Datasheet

CLASS D AMPLIFIER AC CHARACTERISTICS
TPA2014D1
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
TPA2014D1
www.ti.com ............................................................................................................................................................... SLAS559A – MAY 2008 – REVISED JUNE 2008
T
A
= 25 ° C, V
DD
= 3.6V, R
L
= 8 Ω + 33 µ H, L = 6.2 µ H, V
CC
= 5 V, Gain = 2 V/V(unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
KSVR Output referred power supply
V
DD
= 3.6 V, V
CC
= 5, 200 mV
PP
ripple, f = 217 Hz – 91 dB
Class-D rejection ratio
f = 1 kHz, P
o
= 1.2 W, V
CC
= 5 V 1%
THD+N
Total harmonic distortion + noise f = 1 kHz, P
o
= 1.5 W, V
CC
= 5 V 10%
Class-D
f = 1 kHz, P
o
= 1 W, V
CC
= 5 V 0.1%
Vn Output integrated noise floor Av = 6 dB (2V/V) 31
Class-D
µ Vrms
Output integrated noise floor
Av = 6 dB (2V/V) 23
A-weighted
THD+N = 10%, V
CC
= 5 V, V
DD
= 3.6V , 1.5
P
O
Maximum output power THD+N = 1%, V
CC
= 5 V, V
DD
= 3.6V , 1.2 W
THD+N = 0.1%, V
CC
= 5 V, V
DD
= 3.6V , 1
TEST SET-UP FOR GRAPHS
(1) C
I
was shorted for any common-mode input voltage measurement. All other measurements were taken with a 1- µ F C
I
(unless otherwise noted).
(2) A 33- µ H 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-k Ω ,
4.7-nF) is used on each output for the data sheet graphs.
(4) L = 6.2 µ H is used for the boost converter unless otherwise noted.
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