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參數(shù)資料
| 型號(hào)： | TLE6220GP |
| 廠商： | INFINEON TECHNOLOGIES AG |
| 英文描述： | Smart Quad Low-Side Switch |
| 中文描述： | 智能四低邊開關(guān) |
| 文件頁數(shù)： | 11/17頁 |
| 文件大?。?/td> | 739K |
| 代理商： | TLE6220GP |
Data Sheet TLE 6220 GP
V1.1
Page
26.Aug. 2002
11
Diagnostics
FAULT
tion as soon as an error occurs for any one of the four channels. This fault indication can be
used to generate a μC interrupt. Therefore a ‘diagnosis’ interrupt routine need only be called
after this fault indication. This saves processor time compared to a cyclic reading of the SO
information.
- Fault pin. There is a general fault pin (open drain) which shows a high to low transi-
As soon as a fault occurs, the fault information is latched into the diagnosis register. A new
error will over-write the old error report. Serial data out pin (SO) is in a high impedance state
when
CS
is high. If
CS
receives a LOW signal, all diagnosis bits can be shifted out serially.
The rising edge of
CS
will reset all error registers.
Full Diagnosis
For full diagnosis there are two diagnostic bits per channel configured as shown in Figure 1.
Normal function:
The bit combination
HH
indicates that there is no fault condition, i.e. normal
function.
Overload, Short Circuit to Battery (SCB) or Overtemperature:
HL
is set when the current
limitation gets active, i.e. there is a overload, short to supply or overtemperature condition.
Open load:
An open load condition is detected when the drain voltage decreases below 3 V
(typ.).
LH
bit combination is set.
Short Circuit to GND:
If a drain to ground short circuit exists and the drain to ground current
exceeds 100 μA, short to ground is detected and the
LL
bit combination is set.
A definite distinction between open load and short to ground is guaranteed by design.
The standard way of obtaining diagnostic information is as follows:
Clock in serial information into SI pin and wait approximately 150 μs to allow the outputs to
settle. Clock in the identical serial information once again - during this process the data com-
ing out at SO contains the bit combinations representing the diagnosis conditions as described
in Figure 1.
Diagnostic Serial OUT (SO)
HH
HL
LH
LL
Normal function
Overload, Shorted Load or Overtemperature
Open Load
Shorted to Ground
Ch.4
Ch.3
Ch.2
Ch.1
7 6 5 4 3 2 1 0
Figure 1: Two bits per channel diagnostic feedback
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