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BTF50060-1TEA_11 Datasheet, PDF (16/38 Pages) Infineon Technologies AG – Smart High-Side Power Switch, One Channel
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BTF50060-1TEA
Functional Description
5.3
Protection Functions
The BTF50060-1TEA provides embedded protective functions. Integrated protection functions are designed to
prevent the destruction of the IC from fault conditions described in the data sheet. Fault conditions are considered
as “outside” normal operating range. Protection functions are designed for neither continuous nor repetitive
operation.
In case of overload, high inrush currents, or short circuit to ground, the BTF50060-1TEA offers several protection
mechanisms. Figure 15 describes the functionality of the diagnosis and protection block.
Diagnosis & Protection
Undervoltage protection
delay = td(UV)
no delay
Vs
VS(UV)
Input
circuit
Sense
output
IN
timer reset
no delay
delay = tRESET
0
1 IIS(fault)
≥1
No Undervoltage
&
No FAULT
INTELLIGENT LATCH
Q S ≥1
Tjt
QR
Gate
driver
Temp
1
IL(SC)
ENABLE
VOUT(OL)
A
OUT
ROUT(GND)
Open Load at OFF
Figure 15 Diagram of Diagnosis & Protection block
DiagnosisProtection. emf
5.3.1 Protection by Over Current Shutdown
The internal logic permanently monitors the load current IL. In the event of a load current exceeding the short circuit
shutdown threshold (IL>IL(SC)), the output will switch OFF with a latching behavior. During an over current
shutdown, an overshooting IL(SC)peak may occur, depending on the short circuit impedances. For the case the
device is in ON state while short circuit appears, the typical overshooting IL(SC)peak as a function of the steepness
of the short circuit current dISC/dt, see Chapter 6.2.3.
For a detailed description of the latching behavior, please see Chapter 5.3.3.
At lower supply voltages the current tripping level IL(SC) will decrease depending on the supply voltage. At VS =
4.7V, the current tripping level will be reduced to IL(SC)LV. Please refer to Figure 35 for typical current tripping level
IL(SC) as a function of the supply voltage VS.
Datasheet
Speed PROFETTM
16
Rev. 1.2, 2011-09-01
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