LM48511SQ
This product is designed for driving a single speaker efficiently, ideal for various audio applicationsLM48511SQ
This product is designed for driving a single speaker efficiently, ideal for various audio applications
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製造商零件號 # : LM48511SQ
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包裝/封裝: QFN-24
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製造商: Texas Instruments
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產品分類 : Instrumentation, OP Amps, Buffer Amps
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例子
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管或託盤
LM48511SQ 數據表
目前的價格方案正在編制中。請聯絡我們的客戶服務團隊獲取最新的價格資訊。感謝您的理解和支援!
詳細說明
for the LM48511The LM48511 device integrates a boost converter with ahigh-efficiency Class D audio power amplifier to provide 3-W continuous power into an 8-Ω speakerwhen operating from a 5-V power supply. When operating from a 3-V to 4-V power supply, the LM48511 can beconfigured to drive 1 to 2.5 W into an 8-Ω load with less than 1% distortion (THD+N). The Class Damplifier features a low-noise PWM architecture that eliminates the output filter, reducingexternal component count, board area consumption, system cost, and simplifying design. A selectablespread spectrum modulation scheme suppresses RF emissions, further reducing the need for outputfilters. The switching regulator of the LM48511 is a current-mode boostconverter operating at a fixed frequency of 1 MHz. Two selectable feedback networks allow theLM48511 regulator to dynamically switch between two different output voltages,improving efficiency by optimizing the amplifier’s supply voltage based on battery voltage andoutput power requirements. The LM48511 is designed for use in portable devices, such as GPS,mobile phones, and MP3 players. The high, 80% efficiency at 5 V, extends battery life when comparedto Boosted Class AB amplifiers. Independent regulator and amplifier shutdown controls optimizepower savings by disabling the regulator when high-output power is not required. The gain of the LM48511 is set by external resistors, which allowsindependent gain control from multiple sources by summing the signals. Output short circuit andthermal overload protection prevent the device from damage during fault conditions. Superior clickand pop suppression eliminates audible transients during power-up and shutdown.
主要特徵
- 3-WOutput into 8 Ω at 5 V With THD+N = 1%
- Selectable spread spectrum modereduces EMI
- 80%Efficiency
- Independent regulator and amplifier shutdowncontrols
- Dynamically Selectable Regulator OutputVoltages
- Filterless Class D
- 3-V to 5.5-VOperation
- Low shutdown current
- Click and pop suppression
- Key specifications
- Quiescent power supplycurrent
- VDD = 3 V 9 mA (Typical)
- VDD = 5 V 13.5 mA (Typical)
- PO atVDD = 5 V, PV1 = 7.8 V, RL = 8 Ω,THD+N = 1% 3 W (Typical)
- PO atVDD = 3 V, PV1 = 4.8 V, RL = 8 Ω,THD+N = 1% 1 W (Typical)
- PO atVDD = 5 V, PV1 = 7.8 V, RL = 4 Ω,THD+N = 1% 5.4 W (Typical)
- Shutdown Current at VDD= 3 V, 0.01 µA (Typical)
- Quiescent power supplycurrent
規格
以下是所選零件的基本參數,涉及零件的特性及其所屬類別。
Rohs Code | Yes | Part Life Cycle Code | Obsolete |
Part Package Code | QFN | Pin Count ! | 24 |
Reach Compliance Code | compliant | ECCN Code | EAR99 |
HTS Code ! | 8542.33.00.01 | Bandwidth-Nom | 22 kHz |
Consumer IC Type | AUDIO AMPLIFIER | JESD-30 Code | R-XQCC-N24 |
JESD-609 Code | e3 | Length | 5 mm |
Moisture Sensitivity Level | 1 | Number of Channels | 1 |
Number of Functions | 1 | Number of Terminals | 24 |
Operating Temperature-Max | 85 °C | Operating Temperature-Min | -40 °C |
Output Power-Nom | 6.7 W | Package Body Material | UNSPECIFIED |
Package Code | HVQCCN | Package Shape | RECTANGULAR |
Package Style | CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE | Peak Reflow Temperature (Cel) | 260 |
Qualification Status ! | Not Qualified | Seated Height-Max | 0.8 mm |
Supply Voltage-Max (Vsup) | 5.5 V | Supply Voltage-Min (Vsup) | 3 V |
Surface Mount ! | YES | Temperature Grade ! | INDUSTRIAL |
Terminal Finish | MATTE TIN | Terminal Form ! | NO LEAD |
Terminal Pitch ! | 0.5 mm | Terminal Position | QUAD |
Time@Peak Reflow Temperature-Max (s) | 40 | Width | 4 mm |
數據表 PDF
數據表記錄了器件的特性、絕對最大額定值、應用等,這對於作為器件特定應用的整體指南大有裨益。
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