Datasheet

DC CHARACTERISTICS
TPA2014D1
www.ti.com ............................................................................................................................................................... SLAS559A – MAY 2008 – REVISED JUNE 2008
T
A
= 25 ° C (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
Class-D audio power amplifier
V
CC
3 5.5 V
voltage supply range, V
CC
IN
SDd = SDb = 0 V, V
DD
= 2.5 V, R
L
= 8 Ω 0.04 1.5
SDd = SDb = 0 V, V
DD
= 3.6 V, R
L
= 8 Ω 0.04 1.5
SDd = SDb = 0 V, V
DD
= 4.5 V, R
L
= 8 Ω 0.02 1.5
I
SD
Shutdown quiescent current µ A
SDd = SDb = 0.35 V, V
DD
= 2.5 V, R
L
= 8 Ω 0.03 1.5
SDd = SDb = 0.35 V, V
DD
= 3.6 V, R
L
= 8 Ω 0.03 1.5
SDd = SDb = 0.35 V, V
DD
= 4.5 V, R
L
= 8 Ω 0.02 1.5
Boost converter quiescent SDd = 0 V, SDb = 1.3 V, V
DD
= 3.6 V, V
CC
= 5.5 V,
I
DD
1.3 mA
current No Load, No Filter
V
DD
= 3.6, V
cc
= 5.5 V, No Load, No Filter 4.3 6
Class D amplifier quiescent
I
CC
mA
current
V
DD
= 4.5, V
cc
= 5.5 V, No Load, No Filter 3.6 6
SDd = SDb = 1.3V, V
DD
= 3.6, V
cc
= 5.5 V,
16.5 23
Boost converter and audio
No Load, No Filter
I
DD
power amplifier quiescent mA
SDd = SDb = 1.3V, V
DD
= 4.5, V
cc
= 5.5 V,
current, Class D
(1)
11 18.5
No Load, No Filter
Boost converter switching 500 600 700 kHz
frequency
f
Class D switching frequency 250 300 350 kHz
UVLO Under voltage lockout 1.7 V
Gain input low level Gain = 2 V/V (6dB) 0 0.35 V
GAIN Gain input mid level Gain = 6 V/V (15.5 dB) (floating input) 0.7 0.8 1 V
Gain input high level Gain = 10 V/V (20 dB) 1.35 V
Class D Power on reset ON
POR
D
2.8 V
threshold
(1) I
DD
is calculated using I
DD
= (I
CC
× V
CC
)/(V
DD
× η ), where I
CC
is the class D amplifier quiescent current; η = 40%, which is the boost
converter efficiency when class D amplifier has no load. To achieve the minimal 40% η , it is recommended to use the suggested
inductors in table 4 and to follow the layout guidelines.
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