Texas Instruments TPA005D12EVM, TPA005D12DCAR, TPA005D12DCA Datasheet

TPA005D12

2-W STEREO CLASS-D AUDIO POWER AMPLIFIER

SLOS241B – AUGUST 1999 – REVISED MARCH 2000

1

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

NOT RECOMMENDED FOR NEW DESIGNS

D

Choose TPA2000D2 For Upgrade

D

Extremely Efficient Class-D Stereo
Operation

D

Drives L and R Channels

D

2-W BTL Output Into 4 Ω

D

5-W Peak Music Power

D

Fully Specified for 5-V Operation

D

Low Quiescent Current

D

Shutdown Control . . . 0.2 µA

D

Thermally-Enhanced PowerP AD Surface­Mount Packaging

D

Thermal, Over-Current, and Under-V oltage
Protection

description

The TPA005D12 is a monolithic power IC stereo
audio amplifier that operates in extremely efficient
Class-D operation, using the high switching speed
of power DMOS transistors to replicate the analog
input signal through high-frequency switching of
the output stage. This allows the TPA005D12 to
be configured as a bridge-tied load (BTL) amplifier
capable of delivering up to 2 W of continuous
average power into a 4-Ω load at 0.5% THD+N
from a 5-V power supply in the high-fidelity audio
frequency range (20 Hz to 20 kHz). A BTL configuration eliminates the need for external coupling capacitors
on the output. A chip-level shutdown control is provided to limit total quiescent current to 0.2 µA, making the
device ideal for battery-powered applications.

A full range of protection circuitry is included to increase device reliability: thermal, over-current, and
under-voltage shutdown, with two status feedback terminals for use when any error condition is encountered.

The high switching frequency of the TP A005D12 allows the output filter to consist of three small capacitors and
two small inductors per channel. The high switching frequency also allows for good THD+N performance.

The TPA005D12 is offered in the thermally enhanced 48-pin PowerPAD TSSOP surface-mount package
(designator DCA).

AVAILABLE OPTIONS

PACKAGED DEVICES

T

A

TSSOP

†

(DCA)

–40°C to 125°C TPA005D12DCA

†

The DCA package is available in left-ended tape and reel. T o order
a taped and reeled part, add the suffix R to the part number (e.g.,
TPA005D12DCAR).

Copyright  2000, Texas Instruments Incorporated

PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

PowerPAD is a trademark of Texas Instruments Incorporated.

SHUTDOWN

MUTE

AGND

LINN
LINP

LCOMP

AGND

V

DD

LPV

DD

LOUTP
LOUTP

PGND

PGND
LOUTN
LOUTN

LPV

DD

NC
NC
NC

AGND

PV

DD

VCP

CP3
CP2

COSC
AGND
AGND
RINN
RINP
RCOMP
FAULT0
FAULT1
RPV

DD

ROUTP
ROUTP
PGND
PGND
ROUTN
ROUTN
RPV

DD

NC
NC
NC
V2P5
PV

DD

PGND
CP4
CP1

NC – No internal connection

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3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24

48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25

DCA PACKAGE

(TOP VIEW)

TPA005D12

2-W STEREO CLASS-D AUDIO POWER AMPLIFIER

SLOS241B – AUGUST 1999 – REVISED MARCH 2000

Template Release Date: 7–11–94

2

POST OFFICE BOX 655303 DALLAS, TEXAS 75265

•

_

+

_

+

LINP

RAMP

GENERATOR

_

+

_

+

GATE

DRIVE

LPV

DD

GATE

DRIVE

LPV

DD

GATE

DRIVE

RPV

DD

GATE

DRIVE

RPV

DD

OVER-I

DETECT

THERMAL

DETECT

VCP-UVLO

DETECT

TRIPLER

CHARGE PUMP

CONTROL and

STARTUP

LOGIC

GENERATOR

PV

CC

PV

DD

LINN

LCOMP

COSC

RCOMP

RINP
RINN

RPV

DD

AGND

LPV

DD

ROUTP

ROUTN

PV

DD

VCP

CP4

CP3

CP2

CP1

LOUTP

LOUTN

FAULT0

FAULT1

SHUTDOWN

MUTE

V2P5

LPV

DD

RPV

DD

PGND

VCP PV

DD

VCP PV

DD

VCP PV

DD

VCP PV

DD

V

DD

V

DD

PV

DD

10 kΩ10 kΩ

1.5 V

10 kΩ10 kΩ

1.5 V

NOTE A: LPVDD, RPVDD, VDD, and PVDD are externally connected. AGND and PGND are externally connected.

schematic

TPA005D12

2-W STEREO CLASS-D AUDIO POWER AMPLIFIER

SLOS241B – AUGUST 1999 – REVISED MARCH 2000

3

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

Terminal Functions

TERMINAL

NAME NO.

DESCRIPTION

AGND

3, 7, 20,

46, 47

Analog ground for headphone and Class-D analog sections

COSC 48 Capacitor I/O for ramp generator. Adjust the capacitor size to change the switching frequency.
CP1 25 First diode node for charge pump
CP2 24 First inverter switching node for charge pump
CP3 23 Second diode node for charge pump
CP4 26 Second 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.
LCOMP 6 Compensation capacitor terminal for left-channel Class-D amplifier
LINN 4 Class-D left-channel negative input
LINP 5 Class-D left-channel positive input
LOUTN 14, 15 Class-D amplifier left-channel negative output of H-bridge
LOUTP 10, 11 Class-D amplifier left-channel positive output of H-bridge
LPV

DD

9, 16 Class-D amplifier left-channel power supply

MUTE

2

Active-low 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

17, 18, 19,

30, 31, 32

No connection

PGND 12, 13 Power ground for left-channel H-bridge only
PGND 27 Power ground for charge pump only
PGND 36, 37 Power ground for right-channel H-bridge only
PV

DD

21, 28 VDD supply for charge-pump and gate-drive circuitry
RCOMP 43 Compensation capacitor terminal for right-channel Class-D amplifier
RINN 45 Class-D right-channel negative input
RINP 44 Class-D right-channel positive input
RPV

DD

33, 40 Class-D amplifier right-channel power supply
ROUTN 34, 35 Class-D amplifier right-channel negative output of H-bridge
ROUTP 38, 39 Class-D amplifier right-channel positive output of H-bridge

SHUTDOWN

1

Active-low logic-level shutdown input signal. When SHUTDOWN is held low, the device goes into shutdown mode.
When SHUTDOWN

is held at logic high, the device operates normally.
V2P5 29 2.5-V internal reference bypass
VCP 22 Storage capacitor terminal for charge pump

V

DD

8

VDD bias supply for analog circuitry. This terminal needs to be well filtered to prevent degrading the device
performance.