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 < 2
A
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
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
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.
March 2000
=
&
THERMAL
SHUTDOWN
CHANNEL 1
DIAGNOSTIC
LOGIC
4
REFERENCE
Vint
Vlogic
CHANNEL 4
IN4
IN1
PRG
EN
VS
GND
OUT4
OUT1
DIAG
D95AT149
BLOCK DIAGRAM
ORDERING NUMBERS: L9338D (SO20)
L9338MD (SO20 (12+4+4))
1/8
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
PIN DESCRIPTION
SO20
N
o
SO 12+4+4
N
o
Pin Name
Function
2
8
VS
SUPPLY VOLTAGE
9
4,5,6,7,14,
15,16,17
GND
GROUND
6
11
EN
ENABLE
15
20
PRG
PROGRAM
19
3
DIAG
DIAGNOSTIC
16
1
IN1
INPUT 1
17
2
IN2
INPUT 2
4
9
IN3
INPUT 3
5
10
IN4
INPUT 4
14
19
OUT 1
OUTPUT 1
13
18
OUT 2
OUTPUT 2
8
13
OUT 3
OUTPUT 3
7
12
OUT 4
OUTPUT 4
3, 18, 1, 10, 11,
12, 20
NC
NOT CONNECTED
PIN CONNECTIONS (Top view)
N.C.
VS
N.C.
IN3
IN4
OUT4
EN
OUT3
GND
N.C.
OUT2
OUT1
IN1
PRG
IN2
N.C.
DIAG
N.C.
1
3
2
4
5
6
7
8
9
18
17
16
15
14
12
13
11
19
10
20
N.C.
N.C.
D94AT120B
SO20
IN1
IN2
DIAG
GND
GND
GND
GND
VS
IN3
OUT4
OUT3
GND
GND
GND
GND
OUT2
OUT1
PRG
1
3
2
4
5
6
7
8
9
18
17
16
15
14
12
13
11
19
10
20
IN4
EN
D94AT121A
SO20 (12+4+4)
L9338
2/8
THERMAL DATA
Symbol
Parameter
SO20 (2)
SO(12+4+4) (1)
Unit
R
th (j-pins)
Thermal resistance junction to pin
14 (Typ.)
C/W
R
th (j-amb)
Thermal resistance junction to ambient mounted on
SMPCB2 board
77 to 97
C/W
T
jMon
Temperature-monitoring
Switch-off-level
Switch-on-level
160 to 190
140 to 170
C
C
(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 guarantedby design until T
jMON
switch-OFF-level.
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 CHARACTERISTICS (Refer to the test circuit, unless otherwise specified.)
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 - IN4, PRG
V
INIlow
Input voltage LOW
-24
2.0
V
V
INhigh
Input voltage HIGH
2.8
45
V
I
IN
Input current
-24V
Vi
10V
-10
15
A
Enable Input EN
V
ENlow
Input voltage LOW
-24
1
V
V
ENhigh
Input voltage HIGH
3.2
VS
V
R
EN
Input impedance
-24V < V
i
< 2.5V
10
K
I
EN
Input current
2.5V
Vi
25V
20
50
A
Outputs OUT1-OUT4
R
DSon
Output ON-resistor to ground
V
S
6V, I
O
= 0.3A
T
j
= 25
C
T
j
= 125
C
1.7
2.3
3.5
I
OLeak
Leakage current
V
O
= V
S
= 14V; T
j
= 85
C
1
5
A
V
OClamp
Output voltage during clamping
time < 200
s; 10mA
Io
0.3A
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
1mA
0.3
0.5
V
I
Dmax
Max. Output current
Internal current limitation
1
5
15
mA
I
Dleak
Leakage current
V
S
= 14V; T
J
= 85
C
0.1
1
A
L9338
3/8
ELECTRICAL CHARACTERISTICS (Continued)
Symbol
Parameter
Test conditions
Min.
Typ.
Max.
Unit
Timing (see Fig. 1)
t
d, on
On delay time
V
S
= 14V, C
ext
= 0pF
10mA
I
O
200mA
2.5
3.5
s
t
d, off
Off delay time
3
4.5
s
t
set
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
V
EN
V
INhigh
V
INlow
active
t
V
PRG
V
INhigh
V
INlow
Inverting Mode
t
Non-Inverting Mode
V
IN
V
INhigh
V
INlow
t
V
OUT
1/2V
S
t
V
S
tset
td,off
td,on
td,off
td,on
td,off
td,on
tset
D95AT150
No controlled output slope for enable low
Figure 1
L9338
4/8
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 10
A. 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/
s 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
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)
Overtemperature,
disconnected ground or
supply voltage
H
L
X
H (off) *
H (off)
Overtemperature
H
H
X
H (off) *
L (on)
X = not relevant * selective for each channel at overtemperature
L9338
5/8
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