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Номер произв TB2922HQ
Описание Dual Audio Power Amplifier
Производители Toshiba Semiconductor
логотип Toshiba Semiconductor логотип 



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TB2922HQ Даташит, Описание, Даташиты
TB2922HQ
TOSHIBA Bi-CMOS Digital Integrated Circuit Silicon Monolithic
TB2922HQ
Dual Audio Power Amplifier
The TB2922HQ is 2ch BTL audio amplifier for TV or home audio
applications.
It includes and the pure complementary P-ch and N-ch DMOS
output stage.
www.DataSheet4UT.choempackage is CPP (Compact Power Package).
It is built-in standby function, muting function various kinds of
protectors.
Weight: 4.04 g (typ.)
Features
High power output
: POUT (1)= 22 W (typ)
(VCC = 18V, RL = 8 Ω, f = 1 kHz, THD = 10%)
: POUT (2)= 37W (typ)
(VCC = 16V, RL = 4 Ω, f = 1 kHz, THD = 10%)
: POUT (3)= 46W (typ)
(VCC = 26V, RL = 8 Ω, f = 1 kHz, THD = 10%)
: POUTMAX (1)= 72W (typ)
(VCC = 26V, RL = 8 Ω, f = 1 kHz, ax Power)
Low distortion ratio : THD=0.02(typ)
Low noise
: Vno = 0.16 μVrms (typ)
(VCC = 18V, RL = 8 Ω, Rg = 0 Ω, BW = 20 Hz~20 kHz)
Low outside parts
Built-in standby switch function (pin 1)
Built-in muting function (pin 6)
Built-in various protection circuits:
Thermal shut down, overvoltage, out to GND, out to VCC, out to out short speaker burned
Operating supply voltage
: VCC (opr) = 9 to 26 V (RL = 8 Ω)
: VCC (opr) = 9 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.
Note 3: If HBM ESD(condition; 100pF/1.5kΩ) of under -1900V is applied to pin 2 or pin 4 in case that pin3 is GND,
this product may break down.
1 2007-02-20









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TB2922HQ Даташит, Описание, Даташиты
Block Diagram
TB2922HQ
www.DataSheet4U.com
IN1
4
C1
IN2
2
C1
7
VCC2
OUT1 (+)
8
OUT1 ()
9
OUT2 (+)
12
OUT2 ()
11
PRE-GND
3
RIP STBY PW-GND MUTE
51
10 6
R1
R2
RL
RL
5V
PLAY
MUTE
: PRE-GND
: PW-GND
Some of the functional blocks, circuits, or constants in the block diagram may be omitted or simplified for
explanatory purpose.
2 2007-02-20









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TB2922HQ Даташит, Описание, Даташиты
TB2922HQ
Caution and Application Method (Description is made only on the single channel)
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
www.DataSheet4U.com
Amp. 2B
Figure 1 Block Diagram
The voltage gain of amp.1
: GV1 = 8dB
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) = 8 + 20 + 6 = 34dB
2. Standby SW Function (pin 1)
By means of controlling pin 1 (standby pin) to
High and Low, the power supply can be set to ON
and OFF. The threshold voltage of pin 1 is set at
about 3 VBE (typ.), and the power supply current is
about 2 μA (typ.) in the standby state.
Control Voltage of Pin 4: VSB
Stand-by
ON
OFF
Power
OFF
ON
VSB (V)
0 to 0.5
2.5 to 6
When changing the time constant of pin 1, check the
pop noise.
ON Power
OFF
10 kΩ
1
VCC
2 VBE
to BIAS
CUTTING CIRCUIT
Figure 2 With pin 1 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 2007-02-20










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