BTS6144B/P View Datasheet(PDF) - Infineon Technologies
Part Name
Description
Manufacturer
BTS6144B/P Datasheet PDF : 16 Pages
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Data sheet BTS 6144B/P
Short circuit detection
Fault Condition: VON > VON(SC) (3.5 V typ.) and t> td(SC)
(typ.650 µs).
Overload detection
Fault Condition: VON > 1 V typ.
+ Vbb
VO N
Logic
unit
detection
circuit
OUT
Short circuit
Short circuit is a combination of primary and
secondary impedance’s and a resistance’s.
5uH
10mOhm
I IN
V bb
V bb
OUT
IN PROFET
IS
SC
L SC
RSC
Z
L
Inductive load switch-off energy
dissipation
E bb
E AS
V bb
V bb
i L(t)
IN PROFET OUT
IS
L
I IN
RIS
{Z L RL
ELoad
EL
ER
Energy stored in load inductance:
EL = 1/2·L·I2L
While demagnetizing load inductance, the energy
dissipated in PROFET is
EAS= Ebb + EL - ER= VON(CL)·iL(t) dt,
with an approximate solution for RL > 0 Ω:
EAS= 2IL·R· LL(Vbb + |VOUT(CL)|)
ln
(1+
IL·RL
|VOUT(CL)|
)
Maximum allowable load inductance for
a single switch off
L = f (IL ); Tj,start = 150°C, Vbb = 12 V, RL = 0 Ω
1000
L [m H]
Allowable combinations of minimum, secondary
resistance for full protection at given secondary
inductance and supply voltage for single short circuit
event:
[uH] L SC
15
Vbb :
16V 24V
18V
30V
100
10
10
1
5
0
0
RSC
100
200
300 [mOhm]
0,1
0,01
1
10 I_L [A] 100
Infineon Technologies AG
11 of 16
2003-Oct-01
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