Timer capacitor; the capacitor defines the time for the channel 1 shut down, after overload of
the external MOS transistor has been detected.
Supply voltage.
Timer capacitor; the capacitor defines the time for the channel 2 shut down, after overload of
the external MOS transistor has been detected.
Programming resistor for overload detetcion threshold; the resistor from this pin to ground
defines the drain pin current and the charging of the timer capacitor.
T1
VS
N.C.
T2
PR
IN3
IN2
IN1
ENG2
GNDG3
2
3
4
5
6
7
8
9
10
D98AT391
20
19
18
17
16
15
14
13
12
11
Function
6IN3Input 3; equal to IN1.
7IN2Input 2; equal to IN1.
8IN1
Input 1; logic signal applied to this pin controls the driver 1; this pin features a current source
to assure defined high status when the pin is open.
9ENEnable logic signal high on this pin enables all channels
10GNDGround
11G3Gate 3 driver output; current source from CP or ground
12G2Gate 2 driver output; current source from CP or ground
14S2Source 2 sense input; monitors the source voltage.
15S1Source 1 sense input; monitors the source voltage.
16G1Gate 1 driver output; current source from CP or ground
17D2
19D1
Drain 2 sense input; a programmable input bias current defines the drop across the external
resistor R
; this drop fixes the overload threshold of the external MOS.
D1
Drain 1 sense input; a programmable input bias current defines the drop across the external
resistor R
; this drop fixes the overload threshold of the external MOS.
D1
Charge pump capacitor; a alternating current source at this pin charges the connected
20CP
capacitor C
to a voltage 10V higher than VS; the charge stored in this capacitor is than used
CP
to charge all the three gates of the power MOS transistors.
3, 13, 18NCNot connected
CP1
D1
N.C.
D2
G1
S1
S2
N.C.
6/18 Doc ID 5853 Rev 3
L9380Electrical specifications
3 Electrical specifications
3.1 Absolute maximum ratings
Table 3.Absolute maximum ratings
SymbolParameterValueUnit
V
V
ΔV
V
IN,EN
V
V
D, G, S
V
D, G, S
I
D, G, S
T
DC supply voltage-0.3 to +27V
S
Supply voltage pulse (t ≤ 400 ms)45V
S
/dtSupply voltage slope-10 to +10V/µs
S
Input / enable voltage-0.3 to +7V
Timer voltage-0.3 to 27V
T
Drain, gate, source voltage-15 to +27V
Drain, gate, source voltage pulse (t ≤ 400 ms)45V
Drain, gate, source current (t ≤ 2 ms)0 to +4mA
T
Operating junction temperature-40 to 150°C
j
Storage temperature-65 to 150°C
stg
Note:ESD for all pins, except the timer pins, are according to MIL 883C, tested at 2 kV,
corresponds to a maximum energy dissipation of 0.2 mJ.
The timer pins are tested with 800 V.
3.2 Thermal data
Table 4.Thermal data
SymbolParameterValueUnit
R
th j-amb
Thermal resistance junction-to-ambient100°C/W
3.3 Electrical characteristics
7V ≤ VS ≤ 18.5 V; -40° C ≤ TJ ≤ 150 °C, unless otherwise specified.
Table 5.Electrical characteristics
SymbolParameterTest conditionMin. Typ.Max.Unit
Supply
I
VS
Charge pump
V
CP
I
CP
Static operating supply currentVS = 14 V--2.5mA
Charge pump voltage above VS-8-17V
V
= 7 V, VCP = 15 V, Tj ≥ 25 °C-23--12µA
Charge pump current
S
= 7 V, VCP = 15 V, Tj < 25 °C-23--10µA
V
S
Doc ID 5853 Rev 37/18
Electrical specificationsL9380
Table 5.Electrical characteristics (continued)
SymbolParameterTest conditionMin. Typ.Max.Unit
V
= 12 V, VCP = 20 V, Tj ≥ 25 °C-70--45µA
I
t
V
SCP off
V
SCP hys
f
Charge pump current
CP
Charging timeVCP = VS + 8 V CCP = 100 pF--200µs
CP
Overvoltage shut down-20-30V
Overvoltage shut down hysteresis
Charge pump frequency
CP
Gate drivers
(1)
S
= 12 V, VCP = 20 V, Tj < 25 °C-70--38µA
V
S
(1)
