LM4938MH/NOPB National Semiconductor, LM4938MH/NOPB Datasheet - Page 4

• 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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P
THD+N
PSRR
SNR
X
P
THD+N
PSRR
SNR
X
O
talk
O
talk
Electrical Characteristics for Bridged Mode Operation
The following specifications apply for V
Symbol
Electrical Characteristics for Single-Ended Mode Operation
The following specifications apply for V
Symbol
Output Power
Total Harmonic Distortion + Noise
Power Supply Rejection Ratio
Signal to Noise Ratio
Channel Separation
Output Power
Total Harmonic Distortion + Noise
Power Supply Rejection Ratio
Signal to Noise Ratio
Channel Separation
Parameter
Parameter
DD
DD
= 5V, unless otherwise noted. Limits apply for T
= 5V. Limits apply for T
THD + N = 1.0%; f = 1kHz
R
THD + N = 1.0%; f = 1kHz
R
THD = 1% (max); f = 1kHz
R
THD+N = 10%; f = 1 kHz; R
P
R
C
V
Floating
C
V
Terminated
V
A-Wtd Filter, 1kHz
f = 1kHz, C
THD = 1.0%; f = 1kHz; R
V
R
C
V
C
V
P
A-Wtd Filter
f = 1kHz, C
O
RIPPLE
RIPPLE
DD
OUT
RIPPLE
RIPPLE
OUT
L
L
L
L
B
B
L
B
B
= 3Ω (Note 8)
= 4Ω (Note 9)
= 8Ω
= 8Ω, A
= 10kΩ, A
= 1.0 µF, f = 120 Hz,
= 1.0 µF, f = 120 Hz,
= 1.0 µF, f = 120 Hz,
= 1.0 µF, f = 120 Hz,
= 0.4W, f = 1kHz,
= 5V, P
= 1V
= 75mW, R
= 200 mVrms; R
= 200 mVrms; R
= 200 mVrms, Floating
= 200 mVrms, Terminated
RMS
VD
B
B
OUT
Conditions
Conditions
4
= 1.0µF, 1W
= 1.0 µF
VD
= 2
, f = 1kHz,
A
= 1.2W, R
= 1
L
= 25˚C.
= 32Ω,
L
L
L
= 8Ω,
= 8Ω,
L
= 32Ω
L
= 8Ω,
= 8Ω
(Note 14)
(Note 14)
A
(Notes 7, 10) (Continued)
Typical
Typical
0.065
= 25˚C.
0.05
100
100
2.2
1.3
1.5
78
60
76
92
63
59
73
2
LM4938
LM4938
(Notes 7, 10)
(Note 15)
(Note 15)
Limit
Limit
1.0
(Limits)
W (min)
(Limits)
Units
Units
mW
dB
dB
dB
dB
dB
dB
dB
dB
W
W
W
%
%