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PDF TB2923HQ Data sheet ( Hoja de datos )
| Número de pieza | TB2923HQ | |
| Descripción | 50 W X 4-ch BTL Audio Power IC | |
| Fabricantes | Toshiba | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de TB2923HQ (archivo pdf) en la parte inferior de esta página. Total 17 Páginas | ||
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TB2923HQ
TOSHIBA Bi-CMOS Linear Integrated Circuit Silicon Monolithic
TB2923HQ
50 W × 4-ch BTL Audio Power IC
The TB2923HQ 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 50 W.
It includes a standby switch, mute function and various
protection features.
Features
• High output power
• POUT MAX (1) = 50 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 = 13.7 V, f = 1 kHz, JEITA max, RL = 4 Ω)
• POUT MAX (3) = 80 W (typ.)
(VCC = 14.4 V, f = 1 kHz, JEITA max, RL = 2 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 THD: 0.005% (typ.) (VCC = 13.2 V, f = 1 kHz, POUT = 5 W, RL = 4 Ω)
• Low noise: VNO = 50 µVrms (typ.)
(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)
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.
www.DataSheet4U.com
1 2006-11-30
1 page  
TB2923HQ
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
Vref/2
Vbias
V
+
5V
−
25
A
LPF
Positive DC offset (+)
(caused by RS1)
VCC/2 (normal DC voltage)
Negative DC offset (−)
(caused by RS2)
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
OUT(+)
VCC/2
Offset detection
threshold (RS2)
OUT(-)
Time
Time
Time
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5 2006-11-30
5 Page 
100
VCC = 13.2 V
50 RL = 4 Ω
THD – POUT (ch1)
30 f = 1 kHz
Filter
400 Hz to 30 kHz
10
13.2 V
5
3
VCC = 9 V
16 V
1
0.5
0.3
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)
TB2923HQ
100
VCC = 13.2 V
50 RL = 4 Ω
THD – POUT (ch2)
30 f = 1 kHz
Filter
400 Hz to 30 kHz
10
13.2 V
5
3
VCC = 9 V
16 V
1
0.5
0.3
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 (ch3)
30 f = 1 kHz
Filter
400 Hz to 30 kHz
10
13.2 V
5
3
VCC = 9 V
16 V
1
0.5
0.3
0.1
0.05
0.03
0.01
www.DataSh0e.0e0t54U.com
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 (ch4)
30 f = 1 kHz
Filter
400 Hz to 30 kHz
10
13.2 V
5
3
VCC = 9 V
16 V
1
0.5
0.3
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 2006-11-30
11 Page | ||
| Páginas | Total 17 Páginas | |
| PDF Descargar | [ Datasheet TB2923HQ.PDF ] | |
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