Smart Low Side Power Switch
HITFET BSP 78
Features
·
Logic Level Input
·
Input Protection (ESD)
·
Thermal shutdown with
auto restart
•
Green product (RoHS compliant)
·
Overload protection
·
Short circuit protection
·
Overvoltage protection
·
Current limitation
·
Analog driving possible
Product Summary
Drain source voltage
On-state resistance
Nominal load current
Clamping energy
V
DS
R
DS(on)
I
D(Nom)
E
AS
4
42
50
3
500
V
mW
A
mJ
3
2
1
VPS05163
Application
·
All kinds of resistive, inductive and capacitive loads in switching
or linear applications
·
µC compatible power switch for 12 V DC applications
·
Replaces electromechanical relays and discrete circuits
General Description
N channel vertical power FET in Smart SIPMOS
Ò
technology. Fully protected by embedded
protection functions.
V
bb
M
HITFET
â
Current
Limitation
In
Pin 1
Drain
Pin 2 and 4 (TAB)
Overvoltage-
Protection
Gate-Driving
Unit
ESD
Overload
Protection
Over-
temperature
Protection
Short circuit
Protection
Pin 3
Source
Complete product spectrum and additional information http://www.infineon.com/hitfet
Datasheet
1
Rev. 1.3, 2008-04-14
Smart Low Side Power Switch
HITFET BSP 78
Maximum Ratings at T
j
= 25°C, unless otherwise specified
Parameter
Symbol
Drain source voltage
Supply voltage for full short circuit protection
Continuous input voltage
1)
Continuous input current
2)
-0.2V
£
V
IN
£
10V
V
IN
< -0.2V or
V
IN
> 10V
Operating temperature
Storage temperature
Power dissipation
5)
T
C
= 85 °C
Unclamped single pulse inductive energy
2)
Load dump protection
V
LoadDump2)3)
=
V
A
+
V
S
V
IN
= 0 and 10 V, t
d
= 400 ms,
R
I
= 2
W,
R
L
= 4.5
W,
V
A
= 13.5 V
Electrostatic discharge
voltage
2)
(Human Body Model)
V
ESD
according to
Jedec norm
EIA/JESD22-A114-B, Section 4
E
AS
V
LD
T
j
T
stg
P
tot
V
DS
V
bb(SC)
V
IN
I
IN
Value
42
42
-0.2
2)
... +10
Unit
V
mA
self limited
|
I
IN
|
£
2
-40 ...+150
-55 ... +150
3.8
500
53.5
W
mJ
V
°C
2
kV
Thermal resistance
junction - ambient:
@ min. footprint
@ 6 cm
2
cooling area
4)
junction-soldering point:
1For input voltages beyond these limits I has to be limited.
IN
2not subject to production test, specified by design
3
V
Loaddump is setup without the DUT connected to the generator per ISO 7637-1 and DIN 40839
4 Device on 50mm*50mm*1.5mm epoxy PCB FR4 with 6cm2 (one layer, 70µm thick) copper area for drain
connection. PCB mounted vertical without blown air.
5not subject to production test, calculated by R
thJA and Rds(on)
R
thJA
125
72
R
thJS
17
K/W
K/W
Datasheet
2
Rev. 1.3, 2008-04-14
Smart Low Side Power Switch
HITFET BSP 78
Electrical Characteristics
Parameter
at
T
j
= 25°C, unless otherwise specified
Characteristics
Drain source clamp voltage
T
j
= - 40 ...+ 150,
I
D
= 10 mA
Off-state drain current
T
j
= -40...+85 °C,
V
DS
= 32 V ,
V
IN
= 0 V
T
j
= 150 °C
Input threshold voltage
I
D
=
1.4
mA,
T
j
= 25 °C
I
D
=
1.4
mA,
T
j
= 150 °C
On state input current
On-state resistance
V
IN
= 5 V,
I
D
= 3 A,
T
j
= 25 °C
V
IN
= 5 V,
I
D
= 3 A,
T
j
= 150 °C
On-state resistance
V
IN
= 10 V,
I
D
= 3 A,
T
j
= 25 °C
V
IN
= 10 V,
I
D
= 3 A,
T
j
= 150 °C
Nominal load current
5)
V
DS
= 0.5 V,
T
j
< 150°C,
V
IN
= 10 V,
T
A
= 85 °C
Current limit (active if
V
DS
>2.5 V)
1)
V
IN
= 10 V,
V
DS
= 12 V,
t
m
= 200 µs
1Device switched on into existing short circuit (see diagram Determination of I
D(lim) ). If the device is in on condit
and a short circuit occurs, these values might be exceeded for max. 50 µs.
5not subject to production test, calculated by R
thJA and Rds(on)
Symbol
min.
V
DS(AZ)
I
DSS
-
-
V
IN(th)
1.3
0.8
I
IN(on)
R
DS(on)
-
-
R
DS(on)
-
-
I
D(Nom)
I
D(lim)
3
18
-
42
Values
typ.
-
max.
55
Unit
V
µA
1.5
5
1.7
-
10
45
75
35
65
4
24
8
15
V
2.2
-
30
60
100
50
90
-
30
A
µA
mW
Datasheet
3
Rev. 1.3, 2008-04-14
Smart Low Side Power Switch
HITFET BSP 78
Electrical Characteristics
Parameter
at
T
j
= 25°C, unless otherwise specified
Dynamic Characteristics
V
IN
to 90%
I
D
:
R
L
= 4.7
W,
V
IN
= 0 to 10 V,
V
bb
= 12 V
Turn-off time
V
IN
to 10%
I
D
:
Turn-on time
R
L
= 4.7
W,
V
IN
= 10 to 0 V,
V
bb
= 12 V
Slew rate on
70 to 50%
V
bb
:
R
L
= 4.7
W,
V
IN
= 0 to 10 V,
V
bb
= 12 V
Slew rate off
50 to 70%
V
bb
:
R
L
= 4.7
W,
V
IN
= 10 to 0 V,
V
bb
= 12 V
Protection Functions
1)
Thermal overload trip temperature
Thermal hysteresis
2)
Input current protection mode
T
j
= 150 °C
Unclamped single pulse inductive energy
2)
I
D
= 3 A,
T
j
= 25 °C,
V
bb
= 12 V
E
AS
500
-
-
mJ
T
jt
DT
jt
I
IN(Prot)
150
-
-
175
10
130
-
-
300
°C
K
µA
t
on
t
off
-dV
DS
/dt
on
dV
DS
/dt
off
-
-
-
-
60
60
0.3
0.7
100
100
1.5
1.5
V/µs
µs
Symbol
min.
Values
typ.
max.
Unit
Inverse Diode
Inverse diode forward voltage
I
F
= 15 A,
t
m
= 250 µs,
V
IN
= 0 V,
t
P
= 300 µs
1Integrated protection functions are designed to prevent IC destruction under fault conditions
described in the data sheet. Fault conditions are considered as "outside" normal operating range.
Protection functions are not designed for continuous repetitive operation.
2not subject to production test, specified by design
V
SD
-
1
1.5
V
Datasheet
4
Rev. 1.3, 2008-04-14
Smart Low Side Power Switch
HITFET BSP 78
Block diagram
Terms
Inductive and overvoltage
output clamp
RL
V
I IN
1
IN
HITFET
S
VIN
3
2
D
ID
VDS
Vbb
Z
D
S
HITFET
Input circuit (ESD protection)
Short circuit behaviour
Gate Drive
Input
V
IN
Source/
Ground
I
IN
I
D
S
T
j
Datasheet
5
Rev. 1.3, 2008-04-14
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