NXP Semiconductors
TFA9896
Boosted audio system with adaptive sound maximizer and speaker protection
TFA9896 All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2016. All rights reserved.
Product short data sheet Rev. 1 — 22 December 2016
COMPANY PUBLIC 11 / 22
11.2 AC characteristics
Table 7. AC characteristics
All parameters are guaranteed for V
BAT
= 3.6 V; V
DDD
= 1.8 V; V
DDP
= V
BST
= 6.1 V; L
BST
= 1 µH
[1]
; R
L
= 8 Ω
[1]
;
L
L
= 44 µH
[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
Amplifier
THD+N = 1 %; RCV = 0
R
L
= 4 Ω; V
BAT
= 4.0 V - 3.2 - W
R
L
= 8 Ω - 2.1 - W
THD+N = 10 %; RCV = 0
R
L
= 4 Ω; V
BAT
= 4.0 V - 4 - W
R
L
= 8 Ω - 2.55 - W
P
o(RMS)
RMS output power
THD+N = 1 %; RCV = 1 - 0.68 - W
R
L
load resistance of speaker 3.2 8 - Ω
|V
O(offset)
| output offset voltage absolute value - - 1 mV
ƞ
po
output power efficiency including DC-to-DC converter;
P
o(RMS)
= 2.1 W; V
BAT
= 4.0 V
[2]
- 83 - %
THD+N total harmonic distortion-plus-
noise
P
o(RMS)
= 100 mW; R
L
= 8 Ω; L
L
= 44 µH
[2]
- 0.03 0.1 %
A-weighted; DATAI1 = DATAI2 = 0 V
CoolFlux DSP disabled and bypassed - 27 - µV
CoolFlux DSP enabled
[2]
- 30 - µV
V
n(o)
output noise voltage
Receiver mode; V
DDP
≤ 4.3 V - 18 - µV
V
O
= 4.5 V (peak); A-weighted
CoolFlux DSP disabled and bypassed - 103 - dB
S/N signal-to-noise ratio
CoolFlux DSP enabled
[2]
- 100 - dB
PSRR power supply rejection ratio V
ripple
= 200 mV (RMS); f
ripple
= 217 Hz - 90 - dB
Current-sensing performanceS/N
S/N signal-to-noise ratio I
O
= 1.2 A (peak); A-weighted - 75 - dB
I
sense(acc)
sense current accuracy I
O
= 0.5 A (peak) -3 - +3 %
B bandwidth
[2]
- - 3 kHz
Timing
PLL locked on BCK (IPLL = 0)
f
s
= 32 kHz to 48 kHz - - 2 ms
PLL locked on FS (IPLL = 1)
t
d(on)
turn-on delay time
f
s
= 48 kHz - - 6 ms
t
d(off)
turn-off delay time - - 10 µs
t
d(mute_off)
mute off delay time - 1 - ms
