TDA7491HV Datasheet, PDF (8/26 Pages) STMicroelectronics – 20 W + 20 W dual BTL class-D audio amplifier

Electrical specifications
TDA7491HV
Table 5.
Symbol
Electrical specifications (continued)
Parameter
Condition
Min Typ Max Unit
R_dsON
Power transistor on resistance
High side
Low side
0.2
Ω
0.2
P_o
Output power
THD = 10%
THD = 1%
20
W
16
P_o
Output power
R_L = 8 Ω, THD = 10%
VCC = 12 V
R_L = 8 Ω, THD = 1%
VCC = 12 V
9.5
W
7.2
P_D
Dissipated power
P_o = 20 W + 20 W,
THD = 10%
4.0
W
η
THD
Efficiency
Total harmonic distortion
P_o = 20 W + 20 W
80 90
%
P_o = 1 W
0.1 0.4 %
GAIN0 = L, GAIN1 = L 18 20 22
G_V
Closed loop gain
GAIN0 = L, GAIN1 = H 24 26 28
dB
GAIN0 = H, GAIN1 = L 28 30 32
GAIN0 = H, GAIN1 = H 30 32 34
∆G_V
Gain matching
CT
Cross talk
f = 1 kHz
-1
1
dB
50
dB
eN
Total input noise
A Curve, G_V = 20 dB
f = 22 Hz to 22 kHz
20
µV
25 35
SVRR
T_r, T_f
F_SW
F_SWR
Supply voltage rejection ratio
Rise and fall times
Switching frequency
Output switching frequency
Fr = 100 Hz, Vr = 0.5 V,
C_SVR = 10 µF
40
50
dB
50
ns
Internal oscillator
290 310 330 kHz
With internal oscillator ⁽¹⁾ 250
kHz
With external oscillator ⁽²⁾ 250
V_inH
Digital input high (H)
V_inL
Digital input low (L)
Function
mode
Standby, mute and play modes
2.3
STBY < 0.5 V, MUTE = X Standby
STBY > 2.5 V, MUTE < 1 V Mute
STBY > 2.5 V, MUTE > 2 V Play
V
0.8
A_MUTE Mute attenuation
VMute = 1 V
60 80
dB
1. F_SW = 10⁶ / (64 * R_OSC + 440) kHz, f_SYNCLK = 2 * F_SW with R1 in kΩ (see Figure 22).
2. F_SW = f_SYNCLK / 2 with the frequency of the external oscillator.
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