LM49270 Datasheet, PDF (5/24 Pages) Texas Instruments – Filterless 2.2W Stereo Class D Audio Subsystem with OCL Headphone Amplifier, 3D Enhancement, and Headphone Sense

Absolute Maximum Ratings (Notes 1, 2)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Thermal Resistance
 θ_JA
Operating Ratings (Notes 1, 2)
35.1°C/W
Supply Voltage (Note 1)
Storage Temperature
Input Voltage
Power Dissipation (Note 3)
ESD Susceptibility(Note 4)
ESD Susceptibility (Note 5)
Junction Temperature (T_JMAX)
6.0V
−65°C to +150°C
–0.3V to V_DD +0.3V
Internally Limited
2000V
200V
150°C
Temperature Range
T_MIN ≤ T_A ≤ T_MAX
Supply Voltage
(V_DD, LSV_DD, HPV_DD)
I²C Voltage (I²CV_DD)
−40°C ≤ T_A ≤ 85°C
2.4V ≤ V_DD ≤ 5.5V
2.4V ≤ I²CV_DD ≤ 5.5V
Electrical Characteristics V_DD = 3.3V (Notes 1, 2) The following specifications apply for Headphone:
A_V = 0dB, R_L(HP) = 32Ω; for Loudspeakers: A_V = 6dB, R_L(SP) = 15μH + 8Ω + 15μH , f = 1kHz, unless otherwise specified. Limits
apply for T_A = 25°C.
Symbol
Parameter
Conditions
LM49270
Typical
Limit
(Note 6) (Notes 7, 8)
Units
(Limits)
I_DD
Supply Current
V_IN = 0, R_L = No Load,
Both channels active
Speaker ON, HP OFF
Speaker OFF, CC HP ON
Speaker OFF, OCL HP ON
5.5
7.6
mA (max)
3
4.7
mA (max)
4
5.75
mA (max)
I_SD
Shutdown Supply Current
V_OS
Output Offset Voltage
Headphone
Speaker
0.02
2
μA (max)
10
25
mV (max)
10
60
mV (max)
Speaker Mode, f = 1kHz
THD+N = 1%
R_L = 4Ω
700
R_L = 8Ω
450
THD+N = 10%
R_L = 4Ω
870
R_L = 8Ω
560
CC Headphone Mode, f = 1kHz
mW
400
mW (min)
mW
mW
P_OUT
Output Power
THD+N = 1%
R_L = 16Ω
60
R_L = 32Ω
36
THD+N = 10%
R_L = 16Ω
74
R_L = 32Ω
55
OCL Headphone Mode, f = 1kHz
mW
30
mW (min)
mW
mW
THD+N = 1%
R_L = 16Ω
R_L = 32Ω
THD+N = 10%
R_L = 16Ω
R_L = 32Ω
60
mW
36
30
mW (min)
73
mW
55
mW
5
www.national.com