This is information on a product in full production.
September 2013 Doc ID 1766 Rev 5 1/14
1
L9338
Quad low side driver
Datasheet production data
Features
■
Wide input voltage range from -24 V up to +45 V
■Wide operating supply voltage range from
4.5 V up to 32 V
■Reverse biasing protected (VS = -24 V)
■Very low standby quiescent current < 2 µA
■Programmable signal transfer polarity
■TTL and CMOS compatible inputs
■Defined output off state off for open inputs
■Three open drain DMOS outputs, with
RDSon =1.5 . at 25 °C and VS > 6 V
■Output current limitation
■Controlled output slope for low EMI
■Over temperature shut-down
■Integrated output clamping for fast inductive
recirculation VFB > 45 V
■Status monitoring for:
– Over temperature
– Disconnected ground or supply voltage
■ESD: all pins are guaranteed till 2 kV human
body mode
Description
The L9338 is a monolithic integrated quad low
side driver realized in advanced Multipower-BCD
technology. It is intended to drive lines, lamps or
relays in automotive or industrial applications.
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SO20
Table 1. Device summary
Order code Package Packing
E-L9338MD SO20 Tube
E-L9338MD/TR SO20 Tape and reel
www.st.com
Contents L9338
2/14 Doc ID 1766 Rev 5
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 Operating condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.4 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
4 Circuit description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
5 Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
6 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
L9338 List of tables
Doc ID 1766 Rev 5 3/14
List of tables
Table 1. Device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Table 2. Pins function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Table 3. Absolute maximum ratings (no damage or latch) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Table 4. Thermal data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Table 5. Operating condition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Table 6. Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Table 7. Diagnostic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Table 8. Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
List of figures L9338
4/14 Doc ID 1766 Rev 5
List of figures
Figure 1. Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Figure 2. Pins connection diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Figure 3. Timing diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Figure 4. Application circuit for inverting transfer polarity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Figure 5. SO20 mechanical data and package dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
L9338 Block diagram
Doc ID 1766 Rev 5 5/14
1 Block diagram
Figure 1. Block diagram
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Pins description L9338
6/14 Doc ID 1766 Rev 5
2 Pins description
Figure 2. Pins connection diagram
Table 2. Pins function
Pin # Pin name Function
1 IN1 Input 1
2 IN2 Input 2
3 DIAG Diagnostic
4,5,6,7,14, 15,16,17 GND Ground
8 VS Supply voltage
9 IN3 Input 3
10 IN4 Input 4
11 EN Enable
12 OUT 4 Output 4
13 OUT 3 Output 3
18 OUT 2 Output 2
19 OUT 1 Output 1
20 PRG Program
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L9338 Electrical specifications
Doc ID 1766 Rev 5 7/14
3 Electrical specifications
3.1 Absolute maximum ratings
3.2 Thermal data
3.3 Operating condition
The electrical characteristics are valid within the below defined operating ranges, unless
otherwise specified. The function will be guaranteed by design until TjMON switch-OFF-level.
Table 3. Absolute maximum ratings (no damage or latch)
Symbol Parameter Value Unit
V
S
Supply voltage -24 to 45 V
Pin voltages
V
IN
Input, enable, program -24 to 45 V
V
OUT
Output -0.3 to 45 V
V
DIAG
Diagnostic output -0.3 to 45 V
Table 4. Thermal data
Symbol Parameter Value Unit
R
th (j-pins)
Thermal resistance junction-to-pin 14 (Typ.) C/W
T
jMon
Temperature-monitoring
Switch-off-level
Switch-on-level
160 to 190
140 to 170
C
C
Table 5. Operating condition
Symbol Parameter Value Unit
V
S
Supply voltage 4.5 to 32 V
V
IN
Input pin voltage -24 to 45 V
V
EN
Enable pin voltage -24 to 45 V
V
OUT
, V
D
Output pin voltage -0.3 to 45 V
T
j
Junction temperature -40 to 150 C
Electrical specifications L9338
8/14 Doc ID 1766 Rev 5
3.4 Electrical characteristics
Table 6. Electrical characteristics
Symbol Parameter Test Condition Min. Typ. Max. Unit
I
Q
Quiescent current
-0.3V V
EN
0.5V;
V
S
= 14V; T
j
= 85°C - < 2 10 A
EN = high; V
