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BTS7020-2EPA Scheda tecnica(PDF) 32 Page - Infineon Technologies AG

Il numero della parte BTS7020-2EPA
Spiegazioni elettronici  Smart High-Side Power Switch
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Produttore elettronici  INFINEON [Infineon Technologies AG]
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Data Sheet
32
Rev. 1.00
2017-08-24
BTS7020-2EPA
PROFETTM+2
Protection
Power supply voltage VS can increase above 18 V for short time, for instance in Load Dump or in Jump Start
condition. Whenever VS ≥ VS(JS), the overload detection current is set to IL(OVL_JS) as shown in Figure 26.
Figure 26 Overload Detection Current variation with VS voltage
When IL ≥ IL(OVL) (either IL(OVL0) or IL(OVL1)), the channel is switched OFF. The channel is allowed to restart
according to the retry strategy described in Chapter 8.3.
8.3
Protection and Diagnosis in case of Fault
Any event that triggers a protection mechanism (either Overtemperature or Overload) has 2 consequences:
• the affected channel switches OFF and the internal counter is incremented
• if the diagnosis is active for the affected channel, a current IIS(FAULT) is provided by IS pin (see Chapter 9.2.2
for further details)
The channel can be switched ON again if all the protection mechanisms fulfill the “restart” conditions
described in Table 14. Furthermore, the device has an internal retry counter (one for each channel) to
maximize the robustness in case of fault.
8.3.1
Retry Strategy
When IN is set to “high”, the channel is switched ON. In case of fault condition the output stage is switched
OFF. The channel can be allowed to restart only if the “restart” conditions for the protection mechanisms are
fulfilled (see Table 14).
Table 14
Protection “Restart” Condition
Fault condition
Switch OFF event
“Restart” Condition
Overtemperature
TJ ≥ TJ(ABS) or (TJ - TJ(REF)) ≥ TJ(DYN)
TJ < TJ(ABS) and (TJ - TJ(REF)) < TJ(DYN)
(including hysteresis)
Overload
IL ≥ IL(OVL)
IL < 50 mA
TJ within TJ(ABS) and TJ(DYN) ranges
(including hysteresis)
Protection_JS.emf
IL(OVL)
VS
VS(JS)
IL(OVL_JS)


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