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PDF TB2946HQ Data sheet ( Hoja de datos )
| Número de pieza | TB2946HQ | |
| Descripción | 49 W X 4-ch BTL Audio Power IC | |
| Fabricantes | Toshiiba | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de TB2946HQ (archivo pdf) en la parte inferior de esta página. Total 18 Páginas | ||
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TB2946HQ
TOSHIBA Bi-CMOS Linear Integrated Circuit Silicon Monolithic
TB2946HQ
49 W × 4-ch BTL Audio Power IC
The TB2946HQ is a four-channel BTL power amplifier for car
audio applications.
This IC has a pure complementary P-ch and N-ch DMOS output
stage, offering maximum output power (POUT MAX) of 49 W.
It includes a standby switch, mute function and various
protection features.
Features
• High output power
• POUT MAX (1) = 49 W (typ.)
(VCC = 15.2 V, f = 1 kHz, JEITA max, RL = 4 Ω)
Weight: 7.7 g (typ.)
• POUT MAX (2) = 43 W (typ.)
(VCC = 14.4 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) = 26 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)
• Low THD: 0.007% (typ.) (VCC = 13.2 V, f = 1 kHz, POUT = 5 W, RL = 4 Ω)
• Low noise: VNO = 60 μVrms (typ.)
www.DataSheet.co.kr
(VCC = 13.2 V, Rg = 0 Ω, BW = 20 Hz to 20 kHz, RL = 4 Ω)
• Standby switch (pin 4)
• Mute function (pin 22)
• Output DC offset detection (pin 25)
• Various protection features
Thermal overload; overvoltage; output short-circuits to GND, VCC and across the load; speaker current limiting
• Operating supply voltage : VCC (opr) = 8.0 to 18 V (RL = 4 Ω)
: VCC (opr) = 8.0 to 16 V (RL = 2 Ω)
Note 1: Install the device correctly. Otherwise, the device or system may be degraded, damaged or even destroyed.
Note 2:
The protection features are intended to avoid output short-circuits or other abnormal conditions temporarily. It
is not guaranteed that they will prevent the IC from being damaged.
Exposure to conditions beyond the guaranteed operating ranges may not activate the protection features,
resulting in an IC damage due to output short-circuits.
1 2009-01-29
Datasheet pdf - http://www.DataSheet4U.net/
1 page  
TB2946HQ
3. DC Offset Detection
The purpose of the integrated DC offset detector is to avoid an anomalous DC offset on the outputs,
produced by the input capacitor due to leakage current or short-circuit.
Vref
Elec. vol
Leakage current
or short-circuit
RS1
V
+
Positive DC offset (+)
(caused by RS1)
VCC/2 (normal DC voltage)
Negative DC offset (−)
(caused by RS2)
Vref/2
Vbias
−
25
5V
A
LPF
To a microcontroller
B The microcontroller shuts down the
system if the output is lower than
the specified voltage.
Figure 5 DC Offset Detection Mechanism
Amp output
GND
Voltage at (A)
(pin 25)
GND
Voltage at (B)
(LPF output)
GND
www.DataSheet.co.kr
RS2
OUT(-)
VCC/2
Offset detection
threshold voltage
OUT(+)
Time
Time
Time
5 2009-01-29
Datasheet pdf - http://www.DataSheet4U.net/
5 Page 
TB2946HQ
100
VCC = 13.2 V
50 RL = 4 Ω
THD – POUT (ch1)
30 f = 1 kHz
Filter
400 Hz to 30 kHz
10
5
3
VCC = 8 V
1
0.5
0.3
13.2 V
16 V
0.1
0.05
0.03
0.01
0.005
0.003
0.001
0.1
0.3 0.5 1
3 5 10
30 50 100
Output power POUT (W)
100
VCC = 13.2 V
50 RL = 4 Ω
THD – POUT (ch2)
30 f = 1 kHz
Filter
400 Hz to 30 kHz
10
5
3
VCC = 8 V
1
0.5
0.3
13.2 V
16 V
0.1
0.05
0.03
0.01
0.005
0.003
0.001
0.1
0.3 0.5 1
3 5 10
30 50 100
Output power POUT (W)
THD – POUT (ch3)
100
VCC = 13.2 V
50 RL = 4 Ω
30 f = 1 kHz
Filter
400 Hz to 30 kHz
10
5
3
VCC = 8 V
1
0.5
0.3
13.2 V
16 V
0.1
0.05
0.03
0.01
0.005
0.003
0.001
0.1
0.3 0.5 1
3 5 10
30 50 100
Output power POUT (W)
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THD – POUT (ch4)
100
VCC = 13.2 V
50 RL = 4 Ω
30 f = 1 kHz
Filter
400 Hz to 30 kHz
10
5
3
VCC = 8 V
1
0.5
0.3
13.2 V
16 V
0.1
0.05
0.03
0.01
0.005
0.003
0.001
0.1
0.3 0.5 1
3 5 10
30 50 100
Output power POUT (W)
11
2009-01-29
Datasheet pdf - http://www.DataSheet4U.net/
11 Page | ||
| Páginas | Total 18 Páginas | |
| PDF Descargar | [ Datasheet TB2946HQ.PDF ] | |
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