ST L9848 User Manual
Octal configurable low/high side driver
Features
■ Configurable up to 6 high side drivers
■ R
■ Current limit of each output at min. 0.8 A
■ Supply voltage 4.75 V to 5.25 V
■ Output voltage clamping min. 35 V (low side
mode)
■ Output voltage clamping -30 V (high side
mode)
■ SPI interface for data communication
■ Additional PWM inputs for 2 outputs
■ Thermal shutdown for all outputs
■ Open load detection in off mode
■ Reverse battery protection for outputs (amb)
■ Ground disconnection for high side configured
outputs
Description
The L9848 IC is a highly flexible monolithic
medium current output driver that incorporates 2
dedicated low side outputs (outputs 7-8) and 6
outputs that can be used as either internal low or
high side drives in any combination (outputs 1-6).
Table 1. Device summary
= max.1.5 Ω @ Tj = 25 °C
DSON
L9848
SO-28
In addition, 2 outputs are capable of being
PWMed via an external pin (outputs 5-6). The
integrated standard serial peripheral interface
(SPI) controls all outputs and provides diagnostic
information.
Integrated clamping circuits, waveshaping,
protection against positive and negative voltage
transients and thermal shutdown for all outputs
open a wide range of automotive and industrial
applications
Order code Package Packing
L9848 SO-28 Tube
November 2008 Rev 5 1/27
www.st.com
1
Contents L9848
Contents
1 Block diagram and pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2 Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.1 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.2 Operation conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.3 Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.4 Electrical characteristcs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.4.1 DC characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.4.2 AC characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3 Functional description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
3.1 General features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
3.2 Outputs - Common characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
3.2.1 Output 1-4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
3.2.2 Output 5-6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
3.2.3 Output7-8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
3.3 Main power input (VDD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
3.4 Discrete inputs (IN5-6) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
3.5 Serial peripheral interface (SPI) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
3.5.1 Serial data output (DO) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
3.5.2 Serial data input (DI) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
3.5.3 Chip select (CS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
3.5.4 Serial clock (SCLK) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
3.6 SPI DI input command register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
3.7 Fault operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
3.7.1 Initial fault register SPI Cycle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
3.7.2 Incandescent lamp outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
3.8 Configuration for Output1-6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
3.8.1 Low side drivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
3.8.2 High side drivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
3.9 DRN1-6 susceptibility to negative voltage transients . . . . . . . . . . . . . . . . 18
3.10 Thermal shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
3.11 Charge pump usage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
2/27
L9848 Contents
3.12 Waveshaping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
3.13 POR register initialization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
3.14 Abnormal voltage conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
3.14.1 Reverse Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
3.14.2 Maximum negative transients . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
3.14.3 Ground offsets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
3.14.4 Loss of ground operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4 Functional block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
5 Application examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
6 Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
7 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
3/27
List of tables L9848
List of tables
Table 1. Device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Table 2. Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Table 3. Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Table 4. Operation conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Table 5. Thermal data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Table 6. Electrical characteristcs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Table 7. AC characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Table 8. Bit command register definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Table 9. Command register logic definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Table 10. Fault register definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Table 11. Fault logic definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Table 12. Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
4/27
L9848 List of figures
List of figures
Figure 1. Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Figure 2. Pin connection (top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Figure 3. DO loading for disable time measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Figure 4. Output loading for slew rate measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Figure 5. Output turn on/off delays and slew rates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Figure 6. SPI input/output slew ratest . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Figure 7. SPI timing diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Figure 8. L9848 with external components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Figure 9. L9848 as mirror axis control motor drivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Figure 10. L9848 as mirror motor and bulb driver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Figure 11. L9848 as window lift relay and mirror motor driver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Figure 12. L9848 as bipolar stepper motor driver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Figure 13. L9848 driving approach for 3 bipolar stepper-motors in sequential mode
for climate applications as window lift relay and mirror motor driver. . . . . . . . . . . . . . . . . . 24
Figure 14. SO-28 mechanical data and package dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
5/27
Block diagram and pin description L9848
1 Block diagram and pin description
Figure 1. Block diagram
VDD=5V
SCLK
Di
DO
CS
PWM IN5
PWM IN6
Prepared by G. Bober, July 5 , 2001 System Competence Center Automotive Page 9
SPI
SO-28
Figure 2. Pin connection (top view)
Interface
Gate Driver
≥1
≥1
Automotive Business Unit Europe
GND
DRN1
SRC1
DRN2
SRC2
DRN3
SRC3
DRN4
SRC4
DRN5
SRC5
DRN6
SRC6
DRN7
DRN8
®
GND
VDD
DRN8
SRC2
DRN2
SRC1
DRN1
N.C.
IN6 IN5
SRC6 SRC5
2
3
4
5
6
7
8
9
10
DRN6
N.C.
N.C. CS
12
13
28
27
26
25
24
23
22
21
20
19
18
17
16
DO1
N.C.
DRN7
SCR4
DRN4
SRC3
DRN3
N.C.
