L9348(2013) Ver la hoja de datos (PDF) - STMicroelectronics
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L9348 Datasheet PDF : 13 Pages
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L9348
Table 6.
Open load
(under current detection)
Overtemperature
Power-GND-loss
Signal-GND-loss
Output voltage clamp active
(Q3/4 only)
ON State
ENA = HIGH,
IN = HIGH
X
X
X
X
OFF State
ENA = HIGH,
IN = LOW
typ. Filter
time
Reset done by
18s internal timer (1.5ms typ.)
18s
ENA or INx = “LOW”
for t 1.5ms (typ.)
X
18s ENA or INx = “LOW”
for t 1.5ms (typ.)
X
18s ENA or INx = “LOW”
for t 1.5ms (typ.)
X
-
internal timer (1.5ms typ.)
1.7 Diagnostic Output at Pulse Width Operation (PWM)
If an input is operated with a pulsed signal (f tD = 667 Hz typ.), the status does not follow each single pulse.
An internal delay tD of typ. 1.5ms leads to a continuous status output signal (see Figure 4 in chapter 2.0 Timing
Diagrams).
1.8 Diagnostic Table
In general the diagnostic follows the input signal in normal operating conditions. If any error is detected the di-
agnostic is inverted.
Table 7.
Operating Condition
Normal function
Open load or short to ground
Overload or short to supply
Latched overload
Reset latch
Overtemperature
Latched overtemperature
Reset latch
Enable
Input
ENA
L
L
H
H
L
L
H
H
H
H
H –> L
H
H
H
H –> L
H
Control
Input
IN
L
H/PWM
L
H/PWM
L
H/PWM
L
H/PWM
H/PWM
H/PWM
X
H/PWM –> L
H/PWM
H/PWM
X
H/PWM –> L
Power
Output
Q
OFF
OFF
OFF
ON
OFF
OFF
OFF
ON
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
Status
Output
ST
L
L
L
H
X
X
H
L
L
L
L
L
L
L
L
L
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