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參數(shù)資料
| 型號： | TA8266HQ |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 23 W, 4 CHANNEL, AUDIO AMPLIFIER, PZFM25 |
| 封裝： | 1 MM PITCH, PLASTIC, HZIP-25 |
| 文件頁數(shù)： | 7/16頁 |
| 文件大?。?/td> | 314K |
| 代理商： | TA8266HQ |
TDF8544
All information provided in this document is subject to legal disclaimers.
NXP B.V. 2011. All rights reserved.
Objective data sheet
Rev. 1 — 10 August 2011
15 of 54
NXP Semiconductors
TDF8544
I2C-bus controlled 4
50 W power amplifier
The load detection values are shown in Figure 11.
If only 4
speakers are connected, the low gain mode can be selected during the start-up
diagnostics. A shorted load is indicated until an impedance of 1.5
is reached. Even ‘soft’
shorts in the wiring harness will be detected.
Fig 10. Principle of start-up diagnostics
Fig 11. Start-up diagnostics load detection levels
(1) First stage: open load/load/line driver load; short across the load.
(2) Second stage: amplifier start plus short to ground/VP; speaker fault.
Fig 12. Start-up with start-up diagnostics
COMPARATORS
SPIKE
FILTER
DOOR-SLAM
PROCESSOR
OFFSET
GENERATOR
I2C-BUS BITS
LOAD CONDITION
001aam697
out +
out
SHORTED
NORMAL
LINE DRIVER
OPEN
0.5
Ω
1.5
Ω
high gain
low gain
1.5
Ω
3.2
Ω
20
Ω
20
Ω
80
Ω
80
Ω
200
Ω
200
Ω
400
Ω
400
Ω
001aaam698
001aam699
td(sudiag-on)
tsudiag
tamp_on
(2)
(1)
IB1[D1]
turn on diagnostic
enable
STB
amplifier
output
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