-502001000mV
-100250400KHz
I
GSo
I
I
GCP
Gate source currentVG = V
Gate sink currentVG ≥ 0.8 V135mA
GSi
Charge pump current on the gate
Drain - source sensing
V
I
D Leak
I
Smax
V
HYST
Bias current programming voltage
PR
Drain pin leakage currentVS = 0 V; VD =14 V0-5A
I
Drain pin bias currentV
D
Source pin input currentV
Comparator hysteresis--20-mV
Timer
V
V
Timer threshold high-44.44.8V
THi
Timer threshold low-0.30.40.5V
TLo
I
Timer current
T
Inputs
V
V
HIGH
V
INhys
I
1. Not measured guaranteed by design.
Input enable low voltage--0.3-1V
LOW
Input enable high voltage-3-7V
Input enable hysteresis
I
Input source currentVIN ≤ 3 V-30--5μA
IN
Enable sink currentVEN ≥ 1 V5-30μA
EN
Transfer time IN/ENABLEVS = 14 V VG = VS; Open Gate--2.5µs
t
d
(1)
S
-5-3-1mA
VS = 12 V, VG = 20 V, Tj ≥ 25 °C-60--35µA
= 12V, VG = 20 V, Tj < 25 °C-60--28µA
V
S
10 µA ≤ IPR ≤ 100 µA; VD ≥ 4 V 1.822.2V
≥V
+ 1 V; V
S
D
≥V
+ 1 V; V
S
D
IN = 5 V; V
IN = 0 V; V
V
≥ 5 V; VT = 2 V
D
≥5 V0.9 I
D
≥7 V10-60A
D
= 2 V
T
< VD;
S
0.4 I
-0.6
I
PR
PR
PR
-1.1 I
-
0.6 I
-0.4
I
PR
PR
-
PR
-50200500mV
Function is given for supply voltage down to 5.5 V.
Function means: the channels are controlled from the inputs, some other parameters may
exceed the limit. In this case the programming voltage and timer threshold will be lower. This
leads to a lower protection threshold and time.
8/18 Doc ID 5853 Rev 3
L9380Functional description
4 Functional description
The triple high-side Power-MOS Driver features all necessary control and protection
functions to switch on three Power-MOS transistors operating as High-Side switches in
automotive electronic control units. The key application field is relays replacement in
systems where high current loads, usually motors with nominal currents of about 40 A
connected to ground, has to be switched.
A high signal at the EN pin enables all three channels. With enable low gates are clamped to
ground. In this condition the gate sink current is higher than the specified 3 mA. An enable
low signal makes also a reset of the timer.
A low signal at the inputs switch on the gates of the external MOS. A short circuit at the input
leads to permanent activation of the concerned channel. In this case the device can be
disabled with the enable pin. The charge pump loading is not influenced due to the enable
input.
An external N-channel MOS driver in high side configuration needs a gate driving voltage
higher than V
capacitors and one external charge storage capacitor C
The charge pump is dimensioned to load a capacitor CCP of 33 nF in less than 20 ms up to
8V above V
the decay of the charge pump voltage down to that value where no significant influence on
the application occurs.
. It is generated by means of a charge pump with integrated charge transfer
S
. The value of CCP depends on the input capacitance of the external MOS and
S
CP
.
The necessary charging time for C
has to be respected in the sequence of the input
CP
control signals.
As a consequence the lower gate to source voltage can cause a higher drop across the
Power-MOS and get into overload condition. In this case the overload protection timer will
start.
After the protection time the concerned channel will be switched off. Channel 3 is not
equipped with an overload protection. The same situation can occur due to a discharge of
the storage capacitor caused by the gate short to ground. The gate driver that is supplied
from the pin CP, which is the charge pump output, has a sink and source current capability
of 3 mA. For a short-circuit of the load (source to ground) the L9380 has no gate to source
limitation. The gate source protection must be done externally.
Channel 1 and 2 provide drain to source voltage sensing possibility with programmable
shut-off delay when the activation threshold was exceeded.
