LM4938MH/NOPB National Semiconductor, LM4938MH/NOPB Datasheet - Page 6

• Manufacturer Part Number: LM4938MH/NOPB
• Description: IC AMP AUDIO PWR 2.2W AB 28TSSOP
• Manufacturer: National Semiconductor
• Series: Boomer®r
• Type: Class ABr

Specifications of LM4938MH/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
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: *LM4938MH; *LM4938MH/NOPB; LM4938MH

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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
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