L9349-LF
Quad intelligent power low side switch
■
Four low-side output driver with protection
diagnostics designed as a conventional switch
– 2 channels with 5 A output current
capability and rON = 0.2 typ.
– 2 channels with 3 A output current
capability and rON = 0.3 typ.
■
Integrated 60 V Zener diodes output clamping
structure
■
Output slope control
■
Short circuit protection
■
Open load detection in ON and OFF condition
■
Load bypass detection
■
Overload disable
■
Signal and power ground loss shutdown
■
Selective overtemperature shutdown
■
Electrostatic discharge (ESD) protection
PowerSO-20
The device is equipped with an integrated Zener
diodes clamp for fast inductive load current
recirculation. This structure limits the output
voltage during the recirculation phase to 50V.
The device is self-protected against short circuit
at the outputs and overtemperature.
For the real time error diagnosis, the voltage and
the current of the outputs are compared with
internally fixed thresholds to recognize open load
in OFF and ON conditions.
Description
The L9349 is a monolithic IC designed to drive
inductive loads in low side configurations like
hydraulic valves used in ABS systems.
The output voltages are also compared with each
other in OFF condition with a fixed offset, in order
to recognize load bypasses.
Particular care has been taken to protect the
device against failures, to avoid electromagnetic
interferences and to offer extensive real time
diagnostics.
If the over load current threshold is exceeded, the
output current will be limited internally during the
diagnostic overload delay switch-off time.
The internal pull down current source at the
ENable and INput pins assures, that the device is
switched off, in case of open input conditions.
All four channels are monitored with a status
output. The diagnostic output level in connection
with different enable and input conditions allows it
to recognize the different fail states.
An output voltage slope limitation is implemented
to reduce the EMI.
Table 1.
Device summary
Order code
Package(1)
Packing
L9349-LF
PowerSO-20
Tray
L9349TR-LF
PowerSO-20
Tape and reel
1. ECOPACK® package (see Section 4: Package information)
September 2013
Rev 6
1/17
www.st.com
1
Contents
L9349-LF
Contents
1
Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2
Pins description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3
Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.1
Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.2
Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.3
Electrical characteristics (operating range) . . . . . . . . . . . . . . . . . . . . . . . . 8
3.4
Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.5
Diagnostic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.6
Circuit description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4
Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
5
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
2/17
L9349-LF
List of tables
List of tables
Table 1.
Table 2.
Table 3.
Table 4.
Table 5.
Table 6.
Table 7.
Table 8.
Table 9.
Device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Pins description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Thermal data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Electrical characteristics (operating range). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Diagnostic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Corresponding filter time for each detected signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
3/17
List of figures
L9349-LF
List of figures
Figure 1.
Figure 2.
Figure 3.
Figure 4.
Figure 5.
Figure 6.
Figure 7.
Figure 8.
Figure 9.
4/17
Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Pins connection (top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
tEO clamping time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Output slope (resistive load for testing) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Timing (tDOL, tDIOU). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Block diagram - Open load voltage detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Logic diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Application circuit diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
PowerSO-20 mechanical data and package dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . 15
L9349-LF
1
Block diagram
Block diagram
Figure 1.
Block diagram
IN1
D1
Channel 1
OUT1
VS
EN
52V
Output Control
OUT4
IN4
Overtemp
R
Q
S
Delay
Time
R IO
Overload
D4
Diagnostic
Control
Openload
Channel 4
IN2
D2
Channel 2
OUT2
IN3
D3
Channel 3
OUT3
00AT0025
GND
5/17
Pins description
2
L9349-LF
Pins description
Figure 2.
Pins connection (top view)
Heat sink connected
to pins 1, 10, 11, 20
PGND
OUT1
D1
IN4
VS
NC
IN3
D2
OUT2
PGND
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
PGND
OUT4
D4
IN1
EN
GND
IN2
D3
OUT3
PGND
00AT0026
Table 2.
6/17
Pins description
N°
Pin
Function
1
PGND
Power Ground
2
Out1
Output 1 (5A)
3
D1
Diagnostic 1
4
IN4
Input 4
5
VS
Supply Voltage
6
NC
Not Connected
7
IN3
Input 3
8
D2
Diagnostic 2
9
Out2
Output 2 (5A)
10
PGND
Power Ground
11
PGND
Power Ground
12
Out3
Output 3 (3A)
13
D3
Diagnostic 3
14
IN2
Input 2
15
GND
16
EN
Common Enable
17
IN1
Input 1
18
D4
Diagnostic 4
19
Out4
Output 4 (3A)
20
PGND
Power Ground
Signal Ground
L9349-LF
Electrical specifications
3
Electrical specifications
3.1
Absolute maximum ratings
Table 3.