This threshold V
resistor is determined by the programming resistor R
also the charge and discharge current of the timer capacitor C
threshold V
DSmin
is set by the external resistor RD. The bias current flowing through this
DSmin
and the timer shut off delay time T
V
DSmin
T
off
V
=
PR
= 4.4 CT R
. This external resistor RPR defines
PR
can be calculated:
o
ff
R
⎛⎞
D
----------- -
⎜⎟
R
⎝⎠
PR
PR
. The drain to source
CT
Doc ID 5853 Rev 39/18
Functional descriptionL9380
In application which don’t use the overload protection or if one channel is not used, the
Timer pin of this channel must be connected to ground and the drain pin with a resistor to
V
.
bat
The timing characteristic illustrates the function and the meaning of V
Figure 6). The input current of the overload sense comparator is specified as I
I
PR
+ I
generates a drop across the external resistor RD if the drain pin voltage is higher
Dmax
DSmin
and T
Smax
(see
off
. The sum
than the source pin (see Figure 4). In the switching point the comparator input source pin
currents are equal and the half of the specified current I
. For an offset compensation
Smax
equal external resistors (RD = RS) at drain and source pin are imperative. The drain sense
comparator, which detects the overload, has a symmetrical hysteresis of 20 mV (see
Figure 5).
Exceeding the source pin voltage by 10 mV with respect to the drain voltage forces the timer
capacitor to discharge. Decreasing the source pin voltage 10 mV lower than the drain pin
voltage an overload of the external MOS is detected and the timer capacitor will be loaded.
After reaching a voltage at pin CT higher than the timer threshold V
the influenced
Thi
channel is switched off. In this case the overload is stored in the timer capacitor.
The timer capacitor will be discharged with a ’High’ signal at the input (see Figure 3). After
reaching the lower timer threshold V
the overload protection is reset and the channel is
TLo
able to switch on again.
Figure 3.Timing characteristic
V
IN
V
G
t
d
V
S
V
T
4.4V
0.4V
Figure 4.Drain, source input current.
I
D
IPR + I
Dmax
t
d
V
D
> V
V
DSmin
T
off
= V
S
V
S
V
S
> V
D98AT392
D
D
I
PR
0
10/18 Doc ID 5853 Rev 3
D98AT393
I
SmaxIS
L9380Functional description
Figure 5.Comparator hysteresis
V
T
D98AT394
-10mV
+10mV
V
Dr
V
So
The application diagram is shown in Figure 6. Because of the transients present at the
power lines during operation and possible disturbances in the system the external resistors
are necessary.
Positive ISO-Pulses at Drain, Gate Source are clamped with an active clamping structure.
The clamping voltage is less than 60V. Negative Pulses are only clamped with the ESDStructure less than -15 V. This transients lower than -15 V can influence the other channels.
In order to protect the transistor against overload and gate breakdown protection diodes
between gate and source and gate and drain has to be connected. In case of overvoltage
into V
Then the charge pump capacitor will be loaded by a diode and a resistor in series up to V
(VS > 20 V) the charge pump oscillation is stopped.
S
S
(see Figure 1). In this case the channels are not influenced. In reverse battery condition the
pins D1, D2, S1, S2 follow the battery potential down to -13 V (high impedance) and the
gate driver pins G1, G2 is referred to S1, S2. In this way it is assured that M1 and M2 will not
be driven into the linear conductive mode. This protection function is operating for V
S1
, VS2
down to -15 V. The gate driver output G3 is referred to the D1 in this case. This function
guarantees that the source to source connected N-Channel MOS transistors M3 and M4
remains OFF.
All the supplies and the in- and output of the PC Board are supplied with a 40 wires flat
cable (not used wires are left open). This cable is submitted to the RF in the strip-line like
described in DIN 40839-4 or ISO 11456-5.
The measured circuit was build up on a PCB board with ground plane. In the frequency
range from 1 MHz to 400 MHz and 80 % AM-modulation of 1 kHz with field strength of
200 V/m no influence to the basic function was detected on a typical device.
The failure criteria is an envelope of the output signal with 20 % in the amplitude and 2 % in
the time.
