L9903 STMicroelectronics, L9903 Datasheet - Page 12

• Manufacturer Part Number: L9903
• Description: IC CTRLR MOTOR BRIDGE SO-20
• Manufacturer: STMicroelectronics
• Type: Motor Controller/Driverr

Specifications of L9903

• Applications: DC Motor Controller, Bridge
• Number Of Outputs: 1
• Voltage - Supply: 8 V ~ 20 V
• Operating Temperature: -40°C ~ 150°C
• Mounting Type: Surface Mount
• Package / Case: 20-SOIC (7.5mm Width)
• Operating Supply Voltage: 8 V to 20 V
• Supply Current: 50 uA
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Output: -
• Voltage - Load: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

L9903
3.4 Control inputs (EN, DIR, PWM)
The cmos level inputs drive the device as shown in fig.7 and described in the truth table.
The device is activated with enable input HIGH signal. For enable input floating (not connected) or VEN=0V the
device is in standby mode. When activating the device a wake-up time of 50µs is recommended to stabilize the
internal supplies.
The DIR and PWM inputs control the driver of the external H-Bridge transistors. The motor direction can be
choosen with the DIR input, the duty cycle and frequency with the PWM input. Unconnected inputs are defined
by internal pull up resistors. During wake-up and braking and before disactivating the IC via enable both inputs
should be driven HIGH.
Table 6. Truth table:
Symbols: x Don't care
3.5 Thermal shutdown
When the junction temperature exceeds T
the diagnostic DG is LOW until the junction temperature drops below T
3.6 Overvoltage Shutdown
When the supply voltage V
(L), the K- output is off and the diagnostic DG is LOW.
3.7 Undervoltage Shutdown
For supply voltages below the undervoltage disable threshold the gate driver remains in sink condition (L) and
the diagnostic DG is low.
12/17
Status
1
2
3
4
5
6
7
8
6. Only those external MOS transistors of the H-Bridge which are in short circuit condition are switched off. All others remain driven
7. See Application Note AN2229
by DIR and PWM.
EN
0
1
1
1
1
1
1
1
Control inputs
0: Logic LOW or not active
1: Logic HIGH or active
DIR
x
x
x
x
x
0
x
1
PWM
x
x
x
x
x
0
1
0
VS
exceeds the overvoltage threshold V
TS
1
0
0
0
0
0
0
x
Device status
OV
0
1
0
0
0
0
0
x
JSD
R:Resistive output
L: Output in sink condition
H: Output in source condition
T: Tristate
UV
x
0
0
1
0
0
0
0
all driver are switched in sink condition (L), the K- output is off and
SC
x
0
0
0
1
0
0
0
GH1
Driver stage for external
R
X
H
H
L
L
L
L
6)
7)
power MOS
GL1
X
R
H
L
L
L
L
L
6)
VSOVH
GH2
R
X
JSD
H
H
L
L
L
L
7)
6)
all driver are switched in sink condition
- T
GL2
X
JHYST
R
H
L
L
L
L
L
6
Diagnostic
.
UV:Undervoltage
TS:Thermal shutdown
OV:Overvoltage
SC:Short Circuit
DG
H
H
H
T
L
L
L
L
standby mode
short circuit
braking mode
undervoltage
overvoltage
Comment
shutdown
thermal
6)