Absolute maximum ratings
Symbol
Parameter
Conditions
Value
Unit
VS
DC supply voltage
-0.3 to 32
V
VSP
Supply voltage pulse
(duration 5 (Min.)
internal limited (Max.)
A
IO3, 4
DC output current out 3, 4
>3 (Min.)
internal limited (Max.)
A
IOR1, 2
Reverse output current
-5
A
IOR3, 4
Reverse output current
-3
A
50
mJ
30
mJ
±0.3
V
175
°C
190
°C
EO1, 2
tEO =
250s,(1)
Switch-off energy for inductive
loads
T = 5ms
VGND
GND potential difference
Tj = -40 to 150°C
TjEO
Junction temperature during switch- t 30 min
off
t 15 min
EO3, 4
Tj
Junction temperature
-40 to TjDIS
°C
Tstg
Storage temperature
-55 to 150
°C
TjDIS
Thermal disable junction
temperature threshold
180 to 210
°C
ESD
Electrostatical discharging
MIL883C
+-2
kV
ESD
OUT1 - 4
vs. Common-GND
(PGNDs + GND)
+-4
kV
Value
Unit
3
°C/W
1. tEO is the clamping time (see Figure 3)
3.2
Thermal data
Table 4.
Symbol
Thermal data
Parameter
RTh j-case Thermal resistance junction to case
7/17
Electrical specifications
3.3
L9349-LF
Electrical characteristics (operating range)
The electrical characteristics are valid within the below defined operating range, unless
otherwise specified.
Table 5.
Electrical characteristics (operating range)
Symbol
VS
Tj1
Parameter
Test Condition
Board supply voltage
Junction temperature
Tj2
t
15min (1) over life time
Min.
Typ.
Max.
Unit
4.5
12
32
V
-40
150
°C
150
TjDIS
°C
1. Parameters guaranteed by correlation
3.4
Electrical characteristics
Table 6.
Electrical characteristics
(VS = 4.5 to 32V; -40°C Tj1 150°C < Tj2 TjDIS, unless otherwise specified.)
Values Tj1
Symbol
Parameter
Values Tj2
Test conditions
Unit
Min.
Typ.
Max.
10
Min.
Max.
Supply
IVS OFF
DC supply current Off EN = 1.0V
5
IVS ON
DC supply current On VS 14V; VIN, VEN = 2V
8
mA
mA
Diagnostic outputs D1 - D4
VDL
Diagnostic output low
voltage
ID 3mA
0.65
1.0
1.5
V
IDLE
Diagnostic output
leakage current
VD = 14V (1)
0.1
2
20
A
Tj = 25°C
Tj = 150°C
VS > 9.5V IO1,2 = 2A
200
300
500
m
Tj = 25°C
Tj = 150°C
VS > 9.5V
IO3,4 = 1.3A
300
450
750
m
V
Outputs Out 1 - Out 4
RDSON 1, 2
Output On resistance
RDSON 3, 4
VZ
Z-diode clamping
voltage
IOCL 200mA
45
60
RO
Output pull down
resistor
VS > 9.5V
EN = 0V
10
40
Open load voltage
threshold
VIN = 1V
VOUV 1-4
8/17
0.525 x
VS
0.55 x
VS
0.575 x
VS
50
k
V
L9349-LF
Table 6.
Electrical specifications
Electrical characteristics (continued)
(VS = 4.5 to 32V; -40°C Tj1 150°C < Tj2 TjDIS, unless otherwise specified.)
Values Tj1
Symbol
Parameter
Unit
Min.
2-3, 4-1, 3-2
Open load difference
voltage threshold
Typ.
Max.
0.003 x
VS
VOUV hys 1-4 Hysteresis
VOUV 1-4,
Values Tj2
Test conditions
VIN1,4/2,3 = 1V VS
16V
VOc 4.5V
VOC = output voltage of
other channel
VOC 1.0V
VOC 1.25V
Min.
Max.
