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Номер произв TB2901H
Описание Maximum Power 47 W BTL x 4-ch Audio Power IC
Производители Toshiba Semiconductor
логотип Toshiba Semiconductor логотип 



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TB2901H Даташит, Описание, Даташиты
TOSHIBA Bi-CMOS Digital Integrated Circuit Silicon Monolithic
TB2901H
Maximum Power 47 W BTL × 4-ch Audio Power IC
TB2901H
The TB2901H 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, high-side switch 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 )
: POUT MAX (2) = 43 W (typ.)
(VCC = 13.7 V, f = 1 kHz, JEITA max, RL = 4 )
: POUT MAX (3) = 80 W (typ.)
(VCC = 14.4 V, f = 1 kHz, JEITA max, RL = 2 )
: POUT (1) = 29 W (typ.)
(VCC = 14.4 V, f = 1 kHz, THD = 10%, RL = 4 )
: POUT (2) = 25 W (typ.)
(VCC = 13.2 V, f = 1 kHz, THD = 10%, RL = 4 )
: POUT (3) = 55 W (typ.)
(VCC = 14.4 V, f = 1 kHz, THD = 10%, RL = 2 )
· Low distortion ratio: THD = 0.015% (typ.)
(VCC = 13.2 V, f = 1 kHz, POUT = 5 W, RL = 4 )
· Low noise: VNO = 90 µVrms (typ.)
(VCC = 13.2 V, Rg = 0 , BW = 20 Hz~20 kHz, RL = 4 )
· Built-in standby switch function (pin 4)
· Built-in muting function (pin 22)
· Built-in high-side switch 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 )
Note 1: Since this device’s pins have a low withstanding voltage, please handle it with care.
1 2002-11-06









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TB2901H Даташит, Описание, Даташиты
Block Diagram
TB2901H
1 20 6
TAB VCC1 VCC2
IN1
11
C1
OUT1 (+)
9
PW-GND1 8
OUT1 (-)
7
IN2
12
C1
OUT2 (+)
5
PW-GND2 2
OUT2 (-)
3
16 AC-GND
C6
IN3
15
C1
OUT3 (+)
17
PW-GND3 18
OUT3 (-)
19
IN4
14
C1
PRE-GND
13
OUT4 (+)
21
PW-GND4 24
OUT4 (-)
23
RIP STBY H-SW MUTE
10 4
25 22
R1
RL
RL
RL
RL
5V
PLAY
MUTE
: PRE-GND
: PW-GND
2 2002-11-06









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TB2901H Даташит, Описание, Даташиты
Caution and Application Method
(Description is made only on the single channel.)
TB2901H
1. Voltage Gain Adjustment
This IC has no NF (negative feedback) Pins. Therefore, the voltage gain can not be adjusted, but it makes
the device a space and total costs saver.
Input
Amp. 1
Amp. 2A
Amp. 2B
Figure 1 Block Diagram
The voltage gain of amp.1
: GV1 = 0dB
The voltage gain of amp.2A, B
: GV2 = 20dB
The voltage gain of BTL connection: GV (BTL) = 6dB
Therefore, the total voltage gain is decided by expression below.
GV = GV1 + GV2 + GV (BTL) = 0 + 20 + 6 = 26dB
2. Standby SW Function (pin 4)
By means of controlling pin 4 (standby pin) to
High and Low, the power supply can be set to ON
and OFF. The threshold voltage of pin 4 is set at
about 3VBE (typ.), and the power supply current is
about 2 mA (typ.) in the standby state.
Control Voltage of Pin 4: VSB
Standby
ON
OFF
Power
OFF
ON
VSB (V)
0~1.5
3.5~6 V
When changing the time constant of pin 4, check the
pop noise.
ON Power
OFF
10 kW
4
VCC
» 2 VBE
to BIAS
CUTTING CIRCUIT
Figure 2 With pin 4 set to High,
Power is turned ON
Advantage of Standby SW
(1) Since VCC can directly be controlled to ON or OFF by the microcomputer, the switching relay can be
omitted.
(2) Since the control current is microscopic, the switching relay of small current capacity is satisfactory
for switching.
3 2002-11-06










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