Texas Instruments TPA005D14DCAR, TPA005D14DCA, TPA005D14EVM Datasheet
TPA005D14
2-W STEREO CLASS-D AUDIO POWER AMPLIFIER
SLOS240A – AUGUST 1999 – REVISED MARCH 2000
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
D
Choose TPA2000D2 For Upgrade
D
Extremely Efficient Class-D Stereo
Operation
D
Drives L and R Channels, Plus Stereo
Headphones
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
Class-AB Headphone Amplifier
D
Thermally-Enhanced PowerP AD Surface
Mount Packaging
D
Thermal, Over-Current, and Under-V oltage
Protection
description
The TPA005D14 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 TPA005D14 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 0.4% 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.
Included is a Class-AB headphone amplifier with interface logic to select between the two modes of operation.
Only one amplifier is active at any given time, and the other is in power-saving sleep mode. Also, 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 A005D14 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 TPA005D14 is offered in the thermally enhanced 48-pin PowerPAD TSSOP surface-mount package
(designator DCA).
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
MODE
LINN
LINP
LCOMP
AGND
V
DD
LPV
DD
LOUTP
LOUTP
PGND
PGND
LOUTN
LOUTN
LPV
DD
HPDL
HPLOUT
HPLIN
AGND
PV
DD
VCP
CP3
CP2
COSC
AGND
AGND
RINN
RINP
RCOMP
FAULT0
FAULT1
RPV
DD
ROUTP
ROUTP
PGND
PGND
ROUTN
ROUTN
RPV
DD
HPDR
HPROUT
HPRIN
V2P5
PV
DD
PGND
CP4
CP1
1
2
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)
TPA005D14
2-W STEREO CLASS-D AUDIO POWER AMPLIFIER
SLOS240A – 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
DD
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
MODE
MUTE
V2P5
HPLIN
HPLOUT
HPROUT
HPRIN
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
HP
DEPOP
HPDL
HPDR
LPV
DD
RPV
DD
NOTE A: LPVDD, RPVDD, VDD, and PVDD are externally connected. AGND and PGND are externally connected.
schematic
TPA005D14
2-W STEREO CLASS-D AUDIO POWER AMPLIFIER
SLOS240A – AUGUST 1999 – REVISED MARCH 2000
3
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
Terminal Functions
TERMINAL
NAME NO.
DESCRIPTION
AGND
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.
HPDL 17 Depop control for left headphone
HPDR 32 Depop control for right headphone
HPLIN 19 Headphone amplifier left input
HPLOUT 18 Headphone amplifier left output
HPRIN 30 Headphone amplifier right input
HPROUT 31 Headphone amplifier right 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
MODE 3
Logic-level mode input signal. When MODE is held low, the main Class-D amplifier is active. When MODE is held
high, the head phone amplifier is active.
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.
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.
TPA005D14
2-W STEREO CLASS-D AUDIO POWER AMPLIFIER
SLOS240A – AUGUST 1999 – REVISED MARCH 2000
4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
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. FAULT1 is
cleared by cycling MUTE
, SHUTDOWN, or the power supply.
1 0 Over-current fault — The output transistors are all switched off. This causes the load to be in a high-impedance state.
This is a latched fault and 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. This is latched fault and is
cleared by cycling MUTE
, SHUTDOWN, or the power supply.
†
These logic levels assume a pullup to PVDD from the open-drain outputs.
headphone amplifier faults
The thermal fault remains active when the device is in head phone mode. This fault operates exactly the same
as it does for the Class-D amplifier (see Table 1).
If LPVDD or RPV
DD
drops below 4.5 V , the headphone is disabled by the under-voltage lockout circuitry . Once
LPVDD and RPVDD exceed 4.5 V, the headphone amplifier is re-enabled. No fault is reported to the user.
AVAILABLE OPTIONS
PACKAGED DEVICES
T
A
TSSOP
†
(DCA)
–40°C to 125°C TPA005D14DCA
†
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.,
TPA005D14DCAR).