V
VOC 1.5V
V
VOUV hys 14, 2-3,
Open load hysteresis
40
mV
4-1, 3-2
IOUC 1, 2, 3, 4
IOOC 1, 2
IOOC 3, 4
Open load current
threshold
VEN=VIN=2V;
VS=6.5 - 16V
Over load current
threshold
VS > 6.5V;
VOUT = 32V
TSD
Thermal shut down
TSD-hys
Thermal shut down
hysteresis
IOUT-LE
OUT leakage current
160
320
480
5
10
A
3
6
A
180
195
210
20
VOUT = 20V
VS = 0V
mA
°C
°C
5
A
-0.3
1
V
2.0
6
V
Inputs IN1-4, EN
VIN,EN L
Logic input/enable low
voltage
VIN,EN H
Logic input/enable
high voltage
VEN,IN hys
IN, EN
Logic input hysteresis
IIN
Input sink current
IEN
Enable sink current
2V < VIN, VEN < 6V
VIN, VEN < Vs
(2)
50
100
mV
10
20
40
A
10
20
40
A
4
25
s
Timing
tON
Output delay ON time
IO 1A
VS = 12V
(3) Figure 4
tf,r
Output fall and rise
time
IO 1A
VS = 12V
Figure 4
3
10
30
s
tOFF
Output delay OFF
time
IO 1A
VS = 12V
(3)
Figure 4
5
15
30
s
9/17
Electrical specifications
Table 6.
L9349-LF
Electrical characteristics (continued)
(VS = 4.5 to 32V; -40°C Tj1 150°C < Tj2 TjDIS, unless otherwise specified.)
Values Tj1
Symbol
Parameter
Unit
Min.
Diag. delay output
OFF time
(3)
tD IOU
Diagnostic open load
delay time
9V< VS 3A
H
H
off
L
SGND or PGND loss
channel off
X
L
off
H
SGND or PGND loss
channel on
H
H
off
L
Normal function
GND short
Load bypass
Open load
1.25V
IO1,2,3,4typ < 320mA
Tjtyp 190°C Overtemperature
Over load
10/17
L9349-LF
3.6
Electrical specifications
Circuit description
The L9349 is a quad low side driver for inductive loads like valves in automotive
environment. The internal pull down current sources at the ENable and INput pins assure in
case of open input conditions that the device is switched off. An output voltage slope
limitation for du/dt is implemented to reduce the EMI. An integrated active flyback voltage
limitation clamps the output voltage during the flyback phase to 50 V.
Each driver is protected against short circuit at VOUT < 32V and thermal overload. In short
circuit condition the output will be disabled after a short delay time tDOL. The thermal disable
for TJ > 180°C of the output will be reset if the junction temperature decreases about 20°C
below the disable threshold temperature.
The overtemperature, overload and groundloss information is stored until IN is low.
For the real time error diagnosis the voltage and the current of the outputs are compared
with internal fixed values VOUV for OFF and IOUC for ON conditions to recognize open load
(RL 20K, RL > 38) in OFF and ON conditions.
Also the output voltages VO1- 4 are compared to each other output in OFF condition with a
fixed offset of VOUV to recognize load bypasses. The VOUV diagnoses is suppressed
during the flyback phases of the compared output. The outputs 1 and 4 are compared for
VOUV and also outputs 2 and 3 are compared.
The diagnostic output level in connection with different ENable and INput conditions allows
to recognize different fail states, like overtemp, short to VS, short to GND, bypass to GND
and disconnected load (see Table 7: Diagnostic).
The diagnostic output is protected against short circuit. Exceeding the over load current
threshold IOOC, the output current will be limited internally during the diagnostic overload
delay switch-off time tDOL.
The device complies the ISO pulses imposed to the supply voltage of the valves without any
failures of the functionality. Therefore some diagnostic functions are internal filtered. The
following table shows the corresponding filter time for each detected signal.
Table 8.
Corresponding filter time for each detected signal
Overloading of output
(also shorted load to supply)
ON State
OFF State
EN and IN =
HIGH
EN or IN,
= LOW
X
Open load
(under voltage detection)
X
min.
Filter
time
Reset done by
4 s
INx = “LOW”
-
Open load
(under current detection)
X
-
Overtemperature
X
4 s
INx = “LOW”
Power-signal GND-loss
X
4 s
INx = “LOW”
Power-signal GND-loss
X
4 s
Openload difference
X
4s
11/17
Electrical specifications
Figure 3.
L9349-LF
tEO clamping time
VO1-4
VOCL
VS
t
tEO
T
00AT0027
Figure 4.
