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TD350E View Datasheet(PDF) - STMicroelectronics

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Description
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TD350E
ST-Microelectronics
STMicroelectronics ST-Microelectronics
TD350E Datasheet PDF : 17 Pages
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TD350E
Functional description
5.6
Minimum ON time
In order to ensure the proper operation of the 2-level turn-off function, the input ON time
(Twin) must be greater than the Twinmin value:
Twinmin=Ta+2*Rdel*Coff
Rdel is the internal discharge resistor and Coff is the external timing capacitor.
Input signals smaller than Ta are ignored. Input signals larger than Twinmin are transmitted to
the output stage after the Ta delay with minimum width distortion (ΔTw=Twout-Twin).
For an input signal width Twin between Ta and Twinmin, the output width Twout is reduced
below Twin (pulse distortion) and the IGBT could be partially turned on. These input signals
should be avoided during normal operation.
5.7
Output
The output stage is able to sink 2.3 A and source 1.5 A (typ) at 25 °C (1.2 A/0.75 A minimum
over the full temperature range). Separate sink and source outputs allow independent gate
charge and discharge control without an extra external diode.
5.8
Fault status output
Fault output is used to signal a fault event (desaturation, UVLO) to a controller. The fault pin
is designed to drive an optocoupler.
5.9
Undervoltage protection
Undervoltage detection protects the application in the event of a low VH supply voltage
(during startup or a fault situation). During undervoltage, the OUTH pin is open and the
OUTL pin is driven low (active pull-down for VH>2 V, passive pull-down for VH<2 V). Fault
output signals the undervoltage state and is reset only when undervoltage state disappears.
Figure 3. Undervoltage protection
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Doc ID 018539 Rev 2
9/17
 

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