.) smoothing circuit as shown in Figure 1.
The sensitivity of the circuit to clipping level can be selected T.H.D.
=
1% or 10% via I
2
C bus.
In the event that this function is not used, pin4 should be left open circuit.
4
L.P.F.
smoothing
circuit
Volume control circuit
Clip detector
Tone control circuit
Output AC
waveform
Internal detection
circuit
Clip Det. 5 V
output
GND
Waveform L.P.F
output
Figure 1
Clip Detection
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2009-02-02
TB2932HQ
2.
External Component Values
Effect
Purpose
Lower than Recommended
Value
Cut-off frequency becomes
higher
Higher than Recommended
Value
Cut-off frequency becomes
lower
Notes
Component Recommended
Name
Value
C1
0.22
μF
To eliminate DC
To reduce ripple
C2
10
μF
To determine the
time of turn on
diag
To provide
sufficient
oscillation margin
Common
reference voltage
for all input
Ripple filter
Power ON/OFF time and turn Power ON/OFF time and turn
ON diag cycle shorter
ON diag cycle longer
Pop noise is
concerned with
this capacitor.
C3
0.1
μF
Reduces noise and provides sufficient oscillation margin
C4
1.0
μF
3900
μF
Pop noise is suppressed when C1: C4
=
1:4.
Power supply ripple filtering
C5
Note 3: In case of the recommended value not used.
3.Fast Mute Mode
This feature will normally be used to suppress pop noise resulting from V
CC
transients during engine
cranking condition.
The fast mute mode can be entered on receipt of a command via I
2
C bus.
Using the IB2 register and setting to ‘one’ the bit D6, it is possible to generate a fast I
2
C mute command.
If a fast mute command is received, this IC will operate and will discharge the built-in capacitor .
Therefore the Pop sound will be reduced compared to the condition when Fast Mute is not used in the
engine cranking condition.
4.IC start up procedure
As for this product, to decrease an quiescent current with the stand-by state, the I
2
C BUS communication
possible condition and the simple condition in case of the turning on exist.
Please confirm of the request the following contents in the limit of the set design.
1) The hardware stand-by state
It doesn't impress the external voltage (5V / 3.3V) and it says the time when the Ripple voltage potential is
large to the ClipDet terminal (4 pins).In case of this condition, it becomes Istby=0.
2) The software stand-by state
When impressing the external voltage (5V / 3.3V) on the ClipDet terminal (4 pins), the internal reference of
VDD amplifier starts-up, it becomes I
2
C BUS communication will possible condition.
In case of this condition, it becomes Istby=30uA.
3) The IC operation condition
In I
2
C BUS command (Stby L→H), when sending by the Write command, the charging by the Ripple voltage
(terminal) begins after the switchover to the condition of the above 2).
When the Ripple voltage(terminal) reaches the value of the wish by this, it becomes an IC operation condition.
Therefore, before communicating in I
2
C BUS, it impresses voltage on the ClipDet terminal once and VDD must
be started.
VDD stands up and after the I
2
C BUS communication becomes possible, because this terminal functions as the
ClipDet terminal, only in IC start-up, it requests sequence setting to impress potential.
Incidentally, because it touches much more by the separate section about the conduct of the ClipDet terminal, .
*:
Add start-up voltage (5.0V / 3.3V) through limitation resistance (10k typ.).
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2009-02-02
TB2932HQ
5.Explanation for Self Diagnosis Via I
2
C
Bus map
【Slave
Address】
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
0
1
1
1
0
1
1
0
0
⎯
Write Mode
Read Mode
D8H
Details
Hex
【WRITE】
•
Bit7
0
1
⎯
⎯
0
0
0
0
0
0
0
0
0
0
0
1
1
0
Sub address
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
Details
Page Mode (auto increment) OFF
Page Mode (auto increment) ON
Control Byte1
Control Byte2
01H
02H
Hex
•
Bit7
0
0
0
0
0
0
0
1
Control byte1 (01H)
Bit6
0
0
0
0
0
0
1
⎯
Bit5
0
0
0
0
0
1
0
⎯
Bit4
0
0
0
0
1
0
0
⎯
Bit3
0
0
0
1
0
0
0
⎯
Bit2
0
0
1
0
0
0
0
⎯
Bit1
0
1
0
0
0
0
0
⎯
Bit0
1
0
0
0
0
0
0
⎯
Function
Clip Det 1% to 10% change
Rch Muting off (play)
Fch Muting off (play)
Rch Gain 26dB to 12dB
Fch Gain 26dB to 12dB
Offset Det Enable
Diag Cycle Enable
Turn-on Select (normal/repeatedly)
•
Bit7
0
0
0
0
0
0
⎯
1
Control byte2 (02H)
Bit6
0
0
0
0
0
0
1
0
Bit5
0
0
0
0
0
1
⎯
0
Bit4
0
0
0
0
1
0
⎯
0
Bit3
0
0
0
1
0
0
⎯
0
Bit2
0
0
1
0
0
0
⎯
0
Bit1
0
1
0
0
0
0
⎯
0
Bit0
1
0
0
0
0
0
⎯
0
Rare short DET
Soft Mute delay time (40ms/20ms)
Current Detection Enable
Line Drive Diag
Stand By OFF (play)
Clip Det Pin change to Offset Det
Fast mute ON/OFF
Current Detection. Level change from 500 mA
(max) to 300 mA (max)
Function
Note 4: Self mute circuit is included on chip and is in independent from I
2
C bus stage.
Self mute operating voltage is V
CC
=
7.6 V(rise),7.3V(falls)
Note 5: Auto Increment is available.
If control byte 1 is chosen by sub address, it is not necessary to send byte 2 in cases when both byte 1 and
2 are to be written.
Ex) In case of sub address
=
byte1 chosen:
Sub address byte 1
→
byte 1 writing
→
Sub address byte 2
→
byte 2 writing: available
Sub address byte 1
→
byte 1 writing ----------------------------
→
byte 2 writing: available
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2009-02-02
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