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FDA903U Datasheet(PDF) 6 Page - STMicroelectronics

Part # FDA903U
Description  1 x 45 W class D digital input automotive power amplifier with ILoad current monitoring, wide voltage operation range for car audio and telematic
PDF  80 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

FDA903U Datasheet(HTML) 6 Page - STMicroelectronics

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List of figures
FDA903U
6/80
DS12498 Rev 2
List of figures
Figure 1.
Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Figure 2.
Pins connection diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Figure 3.
Application diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Figure 4.
Efficiency and power dissipation (Vs = 14.4 V, RL = 1 x 4 Ω, f = 1 kHz sine wave) . . . . . . 15
Figure 5.
Efficiency and power dissipation (Vs = 14.4 V, RL = 1 x 4 Ω, pink noise) . . . . . . . . . . . . . . 15
Figure 6.
Efficiency and power dissipation (Vs = 14.4 V, RL = 1 x 2 Ω, f = 1 kHz sine wave) . . . . . . 16
Figure 7.
Efficiency and power dissipation (Vs = 14.4 V, RL = 1 x 2 Ω, pink noise) . . . . . . . . . . . . . . 16
Figure 8.
Efficiency and power dissipation (Vs = 14.4 V, RL = 1 x 8 Ω, f = 1 kHz sine wave) . . . . . . 16
Figure 9.
Efficiency and power dissipation (Vs = 14.4 V, RL = 1 x 8 Ω, pink noise) . . . . . . . . . . . . . . 16
Figure 10.
Efficiency and power dissipation (Vs = 18 V, RL = 1 x 4 Ω, f = 1 kHz sine wave). . . . . . . . 16
Figure 11.
Efficiency and power dissipation (Vs = 18 V, RL = 1 x 4 Ω, pink noise) . . . . . . . . . . . . . . . 16
Figure 12.
Efficiency and power dissipation (Vs = 16 V, RL = 1 x 2 Ω, f = 1 kHz sine wave) . . . . . . . 17
Figure 13.
Efficiency and power dissipation (Vs = 16 V, RL = 1 x 2 Ω, pink noise) . . . . . . . . . . . . . . . 17
Figure 14.
Efficiency and power dissipation (Vs = 18 V, RL = 1 x 8 Ω, f = 1 kHz sine wave). . . . . . . . 17
Figure 15.
Efficiency and power dissipation (Vs = 18 V, RL = 1 x 8 Ω, pink noise) . . . . . . . . . . . . . . . 17
Figure 16.
Efficiency and power dissipation (Vs = 3.3 V, RL = 1 x 4 Ω, f = 1 kHz sine wave) . . . . . . . 17
Figure 17.
Efficiency and power dissipation (Vs = 3.3 V, RL = 1 x 4 Ω, pink noise) . . . . . . . . . . . . . . . 17
Figure 18.
Efficiency and power dissipation (Vs = 3.3 V, RL = 1 x 2 Ω, f = 1 kHz sine wave) . . . . . . . 18
Figure 19.
Efficiency and power dissipation (Vs = 3.3 V, RL = 1 x 2 Ω, pink noise) . . . . . . . . . . . . . . . 18
Figure 20.
Efficiency and power dissipation (Vs = 3.3 V, RL = 1 x 8 Ω, f = 1 kHz sine wave) . . . . . . . 18
Figure 21.
Efficiency and power dissipation (Vs = 3.3 V, RL = 1 x 8 Ω, pink noise) . . . . . . . . . . . . . . . 18
Figure 22.
Output power vs. supply voltage (RL = 4 Ω, sine wave) . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Figure 23.
Output power vs. supply voltage (RL = 2 Ω, sine wave) . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Figure 24.
Output power vs. supply voltage (RL = 8 Ω, sine wave) . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Figure 25.
THD vs. output power (VS = 14.4 V, RL = 4 Ω). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Figure 26.
THD vs. output power (VS = 14.4 V, RL = 2 Ω). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Figure 27.
THD vs. output power (VS = 14.4 V, RL = 8 Ω). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Figure 28.
THD vs. frequency (VS = 14.4 V, RL = 4 Ω, PO = 1 W). . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Figure 29.
THD vs. frequency (VS = 14.4 V, RL = 2 Ω, PO = 1 W). . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Figure 30.
THD vs. frequency (VS = 14.4 V, RL = 8 Ω, PO = 1 W). . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Figure 31.
Frequency response (1 W, RL = 4 Ω, f = 1 kHz) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Figure 32.
Frequency response (1 W, RL = 2 Ω, f = 1 kHz) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Figure 33.
Frequency response (1 W, RL = 8 Ω, f = 1 kHz) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Figure 34.
PSRR vs. frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Figure 35.
Quiescent current vs. supply voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
Figure 36.
Dynamic range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Figure 37.
FFT - Output spectrum (-60 dBFS input signal) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Figure 38.
Current sensing THD vs. AMP (2 Ω load; VS = 16 V; f = 100 Hz) . . . . . . . . . . . . . . . . . . . 21
Figure 39.
Current sensing THD vs. AMP (4 Ω load; VS = 14.4 V; f = 100 Hz) . . . . . . . . . . . . . . . . . . 21
Figure 40.
Current sensing THD vs. frequency (4 Ω load; VS = 14.4 V; PO = 1 W) . . . . . . . . . . . . . . 21
Figure 41.
Finite state machine diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Figure 42.
Operation vs. battery charge. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Figure 43.
Analog-Mute diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Figure 44.
Digital-Mute diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Figure 45.
Mixed mute diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Figure 46.
Analog-Mute vs. Mixed-Mute . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Figure 47.
HWMute pin schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Figure 48.
Response obtained with a limitation corresponding to 80% of the full-scale . . . . . . . . . . . 34



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