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BTS7020-2EPA Datenblatt(PDF) 33 Page - Infineon Technologies AG

Teilenummer BTS7020-2EPA
Bauteilbeschribung  Smart High-Side Power Switch
Download  58 Pages
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Hersteller  INFINEON [Infineon Technologies AG]
Direct Link  http://www.infineon.com
Logo INFINEON - Infineon Technologies AG

BTS7020-2EPA Datenblatt(HTML) 33 Page - Infineon Technologies AG

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Data Sheet
33
Rev. 1.00
2017-08-24
BTS7020-2EPA
PROFETTM+2
Protection
The channel is allowed to switch ON for nRETRY(CR) times before switching OFF. After a time tRETRY, if the input pin
is set to “high”, the channel switches ON again for nRETRY(NT) times before switching OFF again (“retry” cycle).
After nRETRY(CYC) consecutive “retry” cycles, the channel latches OFF. It is necessary to set the input pin to “low”
for a time longer than tDELAY(CR) to de-latch the channel (“counter reset delay” time) and to reset the internal
counter to the default value.
During the “counter reset delay” time, if the input is set to “high” the channel remains switched OFF and the
timer counting tDELAY(CR) is reset, starting to count again as soon as the input pin is set to “low” again. If the
input pin remains “low” for a time longer than tDELAY(CR) the internal retry counter is reset to the default value,
allowing nRETRY(CR) retries at the next channel activation.
The retry strategy is shown in Figure 29 (flowchart), Figure 27 (timing diagram - input pin always “high”) and
Figure 28 (timing diagram - channel controlled in PWM).
Figure 27 Retry Strategy Timing Diagram
Figure 28 Retry Strategy Timing Diagram - Channel operated in PWM
t
IN
tRETRY
Short circu it
to ground
IL
0
1
nRETRY(CR)
Internal
counter
nRETRY(CR) + nRETRY(NT)
nRETRY(CR) + (nRETRY(CYC) * nRETRY(NT))
tDELAY(CR)
tRETRY
0
nRETRY(CR)
nRETRY(NT)
"retry" cycle
nRETRY(NT)
t
t
t
Protection_PROFET_time_noPWM.emf
nRETRY(CYC)
t
DEN
t
IIS
IIS(FAULT)
IL / kILIS
IL / kILIS
t
IN
tRETRY
Short circu it
to ground
IL
0
1
nRETRY(CR)
In ternal
counter
nRETRY(CR) + nRETRY(NT)
nRETRY(CR) + (nRETRY(CYC) * nRETRY(NT))
tDELAY(CR)
tRETRY
0
nRETRY(CR)
nRETRY(NT)
"retry" cycle
nRETRY(NT)
t
t
t
Protection_PROFET_Timings.emf
nRETRY(CYC)


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