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參數(shù)資料
| 型號(hào)： | TDA7476 |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 消費(fèi)家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PDSO24 |
| 封裝： | SOP-24 |
| 文件頁數(shù)： | 15/19頁 |
| 文件大?。?/td> | 161K |
| 代理商： | TDA7476 |
5/19
TDA7476
Aol
Open load det. (voltage across
the sensing resistor. Below this
limit the Aux pin is considered in
Open Load condition)This
condition must be true for a time
higher than Tdel
High side driver ON
0.085
V
Anop
Normal Operation det. (Voltage
across the sensing resistor.
Within these limits the load
resistance connected to the Aux
pin is considered correct)
0.125
0.5
V
PERMANENT DIAGNOSTIC - ACQUISITION TIME DELAY
Tdel
Acquisition time delay - The fault
is considered true if the fault
condition are present for more
than Tdel without interruption
2s
PERMANENT DIAGNOSTIC - WARNING PIN
Vsat
Saturation voltage on pin 5
Sink Current at Pin 5 = 1mA
1
V
ADDRESS SELECT
VADD
Voltage on pin 4
Address 0100010X
1.5
V
Address 0100011X
3
5
V
I2C BUS INTERFACE
fSCL
Clock Frequency
400
KHz
VIL
Input Low Voltage
1.5
V
VIH
Input High Voltage
3
V
VSAT
Sat Voltage at pin 2
Sink Current at Pin 2 = 5mA
1.5
V
ELECTRICAL CHARACTERISTICS (continued)
(Vs = 14.4V; Tamb = 25°, unless otherwise specified.)
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
WORKING PRINCIPLES
Turn-on diagnostic - CH1, CH2, CH3, CH4, CH5 -
Shorted load/open load detection
s
To detect a short across the load or an open
load, a subsonic current pulse is generated. The
information related to the status of the outputs is
measured and memorized at the top of the
current pulse (tm in fig.1). The current is
sourced by the positive pins (CH1+,...CH5+)
and it is sunk by the corresponding negative
pins (CH1-,...CH5-).
Figure 1.
tm
ts
t(ms)
ISOURCE
ISINK
I(mA)
D97AU571
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