參數(shù)資料
型號(hào)： TB2922HQ
廠商： Toshiba Corporation
英文描述： Dual Audio Power Amplifier
中文描述： 雙音頻功率放大器
文件頁(yè)數(shù)： 3/15頁(yè)
文件大?。?/td> 256K
代理商： TB2922HQ
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.
Amp. 1
Input
Amp. 2A
Amp. 2B
Figure 1 Block Diagram
The voltage gain of amp.1
The voltage gain of amp.2A, B
The voltage gain of BTL connection G
V (BTL)
=
6dB
Therefore, the total voltage gain is decided by expression below.
G
V
=
G
V1
+
G
V2
+
G
V (BTL)
=
8
+
20
+
6
=
34dB
: G
V1
=
8dB
: G
V2
=
20dB
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 V
BE
(typ.), and the power supply current is
about 2
μ
A (typ.) in the standby state.
Figure 2 With pin 1 set to High,
Power is turned ON
ON
1
OFF
10 k
Ω
to BIAS
CUTTING CIRCUIT
≈
2 V
BE
V
CC
Power
Control Voltage of Pin 4: V
SB
Stand-by
Power
V
SB
(V)
ON
OFF
0 to 0.5
OFF
ON
2.5 to 6
When changing the time constant of pin 1, check the
pop noise.
Advantage of Standby SW
(1)
Since V
CC
can directly be controlled to ON or OFF by the microcomputer, the switching relay can be
omitted.
Since the control current is microscopic, the switching relay of small current capacity is satisfactory
for switching.
(2)
2007-02-20
3
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TB2922HQ(O) 功能描述:音頻放大器 2ch BTL Audio AMP P-ch N-ch DMOS Out-P RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel
TB2923AHQ(O) 制造商:Toshiba America Electronic Components 功能描述:IC
TB2923HQ(O) 功能描述:音頻放大器 51W x 4-CH class-AB car power amp RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel
TB2924FG 制造商:Toshiba 功能描述:CLASS-D AUDIO POWER AMPLIFIER
TB2924FG(O,EL) 功能描述:音頻放大器 20W x 2ch Class-D Audio Pwr Amp RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel
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