TDF8554J NXP Semiconductors, TDF8554J Datasheet - Page 31

• Manufacturer Part Number: TDF8554J
• Description: The TDF8554J is one of a new generation of complementary quad Bridge-Tied Load(BTL) audio power amplifiers with full I²C-bus controlled diagnostics, multiple voltageregulator and two power switches intended for automotive applications
• Manufacturer: NXP Semiconductors

NXP Semiconductors
TDF8554J
Product data sheet
[1]
Table 20.
Table 21.
Bit
4
3
2
1
0
Bit
7
6
5
4
3
2
1
7
6
5
When IB5[D3] = 1 (read out of the speaker fault), the shorted load protection still operates. If a shorted load
occurs, the channel switches off for 15 ms, an internal latch is set and pin DIAG is pulled LOW. The shorted
load internal latch (DBx[D3]) can be read when IB5[D3] = 0. Data bits are only reset (cleared after read)
after reading all 4 data bytes.
Symbol
D7
D6
D5
D4
D3
D2
D1
Data byte DB2 bit description
Data byte DB3 bit description
Symbol
D7
D6
D5
D4
D3
D2
D1
D0
All information provided in this document is subject to legal disclaimers.
Rev. 1 — 31 August 2011
Description
supply undervoltage (level set by IB4[D6])
supply overvoltage
channel 3 load detection results; see
channel 3 diagnostic results; see
channel 3 output offset
channel 3 V
0 = no supply undervoltage has occurred
1 = supply undervoltage has occurred
0 = no supply overvoltage has occurred
1 = supply overvoltage has occurred
0 = no output offset
1 = output offset
0 = no short-circuit to V
1 = short-circuit to V
4 45 W power amplifier with multiple voltage regulator
Description
enable or disable amplifier
regulator thermal protection pre-warning
channel 2 load detection results; see
channel 2 diagnostic results; see
channel 2 output offset
channel 2 V
channel 2 short-circuit to ground detection
0 = amplifier on
1 = POR has occurred; amplifier off
0 = no warning
1 = regulator temperature too high; amplifier off
0 = no output offset
1 = output offset
0 = no short-circuit to V
1 = short-circuit to V
0 = no short-circuit to ground
1 = short-circuit to ground
P
short-circuit detection
P
short-circuit detection
P
P
P
P
Table 19
Table 18
Table 19
Table 18
TDF8554J
© NXP B.V. 2011. All rights reserved.
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