LM49150

Name: LM49150
Brand: TI
SKU: LM49150
Price: 1.091 USD

現行

具整合式 135-mW 聽筒放大器和 42-mW 耳機放大器的 1.25W 單聲道 D 類音訊放大器

立即訂購

產品規格表

document-pdfAcrobat Mono Class D Audio Subsystem w/ Earpiece Driver & Stereo Gnd Ref Headphone Amps datasheet (Rev. C) (英文)

LM49150

現行

產品規格表

立即訂購

產品詳細資料

Rating

Catalog

Operating temperature range (°C)

-40 to 85

Rating

Catalog

Operating temperature range (°C)

-40 to 85

DSBGA (YZR)

20

6.1875 mm² 2.75 x 2.25

E²S Class D Amplifier
Ground Referenced Headphone Outputs — Eliminates Output Coupling Capacitors
I²C Volume and Mode Control
Mono Earpiece Amplifier
Flexible Output for Speaker and Headphone Output
20–Bump DSBGA Package
Soft Enable Function
“Click and Pop” Suppression Circuitry
Thermal Shutdown Protection
Low Supply Current
Micro-Power Shutdown

Key Specifications

Output power at V_DD = 5V:
- Speaker: R_L = 8Ω BTL, THD+N ≤ 1%: 1.25W (typ)
- Headphone: R_L = 32Ω SE, THD+N ≤ 1%: 42mW (typ)
- Earpiece: R_L = 8Ω SE, THD+N ≤ 1%: 135mW (typ)
Output power at V_DD = 3.3V:
- Speaker: R_L = 8Ω BTL, THD+N ≤ 1%: 520mW (typ)
- Headphone: R_L = 32Ω BTL, THD+N ≤ 1%: 42mW (typ)
- Earpiece: R_L = 8Ω SE, THD+N ≤ 1%: 35mW (typ)
Output Offset
- LS Mode: 9mV (typ)
- HP Mode: 1mV (typ)
- Earpiece: 1mV (typ)
Single Supply Operation (V_DD): 2.7 to 5.5V
I2C Single Supply Operation: 1.7 to 5.5V

All trademarks are the property of their respective owners.

E²S Class D Amplifier
Ground Referenced Headphone Outputs — Eliminates Output Coupling Capacitors
I²C Volume and Mode Control
Mono Earpiece Amplifier
Flexible Output for Speaker and Headphone Output
20–Bump DSBGA Package
Soft Enable Function
“Click and Pop” Suppression Circuitry
Thermal Shutdown Protection
Low Supply Current
Micro-Power Shutdown

Key Specifications

Output power at V_DD = 5V:
- Speaker: R_L = 8Ω BTL, THD+N ≤ 1%: 1.25W (typ)
- Headphone: R_L = 32Ω SE, THD+N ≤ 1%: 42mW (typ)
- Earpiece: R_L = 8Ω SE, THD+N ≤ 1%: 135mW (typ)
Output power at V_DD = 3.3V:
- Speaker: R_L = 8Ω BTL, THD+N ≤ 1%: 520mW (typ)
- Headphone: R_L = 32Ω BTL, THD+N ≤ 1%: 42mW (typ)
- Earpiece: R_L = 8Ω SE, THD+N ≤ 1%: 35mW (typ)
Output Offset
- LS Mode: 9mV (typ)
- HP Mode: 1mV (typ)
- Earpiece: 1mV (typ)
Single Supply Operation (V_DD): 2.7 to 5.5V
I2C Single Supply Operation: 1.7 to 5.5V

All trademarks are the property of their respective owners.

The LM49150 is a fully integrated audio subsystem designed for portable handheld applications such as cellular phones. Part of TI's PowerWise product family, the LM49150 consumes very low power in the various modes of operation and still providing great audio performance. The LM49150 combines a 1.25W mono E²S (Enhanced Emission Suppression) class D amplifier, 135mW Class AB earpiece amplifier, 42mW/channel stereo ground reference headphone amplifiers, volume control, and mixing circuitry into a single device.

The filterless class D amplifier delivers 1.25W into an 8Ω load with <1% THD+N with a 5V supply. The E²S class D amplifier features a patented, ultra low EMI PWM architecture that significantly reduces RF emissions while preserving audio quality. The 42mW/channel headphone drivers feature TI’s ground referenced architecture that creates a ground-referenced output from a single supply, eliminating the need for bulky and expensive DC-blocking capacitors, saving space and minimizing cost.

The LM49150 features a fully differential mono input, and two single-ended stereo inputs. The three inputs can be mixed/multiplexed to either the speaker or headphone amplifiers. Each input channel has an independent, 32-step digital volume control. The headphone output stage features an additional, 8-step gain control, while the speaker output stage has a selectable 6dB or 12dB gain. The mixer, volume control and device mode select are controlled through an I²C compatible serial interface.

The LM49150’s superior click and pop suppression eliminates audible transients on power-up/down and during shutdown. The LM49150 is available in a ultra-small 20-bump DSBGA package (2.225mm X 2.644mm).

The LM49150 is a fully integrated audio subsystem designed for portable handheld applications such as cellular phones. Part of TI's PowerWise product family, the LM49150 consumes very low power in the various modes of operation and still providing great audio performance. The LM49150 combines a 1.25W mono E²S (Enhanced Emission Suppression) class D amplifier, 135mW Class AB earpiece amplifier, 42mW/channel stereo ground reference headphone amplifiers, volume control, and mixing circuitry into a single device.

The filterless class D amplifier delivers 1.25W into an 8Ω load with <1% THD+N with a 5V supply. The E²S class D amplifier features a patented, ultra low EMI PWM architecture that significantly reduces RF emissions while preserving audio quality. The 42mW/channel headphone drivers feature TI’s ground referenced architecture that creates a ground-referenced output from a single supply, eliminating the need for bulky and expensive DC-blocking capacitors, saving space and minimizing cost.

The LM49150 features a fully differential mono input, and two single-ended stereo inputs. The three inputs can be mixed/multiplexed to either the speaker or headphone amplifiers. Each input channel has an independent, 32-step digital volume control. The headphone output stage features an additional, 8-step gain control, while the speaker output stage has a selectable 6dB or 12dB gain. The mixer, volume control and device mode select are controlled through an I²C compatible serial interface.

The LM49150’s superior click and pop suppression eliminates audible transients on power-up/down and during shutdown. The LM49150 is available in a ultra-small 20-bump DSBGA package (2.225mm X 2.644mm).

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