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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 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. The output voltages are also compared with each other in OFF condition with a fixed offset, in order to recognize load bypasses. If the over load current threshold is exceeded, the output current will be limited internally during the diagnostic overload delay switch-off time. 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.
PowerSO-20

Description
The L9349 is a monolithic IC designed to drive inductive loads in low side configurations like hydraulic valves used in ABS systems. Particular care has been taken to protect the device against failures, to avoid electromagnetic interferences and to offer extensive real time diagnostics. 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. An output voltage slope limitation is implemented to reduce the EMI. Table 1. Device summary
Order code L9349-LF L9349TR-LF
Package(1) PowerSO-20 PowerSO-20
Packing Tray Tape and reel
1. ECOPACK(R) package (see Section 4: Package information)
September 2008
Rev 5
1/17
www.st.com 1
Contents
L9349-LF
Contents
1 2 3 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Pins description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.1 3.2 3.3 3.4 3.5 3.6 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Electrical characteristics (operating range) . . . . . . . . . . . . . . . . . . . . . . . . 8 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Diagnostic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Circuit description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4 5
Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 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. 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
4/17
L9349-LF
Block diagram
1
Block diagram
Figure 1.
IN1 D1 EN
Block diagram
Channel 1
OUT1
VS
52V Output Control IN4 R Q D4 Diagnostic Control Channel 4 Openload S Delay Time Overtemp R IO OUT4
Overload
IN2 D2
Channel 2
OUT2
IN3 D3
Channel 3
OUT3
00AT0025
GND
5/17
Pins description
L9349-LF
2
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.
N 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Pins description
Pin PGND Out1 D1 IN4 VS NC IN3 D2 Out2 PGND PGND Out3 D3 IN2 GND EN IN1 D4 Out4 PGND Power Ground Output 1 (5A) Diagnostic 1 Input 4 Supply Voltage Not Connected Input 3 Diagnostic 2 Output 2 (5A) Power Ground Power Ground Output 3 (3A) Diagnostic 3 Input 2 Signal Ground Common Enable Input 1 Diagnostic 4 Output 4 (3A) Power Ground Function
6/17
L9349-LF
Electrical specifications
3
3.1
Electrical specifications
Absolute maximum ratings
Table 3.
Symbol VS VSP
dVS/dt
Absolute maximum ratings
Parameter DC supply voltage Supply voltage pulse (duration <200ms) Supply voltage slope Input voltage Diagnostic DC output voltage DC output voltage DC output current out 1, 2 DC output current out 3, 4 Reverse output current Reverse output current Switch-off energy for inductive loads GND potential difference tEO = 250s,(1)
I10mA
I
Conditions
Value -0.3 to 32 -0.3 to 45 10 -1.5 to 6 -0.3 to 16 -0.3 to 45 >5 (Min.) internal limited (Max.) >3 (Min.) internal limited (Max.) -5 -3 50 30 0.3 175 190 -40 to TjDIS -55 to 150 180 to 210
Unit V V V/s V V V A A A A mJ mJ V C C C C C kV kV
VIN, EN VD VODC IO1, 2 IO3, 4 IOR1, 2 IOR3, 4 EO1, 2 EO3, 4
VGND
50mA
T = 5ms Tj = -40 to 150C
TjEO Tj Tstg TjDIS ESD ESD
Junction temperature during switch- t 30 min off t 15 min Junction temperature Storage temperature Thermal disable junction temperature threshold Electrostatical discharging OUT1 - 4 MIL883C vs. Common-GND (PGNDs + GND)
+-2 +-4
1. tEO is the clamping time (see Figure 3)
3.2
Thermal data
Table 4.
Symbol
Thermal data
Parameter Value 3 Unit C/W
RTh j-case Thermal resistance junction to case
7/17
Electrical specifications
L9349-LF
3.3
Electrical characteristics (operating range)
The electrical characteristics are valid within the below defined operating range, unless otherwise specified.
Table 5.
Symbol VS Tj1 Tj2
Electrical characteristics (operating range)
Parameter Board supply voltage Junction temperature Test Condition Min. 4.5 -40
t
Typ. 12
Max. 32 150 TjDIS
Unit V C C
15min (1) over life time
150
1. Parameters guaranteed by correlation
3.4
Table 6.
