®
L9338
QUAD LOW SIDE DRIVER
WIDE INPUT VOLTAGE RANGE FROM -24V
UP TO +45V
WIDE OPERATING SUPPLY VOLTAGE
RANGE FROM 4.5V UP TO 32V
REVERSE BIASING PROTECTED (V
S
= -24V)
VERY LOW STANDBY QUIESCENT CUR-
RENT < 2µA
PROGRAMMABLE SIGNAL TRANSFER PO-
LARITY
TTL AND CMOS COMPATIBLE INPUTS
DEFINED OUTPUT OFF STATE OFF FOR
OPEN INPUTS
FOUR OPEN DRAIN DMOS OUTPUTS, WITH
R
DSon
= 1.5
Ω
at 25°C and V
S
> 6V
OUTPUT CURRENT LIMITATION
CONTROLLED OUTPUT SLOPE FOR LOW EMI
OVERTEMPERATURE SHUT-DOWN
INTEGRATED OUTPUT CLAMPING FOR
FAST INDUCTIVE RECIRCULATION V
FB
> 45V
STATUS MONITORING FOR
- OVERTEMPERATURE
- DISCONNECTED GROUND OR SUPPLY
BLOCK DIAGRAM
IN4
CHANNEL 4
ORDERING NUMBERS:
L9338D (SO20)
L9338MD (SO20 (12+4+4))
VOLTAGE
ESD: ALL PINS ARE GUARANTEED TILL 2kV
HUMAN BODY MODEL
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
relais in automotive or industrial applications.
OUT4
OUT1
IN1
=
&
CHANNEL 1
4
PRG
THERMAL
SHUTDOWN
DIAG
DIAGNOSTIC
LOGIC
EN
Vint
REFERENCE Vlogic
GND VS
D95AT149
March 2000
1/8
L9338
THERMAL DATA
Symbol
R
th (j-pins)
R
th (j-amb)
T
jMon
Parameter
Thermal resistance junction to pin
Thermal resistance junction to ambient mounted on
SMPCB2 board
Temperature-monitoring
Switch-off-level
Switch-on-level
SO20
(2)
–
77 to 97
SO(12+4+4)
(1)
14 (Typ.)
–
Unit
°C/W
°C/W
°C
°C
160 to 190
140 to 170
(1) See SGS-THOMSON Microelectronics databook:"Thermal Management in Surface Mount Technology"
(2) See SGS-THOMSON Microelectronics databook:"Thermal characteristics of SO20"
OPERATING CONDITIONS
(The electrical characteristics are valid within the below defined operating
ranges, unless otherwise specified. The function will be guaranted by design until T
jMON
switch-OFF-level.
Symbol
V
S
V
IN
V
EN
V
OUT
, V
D
T
j
Supply Voltage
Input pin voltage
Enable pin voltage
Output pin voltage
Junction temperature
Parameter
Value
4.5 to 32
-24 to 45
-24 to 45
-0.3 to 45
-40 to 150
Unit
V
V
V
V
°C
ELECTRICAL CHARACTERISTICS
(Refer to the test circuit, unless otherwise specified.)
Symbol
I
Q
Parameter
Quiescent current
Test Condition
-0.3V
≤
V
EN
≤
0.5V;
V
S
= 14V; T
j
= 85°C
EN = high; V
S
≤
14V
Inputs IN1 - IN4, PRG
V
INIlow
V
INhigh
Input voltage LOW
Input voltage HIGH
-24V
≤
Vi
≤
10V
-24
2.8
-10
-24
3.2
-24V < V
i
< 2.5V
2.5V
≤
Vi
≤
25V
V
S
≥
6V, I
O
= 0.3A
T
j
= 25°C
T
j
= 125°C
V
O
= V
S
= 14V; T
j
= 85°C
time < 200µs; 10mA
≤
Io
≤
0.3A
V
O
≥
4.5V
I
DL
≤
1mA
Internal current limitation
V
S
= 14V; T
J
= 85°C
0.3
5
≤
0.1
45
400
10
20
50
2.0
45
15
1
VS
V
V
µA
V
V
KΩ
µA
Min.
Typ.
<2
1.5
Max.
10
2
Unit
µA
mA
Input current
I
IN
Enable Input EN
V
ENlow
V
ENhigh
R
EN
Input voltage LOW
Input voltage HIGH
Input impedance
I
EN
Input current
Outputs OUT1-OUT4
R
DSon
Output ON-resistor to ground
1.7
≤1
52
700
I
OLeak
V
OClamp
I
OSC
C
O
V
Dlow
I
Dmax
I
Dleak
Leakage current
Output voltage during clamping
Short-circuit current
Internal output capacities
Output voltage LOW
Max. Output current
Leakage current
2.3
3.5
5
60
1200
100
0.5
15
1
Ω
Ω
µA
V
mA
pF
V
mA
µA
Diagnostic output DIAG
1
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L9338
CIRCUIT DESCRIPTION
The L9838 is a quad low side driver for lines,
lamps or inductive loads in automotive and indus-
trial applications.
All INputs are TTL or CMOS compatible. This al-
lows the device to be driven directly by a micro-
controller. For the noise immunity, all inputs have
a Schmitt-trigger with a hysteresis of typ. 100mV.
Each input stage has an input voltage protection
from -24V to 45V. The device can be activated
with a ’high’ signal on ENable input. ENable ’low’
switches the device into the sleep mode. In this
mode the quiescent current is less than 10µA. A
high signal on PRoGramming input changes the
signal transfer polarity from noninverting into the
inverting mode. Normally this pin is connected to
V
S
or GND. These pins (PRG and EN) are inter-
nally fixed at low status by open input condition.
Independent of the PRoGramming input, the
OUTput switches off, if the signal INput pin is not
connected.
Each output driver has a current limitation of min
0.4A and a seperate thermal shut-down. The ther-
mal shut-down deactivates that output which ex-
ceeds 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 285mA without acti-
vating thermal shut-down at 85°C ambient tem-
perature (SO20). The slew rate of the output is
limited to max. 14V/µs to reduce the electromag-
netic interference, but not for the enable transfer
characteristic (see fig. 1). An integrated active fly-
back voltage limitation clamps the output voltage
during the flyback phase of inductive loads to typ.
50V. The power DMOS switches ON, if the device
is enabled and the OUTput swings below ground.
This protection avoids the activation of parasitics
inside the power DMOS.
The DIAGnostic 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, discon-
nected 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 overtemperature.
DIAGNOSTIC TABLE
Pins
Normal function
H
H
H
H
L
Overtemperature,
disconnected ground or
supply voltage
Overtemperature
H
EN
L
L
H
H
X
L
PRG
L
H
L
H
X
X
IN
OUT
L (on)
H (off)
H (off)
L (on)
H (off)
H (off) *
DIAG
L (on)
L (on)
H(off)
H(off)
H(off)
H (off)
H
H
X
H (off) *
L (on)
X = not relevant * selective for each channel at overtemperature
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Embedded System
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