The VND10BSP is a monolithic device made
using SGS-THOMSON Vertical Intelligent Power
Technology, intended for driving resistive or
inductive loads with one side grounded. This
device has two channels, and a common
diagnostic. Built-in thermal shut-down protects
the chip fromover temperatureand shortcircuit.
The statusoutput provides an indicationof open
load in onstate, open load in off state,
overtemperatureconditions and stuck-on to V
CC
.
10
1
PowerSO-10
BLOCK DIAGRAM
March 1998
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Page 2
VND10BSP
ABSOLUTEMAXIMUMRATING
Symb o lPara met erVal u eUni t
V
(BR)DSS
I
OUT
I
(RMS ) RMS Output Curr ent at Tc=85oC and f > 1Hz14A
OUT
I
I
-V
I
STAT
V
ESD
P
T
T
CONNECTION DIAGRAMS
Drain-S o ur ce Br eakdown V olt age40V
Out put Current (c on t . ) a t Tc=85oC14A
Revers e Out put Cu rr ent a t Tc=85oC-14A
R
Input Current±10mA
IN
Reverse Su pply Voltage-4V
CC
St at us Current±10mA
Elect r o st at ic Disc harge (1.5 kΩ, 100 pF)2000V
Power Dissipation at Tc=25oC75W
tot
Junction O per at in g Temperat ure-40 to 150
j
St orage Tem per at ure-55 to 150
stg
o
C
o
C
CURRENT AND VOLTAGE CONVENTIONS
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VND10BSP
THERMALDATA
R
thj-case
R
thj-amb
($) When mounted using minimum recommended pad size on FR-4 board
(*) In= Nominal current according to ISO definition for high side automotive switch (see note 1)
NOTE = (^) See switching time waveform
NOTE = (•) The V
calculated to not exceed 10 mA at the input pin.
NOTE = note 1: The Nominal Current is the current at T
NOTE = note 2: I
note 3:t
St at us Voltage Output
I
=1.6mA0.4V
STAT
Low
Under Voltage Shut
3.54.56V
Down
St at us Clamp Volt ageI
Ther mal Shut-down
STAT
I
STAT
=10mA
=-10mA
56
-0.7
140160180
Tem perature
Ther mal Shut-down
Hyst eresis
Reset Temperature125
R
Open Voltage LevelOff-State (note 2)2.545V
OL
Open Load Curr ent
OL
On-State0.60.91.4A
Level
St at us Delay(note 3)510µ s
St at us Delay(note 3)505002500µs
is internally clamped at 6V about. It is possible toconnect thispin toan higher voltage via an external resistor
IH
=85oC for battery voltage of 13Vwhich produces a voltage drop of 0.5 V
c
: ISO definition.
povltpol
=(VCC-VOL)/R
OL(off)
OL
7V
50
V
o
C
o
C
o
C
Note2 RelevantFigureNote 3 Relevant Figure
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SwitchingTime Waveforms
VND10BSP
FUNCTIONAL DESCRIPTION
The device has a diagnostic output which
indicates open load in on-state, open load in
off-state,overtemperatureconditions and
stuck-on to V
CC
.
From the falling edge of the input signal, the
status output, initially lowto signal a fault
condition(overtemperatureoropenload
on-state), will go back to a high state with a
different delay in case of overtemperature (tpovl)
and in case of open open load (tpol)respectively.
This feature allows to discriminate the nature of
the detected fault. To protect the device against
short circuit and over current condition, the
thermal protection turns the integrated Power
MOS off at a minimum junction temperature of
140oC. When this temperature returns to 125oC
the switch is automatically turned on again. In
short circuit the protection reacts with virtually no
delay, the sensor being located inside the Power
MOS area. An internal function of the devices
ensures the fast demagnetization of inductive
loads with a typicalvoltage (V
) of-18V. This
demag
function allows to greatly reduces the power
dissipationaccordingto the formula:
P
dem
= 0.5• L
load
•(Ι
load
)2• [(VCC+V
demag
)/V
demag
• f
where f =switching frequencyand
V
=demagnetizationvoltage.
demag
The maximum inductance which causes the chip
temperature to reach the shut-down temperature
in a specifiedthermal environment is a function of
the load current for a fixed V
CC
,V
according to the above formula. In this device if
the GND pin is disconnected, with V
exceeding16V, it willswitch off.
PROTECTINGTHEDEVICEAGAINST
REVERSE BATTERY
The simplest way to protect the device against a
continuous reverse battery voltage (-26V) is to
insert a Schottky diode between pin 1 (GND) and
ground, as shown in the typical application circuit
(fig.3).
The consequences of the voltage drop across
this diode areas follows:
If the input is pulled to power GND, a negative
voltage of -V
is seen by the device. (Vil, Vih
f
thresholds and Vstat are increased by Vf with
respectto power GND).
Theundervoltageshutdown level is increa-sed
byVf.
If there is no need for the control unit to handle
external analog signals referred to the power
GND, the best approach is to connect the
]
referencepotential of the controlunit to node [1]
(see application circuit in fig. 3), which becomes
the common signal GND for the whole control
board avoiding shift of V
,Viland V
ih
solutionallows the use of a standarddiode.
demag
stat
and f
CC
. This
not
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Page 6
VND10BSP
TRUTH TABLE
INPUT 1INPU T 2OUT PUT 1 O UT PUT 2 DIAGNOS TI C
Normal Opera ti onL
H
L
H
Under-voltageXXLLH
Thermal Shutdown
Open Load
Out put Shorted t o V
(**) with additional external resistor.
CC
Channel1
Channel2
Channel1
Channel2
Channel1
Channel2
HXLXL
XHXLL
H
L
X
L
H
L
X
L
Figure1: Waveforms
L
H
H
L
X
L
H
L
X
L
H
L
L
H
L
H
H
L
X
L
H
H
X
L
L
H
H
L
X
L
H
L
X
L
H
H
H
H
H
H
L
L(**)
L
L(**)
L
L
L
L
6/9
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Figure2: Typical ApplicationCircuit With ASchottkyDiode For Reverse SupplyProtection
Figure3: Typical ApplicationCircuit With Separate Signal Ground
Information furnished isbelieved to be accurate and reliable. However, SGS-THOMSON Microelectronics assumes no responsability for the
consequences of use ofsuch information nor for anyinfringement of patents or other rights of third parties which may resultsfrom itsuse. No
license is granted by implication or otherwiseunder any patent orpatent rights of SGS-THOMSON Microelectronics. Specifications mentioned
in this publication are subjectto changewithout notice.This publicationsupersedes and replaces all information previously supplied.
SGS-THOMSON Microelectronicsproducts are notauthorized foruse as criticalcomponents in lifesupport devices orsystems without express
written approval of SGS-THOMSON Microelectonics.