LM4938MHX/NOPB National Semiconductor, LM4938MHX/NOPB Datasheet - Page 6

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LM4938MHX/NOPB

Manufacturer Part Number
LM4938MHX/NOPB
Description
IC AMP AUDIO PWR 2.2W AB 28TSSOP
Manufacturer
National Semiconductor
Series
Boomer®r
Type
Class ABr
Datasheet

Specifications of LM4938MHX/NOPB

Output Type
2-Channel (Stereo) with Stereo Headphones
Max Output Power X Channels @ Load
2.2W x 2 @ 3 Ohm; 92mW x 2 @ 32 Ohm
Voltage - Supply
2.7 V ~ 5.5 V
Features
Bass Boost, Depop, Mute, Shutdown, Thermal Protection, Volume Control
Mounting Type
Surface Mount
Package / Case
28-TSSOP Exposed Pad, 28-eTSSOP, 28-HTSSOP
Operational Class
Class-AB
Audio Amplifier Output Configuration
2-Channel Stereo
Audio Amplifier Function
Headphone/Speaker
Total Harmonic Distortion
0.05@8Ohm@400mW%
Single Supply Voltage (typ)
3/5V
Dual Supply Voltage (typ)
Not RequiredV
Power Supply Requirement
Single
Rail/rail I/o Type
No
Power Supply Rejection Ratio
78dB
Single Supply Voltage (min)
2.7V
Single Supply Voltage (max)
5.5V
Dual Supply Voltage (min)
Not RequiredV
Dual Supply Voltage (max)
Not RequiredV
Operating Temp Range
-20C to 85C
Operating Temperature Classification
Commercial
Mounting
Surface Mount
Pin Count
28
Package Type
TSSOP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
LM4938MHX

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
LM4938MHX/NOPB
Manufacturer:
TI/德州仪器
Quantity:
20 000
www.national.com
Typical Application
Truth Table for Logic Inputs
Note 16: If system beep is detected on the Beep In pin, the system beep will be passed through the bridged amplifier regardless of the logic of the Mute and HP
sense pins.
Gain
Sel
X
X
0
0
0
0
1
1
1
1
Mode
0
0
1
1
0
0
1
1
X
X
Headphone
Sense
X
X
0
1
0
1
0
1
0
1
Mute
X
0
0
0
0
0
0
0
0
1
FIGURE 2. Typical Application Circuit
Shutdown Output Stage Set To
(Note 16)
0
0
0
0
0
0
0
0
0
1
External Gain
External Gain
External Gain
External Gain
Internal Gain
Internal Gain
Internal Gain
Internal Gain
6
Shutdown
Muted
DC Volume
Adjustable
Adjustable
Adjustable
Adjustable
Fixed
Fixed
Fixed
Fixed
X
X
Configuration
Output Stage
Muted
BTL
BTL
BTL
BTL
SE
SE
SE
SE
X
20095603

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