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參數(shù)資料
| 型號(hào)： | LV47009P-E |
| 廠商： | ON Semiconductor |
| 文件頁(yè)數(shù)： | 7/11頁(yè) |
| 文件大?。?/td> | 0K |
| 描述： | IC AUDIO AMP BTL 41W 4CH HZIP25 |
| 標(biāo)準(zhǔn)包裝： | 15 |
| 類型： | AB 類 |
| 輸出類型： | 4-通道（四路） |
| 在某負(fù)載時(shí)最大輸出功率 x 通道數(shù)量： | 24W x 4 @ 4 歐姆 |
| 電源電壓： | 8 V ~ 16 V |
| 特點(diǎn)： | 靜音，短路和熱保護(hù) |
| 安裝類型： | * |
| 供應(yīng)商設(shè)備封裝： | * |
| 封裝/外殼： | * |
| 包裝： | * |
Technical Note
5/16
BH76906GU, BH76909GU, BH76912GU, BH76916GU, BH76706GU
www.rohm.com
2009.03 - Rev.A
2009 ROHM Co., Ltd. All rights reserved.
C1
NVCC
-VCC
(-2.75 V)
Flying capacitor “-“ pin (8pin)
B1
C_MINUS
0V
↑↓
-VCC
(-2.75 V)
Note 1) DC voltages in the figure are those when VCC ＝ 3.0 V.
Moreover, these values are reference values which are
not guaranteed.
Note 2) Numeric values in the figure are settings which do not guarantee ratings.
●Description of Operation
1) Principles of output coupling capacitorless video drivers
For an amplifier operated from a single power supply (single-supply), since the operating point has a potential of
approximately 1/2 Vcc, a coupling capacitor is required for preventing direct current in the output.
Moreover, since the
load resistance is 150
(75 + 75 ) for the video driver, the capacity of the coupling capacitor must be on the order of
1000
μF if you take into account the low band passband. (Fig.3)
For an amplifier operated from dual power supplies (+ supply), since the operating point can be at GND level, a coupling
capacitor for preventing output of direct current is not needed.
Moreover, since a coupling capacitor is not needed, in principle, there is no lowering of the low band characteristic at the
output stage.
(Fig.4)
2) Occurrence of negative voltage due to charge pump circuit
A charge pump, as shown in Fig. 5, consists of a pair of switches (SW1, SW2) and a pair of capacitors (flying capacitor,
anchor capacitor).
Switching the pair of switches as shown in Fig. 5 causes a negative voltage to occur by shifting the
charge in the flying capacitor to the anchor capacitor as in a bucket relay.
In this IC, by applying a voltage of +3 V, a negative voltage of approximately -2.8 V is obtained.
0V
NVC
C1
C2
VCC
C2
NVCC
GND
VCC
GND
VCC
NVC
Negative voltage pin (7pin)
Dual-supply amplifier
VCC
-VCC
75Ω
Single-supply amplifier
VCC
75Ω
1/2 VCC bias
1000μF
Fig.3
Fig.4
Output capacitor required since DC
voltage is occurring at output pin
Output capacitor not required since
DC voltage does not occur at output
pin
C_MINUS
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| LV47009PGEVB | 制造商:ON Semiconductor 功能描述:EVABD FOR LV47009P - Boxed Product (Development Kits) |
| LV47011P | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:For Car Audio Systems,4-Channel BTL Power Amplifier |
| LV47011P_12 | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:4-Channel BTL Power Amplifier |
| LV47011P-E | 功能描述:音頻放大器 50W 4CH AB 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 |
| LV47011PGEVB | 制造商:ON Semiconductor 功能描述:EVABOARD FOR LV47011P - Boxed Product (Development Kits) |
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