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PDF TB2902HQ Data sheet ( Hoja de datos )
| Número de pieza | TB2902HQ | |
| Descripción | 4-ch Audio Power IC | |
| Fabricantes | Toshiba Semiconductor | |
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TOSHIBA Bi-CMOS Digital Integrated Circuit Silicon Monolithic
TB2902HQ
TB2902HQ
Maximum Power 41 W BTL × 4-ch Audio Power IC
The TB2902HQ is 4ch audio amplifier for car audio application.
This IC can generate high power, high quality sound output,
POUT MAX = 41 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 I2C BUS.
www.DataSheet4UI.ncoamddition, stand-by and mute function, and various
Protection feature are included.
Features
• High power output
: POUT MAX (1) = 41 W (typ.)
(VCC = 14.4 V, f = 1 kHz, JEITA max, RL = 4 Ω)
: POUT MAX (2) = 37 W (typ.)
(VCC = 13.7 V, f = 1 kHz, JEITA max, RL = 4 Ω)
: POUT MAX (3) = 70 W (typ.)
(VCC = 14.4 V, f = 1 kHz, JEITA max, RL = 2 Ω)
: POUT (1) = 27 W (typ.)
(VCC = 14.4 V, f = 1 kHz, THD = 10%, RL = 4 Ω)
: POUT (2) = 23 W (typ.)
(VCC = 13.2 V, f = 1 kHz, THD = 10%, RL = 4 Ω)
: POUT (3) = 45 W (typ.)
(VCC = 14.4 V, f = 1 kHz, THD = 10%, RL = 2 Ω)
Weight: 7.7 g (typ.)
• Low distortion ratio: THD = 0.015% (typ.)
(VCC = 13.2 V, f = 1 kHz, POUT = 5 W, RL = 4 Ω)
• Low noise: VNO = 90 µVrms (typ.)
(VCC = 13.2 V, Rg = 0 Ω, BW = 20 Hz to 20 kHz, RL = 4 Ω)
• Built in stand by & muting function: controlled via I2C Bus (pin 16)
• Built in clipping detection (pin 4)
• Built in I2C 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 VCC, out to out short circuit
• Operating supply voltage: VCC (opr) = 9 to 18 V (RL = 4 Ω)
VCC (opr) = 9 to 16 V (RL = 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.
1 2004-08-18
1 page  
4. External Component Values
TB2902HQ
Component Recommended
Name
Value
Purpose
C1 0.22 µF To eliminate DC
Effect
Lower than Recommended Higher than Recommended
Value
Value
Cut-off frequency becomes Cut-off frequency becomes
higher
lower
Notes
Pop noise is
concerned with
this capacitor.
To reduce ripple
C2
10 µF
To determine the Power ON/OFF time and turn Power ON/OFF time and turn
time of turn on
ON diag cycle shorter
ON diag cycle longer
diag
C3
www.DataSheet4U.com
0.1 µF
To provide
sufficient
Reduces noise and provides sufficient oscillation margin
oscillation margin
C4
1 µF
To reduce pop
noise
Pop noise becomes larger
Muting ON/OFF time is
shorter
Pop noise becomes smaller
Muting ON/OFF time is
longer
C5
3900 µF Ripple filter
Power supply ripple filtering
Note 3: In case of the recommended value not used.
5. Fast Mute Mode
This feature will normally be used to suppress pop noise resulting from VCC transients during engine
cranking condition.
The fast mute mode can be entered on receipt of a command via I2C bus.
Using the IB2 register and setting to ‘one’ the bit D6, it is possible to generate a fast I2C mute command.
If a fast mute command is received, this IC will operate and will discharge the capacitor C4 at pin16.
Therefore the Pop sound will be reduced compared to the condition when Fast Mute is not used in the
engine cranking condition.
5 2004-08-18
5 Page 
B) Repetition mode
Maximum interval:
You can select the acquisition time.
Minimum interval:
It is determined by the speed of microcomputer.
Writing
(diag cycle enable = 1)
(stand by OFF = 0)
Reading 1
Reading 3
Reading 5
Reading 2
Reading 4
I2C command
www.DataSheet4U.com
Pin 10
DB1 D6
(acquisition time with only turn-ON)
Diag enable
About 100 ms
About 80 ms
About 80 ms
TB2902HQ
Reading 6
Fault event
Latch
The turn ON diagnostic acquisition time is determined by the ripple filter capacitance C2 and
the equivalent internal resistance Rr as below expression.
Acquisition time = 2 × C2 × Rr = 4400 × C2 (typ.)
Rr is fixed in internal circuit and it is not varied by the fluctuation of power supply VCC voltage.
C2 value determines the time from power ON (standby off) to the appearance of sound signal
from output and the characteristic for ripple rejection ratio, too. So, take care with the decision on
C2 value.
If the turn ON diagnosis is not used, in other words the diagnostic cycle defeat command is sent,
the waveform of ripple terminal voltage will change but the time from turning on to the output
signal appearance will not change as illustrated below in Figure 6.
WRITE DATA
Pin10
ripple
pin
voltage
Turn ON diagnosis enable
Turn ON diagnosis defeat
Figure 6 Turn on Diagnosis Timing Chart when Turn on diagnosis not used.
11 2004-08-18
11 Page | ||
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| PDF Descargar | [ Datasheet TB2902HQ.PDF ] | |
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