S
14V - 1.5 2 mA
Inputs IN1 - IN3, PRG
V
INIlow
Input voltage low - -24 - 2.0 V
V
INhigh
Input voltage high - 2.8 - 45 V
I
IN
Input current -24 V V
i
10 V -10 - 15 A
Enable input EN
V
ENlow
Input voltage low - -24 - 1 V
V
ENhigh
Input voltage high - 3.2 - V
S
V
R
EN
Input impedance -24V < V
i
< 2.5V 10 - - k
I
EN
Input current 2.5V V
i
25V - 20 50 A
Outputs OUT1-OUT3
R
DSon
Output on-resistor to ground
V
S
6 V, I
O
= 0.3 A
T
j
= 25 °C
T
j
= 125 °C
-1.7 2.3
3.5
I
OLeak
Leakage current V
O
= V
S
= 14 V; T
j
= 85 °C - 1 5 A
V
OClamp
Output voltage during clamping time < 200 s; 10 mA Io 0.3 A 45 52 60 V
I
OSC
Short-circuit current - 400 700 1200 mA
C
O
Internal output capacities V
O
4.5V - - 100 pF
Diagnostic output DIAG
V
Dlow
Output voltage low I
DL
1 mA - 0.3 0.5 V
I
Dmax
Max. Output current Internal current limitation 1 5 15 mA
I
Dleak
Leakage current V
S
= 14 V; T
J
= 85 °C - 0.1 1 A
Timing (see Figure 3)
td,on On delay time
V
S
= 14 V, C
ext
= 0 pF
10 mA I
O
200m A
- 2.5 3.5 s
td,off Off delay time - 3 4.5 s
tset Enable settling time - - 10 s
t
d,DIAG
On or off diagnostic delay time - - 10 s
S
out
Output slopes 2.5 9 16 V/s
L9338 Electrical specifications
Doc ID 1766 Rev 5 9/14
Figure 3. Timing diagram
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Circuit description L9338
10/14 Doc ID 1766 Rev 5
4 Circuit description
The L9338 is a quad low side driver for lines, lamps or inductive loads in automotive and
industrial applications.
All inputs are TTL or CMOS compatible. This allows the device to be driven directly by a
microcontroller. For the noise immunity, all inputs have a Schmitt-trigger with a hysteresis of
typ. 100 mV.
Each input stage has an input voltage protection from -24 V to 45 V. The device can be
activated with a ’high’ signal on Enable (EN) input. Enable ’low’ switches the device into the
sleep mode. In this mode the quiescent current is less than 10 mA. A high signal on
programming (PRG) input changes the signal transfer polarity from non inverting into the
inverting mode. Normally this pin is connected to VS or GND. These pins (PRG and EN) are
internally fixed at low status by open input condition.
Independent of the programming input, the output (OUT) switches off, if the signal input (IN)
pin is not connected.
Each output driver has a current limitation of min. 0.4 A and a separate thermal shut-down.
The thermal shut-down deactivates that output which exceeds temperature switch off level.
About 20K below this temperature threshold the output will be activated again. This means,
that each output is able to sink continuously 285 mA without activating thermal shut-down at
85 °C ambient temperature. The slew rate of the output is limited to max. 14 V/ms to reduce
the electromagnetic interference, but not for the enable transfer characteristic (see
Figure 3). An integrated active flyback voltage limitation clamps the output voltage during
the flyback phase of inductive loads to typ. 50 V. The power DMOS switches ON, if the
device is enabled and the output swings below ground. This protection avoids the activation
of parasitic inside the power DMOS.
The diagnostic (DIAG) is an open drain output. The logic status depends on the
programming pin. If the PRG pin is ’low’ the DIAG output becomes low, if the device works
correctly.
At thermal shut-down of one channel, disconnected ground or supply voltage the diagnostic
output becomes high. If the PRG pin is ’high’ this output is switched off at normal function
and switched on at over temperature.
Table 7. Diagnostic
Pins EN PRG IN OUT DIAG
Normal function
H L L L (on) L (on)
H L H H (off) L (on)
H H L H (off) H(off)
H H H L (on) H(off)
L X X H (off) H(off)
Over temperature, disconnected
ground or supply voltage H L X H (off)
(1)
1. Selective for each channel at over temperature.
X = not relevant.
H (off)
Over temperature H H X H (off)
(1) L (on)
L9338 Circuit description
Doc ID 1766 Rev 5 11/14
Figure 4. Application circuit for inverting transfer polarity
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Package information L9338
12/14 Doc ID 1766 Rev 5
5 Package information
In order to meet environmental requirements, ST offers these devices in different grades of
ECOPACK® packages, depending on their level of environmental compliance. ECOPACK®
specifications, grade definitions and product status are available at: www.st.com.
ECOPACK® is an ST trademark.
Figure 5. SO20 mechanical data and package dimensions
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L9338
14/14 Doc ID 1766 Rev 5
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