L9903 Ver la hoja de datos (PDF) - STMicroelectronics
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L9903 Datasheet PDF : 17 Pages
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L9903
Table 2. Pin Function
N°
Pin
Description
1
ST Open Drain Switch for Stepup converter
2
DG Open drain diagnostic output
3
PWM PWM input for H-bridge control
4
EN Enable input
5
DIR Direction select input for H-bridge control
6
PR Programmable cross conduction protection time
7
RX ISO 9141 interface, receiver output
8
TX ISO 9141 interface, transmitter input
9
K
ISO 9141 Interface, bidirectional communication K-line
10
VS Supply voltage
11
CP Charge pump for driving a power MOS as reverse battery protection
12
GH1 Gate driver for power MOS highside switch in halfbridge 1
13
CB1 External bootstrap capacitor
14
S1 Source/drain of halfbridge 1
15
GH2 Gate driver for power MOS highside switch in halfbridge 2
16
CB2 External bootstrap capacitor
17
S2 Source/drain of halfbridge 2
18
GL2 Gate driver for power MOS lowside switch in halfbridge 2
19
GL1 Gate driver for power MOS lowside switch in halfbridge 1
20
GND Ground
Figure 3. Pin Connection (Top view)
ST
DG
PWM
EN
DIR
PR
RX
TX
K
VS
1
20
2
19
3
18
4
17
5
16
6
15
7
14
8
13
9
12
10
11
SO20
GND
GL1
GL2
S2
CB2
GH2
S1
CB1
GH1
CP
2/17
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