Output slope (resistive load for testing)
VIN
VEN
5V
VH
VL
t
VOUT
tON
tOFF
VS
0.85V S
VOUV
0.15V S
t
VDIAG
tf
VD
0.5V D
00AT0030
12/17
tr
tD H-L Diag
L9349-LF
Electrical specifications
Figure 5.
Timing (tDOL, tDIOU)
IN
VON
IOOC
IOUC
VD
tfilt
tDIOU
tDOL
Open Load Current
00AT0032
Figure 6.
Block diagram - Open load voltage detection
VBatt
L1 (L2)
OUT1
(OUT2)
L4 (L3)
OUT4
(OUT3)
IN1
IN4
RIO
RIO
VS
55%
±
+
+
±
Enable
R
Latch
Q
S
S
R
Latch
Q
00AT0033
VO UV1
VO UV4
13/17
Electrical specifications
Figure 7.
L9349-LF
Logic diagram
VEN
VIN
VO U
IOO
IOU
Figure 8.
Open Load Voltage
Normal
Operation OFF
Open Load Voltage
Open Load Current
Normal
Operation ON
Latch Reset
Latched
Over. Load
Diagnostic
Open Load Current
00AT0034
Normal
Operation ON
Open Load Current
VD
Application circuit diagram
+5V
VCC
I/O
IN1
I/O
D1
I/O
EN
OUT1
Channel 1
Z VALVE
VS
KL15
+45V
52V
IN4
Overtemp
+5V
R
Q
I/O
D4
S
Delay
Time
KL30
OUT4
Output Control
I/O
Z VALVE
R IO
Overload
μP
Controller
Diagnostic
Control
+5V
Openload
Channel 4
I/O
IN2
I/O
D2
Channel 2
OUT2
Z VALVE
+5V
GND
00AT0035
14/17
I/O
IN3
I/O
D3
Channel 3
OUT3
Z VALVE
GND
VBatt
L9349-LF
4
Package information
Package information
In order to meet environmental requirements, ST (also) offers these devices in ECOPACK®
packages. ECOPACK® packages are lead-free. The category of second Level Interconnect
is marked on the package and on the inner box label, in compliance with JEDEC Standard
JESD97. The maximum ratings related to soldering conditions are also marked on the inner
box label.
ECOPACK is an ST trademark. ECOPACK specifications are available at: www.st.com.
Figure 9.
PowerSO-20 mechanical data and package dimensions
DIM.
mm
MIN.
TYP.
A
a1
inch
MAX.
MIN.
TYP.
3.6
0.1
0.3
a2
0.004
0.012
3.3
0.130
a3
0
0.1
0.000
0.004
b
0.4
0.53
0.016
0.021
c
0.23
0.32
0.009
0.013
D (1)
15.8
16
0.622
0.630
D1 (2)
9.4
9.8
0.370
0.386
E
13.9
14.5
0.547
e
1.27
e3
E1 (1)
0.570
0.450
11.1
E2
0.429
0.437
2.9
0.114
E3
5.8
6.2
0.228
G
0
0.1
0.000
0.004
H
15.5
15.9
0.610
0.626
h
L
0.244
1.1
0.8
1.1
0.043
0.031
N
8˚(typ.)
S
8˚(max. )
T
Weight: 1.9gr
0.050
11.43
10.9
OUTLINE AND
MECHANICAL DATA
MAX.
0.142
10
JEDEC MO-166
0.043
0.394
PowerSO-20
(1) “D and E1” do not include mold flash or protusions.
- Mold flash or protusions shall not exceed 0.15mm (0.006”)
- Critical dimensions: “E”, “G” and “a3”.
(2) For subcontractors, the limit is the one quoted in jedec MO-166
N
R
N
a2
b
A
e
DETAIL A
c
a1
DETAIL B
E
e3
H
DETAIL A
lead
D
slug
a3
DETAIL B
20
11
0.35
Gage Plane
-C-
S
SEATING PLANE
L
G
E2
E1
BOTTOM VIEW
C
(COPLANARITY)
T
E3
1
h x 45˚
1
0
PSO20MEC
D1
0056635 I
15/17
Revision history
5
L9349-LF
Revision history
Table 9.
16/17
Document revision history
Date
Revision
Changes
20-Sep-2002
4
Initial release.
09-Sep-2008
5
Document reformatted.
Updated feature and description on page 1.
Added Table 1: Device summary on page 1.
Updated Table 3: Absolute maximum ratings on page 7.
20-Sep-2013
6
Updated disclaimer.
L9349-LF
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