TPA032D01 Datasheet, PDF (3/22 Pages) Texas Instruments – 10-W MONO CLASS-D AUDIO POWER AMPLIFIER

TPA032D01
10-W MONO CLASS-D AUDIO POWER AMPLIFIER
SLOS282A – DECEMBER 1999 – REVISED MARCH 2000
Terminal Functions
TERMINAL
NAME
NO.
AGND
3, 7, 20,
43, 44, 45,
46, 47
COSC
48
CP1
24
CP2
25
FAULT0
42
FAULT1
41
COMP
6
INN
4
INP
5
OUTN
14, 15
OUTP
10, 11
PVDD
MUTE
9, 16
2
NC
PGND
PGND
PGND
PVDD
SHUTDOWN
18, 19, 23,
26, 30, 31,
34, 35, 38,
39
12, 13
27
36, 37
21, 28, 33,
40
1
V2P5
29
VCC
32
VCCREG
17
VCP
22
VDD
8
DESCRIPTION
Analog ground for headphone and Class-D analog circuitry
Connect a capacitor from analog ground to this terminal to set the frequency of the ramp reference signal.
First diode node for charge pump
First inverter switching node for charge pump
Logic level fault0 output signal. Lower order bit of the two fault signals with open drain output.
Logic level fault1 output signal. Higher order bit of the two fault signals with open drain output.
Compensation capacitor terminal for Class-D amplifier
Class-D negative input
Class-D positive input
Class-D amplifier negative output of H-bridge
Class-D amplifier positive output of H-bridge
Class-D amplifier power supply
Active-low TTL logic-level mute input signal. When MUTE is held low, the selected amplifier is muted. When
MUTE is held > high, the device operates normally. When the Class-D amplifier is muted, the low-side output
transistors are turned on, shorting the load to ground.
Not connected
Power ground for H–bridge only
Power ground for charge pump only
Power ground for right-channel H-bridge only
VDD supply for charge-pump and gate drive circuitry
Active-low TTL logic-level shutdown input signal. When SHUTDOWN is held low, the device goes into shutdown
mode. When SHUTDOWN is held high, the device operates normally.
2.5V internal reference bypass. This terminal requires a capacitor to ground.
5V supply to circuitry. This terminal is typically connected to VCCREG.
5-V regulator output. This terminal requires a 1-µF capacitor to ground for stability reasons.
Connect a capacitor from this terminal to power ground to provide storage for the charge pump output voltage.
VDD bias supply for analog circuitry. This terminal needs to be well filtered to prevent degrading the device
performance.
Class-D amplifier faults
FAULT 0
1
0
0
Table 1. Class-D Amplifier Fault Table
FAULT 1
1
1
0
DESCRIPTION
No fault. The device is operating normally.
Charge pump under-voltage lock-out (VCP-UV) fault. All low-side transistors are turned on, shorting the load to
ground. Once the charge pump voltage is restored, normal operation resumes, but FAULT1 is still active. This is not
a latched fault, however. FAULT1 is cleared by cycling MUTE, SHUTDOWN, or the power supply.
Thermal fault. All the low-side transistors are turned on, shorting the load to ground. Once the junction temperature
drops 20°C, normal operation resumes (not a latched fault). But the FAULTx terminals are still set and are cleared
by cycling MUTE, SHUTDOWN, or the power supply.
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