TFA9881_1104 PHILIPS [NXP Semiconductors], TFA9881_1104 Datasheet - Page 6

• Manufacturer Part Number: TFA9881_1104
• Description: 3.4 W PDM input class-D audio amplifier
• Manufacturer: PHILIPS [NXP Semiconductors]

NXP Semiconductors
TFA9881
Product data sheet
Fig 6.
V
V
CLK
DATA
OUTA ,
OUTB
DDP ,
DDD
Power-down
Power-up/power-down sequence
8.3 Power up/down sequence
t
d(on)
128·f
s
Table 5.
The TFA9881 power-up/power-down sequence is shown in
supplies V
switches to Operating mode. The TFA9881 should be switched to Power-down mode
before the power supplies are disconnected or turned off.
Table 6.
All parameters are guaranteed for V
f
[1]
[2]
or 64·f
LRSEL pin state
LOW
HIGH
Symbol
t
t
i
d(on)
d(off)
Fig 5.
= 1 kHz; f
PDM
Operating
R
Inversely proportional to f
switching
s
L
clock signal
= load resistance; L
Digital stereo PDM selection
clk
DDP
Left/right selection
32 times
0x66
Power-up/power-down timing
Parameter
turn-on delay time
turn-off delay time
= 6.144 MHz; T
and V
All information provided in this document is subject to legal disclaimers.
0x66 .......
floating
Mute
DDD
DATA
L
CLK
= load inductance.
clk
Rev. 2 — 1 April 2011
should be within their operating limits before the TFA9881
.
amb
PDM
switching
Operating
= 25
TEST
32 times
0xAC
°
128 × 0xAC
C; default settings, unless otherwise specified.
= V
Conditions
96 times
0xAC
DDP
LEFT
floating
Mute
= 3.6 V; V
Description
left content amplified
right content amplified
3.4 W PDM input class-D audio amplifier
Power-down
0xAC .......
DDD
RIGHT
[2]
[2]
= 1.8 V; R
t
Min
-
-
PDM
d(on)
Figure
010aaa702
Operating
switching
L
Typ
-
-
6. External power
= 4
t
Ω
d(off)
TFA9881
© NXP B.V. 2011. All rights reserved.
[1]
Power-down
; L
Max
2
5
L
010aaa710
= 20
μ
Unit
ms
μs
H
6 of 32
[1]
;