The VND600SP is a monolithic device made
using STMicroelectronics VIPower technology. It
is intended for driving resistive or inductive loads
with one side connectedtoground.ActiveV
voltage clamp protects the device against low
energyspikes(seeISO7637transient
BLOCK DIAGRAM
I
lim
V
CC
10
1
PowerSO-10
CC
compatibility table). This device has two channels
in high side configuration; each channel has an
analog sense output on which the sensing current
is proportional (according to a known ratio) to the
corresponding load current. Built-in thermal shutdown and outputs current limitation protect the
chip from over temperature and short circuit.
Device turns off in caseof ground pin
CAll functions of the device are performed as designed after exposure to disturbance.
E
One or more functions of the device is not performed as designed after exposure to disturbance
and cannot be returned to proper operation without replacing the device.
SWITCHING CHARACTERISTICS
TEST LEVELS
Impedance
V
OUT
dV
OUT
INPUT
/dt
(on)
t
d(on)
70%
t
90%
dV
/dt
OUT
(off)
r
10%
t
d(off)
t
f
t
t
5/10
Page 6
VND600SP
Figure1: Waveforms
INPUT
n
LOAD CURRENT
SENSE
n
V
CC
INPUT
n
LOAD CURRENT
SENSE
n
V
CC
INPUT
n
LOAD CURRENT
SENSE
n
NORMAL OPERATION
n
UNDERVOLTAGE
V
USDhyst
V
USD
n
OVERVOLTAGE
V
OV
VCC<V
OV
n
VCC>V
OV
INPUT
n
LOAD CURRENT
LOAD VOLTAGE
SENSE
n
INPUT
n
LOAD VOLTAGE
LOAD CURRENT
SENSE
n
T
j
INPUT
n
LOAD CURRENT
SENSE
n
SHORT TO GROUND
n
n
SHORT TO V
n
n
<Nominal
T
TSD
T
R
n
OVERTEMPERATURE
CC
<Nominal
I
SENSE
=
V
SENSEH
R
SENSE
6/10
Page 7
APPLICATION SCHEMATIC
+5V
R
prot
R
µC
prot
R
prot
INPUT1
CURRENTSENSE1
INPUT2
VND600SP
V
CC
D
ld
OUTPUT1
R
SENSE1
R
prot
CURRENTSENSE2
R
SENSE2
GNDPROTECTIONNETWORKAGAINST
REVERSE BATTERY
Solution 1: Resistor in the ground line (R
can be used withany type of load.
The following is an indication on how to dimension the
resistor.
R
GND
1) R
2) R
where -I
be found in the absolute max imum r ating s ection of the
≤ 600mV / I
GND
≥ (−VCC) / (-I
GND
is the DC reverse groundpin current and can
GND
S(on)max
)
GND
.
device’s datasheet.
Power Dissipation in R
battery situations) is:
= (-VCC)2/R
P
D
GND
(when VCC<0: during reverse
GND
This r esistor can be shared amongst several different
HSD. Please note that the value of this resistor should be
calculated with formula (1) wher e I
sum of the maximum on-state c urrents of t he different
S(on)max
devices.
Please note that if the m icroprocessor ground i s not
common with the device ground then the R
*R
produce a shift (I
and the status output values. This shift will vary
S(on)max
) in the input thresholds
GND
depending o n how many devices are ON in the case o f
several high side drivers sharing the same R
only). This
GND
becomes the
GND
.
GND
will
GND
R
V
GND
GND
D
OUTPUT2
GND
If thecalculated power dissipation leadsto a large resistor
or several devices have to share the same resistor then
the ST sug gests to utilize Solution 2 (see below).
Solution 2: A diode (D
A resistor ( R
if the device will be drivingan inductive load.
D
GND
=1kΩ) s hould be inserted in para llel to
GND
) in the ground line.
GND
This small signal di ode can be safely shared amongst
several different HSDs. Also in this case, the presence of
the grou nd network will pro duce a shift ( j 600mV) in the
input thresholds and t he s tatus output values if the
microprocessor ground is not common with the de vice
ground. This shift will not vary if more than o ne HSD
shares the same diode/resistor network.
LOAD DUMP PROT ECTION
Dldis necessary (Transil or MOV) if the load dump peak
voltage exceeds V
the devicewill be subject totransients on the V
are greater th an the ones sho wn in the ISO T/R 7637/1
table.
max DC rating. The same applies if
CC
µC I/Os PROTECTION:
If a ground protection netwo rk is used and ne gative
transient are present on the V
be pulled negative. ST suggests toinsert a resistor (R
in line to prevent the µC I/Os pins to latch-up.
The value of these resistors is acompromise between the
leakage current of µC and the current required by the
Information furnished is believed to be accurate and reliable. However,STMicroelectronics assumes no responsibility for the consequences
of use of such information nor for any infringement of patents or other rights of third parties which may results from its use. No license is
granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are
subject tochange without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products
are not authorized for use as critical components in life support devices or systems without express written approvalof STMicroelectronics.
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The ST logo is a registered trademarkof STMicroelectronics
1999 STMicroelectronics - Printed in ITALY- All Rights Reserved.
STMicroelectronics GROUPOF COMPANIES
http://www.st.com
10/10
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