TDF8599A NXP Semiconductors, TDF8599A Datasheet - Page 19

• Manufacturer Part Number: TDF8599A
• Description: The TDF8599A is a dual Bridge-Tied Load (BTL) car audio amplifier comprising anNDMOST-NDMOST output stage based on SOI BCDMOS technology
• Manufacturer: NXP Semiconductors

NXP Semiconductors
TDF8599A_2
Product data sheet
The capacitor connected to pin SEL_MUTE (see
inaudible current test pulse, drawn from the positive amplifier output. The diagnostic
‘speaker load’ (or ‘open load’), based on the voltage difference between pins OUTxP and
OUTxN is shown in
Remark: DC load detection identifies a short circuited speaker as a valid speaker load.
OCP detection, using byte DB1[D3] for channel 1 and byte DB2[D3] for channel 2,
performs diagnostics on shorted loads. However, the diagnostics are performed after the
DC load detection cycle has finished and once the amplifier is in Operating mode.
The result of the DC load detection is stored in bits DB1[D4] and DB2[D4].
Fig 16. DC load detection circuit
Fig 17. DC load detection procedure
Fig 18. DC load detection limits
CONTROL
CONTROL
out
out+
Figure
PWM
PWM
out (V)
0
Rev. 02 — 30 June 2009
SPEAKER LOAD
18.
I
2
C-bus controlled dual channel class-D power amplifier
t
d(stb-mute)
DRIVER
DRIVER
DRIVER
DRIVER
HIGH
HIGH
LOW
LOW
25
350
B
PGND1
PGND2
Figure 3 on page
t
det(DCload)
V
V
P
P
OUTN
OUTP
OPEN LOAD
001aaj956
001aai788
001aai787
6) is used to create an
t (s)
TDF8599A
R L
© NXP B.V. 2009. All rights reserved.
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