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PDF TB2903HQ Data sheet ( Hoja de datos )
| Número de pieza | TB2903HQ | |
| Descripción | Maximum Power 47 W BTL x 4-Ch Audio Power IC | |
| Fabricantes | Toshiba | |
| Logotipo |  |
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TOSHIBA Bi-CMOS Digital Integrated Circuit Silicon Monolithic
TB2903HQ
TB2903HQ
Maximum Power 47 W BTL × 4-ch Audio Power IC
The TB2903HQ is 4-ch BTL audio amplifier for car audio
applications.
This IC can generate higher power: POUT MAX = 47 W as it
includes the pure complementary P-ch and N-ch DMOS output
stage.
It is designed to yield low distortion ratio for 4-ch BTL audio
power amplifier, built-in standby function, muting function, and
various kinds of protectors.
Additionally, Off-set detector is built in.
Features
Weight: 7.7 g (typ.)
• High power output
: POUT MAX (1) = 47 W (typ.)
(VCC = 14.4 V, f = 1 kHz, JEITA max, RL = 4 Ω)
: POUT MAX (2) = 43 W (typ.)
(VCC = 13.7 V, f = 1 kHz, JEITA max, RL = 4 Ω)
: POUT (1) = 29 W (typ.)
(VCC = 14.4 V, f = 1 kHz, THD = 10%, RL = 4 Ω)
: POUT (2) = 25 W (typ.)
(VCC = 13.2 V, f = 1 kHz, THD = 10%, RL = 4 Ω)
• 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~20 kHz, RL = 4 Ω)
• Built-in standby switch function (pin 4)
• Built-in muting function (pin 22)
• Built-in Off-set detection function (pin 25)
• Built-in various protection circuits:
Thermal shut down, overvoltage, out to GND, out to VCC, out to out short
• Operating supply voltage: VCC (opr) = 9~18 V (RL = 4 Ω)
Note 1: Since this device’s pins have a low withstanding voltage, please handle it with care.
Note 2: Install the product correctly. Otherwise, it may result in break down, damage and/or degradation to the
product or equipment.
Note 3:
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 2004-07-25
1 page  
TB2903HQ
4. Off-set detection function
In case of Appearing output offset voltage by Generating a Large Leakage Current on the input
Capacitor etc.
Vref
Elec. vol
Leak or short
RS1
Vref/2
Vbias
V DC Voltage (+) Amp (at leak) (RS1)
VCC/2 (normal DC voltage)
DC Voltage (−) Amp (at short) (RS2)
+
Offset voltage (at leak or short)
5V
−
25
A
L.P.F.
To CPU
B
Figure 6 Application and Detection Mechanism
(+) Amp output
GND
Voltage of
point (A)
GND
Voltage of
point (B)
GND
Threshold level (RS1)
VCC/2
Threshold level (RS2)
t
t
RS2
Figure 7 Wave Form
t
5 2004-07-25
5 Page 
0
VCC = 13.2 V
−20 RL = 4 Ω
VOUT = 20dBm
−40
muteATT – f
−60
−80
−100
1 ch ~4ch
−120
10
100 1 k 10 k
frequency f (Hz)
100 k
TB2903HQ
0
VCC = 13.2 V
RL = 4 Ω
−20 RG = 620 Ω
Vrip =0dBm
R.R. – f
−40
4ch
−60 1ch
3ch 2ch
−80
10 100 1 k 10 k
frequency f (Hz)
100 k
GV – f
40
30
1 ch ~4ch
20
10 VCC = 13.2 V
RL = 4 Ω
VOUT = 0dBm
0
10 100 1 k 10 k 100 k
frequency f (Hz)
3
VCC = 13.2 V
1 RL = 4 Ω
POUT = 5 W
0.3 No filter
THD – f
0.1
0.03
0.01
0.003
4ch 2ch
3ch
1ch
0.001
10 100 1 k 10 k
frequency f (Hz)
100 k
11 2004-07-25
11 Page | ||
| Páginas | Total 15 Páginas | |
| PDF Descargar | [ Datasheet TB2903HQ.PDF ] | |
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