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TPA032D01DCA Datasheet(PDF) 3 Page - Texas Instruments |
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TPA032D01DCA Datasheet(HTML) 3 Page - Texas Instruments |
3 / 22 page TPA032D01 10-W MONO CLASS-D AUDIO POWER AMPLIFIER SLOS282A – DECEMBER 1999 – REVISED MARCH 2000 3 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 Terminal Functions TERMINAL DESCRIPTION NAME NO. DESCRIPTION AGND 3, 7, 20, 43, 44, 45, 46, 47 Analog ground for headphone and Class-D analog circuitry COSC 48 Connect a capacitor from analog ground to this terminal to set the frequency of the ramp reference signal. CP1 24 First diode node for charge pump CP2 25 First inverter switching node for charge pump FAULT0 42 Logic level fault0 output signal. Lower order bit of the two fault signals with open drain output. FAULT1 41 Logic level fault1 output signal. Higher order bit of the two fault signals with open drain output. COMP 6 Compensation capacitor terminal for Class-D amplifier INN 4 Class-D negative input INP 5 Class-D positive input OUTN 14, 15 Class-D amplifier negative output of H-bridge OUTP 10, 11 Class-D amplifier positive output of H-bridge PVDD 9, 16 Class-D amplifier power supply MUTE 2 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. NC 18, 19, 23, 26, 30, 31, 34, 35, 38, 39 Not connected PGND 12, 13 Power ground for H–bridge only PGND 27 Power ground for charge pump only PGND 36, 37 Power ground for right-channel H-bridge only PVDD 21, 28, 33, 40 VDD supply for charge-pump and gate drive circuitry SHUTDOWN 1 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. V2P5 29 2.5V internal reference bypass. This terminal requires a capacitor to ground. VCC 32 5V supply to circuitry. This terminal is typically connected to VCCREG. VCCREG 17 5-V regulator output. This terminal requires a 1- µF capacitor to ground for stability reasons. VCP 22 Connect a capacitor from this terminal to power ground to provide storage for the charge pump output voltage. VDD 8 VDD bias supply for analog circuitry. This terminal needs to be well filtered to prevent degrading the device performance. Class-D amplifier faults Table 1. Class-D Amplifier Fault Table FAULT 0 FAULT 1 DESCRIPTION 1 1 No fault. The device is operating normally. 0 1 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. 0 0 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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