Datasheet

TPA2028D1
IN+
IN–
OUT+
OUT–
V
DD
V
DD
GND
C
I
C
I
Measurement
Output
+
+
–
–
Load
30kHz
Low-Pass
Filter
Measurement
Input
+
–
1 Fm
TPA2028D1
www.ti.com SLOS660B –JANUARY 2010–REVISED SEPTEMBER 2012
OPERATING CHARACTERISTICS
at T
A
= 25°C, V
DD
= 3.6V, EN = 1.3 V, R
L
= 8 Ω +33 μH, and A
V
= 6 dB (unless otherwise noted).
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
k
SVR
power-supply ripple rejection ratio V
DD
= 3.6 Vdc with ac of 200 mV
PP
at 217 Hz –70 dB
f
aud_in
= 1 kHz; P
O
= 550 mW; V
DD
= 3.6 V 0.1%
f
aud_in
= 1 kHz; P
O
= 1.25 W; V
DD
= 5 V 0.1%
THD+N Total harmonic distortion + noise
f
aud_in
= 1 kHz; P
O
= 710 mW; V
DD
= 3.6 V 1%
f
aud_in
= 1 kHz; P
O
= 1.4 W; V
DD
= 5 V 1%
Nfo
nF
Output integrated noise Av = 6 dB 42 μV
Nfo
A
Output integrated noise Av = 6 dB floor, A-weighted 30 μV
FR Frequency response Av = 6 dB 20 20000 Hz
THD+N = 10%, V
DD
= 5 V, R
L
= 8 Ω 1.72 W
THD+N = 10%, V
DD
= 3.6 V, R
L
= 8 Ω 880 mW
THD+N = 1%, V
DD
= 5 V, R
L
= 8 Ω 1.4 W
Po
max
Maximum output power
THD+N = 1% , V
DD
= 3.6 V, R
L
= 8 Ω 710 mW
THD+N = 1% , V
DD
= 5 V, R
L
= 4 Ω 2.5 W
THD+N = 10% , V
DD
= 5 V, R
L
= 4 Ω 3 W
THD+N = 1%, V
DD
= 3.6 V, R
L
= 8 Ω, P
O
= 0.71 W 91%
η Efficiency
THD+N = 1%, V
DD
= 5 V, R
L
= 8 Ω, P
O
= 1.4 W 93%
TEST SET-UP FOR GRAPHS
(1) All measurements were taken with a 1-μF C
I
(unless otherwise noted.)
(2) A 33-μH inductor was placed in series with the load resistor to emulate a small speaker for efficiency measurements.
(3) The 30-kHz low-pass filter is required, even if the analyzer has an internal low-pass filter. An RC low-pass filter (1 kΩ
4.7 nF) is used on each output for the data sheet graphs.
Copyright © 2010–2012, Texas Instruments Incorporated 5
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