TB2901HQ PDF Datasheet

Спецификация TB2901HQ изготовлена «Toshiba Semiconductor» и имеет функцию, называемую «4-ch Audio Power IC». На этой странице представлена подробная информация о характеристиках и технических характеристиках детали. Если вы правильно понимаете эти части, они могут помочь вам завершить ваши проекты и отремонтировать детали.

Детали детали

Номер произв	TB2901HQ
Описание	4-ch Audio Power IC
Производители	Toshiba Semiconductor
логотип

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TB2901HQ(O)

TOSHIBA Bi-CMOS Digital Integrated Circuit Silicon Monolithic

TB2901HQ

Maximum Power 47 W BTL × 4-ch Audio Power IC

The TB2901HQ 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.

www.DataSheet4UI.tcoismdesigned 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 Ω)

: 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 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 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 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.

Note 4: The protection circuit may operate not correctly in case of the use of large phase-shift type speaker.

Therefore, it should be confirmed that there is no problem on actual evaluation or mass-production board.

Especially, it is necessary to be ware such a behavior when the large phase-shift type 2ohm load, which is

a kind of sub-woofer for example, is connected to this IC, though such kind of speaker use is not

recommended.

1 2004-10-15

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Block Diagram

TB2901HQ(O)

www.DataSheet4U.com

1 20 6

TAB VCC1 VCC2

IN1

OUT1 (+)

PW-GND1 8

OUT1 (−)

IN2

OUT2 (+)

PW-GND2 2

OUT2 (−)

16 AC-GND

IN3

OUT3 (+)

PW-GND3 18

OUT3 (−)

IN4

PRE-GND

RIP

OUT4 (+)

PW-GND4 24

OUT4 (−)

STBY H-SW MUTE

4 25 22

PLAY

MUTE

: PRE-GND

: PW-GND

Note5: Some of the functional blocks, circuits, or constants in the block diagram may be omitted or simplified for

explanatory purpose.

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Caution and Application Method

(Description is made only on the single channel.)

TB2901HQ(O)

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.

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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 µA (typ.) in the standby state.

Control Voltage of Pin 4: VSB

Standby

OFF

Power

OFF

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 kΩ

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.

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TB2901HQ PDF Datasheet

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