Doc ID 5853 Rev 311/18
Functional descriptionL9380
Figure 6.Application circuit
D1
V
BAT
MICROCONTROLLER
C1D2
C2
C3
VS
T1
IN1
T2
IN2
IN3
EN
VSI
VSI
DRIVER 1
VSI
VSI
DRIVER 2
VSI
DRIVER 3
LOAD CONTROL
≥1
ENN
≥1
ENN
ENN
ENN
-
+
CP
≥1
-
+
CP
≥1
CP
≥1
VSVSI
REG.
2V
REFERENCE
I
PR
CHARGE PUMP
OVERVOLTAGE
IPR
IPR
CP
GND
D1
G1
S1
D2
G2
S2
G3
PR
C4
R1
D3
R2
D4
R3
R4
D5
R5
D6
R6
D7
R7
R8
VALUE DRIVER
U405
D98AT395A
M1
M2
MM1
M3
D8
M4
M M2
L4L3L2L1
Recommendations to the application circuit: The timer and the charge capacitors are loaded
with an alternating current source. A short ground connection of the charge capacitor is
indispensable to avoid electromagnetic emigrations. The dimension of the resistors RD, RG
and RS have to respect the maximum current during transients at each pin.
12/18 Doc ID 5853 Rev 3
L9380Functional description
t
4.1 Typical characteristics curve
Depending on production spread, certain deviations may occure. For limits see Ta bl e 5 .
Figure 7.Charge loading time as function of
V
(Vcp = 8 V +VS)
CH
(ms)
S
D98AT396
Figure 8.Charge pump current as function of
the charge voltage
I
CP
(μA)
D98AT397
20
10
68nF
33nF
10nF
0
610121416VS(V)8
Figure 9.Ground loss protection gate
discarge current for source voltage
I
G
(μA)
-200
-400
-600
-800
-1000
-15-10-5VS(V)
D98AT398
Figure 11. Overvoltage shutdown of the
charge pump with hysteresis
V
CH
(V)
D98AT400
100
16V
12V
10V
50
7V
0
71727V
(V)
C
Figure 10. Input current as function of the
input voltage
I
C
(μA)
-5
-10
-15
-20
01234V
D98AT399
(V)
I
30
20
2424.52525.5VS(V)
Doc ID 5853 Rev 313/18
Functional descriptionL9380
Figure 12. Measured circuit (The EMS of the device was verified in the below described setup)
Electromagnetic emission classes presented below are typical data found on bench test. For
detailes test description please refer to "Electromagnetic Emission (EME) Measurement of
Integrated Circuits, DC to 1 GHz" of VDE/ZVEI work group 767.13 and VDE/ZVEI work
group 767.14 or IEC project number 47A 1967Ed. This data is targeted to board designers
to allow an estimation of emission filtering effort required in application. All measurements
are done with the EMS-board (See Figure 12 and 13).
Table 6.Electromagnetic emission classification
PinEME classRemark
VCPG-w-
Note:Electromagnetic Emission and Susceptivity is not tested in production.
Doc ID 5853 Rev 315/18
Package informationL9380
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 14. SO20 mechanical data and package dimensions
DIM.
A2.352.65 0.0930.104
A10.100.30 0.0040.012
B0.330.51 0.0130.200
C0.230.32 0.0090.0 13
(1)
D
E7.407.60 0.2910.299
e1.270.050
H10.010.65 0.3940.419
h0.250.75 0.0100.030
L0.401.27 0.0160.050
k0˚ (min.), 8˚ (max.)
ddd0.100.004
(1) “D” dimensio n does not include mold flash, prot usions or gate
burrs. Mol d flash, protusions or g ate burrs shall not exceed
0.15mm per sid e.
mminch
MIN. TYP. MAX. MIN. TYP. MAX.
12.6013.0 0 0.4960.512
OUTLINE AND
MECHANICAL DATA
SO20
16/18 Doc ID 5853 Rev 3
0016022 D
L9380Revision history
6 Revision history
Table 7.Document revision history
DateRevisionChanges
20-May-20031Initial release.
05-Mar-20082
01-Feb-20103Updated Table 1: Device summary on page 1.
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