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L9386
Dual intelligent power low side switch
Features

Multipower BCD technology Dual power low side driver with 2 x 5 A Low RDSON typically 200 m @ TJ = 25 C Internal output clamping diodes VFB = 50 V for inductive recirculation Limited output voltage slew rate for low EMI P compatible enable and input Wide operating supply voltage range 4.5 V to 45 V Real time diagnostic functions: - Output shorted to GND - Output shorted to VSS - Open load - Load bypass - Over temperature Device protection functions: - Overload disable - Reverse battery up to -16 V @ VS - Thermal shutdown Device summary
Order code L9386MD Package SO20 (12+4+4) Packing Tube SO20
Description
The L9386 is a monolithic integrated dual low side driver realized in an advanced Multipower BCD mixed technology. It is especially intended to drive valves in automotive environment. Its inputs are P compatible for easy driving. Particular care has been taken to protect the device against failures, to avoid electro-magnetic interferences and to offer extensive real time diagnostic.
Table 1.
Part number L9386
July 2008
Rev 3
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Contents
L9386
Contents
1 2 Block and pins connection diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.1 2.2 2.3 2.4 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Circuit description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3 4
Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
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L9386
Block and pins connection diagrams
1
Block and pins connection diagrams
Figure 1. Block diagram
IN1 DIAG1
Channel 1
OUT1
EN
VS
OUT2 Output Control Overtemp R
Delay Timer
RO
IN2
DIAG2
Q
S
Overload
Diagnostic Control
Openload
Channel 2
GND
Figure 2.
Pins connection (top view)
IN1 DIAG2 OUT2 GND GND GND GND N.C. EN VS
1 2 3 4 5 6 7 8 9 10
20 19 18 17 16 15 14 13 12 11
IN2 DIAG1 OUT1 GND GND GND GND N.C. N.C. N.C.
3/14
Electrical specifications
L9386
2
2.1
Electrical specifications
Absolute maximum ratings
Table 2.
Symbol VSDC VSTR VIN,EN VDDC VODC VOTR IO IOR EO TjEO Tj Tstg DC supply voltage Transient supply voltage (t 500 ms) Input voltage (| | 10 mA |) Diagnostic DC output voltage (| | 50 mA |) DC output voltage Transient output voltage (RL 4 ) Output load current Reverse output current limited by load Switch-off energy for inductive loads (tEO = 250 s, T = 5 ms) Junction temperature during switch-off t = 30 min Junction temperature Storage temperature
Absolute maximum ratings (no damage or latch)
Parameter Value -16 to 45 60 -1.5 to 6 -0.3 to 16 45 60 internal limited -4 50 175 -40 to +150 -55 to +150 A mJ C C C Unit V V V V V V
2.2
Thermal data
Table 3.
Symbol TjDIS Rth j-pins
Thermal data
Parameter Thermal disable junction temperature threshold Thermal resistance junction to pins Value 160 to 190 14 Unit C C/W
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L9386
Electrical specifications
2.3
Table 4.
Electrical characteristics
Electrical characteristics (The electrical characteristics are valid within the below defined operative range, unless otherwise specified.)
Parameter Board supply voltage Stabilized diagnostic output voltage Junction temperature
(1)
Symbol VS VD Tj ISSB IS
VDL
Test condition
Min. 4.5 -0.3 -40
Typ. 12 5
Max. 32 16 150
Unit V V C mA mA V mA
mA
Static standby supply current DC supply current Diagnostic output low voltage Diagnostic output leakage current Diagnostic output current capability Open load voltage threshold
0.73 VEN = L, VO VOuv VEN = VIN = H ID = 2 mA ID = 1 mA 1.3 0.35 0.1 2 0.51 xVS VOC0.9V 6 0.55 xVS VOC1.25V
(2) (1) (2) (1) (2)
1.5 15 5 15 0.5 2 30 0.59 xVS VOC1.6V
IDLE ID VOUV
VS = 0 V or VS = open; VD = 5.5 V Tj 125 C VD 16 V DIAG = L VEN = X, VIN = L
(1)
V
VOUV1,2
Open load difference voltage threshold
VEN = X, VIN1,2 = L VS VOC VOUV VOC = output voltage of other channel
(2)
V VOC0.7V VOC1.25V 320 7 52 1500 20 60 3200 40 VOC1.8V 480 mA A V V/ms K
(3)
IOUC IOOC VOCL SON,OFF RIO
Open load current threshold Over load current threshold Output voltage during clamping Output (fall, rise) slew rate Internal output pull down resistor Output on resistance
VEN = VIN = H
(2)
100 20 5 45 200 10
b) IOCL 100mA
(3)
see Figure 4
VEN = L VS > 9.5 V IO = 2 A Tj = 25 C Tj = 150 C |IEN, IN| (1)
(2)
RDSON
200
300 500 1 0.5 5.5
m
10 mA -1.5 -1.5 2.2 V V
V(EN,IN)L V(EN,IN)H
Logic input low voltage Logic input high voltage
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Electrical specifications Table 4.
L9386
Electrical characteristics (continued) (The electrical characteristics are valid within the below defined operative range, unless otherwise specified.)