TPA005D14
2-W STEREO CLASS-D AUDIO POWER AMPLIFIER
SLOS240A – AUGUST 1999 – REVISED MARCH 2000
5
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
absolute maximum ratings over operating free-air temperature range, TC = 25°C (unless otherwise
noted)
‡
Supply voltage, VDD (PVDD, LPVDD, RPVDD, VDD) 5.5 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input voltage, VI (SHUTDOWN, MUTE, MODE) –0.3 V to 5.8 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output current, IO (FAULT0, FAULT1), open drain terminated 1 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Charge pump voltage, VCP PVDD + 15 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Continuous H-bridge output current 2 A. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pulsed H-Bridge output current, each output, I
max
(see Note 1) 5 A. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Continuous total power dissipation See Dissipation Ratings Table. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating virtual junction temperature range, TJ –40°C to 150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating case temperature range, TC –40°C to 125°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage temperature range, T
stg
–40°C to 150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds 260°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
†
Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTE 1: Pulse duration = 10 ms, duty cycle v 2%
DISSIPATION RATING TABLE
PACKAGE
TA ≤ 25°C
‡
POWER RATING
DERATING FACTOR
ABOVE TA = 25°C
TA = 70°C
POWER RATING
TA = 85°C
POWER RATING
TA = 125°C
POWER RATING
DCA 5.6 W 44.8 mW/°C 3.6 W 2.9 W 1.1 mW
‡
See the Texas Instruments document,
PowerPAD Thermally Enhanced Package Application Report
(literature number
SLMA002), for more information on the PowerP AD package. The thermal data was measured on a PCB layout based on the
information in the section entitled
T exas Instruments Recommended Board for PowerP AD
on page 33 of the before mentioned
document.
recommended operating conditions
MIN NOM MAX UNIT
Supply voltage, PVDD, LPVDD, RPVDD, V
DD
4.5 5.5 V
High-level input voltage, VIH (MUTE, MODE, SHUTDOWN) 4.25 V
Low-level input voltage, VIL (MUTE, MODE, SHUTDOWN) 0.75 V
Audio inputs, LINN, LINP, RINN, RINP, HPLIN, HPRIN, differential input voltage 1 V
RMS
PWM frequency 150 450 kHZ
electrical characteristics, Class-D amplifier, VDD = PVDD = LPVDD = RPVDD = 5 V, RL = 4 Ω,
T
A
= 25°C, See Figure 1 (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
Power supply rejection ratio VDD = PVDD = LPVDD = RPVDD = 4.5 V to 5.5 V –40 dB
I
DD
Supply current No output filter connected 25 35 mA
IDD(MUTE) Supply current, mute mode MUTE = 0 V 3.9 10 mA
IDD(SD) Supply current, shutdown mode SHUTDOWN = 0 V 0.2 10 µA
I
IH
High-level input current VIH = 5.3 V 1 µA
I
IL
Low-level input current VIL = –0.3 V –1 µA
r
DS(on)
Total static drain-to-source on-state
resistance (low-side plus high-side
FETs)
ID = 0.5 A 700 900 mΩ
r
DS(on)
Matching, high-side to high-side,
low-side to low-side, same channel
ID = 0.5 A 95% 98%
TPA005D14
2-W STEREO CLASS-D AUDIO POWER AMPLIFIER
SLOS240A – AUGUST 1999 – REVISED MARCH 2000
6
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
operating characteristics, Class-D amplifier, VDD = PVDD = LPVDD = RPVDD = 5 V, RL = 4 Ω,
T
A
= 25°C, See Figure 1 (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
P
O
RMS output power
f = 1 kHz, THD = 0.5%,
Per channel
2 W
THD+N Total harmonic distortion plus noise PO = 1 W, f = 1 kHz 0.2%
Efficiency PO = 1 W, RL = 8 Ω 80%
A
V
Gain 20 dB
Left/right channel gain matching 95% 99%
Noise floor –55 dBV
Dynamic range 70 dB
Crosstalk f = 1 kHz –55 dB
Frequency response bandwidth, post output filter, –3 dB 20 20000 Hz
B
OM
