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PDF TB2921AHQ Data sheet ( Hoja de datos )
| Número de pieza | TB2921AHQ | |
| Descripción | 51W x 4-ch BTL Audio Power IC | |
| Fabricantes | Toshiba | |
| Logotipo |  |
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TB2921AHQ
TOSHIBA Bi-CMOS Linear Integrated Circuit Silicon Monolithic
TB2921AHQ
51 W × 4-ch BTL Audio Power IC
The TB2921AHQ 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 5１ W.
It includes a standby switch, mute function, a high-side switch
and various protection features.
Features
• High output power
• POUT MAX (1) = 51 W (typ.)
(VCC = 15.2 V, f = 1 kHz, JEITA max, RL = 4 Ω)
Weight: 7.7 g (typ.)
• POUT MAX (2) = 45 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 = 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 THD: 0.005% (typ.) (VCC = 13.2 V, f = 1 kHz, POUT = 5 W, RL = 4 Ω)
• Low noise: VNO = 55 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)
• High-side switch (H-SW) (pin 25)
• Various protection features
Thermal overload; overvoltage; output short-circuits to GND, VCC and across the load
• 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.
Note 3: The protection circuit may malfunction depending on the connected speaker type due to a phase shift. The
operation of the device should therefore be verified by actually connecting a speaker to its outputs. It is not
recommended to connect a 2-ohm load such as a subwoofer that induces a significant phase shift, and that
special care should be taken in such cases.
1 2009-02-03
1 page  
TB2921AHQ
4. DC Offset Detection
It is possible to use this function by setting the voltage of Pin 22 higher than 8V.
In case of Appearing output offset voltage by Generating a Large Leakage Current on the input Capacitor etc.
Vref
Elec. vol
Leakage current
or short-circuit
RS1
Vref/2
Vbias
V
+
−
25
A
Positive DC offset (+)
(caused by RS1)
VCC/2 (normal DC voltage)
Negative DC offset (−)
(caused by RS2)
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
Out(+)
VCC/2
Offset detection
threshold voltage
Out(-)
Time
Time
Time
5 2009-02-03
5 Page 
THD – POUT (ch1)
100
VCC = 13.2 V
50 RL = 4 Ω
30
Signal is applied on
the channel under
measurement only.
Filter
10 400 Hz to 30 kHz
5
3
VCC = 9 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)
TB2921AHQ
THD – POUT (ch2)
100
VCC = 13.2 V
50 RL = 4 Ω
30
Signal is applied on
the channel under
measurement only.
Filter
10 400 Hz to 30 kHz
5
3
VCC = 9 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
Signal is applied on
the channel under
measurement only.
Filter
10 400 Hz to 30 kHz
5
3
VCC = 9 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 (ch4)
100
VCC = 13.2 V
50 RL = 4 Ω
30
Signal is applied on
the channel under
measurement only.
Filter
10 400 Hz to 30 kHz
5
3
VCC = 9 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 2009-02-03
11 Page | ||
| Páginas | Total 17 Páginas | |
| PDF Descargar | [ Datasheet TB2921AHQ.PDF ] | |
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