TPA2001D2
1-W FILTERLESS STEREO CLASS-D AUDIO POWER AMPLIFIER
SLOS292A – MARCH 2000 – REVISED APRIL 2000
Modulation Scheme Optimized to Operate
Without a Filter
1 W Into 8-Ω Speakers (THD+N< 0.4%)
< 0.08% THD+N at 0.5 W, 1 kHz, Into 8-Ω
Load
Extremely Efficient 3
Class-D Technology:
– Low Supply Current (No Filter) ...8 mA
– Low Supply Current (Filter) ...15 mA
– Low Shutdown Current ...1 µA
– Low Noise Floor ...56 µV
– Maximum Efficiency Into 8 Ω, 75 – 85%
– 4 Internal Gain Settings ...8 – 23.5 dB
– PSRR . . . –77 dB
rd
Generation 5-V
RMS
PGND
LOUTN
GAIN0
PV
DD
LINN
AGND
COSC
RINN
PV
DD
SHUTDOWN
ROUTN
PGND
PWP PACKAGE
(TOP VIEW)
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
Integrated Depop Circuitry
Short-Circuit Protection (Short to Battery,
Ground, and Load)
–40°C to 85°C Operating Temperature
Range
description
The TPA2001D2 is the third generation 5-V class-D amplifier from Texas Instruments. Improvements to
previous generation devices include: lower supply current, lower noise floor, better ef ficiency , four different gain
settings, smaller packaging, and fewer external components. The most significant advancement with this device
is its modulation scheme that allows the amplifier to operate without the output filter. Eliminating the output filter
saves the user approximately 30% in system cost and 75% in PCB area.
PGND
LOUTP
BYPASS
PV
DD
LINP
V
DD
ROSC
RINP
PV
DD
GAIN1
ROUTP
PGND
The TPA2001D2 is a monolithic class-D power IC stereo audio amplifier, using the high switching speed of
power MOSFET transistors. These transistors reproduce the analog signal through high-frequency switching
of the output stage. The TPA2001D2 is configured as a bridge-tied load (BTL) amplifier capable of delivering
greater than 1 W of continuous average power into an 8-Ω load at less than 0.6% THD+N from a 5-V power
supply in the high fidelity range (20 Hz to 20 kHz). With 1 W being delivered to an 8-Ω load at 1 kHz, the typical
THD+N is less than 0.08%.
A BTL configuration eliminates the need for external coupling capacitors on the output. Low supply current of
8 mA makes the device ideal for battery-powered applications. Protection circuitry increases device reliability:
thermal, over-current, and under-voltage shutdown.
Efficient class-D modulation enables the TPA2001D2 to operate at full power into 8-Ω loads at an ambient
temperature of 85°C.
AVAILABLE OPTIONS
PACKAGED DEVICE
TSSOP (PWP)
Copyright 2000, Texas Instruments Incorporated
–40°C to 85°C TPA2001D2PWP
NOTE: The PWP package is available taped and reeled. To
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.
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.
T
A
order a taped and reeled part, add the suffix R to the
part number (e.g., TPA2001D2PWPR).
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
1
TPA2001D2
1-W FILTERLESS STEREO CLASS-D AUDIO POWER AMPLIFIER
SLOS292A – MARCH 2000 – REVISED APRIL 2000
functional block diagram
RINN
RINP
SHUTDOWN
GAIN1
GAIN0
COSC
ROSC
BYPASS
LINP
Gain
2
Gain
Adjust
_
+
_
+
Gain
Adjust
Biases
and
References
Gain
Adjust
DD
V
DD
Ramp
Generator
AGNDV
PV
DD
+
_
_
+
Protection
Thermal VDD ok
+
_
Start-up
Logic
Gate
Drive
Gate
Drive
Gate
Drive
OC
Detect
OC
Detect
ROUTN
PGND
PV
DD
ROUTP
PGND
PV
DD
LOUTP
LINN
_
+
Gain
Adjust
+
_
_
+
Gate
Drive
PGND
PV
DD
LOUTN
PGND
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TPA2001D2
1-W FILTERLESS STEREO CLASS-D AUDIO POWER AMPLIFIER
SLOS292A – MARCH 2000 – REVISED APRIL 2000
Terminal Function
TERMINAL
NAME NO.
AGND 6 – Analog ground
BYPASS 22 I Tap to voltage divider for internal midsupply bias generator used for analog reference.
