LM49150, LM49150TLEVAL
www.ti.com
LM49150
SNAS439C – AUGUST 2008 – REVISED MAY 2013
Mono Class D Audio Subsystem with Earpiece
Driver and Stereo Ground Referenced Headphone Amplifiers
Check for Samples: LM49150, LM49150TLEVAL
FEATURES
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E S 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
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Output power at VDD = 5V:
– Speaker: RL = 8Ω BTL, THD+N ≤ 1%: 1.25W
(typ)
– Headphone: RL = 32Ω SE, THD+N ≤ 1%:
42mW (typ)
– Earpiece: RL = 8Ω SE, THD+N ≤ 1%: 135mW
(typ)
Output power at VDD = 3.3V:
– Speaker: RL = 8Ω BTL, THD+N ≤ 1%:
520mW (typ)
– Headphone: RL = 32Ω BTL, THD+N ≤ 1%:
42mW (typ)
– Earpiece: RL = 8Ω SE, THD+N ≤ 1%: 35mW
(typ)
Output Offset
– LS Mode: 9mV (typ)
– HP Mode: 1mV (typ)
– Earpiece: 1mV (typ)
Single Supply Operation (VDD): 2.7 to 5.5V
I2C Single Supply Operation: 1.7 to 5.5V
APPLICATIONS
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Mobile Phones
PDAs
Portable Electronics
DESCRIPTION
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
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