BTS5234L Datasheet, PDF (11/28 Pages) Infineon Technologies AG – Smart High-Side Power Switch PROFET TWO CHANNELS, 60MOHM

Smart High-Side Power Switch
BTS 5234L
Block Description and Electrical Characteristics
A high signal at the input pin causes the power DMOS to switch on with a dedicated
slope, which is optimized in terms of EMC emission.
IN
V_OUT
90%
70%
30%
10%
t_ON
dV /dt_ON
Figure 6 Switching a Load (resistive)
t_OFF
t
70%
dV /dt_OFF
30%
t
SwitchOn.emf
4.1.3 Inductive Output Clamp
When switching off inductive loads with high-side switches, the voltage V_OUT drops
below ground potential, because the inductance intends to continue driving the current.
V_bb
VBB
GND
I_L
OUT
V
OUT
L,
R_L
Figure 7 Output Clamp (OUT1 and OUT2)
OutputClamp.emf
To prevent destruction of the device, there is a voltage clamp mechanism implemented
that keeps that negative output voltage at a certain level (V_OUT(CL)). See Figure 7 and
Figure 8 for details. Nevertheless, the maximum allowed load inductance is limited.
Data Sheet
11
V1.0, 2004-01-23