COSC 7 I
GAIN0 3 I Bit 0 of gain control (TTL logic level)
GAIN1 15 I Bit 1 of gain control (TTL logic level)
LINN 5 I Left channel negative differential audio input
LINP 20 I Left channel positive differential audio input
LOUTN 2 O Left channel negative audio output
LOUTP 23 O Left channel positive audio output
PGND
PV
DD
RINN 8 I Right channel negative differential audio input
RINP 17 I Right channel positive differential audio input
ROSC 18 I
ROUTN 11 O Right channel negative audio output
ROUTP 14 O Right channel positive output
SHUTDOWN 10 I
V
DD
1, 24 – Power ground for left channel H-bridge
12, 13 – Power ground for right channel H-bridge
4, 21 – Power supply for left channel H-bridge
9, 16 – Power supply for right channel H-bridge
I/O
A capacitor connected to this terminal sets the oscillation frequency in conjunction with ROSC. For proper
operation, connect a 220 pF capacitor from COSC to ground.
A resistor connected to this terminal sets the oscillation frequency in conjunction with COSC. For proper
operation, connect a 120 kΩ resistor from ROSC to ground.
Places the amplifier in shutdown mode if a TTL logic low is placed on this terminal; normal operation if a TTL
logic high is placed on this terminal.
19 – Analog power supply
DESCRIPTION
absolute maximum ratings over operating free-air temperature (unless otherwise noted)
†
Supply voltage, VDD, PVDD –0.3 V to 6 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input voltage, VI –0.3 V to VDD+0.3 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Continuous total power dissipation See Dissipation Rating Table. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating free-air temperature range, T
Operating junction temperature range, T
Storage temperature range, T
stg
–40°C to 85°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A
–40°C to 150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
J
–65°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.
DISSIPATION RATING TABLE
PACKAGE
PWP 2.7 W 21.8 mW/°C 1.7 W 1.4 W
TA ≤ 25°C
POWER RATING
DERATING FACTOR
ABOVE TA = 25°C
TA = 70°C
POWER RATING
TA = 125°C
POWER RATING
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
3
TPA2001D2
GAIN0
GAIN1
1-W FILTERLESS STEREO CLASS-D AUDIO POWER AMPLIFIER
SLOS292A – MARCH 2000 – REVISED APRIL 2000
recommended operating conditions
MIN MAX UNIT
Supply voltage, VDD, PV
High-level input voltage, V
Low-level input voltage, V
Operating free-air temperature, T
PWM Frequency 200 300 kHz
DD
IL
IH
GAIN0, GAIN1, SHUTDOWN 2 V
GAIN0, GAIN1, SHUTDOWN 0.8 V
A
electrical characteristics, TA = 25°C, VDD = PVDD = 5 V (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
| VOO | Output offset voltage (measured differentially) VI = 0 V 10 mV
PSRR Power supply rejection ratio VDD=PVDD = 4.5 V to 5.5 V –77 dB
I
IH
I
IL
I
DD
I
DD
I
DD(SD)
High-level input current VDD=PVDD = 5.5 V, VI = VDD = PV
Low-level input current VDD=PVDD = 5.5 V, VI = 0 V –1 µA
Supply current No filter (with or without speaker load) 8 10 mA
Supply current
Supply current, shutdown mode 1 10 µA
With filter, L = 22 µH, C = 1 µF
DD
4.5 5.5 V
–40 85 °C
1 µA
15 mA
operating characteristics, TA = 25°C, VDD = PVDD = 5 V , RL = 8 Ω, Gain = 8 dB (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
P
O
THD+N Total harmonic distortion plus noise PO = 0.5 W, f = 20 Hz to 20 kHz <0.2%
B
OM
k
SVR
SNR Signal-to-noise ratio 20 Hz to 20 kHz 87 dBV
Z
I
Output power THD = 0.4%, f = 1 kHz, RL = 8 Ω 1 W
Maximum output power bandwidth THD = 5% 20 kHz
Supply ripple rejection ratio f = 1 kHz, C
Integrated noise floor 20 Hz to 20 kHz, No input 56
Input impedance >20 kΩ
(BYPASS)
= 0.4 µF –60 dB
µV
Table 1. Gain Settings
AMPLIFIER GAIN
GAIN0 GAIN1
0 0 8 104
0 1 12 74
1 0 17.5 44
1 1 23.5 24
(dB)
TYP TYP
INPUT IMPEDANCE
(kΩ)
4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265