Parameter Logic input hysteresis Enable input sink current Logic input sink current Output delay ON time Output delay OFF time Diag. delay output OFF time Diagnostic open load delay time Diagnostic overload delay switch-off time 1 V VEN 5.5 V 1 V VIN 5.5 V
(3) (3) (3) (3) (3)
Symbol V(EN,IN)hys IEN IIN tDON tDOFF tDH-L,Diag. tDIOu tDOL
Test condition
Min. 0.2 10 40
Typ. 0.4 30 95 4
Max. 1 60 180 25 30 65 50 300
Unit V A A s s s s s
see Figure 4 see Figure 4 see Figure 4 see Figure 6 see Figure 3 50 5 5
15 30 8 160
1. 6.5 V VS 16 V (Diagnostic operation range). 2. 4.5 V VS < 6.5 V and 16 V < VS 32 V (Extended operation range). 3. 9 V VS 16 V (Nominal operating range) RL 6 , IO IOOC.
Table 5.
Diagnostic table (operating range: 4.5 V VS 32 V)
Conditions EN L H H L H H X X X X IN X L H X L H L H H Out off off on(1) off off on(1) off off off D.C. Diag. L L H H H L H L L D.C.
Normal function GND short Load bypass Open load VOtyp < 0.55 V VO1,2 1.25 V IOtyp < 320 mA
Tj typ 175 C overtemperature(2) Latched overload IOmin > 5 A Reset overload latch
1. for 4.5 V VS < 6.5 V, IO 2 A diag. table is valid. 2. If one diag. status shows the overtemperature recognition, in parallel this output will be switched OFF internally. The corresponding channel should be switched OFF additional by its Input or ENABLE signal, otherwise the overload latch will be set after tDOL is passed. This behavior will be related to the overdrop sensing which will be used as over load recognition.
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L9386 Figure 3. Diagnostic overload delay time
UI 5V
Electrical specifications
t
IO IO SC 5A
IO UC td OL t
UD 5V
t
Figure 4.
Output slope
U IN
5V V (IN)H V (IN)L td on U OUT td off t
VO C 0.85VO C VS VS-VO C C 0.85VS VO UV 0.15VS Soff Son
t V DIAG VD 0.5V D
tD
t H-L Diag
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Electrical specifications Figure 5. Open load voltage detection block diagram
VBatt.
L9386
L1 OUT1 OUT2
L2
IN 1 R IO R IO
IN 2
VS
55%
-
+
+
-
Enable
&
R
&
S R S
Latch
Q
Latch
Q
&
VO UV1
&
VO UV2
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L9386
Figure 6.
V EN
Logic diagram
V IN
VO u
IO o
td on
td on
td off
IO u
VD latched over. load diagnostic td OL over load current
latch reset
open load current
open load current
open load voltage
td IO
normal operation OFF
td IO
u
normal operation ON
open load current
u
normal operation ON
normal operation OFF
open load voltage
Electrical specifications
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Electrical specifications
L9386
2.4
Circuit description
The L9386 is a dual low side driver for inductive loads like valves in automotive environment. The device is enabled by a common CMOS compatible ENABLE high signal. The internal pull down current sources at the ENABLE and INPUT pins protect the device in open input conditions against malfunctions. An output 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 50V. Each driver is protected against short circuit and thermal overload. In short circuit condition the output will be disabled after a short delay time tDOL to suppress spikes. This disable is latched until a negative slope occur at the correspondent input pin. The thermal disable for TJ > 175 C of the output will be resetted if the junction temperature decreases about 20 C below the disable threshold temperature. 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 20 k, RL > 38) in ON and OFF conditions. The diagnostic operates also in the extended supply voltage range of 4.5 V VS 32 V. Also the output voltages VO1,2 are compared against each other in OFF condition with a fixed offset of VOUV 1,2 to recognize GND bypasses. To suppress mail VO diagnoses during the flyback phases of the compared output, the VO diagnostic includes a latch function. Reaching the flyback clamping voltage VOC the diagnostic signal is resetted by a latch. To activate again this kind of diagnostic a low signal at the correspondent INPUT or the ENABLE pin must occur (see also Figure 5). The diagnostic output level in connection with different ENABLE and INPUT conditions allows to recognize different fail states, like overtemperature, short to VSS, short to GND, bypass to GND and disconnected load (see also Table 5 on page 6). The diagnostic output is also protected against short to UDmax. Oversteping the over load current threshold IOo, the output current will be limited internally during the diagnostic overload delay switch-off time tDOL.
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L9386 Figure 7. Open load voltage detection block diagram
Electrical specifications
+5V
IN1
Z VALVE
Channel 1
DIAG1
OUT1
EN
VS
P Controller
IN2 R QS DIAG2 Diagnostic Control Openload Delay Timer Output Control Overtemp OUT2 RO Z VALVE V Batt
Overload
Channel 2
GND
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Package information
L9386
3
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 8. SO20 mechanical data and package dimensions
mm DIM. MIN. A A1 B C D (1) E e H h L k ddd 10.0 0.25 0.40 2.35 0.10 0.33 0.23 12.60 7.40 1.27 10.65 0.75 1.27 0.394 0.010 0.016 TYP. MAX. 2.65 0.30 0.51 0.32 13.00 7.60 MIN. 0.093 0.004 0.013 0.009 0.496 0.291 0.050 0.419 0.030 0.050 TYP. MAX. 0.104 0.012 0.200 0.013 0.512 0.299 inch
OUTLINE AND MECHANICAL DATA
0 (min.), 8 (max.) 0.10 0.004
(1) "D" dimension does not include mold flash, protusions or gate burrs. Mold flash, protusions or gate burrs shall not exceed 0.15mm per side.
SO20
0016022 D
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L9386
Revision history
4
Revision history
Table 6.
Date 16-Jan-2002 20-Sep-2003 16-Jul-2008
Document revision history
Revision 1 2 3 Initial release. Changed company name and logo. Document reformatted. Added Table 1: Device summary on page 1. Changes
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L9386
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