Datasheet

Data Sheet 10 Rev.1.0, 2008-04-29
BTS4175SGA
Power Stage
5 Power Stage
The power stage is built by 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 4
shows the dependencies for the typical ON-state resistance. The behavior in reverse polarity is described in
Chapter 6.4.
Figure 4 Typical ON-state resistance
A high signal (See Chapter 8) at the input pin 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
Figure 5 shows the typical timing when switching a resistive load.
Figure 5 Turn ON/OFF (resistive) timing
0
100
200
300
400
500
600
700
800
900
1000
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
Battery voltage (V)
Rdson (m
Ω
)
Rdson.vsd
0
50
100
150
200
250
300
350
400
-40
-
2
0
0
20
40
6
0
8
0
100
120
140
Junction temperature (°C)
Rdson (m
Ω
)
IN
t
V
OUT
t
ON
t
OFF
90% V
S
10% V
S
V
IN_H_min
V
IN_L_max
t
Switching times.vsd
30% V
S
70% V
S
dV/dt
ON
dV/dt
OFF