LM4651 Datasheet, PDF (2/20 Pages) National Semiconductor (TI) – LM4651 & LM4652 Overture™ Audio Power Amplifier 170W Class D Audio Power Amplifier Solution

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.
Supply Voltage
Output Current (LM4652)
Power Dissipation (LM4651) (Note 3)
Power Dissipation (LM4652) (Note 3)
ESD Susceptibility (LM4651) (Note 4)
LM4652 (pins 2,6,10,11)
ESD Susceptibility (LM4651) (Note 5)
LM4652 (pins 2,6,10,11)
Junction Temperature (Note 6)
Soldering Information
N, TA and TF Package (10 seconds)
Storage Temperature
± 22V
10A
1.5W
32W
2000V
500V
200V
100V
150˚C
260˚C
−40˚C to + 150˚C
Operating Ratings (Notes 1, 2)
Temperature Range
Supply Voltage |V⁺| + |V^−|
−40˚C ≤ T_A ≤ +85˚C
22V to 44V
Thermal Resistance
LM4651 N Package
θJA
θJC
52˚C/W
22˚C/W
LM4652 TF, TO−220 Package
θJA
θJC
43˚C/W
2.0˚C/W
LM4652 T, TO−220 Package
θJA
θJC
37˚C/W
1.0˚C/W
System Electrical Characteristics for LM4651 and LM4652 (Notes 1, 2)
The following specifications apply for +V_CC = +20V, −V_EE = −20V, f _SW = 125kHz, f_IN = 100Hz, R_L = 4Ω, unless otherwise
specified. Typicals apply for T_A = 25˚C. For specific circuit values, refer to Figure 1 (Typical Audio Application Circuit).
Symbol
Parameter
Conditions
LM4651 & LM4652
Typical
Units
I_CQ
I_STBY
A_M
P_O
η
η
Total Quiescent Power Supply
Current
Standby Current
Standby Attenuation
Output Power (Continuous Average)
Efficiency at P_O = 5W
Efficiency
(LM4651 & LM4652)
V_CIN = 0V, L _O = 0mA, |I_VCC+| + |I_VEE−|
R_DLY = 0Ω
R_DLY = 10kΩ
V_PIN13 = 5V, Stby: On
V_PIN13 = 5V, Stby: On
R_L = 4Ω, 1% THD
R_L = 4Ω, 10% THD
R_L = 8Ω, 1% THD
R_L = 8Ω, 10% THD
f_SW = 75kHz, R_L = 4Ω, 1% THD
f_SW = 75kHz, R_L = 4Ω, 10% THD
P_O = 5W, R_DLY = 5kΩ
P_O = 125W, THD = 1%
237
mA
124
mA
17
mA
>115
dB
125
W
155
W
75
W
90
W
135
W
170
W
55
%
85
%
Power Dissipation
Pd
(LM4651 + LM4652)
P_O = 125W, THD = 1% (max)
f_SW = 75kHz, P_O = 135W,
THD = 1% (max)
22
W
22
W
THD+N
Total Harmonic Distortion Plus Noise
10W, 10Hz ≤ f_IN ≤ 500Hz, A_V = 18 dB
10Hz ≤ BW ≤ 80kHz
0.3
%
e_OUT
Output Noise
A Weighted, no signal, R_L = 4Ω
550
µV
SNR
Signal-to-Noise Ratio
A-Wtg, P_out = 125W, R_L 4Ω
22kHz BW, P_out = 125W, R_L 4Ω
92
dB
89
dB
V_OS
Output Offset Voltage
V_IN = 0V, I_O = 0mA, R_OFFSET = 0Ω
0.7
V
PSRR
Power Supply Rejection Ratio
R_L = 4Ω, 10Hz ≤ BW ≤ 30kHz
37
dB
+V_CCAC = −V_EEAC = 1V_RMS, f_AC = 120Hz
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