L9951 / L9951XP Functional description of the SPI
Table 20.
SPI - Input data and status register 1 (continued)
Input register 1 (write) Status register 1 (read)
Bit Name
10
9
8
7
6
Comment
OUT5 OC recovery enable
OUT4 OC recovery enable
In case of an over-current event the over-current status bit (status register
0) is set and the output is switched off. If the overcurrent recovery enable bit is set the output will be automatically reactivated after a delay time resulting in a PWM modulated current with a programmable duty cycle
(Bit 13 of Input data register 1).
OUT3 OC recovery enable
OUT2 OC recovery enable
OUT1 OC recovery enable
Depending on occurrence of overcurrent event and internal clock phase it is possible that one recovery cycle is executed even if this bit is set to zero.
5
4
3
2
1
OUT5 PWM enable
OUT4 PWM enable
OUT3 PWM enable
OUT2 PWM enable
OUT1 PWM enable
If the PWM enable bit is set and the output is enabled (input register 0) the output is switched on if
PWM input is high and switched off if PWM input is low.
Name
Not ready bit
Comment
After switching the device from standby mode to active mode an internal timer is started to allow charge pump to settle before the outputs can be activated. This bit is cleared automatically after start up time has finished.
Since this bit is controlled by internal clock it can be used for synchronizing testing events(e.g. measuring filter times).
0
OUT5-HS open-load
OUT4-HS open-load
OUT3-HS open-load
OUT3-LS open-load
OUT2-HS open-load
OUT2-LS open-load
OUT1-HS open-load
OUT1-LS open-load
Not used.
The open-load detection monitors the load current in each activated output stage. If the load current is below the open-load detection threshold for at least 1 ms (t dOL
) the corresponding open-load bit is set. Due to mechanical
/electrical inertia of typical loads a short activation of the outputs (e.g. 3ms) can be used to test the open-load status without changing the mechanical/electrical state of the loads.
0 1 No error bit
A logical NOR-combination of all bits 1 to 14 in both status registers. If bit 14 (Disable
Open-Load) is set, the openload status will be ignored
Doc ID 14173 Rev 9 27/36
Packages thermal data
5 Packages thermal data
Figure 10.
Packages thermal data
L9951 / L9951XP
28/36 Doc ID 14173 Rev 9
L9951 / L9951XP
6
Package and packing information
Package and packing information
6.1 ECOPACK
®
packages
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.
6.2 PowerSO-36™ package information
Figure 11.
PowerSO-36™ package dimensions
Table 21.
PowerSO-36™ mechanical data
Symbol
Min.
A a1 a2 a3 b c
0.10
0
0.22
0.23
Millimeters
Typ.
Doc ID 14173 Rev 9
Max.
3.60
0.30
3.30
0.10
0.38
0.32
29/36
Package and packing information
Table 21.
PowerSO-36™ mechanical data (continued)
Millimeters
Symbol
Min.
Typ.
h
L
M
G
H
N
R s
E2
E3 e e3
D *
D1
E
E1 *
15.80
9.40
13.90
10.90
5.80
0
15.50
0.8
0.65
11.05
L9951 / L9951XP
0.10
15.90
1.10
1.10
10 deg
8 deg
Max.
16.00
9.80
14.5
11.10
2.90
6.20
30/36 Doc ID 14173 Rev 9
L9951 / L9951XP
Figure 12.
PowerSSO-36™ package dimensions
Package and packing information
G1
H h k e e3
F
G
L
N b c
D *
E *
A
A2 a1
Table 22.
PowerSSO-36™ mechanical data
Symbol
Min.
-
2.15
0
0.18
0.23
10.10
7.4
-
-
-
-
10.1
-
0°
0.55
-
Millimeters
Typ.
-
-
-
0.5
8.5
2.3
-
-
-
-
-
-
-
-
-
-
Doc ID 14173 Rev 9
Max.
2.45
2.35
0.1
0.36
0.32
10.50
7.6
-
-
0.1
0.06
10.5
0.4
8°
0.85
10 deg
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Package and packing information
Table 22.
PowerSSO-36™ mechanical data (continued)
Millimeters
Symbol
Min.
Typ.
X
Y
4.3
6.9
-
-
6.4 PowerSO-36™ packing information
Figure 13.
PowerSO-36 TM tube shipment (no suffix)
L9951 / L9951XP
Max.
5.2
7.5
32/36 Doc ID 14173 Rev 9
