Datasheet

Data Sheet 15 Rev. 2.1, 2011-09-01
PROFET™+ 12V
BTS5045-2EKA
Power Stage
5 Power Stage
The power stages are built using an N-channel vertical power MOSFET (DMOS) with charge pump.
5.1 Output ON-state Resistance
The ON-state resistance R
DS(ON)
depends on the supply voltage as well as the junction temperature T
J
. Figure 8
shows the dependencies in terms of temperature and supply voltage for the typical ON-state resistance. The
behavior in reverse polarity is described in Chapter 6.4.
Figure 8 Typical ON-state Resistance
A high signal at the input pin (see Chapter 8) causes the power DMOS to switch ON with a dedicated slope, which
is optimized in terms of EMC emission.
5.2 Turn ON/OFF Characteristics with Resistive Load
Figure 9 shows the typical timing when switching a resistive load.
Figure 9 Switching a Resistive Load Timing
15
25
35
45
55
65
75
85
-40 -10 20 50 80 110 140
Junction Temperature (Tj)
R
DS(ON)
(m
Ω
)
0
10
20
30
40
50
60
70
80
90
100
0 3 6 9 12 15 18
Supply Voltage V
S
(V)
R
DS(ON)
(m
Ω
)
Rdson_45.vsd
IN
t
V
OUT
t
ON
t
ON_DELAY
t
OFF
90% V
S
10% V
S
V
IN_H
V
IN_L
t
Switching times.vsd
t
OFF_DELAY
30% V
S
70% V
S
dV/dt
ON
dV/dt
OFF