Maximum output power bandwidth 20 kHz
Z
I
Input impedance 10 kΩ
electrical characteristics, headphone amplifier, PVDD = LPVDD= RPVDD = 5 V , RL = 32 Ω, TA = 25°C,
See Figure 3 (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
Power supply rejection ratio PVDD = 4.5 V to 5.5 V,
AV = –1 V/V
–60 dB
Uncompensated gain range –1 –10 V/V
I
DD
Supply current 8 10 mA
IDD(MUTE) Supply current, mute mode 1.5 2 mA
IDD(SD) Supply current, shutdown mode 0.2 10 µA
I
IB
Input bias current 30 µA
operating characteristics, headphone amplifier, PVDD = LPVDD = RPVDD = 5 V , RL = 32 Ω, TA = 25°C,
See Figure 3 (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
P
O
Output power
THD = 0.5%, f = 1 kHz,
AV = –10V/V
50 mW
Supply voltage rejection ratio f = 1 kHz –60 dB
Noise floor –84 dBV
Dynamic range 90 dB
Crosstalk f = 1 kHz –38 dB
Frequency response bandwidth, post output filter, –3 dB 20 20000 Hz
B
OM
Maximum output power bandwidth 20 kHz
Z
I
Input impedance >1 MΩ
thermal shutdown
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
Thermal shutdown temperature 165 °C
TPA005D14
2-W STEREO CLASS-D AUDIO POWER AMPLIFIER
SLOS240A – AUGUST 1999 – REVISED MARCH 2000
7
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
PARAMETER MEASUREMENT INFORMATION
LINP
LINN
LCOMP
V
DD
COSC
RCOMP
RINP
RINN
RPV
DD
AGND (see Note A)
LPV
DD
PV
DD
SHUTDOWN
V2P5
HPLIN
HPLOUT
HPROUT
HPRIN
PGND (see Note A)
15 µH
15 µH
0.22 µF
0.22 µF
1 µF
4 Ω
5 V
5 V
1 µF
1 µF
Balanced
Differential
Input Signal
470 pF
470 pF
470 pF
1 µF
1 µF
Balanced
Differential
Input Signal
5 V
CP1
CP2
CP3
CP4
VCP
FAULT0
FAULT1
MODE
MUTE
PV
DD
PV
DD
1 µF
LOUTP
LOUTN
15 µH
15 µH
0.22 µF
0.22 µF
1 µF
4 Ω
ROUTP
ROUTN
47 nF
47 nF
0.1 µF
42
1
2
3
9,16
5
4
6
43
48
44
45
33,40
7,20,46,47
12,13,27,36,37
21, 28
19
30
41
14,15
10,11
29
8
18
31
25
24
23
26
22
34,35
38,39
HPDL
17
HPDR
32
Figure 1. 5-V, 4-Ω Test Circuit, Class-D Amplifier
TPA005D14
2-W STEREO CLASS-D AUDIO POWER AMPLIFIER
SLOS240A – AUGUST 1999 – REVISED MARCH 2000
8
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
PARAMETER MEASUREMENT INFORMATION
LINP
LINN
LCOMP
V
DD
COSC
RCOMP
RINP
RINN
RPV
DD
AGND
LPV
DD
PV
DD
SHUTDOWN
HPDR
V2P5
HPLIN
HPLOUT
HPROUT
HPRIN
PGND
5 V
5 V
470 pF
470 pF
470 pF
5 V
CP1
CP2
CP3
CP4
VCP
FAULT0
FAULT1
MODE
MUTE
1 µF
LOUTP
LOUTN
ROUTP
ROUTN
47 nF
0.1 µF
42
1
2
3
9,16
5
4
6
43
48
44
45
33,40
7,20,46,47
12,13,27,36,37
21, 28
19
30
41
14,15
10,11
29
8
18
31
32
25
24
23
26
22
34,35
38,39
5 V
5 V
5 V
Left SE
HP Input
HPLOUT
100 kΩ
100 kΩ
0.1 µF
Right SE
HP Input
100 kΩ
0.1 µF
100
kΩ
32 Ω
220 µF
220 µF
32 Ω
5 V
HPROUT
47 nF
HPDL
17
Figure 2. Headphone Test Circuit
TPA005D14
2-W STEREO CLASS-D AUDIO POWER AMPLIFIER
SLOS240A – AUGUST 1999 – REVISED MARCH 2000
9
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
PARAMETER MEASUREMENT INFORMATION
LINP
LINN
LCOMP
V
DD
COSC
RCOMP
RINP
RINN
RPV
DD
AGND
LPV
DD
PV
DD
SHUTDOWN
V2P5
HPLOUT
HPROUT
PGND
15 µH
15 µH
0.22 µF
0.22 µF
1 µF
4 Ω
5 V
5 V
1 µF
1 µF
Left Class-D Balanced
Differential Input
Signal
470 pF
470 pF
470 pF
1 µF
1 µF
HPDR
HPDL
CP1
CP2
VCP
FAULT0
FAULT1
MODE
MUTE
1 µF
LOUTP
LOUTN
15 µH
15 µH
0.22 µF
0.22 µF
1 µF
4 Ω
ROUTP
ROUTN
47 nF
0.1 µF
42
1
2
3
9,16
5
4
6
43
48
44
45
33,40
7,20,46,47
12,13,27,36,37
21, 28
41
14,15
10,11
29
8
18
31
32
17
25
24
22
34,35
38,39
5 V
HPLIN
HPRIN
19
30
Left SE
HP Input
HPLOUT
100 kΩ
100 kΩ
0.1 µF
Right SE
HP Input
100 kΩ
0.1 µF
100
kΩ
To System
Control
100 kΩ
1 µF1 µF
10 µF
Right Class-D Balanced
Differential Input
Signal
5 V
1 µF1 µF
10 µF
1 µF
100 kΩ
100 kΩ
To System
Control
1 µF
100 kΩ
5 V
MODE
1 kΩ1 kΩ
NOTE A: = power ground and = analog ground
HPROUT
220 µF
220 µF
5 V
CP3
CP4
47 nF
23
26
Figure 3. TPA032D04 Typical Configuration Application Circuit
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