TFA9892_SDS All information provided in this document is subject to legal disclaimers. © NXP B.V. 2017. All rights reserved.
Product short data sheet Rev. 1.0 — 1 September 2017 13 of 27
NXP Semiconductors
TFA9892
12 V boosted audio system with adaptive sound maximizer and
speaker protection
[1] L
BST
= boost converter inductance; R
L
= load resistance; L
L
= load inductance (speaker).
[2] This parameter is not tested during production; the value is guaranteed by design and checked during product validation.
[3] If BOD is enabled min VDDD range goes to 1.7 V
11.2 AC characteristics
I
O(ocp)
overcurrent protection output
current
2-- A
DC-to-DC converter
V
BST
maximum voltage on pin VBST Maximum boost voltage setting 11.8 12 12.2 V
Table 6. DC characteristics
…continued
All parameters are guaranteed for V
BAT
= 3.6 V; V
DDD
= 1.8 V; V
DDP
=V
BST
= 12 V, adaptive boost mode; L
BST
=1
H
[1]
;
R
L
=8
[1]
; L
L
=40
H
[1]
; f
i
= 1 kHz; f
s
= 48 kHz; T
amb
=25
C; default settings, unless otherwise specified.
Symbol Parameter Conditions Min Typ Max Unit
Table 7. AC characteristics
All parameters are guaranteed for V
BAT
=3.6V; V
DDD
=1.8V; V
DDP
=V
BST
= 12 V, adaptive boost mode; L
BST
=1
H
[1]
;
R
L
=8
[1]
; L
L
=40
H
[1]
; f
i
= 1 kHz; f
s
=48kHz; T
amb
=25
C; default settings, unless otherwise specified.
Symbol Parameter Conditions Min Typ Max Unit
Amplifier output power
P
o(AV)
average output power Hands-free speaker THD+N = 1 %;
V
BAT
=4V
R
L
=8 ; V
BST
=12V 6.6 W
R
L
=6 ; V
BST
=10V 6.6 W
R
L
=4 ; V
BST
=8.5V 6.7 W
Hands-free speaker THD+N = 10 %;
V
BAT
=4V
R
L
=8 ; V
BST
=12V 8 W
Handset speaker THD+N = 1 %;
V
BST
=12V; V
BAT
=4V
2W
Amplifier output; pins OUTA and OUTB
V
O(offset)
output offset voltage absolute value - - 0.5 mV
Amplifier performance
po
output power efficiency P
o(RMS)
= 2.5 W; including DC-to-DC
converter; 100 Hz audio signal
[2]
-80-%
THD+N total harmonic distortion-plus-noise P
o(RMS)
=100mW; R
L
=8 ; L
L
=44H
[1]
--0.1%
V
n(o)
output noise voltage A-weighted; no output signal;
CoolFlux DSP bypassed;
Handset mode; BCK clock jitter < 1 ns
(PLL locked on BCK)
-16-V
DR dynamic range V
O
= 10 V (peak); A-weighted - 115 - dB
S/N signal-to-noise ratio V
O
= 10 V (peak); A-weighted - 100 - dB
PSRR power supply rejection ratio V
ripple
= 200 mV (RMS); f
ripple
=217Hz - 75 - dB
f
sw
switching frequency directly coupled to the TDM FS input
frequency
256 - 384 kHz
G
(I2S-VO)
I
2
S to V
O
gain Coolflux DSP bypassed, measured at
input level -12 dBFS; TDMSPKG = 0 dB
-21-dB
V
POP
pop noise voltage At mode transition and gain change 2 mV
