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參數(shù)資料
| 型號： | AS1702 |
| 廠商： | AUSTRIAMICROSYSTEMS AG |
| 英文描述： | 1.6W Single-Channel Audio Power Amplifiers |
| 中文描述： | 為1.6W單聲道音頻功率放大器 |
| 文件頁數(shù)： | 7/13頁 |
| 文件大小： | 187K |
| 代理商： | AS1702 |
www.austriamicrosystems.com
Revision 1.01
7 - 13
AS1702, AS1703, AS1704, AS1705
Data Sheet
austria
micro
systems
BTL Amplifier
7.1 BTL Amplifier
All devices are designed to drive loads differentially in a bridge-tied load (BTL) configuration.
Figure 4. Bridge Tied Load Configuration
The BTL configuration doubles the output voltage (illustrated in Figure 4) compared to a single-ended amplifier under
similar conditions. Thus, the differential gain of the device (A
VD
) is twice the closed-loop gain of the input amplifier. The
effective gain is given by:
Substituting 2 x V
OUT(P-P)
for V
OUT(P-P)
into (EQ 3) and (EQ 4) yields four times the output power due to doubling of
the output voltage:
Since the BTL outputs are biased at mid-supply, there is no net DC voltage across the load. This eliminates the need
for the large, expensive, performance degrading DC-blocking capacitors required by single-ended amplifiers.
7.2 Power Dissipation and Heat Sinking
Normally, the devices dissipate a significant amount of power. The maximum power dissipation is given in Table 1 as
Continuous Power Dissipation, or it can be calculated by:
where T
J(MAX)
is +150°C, T
AMB
(see Table 1) is the ambient temperature, and
Θ
JA
is the reciprocal of the derating fac-
tor in °C/W as specified in Table 1. For example,
Θ
JA
of the TQFN package is +59.2°C/W.
The increased power delivered by a BTL configuration results in an increase in internal power dissipation versus a sin-
gle-ended configuration. The maximum internal power dissipation for a given V
CC
and load is given by:
+1
-1
V
OUT(P-P)
V
OUT(P-P)
2 x V
OUT(P-P)
A
VD
= 2 x
R
IN
(EQ 2)
R
F
V
RMS
=
2 2
(EQ 3)
V
OUT(P-P)
P
OUT
=
R
L
(EQ 4)
V
RMS
2
P
DISSPKF(MAX)
=
Θ
JA
(EQ 5)
T
J(MAX)
-T
A
P
DISSPKF(MAX)
=
π
2
R
L
(EQ 6)
2V
CC
2
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AS1703 | 1.6W Single-Channel Audio Power Amplifiers |
| AS1703-T | 1.6W Single-Channel Audio Power Amplifiers |
| AS1704-T | 1.6W Single-Channel Audio Power Amplifiers |
| AS1705 | 1.6W Single-Channel Audio Power Amplifiers |
| AS1705-T | ECONOLINE: REC3-S_DR/H1 - 3W DIP Package- 1kVDC Isolation- Regulated Output- UL94V-0 Package Material- Continuous Short Circiut Protection- Internal SMD design- 100% Burned In- Efficiency to 75% |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AS1702_1 | 制造商:AMSCO 制造商全稱:austriamicrosystems AG 功能描述:1.8W Single-Channel Audio Power Amplifiers |
| AS1702_DK_ST | 功能描述:AS1702-05 - 1-Channel (Mono) Output Class AB Audio Amplifier Evaluation Board 制造商:ams 系列:- 零件狀態(tài):有效 放大器類型:AB 類 輸出類型:1-通道（單聲道） 不同負載時的最大輸出功率 x 通道數(shù):1.8W x 1 @ 4 歐姆 電壓 - 電源:2.7 V ~ 5.5 V 板類型:完全填充 使用的 IC/零件:AS1702-05 所含物品:板 標準包裝:1 |
| AS1702-05 DB | 功能描述:BOARD DEMO AS1702-05 RoHS:否 類別:編程器，開發(fā)系統(tǒng) >> 評估板 - 音頻放大器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:1 系列:- |
| AS1702-05-DB | 制造商:ams 功能描述:AS1702-05 Demo Board |
| AS1702-T | 功能描述:IC AMP AUD 1.8W ADJ GAIN 10-MSOP RoHS:是 類別:集成電路 (IC) >> 線性 - 音頻放大器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:2,500 系列:DirectDrive® 類型:D 類 輸出類型:1-通道（單聲道），帶立體聲耳機 在某負載時最大輸出功率 x 通道數(shù)量:930mW x 1 @ 8 歐姆; 40mW x 2 @ 16 歐姆 電源電壓:2.7 V ~ 5.5 V 特點:消除爆音，差分輸入，I²C，靜音，關(guān)閉，音量控制 安裝類型:表面貼裝 供應(yīng)商設(shè)備封裝:25-WLP（2.09x2.09） 封裝/外殼:25-WFBGA，WLCSP 包裝:帶卷 (TR) 其它名稱:MAX97000EWA+T-ND |
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