DRN511
N.C.
1514SCLK DI
SO-28
6/27
L9848 Block diagram and pin description
Table 2. Pin description
N° Pin Description
1 GND Analog ground
2 VDD 5V supply input
3 DRN8 Drain of low side driver #8
4 SRC2 Source of configurable driver #2
5 DRN2 Drain of configurable driver #2
6 SRC1 Source of configurable driver #1
7 DRN1 Drain of configurable driver #1
8 NC Not connected
9 IN6 PWM input for driver #6
10 SRC6 Source of configurable driver #6
11 DRN6 Drain of configurable driver #6
12 NC Not connected
13 NC Not connected
14 SCLK SPI serial clock input
15 DI SPI data in
16 CS SPI chip select (active high)
17 NC Not connected
18 DRN5 Drain of configurable driver #5
19 SRC5 Source of configurable driver #5
20 IN5 PWM input for driver #5
21 NC Not connected
22 DRN3 Drain of configurable driver #3
23 SRC3 Source of configurable driver #3
24 DRN4 Drain of configurable driver #4
25 SRC4 Source of configurable driver #4
26 DRN7 Drain of low side driver #7
27 NC Not connected
28 DO SPI data out
7/27
Electrical specifications L9848
2 Electrical specifications
2.1 Absolute maximum ratings
Warning: For voltages and currents applied externally to the device.
This part may be irreparably damaged if taken outside the
specified absolute maximum rating range
Table 3. Absolute maximum ratings
Symbol Parameter Value Unit
V
DD
Supply voltage -0.3 to 7.0 V
Pin voltages
VCS, VDI, VDO,
V
SCLK
V
, V
IN5
IN6
– V
V
SRC1
V
DRN1
V
SRC1
V
DRN1
1. Internally limited.
E
out 1-8
– V
– V
– V
SRC8
DRN6
SRC8
DRN6
Data lines voltages -0.3 to 7.0 V
Input voltages -0.3 to 7.0 V
Output DC voltages -13.5 to 40 V
Output DC voltages -13.5 to 60
Output transient voltages -20 to 40 V
Output transient voltages -20 to 60 V
Max. dissipation energy (@ 300mA) 60 mJ
2.2 Operation conditions
Warning: This part may not operate if taken outside the maximum
ratings. Once the condition is returned to within the specified
maximum rating or the power is re-cycled, the part will
recover with no damage or degradation.
(1)
V
Table 4. Operation conditions
Symbol Parameter Value Unit
V
DD
V
Batt
I
out
T
j
Supply voltage 4.75 to 5.25 V
Battery supply voltage 9 to 18 V
Output current (channel 1-8) 350 mA
Junction temperature -40 to 150 °C
8/27
L9848 Electrical specifications
2.3 Thermal data
Table 5. Thermal data
Symbol Parameter Value Unit
T
st
R
th(j-a)
R
th(j-a)
1. With 6cm2 on board heatsink area.
Storage temperature -65 to 150 °C
Thermal resistance junction to ambient max. 70 °C/W
Thermal resistance junction to ambient
(1)
max. 50 °C/W
2.4 Electrical characteristcs
2.4.1 DC characteristics
CS(il)
DI(ih)
DI(il)
VDD
VDD
(T
= -40°C to 150°C, V
j
= 4.75 Vdc to 5.25 Vdc, V
DD
=9 V to 18 V, unless otherwise
Batt
specified)
IN5, 6 input voltage
IN5, 6 input current
CS input voltage
CS input current
SCLK input voltage
SCLK input current
DI input voltage
DI input current
V
IN5,6
V
IN5,6
V
CS
V
CS
V
SCLK
V
SCLK
V
DI
V
DI
= 0V
= V
= 0V
= V
= 0V
= V
dc
DD
= 0V
= V
dc
DD
dc
DD
dc
DD
0.8
30
0.8
30
0.8
0.8
VDD current All outputs ON 4.5 6 mA
VDD current All outputs OFF 0.5 2.0 5.0 mA
I
= 1.6 mA
DO output voltage
DO tri-state current
DO
= -200 µA VDD-0.8
I
DO
V
= 0V
DO
V
DO
= V
dc
DD
2.0 V
|10|
100
2.0 V
|10|
100
2.0 V
|10|
|10|
2.0 V
|10|
|10|
0.4
|10|
|10|
Table 6. Electrical characteristcs
Symbol Parameter Conditions Min. Typ. Max. Unit
V
IN5,6(ih)
V
IN5,6(il)
I
IN5,6(il)
I
IN5,6(ih)
V
CS(ih)
V
I
CS(il)
I
CS(ih)
V
SCLK(ih)
V
SCLK(il)
I
SCLK(il)
I
SCLK(ih)
V
V
I
DI((il)
I
DI((ih)
I
I
V
DO(ol)
V
DO(oh)
I
DO(zol)
I
DO(zoh)
V
µA
µA
V
µA
µA
V
µA
µA
V
µA
µA
V
V
µA
µA
9/27
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