Electrical characteristics
Electrical characteristics (VS = 4.5 to 32V; -40C Tj1 150C < Tj2 TjDIS, unless otherwise specified.)
Values Tj1 Values Tj2 Unit Min. Typ. Max. Min. Max. Parameter Test conditions
Symbol
Supply IVS OFF IVS ON DC supply current Off EN = 1.0V DC supply current On VS 14V; VIN, VEN = 2V 5 8 10 mA mA
Diagnostic outputs D1 - D4 VDL IDLE Diagnostic output low voltage Diagnostic output leakage current ID 3mA VD = 14V (1) 0.65 0.1 1.0 2 1.5 20 V
A
Outputs Out 1 - Out 4 Tj = 25C Tj = 150C VS > 9.5V IO1,2 = 2A Output On resistance RDSON 3, 4 Tj = 25C Tj = 150C VS > 9.5V IO3,4 = 1.3A IOCL 200mA VS > 9.5V EN = 0V VIN = 1V 45 10 0.525 x VS 0.55 x VS 300 500
RDSON 1, 2
200
m
300
450 750
m
VZ RO VOUV 1-4
Z-diode clamping voltage Output pull down resistor Open load voltage threshold
60 40 0.575 x VS 50
V k V
8/17
L9349-LF Table 6.
Electrical specifications Electrical characteristics (continued) (VS = 4.5 to 32V; -40C Tj1 150C < Tj2 TjDIS, unless otherwise specified.)
Values Tj1 Values Tj2 Unit Min. Typ. 0.003 x VS VIN1,4/2,3 = 1V VS 16V VOc 4.5V VOC = output voltage of other channel Max. Min. Max. V Parameter Test conditions
Symbol
VOUV hys 1-4 Hysteresis
VOUV 1-4,
2-3, 4-1, 3-2
Open load difference voltage threshold
VOC 1.0V
VOC 1.25V
VOC 1.5V
V
VOUV hys 14, 2-3, 4-1, 3-2
Open load hysteresis Open load current threshold Over load current threshold Thermal shut down Thermal shut down hysteresis OUT leakage current VOUT = 20V VS = 0V VEN=VIN=2V; VS=6.5 - 16V VS > 6.5V; VOUT = 32V
40
mV
IOUC 1, 2, 3, 4 IOOC 1, 2 IOOC 3, 4 TSD TSD-hys IOUT-LE
160 5 3 180
320 10 6 195 20
480
mA A A
210
C C
5
A
Inputs IN1-4, EN VIN,EN L VIN,EN H VEN,IN hys IIN IEN Timing IO = 1A VS = 12V (3) Figure 4 IO = 1A VS = 12V Figure 4 IO = 1A VS = 12V (3) Figure 4 3 Logic input/enable low voltage Logic input/enable high voltage Logic input hysteresis Input sink current Enable sink current 2V < VIN, VEN < 6V VIN, VEN < Vs
(2)
-0.3 IN, EN 2.0 50 10 10 100 20 20
1 6
V V mV
40 40
A A
tON
Output delay ON time
4
25
s
tf,r
Output fall and rise time
10
30
s
tOFF
Output delay OFF time
5
15
30
s
9/17
Electrical specifications Table 6. Electrical characteristics (continued) (VS = 4.5 to 32V; -40C Tj1 150C < Tj2 TjDIS, unless otherwise specified.)
Values Tj1 Symbol Parameter Diag. delay output OFF time Diagnostic open load delay time Test conditions Min. tDH-L, Diag tD IOU tDOL tfilt PGND PGNDloss,h PGNDloss,l Power GND loss threshold high Power GND loss threshold low 3 2
(3)
L9349-LF
Values Tj2 Unit Max. 65 Min. Max. 90
s
Typ.
Figure 4
8 8 6 4
9V< VS <16V, Figure 5
50 65 24
s
Diagnostic overload 9V< VS <16V, Figure 5 delay switch-OFF time Filter time
s s
V V
1. The diagnostic output is short circuit protected up to VD = 16V 2. Open pins (EN, IN) are detected as low 3. VS = 9 to 16V IOUC IO IOOC
3.5
Diagnostic
Table 7. Diagnostic
Conditions EN L Normal function H H GND short Load bypass Open load VOtyp < 0.55VS
VO1-4/2-3
IN X L H X L H X H L H
OUT off off on off off on off off off off
DIAG. L L H H H L L L H L
L H H X H X H
1.25V
IO1,2,3,4typ < 320mA
Tjtyp 190C Overtemperature Over load SGND or PGND loss SGND or PGND loss IOmin 1,2 > 5A IOmin 3,4 > 3A channel off channel on
10/17
L9349-LF
Electrical specifications
3.6
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 > 180C of the output will be reset if the junction temperature decreases about 20C 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
ON State EN and IN = HIGH Overloading of output (also shorted load to supply) Open load (under voltage detection) Open load (under current detection) Overtemperature Power-signal GND-loss Power-signal GND-loss Openload difference X X X X X X X OFF State EN or IN, = LOW min. Filter time 4s 4s 4s 4s 4s INx = "LOW" INx = "LOW" Reset done by
INx = "LOW"
11/17
Electrical specifications Figure 3.
VO1-4 VOCL
L9349-LF
tEO clamping time
VS tEO T
00AT0027
t
Figure 4.
VIN VEN 5V VH VL
Output slope (resistive load for testing)
t VOUT tON tOFF
VS 0.85V S VOUV 0.15V S t VDIAG tf VD 0.5V D tr tD H-L Diag
00AT0030
12/17
L9349-LF Figure 5.
IN
Electrical specifications Timing (tDOL, tDIOU)
VON
IOOC IOUC
VD tDIOU
00AT0032
tfilt Open Load Current tDOL
Figure 6.
Block diagram - Open load voltage detection
VBatt
L1 (L2) OUT1 (OUT2) OUT4 (OUT3)
L4 (L3)
IN1 RIO VS RIO
IN4
55%
+
+
Enable R Latch Q
S S R Latch Q
00AT0033
VO UV1
VO UV4
13/17
Electrical specifications Figure 7.
VEN
L9349-LF
Logic diagram
VIN
VO U
IOO IOU
VD
Normal Operation ON Open Load Current Open Load Current Normal Operation ON Open Load Current Latch Reset Latched Over. Load Diagnostic Open Load Voltage Open Load Voltage Normal Operation OFF
Z VALVE VS +45V 52V Output Control I/O +5V R Q I/O D4 Diagnostic Control Channel 4 I/O I/O +5V IN2 D2 Channel 2 S Delay Time IN4 Overtemp R IO OUT4 Z VALVE VBatt KL30 KL15 Z VALVE Z VALVE
00AT0034
Figure 8.
Application circuit diagram
+5V
VCC I/O I/O I/O IN1 D1 EN Channel 1 OUT1
Overload
P
Controller +5V Openload
OUT2
I/O I/O
IN3 D3 Channel 3
OUT3
GND
00AT0035
GND
14/17
L9349-LF
Package information
4
Package information
In order to meet environmental requirements, ST (also) offers these devices in ECOPACK(R) packages. ECOPACK(R) 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. A a1 a2 a3 b c D (1) D1 (2) E e e3 E1 (1) E2 E3 G H h L N S T 10 0.8 5.8 0 15.5 10.9 0 0.4 0.23 15.8 9.4 13.9 1.27 11.43 11.1 2.9 6.2 0.1 15.9 1.1 1.1 0.031 8(typ.) 8(max. ) 0.394 0.228 0.000 0.610 0.429 0.1 mm MIN. TYP. MAX. 3.6 0.3 3.3 0.1 0.53 0.32 16 9.8 14.5 0.000 0.016 0.009 0.622 0.370 0.547 0.050 0.450 0.437 0.114 0.244 0.004 0.626 0.043 0.043 JEDEC MO-166 0.004 MIN. inch TYP. MAX. 0.142 0.012 0.130 0.004 0.021 0.013 0.630 0.386 0.570
Weight: 1.9gr
OUTLINE AND MECHANICAL DATA
(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
PowerSO-20
N
N a2 b e A
R
c DETAIL B a1 E DETAIL A
DETAIL A e3 H
lead
D a3 DETAIL B
20 11
Gage Plane 0.35
slug
-C-
S E2 T E1 BOTTOM VIEW
L
SEATING PLANE G C
(COPLANARITY)
E3
1 1 0
h x 45
PSO20MEC
D1
0056635 I
15/17
Revision history
L9349-LF
5
Revision history
Table 9.
Date 20-Sep-2002
Document revision history
Revision 4 Initial release. 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. Changes
09-Sep-2008
5
16/17
L9349-LF
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